\n#include \"wayland-client.h\"\n\n#ifdef __cplusplus\nextern \"C\" {\n#endif\n\n/**\n * @page page_xdg_shell The xdg_shell protocol\n * @section page_ifaces_xdg_shell Interfaces\n * - @subpage page_iface_xdg_wm_base - create desktop-style surfaces\n * - @subpage page_iface_xdg_positioner - child surface positioner\n * - @subpage page_iface_xdg_surface - desktop user interface surface base interface\n * - @subpage page_iface_xdg_toplevel - toplevel surface\n * - @subpage page_iface_xdg_popup - short-lived, popup surfaces for menus\n * @section page_copyright_xdg_shell Copyright\n * \n *\n * Copyright Š 2008-2013 Kristian Høgsberg\n * Copyright Š 2013 Rafael Antognolli\n * Copyright Š 2013 Jasper St. Pierre\n * Copyright Š 2010-2013 Intel Corporation\n * Copyright Š 2015-2017 Samsung Electronics Co., Ltd\n * Copyright Š 2015-2017 Red Hat Inc.\n *\n * Permission is hereby granted, free of charge, to any person obtaining a\n * copy of this software and associated documentation files (the \"Software\"),\n * to deal in the Software without restriction, including without limitation\n * the rights to use, copy, modify, merge, publish, distribute, sublicense,\n * and/or sell copies of the Software, and to permit persons to whom the\n * Software is furnished to do so, subject to the following conditions:\n *\n * The above copyright notice and this permission notice (including the next\n * paragraph) shall be included in all copies or substantial portions of the\n * Software.\n *\n * THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\n * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\n * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL\n * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\n * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING\n * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER\n * DEALINGS IN THE SOFTWARE.\n *
\n */\nstruct wl_output;\nstruct wl_seat;\nstruct wl_surface;\nstruct xdg_popup;\nstruct xdg_positioner;\nstruct xdg_surface;\nstruct xdg_toplevel;\nstruct xdg_wm_base;\n\n#ifndef XDG_WM_BASE_INTERFACE\n#define XDG_WM_BASE_INTERFACE\n/**\n * @page page_iface_xdg_wm_base xdg_wm_base\n * @section page_iface_xdg_wm_base_desc Description\n *\n * The xdg_wm_base interface is exposed as a global object enabling clients\n * to turn their wl_surfaces into windows in a desktop environment. It\n * defines the basic functionality needed for clients and the compositor to\n * create windows that can be dragged, resized, maximized, etc, as well as\n * creating transient windows such as popup menus.\n * @section page_iface_xdg_wm_base_api API\n * See @ref iface_xdg_wm_base.\n */\n/**\n * @defgroup iface_xdg_wm_base The xdg_wm_base interface\n *\n * The xdg_wm_base interface is exposed as a global object enabling clients\n * to turn their wl_surfaces into windows in a desktop environment. It\n * defines the basic functionality needed for clients and the compositor to\n * create windows that can be dragged, resized, maximized, etc, as well as\n * creating transient windows such as popup menus.\n */\nextern const struct wl_interface xdg_wm_base_interface;\n#endif\n#ifndef XDG_POSITIONER_INTERFACE\n#define XDG_POSITIONER_INTERFACE\n/**\n * @page page_iface_xdg_positioner xdg_positioner\n * @section page_iface_xdg_positioner_desc Description\n *\n * The xdg_positioner provides a collection of rules for the placement of a\n * child surface relative to a parent surface. Rules can be defined to ensure\n * the child surface remains within the visible area's borders, and to\n * specify how the child surface changes its position, such as sliding along\n * an axis, or flipping around a rectangle. These positioner-created rules are\n * constrained by the requirement that a child surface must intersect with or\n * be at least partially adjacent to its parent surface.\n *\n * See the various requests for details about possible rules.\n *\n * At the time of the request, the compositor makes a copy of the rules\n * specified by the xdg_positioner. Thus, after the request is complete the\n * xdg_positioner object can be destroyed or reused; further changes to the\n * object will have no effect on previous usages.\n *\n * For an xdg_positioner object to be considered complete, it must have a\n * non-zero size set by set_size, and a non-zero anchor rectangle set by\n * set_anchor_rect. Passing an incomplete xdg_positioner object when\n * positioning a surface raises an error.\n * @section page_iface_xdg_positioner_api API\n * See @ref iface_xdg_positioner.\n */\n/**\n * @defgroup iface_xdg_positioner The xdg_positioner interface\n *\n * The xdg_positioner provides a collection of rules for the placement of a\n * child surface relative to a parent surface. Rules can be defined to ensure\n * the child surface remains within the visible area's borders, and to\n * specify how the child surface changes its position, such as sliding along\n * an axis, or flipping around a rectangle. These positioner-created rules are\n * constrained by the requirement that a child surface must intersect with or\n * be at least partially adjacent to its parent surface.\n *\n * See the various requests for details about possible rules.\n *\n * At the time of the request, the compositor makes a copy of the rules\n * specified by the xdg_positioner. Thus, after the request is complete the\n * xdg_positioner object can be destroyed or reused; further changes to the\n * object will have no effect on previous usages.\n *\n * For an xdg_positioner object to be considered complete, it must have a\n * non-zero size set by set_size, and a non-zero anchor rectangle set by\n * set_anchor_rect. Passing an incomplete xdg_positioner object when\n * positioning a surface raises an error.\n */\nextern const struct wl_interface xdg_positioner_interface;\n#endif\n#ifndef XDG_SURFACE_INTERFACE\n#define XDG_SURFACE_INTERFACE\n/**\n * @page page_iface_xdg_surface xdg_surface\n * @section page_iface_xdg_surface_desc Description\n *\n * An interface that may be implemented by a wl_surface, for\n * implementations that provide a desktop-style user interface.\n *\n * It provides a base set of functionality required to construct user\n * interface elements requiring management by the compositor, such as\n * toplevel windows, menus, etc. The types of functionality are split into\n * xdg_surface roles.\n *\n * Creating an xdg_surface does not set the role for a wl_surface. In order\n * to map an xdg_surface, the client must create a role-specific object\n * using, e.g., get_toplevel, get_popup. The wl_surface for any given\n * xdg_surface can have at most one role, and may not be assigned any role\n * not based on xdg_surface.\n *\n * A role must be assigned before any other requests are made to the\n * xdg_surface object.\n *\n * The client must call wl_surface.commit on the corresponding wl_surface\n * for the xdg_surface state to take effect.\n *\n * Creating an xdg_surface from a wl_surface which has a buffer attached or\n * committed is a client error, and any attempts by a client to attach or\n * manipulate a buffer prior to the first xdg_surface.configure call must\n * also be treated as errors.\n *\n * After creating a role-specific object and setting it up, the client must\n * perform an initial commit without any buffer attached. The compositor\n * will reply with an xdg_surface.configure event. The client must\n * acknowledge it and is then allowed to attach a buffer to map the surface.\n *\n * Mapping an xdg_surface-based role surface is defined as making it\n * possible for the surface to be shown by the compositor. Note that\n * a mapped surface is not guaranteed to be visible once it is mapped.\n *\n * For an xdg_surface to be mapped by the compositor, the following\n * conditions must be met:\n * (1) the client has assigned an xdg_surface-based role to the surface\n * (2) the client has set and committed the xdg_surface state and the\n * role-dependent state to the surface\n * (3) the client has committed a buffer to the surface\n *\n * A newly-unmapped surface is considered to have met condition (1) out\n * of the 3 required conditions for mapping a surface if its role surface\n * has not been destroyed.\n * @section page_iface_xdg_surface_api API\n * See @ref iface_xdg_surface.\n */\n/**\n * @defgroup iface_xdg_surface The xdg_surface interface\n *\n * An interface that may be implemented by a wl_surface, for\n * implementations that provide a desktop-style user interface.\n *\n * It provides a base set of functionality required to construct user\n * interface elements requiring management by the compositor, such as\n * toplevel windows, menus, etc. The types of functionality are split into\n * xdg_surface roles.\n *\n * Creating an xdg_surface does not set the role for a wl_surface. In order\n * to map an xdg_surface, the client must create a role-specific object\n * using, e.g., get_toplevel, get_popup. The wl_surface for any given\n * xdg_surface can have at most one role, and may not be assigned any role\n * not based on xdg_surface.\n *\n * A role must be assigned before any other requests are made to the\n * xdg_surface object.\n *\n * The client must call wl_surface.commit on the corresponding wl_surface\n * for the xdg_surface state to take effect.\n *\n * Creating an xdg_surface from a wl_surface which has a buffer attached or\n * committed is a client error, and any attempts by a client to attach or\n * manipulate a buffer prior to the first xdg_surface.configure call must\n * also be treated as errors.\n *\n * After creating a role-specific object and setting it up, the client must\n * perform an initial commit without any buffer attached. The compositor\n * will reply with an xdg_surface.configure event. The client must\n * acknowledge it and is then allowed to attach a buffer to map the surface.\n *\n * Mapping an xdg_surface-based role surface is defined as making it\n * possible for the surface to be shown by the compositor. Note that\n * a mapped surface is not guaranteed to be visible once it is mapped.\n *\n * For an xdg_surface to be mapped by the compositor, the following\n * conditions must be met:\n * (1) the client has assigned an xdg_surface-based role to the surface\n * (2) the client has set and committed the xdg_surface state and the\n * role-dependent state to the surface\n * (3) the client has committed a buffer to the surface\n *\n * A newly-unmapped surface is considered to have met condition (1) out\n * of the 3 required conditions for mapping a surface if its role surface\n * has not been destroyed.\n */\nextern const struct wl_interface xdg_surface_interface;\n#endif\n#ifndef XDG_TOPLEVEL_INTERFACE\n#define XDG_TOPLEVEL_INTERFACE\n/**\n * @page page_iface_xdg_toplevel xdg_toplevel\n * @section page_iface_xdg_toplevel_desc Description\n *\n * This interface defines an xdg_surface role which allows a surface to,\n * among other things, set window-like properties such as maximize,\n * fullscreen, and minimize, set application-specific metadata like title and\n * id, and well as trigger user interactive operations such as interactive\n * resize and move.\n *\n * Unmapping an xdg_toplevel means that the surface cannot be shown\n * by the compositor until it is explicitly mapped again.\n * All active operations (e.g., move, resize) are canceled and all\n * attributes (e.g. title, state, stacking, ...) are discarded for\n * an xdg_toplevel surface when it is unmapped. The xdg_toplevel returns to\n * the state it had right after xdg_surface.get_toplevel. The client\n * can re-map the toplevel by perfoming a commit without any buffer\n * attached, waiting for a configure event and handling it as usual (see\n * xdg_surface description).\n *\n * Attaching a null buffer to a toplevel unmaps the surface.\n * @section page_iface_xdg_toplevel_api API\n * See @ref iface_xdg_toplevel.\n */\n/**\n * @defgroup iface_xdg_toplevel The xdg_toplevel interface\n *\n * This interface defines an xdg_surface role which allows a surface to,\n * among other things, set window-like properties such as maximize,\n * fullscreen, and minimize, set application-specific metadata like title and\n * id, and well as trigger user interactive operations such as interactive\n * resize and move.\n *\n * Unmapping an xdg_toplevel means that the surface cannot be shown\n * by the compositor until it is explicitly mapped again.\n * All active operations (e.g., move, resize) are canceled and all\n * attributes (e.g. title, state, stacking, ...) are discarded for\n * an xdg_toplevel surface when it is unmapped. The xdg_toplevel returns to\n * the state it had right after xdg_surface.get_toplevel. The client\n * can re-map the toplevel by perfoming a commit without any buffer\n * attached, waiting for a configure event and handling it as usual (see\n * xdg_surface description).\n *\n * Attaching a null buffer to a toplevel unmaps the surface.\n */\nextern const struct wl_interface xdg_toplevel_interface;\n#endif\n#ifndef XDG_POPUP_INTERFACE\n#define XDG_POPUP_INTERFACE\n/**\n * @page page_iface_xdg_popup xdg_popup\n * @section page_iface_xdg_popup_desc Description\n *\n * A popup surface is a short-lived, temporary surface. It can be used to\n * implement for example menus, popovers, tooltips and other similar user\n * interface concepts.\n *\n * A popup can be made to take an explicit grab. See xdg_popup.grab for\n * details.\n *\n * When the popup is dismissed, a popup_done event will be sent out, and at\n * the same time the surface will be unmapped. See the xdg_popup.popup_done\n * event for details.\n *\n * Explicitly destroying the xdg_popup object will also dismiss the popup and\n * unmap the surface. Clients that want to dismiss the popup when another\n * surface of their own is clicked should dismiss the popup using the destroy\n * request.\n *\n * A newly created xdg_popup will be stacked on top of all previously created\n * xdg_popup surfaces associated with the same xdg_toplevel.\n *\n * The parent of an xdg_popup must be mapped (see the xdg_surface\n * description) before the xdg_popup itself.\n *\n * The client must call wl_surface.commit on the corresponding wl_surface\n * for the xdg_popup state to take effect.\n * @section page_iface_xdg_popup_api API\n * See @ref iface_xdg_popup.\n */\n/**\n * @defgroup iface_xdg_popup The xdg_popup interface\n *\n * A popup surface is a short-lived, temporary surface. It can be used to\n * implement for example menus, popovers, tooltips and other similar user\n * interface concepts.\n *\n * A popup can be made to take an explicit grab. See xdg_popup.grab for\n * details.\n *\n * When the popup is dismissed, a popup_done event will be sent out, and at\n * the same time the surface will be unmapped. See the xdg_popup.popup_done\n * event for details.\n *\n * Explicitly destroying the xdg_popup object will also dismiss the popup and\n * unmap the surface. Clients that want to dismiss the popup when another\n * surface of their own is clicked should dismiss the popup using the destroy\n * request.\n *\n * A newly created xdg_popup will be stacked on top of all previously created\n * xdg_popup surfaces associated with the same xdg_toplevel.\n *\n * The parent of an xdg_popup must be mapped (see the xdg_surface\n * description) before the xdg_popup itself.\n *\n * The client must call wl_surface.commit on the corresponding wl_surface\n * for the xdg_popup state to take effect.\n */\nextern const struct wl_interface xdg_popup_interface;\n#endif\n\n#ifndef XDG_WM_BASE_ERROR_ENUM\n#define XDG_WM_BASE_ERROR_ENUM\nenum xdg_wm_base_error {\n\t/**\n\t * given wl_surface has another role\n\t */\n\tXDG_WM_BASE_ERROR_ROLE = 0,\n\t/**\n\t * xdg_wm_base was destroyed before children\n\t */\n\tXDG_WM_BASE_ERROR_DEFUNCT_SURFACES = 1,\n\t/**\n\t * the client tried to map or destroy a non-topmost popup\n\t */\n\tXDG_WM_BASE_ERROR_NOT_THE_TOPMOST_POPUP = 2,\n\t/**\n\t * the client specified an invalid popup parent surface\n\t */\n\tXDG_WM_BASE_ERROR_INVALID_POPUP_PARENT = 3,\n\t/**\n\t * the client provided an invalid surface state\n\t */\n\tXDG_WM_BASE_ERROR_INVALID_SURFACE_STATE = 4,\n\t/**\n\t * the client provided an invalid positioner\n\t */\n\tXDG_WM_BASE_ERROR_INVALID_POSITIONER = 5,\n};\n#endif /* XDG_WM_BASE_ERROR_ENUM */\n\n/**\n * @ingroup iface_xdg_wm_base\n * @struct xdg_wm_base_listener\n */\nstruct xdg_wm_base_listener {\n\t/**\n\t * check if the client is alive\n\t *\n\t * The ping event asks the client if it's still alive. Pass the\n\t * serial specified in the event back to the compositor by sending\n\t * a \"pong\" request back with the specified serial. See\n\t * xdg_wm_base.pong.\n\t *\n\t * Compositors can use this to determine if the client is still\n\t * alive. It's unspecified what will happen if the client doesn't\n\t * respond to the ping request, or in what timeframe. Clients\n\t * should try to respond in a reasonable amount of time.\n\t *\n\t * A compositor is free to ping in any way it wants, but a client\n\t * must always respond to any xdg_wm_base object it created.\n\t * @param serial pass this to the pong request\n\t */\n\tvoid (*ping)(void *data,\n\t\t struct xdg_wm_base *xdg_wm_base,\n\t\t uint32_t serial);\n};\n\n/**\n * @ingroup iface_xdg_wm_base\n */\nstatic inline int\nxdg_wm_base_add_listener(struct xdg_wm_base *xdg_wm_base,\n\t\t\t const struct xdg_wm_base_listener *listener, void *data)\n{\n\treturn wl_proxy_add_listener((struct wl_proxy *) xdg_wm_base,\n\t\t\t\t (void (**)(void)) listener, data);\n}\n\n#define XDG_WM_BASE_DESTROY 0\n#define XDG_WM_BASE_CREATE_POSITIONER 1\n#define XDG_WM_BASE_GET_XDG_SURFACE 2\n#define XDG_WM_BASE_PONG 3\n\n/**\n * @ingroup iface_xdg_wm_base\n */\n#define XDG_WM_BASE_PING_SINCE_VERSION 1\n\n/**\n * @ingroup iface_xdg_wm_base\n */\n#define XDG_WM_BASE_DESTROY_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_wm_base\n */\n#define XDG_WM_BASE_CREATE_POSITIONER_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_wm_base\n */\n#define XDG_WM_BASE_GET_XDG_SURFACE_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_wm_base\n */\n#define XDG_WM_BASE_PONG_SINCE_VERSION 1\n\n/** @ingroup iface_xdg_wm_base */\nstatic inline void\nxdg_wm_base_set_user_data(struct xdg_wm_base *xdg_wm_base, void *user_data)\n{\n\twl_proxy_set_user_data((struct wl_proxy *) xdg_wm_base, user_data);\n}\n\n/** @ingroup iface_xdg_wm_base */\nstatic inline void *\nxdg_wm_base_get_user_data(struct xdg_wm_base *xdg_wm_base)\n{\n\treturn wl_proxy_get_user_data((struct wl_proxy *) xdg_wm_base);\n}\n\nstatic inline uint32_t\nxdg_wm_base_get_version(struct xdg_wm_base *xdg_wm_base)\n{\n\treturn wl_proxy_get_version((struct wl_proxy *) xdg_wm_base);\n}\n\n/**\n * @ingroup iface_xdg_wm_base\n *\n * Destroy this xdg_wm_base object.\n *\n * Destroying a bound xdg_wm_base object while there are surfaces\n * still alive created by this xdg_wm_base object instance is illegal\n * and will result in a protocol error.\n */\nstatic inline void\nxdg_wm_base_destroy(struct xdg_wm_base *xdg_wm_base)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_wm_base,\n\t\t\t XDG_WM_BASE_DESTROY);\n\n\twl_proxy_destroy((struct wl_proxy *) xdg_wm_base);\n}\n\n/**\n * @ingroup iface_xdg_wm_base\n *\n * Create a positioner object. A positioner object is used to position\n * surfaces relative to some parent surface. See the interface description\n * and xdg_surface.get_popup for details.\n */\nstatic inline struct xdg_positioner *\nxdg_wm_base_create_positioner(struct xdg_wm_base *xdg_wm_base)\n{\n\tstruct wl_proxy *id;\n\n\tid = wl_proxy_marshal_constructor((struct wl_proxy *) xdg_wm_base,\n\t\t\t XDG_WM_BASE_CREATE_POSITIONER, &xdg_positioner_interface, NULL);\n\n\treturn (struct xdg_positioner *) id;\n}\n\n/**\n * @ingroup iface_xdg_wm_base\n *\n * This creates an xdg_surface for the given surface. While xdg_surface\n * itself is not a role, the corresponding surface may only be assigned\n * a role extending xdg_surface, such as xdg_toplevel or xdg_popup.\n *\n * This creates an xdg_surface for the given surface. An xdg_surface is\n * used as basis to define a role to a given surface, such as xdg_toplevel\n * or xdg_popup. It also manages functionality shared between xdg_surface\n * based surface roles.\n *\n * See the documentation of xdg_surface for more details about what an\n * xdg_surface is and how it is used.\n */\nstatic inline struct xdg_surface *\nxdg_wm_base_get_xdg_surface(struct xdg_wm_base *xdg_wm_base, struct wl_surface *surface)\n{\n\tstruct wl_proxy *id;\n\n\tid = wl_proxy_marshal_constructor((struct wl_proxy *) xdg_wm_base,\n\t\t\t XDG_WM_BASE_GET_XDG_SURFACE, &xdg_surface_interface, NULL, surface);\n\n\treturn (struct xdg_surface *) id;\n}\n\n/**\n * @ingroup iface_xdg_wm_base\n *\n * A client must respond to a ping event with a pong request or\n * the client may be deemed unresponsive. See xdg_wm_base.ping.\n */\nstatic inline void\nxdg_wm_base_pong(struct xdg_wm_base *xdg_wm_base, uint32_t serial)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_wm_base,\n\t\t\t XDG_WM_BASE_PONG, serial);\n}\n\n#ifndef XDG_POSITIONER_ERROR_ENUM\n#define XDG_POSITIONER_ERROR_ENUM\nenum xdg_positioner_error {\n\t/**\n\t * invalid input provided\n\t */\n\tXDG_POSITIONER_ERROR_INVALID_INPUT = 0,\n};\n#endif /* XDG_POSITIONER_ERROR_ENUM */\n\n#ifndef XDG_POSITIONER_ANCHOR_ENUM\n#define XDG_POSITIONER_ANCHOR_ENUM\nenum xdg_positioner_anchor {\n\tXDG_POSITIONER_ANCHOR_NONE = 0,\n\tXDG_POSITIONER_ANCHOR_TOP = 1,\n\tXDG_POSITIONER_ANCHOR_BOTTOM = 2,\n\tXDG_POSITIONER_ANCHOR_LEFT = 3,\n\tXDG_POSITIONER_ANCHOR_RIGHT = 4,\n\tXDG_POSITIONER_ANCHOR_TOP_LEFT = 5,\n\tXDG_POSITIONER_ANCHOR_BOTTOM_LEFT = 6,\n\tXDG_POSITIONER_ANCHOR_TOP_RIGHT = 7,\n\tXDG_POSITIONER_ANCHOR_BOTTOM_RIGHT = 8,\n};\n#endif /* XDG_POSITIONER_ANCHOR_ENUM */\n\n#ifndef XDG_POSITIONER_GRAVITY_ENUM\n#define XDG_POSITIONER_GRAVITY_ENUM\nenum xdg_positioner_gravity {\n\tXDG_POSITIONER_GRAVITY_NONE = 0,\n\tXDG_POSITIONER_GRAVITY_TOP = 1,\n\tXDG_POSITIONER_GRAVITY_BOTTOM = 2,\n\tXDG_POSITIONER_GRAVITY_LEFT = 3,\n\tXDG_POSITIONER_GRAVITY_RIGHT = 4,\n\tXDG_POSITIONER_GRAVITY_TOP_LEFT = 5,\n\tXDG_POSITIONER_GRAVITY_BOTTOM_LEFT = 6,\n\tXDG_POSITIONER_GRAVITY_TOP_RIGHT = 7,\n\tXDG_POSITIONER_GRAVITY_BOTTOM_RIGHT = 8,\n};\n#endif /* XDG_POSITIONER_GRAVITY_ENUM */\n\n#ifndef XDG_POSITIONER_CONSTRAINT_ADJUSTMENT_ENUM\n#define XDG_POSITIONER_CONSTRAINT_ADJUSTMENT_ENUM\n/**\n * @ingroup iface_xdg_positioner\n * vertically resize the surface\n *\n * Resize the surface vertically so that it is completely unconstrained.\n */\nenum xdg_positioner_constraint_adjustment {\n\tXDG_POSITIONER_CONSTRAINT_ADJUSTMENT_NONE = 0,\n\tXDG_POSITIONER_CONSTRAINT_ADJUSTMENT_SLIDE_X = 1,\n\tXDG_POSITIONER_CONSTRAINT_ADJUSTMENT_SLIDE_Y = 2,\n\tXDG_POSITIONER_CONSTRAINT_ADJUSTMENT_FLIP_X = 4,\n\tXDG_POSITIONER_CONSTRAINT_ADJUSTMENT_FLIP_Y = 8,\n\tXDG_POSITIONER_CONSTRAINT_ADJUSTMENT_RESIZE_X = 16,\n\tXDG_POSITIONER_CONSTRAINT_ADJUSTMENT_RESIZE_Y = 32,\n};\n#endif /* XDG_POSITIONER_CONSTRAINT_ADJUSTMENT_ENUM */\n\n#define XDG_POSITIONER_DESTROY 0\n#define XDG_POSITIONER_SET_SIZE 1\n#define XDG_POSITIONER_SET_ANCHOR_RECT 2\n#define XDG_POSITIONER_SET_ANCHOR 3\n#define XDG_POSITIONER_SET_GRAVITY 4\n#define XDG_POSITIONER_SET_CONSTRAINT_ADJUSTMENT 5\n#define XDG_POSITIONER_SET_OFFSET 6\n#define XDG_POSITIONER_SET_REACTIVE 7\n#define XDG_POSITIONER_SET_PARENT_SIZE 8\n#define XDG_POSITIONER_SET_PARENT_CONFIGURE 9\n\n\n/**\n * @ingroup iface_xdg_positioner\n */\n#define XDG_POSITIONER_DESTROY_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_positioner\n */\n#define XDG_POSITIONER_SET_SIZE_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_positioner\n */\n#define XDG_POSITIONER_SET_ANCHOR_RECT_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_positioner\n */\n#define XDG_POSITIONER_SET_ANCHOR_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_positioner\n */\n#define XDG_POSITIONER_SET_GRAVITY_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_positioner\n */\n#define XDG_POSITIONER_SET_CONSTRAINT_ADJUSTMENT_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_positioner\n */\n#define XDG_POSITIONER_SET_OFFSET_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_positioner\n */\n#define XDG_POSITIONER_SET_REACTIVE_SINCE_VERSION 3\n/**\n * @ingroup iface_xdg_positioner\n */\n#define XDG_POSITIONER_SET_PARENT_SIZE_SINCE_VERSION 3\n/**\n * @ingroup iface_xdg_positioner\n */\n#define XDG_POSITIONER_SET_PARENT_CONFIGURE_SINCE_VERSION 3\n\n/** @ingroup iface_xdg_positioner */\nstatic inline void\nxdg_positioner_set_user_data(struct xdg_positioner *xdg_positioner, void *user_data)\n{\n\twl_proxy_set_user_data((struct wl_proxy *) xdg_positioner, user_data);\n}\n\n/** @ingroup iface_xdg_positioner */\nstatic inline void *\nxdg_positioner_get_user_data(struct xdg_positioner *xdg_positioner)\n{\n\treturn wl_proxy_get_user_data((struct wl_proxy *) xdg_positioner);\n}\n\nstatic inline uint32_t\nxdg_positioner_get_version(struct xdg_positioner *xdg_positioner)\n{\n\treturn wl_proxy_get_version((struct wl_proxy *) xdg_positioner);\n}\n\n/**\n * @ingroup iface_xdg_positioner\n *\n * Notify the compositor that the xdg_positioner will no longer be used.\n */\nstatic inline void\nxdg_positioner_destroy(struct xdg_positioner *xdg_positioner)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_positioner,\n\t\t\t XDG_POSITIONER_DESTROY);\n\n\twl_proxy_destroy((struct wl_proxy *) xdg_positioner);\n}\n\n/**\n * @ingroup iface_xdg_positioner\n *\n * Set the size of the surface that is to be positioned with the positioner\n * object. The size is in surface-local coordinates and corresponds to the\n * window geometry. See xdg_surface.set_window_geometry.\n *\n * If a zero or negative size is set the invalid_input error is raised.\n */\nstatic inline void\nxdg_positioner_set_size(struct xdg_positioner *xdg_positioner, int32_t width, int32_t height)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_positioner,\n\t\t\t XDG_POSITIONER_SET_SIZE, width, height);\n}\n\n/**\n * @ingroup iface_xdg_positioner\n *\n * Specify the anchor rectangle within the parent surface that the child\n * surface will be placed relative to. The rectangle is relative to the\n * window geometry as defined by xdg_surface.set_window_geometry of the\n * parent surface.\n *\n * When the xdg_positioner object is used to position a child surface, the\n * anchor rectangle may not extend outside the window geometry of the\n * positioned child's parent surface.\n *\n * If a negative size is set the invalid_input error is raised.\n */\nstatic inline void\nxdg_positioner_set_anchor_rect(struct xdg_positioner *xdg_positioner, int32_t x, int32_t y, int32_t width, int32_t height)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_positioner,\n\t\t\t XDG_POSITIONER_SET_ANCHOR_RECT, x, y, width, height);\n}\n\n/**\n * @ingroup iface_xdg_positioner\n *\n * Defines the anchor point for the anchor rectangle. The specified anchor\n * is used derive an anchor point that the child surface will be\n * positioned relative to. If a corner anchor is set (e.g. 'top_left' or\n * 'bottom_right'), the anchor point will be at the specified corner;\n * otherwise, the derived anchor point will be centered on the specified\n * edge, or in the center of the anchor rectangle if no edge is specified.\n */\nstatic inline void\nxdg_positioner_set_anchor(struct xdg_positioner *xdg_positioner, uint32_t anchor)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_positioner,\n\t\t\t XDG_POSITIONER_SET_ANCHOR, anchor);\n}\n\n/**\n * @ingroup iface_xdg_positioner\n *\n * Defines in what direction a surface should be positioned, relative to\n * the anchor point of the parent surface. If a corner gravity is\n * specified (e.g. 'bottom_right' or 'top_left'), then the child surface\n * will be placed towards the specified gravity; otherwise, the child\n * surface will be centered over the anchor point on any axis that had no\n * gravity specified.\n */\nstatic inline void\nxdg_positioner_set_gravity(struct xdg_positioner *xdg_positioner, uint32_t gravity)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_positioner,\n\t\t\t XDG_POSITIONER_SET_GRAVITY, gravity);\n}\n\n/**\n * @ingroup iface_xdg_positioner\n *\n * Specify how the window should be positioned if the originally intended\n * position caused the surface to be constrained, meaning at least\n * partially outside positioning boundaries set by the compositor. The\n * adjustment is set by constructing a bitmask describing the adjustment to\n * be made when the surface is constrained on that axis.\n *\n * If no bit for one axis is set, the compositor will assume that the child\n * surface should not change its position on that axis when constrained.\n *\n * If more than one bit for one axis is set, the order of how adjustments\n * are applied is specified in the corresponding adjustment descriptions.\n *\n * The default adjustment is none.\n */\nstatic inline void\nxdg_positioner_set_constraint_adjustment(struct xdg_positioner *xdg_positioner, uint32_t constraint_adjustment)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_positioner,\n\t\t\t XDG_POSITIONER_SET_CONSTRAINT_ADJUSTMENT, constraint_adjustment);\n}\n\n/**\n * @ingroup iface_xdg_positioner\n *\n * Specify the surface position offset relative to the position of the\n * anchor on the anchor rectangle and the anchor on the surface. For\n * example if the anchor of the anchor rectangle is at (x, y), the surface\n * has the gravity bottom|right, and the offset is (ox, oy), the calculated\n * surface position will be (x + ox, y + oy). The offset position of the\n * surface is the one used for constraint testing. See\n * set_constraint_adjustment.\n *\n * An example use case is placing a popup menu on top of a user interface\n * element, while aligning the user interface element of the parent surface\n * with some user interface element placed somewhere in the popup surface.\n */\nstatic inline void\nxdg_positioner_set_offset(struct xdg_positioner *xdg_positioner, int32_t x, int32_t y)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_positioner,\n\t\t\t XDG_POSITIONER_SET_OFFSET, x, y);\n}\n\n/**\n * @ingroup iface_xdg_positioner\n *\n * When set reactive, the surface is reconstrained if the conditions used\n * for constraining changed, e.g. the parent window moved.\n *\n * If the conditions changed and the popup was reconstrained, an\n * xdg_popup.configure event is sent with updated geometry, followed by an\n * xdg_surface.configure event.\n */\nstatic inline void\nxdg_positioner_set_reactive(struct xdg_positioner *xdg_positioner)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_positioner,\n\t\t\t XDG_POSITIONER_SET_REACTIVE);\n}\n\n/**\n * @ingroup iface_xdg_positioner\n *\n * Set the parent window geometry the compositor should use when\n * positioning the popup. The compositor may use this information to\n * determine the future state the popup should be constrained using. If\n * this doesn't match the dimension of the parent the popup is eventually\n * positioned against, the behavior is undefined.\n *\n * The arguments are given in the surface-local coordinate space.\n */\nstatic inline void\nxdg_positioner_set_parent_size(struct xdg_positioner *xdg_positioner, int32_t parent_width, int32_t parent_height)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_positioner,\n\t\t\t XDG_POSITIONER_SET_PARENT_SIZE, parent_width, parent_height);\n}\n\n/**\n * @ingroup iface_xdg_positioner\n *\n * Set the serial of an xdg_surface.configure event this positioner will be\n * used in response to. The compositor may use this information together\n * with set_parent_size to determine what future state the popup should be\n * constrained using.\n */\nstatic inline void\nxdg_positioner_set_parent_configure(struct xdg_positioner *xdg_positioner, uint32_t serial)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_positioner,\n\t\t\t XDG_POSITIONER_SET_PARENT_CONFIGURE, serial);\n}\n\n#ifndef XDG_SURFACE_ERROR_ENUM\n#define XDG_SURFACE_ERROR_ENUM\nenum xdg_surface_error {\n\tXDG_SURFACE_ERROR_NOT_CONSTRUCTED = 1,\n\tXDG_SURFACE_ERROR_ALREADY_CONSTRUCTED = 2,\n\tXDG_SURFACE_ERROR_UNCONFIGURED_BUFFER = 3,\n};\n#endif /* XDG_SURFACE_ERROR_ENUM */\n\n/**\n * @ingroup iface_xdg_surface\n * @struct xdg_surface_listener\n */\nstruct xdg_surface_listener {\n\t/**\n\t * suggest a surface change\n\t *\n\t * The configure event marks the end of a configure sequence. A\n\t * configure sequence is a set of one or more events configuring\n\t * the state of the xdg_surface, including the final\n\t * xdg_surface.configure event.\n\t *\n\t * Where applicable, xdg_surface surface roles will during a\n\t * configure sequence extend this event as a latched state sent as\n\t * events before the xdg_surface.configure event. Such events\n\t * should be considered to make up a set of atomically applied\n\t * configuration states, where the xdg_surface.configure commits\n\t * the accumulated state.\n\t *\n\t * Clients should arrange their surface for the new states, and\n\t * then send an ack_configure request with the serial sent in this\n\t * configure event at some point before committing the new surface.\n\t *\n\t * If the client receives multiple configure events before it can\n\t * respond to one, it is free to discard all but the last event it\n\t * received.\n\t * @param serial serial of the configure event\n\t */\n\tvoid (*configure)(void *data,\n\t\t\t struct xdg_surface *xdg_surface,\n\t\t\t uint32_t serial);\n};\n\n/**\n * @ingroup iface_xdg_surface\n */\nstatic inline int\nxdg_surface_add_listener(struct xdg_surface *xdg_surface,\n\t\t\t const struct xdg_surface_listener *listener, void *data)\n{\n\treturn wl_proxy_add_listener((struct wl_proxy *) xdg_surface,\n\t\t\t\t (void (**)(void)) listener, data);\n}\n\n#define XDG_SURFACE_DESTROY 0\n#define XDG_SURFACE_GET_TOPLEVEL 1\n#define XDG_SURFACE_GET_POPUP 2\n#define XDG_SURFACE_SET_WINDOW_GEOMETRY 3\n#define XDG_SURFACE_ACK_CONFIGURE 4\n\n/**\n * @ingroup iface_xdg_surface\n */\n#define XDG_SURFACE_CONFIGURE_SINCE_VERSION 1\n\n/**\n * @ingroup iface_xdg_surface\n */\n#define XDG_SURFACE_DESTROY_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_surface\n */\n#define XDG_SURFACE_GET_TOPLEVEL_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_surface\n */\n#define XDG_SURFACE_GET_POPUP_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_surface\n */\n#define XDG_SURFACE_SET_WINDOW_GEOMETRY_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_surface\n */\n#define XDG_SURFACE_ACK_CONFIGURE_SINCE_VERSION 1\n\n/** @ingroup iface_xdg_surface */\nstatic inline void\nxdg_surface_set_user_data(struct xdg_surface *xdg_surface, void *user_data)\n{\n\twl_proxy_set_user_data((struct wl_proxy *) xdg_surface, user_data);\n}\n\n/** @ingroup iface_xdg_surface */\nstatic inline void *\nxdg_surface_get_user_data(struct xdg_surface *xdg_surface)\n{\n\treturn wl_proxy_get_user_data((struct wl_proxy *) xdg_surface);\n}\n\nstatic inline uint32_t\nxdg_surface_get_version(struct xdg_surface *xdg_surface)\n{\n\treturn wl_proxy_get_version((struct wl_proxy *) xdg_surface);\n}\n\n/**\n * @ingroup iface_xdg_surface\n *\n * Destroy the xdg_surface object. An xdg_surface must only be destroyed\n * after its role object has been destroyed.\n */\nstatic inline void\nxdg_surface_destroy(struct xdg_surface *xdg_surface)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_surface,\n\t\t\t XDG_SURFACE_DESTROY);\n\n\twl_proxy_destroy((struct wl_proxy *) xdg_surface);\n}\n\n/**\n * @ingroup iface_xdg_surface\n *\n * This creates an xdg_toplevel object for the given xdg_surface and gives\n * the associated wl_surface the xdg_toplevel role.\n *\n * See the documentation of xdg_toplevel for more details about what an\n * xdg_toplevel is and how it is used.\n */\nstatic inline struct xdg_toplevel *\nxdg_surface_get_toplevel(struct xdg_surface *xdg_surface)\n{\n\tstruct wl_proxy *id;\n\n\tid = wl_proxy_marshal_constructor((struct wl_proxy *) xdg_surface,\n\t\t\t XDG_SURFACE_GET_TOPLEVEL, &xdg_toplevel_interface, NULL);\n\n\treturn (struct xdg_toplevel *) id;\n}\n\n/**\n * @ingroup iface_xdg_surface\n *\n * This creates an xdg_popup object for the given xdg_surface and gives\n * the associated wl_surface the xdg_popup role.\n *\n * If null is passed as a parent, a parent surface must be specified using\n * some other protocol, before committing the initial state.\n *\n * See the documentation of xdg_popup for more details about what an\n * xdg_popup is and how it is used.\n */\nstatic inline struct xdg_popup *\nxdg_surface_get_popup(struct xdg_surface *xdg_surface, struct xdg_surface *parent, struct xdg_positioner *positioner)\n{\n\tstruct wl_proxy *id;\n\n\tid = wl_proxy_marshal_constructor((struct wl_proxy *) xdg_surface,\n\t\t\t XDG_SURFACE_GET_POPUP, &xdg_popup_interface, NULL, parent, positioner);\n\n\treturn (struct xdg_popup *) id;\n}\n\n/**\n * @ingroup iface_xdg_surface\n *\n * The window geometry of a surface is its \"visible bounds\" from the\n * user's perspective. Client-side decorations often have invisible\n * portions like drop-shadows which should be ignored for the\n * purposes of aligning, placing and constraining windows.\n *\n * The window geometry is double buffered, and will be applied at the\n * time wl_surface.commit of the corresponding wl_surface is called.\n *\n * When maintaining a position, the compositor should treat the (x, y)\n * coordinate of the window geometry as the top left corner of the window.\n * A client changing the (x, y) window geometry coordinate should in\n * general not alter the position of the window.\n *\n * Once the window geometry of the surface is set, it is not possible to\n * unset it, and it will remain the same until set_window_geometry is\n * called again, even if a new subsurface or buffer is attached.\n *\n * If never set, the value is the full bounds of the surface,\n * including any subsurfaces. This updates dynamically on every\n * commit. This unset is meant for extremely simple clients.\n *\n * The arguments are given in the surface-local coordinate space of\n * the wl_surface associated with this xdg_surface.\n *\n * The width and height must be greater than zero. Setting an invalid size\n * will raise an error. When applied, the effective window geometry will be\n * the set window geometry clamped to the bounding rectangle of the\n * combined geometry of the surface of the xdg_surface and the associated\n * subsurfaces.\n */\nstatic inline void\nxdg_surface_set_window_geometry(struct xdg_surface *xdg_surface, int32_t x, int32_t y, int32_t width, int32_t height)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_surface,\n\t\t\t XDG_SURFACE_SET_WINDOW_GEOMETRY, x, y, width, height);\n}\n\n/**\n * @ingroup iface_xdg_surface\n *\n * When a configure event is received, if a client commits the\n * surface in response to the configure event, then the client\n * must make an ack_configure request sometime before the commit\n * request, passing along the serial of the configure event.\n *\n * For instance, for toplevel surfaces the compositor might use this\n * information to move a surface to the top left only when the client has\n * drawn itself for the maximized or fullscreen state.\n *\n * If the client receives multiple configure events before it\n * can respond to one, it only has to ack the last configure event.\n *\n * A client is not required to commit immediately after sending\n * an ack_configure request - it may even ack_configure several times\n * before its next surface commit.\n *\n * A client may send multiple ack_configure requests before committing, but\n * only the last request sent before a commit indicates which configure\n * event the client really is responding to.\n */\nstatic inline void\nxdg_surface_ack_configure(struct xdg_surface *xdg_surface, uint32_t serial)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_surface,\n\t\t\t XDG_SURFACE_ACK_CONFIGURE, serial);\n}\n\n#ifndef XDG_TOPLEVEL_RESIZE_EDGE_ENUM\n#define XDG_TOPLEVEL_RESIZE_EDGE_ENUM\n/**\n * @ingroup iface_xdg_toplevel\n * edge values for resizing\n *\n * These values are used to indicate which edge of a surface\n * is being dragged in a resize operation.\n */\nenum xdg_toplevel_resize_edge {\n\tXDG_TOPLEVEL_RESIZE_EDGE_NONE = 0,\n\tXDG_TOPLEVEL_RESIZE_EDGE_TOP = 1,\n\tXDG_TOPLEVEL_RESIZE_EDGE_BOTTOM = 2,\n\tXDG_TOPLEVEL_RESIZE_EDGE_LEFT = 4,\n\tXDG_TOPLEVEL_RESIZE_EDGE_TOP_LEFT = 5,\n\tXDG_TOPLEVEL_RESIZE_EDGE_BOTTOM_LEFT = 6,\n\tXDG_TOPLEVEL_RESIZE_EDGE_RIGHT = 8,\n\tXDG_TOPLEVEL_RESIZE_EDGE_TOP_RIGHT = 9,\n\tXDG_TOPLEVEL_RESIZE_EDGE_BOTTOM_RIGHT = 10,\n};\n#endif /* XDG_TOPLEVEL_RESIZE_EDGE_ENUM */\n\n#ifndef XDG_TOPLEVEL_STATE_ENUM\n#define XDG_TOPLEVEL_STATE_ENUM\n/**\n * @ingroup iface_xdg_toplevel\n * the surface is tiled\n *\n * The window is currently in a tiled layout and the bottom edge is\n * considered to be adjacent to another part of the tiling grid.\n */\nenum xdg_toplevel_state {\n\t/**\n\t * the surface is maximized\n\t */\n\tXDG_TOPLEVEL_STATE_MAXIMIZED = 1,\n\t/**\n\t * the surface is fullscreen\n\t */\n\tXDG_TOPLEVEL_STATE_FULLSCREEN = 2,\n\t/**\n\t * the surface is being resized\n\t */\n\tXDG_TOPLEVEL_STATE_RESIZING = 3,\n\t/**\n\t * the surface is now activated\n\t */\n\tXDG_TOPLEVEL_STATE_ACTIVATED = 4,\n\t/**\n\t * @since 2\n\t */\n\tXDG_TOPLEVEL_STATE_TILED_LEFT = 5,\n\t/**\n\t * @since 2\n\t */\n\tXDG_TOPLEVEL_STATE_TILED_RIGHT = 6,\n\t/**\n\t * @since 2\n\t */\n\tXDG_TOPLEVEL_STATE_TILED_TOP = 7,\n\t/**\n\t * @since 2\n\t */\n\tXDG_TOPLEVEL_STATE_TILED_BOTTOM = 8,\n};\n/**\n * @ingroup iface_xdg_toplevel\n */\n#define XDG_TOPLEVEL_STATE_TILED_LEFT_SINCE_VERSION 2\n/**\n * @ingroup iface_xdg_toplevel\n */\n#define XDG_TOPLEVEL_STATE_TILED_RIGHT_SINCE_VERSION 2\n/**\n * @ingroup iface_xdg_toplevel\n */\n#define XDG_TOPLEVEL_STATE_TILED_TOP_SINCE_VERSION 2\n/**\n * @ingroup iface_xdg_toplevel\n */\n#define XDG_TOPLEVEL_STATE_TILED_BOTTOM_SINCE_VERSION 2\n#endif /* XDG_TOPLEVEL_STATE_ENUM */\n\n/**\n * @ingroup iface_xdg_toplevel\n * @struct xdg_toplevel_listener\n */\nstruct xdg_toplevel_listener {\n\t/**\n\t * suggest a surface change\n\t *\n\t * This configure event asks the client to resize its toplevel\n\t * surface or to change its state. The configured state should not\n\t * be applied immediately. See xdg_surface.configure for details.\n\t *\n\t * The width and height arguments specify a hint to the window\n\t * about how its surface should be resized in window geometry\n\t * coordinates. See set_window_geometry.\n\t *\n\t * If the width or height arguments are zero, it means the client\n\t * should decide its own window dimension. This may happen when the\n\t * compositor needs to configure the state of the surface but\n\t * doesn't have any information about any previous or expected\n\t * dimension.\n\t *\n\t * The states listed in the event specify how the width/height\n\t * arguments should be interpreted, and possibly how it should be\n\t * drawn.\n\t *\n\t * Clients must send an ack_configure in response to this event.\n\t * See xdg_surface.configure and xdg_surface.ack_configure for\n\t * details.\n\t */\n\tvoid (*configure)(void *data,\n\t\t\t struct xdg_toplevel *xdg_toplevel,\n\t\t\t int32_t width,\n\t\t\t int32_t height,\n\t\t\t struct wl_array *states);\n\t/**\n\t * surface wants to be closed\n\t *\n\t * The close event is sent by the compositor when the user wants\n\t * the surface to be closed. This should be equivalent to the user\n\t * clicking the close button in client-side decorations, if your\n\t * application has any.\n\t *\n\t * This is only a request that the user intends to close the\n\t * window. The client may choose to ignore this request, or show a\n\t * dialog to ask the user to save their data, etc.\n\t */\n\tvoid (*close)(void *data,\n\t\t struct xdg_toplevel *xdg_toplevel);\n};\n\n/**\n * @ingroup iface_xdg_toplevel\n */\nstatic inline int\nxdg_toplevel_add_listener(struct xdg_toplevel *xdg_toplevel,\n\t\t\t const struct xdg_toplevel_listener *listener, void *data)\n{\n\treturn wl_proxy_add_listener((struct wl_proxy *) xdg_toplevel,\n\t\t\t\t (void (**)(void)) listener, data);\n}\n\n#define XDG_TOPLEVEL_DESTROY 0\n#define XDG_TOPLEVEL_SET_PARENT 1\n#define XDG_TOPLEVEL_SET_TITLE 2\n#define XDG_TOPLEVEL_SET_APP_ID 3\n#define XDG_TOPLEVEL_SHOW_WINDOW_MENU 4\n#define XDG_TOPLEVEL_MOVE 5\n#define XDG_TOPLEVEL_RESIZE 6\n#define XDG_TOPLEVEL_SET_MAX_SIZE 7\n#define XDG_TOPLEVEL_SET_MIN_SIZE 8\n#define XDG_TOPLEVEL_SET_MAXIMIZED 9\n#define XDG_TOPLEVEL_UNSET_MAXIMIZED 10\n#define XDG_TOPLEVEL_SET_FULLSCREEN 11\n#define XDG_TOPLEVEL_UNSET_FULLSCREEN 12\n#define XDG_TOPLEVEL_SET_MINIMIZED 13\n\n/**\n * @ingroup iface_xdg_toplevel\n */\n#define XDG_TOPLEVEL_CONFIGURE_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_toplevel\n */\n#define XDG_TOPLEVEL_CLOSE_SINCE_VERSION 1\n\n/**\n * @ingroup iface_xdg_toplevel\n */\n#define XDG_TOPLEVEL_DESTROY_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_toplevel\n */\n#define XDG_TOPLEVEL_SET_PARENT_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_toplevel\n */\n#define XDG_TOPLEVEL_SET_TITLE_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_toplevel\n */\n#define XDG_TOPLEVEL_SET_APP_ID_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_toplevel\n */\n#define XDG_TOPLEVEL_SHOW_WINDOW_MENU_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_toplevel\n */\n#define XDG_TOPLEVEL_MOVE_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_toplevel\n */\n#define XDG_TOPLEVEL_RESIZE_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_toplevel\n */\n#define XDG_TOPLEVEL_SET_MAX_SIZE_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_toplevel\n */\n#define XDG_TOPLEVEL_SET_MIN_SIZE_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_toplevel\n */\n#define XDG_TOPLEVEL_SET_MAXIMIZED_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_toplevel\n */\n#define XDG_TOPLEVEL_UNSET_MAXIMIZED_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_toplevel\n */\n#define XDG_TOPLEVEL_SET_FULLSCREEN_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_toplevel\n */\n#define XDG_TOPLEVEL_UNSET_FULLSCREEN_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_toplevel\n */\n#define XDG_TOPLEVEL_SET_MINIMIZED_SINCE_VERSION 1\n\n/** @ingroup iface_xdg_toplevel */\nstatic inline void\nxdg_toplevel_set_user_data(struct xdg_toplevel *xdg_toplevel, void *user_data)\n{\n\twl_proxy_set_user_data((struct wl_proxy *) xdg_toplevel, user_data);\n}\n\n/** @ingroup iface_xdg_toplevel */\nstatic inline void *\nxdg_toplevel_get_user_data(struct xdg_toplevel *xdg_toplevel)\n{\n\treturn wl_proxy_get_user_data((struct wl_proxy *) xdg_toplevel);\n}\n\nstatic inline uint32_t\nxdg_toplevel_get_version(struct xdg_toplevel *xdg_toplevel)\n{\n\treturn wl_proxy_get_version((struct wl_proxy *) xdg_toplevel);\n}\n\n/**\n * @ingroup iface_xdg_toplevel\n *\n * This request destroys the role surface and unmaps the surface;\n * see \"Unmapping\" behavior in interface section for details.\n */\nstatic inline void\nxdg_toplevel_destroy(struct xdg_toplevel *xdg_toplevel)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_toplevel,\n\t\t\t XDG_TOPLEVEL_DESTROY);\n\n\twl_proxy_destroy((struct wl_proxy *) xdg_toplevel);\n}\n\n/**\n * @ingroup iface_xdg_toplevel\n *\n * Set the \"parent\" of this surface. This surface should be stacked\n * above the parent surface and all other ancestor surfaces.\n *\n * Parent windows should be set on dialogs, toolboxes, or other\n * \"auxiliary\" surfaces, so that the parent is raised when the dialog\n * is raised.\n *\n * Setting a null parent for a child window removes any parent-child\n * relationship for the child. Setting a null parent for a window which\n * currently has no parent is a no-op.\n *\n * If the parent is unmapped then its children are managed as\n * though the parent of the now-unmapped parent has become the\n * parent of this surface. If no parent exists for the now-unmapped\n * parent then the children are managed as though they have no\n * parent surface.\n */\nstatic inline void\nxdg_toplevel_set_parent(struct xdg_toplevel *xdg_toplevel, struct xdg_toplevel *parent)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_toplevel,\n\t\t\t XDG_TOPLEVEL_SET_PARENT, parent);\n}\n\n/**\n * @ingroup iface_xdg_toplevel\n *\n * Set a short title for the surface.\n *\n * This string may be used to identify the surface in a task bar,\n * window list, or other user interface elements provided by the\n * compositor.\n *\n * The string must be encoded in UTF-8.\n */\nstatic inline void\nxdg_toplevel_set_title(struct xdg_toplevel *xdg_toplevel, const char *title)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_toplevel,\n\t\t\t XDG_TOPLEVEL_SET_TITLE, title);\n}\n\n/**\n * @ingroup iface_xdg_toplevel\n *\n * Set an application identifier for the surface.\n *\n * The app ID identifies the general class of applications to which\n * the surface belongs. The compositor can use this to group multiple\n * surfaces together, or to determine how to launch a new application.\n *\n * For D-Bus activatable applications, the app ID is used as the D-Bus\n * service name.\n *\n * The compositor shell will try to group application surfaces together\n * by their app ID. As a best practice, it is suggested to select app\n * ID's that match the basename of the application's .desktop file.\n * For example, \"org.freedesktop.FooViewer\" where the .desktop file is\n * \"org.freedesktop.FooViewer.desktop\".\n *\n * Like other properties, a set_app_id request can be sent after the\n * xdg_toplevel has been mapped to update the property.\n *\n * See the desktop-entry specification [0] for more details on\n * application identifiers and how they relate to well-known D-Bus\n * names and .desktop files.\n *\n * [0] http://standards.freedesktop.org/desktop-entry-spec/\n */\nstatic inline void\nxdg_toplevel_set_app_id(struct xdg_toplevel *xdg_toplevel, const char *app_id)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_toplevel,\n\t\t\t XDG_TOPLEVEL_SET_APP_ID, app_id);\n}\n\n/**\n * @ingroup iface_xdg_toplevel\n *\n * Clients implementing client-side decorations might want to show\n * a context menu when right-clicking on the decorations, giving the\n * user a menu that they can use to maximize or minimize the window.\n *\n * This request asks the compositor to pop up such a window menu at\n * the given position, relative to the local surface coordinates of\n * the parent surface. There are no guarantees as to what menu items\n * the window menu contains.\n *\n * This request must be used in response to some sort of user action\n * like a button press, key press, or touch down event.\n */\nstatic inline void\nxdg_toplevel_show_window_menu(struct xdg_toplevel *xdg_toplevel, struct wl_seat *seat, uint32_t serial, int32_t x, int32_t y)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_toplevel,\n\t\t\t XDG_TOPLEVEL_SHOW_WINDOW_MENU, seat, serial, x, y);\n}\n\n/**\n * @ingroup iface_xdg_toplevel\n *\n * Start an interactive, user-driven move of the surface.\n *\n * This request must be used in response to some sort of user action\n * like a button press, key press, or touch down event. The passed\n * serial is used to determine the type of interactive move (touch,\n * pointer, etc).\n *\n * The server may ignore move requests depending on the state of\n * the surface (e.g. fullscreen or maximized), or if the passed serial\n * is no longer valid.\n *\n * If triggered, the surface will lose the focus of the device\n * (wl_pointer, wl_touch, etc) used for the move. It is up to the\n * compositor to visually indicate that the move is taking place, such as\n * updating a pointer cursor, during the move. There is no guarantee\n * that the device focus will return when the move is completed.\n */\nstatic inline void\nxdg_toplevel_move(struct xdg_toplevel *xdg_toplevel, struct wl_seat *seat, uint32_t serial)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_toplevel,\n\t\t\t XDG_TOPLEVEL_MOVE, seat, serial);\n}\n\n/**\n * @ingroup iface_xdg_toplevel\n *\n * Start a user-driven, interactive resize of the surface.\n *\n * This request must be used in response to some sort of user action\n * like a button press, key press, or touch down event. The passed\n * serial is used to determine the type of interactive resize (touch,\n * pointer, etc).\n *\n * The server may ignore resize requests depending on the state of\n * the surface (e.g. fullscreen or maximized).\n *\n * If triggered, the client will receive configure events with the\n * \"resize\" state enum value and the expected sizes. See the \"resize\"\n * enum value for more details about what is required. The client\n * must also acknowledge configure events using \"ack_configure\". After\n * the resize is completed, the client will receive another \"configure\"\n * event without the resize state.\n *\n * If triggered, the surface also will lose the focus of the device\n * (wl_pointer, wl_touch, etc) used for the resize. It is up to the\n * compositor to visually indicate that the resize is taking place,\n * such as updating a pointer cursor, during the resize. There is no\n * guarantee that the device focus will return when the resize is\n * completed.\n *\n * The edges parameter specifies how the surface should be resized,\n * and is one of the values of the resize_edge enum. The compositor\n * may use this information to update the surface position for\n * example when dragging the top left corner. The compositor may also\n * use this information to adapt its behavior, e.g. choose an\n * appropriate cursor image.\n */\nstatic inline void\nxdg_toplevel_resize(struct xdg_toplevel *xdg_toplevel, struct wl_seat *seat, uint32_t serial, uint32_t edges)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_toplevel,\n\t\t\t XDG_TOPLEVEL_RESIZE, seat, serial, edges);\n}\n\n/**\n * @ingroup iface_xdg_toplevel\n *\n * Set a maximum size for the window.\n *\n * The client can specify a maximum size so that the compositor does\n * not try to configure the window beyond this size.\n *\n * The width and height arguments are in window geometry coordinates.\n * See xdg_surface.set_window_geometry.\n *\n * Values set in this way are double-buffered. They will get applied\n * on the next commit.\n *\n * The compositor can use this information to allow or disallow\n * different states like maximize or fullscreen and draw accurate\n * animations.\n *\n * Similarly, a tiling window manager may use this information to\n * place and resize client windows in a more effective way.\n *\n * The client should not rely on the compositor to obey the maximum\n * size. The compositor may decide to ignore the values set by the\n * client and request a larger size.\n *\n * If never set, or a value of zero in the request, means that the\n * client has no expected maximum size in the given dimension.\n * As a result, a client wishing to reset the maximum size\n * to an unspecified state can use zero for width and height in the\n * request.\n *\n * Requesting a maximum size to be smaller than the minimum size of\n * a surface is illegal and will result in a protocol error.\n *\n * The width and height must be greater than or equal to zero. Using\n * strictly negative values for width and height will result in a\n * protocol error.\n */\nstatic inline void\nxdg_toplevel_set_max_size(struct xdg_toplevel *xdg_toplevel, int32_t width, int32_t height)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_toplevel,\n\t\t\t XDG_TOPLEVEL_SET_MAX_SIZE, width, height);\n}\n\n/**\n * @ingroup iface_xdg_toplevel\n *\n * Set a minimum size for the window.\n *\n * The client can specify a minimum size so that the compositor does\n * not try to configure the window below this size.\n *\n * The width and height arguments are in window geometry coordinates.\n * See xdg_surface.set_window_geometry.\n *\n * Values set in this way are double-buffered. They will get applied\n * on the next commit.\n *\n * The compositor can use this information to allow or disallow\n * different states like maximize or fullscreen and draw accurate\n * animations.\n *\n * Similarly, a tiling window manager may use this information to\n * place and resize client windows in a more effective way.\n *\n * The client should not rely on the compositor to obey the minimum\n * size. The compositor may decide to ignore the values set by the\n * client and request a smaller size.\n *\n * If never set, or a value of zero in the request, means that the\n * client has no expected minimum size in the given dimension.\n * As a result, a client wishing to reset the minimum size\n * to an unspecified state can use zero for width and height in the\n * request.\n *\n * Requesting a minimum size to be larger than the maximum size of\n * a surface is illegal and will result in a protocol error.\n *\n * The width and height must be greater than or equal to zero. Using\n * strictly negative values for width and height will result in a\n * protocol error.\n */\nstatic inline void\nxdg_toplevel_set_min_size(struct xdg_toplevel *xdg_toplevel, int32_t width, int32_t height)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_toplevel,\n\t\t\t XDG_TOPLEVEL_SET_MIN_SIZE, width, height);\n}\n\n/**\n * @ingroup iface_xdg_toplevel\n *\n * Maximize the surface.\n *\n * After requesting that the surface should be maximized, the compositor\n * will respond by emitting a configure event. Whether this configure\n * actually sets the window maximized is subject to compositor policies.\n * The client must then update its content, drawing in the configured\n * state. The client must also acknowledge the configure when committing\n * the new content (see ack_configure).\n *\n * It is up to the compositor to decide how and where to maximize the\n * surface, for example which output and what region of the screen should\n * be used.\n *\n * If the surface was already maximized, the compositor will still emit\n * a configure event with the \"maximized\" state.\n *\n * If the surface is in a fullscreen state, this request has no direct\n * effect. It may alter the state the surface is returned to when\n * unmaximized unless overridden by the compositor.\n */\nstatic inline void\nxdg_toplevel_set_maximized(struct xdg_toplevel *xdg_toplevel)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_toplevel,\n\t\t\t XDG_TOPLEVEL_SET_MAXIMIZED);\n}\n\n/**\n * @ingroup iface_xdg_toplevel\n *\n * Unmaximize the surface.\n *\n * After requesting that the surface should be unmaximized, the compositor\n * will respond by emitting a configure event. Whether this actually\n * un-maximizes the window is subject to compositor policies.\n * If available and applicable, the compositor will include the window\n * geometry dimensions the window had prior to being maximized in the\n * configure event. The client must then update its content, drawing it in\n * the configured state. The client must also acknowledge the configure\n * when committing the new content (see ack_configure).\n *\n * It is up to the compositor to position the surface after it was\n * unmaximized; usually the position the surface had before maximizing, if\n * applicable.\n *\n * If the surface was already not maximized, the compositor will still\n * emit a configure event without the \"maximized\" state.\n *\n * If the surface is in a fullscreen state, this request has no direct\n * effect. It may alter the state the surface is returned to when\n * unmaximized unless overridden by the compositor.\n */\nstatic inline void\nxdg_toplevel_unset_maximized(struct xdg_toplevel *xdg_toplevel)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_toplevel,\n\t\t\t XDG_TOPLEVEL_UNSET_MAXIMIZED);\n}\n\n/**\n * @ingroup iface_xdg_toplevel\n *\n * Make the surface fullscreen.\n *\n * After requesting that the surface should be fullscreened, the\n * compositor will respond by emitting a configure event. Whether the\n * client is actually put into a fullscreen state is subject to compositor\n * policies. The client must also acknowledge the configure when\n * committing the new content (see ack_configure).\n *\n * The output passed by the request indicates the client's preference as\n * to which display it should be set fullscreen on. If this value is NULL,\n * it's up to the compositor to choose which display will be used to map\n * this surface.\n *\n * If the surface doesn't cover the whole output, the compositor will\n * position the surface in the center of the output and compensate with\n * with border fill covering the rest of the output. The content of the\n * border fill is undefined, but should be assumed to be in some way that\n * attempts to blend into the surrounding area (e.g. solid black).\n *\n * If the fullscreened surface is not opaque, the compositor must make\n * sure that other screen content not part of the same surface tree (made\n * up of subsurfaces, popups or similarly coupled surfaces) are not\n * visible below the fullscreened surface.\n */\nstatic inline void\nxdg_toplevel_set_fullscreen(struct xdg_toplevel *xdg_toplevel, struct wl_output *output)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_toplevel,\n\t\t\t XDG_TOPLEVEL_SET_FULLSCREEN, output);\n}\n\n/**\n * @ingroup iface_xdg_toplevel\n *\n * Make the surface no longer fullscreen.\n *\n * After requesting that the surface should be unfullscreened, the\n * compositor will respond by emitting a configure event.\n * Whether this actually removes the fullscreen state of the client is\n * subject to compositor policies.\n *\n * Making a surface unfullscreen sets states for the surface based on the following:\n * * the state(s) it may have had before becoming fullscreen\n * * any state(s) decided by the compositor\n * * any state(s) requested by the client while the surface was fullscreen\n *\n * The compositor may include the previous window geometry dimensions in\n * the configure event, if applicable.\n *\n * The client must also acknowledge the configure when committing the new\n * content (see ack_configure).\n */\nstatic inline void\nxdg_toplevel_unset_fullscreen(struct xdg_toplevel *xdg_toplevel)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_toplevel,\n\t\t\t XDG_TOPLEVEL_UNSET_FULLSCREEN);\n}\n\n/**\n * @ingroup iface_xdg_toplevel\n *\n * Request that the compositor minimize your surface. There is no\n * way to know if the surface is currently minimized, nor is there\n * any way to unset minimization on this surface.\n *\n * If you are looking to throttle redrawing when minimized, please\n * instead use the wl_surface.frame event for this, as this will\n * also work with live previews on windows in Alt-Tab, Expose or\n * similar compositor features.\n */\nstatic inline void\nxdg_toplevel_set_minimized(struct xdg_toplevel *xdg_toplevel)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_toplevel,\n\t\t\t XDG_TOPLEVEL_SET_MINIMIZED);\n}\n\n#ifndef XDG_POPUP_ERROR_ENUM\n#define XDG_POPUP_ERROR_ENUM\nenum xdg_popup_error {\n\t/**\n\t * tried to grab after being mapped\n\t */\n\tXDG_POPUP_ERROR_INVALID_GRAB = 0,\n};\n#endif /* XDG_POPUP_ERROR_ENUM */\n\n/**\n * @ingroup iface_xdg_popup\n * @struct xdg_popup_listener\n */\nstruct xdg_popup_listener {\n\t/**\n\t * configure the popup surface\n\t *\n\t * This event asks the popup surface to configure itself given\n\t * the configuration. The configured state should not be applied\n\t * immediately. See xdg_surface.configure for details.\n\t *\n\t * The x and y arguments represent the position the popup was\n\t * placed at given the xdg_positioner rule, relative to the upper\n\t * left corner of the window geometry of the parent surface.\n\t *\n\t * For version 2 or older, the configure event for an xdg_popup is\n\t * only ever sent once for the initial configuration. Starting with\n\t * version 3, it may be sent again if the popup is setup with an\n\t * xdg_positioner with set_reactive requested, or in response to\n\t * xdg_popup.reposition requests.\n\t * @param x x position relative to parent surface window geometry\n\t * @param y y position relative to parent surface window geometry\n\t * @param width window geometry width\n\t * @param height window geometry height\n\t */\n\tvoid (*configure)(void *data,\n\t\t\t struct xdg_popup *xdg_popup,\n\t\t\t int32_t x,\n\t\t\t int32_t y,\n\t\t\t int32_t width,\n\t\t\t int32_t height);\n\t/**\n\t * popup interaction is done\n\t *\n\t * The popup_done event is sent out when a popup is dismissed by\n\t * the compositor. The client should destroy the xdg_popup object\n\t * at this point.\n\t */\n\tvoid (*popup_done)(void *data,\n\t\t\t struct xdg_popup *xdg_popup);\n\t/**\n\t * signal the completion of a repositioned request\n\t *\n\t * The repositioned event is sent as part of a popup\n\t * configuration sequence, together with xdg_popup.configure and\n\t * lastly xdg_surface.configure to notify the completion of a\n\t * reposition request.\n\t *\n\t * The repositioned event is to notify about the completion of a\n\t * xdg_popup.reposition request. The token argument is the token\n\t * passed in the xdg_popup.reposition request.\n\t *\n\t * Immediately after this event is emitted, xdg_popup.configure and\n\t * xdg_surface.configure will be sent with the updated size and\n\t * position, as well as a new configure serial.\n\t *\n\t * The client should optionally update the content of the popup,\n\t * but must acknowledge the new popup configuration for the new\n\t * position to take effect. See xdg_surface.ack_configure for\n\t * details.\n\t * @param token reposition request token\n\t * @since 3\n\t */\n\tvoid (*repositioned)(void *data,\n\t\t\t struct xdg_popup *xdg_popup,\n\t\t\t uint32_t token);\n};\n\n/**\n * @ingroup iface_xdg_popup\n */\nstatic inline int\nxdg_popup_add_listener(struct xdg_popup *xdg_popup,\n\t\t const struct xdg_popup_listener *listener, void *data)\n{\n\treturn wl_proxy_add_listener((struct wl_proxy *) xdg_popup,\n\t\t\t\t (void (**)(void)) listener, data);\n}\n\n#define XDG_POPUP_DESTROY 0\n#define XDG_POPUP_GRAB 1\n#define XDG_POPUP_REPOSITION 2\n\n/**\n * @ingroup iface_xdg_popup\n */\n#define XDG_POPUP_CONFIGURE_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_popup\n */\n#define XDG_POPUP_POPUP_DONE_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_popup\n */\n#define XDG_POPUP_REPOSITIONED_SINCE_VERSION 3\n\n/**\n * @ingroup iface_xdg_popup\n */\n#define XDG_POPUP_DESTROY_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_popup\n */\n#define XDG_POPUP_GRAB_SINCE_VERSION 1\n/**\n * @ingroup iface_xdg_popup\n */\n#define XDG_POPUP_REPOSITION_SINCE_VERSION 3\n\n/** @ingroup iface_xdg_popup */\nstatic inline void\nxdg_popup_set_user_data(struct xdg_popup *xdg_popup, void *user_data)\n{\n\twl_proxy_set_user_data((struct wl_proxy *) xdg_popup, user_data);\n}\n\n/** @ingroup iface_xdg_popup */\nstatic inline void *\nxdg_popup_get_user_data(struct xdg_popup *xdg_popup)\n{\n\treturn wl_proxy_get_user_data((struct wl_proxy *) xdg_popup);\n}\n\nstatic inline uint32_t\nxdg_popup_get_version(struct xdg_popup *xdg_popup)\n{\n\treturn wl_proxy_get_version((struct wl_proxy *) xdg_popup);\n}\n\n/**\n * @ingroup iface_xdg_popup\n *\n * This destroys the popup. Explicitly destroying the xdg_popup\n * object will also dismiss the popup, and unmap the surface.\n *\n * If this xdg_popup is not the \"topmost\" popup, a protocol error\n * will be sent.\n */\nstatic inline void\nxdg_popup_destroy(struct xdg_popup *xdg_popup)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_popup,\n\t\t\t XDG_POPUP_DESTROY);\n\n\twl_proxy_destroy((struct wl_proxy *) xdg_popup);\n}\n\n/**\n * @ingroup iface_xdg_popup\n *\n * This request makes the created popup take an explicit grab. An explicit\n * grab will be dismissed when the user dismisses the popup, or when the\n * client destroys the xdg_popup. This can be done by the user clicking\n * outside the surface, using the keyboard, or even locking the screen\n * through closing the lid or a timeout.\n *\n * If the compositor denies the grab, the popup will be immediately\n * dismissed.\n *\n * This request must be used in response to some sort of user action like a\n * button press, key press, or touch down event. The serial number of the\n * event should be passed as 'serial'.\n *\n * The parent of a grabbing popup must either be an xdg_toplevel surface or\n * another xdg_popup with an explicit grab. If the parent is another\n * xdg_popup it means that the popups are nested, with this popup now being\n * the topmost popup.\n *\n * Nested popups must be destroyed in the reverse order they were created\n * in, e.g. the only popup you are allowed to destroy at all times is the\n * topmost one.\n *\n * When compositors choose to dismiss a popup, they may dismiss every\n * nested grabbing popup as well. When a compositor dismisses popups, it\n * will follow the same dismissing order as required from the client.\n *\n * The parent of a grabbing popup must either be another xdg_popup with an\n * active explicit grab, or an xdg_popup or xdg_toplevel, if there are no\n * explicit grabs already taken.\n *\n * If the topmost grabbing popup is destroyed, the grab will be returned to\n * the parent of the popup, if that parent previously had an explicit grab.\n *\n * If the parent is a grabbing popup which has already been dismissed, this\n * popup will be immediately dismissed. If the parent is a popup that did\n * not take an explicit grab, an error will be raised.\n *\n * During a popup grab, the client owning the grab will receive pointer\n * and touch events for all their surfaces as normal (similar to an\n * \"owner-events\" grab in X11 parlance), while the top most grabbing popup\n * will always have keyboard focus.\n */\nstatic inline void\nxdg_popup_grab(struct xdg_popup *xdg_popup, struct wl_seat *seat, uint32_t serial)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_popup,\n\t\t\t XDG_POPUP_GRAB, seat, serial);\n}\n\n/**\n * @ingroup iface_xdg_popup\n *\n * Reposition an already-mapped popup. The popup will be placed given the\n * details in the passed xdg_positioner object, and a\n * xdg_popup.repositioned followed by xdg_popup.configure and\n * xdg_surface.configure will be emitted in response. Any parameters set\n * by the previous positioner will be discarded.\n *\n * The passed token will be sent in the corresponding\n * xdg_popup.repositioned event. The new popup position will not take\n * effect until the corresponding configure event is acknowledged by the\n * client. See xdg_popup.repositioned for details. The token itself is\n * opaque, and has no other special meaning.\n *\n * If multiple reposition requests are sent, the compositor may skip all\n * but the last one.\n *\n * If the popup is repositioned in response to a configure event for its\n * parent, the client should send an xdg_positioner.set_parent_configure\n * and possibly an xdg_positioner.set_parent_size request to allow the\n * compositor to properly constrain the popup.\n *\n * If the popup is repositioned together with a parent that is being\n * resized, but not in response to a configure event, the client should\n * send an xdg_positioner.set_parent_size request.\n */\nstatic inline void\nxdg_popup_reposition(struct xdg_popup *xdg_popup, struct xdg_positioner *positioner, uint32_t token)\n{\n\twl_proxy_marshal((struct wl_proxy *) xdg_popup,\n\t\t\t XDG_POPUP_REPOSITION, positioner, token);\n}\n\n#ifdef __cplusplus\n}\n#endif\n\n#endif\n"
},
{
"path": "vendor/gioui.org/app/window.go",
"content": "// SPDX-License-Identifier: Unlicense OR MIT\n\npackage app\n\nimport (\n\t\"errors\"\n\t\"fmt\"\n\t\"image\"\n\t\"image/color\"\n\t\"runtime\"\n\t\"time\"\n\n\t\"gioui.org/f32\"\n\t\"gioui.org/gpu\"\n\t\"gioui.org/io/event\"\n\t\"gioui.org/io/pointer\"\n\t\"gioui.org/io/profile\"\n\t\"gioui.org/io/router\"\n\t\"gioui.org/io/system\"\n\t\"gioui.org/op\"\n\t\"gioui.org/unit\"\n\n\t_ \"gioui.org/app/internal/log\"\n)\n\n// Option configures a window.\ntype Option func(unit.Metric, *Config)\n\n// Window represents an operating system window.\ntype Window struct {\n\tctx context\n\tgpu gpu.GPU\n\n\t// driverFuncs is a channel of functions to run when\n\t// the Window has a valid driver.\n\tdriverFuncs chan func(d driver)\n\t// wakeups wakes up the native event loop to send a\n\t// WakeupEvent that flushes driverFuncs.\n\twakeups chan struct{}\n\t// wakeupFuncs is sent wakeup functions when the driver changes.\n\twakeupFuncs chan func()\n\t// redraws is notified when a redraw is requested by the client.\n\tredraws chan struct{}\n\t// immediateRedraws is like redraw but doesn't need a wakeup.\n\timmediateRedraws chan struct{}\n\t// scheduledRedraws is sent the most recent delayed redraw time.\n\tscheduledRedraws chan time.Time\n\n\tout chan event.Event\n\tframes chan *op.Ops\n\tframeAck chan struct{}\n\t// dead is closed when the window is destroyed.\n\tdead chan struct{}\n\n\tstage system.Stage\n\tanimating bool\n\thasNextFrame bool\n\tnextFrame time.Time\n\tdelayedDraw *time.Timer\n\n\tqueue queue\n\tcursor pointer.CursorName\n\n\tcallbacks callbacks\n\n\tnocontext bool\n\n\t// semantic data, lazily evaluated if requested by a backend to speed up\n\t// the cases where semantic data is not needed.\n\tsemantic struct {\n\t\t// uptodate tracks whether the fields below are up to date.\n\t\tuptodate bool\n\t\troot router.SemanticID\n\t\tprevTree []router.SemanticNode\n\t\ttree []router.SemanticNode\n\t\tids map[router.SemanticID]router.SemanticNode\n\t}\n}\n\ntype semanticResult struct {\n\tfound bool\n\tnode router.SemanticNode\n}\n\ntype callbacks struct {\n\tw *Window\n\td driver\n}\n\n// queue is an event.Queue implementation that distributes system events\n// to the input handlers declared in the most recent frame.\ntype queue struct {\n\tq router.Router\n}\n\n// Pre-allocate the ack event to avoid garbage.\nvar ackEvent event.Event\n\n// NewWindow creates a new window for a set of window\n// options. The options are hints; the platform is free to\n// ignore or adjust them.\n//\n// If the current program is running on iOS or Android,\n// NewWindow returns the window previously created by the\n// platform.\n//\n// Calling NewWindow more than once is not supported on\n// iOS, Android, WebAssembly.\nfunc NewWindow(options ...Option) *Window {\n\tdefaultOptions := []Option{\n\t\tSize(unit.Dp(800), unit.Dp(600)),\n\t\tTitle(\"Gio\"),\n\t}\n\toptions = append(defaultOptions, options...)\n\tvar cnf Config\n\tcnf.apply(unit.Metric{}, options)\n\n\tw := &Window{\n\t\tout: make(chan event.Event),\n\t\timmediateRedraws: make(chan struct{}, 0),\n\t\tredraws: make(chan struct{}, 1),\n\t\tscheduledRedraws: make(chan time.Time, 1),\n\t\tframes: make(chan *op.Ops),\n\t\tframeAck: make(chan struct{}),\n\t\tdriverFuncs: make(chan func(d driver), 1),\n\t\twakeups: make(chan struct{}, 1),\n\t\twakeupFuncs: make(chan func()),\n\t\tdead: make(chan struct{}),\n\t\tnocontext: cnf.CustomRenderer,\n\t}\n\tw.semantic.ids = make(map[router.SemanticID]router.SemanticNode)\n\tw.callbacks.w = w\n\tgo w.run(options)\n\treturn w\n}\n\n// Events returns the channel where events are delivered.\nfunc (w *Window) Events() <-chan event.Event {\n\treturn w.out\n}\n\n// update updates the window contents, input operations declare input handlers,\n// and so on. The supplied operations list completely replaces the window state\n// from previous calls.\nfunc (w *Window) update(frame *op.Ops) {\n\tw.frames <- frame\n\t<-w.frameAck\n}\n\nfunc (w *Window) validateAndProcess(d driver, frameStart time.Time, size image.Point, sync bool, frame *op.Ops) error {\n\tfor {\n\t\tif w.gpu == nil && !w.nocontext {\n\t\t\tvar err error\n\t\t\tif w.ctx == nil {\n\t\t\t\tw.ctx, err = d.NewContext()\n\t\t\t\tif err != nil {\n\t\t\t\t\treturn err\n\t\t\t\t}\n\t\t\t\tsync = true\n\t\t\t}\n\t\t}\n\t\tif sync && w.ctx != nil {\n\t\t\tif err := w.ctx.Refresh(); err != nil {\n\t\t\t\tif errors.Is(err, errOutOfDate) {\n\t\t\t\t\t// Surface couldn't be created for transient reasons. Skip\n\t\t\t\t\t// this frame and wait for the next.\n\t\t\t\t\treturn nil\n\t\t\t\t}\n\t\t\t\tw.destroyGPU()\n\t\t\t\tif errors.Is(err, gpu.ErrDeviceLost) {\n\t\t\t\t\tcontinue\n\t\t\t\t}\n\t\t\t\treturn err\n\t\t\t}\n\t\t}\n\t\tif w.gpu == nil && !w.nocontext {\n\t\t\tif err := w.ctx.Lock(); err != nil {\n\t\t\t\tw.destroyGPU()\n\t\t\t\treturn err\n\t\t\t}\n\t\t\tgpu, err := gpu.New(w.ctx.API())\n\t\t\tw.ctx.Unlock()\n\t\t\tif err != nil {\n\t\t\t\tw.destroyGPU()\n\t\t\t\treturn err\n\t\t\t}\n\t\t\tw.gpu = gpu\n\t\t}\n\t\tif w.gpu != nil {\n\t\t\tif err := w.render(frame, size); err != nil {\n\t\t\t\tif errors.Is(err, errOutOfDate) {\n\t\t\t\t\t// GPU surface needs refreshing.\n\t\t\t\t\tsync = true\n\t\t\t\t\tcontinue\n\t\t\t\t}\n\t\t\t\tw.destroyGPU()\n\t\t\t\tif errors.Is(err, gpu.ErrDeviceLost) {\n\t\t\t\t\tcontinue\n\t\t\t\t}\n\t\t\t\treturn err\n\t\t\t}\n\t\t}\n\t\tw.processFrame(d, frameStart, frame)\n\t\treturn nil\n\t}\n}\n\nfunc (w *Window) render(frame *op.Ops, viewport image.Point) error {\n\tif err := w.ctx.Lock(); err != nil {\n\t\treturn err\n\t}\n\tdefer w.ctx.Unlock()\n\tif runtime.GOOS == \"js\" {\n\t\t// Use transparent black when Gio is embedded, to allow mixing of Gio and\n\t\t// foreign content below.\n\t\tw.gpu.Clear(color.NRGBA{A: 0x00, R: 0x00, G: 0x00, B: 0x00})\n\t} else {\n\t\tw.gpu.Clear(color.NRGBA{A: 0xff, R: 0xff, G: 0xff, B: 0xff})\n\t}\n\ttarget, err := w.ctx.RenderTarget()\n\tif err != nil {\n\t\treturn err\n\t}\n\tif err := w.gpu.Frame(frame, target, viewport); err != nil {\n\t\treturn err\n\t}\n\treturn w.ctx.Present()\n}\n\nfunc (w *Window) processFrame(d driver, frameStart time.Time, frame *op.Ops) {\n\tw.queue.q.Frame(frame)\n\tfor k := range w.semantic.ids {\n\t\tdelete(w.semantic.ids, k)\n\t}\n\tw.semantic.uptodate = false\n\tswitch w.queue.q.TextInputState() {\n\tcase router.TextInputOpen:\n\t\td.ShowTextInput(true)\n\tcase router.TextInputClose:\n\t\td.ShowTextInput(false)\n\t}\n\tif hint, ok := w.queue.q.TextInputHint(); ok {\n\t\td.SetInputHint(hint)\n\t}\n\tif txt, ok := w.queue.q.WriteClipboard(); ok {\n\t\tw.WriteClipboard(txt)\n\t}\n\tif w.queue.q.ReadClipboard() {\n\t\tw.ReadClipboard()\n\t}\n\tif w.queue.q.Profiling() && w.gpu != nil {\n\t\tframeDur := time.Since(frameStart)\n\t\tframeDur = frameDur.Truncate(100 * time.Microsecond)\n\t\tq := 100 * time.Microsecond\n\t\ttimings := fmt.Sprintf(\"tot:%7s %s\", frameDur.Round(q), w.gpu.Profile())\n\t\tw.queue.q.Queue(profile.Event{Timings: timings})\n\t}\n\tif t, ok := w.queue.q.WakeupTime(); ok {\n\t\tw.setNextFrame(t)\n\t}\n\tw.updateAnimation(d)\n}\n\n// Invalidate the window such that a FrameEvent will be generated immediately.\n// If the window is inactive, the event is sent when the window becomes active.\n//\n// Note that Invalidate is intended for externally triggered updates, such as a\n// response from a network request. InvalidateOp is more efficient for animation\n// and similar internal updates.\n//\n// Invalidate is safe for concurrent use.\nfunc (w *Window) Invalidate() {\n\tselect {\n\tcase w.immediateRedraws <- struct{}{}:\n\t\treturn\n\tdefault:\n\t}\n\tselect {\n\tcase w.redraws <- struct{}{}:\n\t\tw.wakeup()\n\tdefault:\n\t}\n}\n\n// Option applies the options to the window.\nfunc (w *Window) Option(opts ...Option) {\n\tw.driverDefer(func(d driver) {\n\t\td.Configure(opts)\n\t})\n}\n\n// ReadClipboard initiates a read of the clipboard in the form\n// of a clipboard.Event. Multiple reads may be coalesced\n// to a single event.\nfunc (w *Window) ReadClipboard() {\n\tw.driverDefer(func(d driver) {\n\t\td.ReadClipboard()\n\t})\n}\n\n// WriteClipboard writes a string to the clipboard.\nfunc (w *Window) WriteClipboard(s string) {\n\tw.driverDefer(func(d driver) {\n\t\td.WriteClipboard(s)\n\t})\n}\n\n// SetCursorName changes the current window cursor to name.\nfunc (w *Window) SetCursorName(name pointer.CursorName) {\n\tw.driverDefer(func(d driver) {\n\t\td.SetCursor(name)\n\t})\n}\n\n// Close the window. The window's event loop should exit when it receives\n// system.DestroyEvent.\n//\n// Currently, only macOS, Windows, X11 and Wayland drivers implement this functionality,\n// all others are stubbed.\nfunc (w *Window) Close() {\n\tw.driverDefer(func(d driver) {\n\t\td.Close()\n\t})\n}\n\n// Maximize the window.\n// Note: only implemented on Windows, macOS and X11.\nfunc (w *Window) Maximize() {\n\tw.driverDefer(func(d driver) {\n\t\td.Maximize()\n\t})\n}\n\n// Center the window.\n// Note: only implemented on Windows, macOS and X11.\nfunc (w *Window) Center() {\n\tw.driverDefer(func(d driver) {\n\t\td.Center()\n\t})\n}\n\n// Run f in the same thread as the native window event loop, and wait for f to\n// return or the window to close. Run is guaranteed not to deadlock if it is\n// invoked during the handling of a ViewEvent, system.FrameEvent,\n// system.StageEvent; call Run in a separate goroutine to avoid deadlock in all\n// other cases.\n//\n// Note that most programs should not call Run; configuring a Window with\n// CustomRenderer is a notable exception.\nfunc (w *Window) Run(f func()) {\n\tdone := make(chan struct{})\n\tw.driverDefer(func(d driver) {\n\t\tdefer close(done)\n\t\tf()\n\t})\n\tselect {\n\tcase <-done:\n\tcase <-w.dead:\n\t}\n}\n\n// driverDefer is like Run but can be run from any context. It doesn't wait\n// for f to return.\nfunc (w *Window) driverDefer(f func(d driver)) {\n\tselect {\n\tcase w.driverFuncs <- f:\n\t\tw.wakeup()\n\tcase <-w.dead:\n\t}\n}\n\nfunc (w *Window) updateAnimation(d driver) {\n\tanimate := false\n\tif w.stage >= system.StageRunning && w.hasNextFrame {\n\t\tif dt := time.Until(w.nextFrame); dt <= 0 {\n\t\t\tanimate = true\n\t\t} else {\n\t\t\t// Schedule redraw.\n\t\t\tselect {\n\t\t\tcase <-w.scheduledRedraws:\n\t\t\tdefault:\n\t\t\t}\n\t\t\tw.scheduledRedraws <- w.nextFrame\n\t\t}\n\t}\n\tif animate != w.animating {\n\t\tw.animating = animate\n\t\td.SetAnimating(animate)\n\t}\n}\n\nfunc (w *Window) wakeup() {\n\tselect {\n\tcase w.wakeups <- struct{}{}:\n\tdefault:\n\t}\n}\n\nfunc (w *Window) setNextFrame(at time.Time) {\n\tif !w.hasNextFrame || at.Before(w.nextFrame) {\n\t\tw.hasNextFrame = true\n\t\tw.nextFrame = at\n\t}\n}\n\nfunc (c *callbacks) SetDriver(d driver) {\n\tc.d = d\n\tvar wakeup func()\n\tif d != nil {\n\t\twakeup = d.Wakeup\n\t}\n\tc.w.wakeupFuncs <- wakeup\n}\n\nfunc (c *callbacks) Event(e event.Event) {\n\tif c.d == nil {\n\t\tpanic(\"event while no driver active\")\n\t}\n\tc.w.processEvent(c.d, e)\n\tc.w.updateState(c.d)\n}\n\n// SemanticRoot returns the ID of the semantic root.\nfunc (c *callbacks) SemanticRoot() router.SemanticID {\n\tc.w.updateSemantics()\n\treturn c.w.semantic.root\n}\n\n// LookupSemantic looks up a semantic node from an ID. The zero ID denotes the root.\nfunc (c *callbacks) LookupSemantic(semID router.SemanticID) (router.SemanticNode, bool) {\n\tc.w.updateSemantics()\n\tn, found := c.w.semantic.ids[semID]\n\treturn n, found\n}\n\nfunc (c *callbacks) AppendSemanticDiffs(diffs []router.SemanticID) []router.SemanticID {\n\tc.w.updateSemantics()\n\tif tree := c.w.semantic.prevTree; len(tree) > 0 {\n\t\tc.w.collectSemanticDiffs(&diffs, c.w.semantic.prevTree[0])\n\t}\n\treturn diffs\n}\n\nfunc (c *callbacks) SemanticAt(pos f32.Point) (router.SemanticID, bool) {\n\tc.w.updateSemantics()\n\treturn c.w.queue.q.SemanticAt(pos)\n}\n\nfunc (w *Window) waitAck(d driver) {\n\tfor {\n\t\tselect {\n\t\tcase f := <-w.driverFuncs:\n\t\t\tf(d)\n\t\tcase w.out <- ackEvent:\n\t\t\t// A dummy event went through, so we know the application has processed the previous event.\n\t\t\treturn\n\t\tcase <-w.immediateRedraws:\n\t\t\t// Invalidate was called during frame processing.\n\t\t\tw.setNextFrame(time.Time{})\n\t\t}\n\t}\n}\n\nfunc (w *Window) destroyGPU() {\n\tif w.gpu != nil {\n\t\tw.ctx.Lock()\n\t\tw.gpu.Release()\n\t\tw.ctx.Unlock()\n\t\tw.gpu = nil\n\t}\n\tif w.ctx != nil {\n\t\tw.ctx.Release()\n\t\tw.ctx = nil\n\t}\n}\n\n// waitFrame waits for the client to either call FrameEvent.Frame\n// or to continue event handling. It returns whether the client\n// called Frame or not.\nfunc (w *Window) waitFrame(d driver) (*op.Ops, bool) {\n\tfor {\n\t\tselect {\n\t\tcase f := <-w.driverFuncs:\n\t\t\tf(d)\n\t\tcase frame := <-w.frames:\n\t\t\t// The client called FrameEvent.Frame.\n\t\t\treturn frame, true\n\t\tcase w.out <- ackEvent:\n\t\t\t// The client ignored FrameEvent and continued processing\n\t\t\t// events.\n\t\t\treturn nil, false\n\t\tcase <-w.immediateRedraws:\n\t\t\t// Invalidate was called during frame processing.\n\t\t\tw.setNextFrame(time.Time{})\n\t\t}\n\t}\n}\n\n// updateSemantics refreshes the semantics tree, the id to node map and the ids of\n// updated nodes.\nfunc (w *Window) updateSemantics() {\n\tif w.semantic.uptodate {\n\t\treturn\n\t}\n\tw.semantic.uptodate = true\n\tw.semantic.prevTree, w.semantic.tree = w.semantic.tree, w.semantic.prevTree\n\tw.semantic.tree = w.queue.q.AppendSemantics(w.semantic.tree[:0])\n\tw.semantic.root = w.semantic.tree[0].ID\n\tfor _, n := range w.semantic.tree {\n\t\tw.semantic.ids[n.ID] = n\n\t}\n}\n\n// collectSemanticDiffs traverses the previous semantic tree, noting changed nodes.\nfunc (w *Window) collectSemanticDiffs(diffs *[]router.SemanticID, n router.SemanticNode) {\n\tnewNode, exists := w.semantic.ids[n.ID]\n\t// Ignore deleted nodes, as their disappearance will be reported through an\n\t// ancestor node.\n\tif !exists {\n\t\treturn\n\t}\n\tdiff := newNode.Desc != n.Desc || len(n.Children) != len(newNode.Children)\n\tfor i, ch := range n.Children {\n\t\tif !diff {\n\t\t\tnewCh := newNode.Children[i]\n\t\t\tdiff = ch.ID != newCh.ID\n\t\t}\n\t\tw.collectSemanticDiffs(diffs, ch)\n\t}\n\tif diff {\n\t\t*diffs = append(*diffs, n.ID)\n\t}\n}\n\nfunc (w *Window) updateState(d driver) {\n\tfor {\n\t\tselect {\n\t\tcase f := <-w.driverFuncs:\n\t\t\tf(d)\n\t\tcase <-w.redraws:\n\t\t\tw.setNextFrame(time.Time{})\n\t\t\tw.updateAnimation(d)\n\t\tdefault:\n\t\t\treturn\n\t\t}\n\t}\n}\n\nfunc (w *Window) processEvent(d driver, e event.Event) {\n\tselect {\n\tcase <-w.dead:\n\t\treturn\n\tdefault:\n\t}\n\tswitch e2 := e.(type) {\n\tcase system.StageEvent:\n\t\tif e2.Stage < system.StageRunning {\n\t\t\tif w.gpu != nil {\n\t\t\t\tw.ctx.Lock()\n\t\t\t\tw.gpu.Release()\n\t\t\t\tw.gpu = nil\n\t\t\t\tw.ctx.Unlock()\n\t\t\t}\n\t\t}\n\t\tw.stage = e2.Stage\n\t\tw.updateAnimation(d)\n\t\tw.out <- e\n\t\tw.waitAck(d)\n\tcase frameEvent:\n\t\tif e2.Size == (image.Point{}) {\n\t\t\tpanic(errors.New(\"internal error: zero-sized Draw\"))\n\t\t}\n\t\tif w.stage < system.StageRunning {\n\t\t\t// No drawing if not visible.\n\t\t\tbreak\n\t\t}\n\t\tframeStart := time.Now()\n\t\tw.hasNextFrame = false\n\t\te2.Frame = w.update\n\t\te2.Queue = &w.queue\n\t\tw.out <- e2.FrameEvent\n\t\tframe, gotFrame := w.waitFrame(d)\n\t\terr := w.validateAndProcess(d, frameStart, e2.Size, e2.Sync, frame)\n\t\tif gotFrame {\n\t\t\t// We're done with frame, let the client continue.\n\t\t\tw.frameAck <- struct{}{}\n\t\t}\n\t\tif err != nil {\n\t\t\tw.destroyGPU()\n\t\t\tw.out <- system.DestroyEvent{Err: err}\n\t\t\tclose(w.dead)\n\t\t\tclose(w.out)\n\t\t\tbreak\n\t\t}\n\t\tw.updateCursor()\n\tcase *system.CommandEvent:\n\t\tw.out <- e\n\t\tw.waitAck(d)\n\tcase system.DestroyEvent:\n\t\tw.destroyGPU()\n\t\tw.out <- e2\n\t\tclose(w.dead)\n\t\tclose(w.out)\n\tcase ViewEvent:\n\t\tw.out <- e2\n\t\tw.waitAck(d)\n\tcase wakeupEvent:\n\tcase event.Event:\n\t\tif w.queue.q.Queue(e2) {\n\t\t\tw.setNextFrame(time.Time{})\n\t\t\tw.updateAnimation(d)\n\t\t}\n\t\tw.updateCursor()\n\t\tw.out <- e\n\t}\n}\n\nfunc (w *Window) run(options []Option) {\n\tif err := newWindow(&w.callbacks, options); err != nil {\n\t\tw.out <- system.DestroyEvent{Err: err}\n\t\tclose(w.dead)\n\t\tclose(w.out)\n\t\treturn\n\t}\n\tvar wakeup func()\n\tvar timer *time.Timer\n\tfor {\n\t\tvar (\n\t\t\twakeups <-chan struct{}\n\t\t\ttimeC <-chan time.Time\n\t\t)\n\t\tif wakeup != nil {\n\t\t\twakeups = w.wakeups\n\t\t\tif timer != nil {\n\t\t\t\ttimeC = timer.C\n\t\t\t}\n\t\t}\n\t\tselect {\n\t\tcase t := <-w.scheduledRedraws:\n\t\t\tif timer != nil {\n\t\t\t\ttimer.Stop()\n\t\t\t}\n\t\t\ttimer = time.NewTimer(time.Until(t))\n\t\tcase <-w.dead:\n\t\t\treturn\n\t\tcase <-timeC:\n\t\t\tselect {\n\t\t\tcase w.redraws <- struct{}{}:\n\t\t\t\twakeup()\n\t\t\tdefault:\n\t\t\t}\n\t\tcase <-wakeups:\n\t\t\twakeup()\n\t\tcase wakeup = <-w.wakeupFuncs:\n\t\t}\n\t}\n}\n\nfunc (w *Window) updateCursor() {\n\tif c := w.queue.q.Cursor(); c != w.cursor {\n\t\tw.cursor = c\n\t\tw.SetCursorName(c)\n\t}\n}\n\n// Raise requests that the platform bring this window to the top of all open windows.\n// Some platforms do not allow this except under certain circumstances, such as when\n// a window from the same application already has focus. If the platform does not\n// support it, this method will do nothing.\nfunc (w *Window) Raise() {\n\tw.driverDefer(func(d driver) {\n\t\td.Raise()\n\t})\n}\n\nfunc (q *queue) Events(k event.Tag) []event.Event {\n\treturn q.q.Events(k)\n}\n\n// Title sets the title of the window.\nfunc Title(t string) Option {\n\treturn func(_ unit.Metric, cnf *Config) {\n\t\tcnf.Title = t\n\t}\n}\n\n// Size sets the size of the window. The option is ignored\n// in Fullscreen mode.\nfunc Size(w, h unit.Value) Option {\n\tif w.V <= 0 {\n\t\tpanic(\"width must be larger than or equal to 0\")\n\t}\n\tif h.V <= 0 {\n\t\tpanic(\"height must be larger than or equal to 0\")\n\t}\n\treturn func(m unit.Metric, cnf *Config) {\n\t\tcnf.Size = image.Point{\n\t\t\tX: m.Px(w),\n\t\t\tY: m.Px(h),\n\t\t}\n\t}\n}\n\n// MaxSize sets the maximum size of the window.\nfunc MaxSize(w, h unit.Value) Option {\n\tif w.V <= 0 {\n\t\tpanic(\"width must be larger than or equal to 0\")\n\t}\n\tif h.V <= 0 {\n\t\tpanic(\"height must be larger than or equal to 0\")\n\t}\n\treturn func(m unit.Metric, cnf *Config) {\n\t\tcnf.MaxSize = image.Point{\n\t\t\tX: m.Px(w),\n\t\t\tY: m.Px(h),\n\t\t}\n\t}\n}\n\n// MinSize sets the minimum size of the window.\nfunc MinSize(w, h unit.Value) Option {\n\tif w.V <= 0 {\n\t\tpanic(\"width must be larger than or equal to 0\")\n\t}\n\tif h.V <= 0 {\n\t\tpanic(\"height must be larger than or equal to 0\")\n\t}\n\treturn func(m unit.Metric, cnf *Config) {\n\t\tcnf.MinSize = image.Point{\n\t\t\tX: m.Px(w),\n\t\t\tY: m.Px(h),\n\t\t}\n\t}\n}\n\n// StatusColor sets the color of the Android status bar.\nfunc StatusColor(color color.NRGBA) Option {\n\treturn func(_ unit.Metric, cnf *Config) {\n\t\tcnf.StatusColor = color\n\t}\n}\n\n// NavigationColor sets the color of the navigation bar on Android, or the address bar in browsers.\nfunc NavigationColor(color color.NRGBA) Option {\n\treturn func(_ unit.Metric, cnf *Config) {\n\t\tcnf.NavigationColor = color\n\t}\n}\n\n// CustomRenderer controls whether the window contents is\n// rendered by the client. If true, no GPU context is created.\nfunc CustomRenderer(custom bool) Option {\n\treturn func(_ unit.Metric, cnf *Config) {\n\t\tcnf.CustomRenderer = custom\n\t}\n}\n"
},
{
"path": "vendor/gioui.org/cpu/LICENSE",
"content": "This project is provided under the terms of the UNLICENSE or\nthe MIT license denoted by the following SPDX identifier:\n\nSPDX-License-Identifier: Unlicense OR MIT\n\nYou may use the project under the terms of either license.\n\nBoth licenses are reproduced below.\n\n----\nThe MIT License (MIT)\n\nCopyright (c) 2019 The Gio authors\n\nPermission is hereby granted, free of charge, to any person obtaining a copy\nof this software and associated documentation files (the \"Software\"), to deal\nin the Software without restriction, including without limitation the rights\nto use, copy, modify, merge, publish, distribute, sublicense, and/or sell\ncopies of the Software, and to permit persons to whom the Software is\nfurnished to do so, subject to the following conditions:\n\nThe above copyright notice and this permission notice shall be included in\nall copies or substantial portions of the Software.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR\nIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,\nFITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE\nAUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER\nLIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,\nOUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN\nTHE SOFTWARE.\n---\n\n\n\n---\nThe UNLICENSE\n\nThis is free and unencumbered software released into the public domain.\n\nAnyone is free to copy, modify, publish, use, compile, sell, or\ndistribute this software, either in source code form or as a compiled\nbinary, for any purpose, commercial or non-commercial, and by any\nmeans.\n\nIn jurisdictions that recognize copyright laws, the author or authors\nof this software dedicate any and all copyright interest in the\nsoftware to the public domain. We make this dedication for the benefit\nof the public at large and to the detriment of our heirs and\nsuccessors. We intend this dedication to be an overt act of\nrelinquishment in perpetuity of all present and future rights to this\nsoftware under copyright law.\n\nTHE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND,\nEXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\nMERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.\nIN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR\nOTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,\nARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR\nOTHER DEALINGS IN THE SOFTWARE.\n\nFor more information, please refer to \n---\n"
},
{
"path": "vendor/gioui.org/cpu/README.md",
"content": "# Compile and run compute programs on CPU\n\nThis projects contains the compiler for turning Vulkan SPIR-V compute shaders\ninto binaries for arm64, arm or amd64, using\n[SwiftShader](https://github.com/eliasnaur/swiftshader) with a few\nmodifications. A runtime implemented in C and Go is available for running the\nresulting binaries.\n\nThe primary use is to support a CPU-based rendering fallback for\n[Gio](https://gioui.org). In particular, the `gioui.org/shader/piet` package\ncontains arm, arm64, amd64 binaries for\n[piet-gpu](https://github.com/linebender/piet-gpu).\n\n# Compiling and running shaders\n\nThe `init.sh` script clones the modifed SwiftShader projects and builds it for\n64-bit and 32-bit. SwiftShader is not designed to cross-compile which is why a\n32-bit build is needed to compile shaders for arm.\n\nThe `example/run.sh` script demonstrates compiling and running a simple compute\nprogram.\n\n## Issues and contributions\n\nSee the [Gio contribution guide](https://gioui.org/doc/contribute).\n"
},
{
"path": "vendor/gioui.org/cpu/abi.h",
"content": "// SPDX-License-Identifier: Unlicense OR MIT\n\n#define ALIGN(bytes, type) type __attribute__((aligned(bytes)))\n\ntypedef ALIGN(8, uint8_t) byte8[8];\ntypedef ALIGN(8, uint16_t) word4[4];\ntypedef ALIGN(4, uint32_t) dword;\ntypedef ALIGN(16, uint32_t) dword4[4];\ntypedef ALIGN(8, uint64_t) qword;\ntypedef ALIGN(16, uint64_t) qword2[2];\ntypedef ALIGN(16, unsigned int) uint4[4];\ntypedef ALIGN(8, uint32_t) dword2[2];\ntypedef ALIGN(8, unsigned short) ushort4[4];\ntypedef ALIGN(16, float) float4[4];\ntypedef ALIGN(16, int) int4[4];\n\ntypedef unsigned short half;\n\ntypedef unsigned char bool;\n\nenum {\n\tMAX_BOUND_DESCRIPTOR_SETS = 4,\n\tMAX_DESCRIPTOR_SET_UNIFORM_BUFFERS_DYNAMIC = 8,\n\tMAX_DESCRIPTOR_SET_STORAGE_BUFFERS_DYNAMIC = 4,\n\tMAX_DESCRIPTOR_SET_COMBINED_BUFFERS_DYNAMIC =\n\t\tMAX_DESCRIPTOR_SET_UNIFORM_BUFFERS_DYNAMIC +\n\t\tMAX_DESCRIPTOR_SET_STORAGE_BUFFERS_DYNAMIC,\n\tMAX_PUSH_CONSTANT_SIZE = 128,\n\n\tMIN_STORAGE_BUFFER_OFFSET_ALIGNMENT = 256,\n\n\tREQUIRED_MEMORY_ALIGNMENT = 16,\n\n\tSIMD_WIDTH = 4,\n};\n\nstruct image_descriptor {\n\tALIGN(16, void *ptr);\n\tint width;\n\tint height;\n\tint depth;\n\tint row_pitch_bytes;\n\tint slice_pitch_bytes;\n\tint sample_pitch_bytes;\n\tint sample_count;\n\tint size_in_bytes;\n\n\tvoid *stencil_ptr;\n\tint stencil_row_pitch_bytes;\n\tint stencil_slice_pitch_bytes;\n\tint stencil_sample_pitch_bytes;\n\n\t// TODO: unused?\n\tvoid *memoryOwner;\n};\n\nstruct buffer_descriptor {\n\tALIGN(16, void *ptr);\n\tint size_in_bytes;\n\tint robustness_size;\n};\n\nstruct program_data {\n\tuint8_t *descriptor_sets[MAX_BOUND_DESCRIPTOR_SETS];\n\tuint32_t descriptor_dynamic_offsets[MAX_DESCRIPTOR_SET_COMBINED_BUFFERS_DYNAMIC];\n\tuint4 num_workgroups;\n\tuint4 workgroup_size;\n\tuint32_t invocations_per_subgroup;\n\tuint32_t subgroups_per_workgroup;\n\tuint32_t invocations_per_workgroup;\n\tunsigned char push_constants[MAX_PUSH_CONSTANT_SIZE];\n\t// Unused.\n\tvoid *constants;\n};\n\ntypedef int32_t yield_result;\n\ntypedef void * coroutine;\n\ntypedef coroutine (*routine_begin)(struct program_data *data,\n\tint32_t workgroupX,\n\tint32_t workgroupY,\n\tint32_t workgroupZ,\n\tvoid *workgroupMemory,\n\tint32_t firstSubgroup,\n\tint32_t subgroupCount);\n\ntypedef bool (*routine_await)(coroutine r, yield_result *res);\n\ntypedef void (*routine_destroy)(coroutine r);\n\n"
},
{
"path": "vendor/gioui.org/cpu/driver.go",
"content": "// SPDX-License-Identifier: Unlicense OR MIT\n\n//go:build linux && (arm64 || arm || amd64)\n// +build linux\n// +build arm64 arm amd64\n\npackage cpu\n\n/*\n#cgo CFLAGS: -std=c11 -D_POSIX_C_SOURCE=200112L\n\n#include \n#include \n#include \"abi.h\"\n#include \"runtime.h\"\n*/\nimport \"C\"\nimport (\n\t\"unsafe\"\n)\n\ntype (\n\tBufferDescriptor = C.struct_buffer_descriptor\n\tImageDescriptor = C.struct_image_descriptor\n\tSamplerDescriptor = C.struct_sampler_descriptor\n\n\tDispatchContext = C.struct_dispatch_context\n\tThreadContext = C.struct_thread_context\n\tProgramInfo = C.struct_program_info\n)\n\nconst Supported = true\n\nfunc NewBuffer(size int) BufferDescriptor {\n\treturn C.alloc_buffer(C.size_t(size))\n}\n\nfunc (d *BufferDescriptor) Data() []byte {\n\treturn (*(*[1 << 30]byte)(d.ptr))[:d.size_in_bytes:d.size_in_bytes]\n}\n\nfunc (d *BufferDescriptor) Free() {\n\tif d.ptr != nil {\n\t\tC.free(d.ptr)\n\t}\n\t*d = BufferDescriptor{}\n}\n\nfunc NewImageRGBA(width, height int) ImageDescriptor {\n\treturn C.alloc_image_rgba(C.int(width), C.int(height))\n}\n\nfunc (d *ImageDescriptor) Data() []byte {\n\treturn (*(*[1 << 30]byte)(d.ptr))[:d.size_in_bytes:d.size_in_bytes]\n}\n\nfunc (d *ImageDescriptor) Free() {\n\tif d.ptr != nil {\n\t\tC.free(d.ptr)\n\t}\n\t*d = ImageDescriptor{}\n}\n\nfunc NewDispatchContext() *DispatchContext {\n\treturn C.alloc_dispatch_context()\n}\n\nfunc (c *DispatchContext) Free() {\n\tC.free_dispatch_context(c)\n}\n\nfunc (c *DispatchContext) Prepare(numThreads int, prog *ProgramInfo, descSet unsafe.Pointer, x, y, z int) {\n\tC.prepare_dispatch(c, C.int(numThreads), prog, (*C.uint8_t)(descSet), C.int(x), C.int(y), C.int(z))\n}\n\nfunc (c *DispatchContext) Dispatch(threadIdx int, ctx *ThreadContext) {\n\tC.dispatch_thread(c, C.int(threadIdx), ctx)\n}\n\nfunc NewThreadContext() *ThreadContext {\n\treturn C.alloc_thread_context()\n}\n\nfunc (c *ThreadContext) Free() {\n\tC.free_thread_context(c)\n}\n"
},
{
"path": "vendor/gioui.org/cpu/driver_nosupport.go",
"content": "// SPDX-License-Identifier: Unlicense OR MIT\n\n//go:build !(linux && (arm64 || arm || amd64))\n// +build !linux !arm64,!arm,!amd64\n\npackage cpu\n\nimport \"unsafe\"\n\ntype (\n\tBufferDescriptor struct{}\n\tImageDescriptor struct{}\n\tSamplerDescriptor struct{}\n\n\tDispatchContext struct{}\n\tThreadContext struct{}\n\tProgramInfo struct{}\n)\n\nconst Supported = false\n\nfunc NewBuffer(size int) BufferDescriptor {\n\tpanic(\"unsupported\")\n}\n\nfunc (d *BufferDescriptor) Data() []byte {\n\tpanic(\"unsupported\")\n}\n\nfunc (d *BufferDescriptor) Free() {\n}\n\nfunc NewImageRGBA(width, height int) ImageDescriptor {\n\tpanic(\"unsupported\")\n}\n\nfunc (d *ImageDescriptor) Data() []byte {\n\tpanic(\"unsupported\")\n}\n\nfunc (d *ImageDescriptor) Free() {\n}\n\nfunc NewDispatchContext() *DispatchContext {\n\tpanic(\"unsupported\")\n}\n\nfunc (c *DispatchContext) Free() {\n}\n\nfunc (c *DispatchContext) Prepare(numThreads int, prog *ProgramInfo, descSet unsafe.Pointer, x, y, z int) {\n\tpanic(\"unsupported\")\n}\n\nfunc (c *DispatchContext) Dispatch(threadIdx int, ctx *ThreadContext) {\n\tpanic(\"unsupported\")\n}\n\nfunc NewThreadContext() *ThreadContext {\n\tpanic(\"unsupported\")\n}\n\nfunc (c *ThreadContext) Free() {\n}\n"
},
{
"path": "vendor/gioui.org/cpu/embed.go",
"content": "// SPDX-License-Identifier: Unlicense OR MIT\n\npackage cpu\n\nimport _ \"embed\"\n\n//go:embed abi.h\nvar ABIH []byte\n\n//go:embed runtime.h\nvar RuntimeH []byte\n"
},
{
"path": "vendor/gioui.org/cpu/go.mod",
"content": "module gioui.org/cpu\n\ngo 1.17\n"
},
{
"path": "vendor/gioui.org/cpu/go.sum",
"content": ""
},
{
"path": "vendor/gioui.org/cpu/init.sh",
"content": "#!/bin/sh\n\n# SPDX-License-Identifier: Unlicense OR MIT\n\nset -e\n\ncd ~/.cache\ngit clone https://github.com/eliasnaur/swiftshader\ncd swiftshader\n\n# 32-bit build\ncp -a build build.32bit\ncd build.32bit\nCXX=clang++ CC=clang CFLAGS=-m32 CXXFLAGS=-m32 cmake -DREACTOR_EMIT_ASM_FILE=true -DSWIFTSHADER_BUILD_PVR=false -DSWIFTSHADER_BUILD_TESTS=false -DSWIFTSHADER_BUILD_GLESv2=false -DSWIFTSHADER_BUILD_EGL=false -DSWIFTSHADER_BUILD_ANGLE=false ..\ncmake --build . --parallel 4\ncd ..\n\n# 64-bit build\ncp -a build build.64bit\ncd build.64bit\nCXX=clang++ CC=clang cmake -DREACTOR_EMIT_ASM_FILE=true -DSWIFTSHADER_BUILD_PVR=false -DSWIFTSHADER_BUILD_TESTS=false -DSWIFTSHADER_BUILD_GLESv2=false -DSWIFTSHADER_BUILD_EGL=false -DSWIFTSHADER_BUILD_ANGLE=false ..\ncmake --build . --parallel 4\ncd ..\n"
},
{
"path": "vendor/gioui.org/cpu/runtime.c",
"content": "// SPDX-License-Identifier: Unlicense OR MIT\n\n//go:build linux && (arm64 || arm || amd64)\n// +build linux\n// +build arm64 arm amd64\n\n#include \n#include \n#include \n#include \n#include \n#include \n#include \"abi.h\"\n#include \"runtime.h\"\n#include \"_cgo_export.h\"\n\n// coroutines is a FIFO queue of coroutines implemented as a circular\n// buffer.\nstruct coroutines {\n\tcoroutine *routines;\n\t// start and end indexes into routines.\n\tunsigned int start;\n\tunsigned int end;\n\t// cap is the capacity of routines.\n\tunsigned int cap;\n};\n\nstruct dispatch_context {\n\t// descriptor_set is the aligned storage for the descriptor set.\n\tvoid *descriptor_set;\n\tint desc_set_size;\n\n\tint nthreads;\n\tbool has_cbarriers;\n\tsize_t memory_size;\n\t// Program entrypoints.\n\troutine_begin begin;\n\troutine_await await;\n\troutine_destroy destroy;\n\n\tstruct program_data data;\n};\n\nstruct thread_context {\n\tstruct coroutines routines;\n\tsize_t memory_size;\n\tuint8_t *memory;\n};\n\nstatic void *malloc_align(size_t alignment, size_t size) {\n\tvoid *ptr;\n\tint ret = posix_memalign(&ptr, alignment, size);\n\tassert(ret == 0);\n\treturn ptr;\n}\n\nstatic void coroutines_dump(struct coroutines *routines) {\n\tfprintf(stderr, \"s: %d e: %d c: %d [\", routines->start, routines->end, routines->cap);\n\tunsigned int i = routines->start;\n\twhile (i != routines->end) {\n\t\tfprintf(stderr, \"%p,\", routines->routines[routines->start]);\n\t\ti = (i + 1)%routines->cap;\n\t}\n\tfprintf(stderr, \"]\\n\");\n}\n\nstatic void coroutines_push(struct coroutines *routines, coroutine r) {\n\tunsigned int next = routines->end + 1;\n\tif (next >= routines->cap) {\n\t\tnext = 0;\n\t}\n\tif (next == routines->start) {\n\t\tunsigned int newcap = routines->cap*2;\n\t\tif (newcap < 10) {\n\t\t\tnewcap = 10;\n\t\t}\n\t\troutines->routines = realloc(routines->routines, newcap*sizeof(coroutine));\n\t\t// Move elements wrapped around the old cap to the newly allocated space.\n\t\tif (routines->end < routines->start) {\n\t\t\tunsigned int nelems = routines->end;\n\t\t\tunsigned int max = newcap - routines->cap;\n\t\t\t// We doubled the space above, so we can assume enough room.\n\t\t\tassert(nelems <= max);\n\t\t\tmemmove(&routines->routines[routines->cap], &routines->routines[0], nelems*sizeof(coroutine));\n\t\t\troutines->end += routines->cap;\n\t\t}\n\t\troutines->cap = newcap;\n\t\tnext = (routines->end + 1)%routines->cap;\n\t}\n\troutines->routines[routines->end] = r;\n\troutines->end = next;\n}\n\nstatic bool coroutines_pop(struct coroutines *routines, coroutine *r) {\n\tif (routines->start == routines->end) {\n\t\treturn 0;\n\t}\n\t*r = routines->routines[routines->start];\n\troutines->start = (routines->start + 1)%routines->cap;\n\treturn 1;\n}\n\nstatic void coroutines_free(struct coroutines *routines) {\n\tif (routines->routines != NULL) {\n\t\tfree(routines->routines);\n\t}\n\tstruct coroutines clr = { 0 }; *routines = clr;\n}\n\nstruct dispatch_context *alloc_dispatch_context(void) {\n\tstruct dispatch_context *c = malloc(sizeof(*c));\n\tassert(c != NULL);\n\tstruct dispatch_context clr = { 0 }; *c = clr;\n\treturn c;\n}\n\nvoid free_dispatch_context(struct dispatch_context *c) {\n\tif (c->descriptor_set != NULL) {\n\t\tfree(c->descriptor_set);\n\t\tc->descriptor_set = NULL;\n\t}\n}\n\nstruct thread_context *alloc_thread_context(void) {\n\tstruct thread_context *c = malloc(sizeof(*c));\n\tassert(c != NULL);\n\tstruct thread_context clr = { 0 }; *c = clr;\n\treturn c;\n}\n\nvoid free_thread_context(struct thread_context *c) {\n\tif (c->memory != NULL) {\n\t\tfree(c->memory);\n\t}\n\tcoroutines_free(&c->routines);\n\tstruct thread_context clr = { 0 }; *c = clr;\n}\n\nstruct buffer_descriptor alloc_buffer(size_t size) {\n\tvoid *buf = malloc_align(MIN_STORAGE_BUFFER_OFFSET_ALIGNMENT, size);\n\tstruct buffer_descriptor desc = {\n\t\t.ptr = buf,\n\t\t.size_in_bytes = size,\n\t\t.robustness_size = size,\n\t};\n\treturn desc;\n}\n\nstruct image_descriptor alloc_image_rgba(int width, int height) {\n\tsize_t size = width*height*4;\n\tsize = (size + 16 - 1)&~(16 - 1);\n\tvoid *storage = malloc_align(REQUIRED_MEMORY_ALIGNMENT, size);\n\tstruct image_descriptor desc = { 0 };\n\tdesc.ptr = storage;\n\tdesc.width = width;\n\tdesc.height = height;\n\tdesc.depth = 1;\n\tdesc.row_pitch_bytes = width*4;\n\tdesc.slice_pitch_bytes = size;\n\tdesc.sample_pitch_bytes = size;\n\tdesc.sample_count = 1;\n\tdesc.size_in_bytes = size;\n\treturn desc;\n}\n\nvoid prepare_dispatch(struct dispatch_context *ctx, int nthreads, struct program_info *info, uint8_t *desc_set, int ngroupx, int ngroupy, int ngroupz) {\n\tif (ctx->desc_set_size < info->desc_set_size) {\n\t\tif (ctx->descriptor_set != NULL) {\n\t\t\tfree(ctx->descriptor_set);\n\t\t}\n\t\tctx->descriptor_set = malloc_align(16, info->desc_set_size);\n\t\tctx->desc_set_size = info->desc_set_size;\n\t}\n\tmemcpy(ctx->descriptor_set, desc_set, info->desc_set_size);\n\n\tint invocations_per_subgroup = SIMD_WIDTH;\n\tint invocations_per_workgroup = info->workgroup_size_x * info->workgroup_size_y * info->workgroup_size_z;\n\tint subgroups_per_workgroup = (invocations_per_workgroup + invocations_per_subgroup - 1) / invocations_per_subgroup;\n\n\tctx->has_cbarriers = info->has_cbarriers;\n\tctx->begin = info->begin;\n\tctx->await = info->await;\n\tctx->destroy = info->destroy;\n\tctx->nthreads = nthreads;\n\tctx->memory_size = info->min_memory_size;\n\n\tctx->data.workgroup_size[0] = info->workgroup_size_x;\n\tctx->data.workgroup_size[1] = info->workgroup_size_y;\n\tctx->data.workgroup_size[2] = info->workgroup_size_z;\n\tctx->data.num_workgroups[0] = ngroupx;\n\tctx->data.num_workgroups[1] = ngroupy;\n\tctx->data.num_workgroups[2] = ngroupz;\n\tctx->data.invocations_per_subgroup = invocations_per_subgroup;\n\tctx->data.invocations_per_workgroup = invocations_per_workgroup;\n\tctx->data.subgroups_per_workgroup = subgroups_per_workgroup;\n\tctx->data.descriptor_sets[0] = ctx->descriptor_set;\n}\n\nvoid dispatch_thread(struct dispatch_context *ctx, int thread_idx, struct thread_context *thread) {\n\tif (thread->memory_size < ctx->memory_size) {\n\t\tif (thread->memory != NULL) {\n\t\t\tfree(thread->memory);\n\t\t}\n\t\t// SwiftShader doesn't seem to align shared memory. However, better safe\n\t\t// than subtle errors. Note that the program info generator pads\n\t\t// memory_size to ensure space for alignment.\n\t\tthread->memory = malloc_align(16, ctx->memory_size);\n\t\tthread->memory_size = ctx->memory_size;\n\t}\n\tuint8_t *memory = thread->memory;\n\n\tstruct program_data *data = &ctx->data;\n\n\tint sx = data->num_workgroups[0];\n\tint sy = data->num_workgroups[1];\n\tint sz = data->num_workgroups[2];\n\tint ngroups = sx * sy * sz;\n\n\tfor (int i = thread_idx; i < ngroups; i += ctx->nthreads) {\n\t\tint group_id = i;\n\t\tint z = group_id / (sx * sy);\n\t\tgroup_id -= z * sx * sy;\n\t\tint y = group_id / sx;\n\t\tgroup_id -= y * sx;\n\t\tint x = group_id;\n\t\tif (ctx->has_cbarriers) {\n\t\t\tfor (int subgroup = 0; subgroup < data->subgroups_per_workgroup; subgroup++) {\n\t\t\t\tcoroutine r = ctx->begin(data, x, y, z, memory, subgroup, 1);\n\t\t\t\tcoroutines_push(&thread->routines, r);\n\t\t\t}\n\t\t} else {\n\t\t\tcoroutine r = ctx->begin(data, x, y, z, memory, 0, data->subgroups_per_workgroup);\n\t\t\tcoroutines_push(&thread->routines, r);\n\t\t}\n\t\tcoroutine r;\n\t\twhile (coroutines_pop(&thread->routines, &r)) {\n\t\t\tyield_result res;\n\t\t\tif (ctx->await(r, &res)) {\n\t\t\t\tcoroutines_push(&thread->routines, r);\n\t\t\t} else {\n\t\t\t\tctx->destroy(r);\n\t\t\t}\n\t\t}\n\t}\n}\n"
},
{
"path": "vendor/gioui.org/cpu/runtime.h",
"content": "// SPDX-License-Identifier: Unlicense OR MIT\n\n#define ATTR_HIDDEN __attribute__ ((visibility (\"hidden\")))\n\n// program_info contains constant parameters for a program.\nstruct program_info {\n\t// MinMemorySize is the minimum size of memory passed to dispatch.\n\tsize_t min_memory_size;\n\t// has_cbarriers is 1 when the program contains control barriers.\n\tbool has_cbarriers;\n\t// desc_set_size is the size of the first descriptor set for the program.\n\tsize_t desc_set_size;\n\tint workgroup_size_x;\n\tint workgroup_size_y;\n\tint workgroup_size_z;\n\t// Program entrypoints.\n\troutine_begin begin;\n\troutine_await await;\n\troutine_destroy destroy;\n};\n\n// dispatch_context contains the information a program dispatch.\nstruct dispatch_context;\n\n// thread_context contains the working memory of a batch. It may be\n// reused, but not concurrently.\nstruct thread_context;\n\nextern struct buffer_descriptor alloc_buffer(size_t size) ATTR_HIDDEN;\nextern struct image_descriptor alloc_image_rgba(int width, int height) ATTR_HIDDEN;\n\nextern struct dispatch_context *alloc_dispatch_context(void) ATTR_HIDDEN;\n\nextern void free_dispatch_context(struct dispatch_context *c) ATTR_HIDDEN;\n\nextern struct thread_context *alloc_thread_context(void) ATTR_HIDDEN;\n\nextern void free_thread_context(struct thread_context *c) ATTR_HIDDEN;\n\n// prepare_dispatch initializes ctx to run a dispatch of a program distributed\n// among nthreads threads.\nextern void prepare_dispatch(struct dispatch_context *ctx, int nthreads, struct program_info *info, uint8_t *desc_set, int ngroupx, int ngroupy, int ngroupz) ATTR_HIDDEN;\n\n// dispatch_batch executes a dispatch batch.\nextern void dispatch_thread(struct dispatch_context *ctx, int thread_idx, struct thread_context *thread) ATTR_HIDDEN;\n"
},
{
"path": "vendor/gioui.org/f32/affine.go",
"content": "// SPDX-License-Identifier: Unlicense OR MIT\n\npackage f32\n\nimport (\n\t\"fmt\"\n\t\"math\"\n)\n\n// Affine2D represents an affine 2D transformation. The zero value if Affine2D\n// represents the identity transform.\ntype Affine2D struct {\n\t// in order to make the zero value of Affine2D represent the identity\n\t// transform we store it with the identity matrix subtracted, that is\n\t// if the actual transformation matrix is:\n\t// [sx, hx, ox]\n\t// [hy, sy, oy]\n\t// [ 0, 0, 1]\n\t// we store a = sx-1 and e = sy-1\n\ta, b, c float32\n\td, e, f float32\n}\n\n// NewAffine2D creates a new Affine2D transform from the matrix elements\n// in row major order. The rows are: [sx, hx, ox], [hy, sy, oy], [0, 0, 1].\nfunc NewAffine2D(sx, hx, ox, hy, sy, oy float32) Affine2D {\n\treturn Affine2D{\n\t\ta: sx - 1, b: hx, c: ox,\n\t\td: hy, e: sy - 1, f: oy,\n\t}\n}\n\n// Offset the transformation.\nfunc (a Affine2D) Offset(offset Point) Affine2D {\n\treturn Affine2D{\n\t\ta.a, a.b, a.c + offset.X,\n\t\ta.d, a.e, a.f + offset.Y,\n\t}\n}\n\n// Scale the transformation around the given origin.\nfunc (a Affine2D) Scale(origin, factor Point) Affine2D {\n\tif origin == (Point{}) {\n\t\treturn a.scale(factor)\n\t}\n\ta = a.Offset(origin.Mul(-1))\n\ta = a.scale(factor)\n\treturn a.Offset(origin)\n}\n\n// Rotate the transformation by the given angle (in radians) counter clockwise around the given origin.\nfunc (a Affine2D) Rotate(origin Point, radians float32) Affine2D {\n\tif origin == (Point{}) {\n\t\treturn a.rotate(radians)\n\t}\n\ta = a.Offset(origin.Mul(-1))\n\ta = a.rotate(radians)\n\treturn a.Offset(origin)\n}\n\n// Shear the transformation by the given angle (in radians) around the given origin.\nfunc (a Affine2D) Shear(origin Point, radiansX, radiansY float32) Affine2D {\n\tif origin == (Point{}) {\n\t\treturn a.shear(radiansX, radiansY)\n\t}\n\ta = a.Offset(origin.Mul(-1))\n\ta = a.shear(radiansX, radiansY)\n\treturn a.Offset(origin)\n}\n\n// Mul returns A*B.\nfunc (A Affine2D) Mul(B Affine2D) (r Affine2D) {\n\tr.a = (A.a+1)*(B.a+1) + A.b*B.d - 1\n\tr.b = (A.a+1)*B.b + A.b*(B.e+1)\n\tr.c = (A.a+1)*B.c + A.b*B.f + A.c\n\tr.d = A.d*(B.a+1) + (A.e+1)*B.d\n\tr.e = A.d*B.b + (A.e+1)*(B.e+1) - 1\n\tr.f = A.d*B.c + (A.e+1)*B.f + A.f\n\treturn r\n}\n\n// Invert the transformation. Note that if the matrix is close to singular\n// numerical errors may become large or infinity.\nfunc (a Affine2D) Invert() Affine2D {\n\tif a.a == 0 && a.b == 0 && a.d == 0 && a.e == 0 {\n\t\treturn Affine2D{a: 0, b: 0, c: -a.c, d: 0, e: 0, f: -a.f}\n\t}\n\ta.a += 1\n\ta.e += 1\n\tdet := a.a*a.e - a.b*a.d\n\ta.a, a.e = a.e/det, a.a/det\n\ta.b, a.d = -a.b/det, -a.d/det\n\ttemp := a.c\n\ta.c = -a.a*a.c - a.b*a.f\n\ta.f = -a.d*temp - a.e*a.f\n\ta.a -= 1\n\ta.e -= 1\n\treturn a\n}\n\n// Transform p by returning a*p.\nfunc (a Affine2D) Transform(p Point) Point {\n\treturn Point{\n\t\tX: p.X*(a.a+1) + p.Y*a.b + a.c,\n\t\tY: p.X*a.d + p.Y*(a.e+1) + a.f,\n\t}\n}\n\n// Elems returns the matrix elements of the transform in row-major order. The\n// rows are: [sx, hx, ox], [hy, sy, oy], [0, 0, 1].\nfunc (a Affine2D) Elems() (sx, hx, ox, hy, sy, oy float32) {\n\treturn a.a + 1, a.b, a.c, a.d, a.e + 1, a.f\n}\n\nfunc (a Affine2D) scale(factor Point) Affine2D {\n\treturn Affine2D{\n\t\t(a.a+1)*factor.X - 1, a.b * factor.X, a.c * factor.X,\n\t\ta.d * factor.Y, (a.e+1)*factor.Y - 1, a.f * factor.Y,\n\t}\n}\n\nfunc (a Affine2D) rotate(radians float32) Affine2D {\n\tsin, cos := math.Sincos(float64(radians))\n\ts, c := float32(sin), float32(cos)\n\treturn Affine2D{\n\t\t(a.a+1)*c - a.d*s - 1, a.b*c - (a.e+1)*s, a.c*c - a.f*s,\n\t\t(a.a+1)*s + a.d*c, a.b*s + (a.e+1)*c - 1, a.c*s + a.f*c,\n\t}\n}\n\nfunc (a Affine2D) shear(radiansX, radiansY float32) Affine2D {\n\ttx := float32(math.Tan(float64(radiansX)))\n\tty := float32(math.Tan(float64(radiansY)))\n\treturn Affine2D{\n\t\t(a.a + 1) + a.d*tx - 1, a.b + (a.e+1)*tx, a.c + a.f*tx,\n\t\t(a.a+1)*ty + a.d, a.b*ty + (a.e + 1) - 1, a.f*ty + a.f,\n\t}\n}\n\nfunc (a Affine2D) String() string {\n\tsx, hx, ox, hy, sy, oy := a.Elems()\n\treturn fmt.Sprintf(\"[[%f %f %f] [%f %f %f]]\", sx, hx, ox, hy, sy, oy)\n}\n"
},
{
"path": "vendor/gioui.org/f32/f32.go",
"content": "// SPDX-License-Identifier: Unlicense OR MIT\n\n/*\nPackage f32 is a float32 implementation of package image's\nPoint and Rectangle.\n\nThe coordinate space has the origin in the top left\ncorner with the axes extending right and down.\n*/\npackage f32\n\nimport \"strconv\"\n\n// A Point is a two dimensional point.\ntype Point struct {\n\tX, Y float32\n}\n\n// String return a string representation of p.\nfunc (p Point) String() string {\n\treturn \"(\" + strconv.FormatFloat(float64(p.X), 'f', -1, 32) +\n\t\t\",\" + strconv.FormatFloat(float64(p.Y), 'f', -1, 32) + \")\"\n}\n\n// A Rectangle contains the points (X, Y) where Min.X <= X < Max.X,\n// Min.Y <= Y < Max.Y.\ntype Rectangle struct {\n\tMin, Max Point\n}\n\n// String return a string representation of r.\nfunc (r Rectangle) String() string {\n\treturn r.Min.String() + \"-\" + r.Max.String()\n}\n\n// Rect is a shorthand for Rectangle{Point{x0, y0}, Point{x1, y1}}.\n// The returned Rectangle has x0 and y0 swapped if necessary so that\n// it's correctly formed.\nfunc Rect(x0, y0, x1, y1 float32) Rectangle {\n\tif x0 > x1 {\n\t\tx0, x1 = x1, x0\n\t}\n\tif y0 > y1 {\n\t\ty0, y1 = y1, y0\n\t}\n\treturn Rectangle{Point{x0, y0}, Point{x1, y1}}\n}\n\n// Pt is shorthand for Point{X: x, Y: y}.\nfunc Pt(x, y float32) Point {\n\treturn Point{X: x, Y: y}\n}\n\n// Add return the point p+p2.\nfunc (p Point) Add(p2 Point) Point {\n\treturn Point{X: p.X + p2.X, Y: p.Y + p2.Y}\n}\n\n// Sub returns the vector p-p2.\nfunc (p Point) Sub(p2 Point) Point {\n\treturn Point{X: p.X - p2.X, Y: p.Y - p2.Y}\n}\n\n// Mul returns p scaled by s.\nfunc (p Point) Mul(s float32) Point {\n\treturn Point{X: p.X * s, Y: p.Y * s}\n}\n\n// Div returns the vector p/s.\nfunc (p Point) Div(s float32) Point {\n\treturn Point{X: p.X / s, Y: p.Y / s}\n}\n\n// In reports whether p is in r.\nfunc (p Point) In(r Rectangle) bool {\n\treturn r.Min.X <= p.X && p.X < r.Max.X &&\n\t\tr.Min.Y <= p.Y && p.Y < r.Max.Y\n}\n\n// Size returns r's width and height.\nfunc (r Rectangle) Size() Point {\n\treturn Point{X: r.Dx(), Y: r.Dy()}\n}\n\n// Dx returns r's width.\nfunc (r Rectangle) Dx() float32 {\n\treturn r.Max.X - r.Min.X\n}\n\n// Dy returns r's Height.\nfunc (r Rectangle) Dy() float32 {\n\treturn r.Max.Y - r.Min.Y\n}\n\n// Intersect returns the intersection of r and s.\nfunc (r Rectangle) Intersect(s Rectangle) Rectangle {\n\tif r.Min.X < s.Min.X {\n\t\tr.Min.X = s.Min.X\n\t}\n\tif r.Min.Y < s.Min.Y {\n\t\tr.Min.Y = s.Min.Y\n\t}\n\tif r.Max.X > s.Max.X {\n\t\tr.Max.X = s.Max.X\n\t}\n\tif r.Max.Y > s.Max.Y {\n\t\tr.Max.Y = s.Max.Y\n\t}\n\tif r.Empty() {\n\t\treturn Rectangle{}\n\t}\n\treturn r\n}\n\n// Union returns the union of r and s.\nfunc (r Rectangle) Union(s Rectangle) Rectangle {\n\tif r.Empty() {\n\t\treturn s\n\t}\n\tif s.Empty() {\n\t\treturn r\n\t}\n\tif r.Min.X > s.Min.X {\n\t\tr.Min.X = s.Min.X\n\t}\n\tif r.Min.Y > s.Min.Y {\n\t\tr.Min.Y = s.Min.Y\n\t}\n\tif r.Max.X < s.Max.X {\n\t\tr.Max.X = s.Max.X\n\t}\n\tif r.Max.Y < s.Max.Y {\n\t\tr.Max.Y = s.Max.Y\n\t}\n\treturn r\n}\n\n// Canon returns the canonical version of r, where Min is to\n// the upper left of Max.\nfunc (r Rectangle) Canon() Rectangle {\n\tif r.Max.X < r.Min.X {\n\t\tr.Min.X, r.Max.X = r.Max.X, r.Min.X\n\t}\n\tif r.Max.Y < r.Min.Y {\n\t\tr.Min.Y, r.Max.Y = r.Max.Y, r.Min.Y\n\t}\n\treturn r\n}\n\n// Empty reports whether r represents the empty area.\nfunc (r Rectangle) Empty() bool {\n\treturn r.Min.X >= r.Max.X || r.Min.Y >= r.Max.Y\n}\n\n// Add offsets r with the vector p.\nfunc (r Rectangle) Add(p Point) Rectangle {\n\treturn Rectangle{\n\t\tPoint{r.Min.X + p.X, r.Min.Y + p.Y},\n\t\tPoint{r.Max.X + p.X, r.Max.Y + p.Y},\n\t}\n}\n\n// Sub offsets r with the vector -p.\nfunc (r Rectangle) Sub(p Point) Rectangle {\n\treturn Rectangle{\n\t\tPoint{r.Min.X - p.X, r.Min.Y - p.Y},\n\t\tPoint{r.Max.X - p.X, r.Max.Y - p.Y},\n\t}\n}\n"
},
{
"path": "vendor/gioui.org/font/opentype/opentype.go",
"content": "// SPDX-License-Identifier: Unlicense OR MIT\n\n// Package opentype implements text layout and shaping for OpenType\n// files.\npackage opentype\n\nimport (\n\t\"bytes\"\n\t\"io\"\n\t\"unicode\"\n\t\"unicode/utf8\"\n\n\t\"golang.org/x/image/font\"\n\t\"golang.org/x/image/font/sfnt\"\n\t\"golang.org/x/image/math/fixed\"\n\n\t\"gioui.org/f32\"\n\t\"gioui.org/op\"\n\t\"gioui.org/op/clip\"\n\t\"gioui.org/text\"\n)\n\n// Font implements text.Face. Its methods are safe to use\n// concurrently.\ntype Font struct {\n\tfont *sfnt.Font\n}\n\n// Collection is a collection of one or more fonts. When used as a text.Face,\n// each rune will be assigned a glyph from the first font in the collection\n// that supports it.\ntype Collection struct {\n\tfonts []*opentype\n}\n\ntype opentype struct {\n\tFont *sfnt.Font\n\tHinting font.Hinting\n}\n\n// a glyph represents a rune and its advance according to a Font.\n// TODO: remove this type and work on io.Readers directly.\ntype glyph struct {\n\tRune rune\n\tAdvance fixed.Int26_6\n}\n\n// NewFont parses an SFNT font, such as TTF or OTF data, from a []byte\n// data source.\nfunc Parse(src []byte) (*Font, error) {\n\tfnt, err := sfnt.Parse(src)\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\treturn &Font{font: fnt}, nil\n}\n\n// ParseCollection parses an SFNT font collection, such as TTC or OTC data,\n// from a []byte data source.\n//\n// If passed data for a single font, a TTF or OTF instead of a TTC or OTC,\n// it will return a collection containing 1 font.\nfunc ParseCollection(src []byte) (*Collection, error) {\n\tc, err := sfnt.ParseCollection(src)\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\treturn newCollectionFrom(c)\n}\n\n// ParseCollectionReaderAt parses an SFNT collection, such as TTC or OTC data,\n// from an io.ReaderAt data source.\n//\n// If passed data for a single font, a TTF or OTF instead of a TTC or OTC, it\n// will return a collection containing 1 font.\nfunc ParseCollectionReaderAt(src io.ReaderAt) (*Collection, error) {\n\tc, err := sfnt.ParseCollectionReaderAt(src)\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\treturn newCollectionFrom(c)\n}\n\nfunc newCollectionFrom(coll *sfnt.Collection) (*Collection, error) {\n\tfonts := make([]*opentype, coll.NumFonts())\n\tfor i := range fonts {\n\t\tfnt, err := coll.Font(i)\n\t\tif err != nil {\n\t\t\treturn nil, err\n\t\t}\n\t\tfonts[i] = &opentype{\n\t\t\tFont: fnt,\n\t\t\tHinting: font.HintingFull,\n\t\t}\n\t}\n\treturn &Collection{fonts: fonts}, nil\n}\n\n// NumFonts returns the number of fonts in the collection.\nfunc (c *Collection) NumFonts() int {\n\treturn len(c.fonts)\n}\n\n// Font returns the i'th font in the collection.\nfunc (c *Collection) Font(i int) (*Font, error) {\n\tif i < 0 || len(c.fonts) <= i {\n\t\treturn nil, sfnt.ErrNotFound\n\t}\n\treturn &Font{font: c.fonts[i].Font}, nil\n}\n\nfunc (f *Font) Layout(ppem fixed.Int26_6, maxWidth int, txt io.Reader) ([]text.Line, error) {\n\tglyphs, err := readGlyphs(txt)\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\tfonts := []*opentype{{Font: f.font, Hinting: font.HintingFull}}\n\tvar buf sfnt.Buffer\n\treturn layoutText(&buf, ppem, maxWidth, fonts, glyphs)\n}\n\nfunc (f *Font) Shape(ppem fixed.Int26_6, str text.Layout) clip.PathSpec {\n\tvar buf sfnt.Buffer\n\treturn textPath(&buf, ppem, []*opentype{{Font: f.font, Hinting: font.HintingFull}}, str)\n}\n\nfunc (f *Font) Metrics(ppem fixed.Int26_6) font.Metrics {\n\to := &opentype{Font: f.font, Hinting: font.HintingFull}\n\tvar buf sfnt.Buffer\n\treturn o.Metrics(&buf, ppem)\n}\n\nfunc (c *Collection) Layout(ppem fixed.Int26_6, maxWidth int, txt io.Reader) ([]text.Line, error) {\n\tglyphs, err := readGlyphs(txt)\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\tvar buf sfnt.Buffer\n\treturn layoutText(&buf, ppem, maxWidth, c.fonts, glyphs)\n}\n\nfunc (c *Collection) Shape(ppem fixed.Int26_6, str text.Layout) clip.PathSpec {\n\tvar buf sfnt.Buffer\n\treturn textPath(&buf, ppem, c.fonts, str)\n}\n\nfunc fontForGlyph(buf *sfnt.Buffer, fonts []*opentype, r rune) *opentype {\n\tif len(fonts) < 1 {\n\t\treturn nil\n\t}\n\tfor _, f := range fonts {\n\t\tif f.HasGlyph(buf, r) {\n\t\t\treturn f\n\t\t}\n\t}\n\treturn fonts[0] // Use replacement character from the first font if necessary\n}\n\nfunc layoutText(sbuf *sfnt.Buffer, ppem fixed.Int26_6, maxWidth int, fonts []*opentype, glyphs []glyph) ([]text.Line, error) {\n\tvar lines []text.Line\n\tvar nextLine text.Line\n\tupdateBounds := func(f *opentype) {\n\t\tm := f.Metrics(sbuf, ppem)\n\t\tif m.Ascent > nextLine.Ascent {\n\t\t\tnextLine.Ascent = m.Ascent\n\t\t}\n\t\t// m.Height is equal to m.Ascent + m.Descent + linegap.\n\t\t// Compute the descent including the linegap.\n\t\tdescent := m.Height - m.Ascent\n\t\tif descent > nextLine.Descent {\n\t\t\tnextLine.Descent = descent\n\t\t}\n\t\tb := f.Bounds(sbuf, ppem)\n\t\tnextLine.Bounds = nextLine.Bounds.Union(b)\n\t}\n\tmaxDotX := fixed.I(maxWidth)\n\ttype state struct {\n\t\tr rune\n\t\tf *opentype\n\t\tadv fixed.Int26_6\n\t\tx fixed.Int26_6\n\t\tidx int\n\t\tlen int\n\t\tvalid bool\n\t}\n\tvar prev, word state\n\tendLine := func() {\n\t\tif prev.f == nil && len(fonts) > 0 {\n\t\t\tprev.f = fonts[0]\n\t\t}\n\t\tupdateBounds(prev.f)\n\t\tnextLine.Layout = toLayout(glyphs[:prev.idx:prev.idx])\n\t\tnextLine.Width = prev.x + prev.adv\n\t\tnextLine.Bounds.Max.X += prev.x\n\t\tlines = append(lines, nextLine)\n\t\tglyphs = glyphs[prev.idx:]\n\t\tnextLine = text.Line{}\n\t\tprev = state{}\n\t\tword = state{}\n\t}\n\tfor prev.idx < len(glyphs) {\n\t\tg := &glyphs[prev.idx]\n\t\tnext := state{\n\t\t\tr: g.Rune,\n\t\t\tf: fontForGlyph(sbuf, fonts, g.Rune),\n\t\t\tidx: prev.idx + 1,\n\t\t\tlen: prev.len + utf8.RuneLen(g.Rune),\n\t\t\tx: prev.x + prev.adv,\n\t\t}\n\t\tif next.f != nil {\n\t\t\tif next.f != prev.f {\n\t\t\t\tupdateBounds(next.f)\n\t\t\t}\n\t\t\tnext.adv, next.valid = next.f.GlyphAdvance(sbuf, ppem, g.Rune)\n\t\t}\n\t\tif g.Rune == '\\n' {\n\t\t\t// The newline is zero width; use the previous\n\t\t\t// character for line measurements.\n\t\t\tprev.idx = next.idx\n\t\t\tprev.len = next.len\n\t\t\tendLine()\n\t\t\tcontinue\n\t\t}\n\t\tvar k fixed.Int26_6\n\t\tif prev.valid && next.f != nil {\n\t\t\tk = next.f.Kern(sbuf, ppem, prev.r, next.r)\n\t\t}\n\t\t// Break the line if we're out of space.\n\t\tif prev.idx > 0 && next.x+next.adv+k > maxDotX {\n\t\t\t// If the line contains no word breaks, break off the last rune.\n\t\t\tif word.idx == 0 {\n\t\t\t\tword = prev\n\t\t\t}\n\t\t\tnext.x -= word.x + word.adv\n\t\t\tnext.idx -= word.idx\n\t\t\tnext.len -= word.len\n\t\t\tprev = word\n\t\t\tendLine()\n\t\t} else if k != 0 {\n\t\t\tglyphs[prev.idx-1].Advance += k\n\t\t\tnext.x += k\n\t\t}\n\t\tg.Advance = next.adv\n\t\tif unicode.IsSpace(g.Rune) {\n\t\t\tword = next\n\t\t}\n\t\tprev = next\n\t}\n\tendLine()\n\treturn lines, nil\n}\n\n// toLayout converts a slice of glyphs to a text.Layout.\nfunc toLayout(glyphs []glyph) text.Layout {\n\tvar buf bytes.Buffer\n\tadvs := make([]fixed.Int26_6, len(glyphs))\n\tfor i, g := range glyphs {\n\t\tbuf.WriteRune(g.Rune)\n\t\tadvs[i] = glyphs[i].Advance\n\t}\n\treturn text.Layout{Text: buf.String(), Advances: advs}\n}\n\nfunc textPath(buf *sfnt.Buffer, ppem fixed.Int26_6, fonts []*opentype, str text.Layout) clip.PathSpec {\n\tvar lastPos f32.Point\n\tvar builder clip.Path\n\tvar x fixed.Int26_6\n\tbuilder.Begin(new(op.Ops))\n\trune := 0\n\tfor _, r := range str.Text {\n\t\tif !unicode.IsSpace(r) {\n\t\t\tf := fontForGlyph(buf, fonts, r)\n\t\t\tif f == nil {\n\t\t\t\tcontinue\n\t\t\t}\n\t\t\tsegs, ok := f.LoadGlyph(buf, ppem, r)\n\t\t\tif !ok {\n\t\t\t\tcontinue\n\t\t\t}\n\t\t\t// Move to glyph position.\n\t\t\tpos := f32.Point{\n\t\t\t\tX: float32(x) / 64,\n\t\t\t}\n\t\t\tbuilder.Move(pos.Sub(lastPos))\n\t\t\tlastPos = pos\n\t\t\tvar lastArg f32.Point\n\t\t\t// Convert sfnt.Segments to relative segments.\n\t\t\tfor _, fseg := range segs {\n\t\t\t\tnargs := 1\n\t\t\t\tswitch fseg.Op {\n\t\t\t\tcase sfnt.SegmentOpQuadTo:\n\t\t\t\t\tnargs = 2\n\t\t\t\tcase sfnt.SegmentOpCubeTo:\n\t\t\t\t\tnargs = 3\n\t\t\t\t}\n\t\t\t\tvar args [3]f32.Point\n\t\t\t\tfor i := 0; i < nargs; i++ {\n\t\t\t\t\ta := f32.Point{\n\t\t\t\t\t\tX: float32(fseg.Args[i].X) / 64,\n\t\t\t\t\t\tY: float32(fseg.Args[i].Y) / 64,\n\t\t\t\t\t}\n\t\t\t\t\targs[i] = a.Sub(lastArg)\n\t\t\t\t\tif i == nargs-1 {\n\t\t\t\t\t\tlastArg = a\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t\tswitch fseg.Op {\n\t\t\t\tcase sfnt.SegmentOpMoveTo:\n\t\t\t\t\tbuilder.Move(args[0])\n\t\t\t\tcase sfnt.SegmentOpLineTo:\n\t\t\t\t\tbuilder.Line(args[0])\n\t\t\t\tcase sfnt.SegmentOpQuadTo:\n\t\t\t\t\tbuilder.Quad(args[0], args[1])\n\t\t\t\tcase sfnt.SegmentOpCubeTo:\n\t\t\t\t\tbuilder.Cube(args[0], args[1], args[2])\n\t\t\t\tdefault:\n\t\t\t\t\tpanic(\"unsupported segment op\")\n\t\t\t\t}\n\t\t\t}\n\t\t\tlastPos = lastPos.Add(lastArg)\n\t\t}\n\t\tx += str.Advances[rune]\n\t\trune++\n\t}\n\treturn builder.End()\n}\n\nfunc readGlyphs(r io.Reader) ([]glyph, error) {\n\tvar glyphs []glyph\n\tbuf := make([]byte, 0, 1024)\n\tfor {\n\t\tn, err := r.Read(buf[len(buf):cap(buf)])\n\t\tbuf = buf[:len(buf)+n]\n\t\tlim := len(buf)\n\t\t// Read full runes if possible.\n\t\tif err != io.EOF {\n\t\t\tlim -= utf8.UTFMax - 1\n\t\t}\n\t\ti := 0\n\t\tfor i < lim {\n\t\t\tc, s := utf8.DecodeRune(buf[i:])\n\t\t\ti += s\n\t\t\tglyphs = append(glyphs, glyph{Rune: c})\n\t\t}\n\t\tn = copy(buf, buf[i:])\n\t\tbuf = buf[:n]\n\t\tif err != nil {\n\t\t\tif err == io.EOF {\n\t\t\t\tbreak\n\t\t\t}\n\t\t\treturn nil, err\n\t\t}\n\t}\n\treturn glyphs, nil\n}\n\nfunc (f *opentype) HasGlyph(buf *sfnt.Buffer, r rune) bool {\n\tg, err := f.Font.GlyphIndex(buf, r)\n\treturn g != 0 && err == nil\n}\n\nfunc (f *opentype) GlyphAdvance(buf *sfnt.Buffer, ppem fixed.Int26_6, r rune) (advance fixed.Int26_6, ok bool) {\n\tg, err := f.Font.GlyphIndex(buf, r)\n\tif err != nil {\n\t\treturn 0, false\n\t}\n\tadv, err := f.Font.GlyphAdvance(buf, g, ppem, f.Hinting)\n\treturn adv, err == nil\n}\n\nfunc (f *opentype) Kern(buf *sfnt.Buffer, ppem fixed.Int26_6, r0, r1 rune) fixed.Int26_6 {\n\tg0, err := f.Font.GlyphIndex(buf, r0)\n\tif err != nil {\n\t\treturn 0\n\t}\n\tg1, err := f.Font.GlyphIndex(buf, r1)\n\tif err != nil {\n\t\treturn 0\n\t}\n\tadv, err := f.Font.Kern(buf, g0, g1, ppem, f.Hinting)\n\tif err != nil {\n\t\treturn 0\n\t}\n\treturn adv\n}\n\nfunc (f *opentype) Metrics(buf *sfnt.Buffer, ppem fixed.Int26_6) font.Metrics {\n\tm, _ := f.Font.Metrics(buf, ppem, f.Hinting)\n\treturn m\n}\n\nfunc (f *opentype) Bounds(buf *sfnt.Buffer, ppem fixed.Int26_6) fixed.Rectangle26_6 {\n\tr, _ := f.Font.Bounds(buf, ppem, f.Hinting)\n\treturn r\n}\n\nfunc (f *opentype) LoadGlyph(buf *sfnt.Buffer, ppem fixed.Int26_6, r rune) ([]sfnt.Segment, bool) {\n\tg, err := f.Font.GlyphIndex(buf, r)\n\tif err != nil {\n\t\treturn nil, false\n\t}\n\tsegs, err := f.Font.LoadGlyph(buf, g, ppem, nil)\n\tif err != nil {\n\t\treturn nil, false\n\t}\n\treturn segs, true\n}\n"
},
{
"path": "vendor/gioui.org/gesture/gesture.go",
"content": "// SPDX-License-Identifier: Unlicense OR MIT\n\n/*\nPackage gesture implements common pointer gestures.\n\nGestures accept low level pointer Events from an event\nQueue and detect higher level actions such as clicks\nand scrolling.\n*/\npackage gesture\n\nimport (\n\t\"image\"\n\t\"math\"\n\t\"runtime\"\n\t\"time\"\n\n\t\"gioui.org/f32\"\n\t\"gioui.org/internal/fling\"\n\t\"gioui.org/io/event\"\n\t\"gioui.org/io/key\"\n\t\"gioui.org/io/pointer\"\n\t\"gioui.org/op\"\n\t\"gioui.org/unit\"\n)\n\n// The duration is somewhat arbitrary.\nconst doubleClickDuration = 200 * time.Millisecond\n\n// Hover detects the hover gesture for a pointer area.\ntype Hover struct {\n\t// entered tracks whether the pointer is inside the gesture.\n\tentered bool\n\t// pid is the pointer.ID.\n\tpid pointer.ID\n}\n\n// Add the gesture to detect hovering over the current pointer area.\nfunc (h *Hover) Add(ops *op.Ops) {\n\tpointer.InputOp{\n\t\tTag: h,\n\t\tTypes: pointer.Enter | pointer.Leave,\n\t}.Add(ops)\n}\n\n// Hovered returns whether a pointer is inside the area.\nfunc (h *Hover) Hovered(q event.Queue) bool {\n\tfor _, ev := range q.Events(h) {\n\t\te, ok := ev.(pointer.Event)\n\t\tif !ok {\n\t\t\tcontinue\n\t\t}\n\t\tswitch e.Type {\n\t\tcase pointer.Leave:\n\t\t\tif h.entered && h.pid == e.PointerID {\n\t\t\t\th.entered = false\n\t\t\t}\n\t\tcase pointer.Enter:\n\t\t\tif !h.entered {\n\t\t\t\th.pid = e.PointerID\n\t\t\t}\n\t\t\tif h.pid == e.PointerID {\n\t\t\t\th.entered = true\n\t\t\t}\n\t\t}\n\t}\n\treturn h.entered\n}\n\n// Click detects click gestures in the form\n// of ClickEvents.\ntype Click struct {\n\t// clickedAt is the timestamp at which\n\t// the last click occurred.\n\tclickedAt time.Duration\n\t// clicks is incremented if successive clicks\n\t// are performed within a fixed duration.\n\tclicks int\n\t// pressed tracks whether the pointer is pressed.\n\tpressed bool\n\t// entered tracks whether the pointer is inside the gesture.\n\tentered bool\n\t// pid is the pointer.ID.\n\tpid pointer.ID\n}\n\n// ClickEvent represent a click action, either a\n// TypePress for the beginning of a click or a\n// TypeClick for a completed click.\ntype ClickEvent struct {\n\tType ClickType\n\tPosition f32.Point\n\tSource pointer.Source\n\tModifiers key.Modifiers\n\t// NumClicks records successive clicks occurring\n\t// within a short duration of each other.\n\tNumClicks int\n}\n\ntype ClickType uint8\n\n// Drag detects drag gestures in the form of pointer.Drag events.\ntype Drag struct {\n\tdragging bool\n\tpressed bool\n\tpid pointer.ID\n\tstart f32.Point\n\tgrab bool\n}\n\n// Scroll detects scroll gestures and reduces them to\n// scroll distances. Scroll recognizes mouse wheel\n// movements as well as drag and fling touch gestures.\ntype Scroll struct {\n\tdragging bool\n\taxis Axis\n\testimator fling.Extrapolation\n\tflinger fling.Animation\n\tpid pointer.ID\n\tgrab bool\n\tlast int\n\t// Leftover scroll.\n\tscroll float32\n}\n\ntype ScrollState uint8\n\ntype Axis uint8\n\nconst (\n\tHorizontal Axis = iota\n\tVertical\n\tBoth\n)\n\nconst (\n\t// TypePress is reported for the first pointer\n\t// press.\n\tTypePress ClickType = iota\n\t// TypeClick is reported when a click action\n\t// is complete.\n\tTypeClick\n\t// TypeCancel is reported when the gesture is\n\t// cancelled.\n\tTypeCancel\n)\n\nconst (\n\t// StateIdle is the default scroll state.\n\tStateIdle ScrollState = iota\n\t// StateDragging is reported during drag gestures.\n\tStateDragging\n\t// StateFlinging is reported when a fling is\n\t// in progress.\n\tStateFlinging\n)\n\nvar touchSlop = unit.Dp(3)\n\n// Add the handler to the operation list to receive click events.\nfunc (c *Click) Add(ops *op.Ops) {\n\tpointer.InputOp{\n\t\tTag: c,\n\t\tTypes: pointer.Press | pointer.Release | pointer.Enter | pointer.Leave,\n\t}.Add(ops)\n}\n\n// Hovered returns whether a pointer is inside the area.\nfunc (c *Click) Hovered() bool {\n\treturn c.entered\n}\n\n// Pressed returns whether a pointer is pressing.\nfunc (c *Click) Pressed() bool {\n\treturn c.pressed\n}\n\n// Events returns the next click events, if any.\nfunc (c *Click) Events(q event.Queue) []ClickEvent {\n\tvar events []ClickEvent\n\tfor _, evt := range q.Events(c) {\n\t\te, ok := evt.(pointer.Event)\n\t\tif !ok {\n\t\t\tcontinue\n\t\t}\n\t\tswitch e.Type {\n\t\tcase pointer.Release:\n\t\t\tif !c.pressed || c.pid != e.PointerID {\n\t\t\t\tbreak\n\t\t\t}\n\t\t\tc.pressed = false\n\t\t\tif c.entered {\n\t\t\t\tif e.Time-c.clickedAt < doubleClickDuration {\n\t\t\t\t\tc.clicks++\n\t\t\t\t} else {\n\t\t\t\t\tc.clicks = 1\n\t\t\t\t}\n\t\t\t\tc.clickedAt = e.Time\n\t\t\t\tevents = append(events, ClickEvent{Type: TypeClick, Position: e.Position, Source: e.Source, Modifiers: e.Modifiers, NumClicks: c.clicks})\n\t\t\t} else {\n\t\t\t\tevents = append(events, ClickEvent{Type: TypeCancel})\n\t\t\t}\n\t\tcase pointer.Cancel:\n\t\t\twasPressed := c.pressed\n\t\t\tc.pressed = false\n\t\t\tc.entered = false\n\t\t\tif wasPressed {\n\t\t\t\tevents = append(events, ClickEvent{Type: TypeCancel})\n\t\t\t}\n\t\tcase pointer.Press:\n\t\t\tif c.pressed {\n\t\t\t\tbreak\n\t\t\t}\n\t\t\tif e.Source == pointer.Mouse && e.Buttons != pointer.ButtonPrimary {\n\t\t\t\tbreak\n\t\t\t}\n\t\t\tif !c.entered {\n\t\t\t\tc.pid = e.PointerID\n\t\t\t}\n\t\t\tif c.pid != e.PointerID {\n\t\t\t\tbreak\n\t\t\t}\n\t\t\tc.pressed = true\n\t\t\tevents = append(events, ClickEvent{Type: TypePress, Position: e.Position, Source: e.Source, Modifiers: e.Modifiers})\n\t\tcase pointer.Leave:\n\t\t\tif !c.pressed {\n\t\t\t\tc.pid = e.PointerID\n\t\t\t}\n\t\t\tif c.pid == e.PointerID {\n\t\t\t\tc.entered = false\n\t\t\t}\n\t\tcase pointer.Enter:\n\t\t\tif !c.pressed {\n\t\t\t\tc.pid = e.PointerID\n\t\t\t}\n\t\t\tif c.pid == e.PointerID {\n\t\t\t\tc.entered = true\n\t\t\t}\n\t\t}\n\t}\n\treturn events\n}\n\nfunc (ClickEvent) ImplementsEvent() {}\n\n// Add the handler to the operation list to receive scroll events.\n// The bounds variable refers to the scrolling boundaries\n// as defined in io/pointer.InputOp.\nfunc (s *Scroll) Add(ops *op.Ops, bounds image.Rectangle) {\n\toph := pointer.InputOp{\n\t\tTag: s,\n\t\tGrab: s.grab,\n\t\tTypes: pointer.Press | pointer.Drag | pointer.Release | pointer.Scroll,\n\t\tScrollBounds: bounds,\n\t}\n\toph.Add(ops)\n\tif s.flinger.Active() {\n\t\top.InvalidateOp{}.Add(ops)\n\t}\n}\n\n// Stop any remaining fling movement.\nfunc (s *Scroll) Stop() {\n\ts.flinger = fling.Animation{}\n}\n\n// Scroll detects the scrolling distance from the available events and\n// ongoing fling gestures.\nfunc (s *Scroll) Scroll(cfg unit.Metric, q event.Queue, t time.Time, axis Axis) int {\n\tif s.axis != axis {\n\t\ts.axis = axis\n\t\treturn 0\n\t}\n\ttotal := 0\n\tfor _, evt := range q.Events(s) {\n\t\te, ok := evt.(pointer.Event)\n\t\tif !ok {\n\t\t\tcontinue\n\t\t}\n\t\tswitch e.Type {\n\t\tcase pointer.Press:\n\t\t\tif s.dragging {\n\t\t\t\tbreak\n\t\t\t}\n\t\t\t// Only scroll on touch drags, or on Android where mice\n\t\t\t// drags also scroll by convention.\n\t\t\tif e.Source != pointer.Touch && runtime.GOOS != \"android\" {\n\t\t\t\tbreak\n\t\t\t}\n\t\t\ts.Stop()\n\t\t\ts.estimator = fling.Extrapolation{}\n\t\t\tv := s.val(e.Position)\n\t\t\ts.last = int(math.Round(float64(v)))\n\t\t\ts.estimator.Sample(e.Time, v)\n\t\t\ts.dragging = true\n\t\t\ts.pid = e.PointerID\n\t\tcase pointer.Release:\n\t\t\tif s.pid != e.PointerID {\n\t\t\t\tbreak\n\t\t\t}\n\t\t\tfling := s.estimator.Estimate()\n\t\t\tif slop, d := float32(cfg.Px(touchSlop)), fling.Distance; d < -slop || d > slop {\n\t\t\t\ts.flinger.Start(cfg, t, fling.Velocity)\n\t\t\t}\n\t\t\tfallthrough\n\t\tcase pointer.Cancel:\n\t\t\ts.dragging = false\n\t\t\ts.grab = false\n\t\tcase pointer.Scroll:\n\t\t\tswitch s.axis {\n\t\t\tcase Horizontal:\n\t\t\t\ts.scroll += e.Scroll.X\n\t\t\tcase Vertical:\n\t\t\t\ts.scroll += e.Scroll.Y\n\t\t\t}\n\t\t\tiscroll := int(s.scroll)\n\t\t\ts.scroll -= float32(iscroll)\n\t\t\ttotal += iscroll\n\t\tcase pointer.Drag:\n\t\t\tif !s.dragging || s.pid != e.PointerID {\n\t\t\t\tcontinue\n\t\t\t}\n\t\t\tval := s.val(e.Position)\n\t\t\ts.estimator.Sample(e.Time, val)\n\t\t\tv := int(math.Round(float64(val)))\n\t\t\tdist := s.last - v\n\t\t\tif e.Priority < pointer.Grabbed {\n\t\t\t\tslop := cfg.Px(touchSlop)\n\t\t\t\tif dist := dist; dist >= slop || -slop >= dist {\n\t\t\t\t\ts.grab = true\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\ts.last = v\n\t\t\t\ttotal += dist\n\t\t\t}\n\t\t}\n\t}\n\ttotal += s.flinger.Tick(t)\n\treturn total\n}\n\nfunc (s *Scroll) val(p f32.Point) float32 {\n\tif s.axis == Horizontal {\n\t\treturn p.X\n\t} else {\n\t\treturn p.Y\n\t}\n}\n\n// State reports the scroll state.\nfunc (s *Scroll) State() ScrollState {\n\tswitch {\n\tcase s.flinger.Active():\n\t\treturn StateFlinging\n\tcase s.dragging:\n\t\treturn StateDragging\n\tdefault:\n\t\treturn StateIdle\n\t}\n}\n\n// Add the handler to the operation list to receive drag events.\nfunc (d *Drag) Add(ops *op.Ops) {\n\tpointer.InputOp{\n\t\tTag: d,\n\t\tGrab: d.grab,\n\t\tTypes: pointer.Press | pointer.Drag | pointer.Release,\n\t}.Add(ops)\n}\n\n// Events returns the next drag events, if any.\nfunc (d *Drag) Events(cfg unit.Metric, q event.Queue, axis Axis) []pointer.Event {\n\tvar events []pointer.Event\n\tfor _, e := range q.Events(d) {\n\t\te, ok := e.(pointer.Event)\n\t\tif !ok {\n\t\t\tcontinue\n\t\t}\n\n\t\tswitch e.Type {\n\t\tcase pointer.Press:\n\t\t\tif !(e.Buttons == pointer.ButtonPrimary || e.Source == pointer.Touch) {\n\t\t\t\tcontinue\n\t\t\t}\n\t\t\td.pressed = true\n\t\t\tif d.dragging {\n\t\t\t\tcontinue\n\t\t\t}\n\t\t\td.dragging = true\n\t\t\td.pid = e.PointerID\n\t\t\td.start = e.Position\n\t\tcase pointer.Drag:\n\t\t\tif !d.dragging || e.PointerID != d.pid {\n\t\t\t\tcontinue\n\t\t\t}\n\t\t\tswitch axis {\n\t\t\tcase Horizontal:\n\t\t\t\te.Position.Y = d.start.Y\n\t\t\tcase Vertical:\n\t\t\t\te.Position.X = d.start.X\n\t\t\tcase Both:\n\t\t\t\t// Do nothing\n\t\t\t}\n\t\t\tif e.Priority < pointer.Grabbed {\n\t\t\t\tdiff := e.Position.Sub(d.start)\n\t\t\t\tslop := cfg.Px(touchSlop)\n\t\t\t\tif diff.X*diff.X+diff.Y*diff.Y > float32(slop*slop) {\n\t\t\t\t\td.grab = true\n\t\t\t\t}\n\t\t\t}\n\t\tcase pointer.Release, pointer.Cancel:\n\t\t\td.pressed = false\n\t\t\tif !d.dragging || e.PointerID != d.pid {\n\t\t\t\tcontinue\n\t\t\t}\n\t\t\td.dragging = false\n\t\t\td.grab = false\n\t\t}\n\n\t\tevents = append(events, e)\n\t}\n\n\treturn events\n}\n\n// Dragging reports whether it is currently in use.\nfunc (d *Drag) Dragging() bool { return d.dragging }\n\n// Pressed returns whether a pointer is pressing.\nfunc (d *Drag) Pressed() bool { return d.pressed }\n\nfunc (a Axis) String() string {\n\tswitch a {\n\tcase Horizontal:\n\t\treturn \"Horizontal\"\n\tcase Vertical:\n\t\treturn \"Vertical\"\n\tdefault:\n\t\tpanic(\"invalid Axis\")\n\t}\n}\n\nfunc (ct ClickType) String() string {\n\tswitch ct {\n\tcase TypePress:\n\t\treturn \"TypePress\"\n\tcase TypeClick:\n\t\treturn \"TypeClick\"\n\tcase TypeCancel:\n\t\treturn \"TypeCancel\"\n\tdefault:\n\t\tpanic(\"invalid ClickType\")\n\t}\n}\n\nfunc (s ScrollState) String() string {\n\tswitch s {\n\tcase StateIdle:\n\t\treturn \"StateIdle\"\n\tcase StateDragging:\n\t\treturn \"StateDragging\"\n\tcase StateFlinging:\n\t\treturn \"StateFlinging\"\n\tdefault:\n\t\tpanic(\"unreachable\")\n\t}\n}\n"
},
{
"path": "vendor/gioui.org/gpu/api.go",
"content": "// SPDX-License-Identifier: Unlicense OR MIT\n\npackage gpu\n\nimport \"gioui.org/gpu/internal/driver\"\n\n// An API carries the necessary GPU API specific resources to create a Device.\n// There is an API type for each supported GPU API such as OpenGL and Direct3D.\ntype API = driver.API\n\n// A RenderTarget denotes the destination framebuffer for a frame.\ntype RenderTarget = driver.RenderTarget\n\n// OpenGLRenderTarget is a render target suitable for the OpenGL backend.\ntype OpenGLRenderTarget = driver.OpenGLRenderTarget\n\n// Direct3D11RenderTarget is a render target suitable for the Direct3D 11 backend.\ntype Direct3D11RenderTarget = driver.Direct3D11RenderTarget\n\n// MetalRenderTarget is a render target suitable for the Metal backend.\ntype MetalRenderTarget = driver.MetalRenderTarget\n\n// VulkanRenderTarget is a render target suitable for the Vulkan backend.\ntype VulkanRenderTarget = driver.VulkanRenderTarget\n\n// OpenGL denotes the OpenGL or OpenGL ES API.\ntype OpenGL = driver.OpenGL\n\n// Direct3D11 denotes the Direct3D API.\ntype Direct3D11 = driver.Direct3D11\n\n// Metal denotes the Apple Metal API.\ntype Metal = driver.Metal\n\n// Vulkan denotes the Vulkan API.\ntype Vulkan = driver.Vulkan\n\n// ErrDeviceLost is returned from GPU operations when the underlying GPU device\n// is lost and should be recreated.\nvar ErrDeviceLost = driver.ErrDeviceLost\n"
},
{
"path": "vendor/gioui.org/gpu/caches.go",
"content": "// SPDX-License-Identifier: Unlicense OR MIT\n\npackage gpu\n\nimport (\n\t\"fmt\"\n\n\t\"gioui.org/f32\"\n)\n\ntype resourceCache struct {\n\tres map[interface{}]resource\n\tnewRes map[interface{}]resource\n}\n\n// opCache is like a resourceCache but using concrete types and a\n// freelist instead of two maps to avoid runtime.mapaccess2 calls\n// since benchmarking showed them as a bottleneck.\ntype opCache struct {\n\t// store the index + 1 in cache this key is stored in\n\tindex map[opKey]int\n\t// list of indexes in cache that are free and can be used\n\tfreelist []int\n\tcache []opCacheValue\n}\n\ntype opCacheValue struct {\n\tdata pathData\n\n\tbounds f32.Rectangle\n\t// the fields below are handled by opCache\n\tkey opKey\n\tkeep bool\n}\n\nfunc newResourceCache() *resourceCache {\n\treturn &resourceCache{\n\t\tres: make(map[interface{}]resource),\n\t\tnewRes: make(map[interface{}]resource),\n\t}\n}\n\nfunc (r *resourceCache) get(key interface{}) (resource, bool) {\n\tv, exists := r.res[key]\n\tif exists {\n\t\tr.newRes[key] = v\n\t}\n\treturn v, exists\n}\n\nfunc (r *resourceCache) put(key interface{}, val resource) {\n\tif _, exists := r.newRes[key]; exists {\n\t\tpanic(fmt.Errorf(\"key exists, %p\", key))\n\t}\n\tr.res[key] = val\n\tr.newRes[key] = val\n}\n\nfunc (r *resourceCache) frame() {\n\tfor k, v := range r.res {\n\t\tif _, exists := r.newRes[k]; !exists {\n\t\t\tdelete(r.res, k)\n\t\t\tv.release()\n\t\t}\n\t}\n\tfor k, v := range r.newRes {\n\t\tdelete(r.newRes, k)\n\t\tr.res[k] = v\n\t}\n}\n\nfunc (r *resourceCache) release() {\n\tr.frame()\n\tfor _, v := range r.res {\n\t\tv.release()\n\t}\n\tr.newRes = nil\n\tr.res = nil\n}\n\nfunc newOpCache() *opCache {\n\treturn &opCache{\n\t\tindex: make(map[opKey]int),\n\t\tfreelist: make([]int, 0),\n\t\tcache: make([]opCacheValue, 0),\n\t}\n}\n\nfunc (r *opCache) get(key opKey) (o opCacheValue, exist bool) {\n\tv := r.index[key]\n\tif v == 0 {\n\t\treturn\n\t}\n\tr.cache[v-1].keep = true\n\treturn r.cache[v-1], true\n}\n\nfunc (r *opCache) put(key opKey, val opCacheValue) {\n\tv := r.index[key]\n\tval.keep = true\n\tval.key = key\n\tif v == 0 {\n\t\t// not in cache\n\t\ti := len(r.cache)\n\t\tif len(r.freelist) > 0 {\n\t\t\ti = r.freelist[len(r.freelist)-1]\n\t\t\tr.freelist = r.freelist[:len(r.freelist)-1]\n\t\t\tr.cache[i] = val\n\t\t} else {\n\t\t\tr.cache = append(r.cache, val)\n\t\t}\n\t\tr.index[key] = i + 1\n\t} else {\n\t\tr.cache[v-1] = val\n\t}\n}\n\nfunc (r *opCache) frame() {\n\tr.freelist = r.freelist[:0]\n\tfor i, v := range r.cache {\n\t\tr.cache[i].keep = false\n\t\tif v.keep {\n\t\t\tcontinue\n\t\t}\n\t\tif v.data.data != nil {\n\t\t\tv.data.release()\n\t\t\tr.cache[i].data.data = nil\n\t\t}\n\t\tdelete(r.index, v.key)\n\t\tr.freelist = append(r.freelist, i)\n\t}\n}\n\nfunc (r *opCache) release() {\n\tfor i := range r.cache {\n\t\tr.cache[i].keep = false\n\t}\n\tr.frame()\n\tr.index = nil\n\tr.freelist = nil\n\tr.cache = nil\n}\n"
},
{
"path": "vendor/gioui.org/gpu/clip.go",
"content": "package gpu\n\nimport (\n\t\"gioui.org/f32\"\n\t\"gioui.org/internal/stroke\"\n)\n\ntype quadSplitter struct {\n\tbounds f32.Rectangle\n\tcontour uint32\n\td *drawOps\n}\n\nfunc encodeQuadTo(data []byte, meta uint32, from, ctrl, to f32.Point) {\n\t// NW.\n\tencodeVertex(data, meta, -1, 1, from, ctrl, to)\n\t// NE.\n\tencodeVertex(data[vertStride:], meta, 1, 1, from, ctrl, to)\n\t// SW.\n\tencodeVertex(data[vertStride*2:], meta, -1, -1, from, ctrl, to)\n\t// SE.\n\tencodeVertex(data[vertStride*3:], meta, 1, -1, from, ctrl, to)\n}\n\nfunc encodeVertex(data []byte, meta uint32, cornerx, cornery int16, from, ctrl, to f32.Point) {\n\tvar corner float32\n\tif cornerx == 1 {\n\t\tcorner += .5\n\t}\n\tif cornery == 1 {\n\t\tcorner += .25\n\t}\n\tv := vertex{\n\t\tCorner: corner,\n\t\tFromX: from.X,\n\t\tFromY: from.Y,\n\t\tCtrlX: ctrl.X,\n\t\tCtrlY: ctrl.Y,\n\t\tToX: to.X,\n\t\tToY: to.Y,\n\t}\n\tv.encode(data, meta)\n}\n\nfunc (qs *quadSplitter) encodeQuadTo(from, ctrl, to f32.Point) {\n\tdata := qs.d.writeVertCache(vertStride * 4)\n\tencodeQuadTo(data, qs.contour, from, ctrl, to)\n}\n\nfunc (qs *quadSplitter) splitAndEncode(quad stroke.QuadSegment) {\n\tcbnd := f32.Rectangle{\n\t\tMin: quad.From,\n\t\tMax: quad.To,\n\t}.Canon()\n\tfrom, ctrl, to := quad.From, quad.Ctrl, quad.To\n\n\t// If the curve contain areas where a vertical line\n\t// intersects it twice, split the curve in two x monotone\n\t// lower and upper curves. The stencil fragment program\n\t// expects only one intersection per curve.\n\n\t// Find the t where the derivative in x is 0.\n\tv0 := ctrl.Sub(from)\n\tv1 := to.Sub(ctrl)\n\td := v0.X - v1.X\n\t// t = v0 / d. Split if t is in ]0;1[.\n\tif v0.X > 0 && d > v0.X || v0.X < 0 && d < v0.X {\n\t\tt := v0.X / d\n\t\tctrl0 := from.Mul(1 - t).Add(ctrl.Mul(t))\n\t\tctrl1 := ctrl.Mul(1 - t).Add(to.Mul(t))\n\t\tmid := ctrl0.Mul(1 - t).Add(ctrl1.Mul(t))\n\t\tqs.encodeQuadTo(from, ctrl0, mid)\n\t\tqs.encodeQuadTo(mid, ctrl1, to)\n\t\tif mid.X > cbnd.Max.X {\n\t\t\tcbnd.Max.X = mid.X\n\t\t}\n\t\tif mid.X < cbnd.Min.X {\n\t\t\tcbnd.Min.X = mid.X\n\t\t}\n\t} else {\n\t\tqs.encodeQuadTo(from, ctrl, to)\n\t}\n\t// Find the y extremum, if any.\n\td = v0.Y - v1.Y\n\tif v0.Y > 0 && d > v0.Y || v0.Y < 0 && d < v0.Y {\n\t\tt := v0.Y / d\n\t\ty := (1-t)*(1-t)*from.Y + 2*(1-t)*t*ctrl.Y + t*t*to.Y\n\t\tif y > cbnd.Max.Y {\n\t\t\tcbnd.Max.Y = y\n\t\t}\n\t\tif y < cbnd.Min.Y {\n\t\t\tcbnd.Min.Y = y\n\t\t}\n\t}\n\n\tqs.bounds = unionRect(qs.bounds, cbnd)\n}\n\n// Union is like f32.Rectangle.Union but ignores empty rectangles.\nfunc unionRect(r, s f32.Rectangle) f32.Rectangle {\n\tif r.Min.X > s.Min.X {\n\t\tr.Min.X = s.Min.X\n\t}\n\tif r.Min.Y > s.Min.Y {\n\t\tr.Min.Y = s.Min.Y\n\t}\n\tif r.Max.X < s.Max.X {\n\t\tr.Max.X = s.Max.X\n\t}\n\tif r.Max.Y < s.Max.Y {\n\t\tr.Max.Y = s.Max.Y\n\t}\n\treturn r\n}\n"
},
{
"path": "vendor/gioui.org/gpu/compute.go",
"content": "// SPDX-License-Identifier: Unlicense OR MIT\n\npackage gpu\n\nimport (\n\t\"bytes\"\n\t\"encoding/binary\"\n\t\"errors\"\n\t\"fmt\"\n\t\"hash/maphash\"\n\t\"image\"\n\t\"image/color\"\n\t\"image/draw\"\n\t\"image/png\"\n\t\"io/ioutil\"\n\t\"math\"\n\t\"math/bits\"\n\t\"runtime\"\n\t\"sort\"\n\t\"time\"\n\t\"unsafe\"\n\n\t\"gioui.org/cpu\"\n\t\"gioui.org/f32\"\n\t\"gioui.org/gpu/internal/driver\"\n\t\"gioui.org/internal/byteslice\"\n\t\"gioui.org/internal/f32color\"\n\t\"gioui.org/internal/ops\"\n\t\"gioui.org/internal/scene\"\n\t\"gioui.org/layout\"\n\t\"gioui.org/op\"\n\t\"gioui.org/shader\"\n\t\"gioui.org/shader/gio\"\n\t\"gioui.org/shader/piet\"\n)\n\ntype compute struct {\n\tctx driver.Device\n\n\tcollector collector\n\tenc encoder\n\ttexOps []textureOp\n\tviewport image.Point\n\tmaxTextureDim int\n\tsrgb bool\n\tatlases []*textureAtlas\n\tframeCount uint\n\tmoves []atlasMove\n\n\tprograms struct {\n\t\telements computeProgram\n\t\ttileAlloc computeProgram\n\t\tpathCoarse computeProgram\n\t\tbackdrop computeProgram\n\t\tbinning computeProgram\n\t\tcoarse computeProgram\n\t\tkernel4 computeProgram\n\t}\n\tbuffers struct {\n\t\tconfig sizedBuffer\n\t\tscene sizedBuffer\n\t\tstate sizedBuffer\n\t\tmemory sizedBuffer\n\t}\n\toutput struct {\n\t\tblitPipeline driver.Pipeline\n\n\t\tbuffer sizedBuffer\n\n\t\tuniforms *copyUniforms\n\t\tuniBuf driver.Buffer\n\n\t\tlayerVertices []layerVertex\n\t\tdescriptors *piet.Kernel4DescriptorSetLayout\n\n\t\tnullMaterials driver.Texture\n\t}\n\t// imgAllocs maps imageOpData.handles to allocs.\n\timgAllocs map[interface{}]*atlasAlloc\n\t// materials contains the pre-processed materials (transformed images for\n\t// now, gradients etc. later) packed in a texture atlas. The atlas is used\n\t// as source in kernel4.\n\tmaterials struct {\n\t\t// allocs maps texture ops the their atlases and FillImage offsets.\n\t\tallocs map[textureKey]materialAlloc\n\n\t\tpipeline driver.Pipeline\n\t\tbuffer sizedBuffer\n\t\tquads []materialVertex\n\t\tuniforms struct {\n\t\t\tu *materialUniforms\n\t\t\tbuf driver.Buffer\n\t\t}\n\t}\n\ttimers struct {\n\t\tprofile string\n\t\tt *timers\n\t\tcompact *timer\n\t\trender *timer\n\t\tblit *timer\n\t}\n\n\t// CPU fallback fields.\n\tuseCPU bool\n\tdispatcher *dispatcher\n\n\t// The following fields hold scratch space to avoid garbage.\n\tzeroSlice []byte\n\tmemHeader *memoryHeader\n\tconf *config\n}\n\ntype materialAlloc struct {\n\talloc *atlasAlloc\n\toffset image.Point\n}\n\ntype layer struct {\n\trect image.Rectangle\n\talloc *atlasAlloc\n\tops []paintOp\n\tmaterials *textureAtlas\n}\n\ntype allocQuery struct {\n\tatlas *textureAtlas\n\tsize image.Point\n\tempty bool\n\tformat driver.TextureFormat\n\tbindings driver.BufferBinding\n\tnocompact bool\n}\n\ntype atlasAlloc struct {\n\tatlas *textureAtlas\n\trect image.Rectangle\n\tcpu bool\n\tdead bool\n\tframeCount uint\n}\n\ntype atlasMove struct {\n\tsrc *textureAtlas\n\tdstPos image.Point\n\tsrcRect image.Rectangle\n\tcpu bool\n}\n\ntype textureAtlas struct {\n\timage driver.Texture\n\tformat driver.TextureFormat\n\tbindings driver.BufferBinding\n\thasCPU bool\n\tcpuImage cpu.ImageDescriptor\n\tsize image.Point\n\tallocs []*atlasAlloc\n\tpacker packer\n\trealized bool\n\tlastFrame uint\n\tcompact bool\n}\n\ntype copyUniforms struct {\n\tscale [2]float32\n\tpos [2]float32\n\tuvScale [2]float32\n\t_ [8]byte // Pad to 16 bytes.\n}\n\ntype materialUniforms struct {\n\tscale [2]float32\n\tpos [2]float32\n\temulatesRGB float32\n\t_ [12]byte // Pad to 16 bytes\n}\n\ntype collector struct {\n\thasher maphash.Hash\n\tprofile bool\n\treader ops.Reader\n\tstates []f32.Affine2D\n\tclear bool\n\tclearColor f32color.RGBA\n\tclipStates []clipState\n\torder []hashIndex\n\ttransStack []transEntry\n\tprevFrame opsCollector\n\tframe opsCollector\n}\n\ntype transEntry struct {\n\tt f32.Affine2D\n\trelTrans f32.Affine2D\n}\n\ntype hashIndex struct {\n\tindex int\n\thash uint64\n}\n\ntype opsCollector struct {\n\tpaths []byte\n\tclipCmds []clipCmd\n\tops []paintOp\n\tlayers []layer\n}\n\ntype paintOp struct {\n\tclipStack []clipCmd\n\toffset image.Point\n\tstate paintKey\n\tintersect f32.Rectangle\n\thash uint64\n\tlayer int\n\ttexOpIdx int\n}\n\n// clipCmd describes a clipping command ready to be used for the compute\n// pipeline.\ntype clipCmd struct {\n\t// union of the bounds of the operations that are clipped.\n\tunion f32.Rectangle\n\tstate clipKey\n\tpath []byte\n\tpathKey ops.Key\n\tabsBounds f32.Rectangle\n}\n\ntype encoderState struct {\n\trelTrans f32.Affine2D\n\tclip *clipState\n\n\tpaintKey\n}\n\n// clipKey completely describes a clip operation (along with its path) and is appropriate\n// for hashing and equality checks.\ntype clipKey struct {\n\tbounds f32.Rectangle\n\tstrokeWidth float32\n\trelTrans f32.Affine2D\n\tpathHash uint64\n}\n\n// paintKey completely defines a paint operation. It is suitable for hashing and\n// equality checks.\ntype paintKey struct {\n\tt f32.Affine2D\n\tmatType materialType\n\t// Current paint.ImageOp\n\timage imageOpData\n\t// Current paint.ColorOp, if any.\n\tcolor color.NRGBA\n\n\t// Current paint.LinearGradientOp.\n\tstop1 f32.Point\n\tstop2 f32.Point\n\tcolor1 color.NRGBA\n\tcolor2 color.NRGBA\n}\n\ntype clipState struct {\n\tabsBounds f32.Rectangle\n\tparent *clipState\n\tpath []byte\n\tpathKey ops.Key\n\tintersect f32.Rectangle\n\tpush bool\n\n\tclipKey\n}\n\ntype layerVertex struct {\n\tposX, posY float32\n\tu, v float32\n}\n\n// materialVertex describes a vertex of a quad used to render a transformed\n// material.\ntype materialVertex struct {\n\tposX, posY float32\n\tu, v float32\n}\n\n// textureKey identifies textureOp.\ntype textureKey struct {\n\thandle interface{}\n\ttransform f32.Affine2D\n\tbounds image.Rectangle\n}\n\n// textureOp represents an paintOp that requires texture space.\ntype textureOp struct {\n\timg imageOpData\n\tkey textureKey\n\t// offset is the integer offset separated from key.transform to increase cache hit rate.\n\toff image.Point\n\t// matAlloc is the atlas placement for material.\n\tmatAlloc materialAlloc\n\t// imgAlloc is the atlas placement for the source image\n\timgAlloc *atlasAlloc\n}\n\ntype encoder struct {\n\tscene []scene.Command\n\tnpath int\n\tnpathseg int\n\tntrans int\n}\n\ntype encodeState struct {\n\ttrans f32.Affine2D\n\tclip f32.Rectangle\n}\n\n// sizedBuffer holds a GPU buffer, or its equivalent CPU memory.\ntype sizedBuffer struct {\n\tsize int\n\tbuffer driver.Buffer\n\t// cpuBuf is initialized when useCPU is true.\n\tcpuBuf cpu.BufferDescriptor\n}\n\n// computeProgram holds a compute program, or its equivalent CPU implementation.\ntype computeProgram struct {\n\tprog driver.Program\n\n\t// CPU fields.\n\tprogInfo *cpu.ProgramInfo\n\tdescriptors unsafe.Pointer\n\tbuffers []*cpu.BufferDescriptor\n}\n\n// config matches Config in setup.h\ntype config struct {\n\tn_elements uint32 // paths\n\tn_pathseg uint32\n\twidth_in_tiles uint32\n\theight_in_tiles uint32\n\ttile_alloc memAlloc\n\tbin_alloc memAlloc\n\tptcl_alloc memAlloc\n\tpathseg_alloc memAlloc\n\tanno_alloc memAlloc\n\ttrans_alloc memAlloc\n}\n\n// memAlloc matches Alloc in mem.h\ntype memAlloc struct {\n\toffset uint32\n\t//size uint32\n}\n\n// memoryHeader matches the header of Memory in mem.h.\ntype memoryHeader struct {\n\tmem_offset uint32\n\tmem_error uint32\n}\n\n// rect is a oriented rectangle.\ntype rectangle [4]f32.Point\n\nconst (\n\tlayersBindings = driver.BufferBindingShaderStorageWrite | driver.BufferBindingTexture\n\tmaterialsBindings = driver.BufferBindingFramebuffer | driver.BufferBindingShaderStorageRead\n\t// Materials and layers can share texture storage if their bindings match.\n\tcombinedBindings = layersBindings | materialsBindings\n)\n\n// GPU structure sizes and constants.\nconst (\n\ttileWidthPx = 32\n\ttileHeightPx = 32\n\tptclInitialAlloc = 1024\n\tkernel4OutputUnit = 2\n\tkernel4AtlasUnit = 3\n\n\tpathSize = 12\n\tbinSize = 8\n\tpathsegSize = 52\n\tannoSize = 32\n\ttransSize = 24\n\tstateSize = 60\n\tstateStride = 4 + 2*stateSize\n)\n\n// mem.h constants.\nconst (\n\tmemNoError = 0 // NO_ERROR\n\tmemMallocFailed = 1 // ERR_MALLOC_FAILED\n)\n\nfunc newCompute(ctx driver.Device) (*compute, error) {\n\tcaps := ctx.Caps()\n\tmaxDim := caps.MaxTextureSize\n\t// Large atlas textures cause artifacts due to precision loss in\n\t// shaders.\n\tif cap := 8192; maxDim > cap {\n\t\tmaxDim = cap\n\t}\n\t// The compute programs can only span 128x64 tiles. Limit to 64 for now, and leave the\n\t// complexity of a rectangular limit for later.\n\tif computeCap := 4096; maxDim > computeCap {\n\t\tmaxDim = computeCap\n\t}\n\tg := &compute{\n\t\tctx: ctx,\n\t\tmaxTextureDim: maxDim,\n\t\tsrgb: caps.Features.Has(driver.FeatureSRGB),\n\t\tconf: new(config),\n\t\tmemHeader: new(memoryHeader),\n\t}\n\tnull, err := ctx.NewTexture(driver.TextureFormatRGBA8, 1, 1, driver.FilterNearest, driver.FilterNearest, driver.BufferBindingShaderStorageRead)\n\tif err != nil {\n\t\tg.Release()\n\t\treturn nil, err\n\t}\n\tg.output.nullMaterials = null\n\tshaders := []struct {\n\t\tprog *computeProgram\n\t\tsrc shader.Sources\n\t\tinfo *cpu.ProgramInfo\n\t}{\n\t\t{&g.programs.elements, piet.Shader_elements_comp, piet.ElementsProgramInfo},\n\t\t{&g.programs.tileAlloc, piet.Shader_tile_alloc_comp, piet.Tile_allocProgramInfo},\n\t\t{&g.programs.pathCoarse, piet.Shader_path_coarse_comp, piet.Path_coarseProgramInfo},\n\t\t{&g.programs.backdrop, piet.Shader_backdrop_comp, piet.BackdropProgramInfo},\n\t\t{&g.programs.binning, piet.Shader_binning_comp, piet.BinningProgramInfo},\n\t\t{&g.programs.coarse, piet.Shader_coarse_comp, piet.CoarseProgramInfo},\n\t\t{&g.programs.kernel4, piet.Shader_kernel4_comp, piet.Kernel4ProgramInfo},\n\t}\n\tif !caps.Features.Has(driver.FeatureCompute) {\n\t\tif !cpu.Supported {\n\t\t\treturn nil, errors.New(\"gpu: missing support for compute programs\")\n\t\t}\n\t\tg.useCPU = true\n\t}\n\tif g.useCPU {\n\t\tg.dispatcher = newDispatcher(runtime.NumCPU())\n\t}\n\n\tcopyVert, copyFrag, err := newShaders(ctx, gio.Shader_copy_vert, gio.Shader_copy_frag)\n\tif err != nil {\n\t\tg.Release()\n\t\treturn nil, err\n\t}\n\tdefer copyVert.Release()\n\tdefer copyFrag.Release()\n\tpipe, err := ctx.NewPipeline(driver.PipelineDesc{\n\t\tVertexShader: copyVert,\n\t\tFragmentShader: copyFrag,\n\t\tVertexLayout: driver.VertexLayout{\n\t\t\tInputs: []driver.InputDesc{\n\t\t\t\t{Type: shader.DataTypeFloat, Size: 2, Offset: 0},\n\t\t\t\t{Type: shader.DataTypeFloat, Size: 2, Offset: 4 * 2},\n\t\t\t},\n\t\t\tStride: int(unsafe.Sizeof(g.output.layerVertices[0])),\n\t\t},\n\t\tPixelFormat: driver.TextureFormatOutput,\n\t\tBlendDesc: driver.BlendDesc{\n\t\t\tEnable: true,\n\t\t\tSrcFactor: driver.BlendFactorOne,\n\t\t\tDstFactor: driver.BlendFactorOneMinusSrcAlpha,\n\t\t},\n\t\tTopology: driver.TopologyTriangles,\n\t})\n\tif err != nil {\n\t\tg.Release()\n\t\treturn nil, err\n\t}\n\tg.output.blitPipeline = pipe\n\tg.output.uniforms = new(copyUniforms)\n\n\tbuf, err := ctx.NewBuffer(driver.BufferBindingUniforms, int(unsafe.Sizeof(*g.output.uniforms)))\n\tif err != nil {\n\t\tg.Release()\n\t\treturn nil, err\n\t}\n\tg.output.uniBuf = buf\n\n\tmaterialVert, materialFrag, err := newShaders(ctx, gio.Shader_material_vert, gio.Shader_material_frag)\n\tif err != nil {\n\t\tg.Release()\n\t\treturn nil, err\n\t}\n\tdefer materialVert.Release()\n\tdefer materialFrag.Release()\n\tpipe, err = ctx.NewPipeline(driver.PipelineDesc{\n\t\tVertexShader: materialVert,\n\t\tFragmentShader: materialFrag,\n\t\tVertexLayout: driver.VertexLayout{\n\t\t\tInputs: []driver.InputDesc{\n\t\t\t\t{Type: shader.DataTypeFloat, Size: 2, Offset: 0},\n\t\t\t\t{Type: shader.DataTypeFloat, Size: 2, Offset: 4 * 2},\n\t\t\t},\n\t\t\tStride: int(unsafe.Sizeof(g.materials.quads[0])),\n\t\t},\n\t\tPixelFormat: driver.TextureFormatRGBA8,\n\t\tTopology: driver.TopologyTriangles,\n\t})\n\tif err != nil {\n\t\tg.Release()\n\t\treturn nil, err\n\t}\n\tg.materials.pipeline = pipe\n\tg.materials.uniforms.u = new(materialUniforms)\n\n\tbuf, err = ctx.NewBuffer(driver.BufferBindingUniforms, int(unsafe.Sizeof(*g.materials.uniforms.u)))\n\tif err != nil {\n\t\tg.Release()\n\t\treturn nil, err\n\t}\n\tg.materials.uniforms.buf = buf\n\n\tfor _, shader := range shaders {\n\t\tif !g.useCPU {\n\t\t\tp, err := ctx.NewComputeProgram(shader.src)\n\t\t\tif err != nil {\n\t\t\t\tg.Release()\n\t\t\t\treturn nil, err\n\t\t\t}\n\t\t\tshader.prog.prog = p\n\t\t} else {\n\t\t\tshader.prog.progInfo = shader.info\n\t\t}\n\t}\n\tif g.useCPU {\n\t\t{\n\t\t\tdesc := new(piet.ElementsDescriptorSetLayout)\n\t\t\tg.programs.elements.descriptors = unsafe.Pointer(desc)\n\t\t\tg.programs.elements.buffers = []*cpu.BufferDescriptor{desc.Binding0(), desc.Binding1(), desc.Binding2(), desc.Binding3()}\n\t\t}\n\t\t{\n\t\t\tdesc := new(piet.Tile_allocDescriptorSetLayout)\n\t\t\tg.programs.tileAlloc.descriptors = unsafe.Pointer(desc)\n\t\t\tg.programs.tileAlloc.buffers = []*cpu.BufferDescriptor{desc.Binding0(), desc.Binding1()}\n\t\t}\n\t\t{\n\t\t\tdesc := new(piet.Path_coarseDescriptorSetLayout)\n\t\t\tg.programs.pathCoarse.descriptors = unsafe.Pointer(desc)\n\t\t\tg.programs.pathCoarse.buffers = []*cpu.BufferDescriptor{desc.Binding0(), desc.Binding1()}\n\t\t}\n\t\t{\n\t\t\tdesc := new(piet.BackdropDescriptorSetLayout)\n\t\t\tg.programs.backdrop.descriptors = unsafe.Pointer(desc)\n\t\t\tg.programs.backdrop.buffers = []*cpu.BufferDescriptor{desc.Binding0(), desc.Binding1()}\n\t\t}\n\t\t{\n\t\t\tdesc := new(piet.BinningDescriptorSetLayout)\n\t\t\tg.programs.binning.descriptors = unsafe.Pointer(desc)\n\t\t\tg.programs.binning.buffers = []*cpu.BufferDescriptor{desc.Binding0(), desc.Binding1()}\n\t\t}\n\t\t{\n\t\t\tdesc := new(piet.CoarseDescriptorSetLayout)\n\t\t\tg.programs.coarse.descriptors = unsafe.Pointer(desc)\n\t\t\tg.programs.coarse.buffers = []*cpu.BufferDescriptor{desc.Binding0(), desc.Binding1()}\n\t\t}\n\t\t{\n\t\t\tdesc := new(piet.Kernel4DescriptorSetLayout)\n\t\t\tg.programs.kernel4.descriptors = unsafe.Pointer(desc)\n\t\t\tg.programs.kernel4.buffers = []*cpu.BufferDescriptor{desc.Binding0(), desc.Binding1()}\n\t\t\tg.output.descriptors = desc\n\t\t}\n\t}\n\treturn g, nil\n}\n\nfunc newShaders(ctx driver.Device, vsrc, fsrc shader.Sources) (vert driver.VertexShader, frag driver.FragmentShader, err error) {\n\tvert, err = ctx.NewVertexShader(vsrc)\n\tif err != nil {\n\t\treturn\n\t}\n\tfrag, err = ctx.NewFragmentShader(fsrc)\n\tif err != nil {\n\t\tvert.Release()\n\t}\n\treturn\n}\n\nfunc (g *compute) Frame(frameOps *op.Ops, target RenderTarget, viewport image.Point) error {\n\tg.frameCount++\n\tg.collect(viewport, frameOps)\n\treturn g.frame(target)\n}\n\nfunc (g *compute) collect(viewport image.Point, ops *op.Ops) {\n\tg.viewport = viewport\n\tg.collector.reset()\n\n\tg.texOps = g.texOps[:0]\n\tg.collector.collect(ops, viewport, &g.texOps)\n}\n\nfunc (g *compute) Clear(col color.NRGBA) {\n\tg.collector.clear = true\n\tg.collector.clearColor = f32color.LinearFromSRGB(col)\n}\n\nfunc (g *compute) frame(target RenderTarget) error {\n\tviewport := g.viewport\n\tdefFBO := g.ctx.BeginFrame(target, g.collector.clear, viewport)\n\tdefer g.ctx.EndFrame()\n\n\tt := &g.timers\n\tif g.collector.profile && t.t == nil && g.ctx.Caps().Features.Has(driver.FeatureTimers) {\n\t\tt.t = newTimers(g.ctx)\n\t\tt.compact = t.t.newTimer()\n\t\tt.render = t.t.newTimer()\n\t\tt.blit = t.t.newTimer()\n\t}\n\n\tif err := g.uploadImages(); err != nil {\n\t\treturn err\n\t}\n\tif err := g.renderMaterials(); err != nil {\n\t\treturn err\n\t}\n\tg.layer(viewport, g.texOps)\n\tt.render.begin()\n\tif err := g.renderLayers(viewport); err != nil {\n\t\treturn err\n\t}\n\tt.render.end()\n\td := driver.LoadDesc{\n\t\tClearColor: g.collector.clearColor,\n\t}\n\tif g.collector.clear {\n\t\tg.collector.clear = false\n\t\td.Action = driver.LoadActionClear\n\t}\n\tt.blit.begin()\n\tg.blitLayers(d, defFBO, viewport)\n\tt.blit.end()\n\tt.compact.begin()\n\tif err := g.compactAllocs(); err != nil {\n\t\treturn err\n\t}\n\tt.compact.end()\n\tif g.collector.profile && t.t.ready() {\n\t\tcom, ren, blit := t.compact.Elapsed, t.render.Elapsed, t.blit.Elapsed\n\t\tft := com + ren + blit\n\t\tq := 100 * time.Microsecond\n\t\tft = ft.Round(q)\n\t\tcom, ren, blit = com.Round(q), ren.Round(q), blit.Round(q)\n\t\tt.profile = fmt.Sprintf(\"ft:%7s com: %7s ren:%7s blit:%7s\", ft, com, ren, blit)\n\t}\n\treturn nil\n}\n\nfunc (g *compute) dumpAtlases() {\n\tfor i, a := range g.atlases {\n\t\tdump := image.NewRGBA(image.Rectangle{Max: a.size})\n\t\terr := driver.DownloadImage(g.ctx, a.image, dump)\n\t\tif err != nil {\n\t\t\tpanic(err)\n\t\t}\n\t\tnrgba := image.NewNRGBA(dump.Bounds())\n\t\tdraw.Draw(nrgba, image.Rectangle{}, dump, image.Point{}, draw.Src)\n\t\tvar buf bytes.Buffer\n\t\tif err := png.Encode(&buf, nrgba); err != nil {\n\t\t\tpanic(err)\n\t\t}\n\t\tif err := ioutil.WriteFile(fmt.Sprintf(\"dump-%d.png\", i), buf.Bytes(), 0600); err != nil {\n\t\t\tpanic(err)\n\t\t}\n\t}\n}\n\nfunc (g *compute) Profile() string {\n\treturn g.timers.profile\n}\n\nfunc (g *compute) compactAllocs() error {\n\tconst (\n\t\tmaxAllocAge = 3\n\t\tmaxAtlasAge = 10\n\t)\n\tatlases := g.atlases\n\tfor _, a := range atlases {\n\t\tif len(a.allocs) > 0 && g.frameCount-a.lastFrame > maxAtlasAge {\n\t\t\ta.compact = true\n\t\t}\n\t}\n\tfor len(atlases) > 0 {\n\t\tvar (\n\t\t\tdstAtlas *textureAtlas\n\t\t\tformat driver.TextureFormat\n\t\t\tbindings driver.BufferBinding\n\t\t)\n\t\tg.moves = g.moves[:0]\n\t\taddedLayers := false\n\t\tuseCPU := false\n\tfill:\n\t\tfor len(atlases) > 0 {\n\t\t\tsrcAtlas := atlases[0]\n\t\t\tallocs := srcAtlas.allocs\n\t\t\tif !srcAtlas.compact {\n\t\t\t\tatlases = atlases[1:]\n\t\t\t\tcontinue\n\t\t\t}\n\t\t\tif addedLayers && (format != srcAtlas.format || srcAtlas.bindings&bindings != srcAtlas.bindings) {\n\t\t\t\tbreak\n\t\t\t}\n\t\t\tformat = srcAtlas.format\n\t\t\tbindings = srcAtlas.bindings\n\t\t\tfor len(srcAtlas.allocs) > 0 {\n\t\t\t\ta := srcAtlas.allocs[0]\n\t\t\t\tn := len(srcAtlas.allocs)\n\t\t\t\tif g.frameCount-a.frameCount > maxAllocAge {\n\t\t\t\t\ta.dead = true\n\t\t\t\t\tsrcAtlas.allocs[0] = srcAtlas.allocs[n-1]\n\t\t\t\t\tsrcAtlas.allocs = srcAtlas.allocs[:n-1]\n\t\t\t\t\tcontinue\n\t\t\t\t}\n\t\t\t\tsize := a.rect.Size()\n\t\t\t\talloc, fits := g.atlasAlloc(allocQuery{\n\t\t\t\t\tatlas: dstAtlas,\n\t\t\t\t\tsize: size,\n\t\t\t\t\tformat: format,\n\t\t\t\t\tbindings: bindings,\n\t\t\t\t\tnocompact: true,\n\t\t\t\t})\n\t\t\t\tif !fits {\n\t\t\t\t\tbreak fill\n\t\t\t\t}\n\t\t\t\tdstAtlas = alloc.atlas\n\t\t\t\tallocs = append(allocs, a)\n\t\t\t\taddedLayers = true\n\t\t\t\tuseCPU = useCPU || a.cpu\n\t\t\t\tdstAtlas.allocs = append(dstAtlas.allocs, a)\n\t\t\t\tpos := alloc.rect.Min\n\t\t\t\tg.moves = append(g.moves, atlasMove{\n\t\t\t\t\tsrc: srcAtlas, dstPos: pos, srcRect: a.rect, cpu: a.cpu,\n\t\t\t\t})\n\t\t\t\ta.atlas = dstAtlas\n\t\t\t\ta.rect = image.Rectangle{Min: pos, Max: pos.Add(a.rect.Size())}\n\t\t\t\tsrcAtlas.allocs[0] = srcAtlas.allocs[n-1]\n\t\t\t\tsrcAtlas.allocs = srcAtlas.allocs[:n-1]\n\t\t\t}\n\t\t\tsrcAtlas.compact = false\n\t\t\tsrcAtlas.realized = false\n\t\t\tsrcAtlas.packer.clear()\n\t\t\tsrcAtlas.packer.newPage()\n\t\t\tsrcAtlas.packer.maxDims = image.Pt(g.maxTextureDim, g.maxTextureDim)\n\t\t\tatlases = atlases[1:]\n\t\t}\n\t\tif !addedLayers {\n\t\t\tbreak\n\t\t}\n\t\toutputSize := dstAtlas.packer.sizes[0]\n\t\tif err := g.realizeAtlas(dstAtlas, useCPU, outputSize); err != nil {\n\t\t\treturn err\n\t\t}\n\t\tfor _, move := range g.moves {\n\t\t\tif !move.cpu {\n\t\t\t\tg.ctx.CopyTexture(dstAtlas.image, move.dstPos, move.src.image, move.srcRect)\n\t\t\t} else {\n\t\t\t\tsrc := move.src.cpuImage.Data()\n\t\t\t\tdst := dstAtlas.cpuImage.Data()\n\t\t\t\tsstride := move.src.size.X * 4\n\t\t\t\tdstride := dstAtlas.size.X * 4\n\t\t\t\tcopyImage(dst, dstride, move.dstPos, src, sstride, move.srcRect)\n\t\t\t}\n\t\t}\n\t}\n\tfor i := len(g.atlases) - 1; i >= 0; i-- {\n\t\ta := g.atlases[i]\n\t\tif len(a.allocs) == 0 && g.frameCount-a.lastFrame > maxAtlasAge {\n\t\t\ta.Release()\n\t\t\tn := len(g.atlases)\n\t\t\tg.atlases[i] = g.atlases[n-1]\n\t\t\tg.atlases = g.atlases[:n-1]\n\t\t}\n\t}\n\treturn nil\n}\n\nfunc copyImage(dst []byte, dstStride int, dstPos image.Point, src []byte, srcStride int, srcRect image.Rectangle) {\n\tsz := srcRect.Size()\n\tsoff := srcRect.Min.Y*srcStride + srcRect.Min.X*4\n\tdoff := dstPos.Y*dstStride + dstPos.X*4\n\trowLen := sz.X * 4\n\tfor y := 0; y < sz.Y; y++ {\n\t\tsrow := src[soff : soff+rowLen]\n\t\tdrow := dst[doff : doff+rowLen]\n\t\tcopy(drow, srow)\n\t\tsoff += srcStride\n\t\tdoff += dstStride\n\t}\n}\n\nfunc (g *compute) renderLayers(viewport image.Point) error {\n\tlayers := g.collector.frame.layers\n\tfor len(layers) > 0 {\n\t\tvar materials, dst *textureAtlas\n\t\taddedLayers := false\n\t\tg.enc.reset()\n\t\tfor len(layers) > 0 {\n\t\t\tl := &layers[0]\n\t\t\tif l.alloc != nil {\n\t\t\t\tlayers = layers[1:]\n\t\t\t\tcontinue\n\t\t\t}\n\t\t\tif materials != nil {\n\t\t\t\tif l.materials != nil && materials != l.materials {\n\t\t\t\t\t// Only one materials texture per compute pass.\n\t\t\t\t\tbreak\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tmaterials = l.materials\n\t\t\t}\n\t\t\tsize := l.rect.Size()\n\t\t\talloc, fits := g.atlasAlloc(allocQuery{\n\t\t\t\tatlas: dst,\n\t\t\t\tempty: true,\n\t\t\t\tformat: driver.TextureFormatRGBA8,\n\t\t\t\tbindings: combinedBindings,\n\t\t\t\t// Pad to avoid overlap.\n\t\t\t\tsize: size.Add(image.Pt(1, 1)),\n\t\t\t})\n\t\t\tif !fits {\n\t\t\t\t// Only one output atlas per compute pass.\n\t\t\t\tbreak\n\t\t\t}\n\t\t\tdst = alloc.atlas\n\t\t\tdst.compact = true\n\t\t\taddedLayers = true\n\t\t\tl.alloc = &alloc\n\t\t\tdst.allocs = append(dst.allocs, l.alloc)\n\t\t\tencodeLayer(*l, alloc.rect.Min, viewport, &g.enc, g.texOps)\n\t\t\tlayers = layers[1:]\n\t\t}\n\t\tif !addedLayers {\n\t\t\tbreak\n\t\t}\n\t\toutputSize := dst.packer.sizes[0]\n\t\ttileDims := image.Point{\n\t\t\tX: (outputSize.X + tileWidthPx - 1) / tileWidthPx,\n\t\t\tY: (outputSize.Y + tileHeightPx - 1) / tileHeightPx,\n\t\t}\n\t\tw, h := tileDims.X*tileWidthPx, tileDims.Y*tileHeightPx\n\t\tif err := g.realizeAtlas(dst, g.useCPU, image.Pt(w, h)); err != nil {\n\t\t\treturn err\n\t\t}\n\t\tif err := g.render(materials, dst.image, dst.cpuImage, tileDims, dst.size.X*4); err != nil {\n\t\t\treturn err\n\t\t}\n\t}\n\treturn nil\n}\n\nfunc (g *compute) blitLayers(d driver.LoadDesc, fbo driver.Texture, viewport image.Point) {\n\tlayers := g.collector.frame.layers\n\tg.output.layerVertices = g.output.layerVertices[:0]\n\tfor _, l := range layers {\n\t\tplacef := layout.FPt(l.alloc.rect.Min)\n\t\tsizef := layout.FPt(l.rect.Size())\n\t\tr := layout.FRect(l.rect)\n\t\tquad := [4]layerVertex{\n\t\t\t{posX: float32(r.Min.X), posY: float32(r.Min.Y), u: placef.X, v: placef.Y},\n\t\t\t{posX: float32(r.Max.X), posY: float32(r.Min.Y), u: placef.X + sizef.X, v: placef.Y},\n\t\t\t{posX: float32(r.Max.X), posY: float32(r.Max.Y), u: placef.X + sizef.X, v: placef.Y + sizef.Y},\n\t\t\t{posX: float32(r.Min.X), posY: float32(r.Max.Y), u: placef.X, v: placef.Y + sizef.Y},\n\t\t}\n\t\tg.output.layerVertices = append(g.output.layerVertices, quad[0], quad[1], quad[3], quad[3], quad[2], quad[1])\n\t\tg.ctx.PrepareTexture(l.alloc.atlas.image)\n\t}\n\tif len(g.output.layerVertices) > 0 {\n\t\tvertexData := byteslice.Slice(g.output.layerVertices)\n\t\tg.output.buffer.ensureCapacity(false, g.ctx, driver.BufferBindingVertices, len(vertexData))\n\t\tg.output.buffer.buffer.Upload(vertexData)\n\t}\n\tg.ctx.BeginRenderPass(fbo, d)\n\tdefer g.ctx.EndRenderPass()\n\tif len(layers) == 0 {\n\t\treturn\n\t}\n\tg.ctx.Viewport(0, 0, viewport.X, viewport.Y)\n\tg.ctx.BindPipeline(g.output.blitPipeline)\n\tg.ctx.BindVertexBuffer(g.output.buffer.buffer, 0)\n\tstart := 0\n\tfor len(layers) > 0 {\n\t\tcount := 0\n\t\tatlas := layers[0].alloc.atlas\n\t\tfor len(layers) > 0 {\n\t\t\tl := layers[0]\n\t\t\tif l.alloc.atlas != atlas {\n\t\t\t\tbreak\n\t\t\t}\n\t\t\tlayers = layers[1:]\n\t\t\tconst verticesPerQuad = 6\n\t\t\tcount += verticesPerQuad\n\t\t}\n\n\t\t// Transform positions to clip space: [-1, -1] - [1, 1], and texture\n\t\t// coordinates to texture space: [0, 0] - [1, 1].\n\t\tclip := f32.Affine2D{}.Scale(f32.Pt(0, 0), f32.Pt(2/float32(viewport.X), 2/float32(viewport.Y))).Offset(f32.Pt(-1, -1))\n\t\tsx, _, ox, _, sy, oy := clip.Elems()\n\t\tg.output.uniforms.scale = [2]float32{sx, sy}\n\t\tg.output.uniforms.pos = [2]float32{ox, oy}\n\t\tg.output.uniforms.uvScale = [2]float32{1 / float32(atlas.size.X), 1 / float32(atlas.size.Y)}\n\t\tg.output.uniBuf.Upload(byteslice.Struct(g.output.uniforms))\n\t\tg.ctx.BindUniforms(g.output.uniBuf)\n\t\tg.ctx.BindTexture(0, atlas.image)\n\t\tg.ctx.DrawArrays(start, count)\n\t\tstart += count\n\t}\n}\n\nfunc (g *compute) renderMaterials() error {\n\tm := &g.materials\n\tfor k, place := range m.allocs {\n\t\tif place.alloc.dead {\n\t\t\tdelete(m.allocs, k)\n\t\t}\n\t}\n\ttexOps := g.texOps\n\tfor len(texOps) > 0 {\n\t\tm.quads = m.quads[:0]\n\t\tvar (\n\t\t\tatlas *textureAtlas\n\t\t\timgAtlas *textureAtlas\n\t\t)\n\t\t// A material is clipped to avoid drawing outside its atlas bounds.\n\t\t// However, imprecision in the clipping may cause a single pixel\n\t\t// overflow.\n\t\tvar padding = image.Pt(1, 1)\n\t\tvar allocStart int\n\t\tfor len(texOps) > 0 {\n\t\t\top := &texOps[0]\n\t\t\tif a, exists := m.allocs[op.key]; exists {\n\t\t\t\tg.touchAlloc(a.alloc)\n\t\t\t\top.matAlloc = a\n\t\t\t\ttexOps = texOps[1:]\n\t\t\t\tcontinue\n\t\t\t}\n\n\t\t\tif imgAtlas != nil && op.imgAlloc.atlas != imgAtlas {\n\t\t\t\t// Only one image atlas per render pass.\n\t\t\t\tbreak\n\t\t\t}\n\t\t\timgAtlas = op.imgAlloc.atlas\n\t\t\tquad := g.materialQuad(imgAtlas.size, op.key.transform, op.img, op.imgAlloc.rect.Min)\n\t\t\tboundsf := quadBounds(quad)\n\t\t\tbounds := boundRectF(boundsf)\n\t\t\tbounds = bounds.Intersect(op.key.bounds)\n\n\t\t\tsize := bounds.Size()\n\t\t\talloc, fits := g.atlasAlloc(allocQuery{\n\t\t\t\tatlas: atlas,\n\t\t\t\tsize: size.Add(padding),\n\t\t\t\tformat: driver.TextureFormatRGBA8,\n\t\t\t\tbindings: combinedBindings,\n\t\t\t})\n\t\t\tif !fits {\n\t\t\t\tbreak\n\t\t\t}\n\t\t\tif atlas == nil {\n\t\t\t\tallocStart = len(alloc.atlas.allocs)\n\t\t\t}\n\t\t\tatlas = alloc.atlas\n\t\t\talloc.cpu = g.useCPU\n\t\t\toffsetf := layout.FPt(bounds.Min.Mul(-1))\n\t\t\tscale := f32.Pt(float32(size.X), float32(size.Y))\n\t\t\tfor i := range quad {\n\t\t\t\t// Position quad to match place.\n\t\t\t\tquad[i].posX += offsetf.X\n\t\t\t\tquad[i].posY += offsetf.Y\n\t\t\t\t// Scale to match viewport [0, 1].\n\t\t\t\tquad[i].posX /= scale.X\n\t\t\t\tquad[i].posY /= scale.Y\n\t\t\t}\n\t\t\t// Draw quad as two triangles.\n\t\t\tm.quads = append(m.quads, quad[0], quad[1], quad[3], quad[3], quad[1], quad[2])\n\t\t\tif m.allocs == nil {\n\t\t\t\tm.allocs = make(map[textureKey]materialAlloc)\n\t\t\t}\n\t\t\tatlasAlloc := materialAlloc{\n\t\t\t\talloc: &alloc,\n\t\t\t\toffset: bounds.Min.Mul(-1),\n\t\t\t}\n\t\t\tatlas.allocs = append(atlas.allocs, atlasAlloc.alloc)\n\t\t\tm.allocs[op.key] = atlasAlloc\n\t\t\top.matAlloc = atlasAlloc\n\t\t\ttexOps = texOps[1:]\n\t\t}\n\t\tif len(m.quads) == 0 {\n\t\t\tbreak\n\t\t}\n\t\trealized := atlas.realized\n\t\tif err := g.realizeAtlas(atlas, g.useCPU, atlas.packer.sizes[0]); err != nil {\n\t\t\treturn err\n\t\t}\n\t\t// Transform to clip space: [-1, -1] - [1, 1].\n\t\t*m.uniforms.u = materialUniforms{\n\t\t\tscale: [2]float32{2, 2},\n\t\t\tpos: [2]float32{-1, -1},\n\t\t}\n\t\tif !g.srgb {\n\t\t\tm.uniforms.u.emulatesRGB = 1.0\n\t\t}\n\t\tm.uniforms.buf.Upload(byteslice.Struct(m.uniforms.u))\n\t\tvertexData := byteslice.Slice(m.quads)\n\t\tn := pow2Ceil(len(vertexData))\n\t\tm.buffer.ensureCapacity(false, g.ctx, driver.BufferBindingVertices, n)\n\t\tm.buffer.buffer.Upload(vertexData)\n\t\tvar d driver.LoadDesc\n\t\tif !realized {\n\t\t\td.Action = driver.LoadActionClear\n\t\t}\n\t\tg.ctx.PrepareTexture(imgAtlas.image)\n\t\tg.ctx.BeginRenderPass(atlas.image, d)\n\t\tg.ctx.BindTexture(0, imgAtlas.image)\n\t\tg.ctx.BindPipeline(m.pipeline)\n\t\tg.ctx.BindUniforms(m.uniforms.buf)\n\t\tg.ctx.BindVertexBuffer(m.buffer.buffer, 0)\n\t\tnewAllocs := atlas.allocs[allocStart:]\n\t\tfor i, a := range newAllocs {\n\t\t\tsz := a.rect.Size().Sub(padding)\n\t\t\tg.ctx.Viewport(a.rect.Min.X, a.rect.Min.Y, sz.X, sz.Y)\n\t\t\tg.ctx.DrawArrays(i*6, 6)\n\t\t}\n\t\tg.ctx.EndRenderPass()\n\t\tif !g.useCPU {\n\t\t\tcontinue\n\t\t}\n\t\tsrc := atlas.image\n\t\tdata := atlas.cpuImage.Data()\n\t\tfor _, a := range newAllocs {\n\t\t\tstride := atlas.size.X * 4\n\t\t\tcol := a.rect.Min.X * 4\n\t\t\trow := stride * a.rect.Min.Y\n\t\t\toff := col + row\n\t\t\tsrc.ReadPixels(a.rect, data[off:], stride)\n\t\t}\n\t}\n\treturn nil\n}\n\nfunc (g *compute) uploadImages() error {\n\tfor k, a := range g.imgAllocs {\n\t\tif a.dead {\n\t\t\tdelete(g.imgAllocs, k)\n\t\t}\n\t}\n\ttype upload struct {\n\t\tpos image.Point\n\t\timg *image.RGBA\n\t}\n\tvar uploads []upload\n\tformat := driver.TextureFormatSRGBA\n\tif !g.srgb {\n\t\tformat = driver.TextureFormatRGBA8\n\t}\n\t// padding is the number of pixels added to the right and below\n\t// images, to avoid atlas filtering artifacts.\n\tconst padding = 1\n\ttexOps := g.texOps\n\tfor len(texOps) > 0 {\n\t\tuploads = uploads[:0]\n\t\tvar atlas *textureAtlas\n\t\tfor len(texOps) > 0 {\n\t\t\top := &texOps[0]\n\t\t\tif a, exists := g.imgAllocs[op.img.handle]; exists {\n\t\t\t\tg.touchAlloc(a)\n\t\t\t\top.imgAlloc = a\n\t\t\t\ttexOps = texOps[1:]\n\t\t\t\tcontinue\n\t\t\t}\n\t\t\tsize := op.img.src.Bounds().Size().Add(image.Pt(padding, padding))\n\t\t\talloc, fits := g.atlasAlloc(allocQuery{\n\t\t\t\tatlas: atlas,\n\t\t\t\tsize: size,\n\t\t\t\tformat: format,\n\t\t\t\tbindings: driver.BufferBindingTexture | driver.BufferBindingFramebuffer,\n\t\t\t})\n\t\t\tif !fits {\n\t\t\t\tbreak\n\t\t\t}\n\t\t\tatlas = alloc.atlas\n\t\t\tif g.imgAllocs == nil {\n\t\t\t\tg.imgAllocs = make(map[interface{}]*atlasAlloc)\n\t\t\t}\n\t\t\top.imgAlloc = &alloc\n\t\t\tatlas.allocs = append(atlas.allocs, op.imgAlloc)\n\t\t\tg.imgAllocs[op.img.handle] = op.imgAlloc\n\t\t\tuploads = append(uploads, upload{pos: alloc.rect.Min, img: op.img.src})\n\t\t\ttexOps = texOps[1:]\n\t\t}\n\t\tif len(uploads) == 0 {\n\t\t\tbreak\n\t\t}\n\t\tif err := g.realizeAtlas(atlas, false, atlas.packer.sizes[0]); err != nil {\n\t\t\treturn err\n\t\t}\n\t\tfor _, u := range uploads {\n\t\t\tsize := u.img.Bounds().Size()\n\t\t\tdriver.UploadImage(atlas.image, u.pos, u.img)\n\t\t\trightPadding := image.Pt(padding, size.Y)\n\t\t\tatlas.image.Upload(image.Pt(u.pos.X+size.X, u.pos.Y), rightPadding, g.zeros(rightPadding.X*rightPadding.Y*4), 0)\n\t\t\tbottomPadding := image.Pt(size.X, padding)\n\t\t\tatlas.image.Upload(image.Pt(u.pos.X, u.pos.Y+size.Y), bottomPadding, g.zeros(bottomPadding.X*bottomPadding.Y*4), 0)\n\t\t}\n\t}\n\treturn nil\n}\n\nfunc pow2Ceil(v int) int {\n\texp := bits.Len(uint(v))\n\tif bits.OnesCount(uint(v)) == 1 {\n\t\texp--\n\t}\n\treturn 1 << exp\n}\n\n// materialQuad constructs a quad that represents the transformed image. It returns the quad\n// and its bounds.\nfunc (g *compute) materialQuad(imgAtlasSize image.Point, M f32.Affine2D, img imageOpData, uvPos image.Point) [4]materialVertex {\n\timgSize := layout.FPt(img.src.Bounds().Size())\n\tsx, hx, ox, hy, sy, oy := M.Elems()\n\ttransOff := f32.Pt(ox, oy)\n\t// The 4 corners of the image rectangle transformed by M, excluding its offset, are:\n\t//\n\t// q0: M * (0, 0) q3: M * (w, 0)\n\t// q1: M * (0, h) q2: M * (w, h)\n\t//\n\t// Note that q0 = M*0 = 0, q2 = q1 + q3.\n\tq0 := f32.Pt(0, 0)\n\tq1 := f32.Pt(hx*imgSize.Y, sy*imgSize.Y)\n\tq3 := f32.Pt(sx*imgSize.X, hy*imgSize.X)\n\tq2 := q1.Add(q3)\n\tq0 = q0.Add(transOff)\n\tq1 = q1.Add(transOff)\n\tq2 = q2.Add(transOff)\n\tq3 = q3.Add(transOff)\n\n\tuvPosf := layout.FPt(uvPos)\n\tatlasScale := f32.Pt(1/float32(imgAtlasSize.X), 1/float32(imgAtlasSize.Y))\n\tuvBounds := f32.Rectangle{\n\t\tMin: uvPosf,\n\t\tMax: uvPosf.Add(imgSize),\n\t}\n\tuvBounds.Min.X *= atlasScale.X\n\tuvBounds.Min.Y *= atlasScale.Y\n\tuvBounds.Max.X *= atlasScale.X\n\tuvBounds.Max.Y *= atlasScale.Y\n\tquad := [4]materialVertex{\n\t\t{posX: q0.X, posY: q0.Y, u: uvBounds.Min.X, v: uvBounds.Min.Y},\n\t\t{posX: q1.X, posY: q1.Y, u: uvBounds.Min.X, v: uvBounds.Max.Y},\n\t\t{posX: q2.X, posY: q2.Y, u: uvBounds.Max.X, v: uvBounds.Max.Y},\n\t\t{posX: q3.X, posY: q3.Y, u: uvBounds.Max.X, v: uvBounds.Min.Y},\n\t}\n\treturn quad\n}\n\nfunc quadBounds(q [4]materialVertex) f32.Rectangle {\n\tq0 := f32.Pt(q[0].posX, q[0].posY)\n\tq1 := f32.Pt(q[1].posX, q[1].posY)\n\tq2 := f32.Pt(q[2].posX, q[2].posY)\n\tq3 := f32.Pt(q[3].posX, q[3].posY)\n\treturn f32.Rectangle{\n\t\tMin: min(min(q0, q1), min(q2, q3)),\n\t\tMax: max(max(q0, q1), max(q2, q3)),\n\t}\n}\n\nfunc max(p1, p2 f32.Point) f32.Point {\n\tp := p1\n\tif p2.X > p.X {\n\t\tp.X = p2.X\n\t}\n\tif p2.Y > p.Y {\n\t\tp.Y = p2.Y\n\t}\n\treturn p\n}\n\nfunc min(p1, p2 f32.Point) f32.Point {\n\tp := p1\n\tif p2.X < p.X {\n\t\tp.X = p2.X\n\t}\n\tif p2.Y < p.Y {\n\t\tp.Y = p2.Y\n\t}\n\treturn p\n}\n\nfunc (enc *encoder) encodePath(verts []byte, fillMode int) {\n\tfor ; len(verts) >= scene.CommandSize+4; verts = verts[scene.CommandSize+4:] {\n\t\tcmd := ops.DecodeCommand(verts[4:])\n\t\tif cmd.Op() == scene.OpGap {\n\t\t\tif fillMode != scene.FillModeNonzero {\n\t\t\t\t// Skip gaps in strokes.\n\t\t\t\tcontinue\n\t\t\t}\n\t\t\t// Replace them by a straight line in outlines.\n\t\t\tcmd = scene.Line(scene.DecodeGap(cmd))\n\t\t}\n\t\tenc.scene = append(enc.scene, cmd)\n\t\tenc.npathseg++\n\t}\n}\n\nfunc (g *compute) render(images *textureAtlas, dst driver.Texture, cpuDst cpu.ImageDescriptor, tileDims image.Point, stride int) error {\n\tconst (\n\t\t// wgSize is the largest and most common workgroup size.\n\t\twgSize = 128\n\t\t// PARTITION_SIZE from elements.comp\n\t\tpartitionSize = 32 * 4\n\t)\n\twidthInBins := (tileDims.X + 15) / 16\n\theightInBins := (tileDims.Y + 7) / 8\n\tif widthInBins*heightInBins > wgSize {\n\t\treturn fmt.Errorf(\"gpu: output too large (%dx%d)\", tileDims.X*tileWidthPx, tileDims.Y*tileHeightPx)\n\t}\n\n\tenc := &g.enc\n\t// Pad scene with zeroes to avoid reading garbage in elements.comp.\n\tscenePadding := partitionSize - len(enc.scene)%partitionSize\n\tenc.scene = append(enc.scene, make([]scene.Command, scenePadding)...)\n\n\tscene := byteslice.Slice(enc.scene)\n\tif s := len(scene); s > g.buffers.scene.size {\n\t\tpaddedCap := s * 11 / 10\n\t\tif err := g.buffers.scene.ensureCapacity(g.useCPU, g.ctx, driver.BufferBindingShaderStorageRead, paddedCap); err != nil {\n\t\t\treturn err\n\t\t}\n\t}\n\tg.buffers.scene.upload(scene)\n\n\t// alloc is the number of allocated bytes for static buffers.\n\tvar alloc uint32\n\tround := func(v, quantum int) int {\n\t\treturn (v + quantum - 1) &^ (quantum - 1)\n\t}\n\tmalloc := func(size int) memAlloc {\n\t\tsize = round(size, 4)\n\t\toffset := alloc\n\t\talloc += uint32(size)\n\t\treturn memAlloc{offset /*, uint32(size)*/}\n\t}\n\n\t*g.conf = config{\n\t\tn_elements: uint32(enc.npath),\n\t\tn_pathseg: uint32(enc.npathseg),\n\t\twidth_in_tiles: uint32(tileDims.X),\n\t\theight_in_tiles: uint32(tileDims.Y),\n\t\ttile_alloc: malloc(enc.npath * pathSize),\n\t\tbin_alloc: malloc(round(enc.npath, wgSize) * binSize),\n\t\tptcl_alloc: malloc(tileDims.X * tileDims.Y * ptclInitialAlloc),\n\t\tpathseg_alloc: malloc(enc.npathseg * pathsegSize),\n\t\tanno_alloc: malloc(enc.npath * annoSize),\n\t\ttrans_alloc: malloc(enc.ntrans * transSize),\n\t}\n\n\tnumPartitions := (enc.numElements() + 127) / 128\n\t// clearSize is the atomic partition counter plus flag and 2 states per partition.\n\tclearSize := 4 + numPartitions*stateStride\n\tif clearSize > g.buffers.state.size {\n\t\tpaddedCap := clearSize * 11 / 10\n\t\tif err := g.buffers.state.ensureCapacity(g.useCPU, g.ctx, driver.BufferBindingShaderStorageRead|driver.BufferBindingShaderStorageWrite, paddedCap); err != nil {\n\t\t\treturn err\n\t\t}\n\t}\n\n\tconfData := byteslice.Struct(g.conf)\n\tg.buffers.config.ensureCapacity(g.useCPU, g.ctx, driver.BufferBindingShaderStorageRead, len(confData))\n\tg.buffers.config.upload(confData)\n\n\tminSize := int(unsafe.Sizeof(memoryHeader{})) + int(alloc)\n\tif minSize > g.buffers.memory.size {\n\t\t// Add space for dynamic GPU allocations.\n\t\tconst sizeBump = 4 * 1024 * 1024\n\t\tminSize += sizeBump\n\t\tif err := g.buffers.memory.ensureCapacity(g.useCPU, g.ctx, driver.BufferBindingShaderStorageRead|driver.BufferBindingShaderStorageWrite, minSize); err != nil {\n\t\t\treturn err\n\t\t}\n\t}\n\n\tfor {\n\t\t*g.memHeader = memoryHeader{\n\t\t\tmem_offset: alloc,\n\t\t}\n\t\tg.buffers.memory.upload(byteslice.Struct(g.memHeader))\n\t\tg.buffers.state.upload(g.zeros(clearSize))\n\n\t\tif !g.useCPU {\n\t\t\tg.ctx.BeginCompute()\n\t\t\tg.ctx.BindImageTexture(kernel4OutputUnit, dst)\n\t\t\timg := g.output.nullMaterials\n\t\t\tif images != nil {\n\t\t\t\timg = images.image\n\t\t\t}\n\t\t\tg.ctx.BindImageTexture(kernel4AtlasUnit, img)\n\t\t} else {\n\t\t\t*g.output.descriptors.Binding2() = cpuDst\n\t\t\tif images != nil {\n\t\t\t\t*g.output.descriptors.Binding3() = images.cpuImage\n\t\t\t}\n\t\t}\n\n\t\tg.bindBuffers()\n\t\tg.memoryBarrier()\n\t\tg.dispatch(g.programs.elements, numPartitions, 1, 1)\n\t\tg.memoryBarrier()\n\t\tg.dispatch(g.programs.tileAlloc, (enc.npath+wgSize-1)/wgSize, 1, 1)\n\t\tg.memoryBarrier()\n\t\tg.dispatch(g.programs.pathCoarse, (enc.npathseg+31)/32, 1, 1)\n\t\tg.memoryBarrier()\n\t\tg.dispatch(g.programs.backdrop, (enc.npath+wgSize-1)/wgSize, 1, 1)\n\t\t// No barrier needed between backdrop and binning.\n\t\tg.dispatch(g.programs.binning, (enc.npath+wgSize-1)/wgSize, 1, 1)\n\t\tg.memoryBarrier()\n\t\tg.dispatch(g.programs.coarse, widthInBins, heightInBins, 1)\n\t\tg.memoryBarrier()\n\t\tg.dispatch(g.programs.kernel4, tileDims.X, tileDims.Y, 1)\n\t\tg.memoryBarrier()\n\t\tif !g.useCPU {\n\t\t\tg.ctx.EndCompute()\n\t\t} else {\n\t\t\tg.dispatcher.Sync()\n\t\t}\n\n\t\tif err := g.buffers.memory.download(byteslice.Struct(g.memHeader)); err != nil {\n\t\t\tif err == driver.ErrContentLost {\n\t\t\t\tcontinue\n\t\t\t}\n\t\t\treturn err\n\t\t}\n\t\tswitch errCode := g.memHeader.mem_error; errCode {\n\t\tcase memNoError:\n\t\t\tif g.useCPU {\n\t\t\t\tw, h := tileDims.X*tileWidthPx, tileDims.Y*tileHeightPx\n\t\t\t\tdst.Upload(image.Pt(0, 0), image.Pt(w, h), cpuDst.Data(), stride)\n\t\t\t}\n\t\t\treturn nil\n\t\tcase memMallocFailed:\n\t\t\t// Resize memory and try again.\n\t\t\tsz := g.buffers.memory.size * 15 / 10\n\t\t\tif err := g.buffers.memory.ensureCapacity(g.useCPU, g.ctx, driver.BufferBindingShaderStorageRead|driver.BufferBindingShaderStorageWrite, sz); err != nil {\n\t\t\t\treturn err\n\t\t\t}\n\t\t\tcontinue\n\t\tdefault:\n\t\t\treturn fmt.Errorf(\"compute: shader program failed with error %d\", errCode)\n\t\t}\n\t}\n}\n\nfunc (g *compute) memoryBarrier() {\n\tif g.useCPU {\n\t\tg.dispatcher.Barrier()\n\t}\n}\n\nfunc (g *compute) dispatch(p computeProgram, x, y, z int) {\n\tif !g.useCPU {\n\t\tg.ctx.BindProgram(p.prog)\n\t\tg.ctx.DispatchCompute(x, y, z)\n\t} else {\n\t\tg.dispatcher.Dispatch(p.progInfo, p.descriptors, x, y, z)\n\t}\n}\n\n// zeros returns a byte slice with size bytes of zeros.\nfunc (g *compute) zeros(size int) []byte {\n\tif cap(g.zeroSlice) < size {\n\t\tg.zeroSlice = append(g.zeroSlice, make([]byte, size)...)\n\t}\n\treturn g.zeroSlice[:size]\n}\n\nfunc (g *compute) touchAlloc(a *atlasAlloc) {\n\tif a.dead {\n\t\tpanic(\"re-use of dead allocation\")\n\t}\n\ta.frameCount = g.frameCount\n\ta.atlas.lastFrame = a.frameCount\n}\n\nfunc (g *compute) atlasAlloc(q allocQuery) (atlasAlloc, bool) {\n\tvar (\n\t\tplace placement\n\t\tfits bool\n\t\tatlas = q.atlas\n\t)\n\tif atlas != nil {\n\t\tplace, fits = atlas.packer.tryAdd(q.size)\n\t\tif !fits {\n\t\t\tatlas.compact = true\n\t\t}\n\t}\n\tif atlas == nil {\n\t\t// Look for matching atlas to re-use.\n\t\tfor _, a := range g.atlases {\n\t\t\tif q.empty && len(a.allocs) > 0 {\n\t\t\t\tcontinue\n\t\t\t}\n\t\t\tif q.nocompact && a.compact {\n\t\t\t\tcontinue\n\t\t\t}\n\t\t\tif a.format != q.format || a.bindings&q.bindings != q.bindings {\n\t\t\t\tcontinue\n\t\t\t}\n\t\t\tplace, fits = a.packer.tryAdd(q.size)\n\t\t\tif !fits {\n\t\t\t\ta.compact = true\n\t\t\t\tcontinue\n\t\t\t}\n\t\t\tatlas = a\n\t\t\tbreak\n\t\t}\n\t}\n\tif atlas == nil {\n\t\tatlas = &textureAtlas{\n\t\t\tformat: q.format,\n\t\t\tbindings: q.bindings,\n\t\t}\n\t\tatlas.packer.maxDims = image.Pt(g.maxTextureDim, g.maxTextureDim)\n\t\tatlas.packer.newPage()\n\t\tg.atlases = append(g.atlases, atlas)\n\t\tplace, fits = atlas.packer.tryAdd(q.size)\n\t\tif !fits {\n\t\t\tpanic(fmt.Errorf(\"compute: atlas allocation too large (%v)\", q.size))\n\t\t}\n\t}\n\tif !fits {\n\t\treturn atlasAlloc{}, false\n\t}\n\tatlas.lastFrame = g.frameCount\n\treturn atlasAlloc{\n\t\tframeCount: g.frameCount,\n\t\tatlas: atlas,\n\t\trect: image.Rectangle{Min: place.Pos, Max: place.Pos.Add(q.size)},\n\t}, true\n}\n\nfunc (g *compute) realizeAtlas(atlas *textureAtlas, useCPU bool, size image.Point) error {\n\tdefer func() {\n\t\tatlas.packer.maxDims = atlas.size\n\t\tatlas.realized = true\n\t\tatlas.ensureCPUImage(useCPU)\n\t}()\n\tif atlas.size.X >= size.X && atlas.size.Y >= size.Y {\n\t\treturn nil\n\t}\n\tif atlas.realized {\n\t\tpanic(\"resizing a realized atlas\")\n\t}\n\tif err := atlas.resize(g.ctx, size); err != nil {\n\t\treturn err\n\t}\n\treturn nil\n}\n\nfunc (a *textureAtlas) resize(ctx driver.Device, size image.Point) error {\n\ta.Release()\n\n\timg, err := ctx.NewTexture(a.format, size.X, size.Y,\n\t\tdriver.FilterNearest,\n\t\tdriver.FilterNearest,\n\t\ta.bindings)\n\tif err != nil {\n\t\treturn err\n\t}\n\ta.image = img\n\ta.size = size\n\treturn nil\n}\n\nfunc (a *textureAtlas) ensureCPUImage(useCPU bool) {\n\tif !useCPU || a.hasCPU {\n\t\treturn\n\t}\n\ta.hasCPU = true\n\ta.cpuImage = cpu.NewImageRGBA(a.size.X, a.size.Y)\n}\n\nfunc (g *compute) Release() {\n\tif g.useCPU {\n\t\tg.dispatcher.Stop()\n\t}\n\ttype resource interface {\n\t\tRelease()\n\t}\n\tres := []resource{\n\t\tg.output.nullMaterials,\n\t\t&g.programs.elements,\n\t\t&g.programs.tileAlloc,\n\t\t&g.programs.pathCoarse,\n\t\t&g.programs.backdrop,\n\t\t&g.programs.binning,\n\t\t&g.programs.coarse,\n\t\t&g.programs.kernel4,\n\t\tg.output.blitPipeline,\n\t\t&g.output.buffer,\n\t\tg.output.uniBuf,\n\t\t&g.buffers.scene,\n\t\t&g.buffers.state,\n\t\t&g.buffers.memory,\n\t\t&g.buffers.config,\n\t\tg.materials.pipeline,\n\t\t&g.materials.buffer,\n\t\tg.materials.uniforms.buf,\n\t\tg.timers.t,\n\t}\n\tfor _, r := range res {\n\t\tif r != nil {\n\t\t\tr.Release()\n\t\t}\n\t}\n\tfor _, a := range g.atlases {\n\t\ta.Release()\n\t}\n\tg.ctx.Release()\n\t*g = compute{}\n}\n\nfunc (a *textureAtlas) Release() {\n\tif a.image != nil {\n\t\ta.image.Release()\n\t\ta.image = nil\n\t}\n\ta.cpuImage.Free()\n\ta.hasCPU = false\n}\n\nfunc (g *compute) bindBuffers() {\n\tg.bindStorageBuffers(g.programs.elements, g.buffers.memory, g.buffers.config, g.buffers.scene, g.buffers.state)\n\tg.bindStorageBuffers(g.programs.tileAlloc, g.buffers.memory, g.buffers.config)\n\tg.bindStorageBuffers(g.programs.pathCoarse, g.buffers.memory, g.buffers.config)\n\tg.bindStorageBuffers(g.programs.backdrop, g.buffers.memory, g.buffers.config)\n\tg.bindStorageBuffers(g.programs.binning, g.buffers.memory, g.buffers.config)\n\tg.bindStorageBuffers(g.programs.coarse, g.buffers.memory, g.buffers.config)\n\tg.bindStorageBuffers(g.programs.kernel4, g.buffers.memory, g.buffers.config)\n}\n\nfunc (p *computeProgram) Release() {\n\tif p.prog != nil {\n\t\tp.prog.Release()\n\t}\n\t*p = computeProgram{}\n}\n\nfunc (b *sizedBuffer) Release() {\n\tif b.buffer != nil {\n\t\tb.buffer.Release()\n\t}\n\tb.cpuBuf.Free()\n\t*b = sizedBuffer{}\n}\n\nfunc (b *sizedBuffer) ensureCapacity(useCPU bool, ctx driver.Device, binding driver.BufferBinding, size int) error {\n\tif b.size >= size {\n\t\treturn nil\n\t}\n\tif b.buffer != nil {\n\t\tb.Release()\n\t}\n\tb.cpuBuf.Free()\n\tif !useCPU {\n\t\tbuf, err := ctx.NewBuffer(binding, size)\n\t\tif err != nil {\n\t\t\treturn err\n\t\t}\n\t\tb.buffer = buf\n\t} else {\n\t\tb.cpuBuf = cpu.NewBuffer(size)\n\t}\n\tb.size = size\n\treturn nil\n}\n\nfunc (b *sizedBuffer) download(data []byte) error {\n\tif b.buffer != nil {\n\t\treturn b.buffer.Download(data)\n\t} else {\n\t\tcopy(data, b.cpuBuf.Data())\n\t\treturn nil\n\t}\n}\n\nfunc (b *sizedBuffer) upload(data []byte) {\n\tif b.buffer != nil {\n\t\tb.buffer.Upload(data)\n\t} else {\n\t\tcopy(b.cpuBuf.Data(), data)\n\t}\n}\n\nfunc (g *compute) bindStorageBuffers(prog computeProgram, buffers ...sizedBuffer) {\n\tfor i, buf := range buffers {\n\t\tif !g.useCPU {\n\t\t\tg.ctx.BindStorageBuffer(i, buf.buffer)\n\t\t} else {\n\t\t\t*prog.buffers[i] = buf.cpuBuf\n\t\t}\n\t}\n}\n\nvar bo = binary.LittleEndian\n\nfunc (e *encoder) reset() {\n\te.scene = e.scene[:0]\n\te.npath = 0\n\te.npathseg = 0\n\te.ntrans = 0\n}\n\nfunc (e *encoder) numElements() int {\n\treturn len(e.scene)\n}\n\nfunc (e *encoder) append(e2 encoder) {\n\te.scene = append(e.scene, e2.scene...)\n\te.npath += e2.npath\n\te.npathseg += e2.npathseg\n\te.ntrans += e2.ntrans\n}\n\nfunc (e *encoder) transform(m f32.Affine2D) {\n\te.scene = append(e.scene, scene.Transform(m))\n\te.ntrans++\n}\n\nfunc (e *encoder) lineWidth(width float32) {\n\te.scene = append(e.scene, scene.SetLineWidth(width))\n}\n\nfunc (e *encoder) fillMode(mode scene.FillMode) {\n\te.scene = append(e.scene, scene.SetFillMode(mode))\n}\n\nfunc (e *encoder) beginClip(bbox f32.Rectangle) {\n\te.scene = append(e.scene, scene.BeginClip(bbox))\n\te.npath++\n}\n\nfunc (e *encoder) endClip(bbox f32.Rectangle) {\n\te.scene = append(e.scene, scene.EndClip(bbox))\n\te.npath++\n}\n\nfunc (e *encoder) rect(r f32.Rectangle) {\n\t// Rectangle corners, clock-wise.\n\tc0, c1, c2, c3 := r.Min, f32.Pt(r.Min.X, r.Max.Y), r.Max, f32.Pt(r.Max.X, r.Min.Y)\n\te.line(c0, c1)\n\te.line(c1, c2)\n\te.line(c2, c3)\n\te.line(c3, c0)\n}\n\nfunc (e *encoder) fillColor(col color.RGBA) {\n\te.scene = append(e.scene, scene.FillColor(col))\n\te.npath++\n}\n\nfunc (e *encoder) fillImage(index int, offset image.Point) {\n\te.scene = append(e.scene, scene.FillImage(index, offset))\n\te.npath++\n}\n\nfunc (e *encoder) line(start, end f32.Point) {\n\te.scene = append(e.scene, scene.Line(start, end))\n\te.npathseg++\n}\n\nfunc (e *encoder) quad(start, ctrl, end f32.Point) {\n\te.scene = append(e.scene, scene.Quad(start, ctrl, end))\n\te.npathseg++\n}\n\nfunc (c *collector) reset() {\n\tc.prevFrame, c.frame = c.frame, c.prevFrame\n\tc.profile = false\n\tc.clipStates = c.clipStates[:0]\n\tc.transStack = c.transStack[:0]\n\tc.frame.reset()\n}\n\nfunc (c *opsCollector) reset() {\n\tc.paths = c.paths[:0]\n\tc.clipCmds = c.clipCmds[:0]\n\tc.ops = c.ops[:0]\n\tc.layers = c.layers[:0]\n}\n\nfunc (c *collector) addClip(state *encoderState, viewport, bounds f32.Rectangle, path []byte, key ops.Key, hash uint64, strokeWidth float32, push bool) {\n\t// Rectangle clip regions.\n\tif len(path) == 0 && !push {\n\t\t// If the rectangular clip region contains a previous path it can be discarded.\n\t\tp := state.clip\n\t\tt := state.relTrans.Invert()\n\t\tfor p != nil {\n\t\t\t// rect is the parent bounds transformed relative to the rectangle.\n\t\t\trect := transformBounds(t, p.bounds)\n\t\t\tif rect.In(bounds) {\n\t\t\t\treturn\n\t\t\t}\n\t\t\tt = p.relTrans.Invert().Mul(t)\n\t\t\tp = p.parent\n\t\t}\n\t}\n\n\tabsBounds := transformBounds(state.t, bounds).Bounds()\n\tintersect := absBounds\n\tif state.clip != nil {\n\t\tintersect = state.clip.intersect.Intersect(intersect)\n\t}\n\tc.clipStates = append(c.clipStates, clipState{\n\t\tparent: state.clip,\n\t\tabsBounds: absBounds,\n\t\tpath: path,\n\t\tpathKey: key,\n\t\tintersect: intersect,\n\t\tclipKey: clipKey{\n\t\t\tbounds: bounds,\n\t\t\trelTrans: state.relTrans,\n\t\t\tstrokeWidth: strokeWidth,\n\t\t\tpathHash: hash,\n\t\t},\n\t})\n\tstate.clip = &c.clipStates[len(c.clipStates)-1]\n\tstate.relTrans = f32.Affine2D{}\n}\n\nfunc (c *collector) collect(root *op.Ops, viewport image.Point, texOps *[]textureOp) {\n\tfview := f32.Rectangle{Max: layout.FPt(viewport)}\n\tvar intOps *ops.Ops\n\tif root != nil {\n\t\tintOps = &root.Internal\n\t}\n\tc.reader.Reset(intOps)\n\tvar state encoderState\n\treset := func() {\n\t\tstate = encoderState{\n\t\t\tpaintKey: paintKey{\n\t\t\t\tcolor: color.NRGBA{A: 0xff},\n\t\t\t},\n\t\t}\n\t}\n\treset()\n\tr := &c.reader\n\tvar (\n\t\tpathData struct {\n\t\t\tdata []byte\n\t\t\tkey ops.Key\n\t\t\thash uint64\n\t\t}\n\t\tstrWidth float32\n\t)\n\tc.addClip(&state, fview, fview, nil, ops.Key{}, 0, 0, false)\n\tfor encOp, ok := r.Decode(); ok; encOp, ok = r.Decode() {\n\t\tswitch ops.OpType(encOp.Data[0]) {\n\t\tcase ops.TypeProfile:\n\t\t\tc.profile = true\n\t\tcase ops.TypeTransform:\n\t\t\tdop, push := ops.DecodeTransform(encOp.Data)\n\t\t\tif push {\n\t\t\t\tc.transStack = append(c.transStack, transEntry{t: state.t, relTrans: state.relTrans})\n\t\t\t}\n\t\t\tstate.t = state.t.Mul(dop)\n\t\t\tstate.relTrans = state.relTrans.Mul(dop)\n\t\tcase ops.TypePopTransform:\n\t\t\tn := len(c.transStack)\n\t\t\tst := c.transStack[n-1]\n\t\t\tc.transStack = c.transStack[:n-1]\n\t\t\tstate.t = st.t\n\t\t\tstate.relTrans = st.relTrans\n\t\tcase ops.TypeStroke:\n\t\t\tstrWidth = decodeStrokeOp(encOp.Data)\n\t\tcase ops.TypePath:\n\t\t\thash := bo.Uint64(encOp.Data[1:])\n\t\t\tencOp, ok = r.Decode()\n\t\t\tif !ok {\n\t\t\t\tpanic(\"unexpected end of path operation\")\n\t\t\t}\n\t\t\tpathData.data = encOp.Data[ops.TypeAuxLen:]\n\t\t\tpathData.key = encOp.Key\n\t\t\tpathData.hash = hash\n\t\tcase ops.TypeClip:\n\t\t\tvar op ops.ClipOp\n\t\t\top.Decode(encOp.Data)\n\t\t\tbounds := layout.FRect(op.Bounds)\n\t\t\tc.addClip(&state, fview, bounds, pathData.data, pathData.key, pathData.hash, strWidth, true)\n\t\t\tpathData.data = nil\n\t\t\tstrWidth = 0\n\t\tcase ops.TypePopClip:\n\t\t\tstate.relTrans = state.clip.relTrans.Mul(state.relTrans)\n\t\t\tstate.clip = state.clip.parent\n\t\tcase ops.TypeColor:\n\t\t\tstate.matType = materialColor\n\t\t\tstate.color = decodeColorOp(encOp.Data)\n\t\tcase ops.TypeLinearGradient:\n\t\t\tstate.matType = materialLinearGradient\n\t\t\top := decodeLinearGradientOp(encOp.Data)\n\t\t\tstate.stop1 = op.stop1\n\t\t\tstate.stop2 = op.stop2\n\t\t\tstate.color1 = op.color1\n\t\t\tstate.color2 = op.color2\n\t\tcase ops.TypeImage:\n\t\t\tstate.matType = materialTexture\n\t\t\tstate.image = decodeImageOp(encOp.Data, encOp.Refs)\n\t\tcase ops.TypePaint:\n\t\t\tpaintState := state\n\t\t\tif paintState.matType == materialTexture {\n\t\t\t\t// Clip to the bounds of the image, to hide other images in the atlas.\n\t\t\t\tsz := state.image.src.Rect.Size()\n\t\t\t\tbounds := f32.Rectangle{Max: layout.FPt(sz)}\n\t\t\t\tc.addClip(&paintState, fview, bounds, nil, ops.Key{}, 0, 0, false)\n\t\t\t}\n\t\t\tintersect := paintState.clip.intersect\n\t\t\tif intersect.Empty() {\n\t\t\t\tbreak\n\t\t\t}\n\n\t\t\t// If the paint is a uniform opaque color that takes up the whole\n\t\t\t// screen, it covers all previous paints and we can discard all\n\t\t\t// rendering commands recorded so far.\n\t\t\tif paintState.clip == nil && paintState.matType == materialColor && paintState.color.A == 255 {\n\t\t\t\tc.clearColor = f32color.LinearFromSRGB(paintState.color).Opaque()\n\t\t\t\tc.clear = true\n\t\t\t\tc.frame.reset()\n\t\t\t\tbreak\n\t\t\t}\n\n\t\t\t// Flatten clip stack.\n\t\t\tp := paintState.clip\n\t\t\tstartIdx := len(c.frame.clipCmds)\n\t\t\tfor p != nil {\n\t\t\t\tidx := len(c.frame.paths)\n\t\t\t\tc.frame.paths = append(c.frame.paths, make([]byte, len(p.path))...)\n\t\t\t\tpath := c.frame.paths[idx:]\n\t\t\t\tcopy(path, p.path)\n\t\t\t\tc.frame.clipCmds = append(c.frame.clipCmds, clipCmd{\n\t\t\t\t\tstate: p.clipKey,\n\t\t\t\t\tpath: path,\n\t\t\t\t\tpathKey: p.pathKey,\n\t\t\t\t\tabsBounds: p.absBounds,\n\t\t\t\t})\n\t\t\t\tp = p.parent\n\t\t\t}\n\t\t\tclipStack := c.frame.clipCmds[startIdx:]\n\t\t\tc.frame.ops = append(c.frame.ops, paintOp{\n\t\t\t\tclipStack: clipStack,\n\t\t\t\tstate: paintState.paintKey,\n\t\t\t\tintersect: intersect,\n\t\t\t})\n\t\tcase ops.TypeSave:\n\t\t\tid := ops.DecodeSave(encOp.Data)\n\t\t\tc.save(id, state.t)\n\t\tcase ops.TypeLoad:\n\t\t\treset()\n\t\t\tid := ops.DecodeLoad(encOp.Data)\n\t\t\tstate.t = c.states[id]\n\t\t\tstate.relTrans = state.t\n\t\t}\n\t}\n\tfor i := range c.frame.ops {\n\t\top := &c.frame.ops[i]\n\t\t// For each clip, cull rectangular clip regions that contain its\n\t\t// (transformed) bounds. addClip already handled the converse case.\n\t\t// TODO: do better than O(n²) to efficiently deal with deep stacks.\n\t\tfor j := 0; j < len(op.clipStack)-1; j++ {\n\t\t\tcl := op.clipStack[j]\n\t\t\tp := cl.state\n\t\t\tr := transformBounds(p.relTrans, p.bounds)\n\t\t\tfor k := j + 1; k < len(op.clipStack); k++ {\n\t\t\t\tcl2 := op.clipStack[k]\n\t\t\t\tp2 := cl2.state\n\t\t\t\tif len(cl2.path) == 0 && r.In(cl2.state.bounds) {\n\t\t\t\t\top.clipStack = append(op.clipStack[:k], op.clipStack[k+1:]...)\n\t\t\t\t\tk--\n\t\t\t\t\top.clipStack[k].state.relTrans = p2.relTrans.Mul(op.clipStack[k].state.relTrans)\n\t\t\t\t}\n\t\t\t\tr = transformRect(p2.relTrans, r)\n\t\t\t}\n\t\t}\n\t\t// Separate the integer offset from the first transform. Two ops that differ\n\t\t// only in integer offsets may share backing storage.\n\t\tif len(op.clipStack) > 0 {\n\t\t\tc := &op.clipStack[len(op.clipStack)-1]\n\t\t\tt := c.state.relTrans\n\t\t\tt, off := separateTransform(t)\n\t\t\tc.state.relTrans = t\n\t\t\top.offset = off\n\t\t\top.state.t = op.state.t.Offset(layout.FPt(off.Mul(-1)))\n\t\t}\n\t\top.hash = c.hashOp(*op)\n\t\top.texOpIdx = -1\n\t\tswitch op.state.matType {\n\t\tcase materialTexture:\n\t\t\top.texOpIdx = len(*texOps)\n\t\t\t// Separate integer offset from transformation. TextureOps that have identical transforms\n\t\t\t// except for their integer offsets can share a transformed image.\n\t\t\tt := op.state.t.Offset(layout.FPt(op.offset))\n\t\t\tt, off := separateTransform(t)\n\t\t\tbounds := boundRectF(op.intersect).Sub(off)\n\t\t\t*texOps = append(*texOps, textureOp{\n\t\t\t\timg: op.state.image,\n\t\t\t\toff: off,\n\t\t\t\tkey: textureKey{\n\t\t\t\t\tbounds: bounds,\n\t\t\t\t\ttransform: t,\n\t\t\t\t\thandle: op.state.image.handle,\n\t\t\t\t},\n\t\t\t})\n\t\t}\n\t}\n}\n\nfunc (c *collector) hashOp(op paintOp) uint64 {\n\tc.hasher.Reset()\n\tfor _, cl := range op.clipStack {\n\t\tk := cl.state\n\t\tkeyBytes := (*[unsafe.Sizeof(k)]byte)(unsafe.Pointer(unsafe.Pointer(&k)))\n\t\tc.hasher.Write(keyBytes[:])\n\t}\n\tk := op.state\n\tkeyBytes := (*[unsafe.Sizeof(k)]byte)(unsafe.Pointer(unsafe.Pointer(&k)))\n\tc.hasher.Write(keyBytes[:])\n\treturn c.hasher.Sum64()\n}\n\nfunc (g *compute) layer(viewport image.Point, texOps []textureOp) {\n\t// Sort ops from previous frames by hash.\n\tc := &g.collector\n\tprevOps := c.prevFrame.ops\n\tc.order = c.order[:0]\n\tfor i, op := range prevOps {\n\t\tc.order = append(c.order, hashIndex{\n\t\t\tindex: i,\n\t\t\thash: op.hash,\n\t\t})\n\t}\n\tsort.Slice(c.order, func(i, j int) bool {\n\t\treturn c.order[i].hash < c.order[j].hash\n\t})\n\t// Split layers with different materials atlas; the compute stage has only\n\t// one materials slot.\n\tsplitLayer := func(ops []paintOp, prevLayerIdx int) {\n\t\tfor len(ops) > 0 {\n\t\t\tvar materials *textureAtlas\n\t\t\tidx := 0\n\t\t\tfor idx < len(ops) {\n\t\t\t\tif i := ops[idx].texOpIdx; i != -1 {\n\t\t\t\t\tomats := texOps[i].matAlloc.alloc.atlas\n\t\t\t\t\tif materials != nil && omats != nil && omats != materials {\n\t\t\t\t\t\tbreak\n\t\t\t\t\t}\n\t\t\t\t\tmaterials = omats\n\t\t\t\t}\n\t\t\t\tidx++\n\t\t\t}\n\t\t\tl := layer{ops: ops[:idx], materials: materials}\n\t\t\tif prevLayerIdx != -1 {\n\t\t\t\tprev := c.prevFrame.layers[prevLayerIdx]\n\t\t\t\tif !prev.alloc.dead && len(prev.ops) == len(l.ops) {\n\t\t\t\t\tl.alloc = prev.alloc\n\t\t\t\t\tl.materials = prev.materials\n\t\t\t\t\tg.touchAlloc(l.alloc)\n\t\t\t\t}\n\t\t\t}\n\t\t\tfor i, op := range l.ops {\n\t\t\t\tl.rect = l.rect.Union(boundRectF(op.intersect))\n\t\t\t\tl.ops[i].layer = len(c.frame.layers)\n\t\t\t}\n\t\t\tc.frame.layers = append(c.frame.layers, l)\n\t\t\tops = ops[idx:]\n\t\t}\n\t}\n\tops := c.frame.ops\n\tidx := 0\n\tfor idx < len(ops) {\n\t\top := ops[idx]\n\t\t// Search for longest matching op sequence.\n\t\t// start is the earliest index of a match.\n\t\tstart := searchOp(c.order, op.hash)\n\t\tlayerOps, prevLayerIdx := longestLayer(prevOps, c.order[start:], ops[idx:])\n\t\tif len(layerOps) == 0 {\n\t\t\tidx++\n\t\t\tcontinue\n\t\t}\n\t\tif unmatched := ops[:idx]; len(unmatched) > 0 {\n\t\t\t// Flush layer of unmatched ops.\n\t\t\tsplitLayer(unmatched, -1)\n\t\t\tops = ops[idx:]\n\t\t\tidx = 0\n\t\t}\n\t\tsplitLayer(layerOps, prevLayerIdx)\n\t\tops = ops[len(layerOps):]\n\t}\n\tif len(ops) > 0 {\n\t\tsplitLayer(ops, -1)\n\t}\n}\n\nfunc longestLayer(prev []paintOp, order []hashIndex, ops []paintOp) ([]paintOp, int) {\n\tlongest := 0\n\tlongestIdx := -1\nouter:\n\tfor len(order) > 0 {\n\t\tfirst := order[0]\n\t\torder = order[1:]\n\t\tmatch := prev[first.index:]\n\t\t// Potential match found. Now find longest matching sequence.\n\t\tend := 0\n\t\tlayer := match[0].layer\n\t\toff := match[0].offset.Sub(ops[0].offset)\n\t\tfor end < len(match) && end < len(ops) {\n\t\t\tm := match[end]\n\t\t\to := ops[end]\n\t\t\t// End layers on previous match.\n\t\t\tif m.layer != layer {\n\t\t\t\tbreak\n\t\t\t}\n\t\t\t// End layer when the next op doesn't match.\n\t\t\tif m.hash != o.hash {\n\t\t\t\tif end == 0 {\n\t\t\t\t\t// Hashes are sorted so if the first op doesn't match, no\n\t\t\t\t\t// more matches are possible.\n\t\t\t\t\tbreak outer\n\t\t\t\t}\n\t\t\t\tbreak\n\t\t\t}\n\t\t\tif !opEqual(off, m, o) {\n\t\t\t\tbreak\n\t\t\t}\n\t\t\tend++\n\t\t}\n\t\tif end > longest {\n\t\t\tlongest = end\n\t\t\tlongestIdx = layer\n\n\t\t}\n\t}\n\treturn ops[:longest], longestIdx\n}\n\nfunc searchOp(order []hashIndex, hash uint64) int {\n\tlo, hi := 0, len(order)\n\tfor lo < hi {\n\t\tmid := (lo + hi) / 2\n\t\tif order[mid].hash < hash {\n\t\t\tlo = mid + 1\n\t\t} else {\n\t\t\thi = mid\n\t\t}\n\t}\n\treturn lo\n}\n\nfunc opEqual(off image.Point, o1 paintOp, o2 paintOp) bool {\n\tif len(o1.clipStack) != len(o2.clipStack) {\n\t\treturn false\n\t}\n\tif o1.state != o2.state {\n\t\treturn false\n\t}\n\tif o1.offset.Sub(o2.offset) != off {\n\t\treturn false\n\t}\n\tfor i, cl1 := range o1.clipStack {\n\t\tcl2 := o2.clipStack[i]\n\t\tif len(cl1.path) != len(cl2.path) {\n\t\t\treturn false\n\t\t}\n\t\tif cl1.state != cl2.state {\n\t\t\treturn false\n\t\t}\n\t\tif cl1.pathKey != cl2.pathKey && !bytes.Equal(cl1.path, cl2.path) {\n\t\t\treturn false\n\t\t}\n\t}\n\treturn true\n}\n\nfunc encodeLayer(l layer, pos image.Point, viewport image.Point, enc *encoder, texOps []textureOp) {\n\toff := pos.Sub(l.rect.Min)\n\tofff := layout.FPt(off)\n\n\tenc.transform(f32.Affine2D{}.Offset(offf))\n\tfor _, op := range l.ops {\n\t\tencodeOp(viewport, off, enc, texOps, op)\n\t}\n\tenc.transform(f32.Affine2D{}.Offset(offf.Mul(-1)))\n}\n\nfunc encodeOp(viewport image.Point, absOff image.Point, enc *encoder, texOps []textureOp, op paintOp) {\n\t// Fill in clip bounds, which the shaders expect to be the union\n\t// of all affected bounds.\n\tvar union f32.Rectangle\n\tfor i, cl := range op.clipStack {\n\t\tunion = union.Union(cl.absBounds)\n\t\top.clipStack[i].union = union\n\t}\n\n\tabsOfff := layout.FPt(absOff)\n\tfillMode := scene.FillModeNonzero\n\topOff := layout.FPt(op.offset)\n\tinv := f32.Affine2D{}.Offset(opOff)\n\tenc.transform(inv)\n\tfor i := len(op.clipStack) - 1; i >= 0; i-- {\n\t\tcl := op.clipStack[i]\n\t\tif w := cl.state.strokeWidth; w > 0 {\n\t\t\tenc.fillMode(scene.FillModeStroke)\n\t\t\tenc.lineWidth(w)\n\t\t\tfillMode = scene.FillModeStroke\n\t\t} else if fillMode != scene.FillModeNonzero {\n\t\t\tenc.fillMode(scene.FillModeNonzero)\n\t\t\tfillMode = scene.FillModeNonzero\n\t\t}\n\t\tenc.transform(cl.state.relTrans)\n\t\tinv = inv.Mul(cl.state.relTrans)\n\t\tif len(cl.path) == 0 {\n\t\t\tenc.rect(cl.state.bounds)\n\t\t} else {\n\t\t\tenc.encodePath(cl.path, fillMode)\n\t\t}\n\t\tif i != 0 {\n\t\t\tenc.beginClip(cl.union.Add(absOfff))\n\t\t}\n\t}\n\tif len(op.clipStack) == 0 {\n\t\t// No clipping; fill the entire view.\n\t\tenc.rect(f32.Rectangle{Max: layout.FPt(viewport)})\n\t}\n\n\tswitch op.state.matType {\n\tcase materialTexture:\n\t\ttexOp := texOps[op.texOpIdx]\n\t\toff := texOp.matAlloc.alloc.rect.Min.Add(texOp.matAlloc.offset).Sub(texOp.off).Sub(absOff)\n\t\tenc.fillImage(0, off)\n\tcase materialColor:\n\t\tenc.fillColor(f32color.NRGBAToRGBA(op.state.color))\n\tcase materialLinearGradient:\n\t\t// TODO: implement.\n\t\tenc.fillColor(f32color.NRGBAToRGBA(op.state.color1))\n\tdefault:\n\t\tpanic(\"not implemented\")\n\t}\n\tenc.transform(inv.Invert())\n\t// Pop the clip stack, except the first entry used for fill.\n\tfor i := 1; i < len(op.clipStack); i++ {\n\t\tcl := op.clipStack[i]\n\t\tenc.endClip(cl.union.Add(absOfff))\n\t}\n\tif fillMode != scene.FillModeNonzero {\n\t\tenc.fillMode(scene.FillModeNonzero)\n\t}\n}\n\nfunc (c *collector) save(id int, state f32.Affine2D) {\n\tif extra := id - len(c.states) + 1; extra > 0 {\n\t\tc.states = append(c.states, make([]f32.Affine2D, extra)...)\n\t}\n\tc.states[id] = state\n}\n\nfunc transformBounds(t f32.Affine2D, bounds f32.Rectangle) rectangle {\n\treturn rectangle{\n\t\tt.Transform(bounds.Min), t.Transform(f32.Pt(bounds.Max.X, bounds.Min.Y)),\n\t\tt.Transform(bounds.Max), t.Transform(f32.Pt(bounds.Min.X, bounds.Max.Y)),\n\t}\n}\n\nfunc separateTransform(t f32.Affine2D) (f32.Affine2D, image.Point) {\n\tsx, hx, ox, hy, sy, oy := t.Elems()\n\tintx, fracx := math.Modf(float64(ox))\n\tinty, fracy := math.Modf(float64(oy))\n\tt = f32.NewAffine2D(sx, hx, float32(fracx), hy, sy, float32(fracy))\n\treturn t, image.Pt(int(intx), int(inty))\n}\n\nfunc transformRect(t f32.Affine2D, r rectangle) rectangle {\n\tvar tr rectangle\n\tfor i, c := range r {\n\t\ttr[i] = t.Transform(c)\n\t}\n\treturn tr\n}\n\nfunc (r rectangle) In(b f32.Rectangle) bool {\n\tfor _, c := range r {\n\t\tinside := b.Min.X <= c.X && c.X <= b.Max.X &&\n\t\t\tb.Min.Y <= c.Y && c.Y <= b.Max.Y\n\t\tif !inside {\n\t\t\treturn false\n\t\t}\n\t}\n\treturn true\n}\n\nfunc (r rectangle) Contains(b f32.Rectangle) bool {\n\treturn true\n}\n\nfunc (r rectangle) Bounds() f32.Rectangle {\n\tbounds := f32.Rectangle{\n\t\tMin: f32.Pt(math.MaxFloat32, math.MaxFloat32),\n\t\tMax: f32.Pt(-math.MaxFloat32, -math.MaxFloat32),\n\t}\n\tfor _, c := range r {\n\t\tif c.X < bounds.Min.X {\n\t\t\tbounds.Min.X = c.X\n\t\t}\n\t\tif c.Y < bounds.Min.Y {\n\t\t\tbounds.Min.Y = c.Y\n\t\t}\n\t\tif c.X > bounds.Max.X {\n\t\t\tbounds.Max.X = c.X\n\t\t}\n\t\tif c.Y > bounds.Max.Y {\n\t\t\tbounds.Max.Y = c.Y\n\t\t}\n\t}\n\treturn bounds\n}\n"
},
{
"path": "vendor/gioui.org/gpu/cpu.go",
"content": "// SPDX-License-Identifier: Unlicense OR MIT\n\npackage gpu\n\nimport (\n\t\"unsafe\"\n\n\t\"gioui.org/cpu\"\n)\n\n// This file contains code specific to running compute shaders on the CPU.\n\n// dispatcher dispatches CPU compute programs across multiple goroutines.\ntype dispatcher struct {\n\t// done is notified when a worker completes its work slice.\n\tdone chan struct{}\n\t// work receives work slice indices. It is closed when the dispatcher is released.\n\twork chan work\n\t// dispatch receives compute jobs, which is then split among workers.\n\tdispatch chan dispatch\n\t// sync receives notification when a Sync completes.\n\tsync chan struct{}\n}\n\ntype work struct {\n\tctx *cpu.DispatchContext\n\tindex int\n}\n\ntype dispatch struct {\n\t_type jobType\n\tprogram *cpu.ProgramInfo\n\tdescSet unsafe.Pointer\n\tx, y, z int\n}\n\ntype jobType uint8\n\nconst (\n\tjobDispatch jobType = iota\n\tjobBarrier\n\tjobSync\n)\n\nfunc newDispatcher(workers int) *dispatcher {\n\td := &dispatcher{\n\t\twork: make(chan work, workers),\n\t\tdone: make(chan struct{}, workers),\n\t\t// Leave some room to avoid blocking calls to Dispatch.\n\t\tdispatch: make(chan dispatch, 20),\n\t\tsync: make(chan struct{}),\n\t}\n\tfor i := 0; i < workers; i++ {\n\t\tgo d.worker()\n\t}\n\tgo d.dispatcher()\n\treturn d\n}\n\nfunc (d *dispatcher) dispatcher() {\n\tdefer close(d.work)\n\tvar free []*cpu.DispatchContext\n\tdefer func() {\n\t\tfor _, ctx := range free {\n\t\t\tctx.Free()\n\t\t}\n\t}()\n\tvar used []*cpu.DispatchContext\n\tfor job := range d.dispatch {\n\t\tswitch job._type {\n\t\tcase jobDispatch:\n\t\t\tif len(free) == 0 {\n\t\t\t\tfree = append(free, cpu.NewDispatchContext())\n\t\t\t}\n\t\t\tctx := free[len(free)-1]\n\t\t\tfree = free[:len(free)-1]\n\t\t\tused = append(used, ctx)\n\t\t\tctx.Prepare(cap(d.work), job.program, job.descSet, job.x, job.y, job.z)\n\t\t\tfor i := 0; i < cap(d.work); i++ {\n\t\t\t\td.work <- work{\n\t\t\t\t\tctx: ctx,\n\t\t\t\t\tindex: i,\n\t\t\t\t}\n\t\t\t}\n\t\tcase jobBarrier:\n\t\t\t// Wait for all outstanding dispatches to complete.\n\t\t\tfor i := 0; i < len(used)*cap(d.work); i++ {\n\t\t\t\t<-d.done\n\t\t\t}\n\t\t\tfree = append(free, used...)\n\t\t\tused = used[:0]\n\t\tcase jobSync:\n\t\t\td.sync <- struct{}{}\n\t\t}\n\t}\n}\n\nfunc (d *dispatcher) worker() {\n\tthread := cpu.NewThreadContext()\n\tdefer thread.Free()\n\tfor w := range d.work {\n\t\tw.ctx.Dispatch(w.index, thread)\n\t\td.done <- struct{}{}\n\t}\n}\n\nfunc (d *dispatcher) Barrier() {\n\td.dispatch <- dispatch{_type: jobBarrier}\n}\n\nfunc (d *dispatcher) Sync() {\n\td.dispatch <- dispatch{_type: jobSync}\n\t<-d.sync\n}\n\nfunc (d *dispatcher) Dispatch(program *cpu.ProgramInfo, descSet unsafe.Pointer, x, y, z int) {\n\td.dispatch <- dispatch{\n\t\t_type: jobDispatch,\n\t\tprogram: program,\n\t\tdescSet: descSet,\n\t\tx: x,\n\t\ty: y,\n\t\tz: z,\n\t}\n}\n\nfunc (d *dispatcher) Stop() {\n\tclose(d.dispatch)\n}\n"
},
{
"path": "vendor/gioui.org/gpu/gpu.go",
"content": "// SPDX-License-Identifier: Unlicense OR MIT\n\n/*\nPackage gpu implements the rendering of Gio drawing operations. It\nis used by package app and package app/headless and is otherwise not\nuseful except for integrating with external window implementations.\n*/\npackage gpu\n\nimport (\n\t\"encoding/binary\"\n\t\"fmt\"\n\t\"image\"\n\t\"image/color\"\n\t\"math\"\n\t\"os\"\n\t\"reflect\"\n\t\"time\"\n\t\"unsafe\"\n\n\t\"gioui.org/f32\"\n\t\"gioui.org/gpu/internal/driver\"\n\t\"gioui.org/internal/byteslice\"\n\t\"gioui.org/internal/f32color\"\n\t\"gioui.org/internal/ops\"\n\t\"gioui.org/internal/scene\"\n\t\"gioui.org/internal/stroke\"\n\t\"gioui.org/layout\"\n\t\"gioui.org/op\"\n\t\"gioui.org/shader\"\n\t\"gioui.org/shader/gio\"\n\n\t// Register backends.\n\t_ \"gioui.org/gpu/internal/d3d11\"\n\t_ \"gioui.org/gpu/internal/metal\"\n\t_ \"gioui.org/gpu/internal/opengl\"\n\t_ \"gioui.org/gpu/internal/vulkan\"\n)\n\ntype GPU interface {\n\t// Release non-Go resources. The GPU is no longer valid after Release.\n\tRelease()\n\t// Clear sets the clear color for the next Frame.\n\tClear(color color.NRGBA)\n\t// Frame draws the graphics operations from op into a viewport of target.\n\tFrame(frame *op.Ops, target RenderTarget, viewport image.Point) error\n\t// Profile returns the last available profiling information. Profiling\n\t// information is requested when Frame sees an io/profile.Op, and the result\n\t// is available through Profile at some later time.\n\tProfile() string\n}\n\ntype gpu struct {\n\tcache *resourceCache\n\n\tprofile string\n\ttimers *timers\n\tframeStart time.Time\n\tstencilTimer, coverTimer, cleanupTimer *timer\n\tdrawOps drawOps\n\tctx driver.Device\n\trenderer *renderer\n}\n\ntype renderer struct {\n\tctx driver.Device\n\tblitter *blitter\n\tpather *pather\n\tpacker packer\n\tintersections packer\n}\n\ntype drawOps struct {\n\tprofile bool\n\treader ops.Reader\n\tstates []f32.Affine2D\n\ttransStack []f32.Affine2D\n\tvertCache []byte\n\tviewport image.Point\n\tclear bool\n\tclearColor f32color.RGBA\n\timageOps []imageOp\n\tpathOps []*pathOp\n\tpathOpCache []pathOp\n\tqs quadSplitter\n\tpathCache *opCache\n}\n\ntype drawState struct {\n\tt f32.Affine2D\n\tcpath *pathOp\n\n\tmatType materialType\n\t// Current paint.ImageOp\n\timage imageOpData\n\t// Current paint.ColorOp, if any.\n\tcolor color.NRGBA\n\n\t// Current paint.LinearGradientOp.\n\tstop1 f32.Point\n\tstop2 f32.Point\n\tcolor1 color.NRGBA\n\tcolor2 color.NRGBA\n}\n\ntype pathOp struct {\n\toff f32.Point\n\t// rect tracks whether the clip stack can be represented by a\n\t// pixel-aligned rectangle.\n\trect bool\n\t// clip is the union of all\n\t// later clip rectangles.\n\tclip image.Rectangle\n\tbounds f32.Rectangle\n\t// intersect is the intersection of bounds and all\n\t// previous clip bounds.\n\tintersect f32.Rectangle\n\tpathKey opKey\n\tpath bool\n\tpathVerts []byte\n\tparent *pathOp\n\tplace placement\n}\n\ntype imageOp struct {\n\tpath *pathOp\n\tclip image.Rectangle\n\tmaterial material\n\tclipType clipType\n\tplace placement\n}\n\nfunc decodeStrokeOp(data []byte) float32 {\n\t_ = data[4]\n\tbo := binary.LittleEndian\n\treturn math.Float32frombits(bo.Uint32(data[1:]))\n}\n\ntype quadsOp struct {\n\tkey opKey\n\taux []byte\n}\n\ntype opKey struct {\n\toutline bool\n\tstrokeWidth float32\n\tsx, hx, sy, hy float32\n\tops.Key\n}\n\ntype material struct {\n\tmaterial materialType\n\topaque bool\n\t// For materialTypeColor.\n\tcolor f32color.RGBA\n\t// For materialTypeLinearGradient.\n\tcolor1 f32color.RGBA\n\tcolor2 f32color.RGBA\n\t// For materialTypeTexture.\n\tdata imageOpData\n\tuvTrans f32.Affine2D\n}\n\n// imageOpData is the shadow of paint.ImageOp.\ntype imageOpData struct {\n\tsrc *image.RGBA\n\thandle interface{}\n}\n\ntype linearGradientOpData struct {\n\tstop1 f32.Point\n\tcolor1 color.NRGBA\n\tstop2 f32.Point\n\tcolor2 color.NRGBA\n}\n\nfunc decodeImageOp(data []byte, refs []interface{}) imageOpData {\n\thandle := refs[1]\n\tif handle == nil {\n\t\treturn imageOpData{}\n\t}\n\treturn imageOpData{\n\t\tsrc: refs[0].(*image.RGBA),\n\t\thandle: handle,\n\t}\n}\n\nfunc decodeColorOp(data []byte) color.NRGBA {\n\treturn color.NRGBA{\n\t\tR: data[1],\n\t\tG: data[2],\n\t\tB: data[3],\n\t\tA: data[4],\n\t}\n}\n\nfunc decodeLinearGradientOp(data []byte) linearGradientOpData {\n\tbo := binary.LittleEndian\n\treturn linearGradientOpData{\n\t\tstop1: f32.Point{\n\t\t\tX: math.Float32frombits(bo.Uint32(data[1:])),\n\t\t\tY: math.Float32frombits(bo.Uint32(data[5:])),\n\t\t},\n\t\tstop2: f32.Point{\n\t\t\tX: math.Float32frombits(bo.Uint32(data[9:])),\n\t\t\tY: math.Float32frombits(bo.Uint32(data[13:])),\n\t\t},\n\t\tcolor1: color.NRGBA{\n\t\t\tR: data[17+0],\n\t\t\tG: data[17+1],\n\t\t\tB: data[17+2],\n\t\t\tA: data[17+3],\n\t\t},\n\t\tcolor2: color.NRGBA{\n\t\t\tR: data[21+0],\n\t\t\tG: data[21+1],\n\t\t\tB: data[21+2],\n\t\t\tA: data[21+3],\n\t\t},\n\t}\n}\n\ntype clipType uint8\n\ntype resource interface {\n\trelease()\n}\n\ntype texture struct {\n\tsrc *image.RGBA\n\ttex driver.Texture\n}\n\ntype blitter struct {\n\tctx driver.Device\n\tviewport image.Point\n\tpipelines [3]*pipeline\n\tcolUniforms *blitColUniforms\n\ttexUniforms *blitTexUniforms\n\tlinearGradientUniforms *blitLinearGradientUniforms\n\tquadVerts driver.Buffer\n}\n\ntype blitColUniforms struct {\n\tblitUniforms\n\t_ [128 - unsafe.Sizeof(blitUniforms{}) - unsafe.Sizeof(colorUniforms{})]byte // Padding to 128 bytes.\n\tcolorUniforms\n}\n\ntype blitTexUniforms struct {\n\tblitUniforms\n}\n\ntype blitLinearGradientUniforms struct {\n\tblitUniforms\n\t_ [128 - unsafe.Sizeof(blitUniforms{}) - unsafe.Sizeof(gradientUniforms{})]byte // Padding to 128 bytes.\n\tgradientUniforms\n}\n\ntype uniformBuffer struct {\n\tbuf driver.Buffer\n\tptr []byte\n}\n\ntype pipeline struct {\n\tpipeline driver.Pipeline\n\tuniforms *uniformBuffer\n}\n\ntype blitUniforms struct {\n\ttransform [4]float32\n\tuvTransformR1 [4]float32\n\tuvTransformR2 [4]float32\n}\n\ntype colorUniforms struct {\n\tcolor f32color.RGBA\n}\n\ntype gradientUniforms struct {\n\tcolor1 f32color.RGBA\n\tcolor2 f32color.RGBA\n}\n\ntype materialType uint8\n\nconst (\n\tclipTypeNone clipType = iota\n\tclipTypePath\n\tclipTypeIntersection\n)\n\nconst (\n\tmaterialColor materialType = iota\n\tmaterialLinearGradient\n\tmaterialTexture\n)\n\n// New creates a GPU for the given API.\nfunc New(api API) (GPU, error) {\n\td, err := driver.NewDevice(api)\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\treturn NewWithDevice(d)\n}\n\n// NewWithDevice creates a GPU with a pre-existing device.\n//\n// Note: for internal use only.\nfunc NewWithDevice(d driver.Device) (GPU, error) {\n\td.BeginFrame(nil, false, image.Point{})\n\tdefer d.EndFrame()\n\tforceCompute := os.Getenv(\"GIORENDERER\") == \"forcecompute\"\n\tfeats := d.Caps().Features\n\tswitch {\n\tcase !forceCompute && feats.Has(driver.FeatureFloatRenderTargets) && feats.Has(driver.FeatureSRGB):\n\t\treturn newGPU(d)\n\t}\n\treturn newCompute(d)\n}\n\nfunc newGPU(ctx driver.Device) (*gpu, error) {\n\tg := &gpu{\n\t\tcache: newResourceCache(),\n\t}\n\tg.drawOps.pathCache = newOpCache()\n\tif err := g.init(ctx); err != nil {\n\t\treturn nil, err\n\t}\n\treturn g, nil\n}\n\nfunc (g *gpu) init(ctx driver.Device) error {\n\tg.ctx = ctx\n\tg.renderer = newRenderer(ctx)\n\treturn nil\n}\n\nfunc (g *gpu) Clear(col color.NRGBA) {\n\tg.drawOps.clear = true\n\tg.drawOps.clearColor = f32color.LinearFromSRGB(col)\n}\n\nfunc (g *gpu) Release() {\n\tg.renderer.release()\n\tg.drawOps.pathCache.release()\n\tg.cache.release()\n\tif g.timers != nil {\n\t\tg.timers.Release()\n\t}\n\tg.ctx.Release()\n}\n\nfunc (g *gpu) Frame(frameOps *op.Ops, target RenderTarget, viewport image.Point) error {\n\tg.collect(viewport, frameOps)\n\treturn g.frame(target)\n}\n\nfunc (g *gpu) collect(viewport image.Point, frameOps *op.Ops) {\n\tg.renderer.blitter.viewport = viewport\n\tg.renderer.pather.viewport = viewport\n\tg.drawOps.reset(viewport)\n\tg.drawOps.collect(frameOps, viewport)\n\tg.frameStart = time.Now()\n\tif g.drawOps.profile && g.timers == nil && g.ctx.Caps().Features.Has(driver.FeatureTimers) {\n\t\tg.timers = newTimers(g.ctx)\n\t\tg.stencilTimer = g.timers.newTimer()\n\t\tg.coverTimer = g.timers.newTimer()\n\t\tg.cleanupTimer = g.timers.newTimer()\n\t}\n}\n\nfunc (g *gpu) frame(target RenderTarget) error {\n\tviewport := g.renderer.blitter.viewport\n\tdefFBO := g.ctx.BeginFrame(target, g.drawOps.clear, viewport)\n\tdefer g.ctx.EndFrame()\n\tg.drawOps.buildPaths(g.ctx)\n\tfor _, img := range g.drawOps.imageOps {\n\t\texpandPathOp(img.path, img.clip)\n\t}\n\tg.stencilTimer.begin()\n\tg.renderer.packStencils(&g.drawOps.pathOps)\n\tg.renderer.stencilClips(g.drawOps.pathCache, g.drawOps.pathOps)\n\tg.renderer.packIntersections(g.drawOps.imageOps)\n\tg.renderer.prepareIntersections(g.drawOps.imageOps)\n\tg.renderer.intersect(g.drawOps.imageOps)\n\tg.stencilTimer.end()\n\tg.coverTimer.begin()\n\tg.renderer.uploadImages(g.cache, g.drawOps.imageOps)\n\tg.renderer.prepareDrawOps(g.cache, g.drawOps.imageOps)\n\td := driver.LoadDesc{\n\t\tClearColor: g.drawOps.clearColor,\n\t}\n\tif g.drawOps.clear {\n\t\tg.drawOps.clear = false\n\t\td.Action = driver.LoadActionClear\n\t}\n\tg.ctx.BeginRenderPass(defFBO, d)\n\tg.ctx.Viewport(0, 0, viewport.X, viewport.Y)\n\tg.renderer.drawOps(g.cache, g.drawOps.imageOps)\n\tg.coverTimer.end()\n\tg.ctx.EndRenderPass()\n\tg.cleanupTimer.begin()\n\tg.cache.frame()\n\tg.drawOps.pathCache.frame()\n\tg.cleanupTimer.end()\n\tif g.drawOps.profile && g.timers.ready() {\n\t\tst, covt, cleant := g.stencilTimer.Elapsed, g.coverTimer.Elapsed, g.cleanupTimer.Elapsed\n\t\tft := st + covt + cleant\n\t\tq := 100 * time.Microsecond\n\t\tst, covt = st.Round(q), covt.Round(q)\n\t\tframeDur := time.Since(g.frameStart).Round(q)\n\t\tft = ft.Round(q)\n\t\tg.profile = fmt.Sprintf(\"draw:%7s gpu:%7s st:%7s cov:%7s\", frameDur, ft, st, covt)\n\t}\n\treturn nil\n}\n\nfunc (g *gpu) Profile() string {\n\treturn g.profile\n}\n\nfunc (r *renderer) texHandle(cache *resourceCache, data imageOpData) driver.Texture {\n\tvar tex *texture\n\tt, exists := cache.get(data.handle)\n\tif !exists {\n\t\tt = &texture{\n\t\t\tsrc: data.src,\n\t\t}\n\t\tcache.put(data.handle, t)\n\t}\n\ttex = t.(*texture)\n\tif tex.tex != nil {\n\t\treturn tex.tex\n\t}\n\thandle, err := r.ctx.NewTexture(driver.TextureFormatSRGBA, data.src.Bounds().Dx(), data.src.Bounds().Dy(), driver.FilterLinear, driver.FilterLinear, driver.BufferBindingTexture)\n\tif err != nil {\n\t\tpanic(err)\n\t}\n\tdriver.UploadImage(handle, image.Pt(0, 0), data.src)\n\ttex.tex = handle\n\treturn tex.tex\n}\n\nfunc (t *texture) release() {\n\tif t.tex != nil {\n\t\tt.tex.Release()\n\t}\n}\n\nfunc newRenderer(ctx driver.Device) *renderer {\n\tr := &renderer{\n\t\tctx: ctx,\n\t\tblitter: newBlitter(ctx),\n\t\tpather: newPather(ctx),\n\t}\n\n\tmaxDim := ctx.Caps().MaxTextureSize\n\t// Large atlas textures cause artifacts due to precision loss in\n\t// shaders.\n\tif cap := 8192; maxDim > cap {\n\t\tmaxDim = cap\n\t}\n\n\tr.packer.maxDims = image.Pt(maxDim, maxDim)\n\tr.intersections.maxDims = image.Pt(maxDim, maxDim)\n\treturn r\n}\n\nfunc (r *renderer) release() {\n\tr.pather.release()\n\tr.blitter.release()\n}\n\nfunc newBlitter(ctx driver.Device) *blitter {\n\tquadVerts, err := ctx.NewImmutableBuffer(driver.BufferBindingVertices,\n\t\tbyteslice.Slice([]float32{\n\t\t\t-1, -1, 0, 0,\n\t\t\t+1, -1, 1, 0,\n\t\t\t-1, +1, 0, 1,\n\t\t\t+1, +1, 1, 1,\n\t\t}),\n\t)\n\tif err != nil {\n\t\tpanic(err)\n\t}\n\tb := &blitter{\n\t\tctx: ctx,\n\t\tquadVerts: quadVerts,\n\t}\n\tb.colUniforms = new(blitColUniforms)\n\tb.texUniforms = new(blitTexUniforms)\n\tb.linearGradientUniforms = new(blitLinearGradientUniforms)\n\tpipelines, err := createColorPrograms(ctx, gio.Shader_blit_vert, gio.Shader_blit_frag,\n\t\t[3]interface{}{b.colUniforms, b.linearGradientUniforms, b.texUniforms},\n\t)\n\tif err != nil {\n\t\tpanic(err)\n\t}\n\tb.pipelines = pipelines\n\treturn b\n}\n\nfunc (b *blitter) release() {\n\tb.quadVerts.Release()\n\tfor _, p := range b.pipelines {\n\t\tp.Release()\n\t}\n}\n\nfunc createColorPrograms(b driver.Device, vsSrc shader.Sources, fsSrc [3]shader.Sources, uniforms [3]interface{}) ([3]*pipeline, error) {\n\tvar pipelines [3]*pipeline\n\tblend := driver.BlendDesc{\n\t\tEnable: true,\n\t\tSrcFactor: driver.BlendFactorOne,\n\t\tDstFactor: driver.BlendFactorOneMinusSrcAlpha,\n\t}\n\tlayout := driver.VertexLayout{\n\t\tInputs: []driver.InputDesc{\n\t\t\t{Type: shader.DataTypeFloat, Size: 2, Offset: 0},\n\t\t\t{Type: shader.DataTypeFloat, Size: 2, Offset: 4 * 2},\n\t\t},\n\t\tStride: 4 * 4,\n\t}\n\tvsh, err := b.NewVertexShader(vsSrc)\n\tif err != nil {\n\t\treturn pipelines, err\n\t}\n\tdefer vsh.Release()\n\t{\n\t\tfsh, err := b.NewFragmentShader(fsSrc[materialTexture])\n\t\tif err != nil {\n\t\t\treturn pipelines, err\n\t\t}\n\t\tdefer fsh.Release()\n\t\tpipe, err := b.NewPipeline(driver.PipelineDesc{\n\t\t\tVertexShader: vsh,\n\t\t\tFragmentShader: fsh,\n\t\t\tBlendDesc: blend,\n\t\t\tVertexLayout: layout,\n\t\t\tPixelFormat: driver.TextureFormatOutput,\n\t\t\tTopology: driver.TopologyTriangleStrip,\n\t\t})\n\t\tif err != nil {\n\t\t\treturn pipelines, err\n\t\t}\n\t\tvar vertBuffer *uniformBuffer\n\t\tif u := uniforms[materialTexture]; u != nil {\n\t\t\tvertBuffer = newUniformBuffer(b, u)\n\t\t}\n\t\tpipelines[materialTexture] = &pipeline{pipe, vertBuffer}\n\t}\n\t{\n\t\tvar vertBuffer *uniformBuffer\n\t\tfsh, err := b.NewFragmentShader(fsSrc[materialColor])\n\t\tif err != nil {\n\t\t\tpipelines[materialTexture].Release()\n\t\t\treturn pipelines, err\n\t\t}\n\t\tdefer fsh.Release()\n\t\tpipe, err := b.NewPipeline(driver.PipelineDesc{\n\t\t\tVertexShader: vsh,\n\t\t\tFragmentShader: fsh,\n\t\t\tBlendDesc: blend,\n\t\t\tVertexLayout: layout,\n\t\t\tPixelFormat: driver.TextureFormatOutput,\n\t\t\tTopology: driver.TopologyTriangleStrip,\n\t\t})\n\t\tif err != nil {\n\t\t\tpipelines[materialTexture].Release()\n\t\t\treturn pipelines, err\n\t\t}\n\t\tif u := uniforms[materialColor]; u != nil {\n\t\t\tvertBuffer = newUniformBuffer(b, u)\n\t\t}\n\t\tpipelines[materialColor] = &pipeline{pipe, vertBuffer}\n\t}\n\t{\n\t\tvar vertBuffer *uniformBuffer\n\t\tfsh, err := b.NewFragmentShader(fsSrc[materialLinearGradient])\n\t\tif err != nil {\n\t\t\tpipelines[materialTexture].Release()\n\t\t\tpipelines[materialColor].Release()\n\t\t\treturn pipelines, err\n\t\t}\n\t\tdefer fsh.Release()\n\t\tpipe, err := b.NewPipeline(driver.PipelineDesc{\n\t\t\tVertexShader: vsh,\n\t\t\tFragmentShader: fsh,\n\t\t\tBlendDesc: blend,\n\t\t\tVertexLayout: layout,\n\t\t\tPixelFormat: driver.TextureFormatOutput,\n\t\t\tTopology: driver.TopologyTriangleStrip,\n\t\t})\n\t\tif err != nil {\n\t\t\tpipelines[materialTexture].Release()\n\t\t\tpipelines[materialColor].Release()\n\t\t\treturn pipelines, err\n\t\t}\n\t\tif u := uniforms[materialLinearGradient]; u != nil {\n\t\t\tvertBuffer = newUniformBuffer(b, u)\n\t\t}\n\t\tpipelines[materialLinearGradient] = &pipeline{pipe, vertBuffer}\n\t}\n\tif err != nil {\n\t\tfor _, p := range pipelines {\n\t\t\tp.Release()\n\t\t}\n\t\treturn pipelines, err\n\t}\n\treturn pipelines, nil\n}\n\nfunc (r *renderer) stencilClips(pathCache *opCache, ops []*pathOp) {\n\tif len(r.packer.sizes) == 0 {\n\t\treturn\n\t}\n\tfbo := -1\n\tr.pather.begin(r.packer.sizes)\n\tfor _, p := range ops {\n\t\tif fbo != p.place.Idx {\n\t\t\tif fbo != -1 {\n\t\t\t\tr.ctx.EndRenderPass()\n\t\t\t}\n\t\t\tfbo = p.place.Idx\n\t\t\tf := r.pather.stenciler.cover(fbo)\n\t\t\tr.ctx.BeginRenderPass(f.tex, driver.LoadDesc{Action: driver.LoadActionClear})\n\t\t\tr.ctx.BindPipeline(r.pather.stenciler.pipeline.pipeline.pipeline)\n\t\t\tr.ctx.BindIndexBuffer(r.pather.stenciler.indexBuf)\n\t\t}\n\t\tv, _ := pathCache.get(p.pathKey)\n\t\tr.pather.stencilPath(p.clip, p.off, p.place.Pos, v.data)\n\t}\n\tif fbo != -1 {\n\t\tr.ctx.EndRenderPass()\n\t}\n}\n\nfunc (r *renderer) prepareIntersections(ops []imageOp) {\n\tfor _, img := range ops {\n\t\tif img.clipType != clipTypeIntersection {\n\t\t\tcontinue\n\t\t}\n\t\tfbo := r.pather.stenciler.cover(img.path.place.Idx)\n\t\tr.ctx.PrepareTexture(fbo.tex)\n\t}\n}\n\nfunc (r *renderer) intersect(ops []imageOp) {\n\tif len(r.intersections.sizes) == 0 {\n\t\treturn\n\t}\n\tfbo := -1\n\tr.pather.stenciler.beginIntersect(r.intersections.sizes)\n\tfor _, img := range ops {\n\t\tif img.clipType != clipTypeIntersection {\n\t\t\tcontinue\n\t\t}\n\t\tif fbo != img.place.Idx {\n\t\t\tif fbo != -1 {\n\t\t\t\tr.ctx.EndRenderPass()\n\t\t\t}\n\t\t\tfbo = img.place.Idx\n\t\t\tf := r.pather.stenciler.intersections.fbos[fbo]\n\t\t\td := driver.LoadDesc{Action: driver.LoadActionClear}\n\t\t\td.ClearColor.R = 1.0\n\t\t\tr.ctx.BeginRenderPass(f.tex, d)\n\t\t\tr.ctx.BindPipeline(r.pather.stenciler.ipipeline.pipeline.pipeline)\n\t\t\tr.ctx.BindVertexBuffer(r.blitter.quadVerts, 0)\n\t\t}\n\t\tr.ctx.Viewport(img.place.Pos.X, img.place.Pos.Y, img.clip.Dx(), img.clip.Dy())\n\t\tr.intersectPath(img.path, img.clip)\n\t}\n\tif fbo != -1 {\n\t\tr.ctx.EndRenderPass()\n\t}\n}\n\nfunc (r *renderer) intersectPath(p *pathOp, clip image.Rectangle) {\n\tif p.parent != nil {\n\t\tr.intersectPath(p.parent, clip)\n\t}\n\tif !p.path {\n\t\treturn\n\t}\n\tuv := image.Rectangle{\n\t\tMin: p.place.Pos,\n\t\tMax: p.place.Pos.Add(p.clip.Size()),\n\t}\n\to := clip.Min.Sub(p.clip.Min)\n\tsub := image.Rectangle{\n\t\tMin: o,\n\t\tMax: o.Add(clip.Size()),\n\t}\n\tfbo := r.pather.stenciler.cover(p.place.Idx)\n\tr.ctx.BindTexture(0, fbo.tex)\n\tcoverScale, coverOff := texSpaceTransform(layout.FRect(uv), fbo.size)\n\tsubScale, subOff := texSpaceTransform(layout.FRect(sub), p.clip.Size())\n\tr.pather.stenciler.ipipeline.uniforms.vert.uvTransform = [4]float32{coverScale.X, coverScale.Y, coverOff.X, coverOff.Y}\n\tr.pather.stenciler.ipipeline.uniforms.vert.subUVTransform = [4]float32{subScale.X, subScale.Y, subOff.X, subOff.Y}\n\tr.pather.stenciler.ipipeline.pipeline.UploadUniforms(r.ctx)\n\tr.ctx.DrawArrays(0, 4)\n}\n\nfunc (r *renderer) packIntersections(ops []imageOp) {\n\tr.intersections.clear()\n\tfor i, img := range ops {\n\t\tvar npaths int\n\t\tvar onePath *pathOp\n\t\tfor p := img.path; p != nil; p = p.parent {\n\t\t\tif p.path {\n\t\t\t\tonePath = p\n\t\t\t\tnpaths++\n\t\t\t}\n\t\t}\n\t\tswitch npaths {\n\t\tcase 0:\n\t\tcase 1:\n\t\t\tplace := onePath.place\n\t\t\tplace.Pos = place.Pos.Sub(onePath.clip.Min).Add(img.clip.Min)\n\t\t\tops[i].place = place\n\t\t\tops[i].clipType = clipTypePath\n\t\tdefault:\n\t\t\tsz := image.Point{X: img.clip.Dx(), Y: img.clip.Dy()}\n\t\t\tplace, ok := r.intersections.add(sz)\n\t\t\tif !ok {\n\t\t\t\tpanic(\"internal error: if the intersection fit, the intersection should fit as well\")\n\t\t\t}\n\t\t\tops[i].clipType = clipTypeIntersection\n\t\t\tops[i].place = place\n\t\t}\n\t}\n}\n\nfunc (r *renderer) packStencils(pops *[]*pathOp) {\n\tr.packer.clear()\n\tops := *pops\n\t// Allocate atlas space for cover textures.\n\tvar i int\n\tfor i < len(ops) {\n\t\tp := ops[i]\n\t\tif p.clip.Empty() {\n\t\t\tops[i] = ops[len(ops)-1]\n\t\t\tops = ops[:len(ops)-1]\n\t\t\tcontinue\n\t\t}\n\t\tsz := image.Point{X: p.clip.Dx(), Y: p.clip.Dy()}\n\t\tplace, ok := r.packer.add(sz)\n\t\tif !ok {\n\t\t\t// The clip area is at most the entire screen. Hopefully no\n\t\t\t// screen is larger than GL_MAX_TEXTURE_SIZE.\n\t\t\tpanic(fmt.Errorf(\"clip area %v is larger than maximum texture size %v\", p.clip, r.packer.maxDims))\n\t\t}\n\t\tp.place = place\n\t\ti++\n\t}\n\t*pops = ops\n}\n\n// boundRectF returns a bounding image.Rectangle for a f32.Rectangle.\nfunc boundRectF(r f32.Rectangle) image.Rectangle {\n\treturn image.Rectangle{\n\t\tMin: image.Point{\n\t\t\tX: int(floor(r.Min.X)),\n\t\t\tY: int(floor(r.Min.Y)),\n\t\t},\n\t\tMax: image.Point{\n\t\t\tX: int(ceil(r.Max.X)),\n\t\t\tY: int(ceil(r.Max.Y)),\n\t\t},\n\t}\n}\n\nfunc ceil(v float32) int {\n\treturn int(math.Ceil(float64(v)))\n}\n\nfunc floor(v float32) int {\n\treturn int(math.Floor(float64(v)))\n}\n\nfunc (d *drawOps) reset(viewport image.Point) {\n\td.profile = false\n\td.viewport = viewport\n\td.imageOps = d.imageOps[:0]\n\td.pathOps = d.pathOps[:0]\n\td.pathOpCache = d.pathOpCache[:0]\n\td.vertCache = d.vertCache[:0]\n\td.transStack = d.transStack[:0]\n}\n\nfunc (d *drawOps) collect(root *op.Ops, viewport image.Point) {\n\tviewf := f32.Rectangle{\n\t\tMax: f32.Point{X: float32(viewport.X), Y: float32(viewport.Y)},\n\t}\n\tvar ops *ops.Ops\n\tif root != nil {\n\t\tops = &root.Internal\n\t}\n\td.reader.Reset(ops)\n\td.collectOps(&d.reader, viewf)\n}\n\nfunc (d *drawOps) buildPaths(ctx driver.Device) {\n\tfor _, p := range d.pathOps {\n\t\tif v, exists := d.pathCache.get(p.pathKey); !exists || v.data.data == nil {\n\t\t\tdata := buildPath(ctx, p.pathVerts)\n\t\t\td.pathCache.put(p.pathKey, opCacheValue{\n\t\t\t\tdata: data,\n\t\t\t\tbounds: p.bounds,\n\t\t\t})\n\t\t}\n\t\tp.pathVerts = nil\n\t}\n}\n\nfunc (d *drawOps) newPathOp() *pathOp {\n\td.pathOpCache = append(d.pathOpCache, pathOp{})\n\treturn &d.pathOpCache[len(d.pathOpCache)-1]\n}\n\nfunc (d *drawOps) addClipPath(state *drawState, aux []byte, auxKey opKey, bounds f32.Rectangle, off f32.Point, push bool) {\n\tnpath := d.newPathOp()\n\t*npath = pathOp{\n\t\tparent: state.cpath,\n\t\tbounds: bounds,\n\t\toff: off,\n\t\tintersect: bounds.Add(off),\n\t\trect: true,\n\t}\n\tif npath.parent != nil {\n\t\tnpath.rect = npath.parent.rect\n\t\tnpath.intersect = npath.parent.intersect.Intersect(npath.intersect)\n\t}\n\tif len(aux) > 0 {\n\t\tnpath.rect = false\n\t\tnpath.pathKey = auxKey\n\t\tnpath.path = true\n\t\tnpath.pathVerts = aux\n\t\td.pathOps = append(d.pathOps, npath)\n\t}\n\tstate.cpath = npath\n}\n\n// split a transform into two parts, one which is pure offset and the\n// other representing the scaling, shearing and rotation part\nfunc splitTransform(t f32.Affine2D) (srs f32.Affine2D, offset f32.Point) {\n\tsx, hx, ox, hy, sy, oy := t.Elems()\n\toffset = f32.Point{X: ox, Y: oy}\n\tsrs = f32.NewAffine2D(sx, hx, 0, hy, sy, 0)\n\treturn\n}\n\nfunc (d *drawOps) save(id int, state f32.Affine2D) {\n\tif extra := id - len(d.states) + 1; extra > 0 {\n\t\td.states = append(d.states, make([]f32.Affine2D, extra)...)\n\t}\n\td.states[id] = state\n}\n\nfunc (k opKey) SetTransform(t f32.Affine2D) opKey {\n\tsx, hx, _, hy, sy, _ := t.Elems()\n\tk.sx = sx\n\tk.hx = hx\n\tk.hy = hy\n\tk.sy = sy\n\treturn k\n}\n\nfunc (d *drawOps) collectOps(r *ops.Reader, viewport f32.Rectangle) {\n\tvar (\n\t\tquads quadsOp\n\t\tstate drawState\n\t)\n\treset := func() {\n\t\tstate = drawState{\n\t\t\tcolor: color.NRGBA{A: 0xff},\n\t\t}\n\t}\n\treset()\nloop:\n\tfor encOp, ok := r.Decode(); ok; encOp, ok = r.Decode() {\n\t\tswitch ops.OpType(encOp.Data[0]) {\n\t\tcase ops.TypeProfile:\n\t\t\td.profile = true\n\t\tcase ops.TypeTransform:\n\t\t\tdop, push := ops.DecodeTransform(encOp.Data)\n\t\t\tif push {\n\t\t\t\td.transStack = append(d.transStack, state.t)\n\t\t\t}\n\t\t\tstate.t = state.t.Mul(dop)\n\t\tcase ops.TypePopTransform:\n\t\t\tn := len(d.transStack)\n\t\t\tstate.t = d.transStack[n-1]\n\t\t\td.transStack = d.transStack[:n-1]\n\n\t\tcase ops.TypeStroke:\n\t\t\tquads.key.strokeWidth = decodeStrokeOp(encOp.Data)\n\n\t\tcase ops.TypePath:\n\t\t\tencOp, ok = r.Decode()\n\t\t\tif !ok {\n\t\t\t\tbreak loop\n\t\t\t}\n\t\t\tquads.aux = encOp.Data[ops.TypeAuxLen:]\n\t\t\tquads.key.Key = encOp.Key\n\n\t\tcase ops.TypeClip:\n\t\t\tvar op ops.ClipOp\n\t\t\top.Decode(encOp.Data)\n\t\t\tquads.key.outline = op.Outline\n\t\t\tbounds := layout.FRect(op.Bounds)\n\t\t\ttrans, off := splitTransform(state.t)\n\t\t\tif len(quads.aux) > 0 {\n\t\t\t\t// There is a clipping path, build the gpu data and update the\n\t\t\t\t// cache key such that it will be equal only if the transform is the\n\t\t\t\t// same also. Use cached data if we have it.\n\t\t\t\tquads.key = quads.key.SetTransform(trans)\n\t\t\t\tif v, ok := d.pathCache.get(quads.key); ok {\n\t\t\t\t\t// Since the GPU data exists in the cache aux will not be used.\n\t\t\t\t\t// Why is this not used for the offset shapes?\n\t\t\t\t\tbounds = v.bounds\n\t\t\t\t} else {\n\t\t\t\t\tvar pathData []byte\n\t\t\t\t\tpathData, bounds = d.buildVerts(\n\t\t\t\t\t\tquads.aux, trans, quads.key.outline, quads.key.strokeWidth,\n\t\t\t\t\t)\n\t\t\t\t\tquads.aux = pathData\n\t\t\t\t\t// add it to the cache, without GPU data, so the transform can be\n\t\t\t\t\t// reused.\n\t\t\t\t\td.pathCache.put(quads.key, opCacheValue{bounds: bounds})\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tquads.aux, bounds, _ = d.boundsForTransformedRect(bounds, trans)\n\t\t\t\tquads.key = opKey{Key: encOp.Key}\n\t\t\t}\n\t\t\td.addClipPath(&state, quads.aux, quads.key, bounds, off, true)\n\t\t\tquads = quadsOp{}\n\t\tcase ops.TypePopClip:\n\t\t\tstate.cpath = state.cpath.parent\n\n\t\tcase ops.TypeColor:\n\t\t\tstate.matType = materialColor\n\t\t\tstate.color = decodeColorOp(encOp.Data)\n\t\tcase ops.TypeLinearGradient:\n\t\t\tstate.matType = materialLinearGradient\n\t\t\top := decodeLinearGradientOp(encOp.Data)\n\t\t\tstate.stop1 = op.stop1\n\t\t\tstate.stop2 = op.stop2\n\t\t\tstate.color1 = op.color1\n\t\t\tstate.color2 = op.color2\n\t\tcase ops.TypeImage:\n\t\t\tstate.matType = materialTexture\n\t\t\tstate.image = decodeImageOp(encOp.Data, encOp.Refs)\n\t\tcase ops.TypePaint:\n\t\t\t// Transform (if needed) the painting rectangle and if so generate a clip path,\n\t\t\t// for those cases also compute a partialTrans that maps texture coordinates between\n\t\t\t// the new bounding rectangle and the transformed original paint rectangle.\n\t\t\tt, off := splitTransform(state.t)\n\t\t\t// Fill the clip area, unless the material is a (bounded) image.\n\t\t\t// TODO: Find a tighter bound.\n\t\t\tinf := float32(1e6)\n\t\t\tdst := f32.Rect(-inf, -inf, inf, inf)\n\t\t\tif state.matType == materialTexture {\n\t\t\t\tsz := state.image.src.Rect.Size()\n\t\t\t\tdst = f32.Rectangle{Max: layout.FPt(sz)}\n\t\t\t}\n\t\t\tclipData, bnd, partialTrans := d.boundsForTransformedRect(dst, t)\n\t\t\tcl := viewport.Intersect(bnd.Add(off))\n\t\t\tif state.cpath != nil {\n\t\t\t\tcl = state.cpath.intersect.Intersect(cl)\n\t\t\t}\n\t\t\tif cl.Empty() {\n\t\t\t\tcontinue\n\t\t\t}\n\n\t\t\tif clipData != nil {\n\t\t\t\t// The paint operation is sheared or rotated, add a clip path representing\n\t\t\t\t// this transformed rectangle.\n\t\t\t\tk := opKey{Key: encOp.Key}\n\t\t\t\tk.SetTransform(t) // TODO: This call has no effect.\n\t\t\t\td.addClipPath(&state, clipData, k, bnd, off, false)\n\t\t\t}\n\n\t\t\tbounds := boundRectF(cl)\n\t\t\tmat := state.materialFor(bnd, off, partialTrans, bounds)\n\n\t\t\trect := state.cpath == nil || state.cpath.rect\n\t\t\tif bounds.Min == (image.Point{}) && bounds.Max == d.viewport && rect && mat.opaque && (mat.material == materialColor) {\n\t\t\t\t// The image is a uniform opaque color and takes up the whole screen.\n\t\t\t\t// Scrap images up to and including this image and set clear color.\n\t\t\t\td.imageOps = d.imageOps[:0]\n\t\t\t\td.clearColor = mat.color.Opaque()\n\t\t\t\td.clear = true\n\t\t\t\tcontinue\n\t\t\t}\n\t\t\timg := imageOp{\n\t\t\t\tpath: state.cpath,\n\t\t\t\tclip: bounds,\n\t\t\t\tmaterial: mat,\n\t\t\t}\n\n\t\t\td.imageOps = append(d.imageOps, img)\n\t\t\tif clipData != nil {\n\t\t\t\t// we added a clip path that should not remain\n\t\t\t\tstate.cpath = state.cpath.parent\n\t\t\t}\n\t\tcase ops.TypeSave:\n\t\t\tid := ops.DecodeSave(encOp.Data)\n\t\t\td.save(id, state.t)\n\t\tcase ops.TypeLoad:\n\t\t\treset()\n\t\t\tid := ops.DecodeLoad(encOp.Data)\n\t\t\tstate.t = d.states[id]\n\t\t}\n\t}\n}\n\nfunc expandPathOp(p *pathOp, clip image.Rectangle) {\n\tfor p != nil {\n\t\tpclip := p.clip\n\t\tif !pclip.Empty() {\n\t\t\tclip = clip.Union(pclip)\n\t\t}\n\t\tp.clip = clip\n\t\tp = p.parent\n\t}\n}\n\nfunc (d *drawState) materialFor(rect f32.Rectangle, off f32.Point, partTrans f32.Affine2D, clip image.Rectangle) material {\n\tvar m material\n\tswitch d.matType {\n\tcase materialColor:\n\t\tm.material = materialColor\n\t\tm.color = f32color.LinearFromSRGB(d.color)\n\t\tm.opaque = m.color.A == 1.0\n\tcase materialLinearGradient:\n\t\tm.material = materialLinearGradient\n\n\t\tm.color1 = f32color.LinearFromSRGB(d.color1)\n\t\tm.color2 = f32color.LinearFromSRGB(d.color2)\n\t\tm.opaque = m.color1.A == 1.0 && m.color2.A == 1.0\n\n\t\tm.uvTrans = partTrans.Mul(gradientSpaceTransform(clip, off, d.stop1, d.stop2))\n\tcase materialTexture:\n\t\tm.material = materialTexture\n\t\tdr := boundRectF(rect.Add(off))\n\t\tsz := d.image.src.Bounds().Size()\n\t\tsr := f32.Rectangle{\n\t\t\tMax: f32.Point{\n\t\t\t\tX: float32(sz.X),\n\t\t\t\tY: float32(sz.Y),\n\t\t\t},\n\t\t}\n\t\tdx := float32(dr.Dx())\n\t\tsdx := sr.Dx()\n\t\tsr.Min.X += float32(clip.Min.X-dr.Min.X) * sdx / dx\n\t\tsr.Max.X -= float32(dr.Max.X-clip.Max.X) * sdx / dx\n\t\tdy := float32(dr.Dy())\n\t\tsdy := sr.Dy()\n\t\tsr.Min.Y += float32(clip.Min.Y-dr.Min.Y) * sdy / dy\n\t\tsr.Max.Y -= float32(dr.Max.Y-clip.Max.Y) * sdy / dy\n\t\tuvScale, uvOffset := texSpaceTransform(sr, sz)\n\t\tm.uvTrans = partTrans.Mul(f32.Affine2D{}.Scale(f32.Point{}, uvScale).Offset(uvOffset))\n\t\tm.data = d.image\n\t}\n\treturn m\n}\n\nfunc (r *renderer) uploadImages(cache *resourceCache, ops []imageOp) {\n\tfor _, img := range ops {\n\t\tm := img.material\n\t\tif m.material == materialTexture {\n\t\t\tr.texHandle(cache, m.data)\n\t\t}\n\t}\n}\n\nfunc (r *renderer) prepareDrawOps(cache *resourceCache, ops []imageOp) {\n\tfor _, img := range ops {\n\t\tm := img.material\n\t\tswitch m.material {\n\t\tcase materialTexture:\n\t\t\tr.ctx.PrepareTexture(r.texHandle(cache, m.data))\n\t\t}\n\n\t\tvar fbo stencilFBO\n\t\tswitch img.clipType {\n\t\tcase clipTypeNone:\n\t\t\tcontinue\n\t\tcase clipTypePath:\n\t\t\tfbo = r.pather.stenciler.cover(img.place.Idx)\n\t\tcase clipTypeIntersection:\n\t\t\tfbo = r.pather.stenciler.intersections.fbos[img.place.Idx]\n\t\t}\n\t\tr.ctx.PrepareTexture(fbo.tex)\n\t}\n}\n\nfunc (r *renderer) drawOps(cache *resourceCache, ops []imageOp) {\n\tvar coverTex driver.Texture\n\tfor _, img := range ops {\n\t\tm := img.material\n\t\tswitch m.material {\n\t\tcase materialTexture:\n\t\t\tr.ctx.BindTexture(0, r.texHandle(cache, m.data))\n\t\t}\n\t\tdrc := img.clip\n\n\t\tscale, off := clipSpaceTransform(drc, r.blitter.viewport)\n\t\tvar fbo stencilFBO\n\t\tswitch img.clipType {\n\t\tcase clipTypeNone:\n\t\t\tp := r.blitter.pipelines[m.material]\n\t\t\tr.ctx.BindPipeline(p.pipeline)\n\t\t\tr.ctx.BindVertexBuffer(r.blitter.quadVerts, 0)\n\t\t\tr.blitter.blit(m.material, m.color, m.color1, m.color2, scale, off, m.uvTrans)\n\t\t\tcontinue\n\t\tcase clipTypePath:\n\t\t\tfbo = r.pather.stenciler.cover(img.place.Idx)\n\t\tcase clipTypeIntersection:\n\t\t\tfbo = r.pather.stenciler.intersections.fbos[img.place.Idx]\n\t\t}\n\t\tif coverTex != fbo.tex {\n\t\t\tcoverTex = fbo.tex\n\t\t\tr.ctx.BindTexture(1, coverTex)\n\t\t}\n\t\tuv := image.Rectangle{\n\t\t\tMin: img.place.Pos,\n\t\t\tMax: img.place.Pos.Add(drc.Size()),\n\t\t}\n\t\tcoverScale, coverOff := texSpaceTransform(layout.FRect(uv), fbo.size)\n\t\tp := r.pather.coverer.pipelines[m.material]\n\t\tr.ctx.BindPipeline(p.pipeline)\n\t\tr.ctx.BindVertexBuffer(r.blitter.quadVerts, 0)\n\t\tr.pather.cover(m.material, m.color, m.color1, m.color2, scale, off, m.uvTrans, coverScale, coverOff)\n\t}\n}\n\nfunc (b *blitter) blit(mat materialType, col f32color.RGBA, col1, col2 f32color.RGBA, scale, off f32.Point, uvTrans f32.Affine2D) {\n\tp := b.pipelines[mat]\n\tb.ctx.BindPipeline(p.pipeline)\n\tvar uniforms *blitUniforms\n\tswitch mat {\n\tcase materialColor:\n\t\tb.colUniforms.color = col\n\t\tuniforms = &b.colUniforms.blitUniforms\n\tcase materialTexture:\n\t\tt1, t2, t3, t4, t5, t6 := uvTrans.Elems()\n\t\tb.texUniforms.blitUniforms.uvTransformR1 = [4]float32{t1, t2, t3, 0}\n\t\tb.texUniforms.blitUniforms.uvTransformR2 = [4]float32{t4, t5, t6, 0}\n\t\tuniforms = &b.texUniforms.blitUniforms\n\tcase materialLinearGradient:\n\t\tb.linearGradientUniforms.color1 = col1\n\t\tb.linearGradientUniforms.color2 = col2\n\n\t\tt1, t2, t3, t4, t5, t6 := uvTrans.Elems()\n\t\tb.linearGradientUniforms.blitUniforms.uvTransformR1 = [4]float32{t1, t2, t3, 0}\n\t\tb.linearGradientUniforms.blitUniforms.uvTransformR2 = [4]float32{t4, t5, t6, 0}\n\t\tuniforms = &b.linearGradientUniforms.blitUniforms\n\t}\n\tuniforms.transform = [4]float32{scale.X, scale.Y, off.X, off.Y}\n\tp.UploadUniforms(b.ctx)\n\tb.ctx.DrawArrays(0, 4)\n}\n\n// newUniformBuffer creates a new GPU uniform buffer backed by the\n// structure uniformBlock points to.\nfunc newUniformBuffer(b driver.Device, uniformBlock interface{}) *uniformBuffer {\n\tref := reflect.ValueOf(uniformBlock)\n\t// Determine the size of the uniforms structure, *uniforms.\n\tsize := ref.Elem().Type().Size()\n\t// Map the uniforms structure as a byte slice.\n\tptr := (*[1 << 30]byte)(unsafe.Pointer(ref.Pointer()))[:size:size]\n\tubuf, err := b.NewBuffer(driver.BufferBindingUniforms, len(ptr))\n\tif err != nil {\n\t\tpanic(err)\n\t}\n\treturn &uniformBuffer{buf: ubuf, ptr: ptr}\n}\n\nfunc (u *uniformBuffer) Upload() {\n\tu.buf.Upload(u.ptr)\n}\n\nfunc (u *uniformBuffer) Release() {\n\tu.buf.Release()\n\tu.buf = nil\n}\n\nfunc (p *pipeline) UploadUniforms(ctx driver.Device) {\n\tif p.uniforms != nil {\n\t\tp.uniforms.Upload()\n\t\tctx.BindUniforms(p.uniforms.buf)\n\t}\n}\n\nfunc (p *pipeline) Release() {\n\tp.pipeline.Release()\n\tif p.uniforms != nil {\n\t\tp.uniforms.Release()\n\t}\n\t*p = pipeline{}\n}\n\n// texSpaceTransform return the scale and offset that transforms the given subimage\n// into quad texture coordinates.\nfunc texSpaceTransform(r f32.Rectangle, bounds image.Point) (f32.Point, f32.Point) {\n\tsize := f32.Point{X: float32(bounds.X), Y: float32(bounds.Y)}\n\tscale := f32.Point{X: r.Dx() / size.X, Y: r.Dy() / size.Y}\n\toffset := f32.Point{X: r.Min.X / size.X, Y: r.Min.Y / size.Y}\n\treturn scale, offset\n}\n\n// gradientSpaceTransform transforms stop1 and stop2 to [(0,0), (1,1)].\nfunc gradientSpaceTransform(clip image.Rectangle, off f32.Point, stop1, stop2 f32.Point) f32.Affine2D {\n\td := stop2.Sub(stop1)\n\tl := float32(math.Sqrt(float64(d.X*d.X + d.Y*d.Y)))\n\ta := float32(math.Atan2(float64(-d.Y), float64(d.X)))\n\n\t// TODO: optimize\n\tzp := f32.Point{}\n\treturn f32.Affine2D{}.\n\t\tScale(zp, layout.FPt(clip.Size())). // scale to pixel space\n\t\tOffset(zp.Sub(off).Add(layout.FPt(clip.Min))). // offset to clip space\n\t\tOffset(zp.Sub(stop1)). // offset to first stop point\n\t\tRotate(zp, a). // rotate to align gradient\n\t\tScale(zp, f32.Pt(1/l, 1/l)) // scale gradient to right size\n}\n\n// clipSpaceTransform returns the scale and offset that transforms the given\n// rectangle from a viewport into GPU driver device coordinates.\nfunc clipSpaceTransform(r image.Rectangle, viewport image.Point) (f32.Point, f32.Point) {\n\t// First, transform UI coordinates to device coordinates:\n\t//\n\t//\t[(-1, -1) (+1, -1)]\n\t//\t[(-1, +1) (+1, +1)]\n\t//\n\tx, y := float32(r.Min.X), float32(r.Min.Y)\n\tw, h := float32(r.Dx()), float32(r.Dy())\n\tvx, vy := 2/float32(viewport.X), 2/float32(viewport.Y)\n\tx = x*vx - 1\n\ty = y*vy - 1\n\tw *= vx\n\th *= vy\n\n\t// Then, compute the transformation from the fullscreen quad to\n\t// the rectangle at (x, y) and dimensions (w, h).\n\tscale := f32.Point{X: w * .5, Y: h * .5}\n\toffset := f32.Point{X: x + w*.5, Y: y + h*.5}\n\n\treturn scale, offset\n}\n\n// Fill in maximal Y coordinates of the NW and NE corners.\nfunc fillMaxY(verts []byte) {\n\tcontour := 0\n\tbo := binary.LittleEndian\n\tfor len(verts) > 0 {\n\t\tmaxy := float32(math.Inf(-1))\n\t\ti := 0\n\t\tfor ; i+vertStride*4 <= len(verts); i += vertStride * 4 {\n\t\t\tvert := verts[i : i+vertStride]\n\t\t\t// MaxY contains the integer contour index.\n\t\t\tpathContour := int(bo.Uint32(vert[int(unsafe.Offsetof(((*vertex)(nil)).MaxY)):]))\n\t\t\tif contour != pathContour {\n\t\t\t\tcontour = pathContour\n\t\t\t\tbreak\n\t\t\t}\n\t\t\tfromy := math.Float32frombits(bo.Uint32(vert[int(unsafe.Offsetof(((*vertex)(nil)).FromY)):]))\n\t\t\tctrly := math.Float32frombits(bo.Uint32(vert[int(unsafe.Offsetof(((*vertex)(nil)).CtrlY)):]))\n\t\t\ttoy := math.Float32frombits(bo.Uint32(vert[int(unsafe.Offsetof(((*vertex)(nil)).ToY)):]))\n\t\t\tif fromy > maxy {\n\t\t\t\tmaxy = fromy\n\t\t\t}\n\t\t\tif ctrly > maxy {\n\t\t\t\tmaxy = ctrly\n\t\t\t}\n\t\t\tif toy > maxy {\n\t\t\t\tmaxy = toy\n\t\t\t}\n\t\t}\n\t\tfillContourMaxY(maxy, verts[:i])\n\t\tverts = verts[i:]\n\t}\n}\n\nfunc fillContourMaxY(maxy float32, verts []byte) {\n\tbo := binary.LittleEndian\n\tfor i := 0; i < len(verts); i += vertStride {\n\t\toff := int(unsafe.Offsetof(((*vertex)(nil)).MaxY))\n\t\tbo.PutUint32(verts[i+off:], math.Float32bits(maxy))\n\t}\n}\n\nfunc (d *drawOps) writeVertCache(n int) []byte {\n\td.vertCache = append(d.vertCache, make([]byte, n)...)\n\treturn d.vertCache[len(d.vertCache)-n:]\n}\n\n// transform, split paths as needed, calculate maxY, bounds and create GPU vertices.\nfunc (d *drawOps) buildVerts(pathData []byte, tr f32.Affine2D, outline bool, strWidth float32) (verts []byte, bounds f32.Rectangle) {\n\tinf := float32(math.Inf(+1))\n\td.qs.bounds = f32.Rectangle{\n\t\tMin: f32.Point{X: inf, Y: inf},\n\t\tMax: f32.Point{X: -inf, Y: -inf},\n\t}\n\td.qs.d = d\n\tstartLength := len(d.vertCache)\n\n\tswitch {\n\tcase strWidth > 0:\n\t\t// Stroke path.\n\t\tss := stroke.StrokeStyle{\n\t\t\tWidth: strWidth,\n\t\t}\n\t\tquads := stroke.StrokePathCommands(ss, pathData)\n\t\tfor _, quad := range quads {\n\t\t\td.qs.contour = quad.Contour\n\t\t\tquad.Quad = quad.Quad.Transform(tr)\n\n\t\t\td.qs.splitAndEncode(quad.Quad)\n\t\t}\n\n\tcase outline:\n\t\tdecodeToOutlineQuads(&d.qs, tr, pathData)\n\t}\n\n\tfillMaxY(d.vertCache[startLength:])\n\treturn d.vertCache[startLength:], d.qs.bounds\n}\n\n// decodeOutlineQuads decodes scene commands, splits them into quadratic bÊziers\n// as needed and feeds them to the supplied splitter.\nfunc decodeToOutlineQuads(qs *quadSplitter, tr f32.Affine2D, pathData []byte) {\n\tfor len(pathData) >= scene.CommandSize+4 {\n\t\tqs.contour = bo.Uint32(pathData)\n\t\tcmd := ops.DecodeCommand(pathData[4:])\n\t\tswitch cmd.Op() {\n\t\tcase scene.OpLine:\n\t\t\tvar q stroke.QuadSegment\n\t\t\tq.From, q.To = scene.DecodeLine(cmd)\n\t\t\tq.Ctrl = q.From.Add(q.To).Mul(.5)\n\t\t\tq = q.Transform(tr)\n\t\t\tqs.splitAndEncode(q)\n\t\tcase scene.OpGap:\n\t\t\tvar q stroke.QuadSegment\n\t\t\tq.From, q.To = scene.DecodeGap(cmd)\n\t\t\tq.Ctrl = q.From.Add(q.To).Mul(.5)\n\t\t\tq = q.Transform(tr)\n\t\t\tqs.splitAndEncode(q)\n\t\tcase scene.OpQuad:\n\t\t\tvar q stroke.QuadSegment\n\t\t\tq.From, q.Ctrl, q.To = scene.DecodeQuad(cmd)\n\t\t\tq = q.Transform(tr)\n\t\t\tqs.splitAndEncode(q)\n\t\tcase scene.OpCubic:\n\t\t\tfor _, q := range stroke.SplitCubic(scene.DecodeCubic(cmd)) {\n\t\t\t\tq = q.Transform(tr)\n\t\t\t\tqs.splitAndEncode(q)\n\t\t\t}\n\t\tdefault:\n\t\t\tpanic(\"unsupported scene command\")\n\t\t}\n\t\tpathData = pathData[scene.CommandSize+4:]\n\t}\n}\n\n// create GPU vertices for transformed r, find the bounds and establish texture transform.\nfunc (d *drawOps) boundsForTransformedRect(r f32.Rectangle, tr f32.Affine2D) (aux []byte, bnd f32.Rectangle, ptr f32.Affine2D) {\n\tif isPureOffset(tr) {\n\t\t// fast-path to allow blitting of pure rectangles\n\t\t_, _, ox, _, _, oy := tr.Elems()\n\t\toff := f32.Pt(ox, oy)\n\t\tbnd.Min = r.Min.Add(off)\n\t\tbnd.Max = r.Max.Add(off)\n\t\treturn\n\t}\n\n\t// transform all corners, find new bounds\n\tcorners := [4]f32.Point{\n\t\ttr.Transform(r.Min), tr.Transform(f32.Pt(r.Max.X, r.Min.Y)),\n\t\ttr.Transform(r.Max), tr.Transform(f32.Pt(r.Min.X, r.Max.Y)),\n\t}\n\tbnd.Min = f32.Pt(math.MaxFloat32, math.MaxFloat32)\n\tbnd.Max = f32.Pt(-math.MaxFloat32, -math.MaxFloat32)\n\tfor _, c := range corners {\n\t\tif c.X < bnd.Min.X {\n\t\t\tbnd.Min.X = c.X\n\t\t}\n\t\tif c.Y < bnd.Min.Y {\n\t\t\tbnd.Min.Y = c.Y\n\t\t}\n\t\tif c.X > bnd.Max.X {\n\t\t\tbnd.Max.X = c.X\n\t\t}\n\t\tif c.Y > bnd.Max.Y {\n\t\t\tbnd.Max.Y = c.Y\n\t\t}\n\t}\n\n\t// build the GPU vertices\n\tl := len(d.vertCache)\n\td.vertCache = append(d.vertCache, make([]byte, vertStride*4*4)...)\n\taux = d.vertCache[l:]\n\tencodeQuadTo(aux, 0, corners[0], corners[0].Add(corners[1]).Mul(0.5), corners[1])\n\tencodeQuadTo(aux[vertStride*4:], 0, corners[1], corners[1].Add(corners[2]).Mul(0.5), corners[2])\n\tencodeQuadTo(aux[vertStride*4*2:], 0, corners[2], corners[2].Add(corners[3]).Mul(0.5), corners[3])\n\tencodeQuadTo(aux[vertStride*4*3:], 0, corners[3], corners[3].Add(corners[0]).Mul(0.5), corners[0])\n\tfillMaxY(aux)\n\n\t// establish the transform mapping from bounds rectangle to transformed corners\n\tvar P1, P2, P3 f32.Point\n\tP1.X = (corners[1].X - bnd.Min.X) / (bnd.Max.X - bnd.Min.X)\n\tP1.Y = (corners[1].Y - bnd.Min.Y) / (bnd.Max.Y - bnd.Min.Y)\n\tP2.X = (corners[2].X - bnd.Min.X) / (bnd.Max.X - bnd.Min.X)\n\tP2.Y = (corners[2].Y - bnd.Min.Y) / (bnd.Max.Y - bnd.Min.Y)\n\tP3.X = (corners[3].X - bnd.Min.X) / (bnd.Max.X - bnd.Min.X)\n\tP3.Y = (corners[3].Y - bnd.Min.Y) / (bnd.Max.Y - bnd.Min.Y)\n\tsx, sy := P2.X-P3.X, P2.Y-P3.Y\n\tptr = f32.NewAffine2D(sx, P2.X-P1.X, P1.X-sx, sy, P2.Y-P1.Y, P1.Y-sy).Invert()\n\n\treturn\n}\n\nfunc isPureOffset(t f32.Affine2D) bool {\n\ta, b, _, d, e, _ := t.Elems()\n\treturn a == 1 && b == 0 && d == 0 && e == 1\n}\n"
},
{
"path": "vendor/gioui.org/gpu/internal/d3d11/d3d11.go",
"content": "// SPDX-License-Identifier: Unlicense OR MIT\n\n// This file exists so this package builds on non-Windows platforms.\n\npackage d3d11\n"
},
{
"path": "vendor/gioui.org/gpu/internal/d3d11/d3d11_windows.go",
"content": "// SPDX-License-Identifier: Unlicense OR MIT\n\npackage d3d11\n\nimport (\n\t\"errors\"\n\t\"fmt\"\n\t\"image\"\n\t\"math\"\n\t\"reflect\"\n\t\"unsafe\"\n\n\t\"golang.org/x/sys/windows\"\n\n\t\"gioui.org/gpu/internal/driver\"\n\t\"gioui.org/internal/d3d11\"\n\t\"gioui.org/shader\"\n)\n\ntype Backend struct {\n\tdev *d3d11.Device\n\tctx *d3d11.DeviceContext\n\n\t// Temporary storage to avoid garbage.\n\tclearColor [4]float32\n\tviewport d3d11.VIEWPORT\n\n\tpipeline *Pipeline\n\tvert struct {\n\t\tbuffer *Buffer\n\t\toffset int\n\t}\n\n\tprogram *Program\n\n\tcaps driver.Caps\n\n\tfloatFormat uint32\n}\n\ntype Pipeline struct {\n\tvert *d3d11.VertexShader\n\tfrag *d3d11.PixelShader\n\tlayout *d3d11.InputLayout\n\tblend *d3d11.BlendState\n\tstride int\n\ttopology driver.Topology\n}\n\ntype Texture struct {\n\tbackend *Backend\n\tformat uint32\n\tbindings driver.BufferBinding\n\ttex *d3d11.Texture2D\n\tsampler *d3d11.SamplerState\n\tresView *d3d11.ShaderResourceView\n\tuaView *d3d11.UnorderedAccessView\n\trenderTarget *d3d11.RenderTargetView\n\n\twidth int\n\theight int\n\tforeign bool\n}\n\ntype VertexShader struct {\n\tbackend *Backend\n\tshader *d3d11.VertexShader\n\tsrc shader.Sources\n}\n\ntype FragmentShader struct {\n\tbackend *Backend\n\tshader *d3d11.PixelShader\n}\n\ntype Program struct {\n\tbackend *Backend\n\tshader *d3d11.ComputeShader\n}\n\ntype Buffer struct {\n\tbackend *Backend\n\tbind uint32\n\tbuf *d3d11.Buffer\n\tresView *d3d11.ShaderResourceView\n\tuaView *d3d11.UnorderedAccessView\n\tsize int\n\timmutable bool\n}\n\nfunc init() {\n\tdriver.NewDirect3D11Device = newDirect3D11Device\n}\n\nfunc detectFloatFormat(dev *d3d11.Device) (uint32, bool) {\n\tformats := []uint32{\n\t\td3d11.DXGI_FORMAT_R16_FLOAT,\n\t\td3d11.DXGI_FORMAT_R32_FLOAT,\n\t\td3d11.DXGI_FORMAT_R16G16_FLOAT,\n\t\td3d11.DXGI_FORMAT_R32G32_FLOAT,\n\t\t// These last two are really wasteful, but c'est la vie.\n\t\td3d11.DXGI_FORMAT_R16G16B16A16_FLOAT,\n\t\td3d11.DXGI_FORMAT_R32G32B32A32_FLOAT,\n\t}\n\tfor _, format := range formats {\n\t\tneed := uint32(d3d11.FORMAT_SUPPORT_TEXTURE2D | d3d11.FORMAT_SUPPORT_RENDER_TARGET)\n\t\tif support, _ := dev.CheckFormatSupport(format); support&need == need {\n\t\t\treturn format, true\n\t\t}\n\t}\n\treturn 0, false\n}\n\nfunc newDirect3D11Device(api driver.Direct3D11) (driver.Device, error) {\n\tdev := (*d3d11.Device)(api.Device)\n\tb := &Backend{\n\t\tdev: dev,\n\t\tctx: dev.GetImmediateContext(),\n\t\tcaps: driver.Caps{\n\t\t\tMaxTextureSize: 2048, // 9.1 maximum\n\t\t\tFeatures: driver.FeatureSRGB,\n\t\t},\n\t}\n\tfeatLvl := dev.GetFeatureLevel()\n\tswitch {\n\tcase featLvl < d3d11.FEATURE_LEVEL_9_1:\n\t\td3d11.IUnknownRelease(unsafe.Pointer(dev), dev.Vtbl.Release)\n\t\td3d11.IUnknownRelease(unsafe.Pointer(b.ctx), b.ctx.Vtbl.Release)\n\t\treturn nil, fmt.Errorf(\"d3d11: feature level too low: %d\", featLvl)\n\tcase featLvl >= d3d11.FEATURE_LEVEL_11_0:\n\t\tb.caps.MaxTextureSize = 16384\n\t\tb.caps.Features |= driver.FeatureCompute\n\tcase featLvl >= d3d11.FEATURE_LEVEL_9_3:\n\t\tb.caps.MaxTextureSize = 4096\n\t}\n\tif fmt, ok := detectFloatFormat(dev); ok {\n\t\tb.floatFormat = fmt\n\t\tb.caps.Features |= driver.FeatureFloatRenderTargets\n\t}\n\t// Disable backface culling to match OpenGL.\n\tstate, err := dev.CreateRasterizerState(&d3d11.RASTERIZER_DESC{\n\t\tCullMode: d3d11.CULL_NONE,\n\t\tFillMode: d3d11.FILL_SOLID,\n\t})\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\tdefer d3d11.IUnknownRelease(unsafe.Pointer(state), state.Vtbl.Release)\n\tb.ctx.RSSetState(state)\n\treturn b, nil\n}\n\nfunc (b *Backend) BeginFrame(target driver.RenderTarget, clear bool, viewport image.Point) driver.Texture {\n\tvar (\n\t\trenderTarget *d3d11.RenderTargetView\n\t)\n\tif target != nil {\n\t\tswitch t := target.(type) {\n\t\tcase driver.Direct3D11RenderTarget:\n\t\t\trenderTarget = (*d3d11.RenderTargetView)(t.RenderTarget)\n\t\tcase *Texture:\n\t\t\trenderTarget = t.renderTarget\n\t\tdefault:\n\t\t\tpanic(fmt.Errorf(\"d3d11: invalid render target type: %T\", target))\n\t\t}\n\t}\n\tb.ctx.OMSetRenderTargets(renderTarget, nil)\n\treturn &Texture{backend: b, renderTarget: renderTarget, foreign: true}\n}\n\nfunc (b *Backend) CopyTexture(dstTex driver.Texture, dstOrigin image.Point, srcTex driver.Texture, srcRect image.Rectangle) {\n\tdst := (*d3d11.Resource)(unsafe.Pointer(dstTex.(*Texture).tex))\n\tsrc := (*d3d11.Resource)(srcTex.(*Texture).tex)\n\tb.ctx.CopySubresourceRegion(\n\t\tdst,\n\t\t0, // Destination subresource.\n\t\tuint32(dstOrigin.X), uint32(dstOrigin.Y), 0, // Destination coordinates (x, y, z).\n\t\tsrc,\n\t\t0, // Source subresource.\n\t\t&d3d11.BOX{\n\t\t\tLeft: uint32(srcRect.Min.X),\n\t\t\tTop: uint32(srcRect.Min.Y),\n\t\t\tRight: uint32(srcRect.Max.X),\n\t\t\tBottom: uint32(srcRect.Max.Y),\n\t\t\tFront: 0,\n\t\t\tBack: 1,\n\t\t},\n\t)\n}\n\nfunc (b *Backend) EndFrame() {\n}\n\nfunc (b *Backend) Caps() driver.Caps {\n\treturn b.caps\n}\n\nfunc (b *Backend) NewTimer() driver.Timer {\n\tpanic(\"timers not supported\")\n}\n\nfunc (b *Backend) IsTimeContinuous() bool {\n\tpanic(\"timers not supported\")\n}\n\nfunc (b *Backend) Release() {\n\td3d11.IUnknownRelease(unsafe.Pointer(b.ctx), b.ctx.Vtbl.Release)\n\t*b = Backend{}\n}\n\nfunc (b *Backend) NewTexture(format driver.TextureFormat, width, height int, minFilter, magFilter driver.TextureFilter, bindings driver.BufferBinding) (driver.Texture, error) {\n\tvar d3dfmt uint32\n\tswitch format {\n\tcase driver.TextureFormatFloat:\n\t\td3dfmt = b.floatFormat\n\tcase driver.TextureFormatSRGBA:\n\t\td3dfmt = d3d11.DXGI_FORMAT_R8G8B8A8_UNORM_SRGB\n\tcase driver.TextureFormatRGBA8:\n\t\td3dfmt = d3d11.DXGI_FORMAT_R8G8B8A8_UNORM\n\tdefault:\n\t\treturn nil, fmt.Errorf(\"unsupported texture format %d\", format)\n\t}\n\ttex, err := b.dev.CreateTexture2D(&d3d11.TEXTURE2D_DESC{\n\t\tWidth: uint32(width),\n\t\tHeight: uint32(height),\n\t\tMipLevels: 1,\n\t\tArraySize: 1,\n\t\tFormat: d3dfmt,\n\t\tSampleDesc: d3d11.DXGI_SAMPLE_DESC{\n\t\t\tCount: 1,\n\t\t\tQuality: 0,\n\t\t},\n\t\tBindFlags: convBufferBinding(bindings),\n\t})\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\tvar (\n\t\tsampler *d3d11.SamplerState\n\t\tresView *d3d11.ShaderResourceView\n\t\tuaView *d3d11.UnorderedAccessView\n\t\tfbo *d3d11.RenderTargetView\n\t)\n\tif bindings&driver.BufferBindingTexture != 0 {\n\t\tvar filter uint32\n\t\tswitch {\n\t\tcase minFilter == driver.FilterNearest && magFilter == driver.FilterNearest:\n\t\t\tfilter = d3d11.FILTER_MIN_MAG_MIP_POINT\n\t\tcase minFilter == driver.FilterLinear && magFilter == driver.FilterLinear:\n\t\t\tfilter = d3d11.FILTER_MIN_MAG_LINEAR_MIP_POINT\n\t\tdefault:\n\t\t\td3d11.IUnknownRelease(unsafe.Pointer(tex), tex.Vtbl.Release)\n\t\t\treturn nil, fmt.Errorf(\"unsupported texture filter combination %d, %d\", minFilter, magFilter)\n\t\t}\n\t\tvar err error\n\t\tsampler, err = b.dev.CreateSamplerState(&d3d11.SAMPLER_DESC{\n\t\t\tFilter: filter,\n\t\t\tAddressU: d3d11.TEXTURE_ADDRESS_CLAMP,\n\t\t\tAddressV: d3d11.TEXTURE_ADDRESS_CLAMP,\n\t\t\tAddressW: d3d11.TEXTURE_ADDRESS_CLAMP,\n\t\t\tMaxAnisotropy: 1,\n\t\t\tMinLOD: -math.MaxFloat32,\n\t\t\tMaxLOD: math.MaxFloat32,\n\t\t})\n\t\tif err != nil {\n\t\t\td3d11.IUnknownRelease(unsafe.Pointer(tex), tex.Vtbl.Release)\n\t\t\treturn nil, err\n\t\t}\n\t\tresView, err = b.dev.CreateShaderResourceView(\n\t\t\t(*d3d11.Resource)(unsafe.Pointer(tex)),\n\t\t\tunsafe.Pointer(&d3d11.SHADER_RESOURCE_VIEW_DESC_TEX2D{\n\t\t\t\tSHADER_RESOURCE_VIEW_DESC: d3d11.SHADER_RESOURCE_VIEW_DESC{\n\t\t\t\t\tFormat: d3dfmt,\n\t\t\t\t\tViewDimension: d3d11.SRV_DIMENSION_TEXTURE2D,\n\t\t\t\t},\n\t\t\t\tTexture2D: d3d11.TEX2D_SRV{\n\t\t\t\t\tMostDetailedMip: 0,\n\t\t\t\t\tMipLevels: ^uint32(0),\n\t\t\t\t},\n\t\t\t}),\n\t\t)\n\t\tif err != nil {\n\t\t\td3d11.IUnknownRelease(unsafe.Pointer(tex), tex.Vtbl.Release)\n\t\t\td3d11.IUnknownRelease(unsafe.Pointer(sampler), sampler.Vtbl.Release)\n\t\t\treturn nil, err\n\t\t}\n\t}\n\tif bindings&driver.BufferBindingShaderStorageWrite != 0 {\n\t\tuaView, err = b.dev.CreateUnorderedAccessView(\n\t\t\t(*d3d11.Resource)(unsafe.Pointer(tex)),\n\t\t\tunsafe.Pointer(&d3d11.UNORDERED_ACCESS_VIEW_DESC_TEX2D{\n\t\t\t\tUNORDERED_ACCESS_VIEW_DESC: d3d11.UNORDERED_ACCESS_VIEW_DESC{\n\t\t\t\t\tFormat: d3dfmt,\n\t\t\t\t\tViewDimension: d3d11.UAV_DIMENSION_TEXTURE2D,\n\t\t\t\t},\n\t\t\t\tTexture2D: d3d11.TEX2D_UAV{\n\t\t\t\t\tMipSlice: 0,\n\t\t\t\t},\n\t\t\t}),\n\t\t)\n\t\tif err != nil {\n\t\t\tif sampler != nil {\n\t\t\t\td3d11.IUnknownRelease(unsafe.Pointer(sampler), sampler.Vtbl.Release)\n\t\t\t}\n\t\t\tif resView != nil {\n\t\t\t\td3d11.IUnknownRelease(unsafe.Pointer(resView), resView.Vtbl.Release)\n\t\t\t}\n\t\t\td3d11.IUnknownRelease(unsafe.Pointer(tex), tex.Vtbl.Release)\n\t\t\treturn nil, err\n\t\t}\n\t}\n\tif bindings&driver.BufferBindingFramebuffer != 0 {\n\t\tresource := (*d3d11.Resource)(unsafe.Pointer(tex))\n\t\tfbo, err = b.dev.CreateRenderTargetView(resource)\n\t\tif err != nil {\n\t\t\tif uaView != nil {\n\t\t\t\td3d11.IUnknownRelease(unsafe.Pointer(uaView), uaView.Vtbl.Release)\n\t\t\t}\n\t\t\tif sampler != nil {\n\t\t\t\td3d11.IUnknownRelease(unsafe.Pointer(sampler), sampler.Vtbl.Release)\n\t\t\t}\n\t\t\tif resView != nil {\n\t\t\t\td3d11.IUnknownRelease(unsafe.Pointer(resView), resView.Vtbl.Release)\n\t\t\t}\n\t\t\td3d11.IUnknownRelease(unsafe.Pointer(tex), tex.Vtbl.Release)\n\t\t\treturn nil, err\n\t\t}\n\t}\n\treturn &Texture{backend: b, format: d3dfmt, tex: tex, sampler: sampler, resView: resView, uaView: uaView, renderTarget: fbo, bindings: bindings, width: width, height: height}, nil\n}\n\nfunc (b *Backend) newInputLayout(vertexShader shader.Sources, layout []driver.InputDesc) (*d3d11.InputLayout, error) {\n\tif len(vertexShader.Inputs) != len(layout) {\n\t\treturn nil, fmt.Errorf(\"NewInputLayout: got %d inputs, expected %d\", len(layout), len(vertexShader.Inputs))\n\t}\n\tdescs := make([]d3d11.INPUT_ELEMENT_DESC, len(layout))\n\tfor i, l := range layout {\n\t\tinp := vertexShader.Inputs[i]\n\t\tcname, err := windows.BytePtrFromString(inp.Semantic)\n\t\tif err != nil {\n\t\t\treturn nil, err\n\t\t}\n\t\tvar format uint32\n\t\tswitch l.Type {\n\t\tcase shader.DataTypeFloat:\n\t\t\tswitch l.Size {\n\t\t\tcase 1:\n\t\t\t\tformat = d3d11.DXGI_FORMAT_R32_FLOAT\n\t\t\tcase 2:\n\t\t\t\tformat = d3d11.DXGI_FORMAT_R32G32_FLOAT\n\t\t\tcase 3:\n\t\t\t\tformat = d3d11.DXGI_FORMAT_R32G32B32_FLOAT\n\t\t\tcase 4:\n\t\t\t\tformat = d3d11.DXGI_FORMAT_R32G32B32A32_FLOAT\n\t\t\tdefault:\n\t\t\t\tpanic(\"unsupported data size\")\n\t\t\t}\n\t\tcase shader.DataTypeShort:\n\t\t\tswitch l.Size {\n\t\t\tcase 1:\n\t\t\t\tformat = d3d11.DXGI_FORMAT_R16_SINT\n\t\t\tcase 2:\n\t\t\t\tformat = d3d11.DXGI_FORMAT_R16G16_SINT\n\t\t\tdefault:\n\t\t\t\tpanic(\"unsupported data size\")\n\t\t\t}\n\t\tdefault:\n\t\t\tpanic(\"unsupported data type\")\n\t\t}\n\t\tdescs[i] = d3d11.INPUT_ELEMENT_DESC{\n\t\t\tSemanticName: cname,\n\t\t\tSemanticIndex: uint32(inp.SemanticIndex),\n\t\t\tFormat: format,\n\t\t\tAlignedByteOffset: uint32(l.Offset),\n\t\t}\n\t}\n\treturn b.dev.CreateInputLayout(descs, []byte(vertexShader.DXBC))\n}\n\nfunc (b *Backend) NewBuffer(typ driver.BufferBinding, size int) (driver.Buffer, error) {\n\treturn b.newBuffer(typ, size, nil, false)\n}\n\nfunc (b *Backend) NewImmutableBuffer(typ driver.BufferBinding, data []byte) (driver.Buffer, error) {\n\treturn b.newBuffer(typ, len(data), data, true)\n}\n\nfunc (b *Backend) newBuffer(typ driver.BufferBinding, size int, data []byte, immutable bool) (*Buffer, error) {\n\tif typ&driver.BufferBindingUniforms != 0 {\n\t\tif typ != driver.BufferBindingUniforms {\n\t\t\treturn nil, errors.New(\"uniform buffers cannot have other bindings\")\n\t\t}\n\t\tif size%16 != 0 {\n\t\t\treturn nil, fmt.Errorf(\"constant buffer size is %d, expected a multiple of 16\", size)\n\t\t}\n\t}\n\tbind := convBufferBinding(typ)\n\tvar usage, miscFlags, cpuFlags uint32\n\tif immutable {\n\t\tusage = d3d11.USAGE_IMMUTABLE\n\t}\n\tif typ&driver.BufferBindingShaderStorageWrite != 0 {\n\t\tcpuFlags = d3d11.CPU_ACCESS_READ\n\t}\n\tif typ&(driver.BufferBindingShaderStorageRead|driver.BufferBindingShaderStorageWrite) != 0 {\n\t\tmiscFlags |= d3d11.RESOURCE_MISC_BUFFER_ALLOW_RAW_VIEWS\n\t}\n\tbuf, err := b.dev.CreateBuffer(&d3d11.BUFFER_DESC{\n\t\tByteWidth: uint32(size),\n\t\tUsage: usage,\n\t\tBindFlags: bind,\n\t\tCPUAccessFlags: cpuFlags,\n\t\tMiscFlags: miscFlags,\n\t}, data)\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\tvar (\n\t\tresView *d3d11.ShaderResourceView\n\t\tuaView *d3d11.UnorderedAccessView\n\t)\n\tif typ&driver.BufferBindingShaderStorageWrite != 0 {\n\t\tuaView, err = b.dev.CreateUnorderedAccessView(\n\t\t\t(*d3d11.Resource)(unsafe.Pointer(buf)),\n\t\t\tunsafe.Pointer(&d3d11.UNORDERED_ACCESS_VIEW_DESC_BUFFER{\n\t\t\t\tUNORDERED_ACCESS_VIEW_DESC: d3d11.UNORDERED_ACCESS_VIEW_DESC{\n\t\t\t\t\tFormat: d3d11.DXGI_FORMAT_R32_TYPELESS,\n\t\t\t\t\tViewDimension: d3d11.UAV_DIMENSION_BUFFER,\n\t\t\t\t},\n\t\t\t\tBuffer: d3d11.BUFFER_UAV{\n\t\t\t\t\tFirstElement: 0,\n\t\t\t\t\tNumElements: uint32(size / 4),\n\t\t\t\t\tFlags: d3d11.BUFFER_UAV_FLAG_RAW,\n\t\t\t\t},\n\t\t\t}),\n\t\t)\n\t\tif err != nil {\n\t\t\td3d11.IUnknownRelease(unsafe.Pointer(buf), buf.Vtbl.Release)\n\t\t\treturn nil, err\n\t\t}\n\t} else if typ&driver.BufferBindingShaderStorageRead != 0 {\n\t\tresView, err = b.dev.CreateShaderResourceView(\n\t\t\t(*d3d11.Resource)(unsafe.Pointer(buf)),\n\t\t\tunsafe.Pointer(&d3d11.SHADER_RESOURCE_VIEW_DESC_BUFFEREX{\n\t\t\t\tSHADER_RESOURCE_VIEW_DESC: d3d11.SHADER_RESOURCE_VIEW_DESC{\n\t\t\t\t\tFormat: d3d11.DXGI_FORMAT_R32_TYPELESS,\n\t\t\t\t\tViewDimension: d3d11.SRV_DIMENSION_BUFFEREX,\n\t\t\t\t},\n\t\t\t\tBuffer: d3d11.BUFFEREX_SRV{\n\t\t\t\t\tFirstElement: 0,\n\t\t\t\t\tNumElements: uint32(size / 4),\n\t\t\t\t\tFlags: d3d11.BUFFEREX_SRV_FLAG_RAW,\n\t\t\t\t},\n\t\t\t}),\n\t\t)\n\t\tif err != nil {\n\t\t\td3d11.IUnknownRelease(unsafe.Pointer(buf), buf.Vtbl.Release)\n\t\t\treturn nil, err\n\t\t}\n\t}\n\treturn &Buffer{backend: b, buf: buf, bind: bind, size: size, resView: resView, uaView: uaView, immutable: immutable}, nil\n}\n\nfunc (b *Backend) NewComputeProgram(shader shader.Sources) (driver.Program, error) {\n\tcs, err := b.dev.CreateComputeShader([]byte(shader.DXBC))\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\treturn &Program{backend: b, shader: cs}, nil\n}\n\nfunc (b *Backend) NewPipeline(desc driver.PipelineDesc) (driver.Pipeline, error) {\n\tvsh := desc.VertexShader.(*VertexShader)\n\tfsh := desc.FragmentShader.(*FragmentShader)\n\tblend, err := b.newBlendState(desc.BlendDesc)\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\tvar layout *d3d11.InputLayout\n\tif l := desc.VertexLayout; l.Stride > 0 {\n\t\tvar err error\n\t\tlayout, err = b.newInputLayout(vsh.src, l.Inputs)\n\t\tif err != nil {\n\t\t\td3d11.IUnknownRelease(unsafe.Pointer(blend), blend.Vtbl.AddRef)\n\t\t\treturn nil, err\n\t\t}\n\t}\n\n\t// Retain shaders.\n\tvshRef := vsh.shader\n\tfshRef := fsh.shader\n\td3d11.IUnknownAddRef(unsafe.Pointer(vshRef), vshRef.Vtbl.AddRef)\n\td3d11.IUnknownAddRef(unsafe.Pointer(fshRef), fshRef.Vtbl.AddRef)\n\n\treturn &Pipeline{\n\t\tvert: vshRef,\n\t\tfrag: fshRef,\n\t\tlayout: layout,\n\t\tstride: desc.VertexLayout.Stride,\n\t\tblend: blend,\n\t\ttopology: desc.Topology,\n\t}, nil\n}\n\nfunc (b *Backend) newBlendState(desc driver.BlendDesc) (*d3d11.BlendState, error) {\n\tvar d3ddesc d3d11.BLEND_DESC\n\tt0 := &d3ddesc.RenderTarget[0]\n\tt0.RenderTargetWriteMask = d3d11.COLOR_WRITE_ENABLE_ALL\n\tt0.BlendOp = d3d11.BLEND_OP_ADD\n\tt0.BlendOpAlpha = d3d11.BLEND_OP_ADD\n\tif desc.Enable {\n\t\tt0.BlendEnable = 1\n\t}\n\tscol, salpha := toBlendFactor(desc.SrcFactor)\n\tdcol, dalpha := toBlendFactor(desc.DstFactor)\n\tt0.SrcBlend = scol\n\tt0.SrcBlendAlpha = salpha\n\tt0.DestBlend = dcol\n\tt0.DestBlendAlpha = dalpha\n\treturn b.dev.CreateBlendState(&d3ddesc)\n}\n\nfunc (b *Backend) NewVertexShader(src shader.Sources) (driver.VertexShader, error) {\n\tvs, err := b.dev.CreateVertexShader([]byte(src.DXBC))\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\treturn &VertexShader{b, vs, src}, nil\n}\n\nfunc (b *Backend) NewFragmentShader(src shader.Sources) (driver.FragmentShader, error) {\n\tfs, err := b.dev.CreatePixelShader([]byte(src.DXBC))\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\treturn &FragmentShader{b, fs}, nil\n}\n\nfunc (b *Backend) Viewport(x, y, width, height int) {\n\tb.viewport = d3d11.VIEWPORT{\n\t\tTopLeftX: float32(x),\n\t\tTopLeftY: float32(y),\n\t\tWidth: float32(width),\n\t\tHeight: float32(height),\n\t\tMinDepth: 0.0,\n\t\tMaxDepth: 1.0,\n\t}\n\tb.ctx.RSSetViewports(&b.viewport)\n}\n\nfunc (b *Backend) DrawArrays(off, count int) {\n\tb.prepareDraw()\n\tb.ctx.Draw(uint32(count), uint32(off))\n}\n\nfunc (b *Backend) DrawElements(off, count int) {\n\tb.prepareDraw()\n\tb.ctx.DrawIndexed(uint32(count), uint32(off), 0)\n}\n\nfunc (b *Backend) prepareDraw() {\n\tp := b.pipeline\n\tif p == nil {\n\t\treturn\n\t}\n\tb.ctx.VSSetShader(p.vert)\n\tb.ctx.PSSetShader(p.frag)\n\tb.ctx.IASetInputLayout(p.layout)\n\tb.ctx.OMSetBlendState(p.blend, nil, 0xffffffff)\n\tif b.vert.buffer != nil {\n\t\tb.ctx.IASetVertexBuffers(b.vert.buffer.buf, uint32(p.stride), uint32(b.vert.offset))\n\t}\n\tvar topology uint32\n\tswitch p.topology {\n\tcase driver.TopologyTriangles:\n\t\ttopology = d3d11.PRIMITIVE_TOPOLOGY_TRIANGLELIST\n\tcase driver.TopologyTriangleStrip:\n\t\ttopology = d3d11.PRIMITIVE_TOPOLOGY_TRIANGLESTRIP\n\tdefault:\n\t\tpanic(\"unsupported draw mode\")\n\t}\n\tb.ctx.IASetPrimitiveTopology(topology)\n}\n\nfunc (b *Backend) BindImageTexture(unit int, tex driver.Texture) {\n\tt := tex.(*Texture)\n\tif t.uaView != nil {\n\t\tb.ctx.CSSetUnorderedAccessViews(uint32(unit), t.uaView)\n\t} else {\n\t\tb.ctx.CSSetShaderResources(uint32(unit), t.resView)\n\t}\n}\n\nfunc (b *Backend) DispatchCompute(x, y, z int) {\n\tb.ctx.CSSetShader(b.program.shader)\n\tb.ctx.Dispatch(uint32(x), uint32(y), uint32(z))\n}\n\nfunc (t *Texture) Upload(offset, size image.Point, pixels []byte, stride int) {\n\tif stride == 0 {\n\t\tstride = size.X * 4\n\t}\n\tdst := &d3d11.BOX{\n\t\tLeft: uint32(offset.X),\n\t\tTop: uint32(offset.Y),\n\t\tRight: uint32(offset.X + size.X),\n\t\tBottom: uint32(offset.Y + size.Y),\n\t\tFront: 0,\n\t\tBack: 1,\n\t}\n\tres := (*d3d11.Resource)(unsafe.Pointer(t.tex))\n\tt.backend.ctx.UpdateSubresource(res, dst, uint32(stride), uint32(len(pixels)), pixels)\n}\n\nfunc (t *Texture) Release() {\n\tif t.foreign {\n\t\tpanic(\"texture not created by NewTexture\")\n\t}\n\tif t.renderTarget != nil {\n\t\td3d11.IUnknownRelease(unsafe.Pointer(t.renderTarget), t.renderTarget.Vtbl.Release)\n\t}\n\tif t.sampler != nil {\n\t\td3d11.IUnknownRelease(unsafe.Pointer(t.sampler), t.sampler.Vtbl.Release)\n\t}\n\tif t.resView != nil {\n\t\td3d11.IUnknownRelease(unsafe.Pointer(t.resView), t.resView.Vtbl.Release)\n\t}\n\tif t.uaView != nil {\n\t\td3d11.IUnknownRelease(unsafe.Pointer(t.uaView), t.uaView.Vtbl.Release)\n\t}\n\td3d11.IUnknownRelease(unsafe.Pointer(t.tex), t.tex.Vtbl.Release)\n\t*t = Texture{}\n}\n\nfunc (b *Backend) PrepareTexture(tex driver.Texture) {}\n\nfunc (b *Backend) BindTexture(unit int, tex driver.Texture) {\n\tt := tex.(*Texture)\n\tb.ctx.PSSetSamplers(uint32(unit), t.sampler)\n\tb.ctx.PSSetShaderResources(uint32(unit), t.resView)\n}\n\nfunc (b *Backend) BindPipeline(pipe driver.Pipeline) {\n\tb.pipeline = pipe.(*Pipeline)\n}\n\nfunc (b *Backend) BindProgram(prog driver.Program) {\n\tb.program = prog.(*Program)\n}\n\nfunc (s *VertexShader) Release() {\n\td3d11.IUnknownRelease(unsafe.Pointer(s.shader), s.shader.Vtbl.Release)\n\t*s = VertexShader{}\n}\n\nfunc (s *FragmentShader) Release() {\n\td3d11.IUnknownRelease(unsafe.Pointer(s.shader), s.shader.Vtbl.Release)\n\t*s = FragmentShader{}\n}\n\nfunc (s *Program) Release() {\n\td3d11.IUnknownRelease(unsafe.Pointer(s.shader), s.shader.Vtbl.Release)\n\t*s = Program{}\n}\n\nfunc (p *Pipeline) Release() {\n\td3d11.IUnknownRelease(unsafe.Pointer(p.vert), p.vert.Vtbl.Release)\n\td3d11.IUnknownRelease(unsafe.Pointer(p.frag), p.frag.Vtbl.Release)\n\td3d11.IUnknownRelease(unsafe.Pointer(p.blend), p.blend.Vtbl.Release)\n\tif l := p.layout; l != nil {\n\t\td3d11.IUnknownRelease(unsafe.Pointer(l), l.Vtbl.Release)\n\t}\n\t*p = Pipeline{}\n}\n\nfunc (b *Backend) BindStorageBuffer(binding int, buffer driver.Buffer) {\n\tbuf := buffer.(*Buffer)\n\tif buf.resView != nil {\n\t\tb.ctx.CSSetShaderResources(uint32(binding), buf.resView)\n\t} else {\n\t\tb.ctx.CSSetUnorderedAccessViews(uint32(binding), buf.uaView)\n\t}\n}\n\nfunc (b *Backend) BindUniforms(buffer driver.Buffer) {\n\tbuf := buffer.(*Buffer)\n\tb.ctx.VSSetConstantBuffers(buf.buf)\n\tb.ctx.PSSetConstantBuffers(buf.buf)\n}\n\nfunc (b *Backend) BindVertexBuffer(buf driver.Buffer, offset int) {\n\tb.vert.buffer = buf.(*Buffer)\n\tb.vert.offset = offset\n}\n\nfunc (b *Backend) BindIndexBuffer(buf driver.Buffer) {\n\tb.ctx.IASetIndexBuffer(buf.(*Buffer).buf, d3d11.DXGI_FORMAT_R16_UINT, 0)\n}\n\nfunc (b *Buffer) Download(dst []byte) error {\n\tres := (*d3d11.Resource)(unsafe.Pointer(b.buf))\n\tresMap, err := b.backend.ctx.Map(res, 0, d3d11.MAP_READ, 0)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"d3d11: %v\", err)\n\t}\n\tdefer b.backend.ctx.Unmap(res, 0)\n\tdata := sliceOf(resMap.PData, len(dst))\n\tcopy(dst, data)\n\treturn nil\n}\n\nfunc (b *Buffer) Upload(data []byte) {\n\tvar dst *d3d11.BOX\n\tif len(data) < b.size {\n\t\tdst = &d3d11.BOX{\n\t\t\tLeft: 0,\n\t\t\tRight: uint32(len(data)),\n\t\t\tTop: 0,\n\t\t\tBottom: 1,\n\t\t\tFront: 0,\n\t\t\tBack: 1,\n\t\t}\n\t}\n\tb.backend.ctx.UpdateSubresource((*d3d11.Resource)(unsafe.Pointer(b.buf)), dst, 0, 0, data)\n}\n\nfunc (b *Buffer) Release() {\n\tif b.resView != nil {\n\t\td3d11.IUnknownRelease(unsafe.Pointer(b.resView), b.resView.Vtbl.Release)\n\t}\n\tif b.uaView != nil {\n\t\td3d11.IUnknownRelease(unsafe.Pointer(b.uaView), b.uaView.Vtbl.Release)\n\t}\n\td3d11.IUnknownRelease(unsafe.Pointer(b.buf), b.buf.Vtbl.Release)\n\t*b = Buffer{}\n}\n\nfunc (t *Texture) ReadPixels(src image.Rectangle, pixels []byte, stride int) error {\n\tw, h := src.Dx(), src.Dy()\n\ttex, err := t.backend.dev.CreateTexture2D(&d3d11.TEXTURE2D_DESC{\n\t\tWidth: uint32(w),\n\t\tHeight: uint32(h),\n\t\tMipLevels: 1,\n\t\tArraySize: 1,\n\t\tFormat: t.format,\n\t\tSampleDesc: d3d11.DXGI_SAMPLE_DESC{\n\t\t\tCount: 1,\n\t\t\tQuality: 0,\n\t\t},\n\t\tUsage: d3d11.USAGE_STAGING,\n\t\tCPUAccessFlags: d3d11.CPU_ACCESS_READ,\n\t})\n\tif err != nil {\n\t\treturn fmt.Errorf(\"ReadPixels: %v\", err)\n\t}\n\tdefer d3d11.IUnknownRelease(unsafe.Pointer(tex), tex.Vtbl.Release)\n\tres := (*d3d11.Resource)(unsafe.Pointer(tex))\n\tt.backend.ctx.CopySubresourceRegion(\n\t\tres,\n\t\t0, // Destination subresource.\n\t\t0, 0, 0, // Destination coordinates (x, y, z).\n\t\t(*d3d11.Resource)(t.tex),\n\t\t0, // Source subresource.\n\t\t&d3d11.BOX{\n\t\t\tLeft: uint32(src.Min.X),\n\t\t\tTop: uint32(src.Min.Y),\n\t\t\tRight: uint32(src.Max.X),\n\t\t\tBottom: uint32(src.Max.Y),\n\t\t\tFront: 0,\n\t\t\tBack: 1,\n\t\t},\n\t)\n\tresMap, err := t.backend.ctx.Map(res, 0, d3d11.MAP_READ, 0)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"ReadPixels: %v\", err)\n\t}\n\tdefer t.backend.ctx.Unmap(res, 0)\n\tsrcPitch := stride\n\tdstPitch := int(resMap.RowPitch)\n\tmapSize := dstPitch * h\n\tdata := sliceOf(resMap.PData, mapSize)\n\twidth := w * 4\n\tfor r := 0; r < h; r++ {\n\t\tpixels := pixels[r*srcPitch:]\n\t\tcopy(pixels[:width], data[r*dstPitch:])\n\t}\n\treturn nil\n}\n\nfunc (b *Backend) BeginCompute() {\n}\n\nfunc (b *Backend) EndCompute() {\n}\n\nfunc (b *Backend) BeginRenderPass(tex driver.Texture, d driver.LoadDesc) {\n\tt := tex.(*Texture)\n\tb.ctx.OMSetRenderTargets(t.renderTarget, nil)\n\tif d.Action == driver.LoadActionClear {\n\t\tc := d.ClearColor\n\t\tb.clearColor = [4]float32{c.R, c.G, c.B, c.A}\n\t\tb.ctx.ClearRenderTargetView(t.renderTarget, &b.clearColor)\n\t}\n}\n\nfunc (b *Backend) EndRenderPass() {\n}\n\nfunc (f *Texture) ImplementsRenderTarget() {}\n\nfunc convBufferBinding(typ driver.BufferBinding) uint32 {\n\tvar bindings uint32\n\tif typ&driver.BufferBindingVertices != 0 {\n\t\tbindings |= d3d11.BIND_VERTEX_BUFFER\n\t}\n\tif typ&driver.BufferBindingIndices != 0 {\n\t\tbindings |= d3d11.BIND_INDEX_BUFFER\n\t}\n\tif typ&driver.BufferBindingUniforms != 0 {\n\t\tbindings |= d3d11.BIND_CONSTANT_BUFFER\n\t}\n\tif typ&driver.BufferBindingTexture != 0 {\n\t\tbindings |= d3d11.BIND_SHADER_RESOURCE\n\t}\n\tif typ&driver.BufferBindingFramebuffer != 0 {\n\t\tbindings |= d3d11.BIND_RENDER_TARGET\n\t}\n\tif typ&driver.BufferBindingShaderStorageWrite != 0 {\n\t\tbindings |= d3d11.BIND_UNORDERED_ACCESS\n\t} else if typ&driver.BufferBindingShaderStorageRead != 0 {\n\t\tbindings |= d3d11.BIND_SHADER_RESOURCE\n\t}\n\treturn bindings\n}\n\nfunc toBlendFactor(f driver.BlendFactor) (uint32, uint32) {\n\tswitch f {\n\tcase driver.BlendFactorOne:\n\t\treturn d3d11.BLEND_ONE, d3d11.BLEND_ONE\n\tcase driver.BlendFactorOneMinusSrcAlpha:\n\t\treturn d3d11.BLEND_INV_SRC_ALPHA, d3d11.BLEND_INV_SRC_ALPHA\n\tcase driver.BlendFactorZero:\n\t\treturn d3d11.BLEND_ZERO, d3d11.BLEND_ZERO\n\tcase driver.BlendFactorDstColor:\n\t\treturn d3d11.BLEND_DEST_COLOR, d3d11.BLEND_DEST_ALPHA\n\tdefault:\n\t\tpanic(\"unsupported blend source factor\")\n\t}\n}\n\n// sliceOf returns a slice from a (native) pointer.\nfunc sliceOf(ptr uintptr, cap int) []byte {\n\tvar data []byte\n\th := (*reflect.SliceHeader)(unsafe.Pointer(&data))\n\th.Data = ptr\n\th.Cap = cap\n\th.Len = cap\n\treturn data\n}\n"
},
{
"path": "vendor/gioui.org/gpu/internal/driver/api.go",
"content": "// SPDX-License-Identifier: Unlicense OR MIT\n\npackage driver\n\nimport (\n\t\"fmt\"\n\t\"unsafe\"\n\n\t\"gioui.org/internal/gl\"\n)\n\n// See gpu/api.go for documentation for the API types.\n\ntype API interface {\n\timplementsAPI()\n}\n\ntype RenderTarget interface {\n\tImplementsRenderTarget()\n}\n\ntype OpenGLRenderTarget gl.Framebuffer\n\ntype Direct3D11RenderTarget struct {\n\t// RenderTarget is a *ID3D11RenderTargetView.\n\tRenderTarget unsafe.Pointer\n}\n\ntype MetalRenderTarget struct {\n\t// Texture is a MTLTexture.\n\tTexture uintptr\n}\n\ntype VulkanRenderTarget struct {\n\t// WaitSem is a VkSemaphore that must signaled before accessing Framebuffer.\n\tWaitSem uint64\n\t// SignalSem is a VkSemaphore that signal access to Framebuffer is complete.\n\tSignalSem uint64\n\t// Image is the VkImage to render into.\n\tImage uint64\n\t// Framebuffer is a VkFramebuffer for Image.\n\tFramebuffer uint64\n}\n\ntype OpenGL struct {\n\t// ES forces the use of ANGLE OpenGL ES libraries on macOS. It is\n\t// ignored on all other platforms.\n\tES bool\n\t// Context contains the WebGL context for WebAssembly platforms. It is\n\t// empty for all other platforms; an OpenGL context is assumed current when\n\t// calling NewDevice.\n\tContext gl.Context\n\t// Shared instructs users of the context to restore the GL state after\n\t// use.\n\tShared bool\n}\n\ntype Direct3D11 struct {\n\t// Device contains a *ID3D11Device.\n\tDevice unsafe.Pointer\n}\n\ntype Metal struct {\n\t// Device is an MTLDevice.\n\tDevice uintptr\n\t// Queue is a MTLCommandQueue.\n\tQueue uintptr\n\t// PixelFormat is the MTLPixelFormat of the default framebuffer.\n\tPixelFormat int\n}\n\ntype Vulkan struct {\n\t// PhysDevice is a VkPhysicalDevice.\n\tPhysDevice unsafe.Pointer\n\t// Device is a VkDevice.\n\tDevice unsafe.Pointer\n\t// QueueFamily is the queue familily index of the queue.\n\tQueueFamily int\n\t// QueueIndex is the logical queue index of the queue.\n\tQueueIndex int\n\t// Format is a VkFormat that matches render targets.\n\tFormat int\n}\n\n// API specific device constructors.\nvar (\n\tNewOpenGLDevice func(api OpenGL) (Device, error)\n\tNewDirect3D11Device func(api Direct3D11) (Device, error)\n\tNewMetalDevice func(api Metal) (Device, error)\n\tNewVulkanDevice func(api Vulkan) (Device, error)\n)\n\n// NewDevice creates a new Device given the api.\n//\n// Note that the device does not assume ownership of the resources contained in\n// api; the caller must ensure the resources are valid until the device is\n// released.\nfunc NewDevice(api API) (Device, error) {\n\tswitch api := api.(type) {\n\tcase OpenGL:\n\t\tif NewOpenGLDevice != nil {\n\t\t\treturn NewOpenGLDevice(api)\n\t\t}\n\tcase Direct3D11:\n\t\tif NewDirect3D11Device != nil {\n\t\t\treturn NewDirect3D11Device(api)\n\t\t}\n\tcase Metal:\n\t\tif NewMetalDevice != nil {\n\t\t\treturn NewMetalDevice(api)\n\t\t}\n\tcase Vulkan:\n\t\tif NewVulkanDevice != nil {\n\t\t\treturn NewVulkanDevice(api)\n\t\t}\n\t}\n\treturn nil, fmt.Errorf(\"driver: no driver available for the API %T\", api)\n}\n\nfunc (OpenGL) implementsAPI() {}\nfunc (Direct3D11) implementsAPI() {}\nfunc (Metal) implementsAPI() {}\nfunc (Vulkan) implementsAPI() {}\nfunc (OpenGLRenderTarget) ImplementsRenderTarget() {}\nfunc (Direct3D11RenderTarget) ImplementsRenderTarget() {}\nfunc (MetalRenderTarget) ImplementsRenderTarget() {}\nfunc (VulkanRenderTarget) ImplementsRenderTarget() {}\n"
},
{
"path": "vendor/gioui.org/gpu/internal/driver/driver.go",
"content": "// SPDX-License-Identifier: Unlicense OR MIT\n\npackage driver\n\nimport (\n\t\"errors\"\n\t\"image\"\n\t\"time\"\n\n\t\"gioui.org/internal/f32color\"\n\t\"gioui.org/shader\"\n)\n\n// Device represents the abstraction of underlying GPU\n// APIs such as OpenGL, Direct3D useful for rendering Gio\n// operations.\ntype Device interface {\n\tBeginFrame(target RenderTarget, clear bool, viewport image.Point) Texture\n\tEndFrame()\n\tCaps() Caps\n\tNewTimer() Timer\n\t// IsContinuousTime reports whether all timer measurements\n\t// are valid at the point of call.\n\tIsTimeContinuous() bool\n\tNewTexture(format TextureFormat, width, height int, minFilter, magFilter TextureFilter, bindings BufferBinding) (Texture, error)\n\tNewImmutableBuffer(typ BufferBinding, data []byte) (Buffer, error)\n\tNewBuffer(typ BufferBinding, size int) (Buffer, error)\n\tNewComputeProgram(shader shader.Sources) (Program, error)\n\tNewVertexShader(src shader.Sources) (VertexShader, error)\n\tNewFragmentShader(src shader.Sources) (FragmentShader, error)\n\tNewPipeline(desc PipelineDesc) (Pipeline, error)\n\n\tViewport(x, y, width, height int)\n\tDrawArrays(off, count int)\n\tDrawElements(off, count int)\n\n\tBeginRenderPass(t Texture, desc LoadDesc)\n\tEndRenderPass()\n\tPrepareTexture(t Texture)\n\tBindProgram(p Program)\n\tBindPipeline(p Pipeline)\n\tBindTexture(unit int, t Texture)\n\tBindVertexBuffer(b Buffer, offset int)\n\tBindIndexBuffer(b Buffer)\n\tBindImageTexture(unit int, texture Texture)\n\tBindUniforms(buf Buffer)\n\tBindStorageBuffer(binding int, buf Buffer)\n\n\tBeginCompute()\n\tEndCompute()\n\tCopyTexture(dst Texture, dstOrigin image.Point, src Texture, srcRect image.Rectangle)\n\tDispatchCompute(x, y, z int)\n\n\tRelease()\n}\n\nvar ErrDeviceLost = errors.New(\"GPU device lost\")\n\ntype LoadDesc struct {\n\tAction LoadAction\n\tClearColor f32color.RGBA\n}\n\ntype Pipeline interface {\n\tRelease()\n}\n\ntype PipelineDesc struct {\n\tVertexShader VertexShader\n\tFragmentShader FragmentShader\n\tVertexLayout VertexLayout\n\tBlendDesc BlendDesc\n\tPixelFormat TextureFormat\n\tTopology Topology\n}\n\ntype VertexLayout struct {\n\tInputs []InputDesc\n\tStride int\n}\n\n// InputDesc describes a vertex attribute as laid out in a Buffer.\ntype InputDesc struct {\n\tType shader.DataType\n\tSize int\n\n\tOffset int\n}\n\ntype BlendDesc struct {\n\tEnable bool\n\tSrcFactor, DstFactor BlendFactor\n}\n\ntype BlendFactor uint8\n\ntype Topology uint8\n\ntype TextureFilter uint8\ntype TextureFormat uint8\n\ntype BufferBinding uint8\n\ntype LoadAction uint8\n\ntype Features uint\n\ntype Caps struct {\n\t// BottomLeftOrigin is true if the driver has the origin in the lower left\n\t// corner. The OpenGL driver returns true.\n\tBottomLeftOrigin bool\n\tFeatures Features\n\tMaxTextureSize int\n}\n\ntype VertexShader interface {\n\tRelease()\n}\n\ntype FragmentShader interface {\n\tRelease()\n}\n\ntype Program interface {\n\tRelease()\n}\n\ntype Buffer interface {\n\tRelease()\n\tUpload(data []byte)\n\tDownload(data []byte) error\n}\n\ntype Timer interface {\n\tBegin()\n\tEnd()\n\tDuration() (time.Duration, bool)\n\tRelease()\n}\n\ntype Texture interface {\n\tRenderTarget\n\tUpload(offset, size image.Point, pixels []byte, stride int)\n\tReadPixels(src image.Rectangle, pixels []byte, stride int) error\n\tRelease()\n}\n\nconst (\n\tBufferBindingIndices BufferBinding = 1 << iota\n\tBufferBindingVertices\n\tBufferBindingUniforms\n\tBufferBindingTexture\n\tBufferBindingFramebuffer\n\tBufferBindingShaderStorageRead\n\tBufferBindingShaderStorageWrite\n)\n\nconst (\n\tTextureFormatSRGBA TextureFormat = iota\n\tTextureFormatFloat\n\tTextureFormatRGBA8\n\t// TextureFormatOutput denotes the format used by the output framebuffer.\n\tTextureFormatOutput\n)\n\nconst (\n\tFilterNearest TextureFilter = iota\n\tFilterLinear\n)\n\nconst (\n\tFeatureTimers Features = 1 << iota\n\tFeatureFloatRenderTargets\n\tFeatureCompute\n\tFeatureSRGB\n)\n\nconst (\n\tTopologyTriangleStrip Topology = iota\n\tTopologyTriangles\n)\n\nconst (\n\tBlendFactorOne BlendFactor = iota\n\tBlendFactorOneMinusSrcAlpha\n\tBlendFactorZero\n\tBlendFactorDstColor\n)\n\nconst (\n\tLoadActionKeep LoadAction = iota\n\tLoadActionClear\n\tLoadActionInvalidate\n)\n\nvar ErrContentLost = errors.New(\"buffer content lost\")\n\nfunc (f Features) Has(feats Features) bool {\n\treturn f&feats == feats\n}\n\nfunc DownloadImage(d Device, t Texture, img *image.RGBA) error {\n\tr := img.Bounds()\n\tif err := t.ReadPixels(r, img.Pix, img.Stride); err != nil {\n\t\treturn err\n\t}\n\tif d.Caps().BottomLeftOrigin {\n\t\t// OpenGL origin is in the lower-left corner. Flip the image to\n\t\t// match.\n\t\tflipImageY(r.Dx()*4, r.Dy(), img.Pix)\n\t}\n\treturn nil\n}\n\nfunc flipImageY(stride, height int, pixels []byte) {\n\t// Flip image in y-direction. OpenGL's origin is in the lower\n\t// left corner.\n\trow := make([]uint8, stride)\n\tfor y := 0; y < height/2; y++ {\n\t\ty1 := height - y - 1\n\t\tdest := y1 * stride\n\t\tsrc := y * stride\n\t\tcopy(row, pixels[dest:])\n\t\tcopy(pixels[dest:], pixels[src:src+len(row)])\n\t\tcopy(pixels[src:], row)\n\t}\n}\n\nfunc UploadImage(t Texture, offset image.Point, img *image.RGBA) {\n\tvar pixels []byte\n\tsize := img.Bounds().Size()\n\tmin := img.Rect.Min\n\tstart := img.PixOffset(min.X, min.Y)\n\tend := img.PixOffset(min.X+size.X, min.Y+size.Y-1)\n\tpixels = img.Pix[start:end]\n\tt.Upload(offset, size, pixels, img.Stride)\n}\n"
},
{
"path": "vendor/gioui.org/gpu/internal/metal/metal.go",
"content": "// SPDX-License-Identifier: Unlicense OR MIT\n\n// This file exists so this package builds on non-Darwin platforms.\n\npackage metal\n"
},
{
"path": "vendor/gioui.org/gpu/internal/metal/metal_darwin.go",
"content": "// SPDX-License-Identifier: Unlicense OR MIT\n\npackage metal\n\nimport (\n\t\"errors\"\n\t\"fmt\"\n\t\"image\"\n\t\"unsafe\"\n\n\t\"gioui.org/gpu/internal/driver\"\n\t\"gioui.org/shader\"\n)\n\n/*\n#cgo CFLAGS: -Werror -xobjective-c -fmodules -fobjc-arc\n#cgo LDFLAGS: -framework CoreGraphics\n\n@import Metal;\n\n#include \n#include \n\ntypedef struct {\n\tvoid *addr;\n\tNSUInteger size;\n} slice;\n\nstatic CFTypeRef queueNewBuffer(CFTypeRef queueRef) {\n\t@autoreleasepool {\n\t\tid queue = (__bridge id)queueRef;\n\t\treturn CFBridgingRetain([queue commandBuffer]);\n\t}\n}\n\nstatic void cmdBufferCommit(CFTypeRef cmdBufRef) {\n\t@autoreleasepool {\n\t\tid cmdBuf = (__bridge id)cmdBufRef;\n\t\t[cmdBuf commit];\n\t}\n}\n\nstatic void cmdBufferWaitUntilCompleted(CFTypeRef cmdBufRef) {\n\t@autoreleasepool {\n\t\tid cmdBuf = (__bridge id)cmdBufRef;\n\t\t[cmdBuf waitUntilCompleted];\n\t}\n}\n\nstatic CFTypeRef cmdBufferRenderEncoder(CFTypeRef cmdBufRef, CFTypeRef textureRef, MTLLoadAction act, float r, float g, float b, float a) {\n\t@autoreleasepool {\n\t\tid cmdBuf = (__bridge id)cmdBufRef;\n\t\tMTLRenderPassDescriptor *desc = [MTLRenderPassDescriptor new];\n\t\tdesc.colorAttachments[0].texture = (__bridge id)textureRef;\n\t\tdesc.colorAttachments[0].loadAction = act;\n\t\tdesc.colorAttachments[0].clearColor = MTLClearColorMake(r, g, b, a);\n\t\treturn CFBridgingRetain([cmdBuf renderCommandEncoderWithDescriptor:desc]);\n\t}\n}\n\nstatic CFTypeRef cmdBufferComputeEncoder(CFTypeRef cmdBufRef) {\n\t@autoreleasepool {\n\t\tid cmdBuf = (__bridge id)cmdBufRef;\n\t\treturn CFBridgingRetain([cmdBuf computeCommandEncoder]);\n\t}\n}\n\nstatic CFTypeRef cmdBufferBlitEncoder(CFTypeRef cmdBufRef) {\n\t@autoreleasepool {\n\t\tid cmdBuf = (__bridge id)cmdBufRef;\n\t\treturn CFBridgingRetain([cmdBuf blitCommandEncoder]);\n\t}\n}\n\nstatic void renderEncEnd(CFTypeRef renderEncRef) {\n\t@autoreleasepool {\n\t\tid enc = (__bridge id)renderEncRef;\n\t\t[enc endEncoding];\n\t}\n}\n\nstatic void renderEncViewport(CFTypeRef renderEncRef, MTLViewport viewport) {\n\t@autoreleasepool {\n\t\tid enc = (__bridge id)renderEncRef;\n\t\t[enc setViewport:viewport];\n\t}\n}\n\nstatic void renderEncSetFragmentTexture(CFTypeRef renderEncRef, NSUInteger index, CFTypeRef texRef) {\n\t@autoreleasepool {\n\t\tid enc = (__bridge id)renderEncRef;\n\t\tid tex = (__bridge id)texRef;\n\t\t[enc setFragmentTexture:tex atIndex:index];\n\t}\n}\n\nstatic void renderEncSetFragmentSamplerState(CFTypeRef renderEncRef, NSUInteger index, CFTypeRef samplerRef) {\n\t@autoreleasepool {\n\t\tid enc = (__bridge id)renderEncRef;\n\t\tid sampler = (__bridge id)samplerRef;\n\t\t[enc setFragmentSamplerState:sampler atIndex:index];\n\t}\n}\n\nstatic void renderEncSetVertexBuffer(CFTypeRef renderEncRef, CFTypeRef bufRef, NSUInteger idx, NSUInteger offset) {\n\t@autoreleasepool {\n\t\tid enc = (__bridge id)renderEncRef;\n\t\tid buf = (__bridge id)bufRef;\n\t\t[enc setVertexBuffer:buf offset:offset atIndex:idx];\n\t}\n}\n\nstatic void renderEncSetFragmentBuffer(CFTypeRef renderEncRef, CFTypeRef bufRef, NSUInteger idx, NSUInteger offset) {\n\t@autoreleasepool {\n\t\tid enc = (__bridge id)renderEncRef;\n\t\tid buf = (__bridge id)bufRef;\n\t\t[enc setFragmentBuffer:buf offset:offset atIndex:idx];\n\t}\n}\n\nstatic void renderEncSetFragmentBytes(CFTypeRef renderEncRef, const void *bytes, NSUInteger length, NSUInteger idx) {\n\t@autoreleasepool {\n\t\tid enc = (__bridge id)renderEncRef;\n\t\t[enc setFragmentBytes:bytes length:length atIndex:idx];\n\t}\n}\n\nstatic void renderEncSetVertexBytes(CFTypeRef renderEncRef, const void *bytes, NSUInteger length, NSUInteger idx) {\n\t@autoreleasepool {\n\t\tid enc = (__bridge id)renderEncRef;\n\t\t[enc setVertexBytes:bytes length:length atIndex:idx];\n\t}\n}\n\nstatic void renderEncSetRenderPipelineState(CFTypeRef renderEncRef, CFTypeRef pipeRef) {\n\t@autoreleasepool {\n\t\tid enc = (__bridge id)renderEncRef;\n\t\tid pipe = (__bridge id)pipeRef;\n\t\t[enc setRenderPipelineState:pipe];\n\t}\n}\n\nstatic void renderEncDrawPrimitives(CFTypeRef renderEncRef, MTLPrimitiveType type, NSUInteger start, NSUInteger count) {\n\t@autoreleasepool {\n\t\tid enc = (__bridge id)renderEncRef;\n\t\t[enc drawPrimitives:type vertexStart:start vertexCount:count];\n\t}\n}\n\nstatic void renderEncDrawIndexedPrimitives(CFTypeRef renderEncRef, MTLPrimitiveType type, CFTypeRef bufRef, NSUInteger offset, NSUInteger count) {\n\t@autoreleasepool {\n\t\tid enc = (__bridge id)renderEncRef;\n\t\tid buf = (__bridge id)bufRef;\n\t\t[enc drawIndexedPrimitives:type indexCount:count indexType:MTLIndexTypeUInt16 indexBuffer:buf indexBufferOffset:offset];\n\t}\n}\n\nstatic void computeEncSetPipeline(CFTypeRef computeEncRef, CFTypeRef pipeRef) {\n\t@autoreleasepool {\n\t\tid enc = (__bridge id)computeEncRef;\n\t\tid pipe = (__bridge id)pipeRef;\n\t\t[enc setComputePipelineState:pipe];\n\t}\n}\n\nstatic void computeEncSetTexture(CFTypeRef computeEncRef, NSUInteger index, CFTypeRef texRef) {\n\t@autoreleasepool {\n\t\tid enc = (__bridge id)computeEncRef;\n\t\tid tex = (__bridge id)texRef;\n\t\t[enc setTexture:tex atIndex:index];\n\t}\n}\n\nstatic void computeEncEnd(CFTypeRef computeEncRef) {\n\t@autoreleasepool {\n\t\tid enc = (__bridge id)computeEncRef;\n\t\t[enc endEncoding];\n\t}\n}\n\nstatic void computeEncSetBuffer(CFTypeRef computeEncRef, NSUInteger index, CFTypeRef bufRef) {\n\t@autoreleasepool {\n\t\tid enc = (__bridge id)computeEncRef;\n\t\tid buf = (__bridge id)bufRef;\n\t\t[enc setBuffer:buf offset:0 atIndex:index];\n\t}\n}\n\nstatic void computeEncDispatch(CFTypeRef computeEncRef, MTLSize threadgroupsPerGrid, MTLSize threadsPerThreadgroup) {\n\t@autoreleasepool {\n\t\tid enc = (__bridge id)computeEncRef;\n\t\t[enc dispatchThreadgroups:threadgroupsPerGrid threadsPerThreadgroup:threadsPerThreadgroup];\n\t}\n}\n\nstatic void computeEncSetBytes(CFTypeRef computeEncRef, const void *bytes, NSUInteger length, NSUInteger index) {\n\t@autoreleasepool {\n\t\tid enc = (__bridge id)computeEncRef;\n\t\t[enc setBytes:bytes length:length atIndex:index];\n\t}\n}\n\nstatic void blitEncEnd(CFTypeRef blitEncRef) {\n\t@autoreleasepool {\n\t\tid enc = (__bridge id)blitEncRef;\n\t\t[enc endEncoding];\n\t}\n}\n\nstatic void blitEncCopyFromTexture(CFTypeRef blitEncRef, CFTypeRef srcRef, MTLOrigin srcOrig, MTLSize srcSize, CFTypeRef dstRef, MTLOrigin dstOrig) {\n\t@autoreleasepool {\n\t\tid enc = (__bridge id)blitEncRef;\n\t\tid src = (__bridge id)srcRef;\n\t\tid dst = (__bridge id)dstRef;\n\t\t[enc copyFromTexture:src\n\t\t\t\t sourceSlice:0\n\t\t\t\t sourceLevel:0\n\t\t\t sourceOrigin:srcOrig\n\t\t\t\t sourceSize:srcSize\n\t\t\t\t toTexture:dst\n\t\t\tdestinationSlice:0\n\t\t\tdestinationLevel:0\n\t\t destinationOrigin:dstOrig];\n\t}\n}\n\nstatic void blitEncCopyBufferToTexture(CFTypeRef blitEncRef, CFTypeRef bufRef, CFTypeRef texRef, NSUInteger offset, NSUInteger stride, NSUInteger length, MTLSize dims, MTLOrigin orig) {\n\t@autoreleasepool {\n\t\tid enc = (__bridge id)blitEncRef;\n\t\tid src = (__bridge id)bufRef;\n\t\tid dst = (__bridge id)texRef;\n\t\t[enc copyFromBuffer:src\n\t\t\t sourceOffset:offset\n\t\t sourceBytesPerRow:stride\n\t\tsourceBytesPerImage:length\n\t\t\t\t sourceSize:dims\n\t\t\t\t toTexture:dst\n\t\t destinationSlice:0\n\t\t destinationLevel:0\n\t\t destinationOrigin:orig];\n\t}\n}\n\nstatic void blitEncCopyTextureToBuffer(CFTypeRef blitEncRef, CFTypeRef texRef, CFTypeRef bufRef, NSUInteger offset, NSUInteger stride, NSUInteger length, MTLSize dims, MTLOrigin orig) {\n\t@autoreleasepool {\n\t\tid enc = (__bridge id)blitEncRef;\n\t\tid src = (__bridge id)texRef;\n\t\tid dst = (__bridge id)bufRef;\n\t\t[enc\t\t copyFromTexture:src\n\t\t\t\t\t\t sourceSlice:0\n\t\t\t\t\t\t sourceLevel:0\n\t\t\t\t\t\tsourceOrigin:orig\n\t\t\t\t\t\t sourceSize:dims\n\t\t\t\t\t\t\ttoBuffer:dst\n\t\t\t\t destinationOffset:offset\n\t\t\t destinationBytesPerRow:stride\n\t\t\tdestinationBytesPerImage:length];\n\t}\n}\n\nstatic void blitEncCopyBufferToBuffer(CFTypeRef blitEncRef, CFTypeRef srcRef, CFTypeRef dstRef, NSUInteger srcOff, NSUInteger dstOff, NSUInteger size) {\n\t@autoreleasepool {\n\t\tid enc = (__bridge id)blitEncRef;\n\t\tid src = (__bridge id)srcRef;\n\t\tid dst = (__bridge id)dstRef;\n\t\t[enc copyFromBuffer:src\n\t\t\t\t sourceOffset:srcOff\n\t\t\t\t\t toBuffer:dst\n\t\t\tdestinationOffset:dstOff\n\t\t\t\t\t\t size:size];\n\t}\n}\n\nstatic CFTypeRef newTexture(CFTypeRef devRef, NSUInteger width, NSUInteger height, MTLPixelFormat format, MTLTextureUsage usage) {\n\t@autoreleasepool {\n\t\tid dev = (__bridge id)devRef;\n\t\tMTLTextureDescriptor *mtlDesc = [MTLTextureDescriptor texture2DDescriptorWithPixelFormat: format\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t width: width\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t height: height\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t \t mipmapped: NO];\n\t\tmtlDesc.usage = usage;\n\t\tmtlDesc.storageMode = MTLStorageModePrivate;\n\t\treturn CFBridgingRetain([dev newTextureWithDescriptor:mtlDesc]);\n\t}\n}\n\nstatic CFTypeRef newSampler(CFTypeRef devRef, MTLSamplerMinMagFilter minFilter, MTLSamplerMinMagFilter magFilter) {\n\t@autoreleasepool {\n\t\tid dev = (__bridge id)devRef;\n\t\tMTLSamplerDescriptor *desc = [MTLSamplerDescriptor new];\n\t\tdesc.minFilter = minFilter;\n\t\tdesc.magFilter = magFilter;\n\t\treturn CFBridgingRetain([dev newSamplerStateWithDescriptor:desc]);\n\t}\n}\n\nstatic CFTypeRef newBuffer(CFTypeRef devRef, NSUInteger size, MTLResourceOptions opts) {\n\t@autoreleasepool {\n\t\tid dev = (__bridge id)devRef;\n\t\tid buf = [dev newBufferWithLength:size\n\t\t\t\t\t\t\t\t\t\t\t options:opts];\n\t\treturn CFBridgingRetain(buf);\n\t}\n}\n\nstatic slice bufferContents(CFTypeRef bufRef) {\n\t@autoreleasepool {\n\t\tid buf = (__bridge id)bufRef;\n\t\tslice s = {.addr = [buf contents], .size = [buf length]};\n\t\treturn s;\n\t}\n}\n\nstatic CFTypeRef newLibrary(CFTypeRef devRef, char *name, void *mtllib, size_t size) {\n\t@autoreleasepool {\n\t\tid dev = (__bridge id)devRef;\n\t\tdispatch_data_t data = dispatch_data_create(mtllib, size, DISPATCH_TARGET_QUEUE_DEFAULT, DISPATCH_DATA_DESTRUCTOR_DEFAULT);\n\t\tid lib = [dev newLibraryWithData:data error:nil];\n\t\tlib.label = [NSString stringWithUTF8String:name];\n\t\treturn CFBridgingRetain(lib);\n\t}\n}\n\nstatic CFTypeRef libraryNewFunction(CFTypeRef libRef, char *funcName) {\n\t@autoreleasepool {\n\t\tid lib = (__bridge id)libRef;\n\t\tNSString *name = [NSString stringWithUTF8String:funcName];\n\t\treturn CFBridgingRetain([lib newFunctionWithName:name]);\n\t}\n}\n\nstatic CFTypeRef newComputePipeline(CFTypeRef devRef, CFTypeRef funcRef) {\n\t@autoreleasepool {\n\t\tid dev = (__bridge id)devRef;\n\t\tid func = (__bridge id![](\"https://raw.githubusercontent.com/noisetorch/NoiseTorch/master/assets/icon/noisetorch.png\"){kind=icon}