Repository: lykhonis/image_crop Branch: master Commit: 5809167dd7fa Files: 61 Total size: 128.0 KB Directory structure: gitextract_s2uz68ra/ ├── .github/ │ └── FUNDING.yml ├── .gitignore ├── .vscode/ │ └── launch.json ├── CHANGELOG.md ├── LICENSE ├── README.md ├── RELEASE.md ├── android/ │ ├── .gitignore │ ├── build.gradle │ ├── gradle/ │ │ └── wrapper/ │ │ ├── gradle-wrapper.jar │ │ └── gradle-wrapper.properties │ ├── gradle.properties │ ├── gradlew │ ├── gradlew.bat │ ├── settings.gradle │ └── src/ │ └── main/ │ ├── AndroidManifest.xml │ └── java/ │ └── com/ │ └── lykhonis/ │ └── imagecrop/ │ └── ImageCropPlugin.java ├── example/ │ ├── .gitignore │ ├── README.md │ ├── android/ │ │ ├── app/ │ │ │ ├── build.gradle │ │ │ └── src/ │ │ │ └── main/ │ │ │ ├── AndroidManifest.xml │ │ │ ├── java/ │ │ │ │ └── com/ │ │ │ │ └── lykhonis/ │ │ │ │ └── imagecropexample/ │ │ │ │ └── MainActivity.java │ │ │ └── res/ │ │ │ ├── drawable/ │ │ │ │ └── launch_background.xml │ │ │ └── values/ │ │ │ └── styles.xml │ │ ├── build.gradle │ │ ├── gradle/ │ │ │ └── wrapper/ │ │ │ └── gradle-wrapper.properties │ │ ├── gradle.properties │ │ └── settings.gradle │ ├── ios/ │ │ ├── Flutter/ │ │ │ ├── .last_build_id │ │ │ ├── AppFrameworkInfo.plist │ │ │ ├── Debug.xcconfig │ │ │ ├── Flutter.podspec │ │ │ └── Release.xcconfig │ │ ├── Podfile │ │ ├── Runner/ │ │ │ ├── AppDelegate.h │ │ │ ├── AppDelegate.m │ │ │ ├── Assets.xcassets/ │ │ │ │ ├── AppIcon.appiconset/ │ │ │ │ │ └── Contents.json │ │ │ │ └── LaunchImage.imageset/ │ │ │ │ ├── Contents.json │ │ │ │ └── README.md │ │ │ ├── Base.lproj/ │ │ │ │ ├── LaunchScreen.storyboard │ │ │ │ └── Main.storyboard │ │ │ ├── Info.plist │ │ │ └── main.m │ │ ├── Runner.xcodeproj/ │ │ │ ├── project.pbxproj │ │ │ ├── project.xcworkspace/ │ │ │ │ └── contents.xcworkspacedata.xml │ │ │ └── xcshareddata/ │ │ │ └── xcschemes/ │ │ │ └── Runner.xcscheme.xml │ │ └── Runner.xcworkspace/ │ │ ├── contents.xcworkspacedata │ │ ├── contents.xcworkspacedata.xml │ │ └── xcshareddata/ │ │ ├── IDEWorkspaceChecks.plist │ │ └── WorkspaceSettings.xcsettings.xml │ ├── lib/ │ │ └── main.dart │ └── pubspec.yaml ├── ios/ │ ├── .gitignore │ ├── Assets/ │ │ └── .gitkeep │ ├── Classes/ │ │ ├── ImageCropPlugin.h │ │ └── ImageCropPlugin.m │ └── image_crop.podspec ├── lib/ │ ├── image_crop.dart │ └── src/ │ ├── crop.dart │ └── image_crop.dart └── pubspec.yaml ================================================ FILE CONTENTS ================================================ ================================================ FILE: .github/FUNDING.yml ================================================ # These are supported funding model platforms github: VolodymyrLykhonis ================================================ FILE: .gitignore ================================================ .DS_Store .dart_tool/ .packages .pub/ pubspec.lock .idea/ *.iml build/ example/.flutter-plugins-dependencies example/ios/Flutter/flutter_export_environment.sh ================================================ FILE: .vscode/launch.json ================================================ { // Use IntelliSense to learn about possible attributes. // Hover to view descriptions of existing attributes. // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387 "version": "0.2.0", "configurations": [ { "name": "Example", "request": "launch", "type": "dart", "program": "${workspaceFolder}/example/lib/main.dart" } ] } ================================================ FILE: CHANGELOG.md ================================================ ## 0.4.1 Community Contributions. Thank you! * Dart 2.17 #89 (#91) * Fixed a few typos (#87) * Resolve #40 (#81) ## 0.4.0 * adds null safety ## 0.3.4 * fixes several issues related to scaling and multi-touch support ## 0.3.3 * migrate to the new Android APIs based on FlutterPlugin ## 0.3.2 * Fixes #33. Image rotation bug after cropping on iOS * Flutter upgrade v1.13.5 ## 0.3.1 * Fixes #19. Painting of the image is independent of top/left handles * Visual correction of a grid. It was tilted by 1 point ## 0.3.0 * Android gradle upgrade to 3.4.1. Gradle 5.1.1 * Flutter upgrade 1.6.6 * Android target SDK 28 ## 0.2.1 * Read exif information to provide proper width/height according to the orientation * Rotate image prior cropping as needed per exif information ## 0.2.0 * Fit sampled images to specified maximum width/height on both iOS and Android * Preserve exif information on Android when crop/sample image * Updated example to illustrate higher quality cropped image production ## 0.1.3 * New widget options: Maximum scale, always show grid * Adjusted scale to reflect original image size. If image scaled and fits in cropped area, scale is 1x * Calculate sample size against large side of image to match smaller to preferred width/height * Bug: ensure to display image on first frame * Optimization: do not resample if image is smaller than preferred width/height ## 0.1.2 * Limit image to a crop area instead of view boundaries * Don't adjust a size during scale to avoid misalignment * After editing snap image back to a crop area. Auto scale if needed ## 0.1.1 * Fixed an exception when aspect ratio is not supplied * Updated README with more information and screenshots ## 0.1.0 * Tools to resample by a factor, crop, and get options of images * Display image provider * Scale and crop image via widget * Optional aspect ratio of crop area ================================================ FILE: LICENSE ================================================ Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. Definitions. "License" shall mean the terms and conditions for use, reproduction, and distribution as defined by Sections 1 through 9 of this document. "Licensor" shall mean the copyright owner or entity authorized by the copyright owner that is granting the License. "Legal Entity" shall mean the union of the acting entity and all other entities that control, are controlled by, or are under common control with that entity. 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While redistributing the Work or Derivative Works thereof, You may choose to offer, and charge a fee for, acceptance of support, warranty, indemnity, or other liability obligations and/or rights consistent with this License. However, in accepting such obligations, You may act only on Your own behalf and on Your sole responsibility, not on behalf of any other Contributor, and only if You agree to indemnify, defend, and hold each Contributor harmless for any liability incurred by, or claims asserted against, such Contributor by reason of your accepting any such warranty or additional liability. END OF TERMS AND CONDITIONS APPENDIX: How to apply the Apache License to your work. To apply the Apache License to your work, attach the following boilerplate notice, with the fields enclosed by brackets "[]" replaced with your own identifying information. (Don't include the brackets!) The text should be enclosed in the appropriate comment syntax for the file format. We also recommend that a file or class name and description of purpose be included on the same "printed page" as the copyright notice for easier identification within third-party archives. Copyright 2018 Volodymyr Lykhonis Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. ================================================ FILE: README.md ================================================ # Image Cropping plugin for Flutter A flutter plugin to crop image on iOS and Android. ![Image Cropping Preview](assets/image_cropping_preview.gif) The plugin comes with a `Crop` widget. The widget renders only image, overlay, and handles to crop an image. Thus it can be composed with other widgets to build custom image cropping experience. The plugin is working with files to avoid passing large amount of data through method channels. Files are stored in cache folders of iOS and Android. Thus if there is a need to save actual cropped image, ensure to copy the file to other location. All of the computation intensive work is done off a main thread via dispatch queues on iOS and cache thread pool on Android. *Note*: This plugin is still under development, some features are not available yet and testing has been limited. ## Installation Add `image_crop` [![image_crop](https://img.shields.io/pub/v/image_crop.svg)](https://pub.dartlang.org/packages/image_crop) as [a dependency in `pubspec.yaml`](https://flutter.io/using-packages/#managing-package-dependencies--versions). ## Using Create a widget to load and edit an image: ```dart final cropKey = GlobalKey(); Widget _buildCropImage() { return Container( color: Colors.black, padding: const EdgeInsets.all(20.0), child: Crop( key: cropKey, image: Image.file(imageFile), aspectRatio: 4.0 / 3.0, ), ); } ``` Access cropping values: - scale is a factor to proportionally scale image's width and height when cropped. `1.0` is no scale needed. - area is a rectangle indicating fractional positions on the image to crop from. ```dart final crop = cropKey.currentState; // or // final crop = Crop.of(context); final scale = crop.scale; final area = crop.area; if (area == null) { // cannot crop, widget is not setup // ... } ``` Accessing and working with images. As a convenience function to request permissions to access photos. ```dart final permissionsGranted = await ImageCrop.requestPermissions(); ``` Read image options, such as: width and height. This is efficient implementation that does not decode nor load actual image into a memory. ```dart final options = await getImageOptions(file: file); debugPrint('image width: ${options.width}, height: ${options.height}'); ``` If a large image is to be loaded into the memory, there is a sampling function that relies on a native platform to proportionally scale down the image before loading it to the memory. e.g. resample image to get down to `1024x4096` dimension as close as possible. If it is a square `preferredSize` can be used to specify both width and height. Prefer to leverage this functionality when displaying images in UI. ```dart final sampleFile = await ImageCrop.sampleImage( file: originalFile, preferredWidth: 1024, preferredHeight: 4096, ); ``` Once `Crop` widget is ready, there is a native support of cropping and scaling an image. In order to produce higher quality cropped image, rely on sampling image with preferred maximum width and height. Scale up a resolution of the sampled image. When cropped, the image is in higher resolution. Example is illustrated below: ```dart final sampledFile = await ImageCrop.sampleImage( file: originalFile, preferredWidth: (1024 / crop.scale).round(), preferredHeight: (4096 / crop.scale).round(), ); final croppedFile = await ImageCrop.cropImage( file: sampledFile, area: crop.area, ); ``` ================================================ FILE: RELEASE.md ================================================ ## Prepare for Release Version format is `v{major}.{minor}.{patch}`. e.g. `v0.1.1`. 1. Do `flutter analyze`. Ensure no issues found! 2. Do `flutter format lib/`. Format all dart code. 3. Update `pubsec.yaml` with new version. 4. Update `CHANGELOG.md` with new version and add details describing what's new and/or changed. 5. Do `flutter packages pub publish --dry-run`. Check to ensure there are no warnings! 6. Do `git commit -am "{version}"`. 7. Do `git tag {version}`. 8. Do `flutter packages pub publish` to publish new version. 9. Push changes `git push && git push --tags` ================================================ FILE: android/.gitignore ================================================ *.iml .gradle /local.properties /.idea/workspace.xml /.idea/libraries .DS_Store /build /captures ================================================ FILE: android/build.gradle ================================================ group 'com.lykhonis.imagecrop' version '1.0-SNAPSHOT' buildscript { repositories { google() jcenter() } dependencies { classpath 'com.android.tools.build:gradle:3.4.1' } } rootProject.allprojects { repositories { google() jcenter() } } apply plugin: 'com.android.library' android { compileSdkVersion 28 defaultConfig { minSdkVersion 16 testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner" } lintOptions { disable 'InvalidPackage' } } dependencies { implementation 'androidx.exifinterface:exifinterface:1.0.0' } ================================================ FILE: android/gradle/wrapper/gradle-wrapper.properties ================================================ #Sat Jun 01 05:18:58 PDT 2019 distributionBase=GRADLE_USER_HOME distributionPath=wrapper/dists zipStoreBase=GRADLE_USER_HOME zipStorePath=wrapper/dists distributionUrl=https\://services.gradle.org/distributions/gradle-5.1.1-all.zip ================================================ FILE: android/gradle.properties ================================================ org.gradle.jvmargs=-Xmx1536M ================================================ FILE: android/gradlew ================================================ #!/usr/bin/env sh ############################################################################## ## ## Gradle start up script for UN*X ## ############################################################################## # Attempt to set APP_HOME # Resolve links: $0 may be a link PRG="$0" # Need this for relative symlinks. while [ -h "$PRG" ] ; do ls=`ls -ld "$PRG"` link=`expr "$ls" : '.*-> \(.*\)$'` if expr "$link" : '/.*' > /dev/null; then PRG="$link" else PRG=`dirname "$PRG"`"/$link" fi done SAVED="`pwd`" cd "`dirname \"$PRG\"`/" >/dev/null APP_HOME="`pwd -P`" cd "$SAVED" >/dev/null APP_NAME="Gradle" APP_BASE_NAME=`basename "$0"` # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. DEFAULT_JVM_OPTS="" # Use the maximum available, or set MAX_FD != -1 to use that value. MAX_FD="maximum" warn () { echo "$*" } die () { echo echo "$*" echo exit 1 } # OS specific support (must be 'true' or 'false'). cygwin=false msys=false darwin=false nonstop=false case "`uname`" in CYGWIN* ) cygwin=true ;; Darwin* ) darwin=true ;; MINGW* ) msys=true ;; NONSTOP* ) nonstop=true ;; esac CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar # Determine the Java command to use to start the JVM. if [ -n "$JAVA_HOME" ] ; then if [ -x "$JAVA_HOME/jre/sh/java" ] ; then # IBM's JDK on AIX uses strange locations for the executables JAVACMD="$JAVA_HOME/jre/sh/java" else JAVACMD="$JAVA_HOME/bin/java" fi if [ ! -x "$JAVACMD" ] ; then die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME Please set the JAVA_HOME variable in your environment to match the location of your Java installation." fi else JAVACMD="java" which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. Please set the JAVA_HOME variable in your environment to match the location of your Java installation." fi # Increase the maximum file descriptors if we can. if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then MAX_FD_LIMIT=`ulimit -H -n` if [ $? -eq 0 ] ; then if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then MAX_FD="$MAX_FD_LIMIT" fi ulimit -n $MAX_FD if [ $? -ne 0 ] ; then warn "Could not set maximum file descriptor limit: $MAX_FD" fi else warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" fi fi # For Darwin, add options to specify how the application appears in the dock if $darwin; then GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" fi # For Cygwin, switch paths to Windows format before running java if $cygwin ; then APP_HOME=`cygpath --path --mixed "$APP_HOME"` CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` JAVACMD=`cygpath --unix "$JAVACMD"` # We build the pattern for arguments to be converted via cygpath ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` SEP="" for dir in $ROOTDIRSRAW ; do ROOTDIRS="$ROOTDIRS$SEP$dir" SEP="|" done OURCYGPATTERN="(^($ROOTDIRS))" # Add a user-defined pattern to the cygpath arguments if [ "$GRADLE_CYGPATTERN" != "" ] ; then OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" fi # Now convert the arguments - kludge to limit ourselves to /bin/sh i=0 for arg in "$@" ; do CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` else eval `echo args$i`="\"$arg\"" fi i=$((i+1)) done case $i in (0) set -- ;; (1) set -- "$args0" ;; (2) set -- "$args0" "$args1" ;; (3) set -- "$args0" "$args1" "$args2" ;; (4) set -- "$args0" "$args1" "$args2" "$args3" ;; (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; esac fi # Escape application args save () { for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done echo " " } APP_ARGS=$(save "$@") # Collect all arguments for the java command, following the shell quoting and substitution rules eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS" # by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then cd "$(dirname "$0")" fi exec "$JAVACMD" "$@" ================================================ FILE: android/gradlew.bat ================================================ @if "%DEBUG%" == "" @echo off @rem ########################################################################## @rem @rem Gradle startup script for Windows @rem @rem ########################################################################## @rem Set local scope for the variables with windows NT shell if "%OS%"=="Windows_NT" setlocal set DIRNAME=%~dp0 if "%DIRNAME%" == "" set DIRNAME=. set APP_BASE_NAME=%~n0 set APP_HOME=%DIRNAME% @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. set DEFAULT_JVM_OPTS= @rem Find java.exe if defined JAVA_HOME goto findJavaFromJavaHome set JAVA_EXE=java.exe %JAVA_EXE% -version >NUL 2>&1 if "%ERRORLEVEL%" == "0" goto init echo. echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. echo. echo Please set the JAVA_HOME variable in your environment to match the echo location of your Java installation. goto fail :findJavaFromJavaHome set JAVA_HOME=%JAVA_HOME:"=% set JAVA_EXE=%JAVA_HOME%/bin/java.exe if exist "%JAVA_EXE%" goto init echo. echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% echo. echo Please set the JAVA_HOME variable in your environment to match the echo location of your Java installation. goto fail :init @rem Get command-line arguments, handling Windows variants if not "%OS%" == "Windows_NT" goto win9xME_args :win9xME_args @rem Slurp the command line arguments. set CMD_LINE_ARGS= set _SKIP=2 :win9xME_args_slurp if "x%~1" == "x" goto execute set CMD_LINE_ARGS=%* :execute @rem Setup the command line set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar @rem Execute Gradle "%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS% :end @rem End local scope for the variables with windows NT shell if "%ERRORLEVEL%"=="0" goto mainEnd :fail rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of rem the _cmd.exe /c_ return code! if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 exit /b 1 :mainEnd if "%OS%"=="Windows_NT" endlocal :omega ================================================ FILE: android/settings.gradle ================================================ rootProject.name = 'image_crop' ================================================ FILE: android/src/main/AndroidManifest.xml ================================================ ================================================ FILE: android/src/main/java/com/lykhonis/imagecrop/ImageCropPlugin.java ================================================ package com.lykhonis.imagecrop; import android.app.Activity; import android.content.pm.PackageManager; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Matrix; import android.graphics.Paint; import android.graphics.Rect; import android.graphics.RectF; import android.os.Build; import android.util.Log; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.OutputStream; import java.util.Arrays; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.UUID; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import androidx.annotation.NonNull; import androidx.exifinterface.media.ExifInterface; import io.flutter.plugin.common.BinaryMessenger; import io.flutter.plugin.common.MethodCall; import io.flutter.plugin.common.MethodChannel; import io.flutter.plugin.common.MethodChannel.MethodCallHandler; import io.flutter.plugin.common.MethodChannel.Result; import io.flutter.plugin.common.PluginRegistry; import io.flutter.plugin.common.PluginRegistry.Registrar; import io.flutter.embedding.engine.plugins.FlutterPlugin; import io.flutter.embedding.engine.plugins.activity.ActivityAware; import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding; import static android.Manifest.permission.READ_EXTERNAL_STORAGE; import static android.Manifest.permission.WRITE_EXTERNAL_STORAGE; public final class ImageCropPlugin implements FlutterPlugin , ActivityAware, MethodCallHandler, PluginRegistry.RequestPermissionsResultListener { private static final int PERMISSION_REQUEST_CODE = 13094; private MethodChannel channel; private ActivityPluginBinding binding; private Activity activity; private Result permissionRequestResult; private ExecutorService executor; private ImageCropPlugin(Activity activity) { this.activity = activity; } public ImageCropPlugin(){ } /** * legacy APIs */ public static void registerWith(Registrar registrar) { ImageCropPlugin instance = new ImageCropPlugin(registrar.activity()); instance.setup(registrar.messenger()); registrar.addRequestPermissionsResultListener(instance); } @Override public void onAttachedToEngine(@NonNull FlutterPluginBinding binding) { this.setup(binding.getBinaryMessenger()); } @Override public void onDetachedFromEngine(@NonNull FlutterPluginBinding binding) { channel.setMethodCallHandler(null); channel = null; } @Override public void onAttachedToActivity(ActivityPluginBinding activityPluginBinding) { binding = activityPluginBinding; activity = activityPluginBinding.getActivity(); activityPluginBinding.addRequestPermissionsResultListener(this); } @Override public void onDetachedFromActivity() { activity = null; if(binding != null){ binding.removeRequestPermissionsResultListener(this); } } @Override public void onReattachedToActivityForConfigChanges(ActivityPluginBinding activityPluginBinding) { this.onAttachedToActivity(activityPluginBinding); } @Override public void onDetachedFromActivityForConfigChanges() { this.onDetachedFromActivity(); } private void setup(BinaryMessenger messenger) { channel = new MethodChannel(messenger, "plugins.lykhonis.com/image_crop"); channel.setMethodCallHandler(this); } @SuppressWarnings("ConstantConditions") @Override public void onMethodCall(MethodCall call, Result result) { if ("cropImage".equals(call.method)) { String path = call.argument("path"); double scale = call.argument("scale"); double left = call.argument("left"); double top = call.argument("top"); double right = call.argument("right"); double bottom = call.argument("bottom"); RectF area = new RectF((float) left, (float) top, (float) right, (float) bottom); cropImage(path, area, (float) scale, result); } else if ("sampleImage".equals(call.method)) { String path = call.argument("path"); int maximumWidth = call.argument("maximumWidth"); int maximumHeight = call.argument("maximumHeight"); sampleImage(path, maximumWidth, maximumHeight, result); } else if ("getImageOptions".equals(call.method)) { String path = call.argument("path"); getImageOptions(path, result); } else if ("requestPermissions".equals(call.method)) { requestPermissions(result); } else { result.notImplemented(); } } private synchronized void io(@NonNull Runnable runnable) { if (executor == null) { executor = Executors.newCachedThreadPool(); } executor.execute(runnable); } private void ui(@NonNull Runnable runnable) { activity.runOnUiThread(runnable); } private void cropImage(final String path, final RectF area, final float scale, final Result result) { io(new Runnable() { @Override public void run() { File srcFile = new File(path); if (!srcFile.exists()) { ui(new Runnable() { @Override public void run() { result.error("INVALID", "Image source cannot be opened", null); } }); return; } Bitmap srcBitmap = BitmapFactory.decodeFile(path, null); if (srcBitmap == null) { ui(new Runnable() { @Override public void run() { result.error("INVALID", "Image source cannot be decoded", null); } }); return; } ImageOptions options = decodeImageOptions(path); if (options.isFlippedDimensions()) { Matrix transformations = new Matrix(); transformations.postRotate(options.getDegrees()); Bitmap oldBitmap = srcBitmap; srcBitmap = Bitmap.createBitmap(oldBitmap, 0, 0, oldBitmap.getWidth(), oldBitmap.getHeight(), transformations, true); oldBitmap.recycle(); } int width = (int) (options.getWidth() * area.width() * scale); int height = (int) (options.getHeight() * area.height() * scale); Bitmap dstBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(dstBitmap); Paint paint = new Paint(); paint.setAntiAlias(true); paint.setFilterBitmap(true); paint.setDither(true); Rect srcRect = new Rect((int) (srcBitmap.getWidth() * area.left), (int) (srcBitmap.getHeight() * area.top), (int) (srcBitmap.getWidth() * area.right), (int) (srcBitmap.getHeight() * area.bottom)); Rect dstRect = new Rect(0, 0, width, height); canvas.drawBitmap(srcBitmap, srcRect, dstRect, paint); // TODO: Research a way to optimize rendering via matrix to reduce memory print. // Matrix transformations = new Matrix(); // transformations.mapRect(new RectF(0, 0, // options.getWidth(), options.getHeight())); // transformations.postTranslate(-options.getWidth() / 2f * area.left, // -options.getHeight() / 2f * area.top); // transformations.postRotate(options.getDegrees(), // options.getWidth() / 2f * area.width(), // options.getHeight() / 2f * area.height()); // canvas.drawBitmap(srcBitmap, transformations, paint); try { final File dstFile = createTemporaryImageFile(); compressBitmap(dstBitmap, dstFile); ui(new Runnable() { @Override public void run() { result.success(dstFile.getAbsolutePath()); } }); } catch (final IOException e) { ui(new Runnable() { @Override public void run() { result.error("INVALID", "Image could not be saved", e); } }); } finally { canvas.setBitmap(null); dstBitmap.recycle(); srcBitmap.recycle(); } } }); } private void sampleImage(final String path, final int maximumWidth, final int maximumHeight, final Result result) { io(new Runnable() { @Override public void run() { File srcFile = new File(path); if (!srcFile.exists()) { ui(new Runnable() { @Override public void run() { result.error("INVALID", "Image source cannot be opened", null); } }); return; } ImageOptions options = decodeImageOptions(path); BitmapFactory.Options bitmapOptions = new BitmapFactory.Options(); bitmapOptions.inSampleSize = calculateInSampleSize(options.getWidth(), options.getHeight(), maximumWidth, maximumHeight); Bitmap bitmap = BitmapFactory.decodeFile(path, bitmapOptions); if (bitmap == null) { ui(new Runnable() { @Override public void run() { result.error("INVALID", "Image source cannot be decoded", null); } }); return; } if (options.getWidth() > maximumWidth && options.getHeight() > maximumHeight) { float ratio = Math.max(maximumWidth / (float) options.getWidth(), maximumHeight / (float) options.getHeight()); Bitmap sample = bitmap; bitmap = Bitmap.createScaledBitmap(sample, Math.round(bitmap.getWidth() * ratio), Math.round(bitmap.getHeight() * ratio), true); sample.recycle(); } try { final File dstFile = createTemporaryImageFile(); compressBitmap(bitmap, dstFile); copyExif(srcFile, dstFile); ui(new Runnable() { @Override public void run() { result.success(dstFile.getAbsolutePath()); } }); } catch (final IOException e) { ui(new Runnable() { @Override public void run() { result.error("INVALID", "Image could not be saved", e); } }); } finally { bitmap.recycle(); } } }); } @SuppressWarnings("TryFinallyCanBeTryWithResources") private void compressBitmap(Bitmap bitmap, File file) throws IOException { OutputStream outputStream = new FileOutputStream(file); try { boolean compressed = bitmap.compress(Bitmap.CompressFormat.JPEG, 100, outputStream); if (!compressed) { throw new IOException("Failed to compress bitmap into JPEG"); } } finally { try { outputStream.close(); } catch (IOException ignore) { } } } private int calculateInSampleSize(int width, int height, int maximumWidth, int maximumHeight) { int inSampleSize = 1; if (height > maximumHeight || width > maximumWidth) { int halfHeight = height / 2; int halfWidth = width / 2; while ((halfHeight / inSampleSize) >= maximumHeight && (halfWidth / inSampleSize) >= maximumWidth) { inSampleSize *= 2; } } return inSampleSize; } private void getImageOptions(final String path, final Result result) { io(new Runnable() { @Override public void run() { File file = new File(path); if (!file.exists()) { result.error("INVALID", "Image source cannot be opened", null); return; } ImageOptions options = decodeImageOptions(path); final Map properties = new HashMap<>(); properties.put("width", options.getWidth()); properties.put("height", options.getHeight()); ui(new Runnable() { @Override public void run() { result.success(properties); } }); } }); } private void requestPermissions(Result result) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { if (activity.checkSelfPermission(READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED && activity.checkSelfPermission(WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) { result.success(true); } else { permissionRequestResult = result; activity.requestPermissions(new String[]{READ_EXTERNAL_STORAGE, WRITE_EXTERNAL_STORAGE}, PERMISSION_REQUEST_CODE); } } else { result.success(true); } } @Override public boolean onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) { if (requestCode == PERMISSION_REQUEST_CODE && permissionRequestResult != null) { int readExternalStorage = getPermissionGrantResult(READ_EXTERNAL_STORAGE, permissions, grantResults); int writeExternalStorage = getPermissionGrantResult(WRITE_EXTERNAL_STORAGE, permissions, grantResults); permissionRequestResult.success(readExternalStorage == PackageManager.PERMISSION_GRANTED && writeExternalStorage == PackageManager.PERMISSION_GRANTED); permissionRequestResult = null; } return false; } private int getPermissionGrantResult(String permission, String[] permissions, int[] grantResults) { for (int i = 0; i < permission.length(); i++) { if (permission.equals(permissions[i])) { return grantResults[i]; } } return PackageManager.PERMISSION_DENIED; } private File createTemporaryImageFile() throws IOException { File directory = activity.getCacheDir(); String name = "image_crop_" + UUID.randomUUID().toString(); return File.createTempFile(name, ".jpg", directory); } private ImageOptions decodeImageOptions(String path) { int rotationDegrees = 0; try { ExifInterface exif = new ExifInterface(path); rotationDegrees = exif.getRotationDegrees(); } catch (IOException e) { Log.e("ImageCrop", "Failed to read a file " + path, e); } BitmapFactory.Options options = new BitmapFactory.Options(); options.inJustDecodeBounds = true; BitmapFactory.decodeFile(path, options); return new ImageOptions(options.outWidth, options.outHeight, rotationDegrees); } private void copyExif(File source, File destination) { try { ExifInterface sourceExif = new ExifInterface(source.getAbsolutePath()); ExifInterface destinationExif = new ExifInterface(destination.getAbsolutePath()); List tags = Arrays.asList( ExifInterface.TAG_F_NUMBER, ExifInterface.TAG_EXPOSURE_TIME, ExifInterface.TAG_PHOTOGRAPHIC_SENSITIVITY, ExifInterface.TAG_GPS_ALTITUDE, ExifInterface.TAG_GPS_ALTITUDE_REF, ExifInterface.TAG_FOCAL_LENGTH, ExifInterface.TAG_GPS_DATESTAMP, ExifInterface.TAG_WHITE_BALANCE, ExifInterface.TAG_GPS_PROCESSING_METHOD, ExifInterface.TAG_GPS_TIMESTAMP, ExifInterface.TAG_DATETIME, ExifInterface.TAG_FLASH, ExifInterface.TAG_GPS_LATITUDE, ExifInterface.TAG_GPS_LATITUDE_REF, ExifInterface.TAG_GPS_LONGITUDE, ExifInterface.TAG_GPS_LONGITUDE_REF, ExifInterface.TAG_MAKE, ExifInterface.TAG_MODEL, ExifInterface.TAG_ORIENTATION); for (String tag : tags) { String attribute = sourceExif.getAttribute(tag); if (attribute != null) { destinationExif.setAttribute(tag, attribute); } } destinationExif.saveAttributes(); } catch (IOException e) { Log.e("ImageCrop", "Failed to preserve Exif information", e); } } private static final class ImageOptions { private final int width; private final int height; private final int degrees; ImageOptions(int width, int height, int degrees) { this.width = width; this.height = height; this.degrees = degrees; } int getHeight() { return (isFlippedDimensions() && degrees != 180) ? width : height; } int getWidth() { return (isFlippedDimensions() && degrees != 180) ? height : width; } int getDegrees() { return degrees; } boolean isFlippedDimensions() { return degrees == 90 || degrees == 270 || degrees == 180; } public boolean isRotated() { return degrees != 0; } } } ================================================ FILE: example/.gitignore ================================================ # Miscellaneous *.class *.lock *.log *.pyc *.swp .DS_Store .atom/ .buildlog/ .history .svn/ # IntelliJ related *.iml *.ipr *.iws .idea/ # Visual Studio Code related .vscode/ # Flutter/Dart/Pub related **/doc/api/ .dart_tool/ .flutter-plugins .packages .pub-cache/ .pub/ build/ # Android related **/android/**/gradle-wrapper.jar **/android/.gradle **/android/captures/ **/android/gradlew **/android/gradlew.bat **/android/local.properties **/android/**/GeneratedPluginRegistrant.java # iOS/XCode related **/ios/**/*.mode1v3 **/ios/**/*.mode2v3 **/ios/**/*.moved-aside **/ios/**/*.pbxuser **/ios/**/*.perspectivev3 **/ios/**/*sync/ **/ios/**/.sconsign.dblite **/ios/**/.tags* **/ios/**/.vagrant/ **/ios/**/DerivedData/ **/ios/**/Icon? **/ios/**/Pods/ **/ios/**/.symlinks/ **/ios/**/profile **/ios/**/xcuserdata **/ios/.generated/ **/ios/Flutter/App.framework **/ios/Flutter/Flutter.framework **/ios/Flutter/Generated.xcconfig **/ios/Flutter/app.flx **/ios/Flutter/app.zip **/ios/Flutter/flutter_assets/ **/ios/ServiceDefinitions.json **/ios/Runner/GeneratedPluginRegistrant.* # Exceptions to above rules. !**/ios/**/default.mode1v3 !**/ios/**/default.mode2v3 !**/ios/**/default.pbxuser !**/ios/**/default.perspectivev3 !/packages/flutter_tools/test/data/dart_dependencies_test/**/.packages ================================================ FILE: example/README.md ================================================ # image_crop_example Demonstrates how to use the image_crop plugin. ## Getting Started For help getting started with Flutter, view our online [documentation](https://flutter.io/). ================================================ FILE: example/android/app/build.gradle ================================================ def localProperties = new Properties() def localPropertiesFile = rootProject.file('local.properties') if (localPropertiesFile.exists()) { localPropertiesFile.withReader('UTF-8') { reader -> localProperties.load(reader) } } def flutterRoot = localProperties.getProperty('flutter.sdk') if (flutterRoot == null) { throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.") } def flutterVersionCode = localProperties.getProperty('flutter.versionCode') if (flutterVersionCode == null) { flutterVersionCode = '1' } def flutterVersionName = localProperties.getProperty('flutter.versionName') if (flutterVersionName == null) { flutterVersionName = '1.0' } apply plugin: 'com.android.application' apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle" android { compileSdkVersion 28 lintOptions { disable 'InvalidPackage' } defaultConfig { // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html). applicationId "com.lykhonis.imagecropexample" minSdkVersion 16 targetSdkVersion 28 versionCode flutterVersionCode.toInteger() versionName flutterVersionName testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" } buildTypes { release { // TODO: Add your own signing config for the release build. // Signing with the debug keys for now, so `flutter run --release` works. signingConfig signingConfigs.debug } } } flutter { source '../..' } dependencies { testImplementation 'junit:junit:4.12' androidTestImplementation 'com.android.support.test:runner:1.0.2' androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2' } ================================================ FILE: example/android/app/src/main/AndroidManifest.xml ================================================ ================================================ FILE: example/android/app/src/main/java/com/lykhonis/imagecropexample/MainActivity.java ================================================ package com.lykhonis.imagecropexample; import android.os.Bundle; import io.flutter.app.FlutterActivity; import io.flutter.plugins.GeneratedPluginRegistrant; public class MainActivity extends FlutterActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); GeneratedPluginRegistrant.registerWith(this); } } ================================================ FILE: example/android/app/src/main/res/drawable/launch_background.xml ================================================ ================================================ FILE: example/android/app/src/main/res/values/styles.xml ================================================ ================================================ FILE: example/android/build.gradle ================================================ buildscript { repositories { google() jcenter() } dependencies { classpath 'com.android.tools.build:gradle:3.4.1' } } allprojects { repositories { google() jcenter() } } rootProject.buildDir = '../build' subprojects { project.buildDir = "${rootProject.buildDir}/${project.name}" } subprojects { project.evaluationDependsOn(':app') } task clean(type: Delete) { delete rootProject.buildDir } ================================================ FILE: example/android/gradle/wrapper/gradle-wrapper.properties ================================================ #Sat Jun 01 05:20:09 PDT 2019 distributionBase=GRADLE_USER_HOME distributionPath=wrapper/dists zipStoreBase=GRADLE_USER_HOME zipStorePath=wrapper/dists distributionUrl=https\://services.gradle.org/distributions/gradle-5.1.1-all.zip ================================================ FILE: example/android/gradle.properties ================================================ org.gradle.jvmargs=-Xmx1536M ================================================ FILE: example/android/settings.gradle ================================================ include ':app' def flutterProjectRoot = rootProject.projectDir.parentFile.toPath() def plugins = new Properties() def pluginsFile = new File(flutterProjectRoot.toFile(), '.flutter-plugins') if (pluginsFile.exists()) { pluginsFile.withReader('UTF-8') { reader -> plugins.load(reader) } } plugins.each { name, path -> def pluginDirectory = flutterProjectRoot.resolve(path).resolve('android').toFile() include ":$name" project(":$name").projectDir = pluginDirectory } ================================================ FILE: example/ios/Flutter/.last_build_id ================================================ 96b858413dd1e970b76641c6cef4bcad ================================================ FILE: example/ios/Flutter/AppFrameworkInfo.plist ================================================ CFBundleDevelopmentRegion en CFBundleExecutable App CFBundleIdentifier io.flutter.flutter.app CFBundleInfoDictionaryVersion 6.0 CFBundleName App CFBundlePackageType FMWK CFBundleShortVersionString 1.0 CFBundleSignature ???? CFBundleVersion 1.0 MinimumOSVersion 9.0 ================================================ FILE: example/ios/Flutter/Debug.xcconfig ================================================ #include "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig" #include "Generated.xcconfig" ================================================ FILE: example/ios/Flutter/Flutter.podspec ================================================ # # NOTE: This podspec is NOT to be published. It is only used as a local source! # This is a generated file; do not edit or check into version control. # Pod::Spec.new do |s| s.name = 'Flutter' s.version = '1.0.0' s.summary = 'High-performance, high-fidelity mobile apps.' s.homepage = 'https://flutter.io' s.license = { :type => 'MIT' } s.author = { 'Flutter Dev Team' => 'flutter-dev@googlegroups.com' } s.source = { :git => 'https://github.com/flutter/engine', :tag => s.version.to_s } s.ios.deployment_target = '9.0' # Framework linking is handled by Flutter tooling, not CocoaPods. # Add a placeholder to satisfy `s.dependency 'Flutter'` plugin podspecs. s.vendored_frameworks = 'path/to/nothing' end ================================================ FILE: example/ios/Flutter/Release.xcconfig ================================================ #include "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig" #include "Generated.xcconfig" ================================================ FILE: example/ios/Podfile ================================================ # Uncomment this line to define a global platform for your project # platform :ios, '9.0' # CocoaPods analytics sends network stats synchronously affecting flutter build latency. ENV['COCOAPODS_DISABLE_STATS'] = 'true' project 'Runner', { 'Debug' => :debug, 'Profile' => :release, 'Release' => :release, } def flutter_root generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), __FILE__) unless File.exist?(generated_xcode_build_settings_path) raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure flutter pub get is executed first" end File.foreach(generated_xcode_build_settings_path) do |line| matches = line.match(/FLUTTER_ROOT\=(.*)/) return matches[1].strip if matches end raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Generated.xcconfig, then run flutter pub get" end require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root) flutter_ios_podfile_setup target 'Runner' do flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__)) end post_install do |installer| installer.pods_project.targets.each do |target| flutter_additional_ios_build_settings(target) end end ================================================ FILE: example/ios/Runner/AppDelegate.h ================================================ #import #import @interface AppDelegate : FlutterAppDelegate @end ================================================ FILE: example/ios/Runner/AppDelegate.m ================================================ #include "AppDelegate.h" #include "GeneratedPluginRegistrant.h" @implementation AppDelegate - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { [GeneratedPluginRegistrant registerWithRegistry:self]; // Override point for customization after application launch. return [super application:application didFinishLaunchingWithOptions:launchOptions]; } @end ================================================ FILE: example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json ================================================ { "images" : [ { "size" : "20x20", "idiom" : "iphone", "filename" : "Icon-App-20x20@2x.png", "scale" : "2x" }, { "size" : "20x20", "idiom" : "iphone", "filename" : "Icon-App-20x20@3x.png", "scale" : "3x" }, { "size" : "29x29", "idiom" : "iphone", "filename" : "Icon-App-29x29@1x.png", "scale" : "1x" }, { "size" : "29x29", "idiom" : "iphone", "filename" : "Icon-App-29x29@2x.png", "scale" : "2x" }, { "size" : "29x29", "idiom" : "iphone", "filename" : "Icon-App-29x29@3x.png", "scale" : "3x" }, { "size" : "40x40", "idiom" : "iphone", "filename" : "Icon-App-40x40@2x.png", "scale" : "2x" }, { "size" : "40x40", "idiom" : "iphone", "filename" : "Icon-App-40x40@3x.png", "scale" : "3x" }, { "size" : "60x60", "idiom" : "iphone", "filename" : "Icon-App-60x60@2x.png", "scale" : "2x" }, { "size" : "60x60", "idiom" : "iphone", "filename" : "Icon-App-60x60@3x.png", "scale" : "3x" }, { "size" : "20x20", "idiom" : "ipad", "filename" : "Icon-App-20x20@1x.png", "scale" : "1x" }, { "size" : "20x20", "idiom" : "ipad", "filename" : "Icon-App-20x20@2x.png", "scale" : "2x" }, { "size" : "29x29", "idiom" : "ipad", "filename" : "Icon-App-29x29@1x.png", "scale" : "1x" }, { "size" : "29x29", "idiom" : "ipad", "filename" : "Icon-App-29x29@2x.png", "scale" : "2x" }, { "size" : "40x40", "idiom" : "ipad", "filename" : "Icon-App-40x40@1x.png", "scale" : "1x" }, { "size" : "40x40", "idiom" : "ipad", "filename" : "Icon-App-40x40@2x.png", "scale" : "2x" }, { "size" : "76x76", "idiom" : "ipad", "filename" : "Icon-App-76x76@1x.png", "scale" : "1x" }, { "size" : "76x76", "idiom" : "ipad", "filename" : "Icon-App-76x76@2x.png", "scale" : "2x" }, { "size" : "83.5x83.5", "idiom" : "ipad", "filename" : "Icon-App-83.5x83.5@2x.png", "scale" : "2x" }, { "size" : "1024x1024", "idiom" : "ios-marketing", "filename" : "Icon-App-1024x1024@1x.png", "scale" : "1x" } ], "info" : { "version" : 1, "author" : "xcode" } } ================================================ FILE: example/ios/Runner/Assets.xcassets/LaunchImage.imageset/Contents.json ================================================ { "images" : [ { "idiom" : "universal", "filename" : "LaunchImage.png", "scale" : "1x" }, { "idiom" : "universal", "filename" : "LaunchImage@2x.png", "scale" : "2x" }, { "idiom" : "universal", "filename" : "LaunchImage@3x.png", "scale" : "3x" } ], "info" : { "version" : 1, "author" : "xcode" } } ================================================ FILE: example/ios/Runner/Assets.xcassets/LaunchImage.imageset/README.md ================================================ # Launch Screen Assets You can customize the launch screen with your own desired assets by replacing the image files in this directory. You can also do it by opening your Flutter project's Xcode project with `open ios/Runner.xcworkspace`, selecting `Runner/Assets.xcassets` in the Project Navigator and dropping in the desired images. ================================================ FILE: example/ios/Runner/Base.lproj/LaunchScreen.storyboard ================================================ ================================================ FILE: example/ios/Runner/Base.lproj/Main.storyboard ================================================ ================================================ FILE: example/ios/Runner/Info.plist ================================================ CFBundleDevelopmentRegion en CFBundleExecutable $(EXECUTABLE_NAME) CFBundleIdentifier $(PRODUCT_BUNDLE_IDENTIFIER) CFBundleInfoDictionaryVersion 6.0 CFBundleName image_crop_example CFBundlePackageType APPL CFBundleShortVersionString $(FLUTTER_BUILD_NAME) CFBundleSignature ???? CFBundleVersion $(FLUTTER_BUILD_NUMBER) LSRequiresIPhoneOS NSPhotoLibraryUsageDescription $(PRODUCT_NAME) photo use UILaunchStoryboardName LaunchScreen UIMainStoryboardFile Main UIRequiresFullScreen UIStatusBarHidden UISupportedInterfaceOrientations UIInterfaceOrientationPortrait UISupportedInterfaceOrientations~ipad UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UIViewControllerBasedStatusBarAppearance CADisableMinimumFrameDurationOnPhone ================================================ FILE: example/ios/Runner/main.m ================================================ #import #import #import "AppDelegate.h" int main(int argc, char* argv[]) { @autoreleasepool { return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class])); } } ================================================ FILE: example/ios/Runner.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; 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import 'dart:async'; import 'package:flutter/material.dart'; import 'package:flutter/services.dart'; import 'package:image_crop/image_crop.dart'; import 'package:image_picker/image_picker.dart'; void main() { SystemChrome.setSystemUIOverlayStyle(SystemUiOverlayStyle( statusBarColor: Colors.transparent, statusBarBrightness: Brightness.dark, statusBarIconBrightness: Brightness.light, systemNavigationBarIconBrightness: Brightness.light, )); runApp(new MyApp()); } class MyApp extends StatefulWidget { @override _MyAppState createState() => new _MyAppState(); } class _MyAppState extends State { final cropKey = GlobalKey(); File _file; File _sample; File _lastCropped; @override void dispose() { super.dispose(); _file?.delete(); _sample?.delete(); _lastCropped?.delete(); } @override Widget build(BuildContext context) { return MaterialApp( debugShowCheckedModeBanner: false, home: SafeArea( child: Container( color: Colors.black, padding: const EdgeInsets.symmetric(vertical: 40.0, horizontal: 20.0), child: _sample == null ? _buildOpeningImage() : _buildCroppingImage(), ), ), ); } Widget _buildOpeningImage() { return Center(child: _buildOpenImage()); } Widget _buildCroppingImage() { return Column( children: [ Expanded( child: Crop.file(_sample, key: cropKey), ), Container( padding: const EdgeInsets.only(top: 20.0), alignment: AlignmentDirectional.center, child: Row( mainAxisAlignment: MainAxisAlignment.spaceAround, children: [ TextButton( child: Text( 'Crop Image', style: Theme.of(context) .textTheme .button .copyWith(color: Colors.white), ), onPressed: () => _cropImage(), ), _buildOpenImage(), ], ), ) ], ); } Widget _buildOpenImage() { return TextButton( child: Text( 'Open Image', style: Theme.of(context).textTheme.button.copyWith(color: Colors.white), ), onPressed: () => _openImage(), ); } Future _openImage() async { final pickedFile = await ImagePicker().getImage(source: ImageSource.gallery); final file = File(pickedFile.path); final sample = await ImageCrop.sampleImage( file: file, preferredSize: context.size.longestSide.ceil(), ); _sample?.delete(); _file?.delete(); setState(() { _sample = sample; _file = file; }); } Future _cropImage() async { final scale = cropKey.currentState.scale; final area = cropKey.currentState.area; if (area == null) { // cannot crop, widget is not setup return; } // scale up to use maximum possible number of pixels // this will sample image in higher resolution to make cropped image larger final sample = await ImageCrop.sampleImage( file: _file, preferredSize: (2000 / scale).round(), ); final file = await ImageCrop.cropImage( file: sample, area: area, ); sample.delete(); _lastCropped?.delete(); _lastCropped = file; debugPrint('$file'); } } ================================================ FILE: example/pubspec.yaml ================================================ name: image_crop_example description: Demonstrates how to use the image_crop plugin. version: 1.0.0+1 environment: sdk: ">=2.0.0-dev.68.0 <3.0.0" dependencies: flutter: sdk: flutter cupertino_icons: ^0.1.3 image_picker: ^0.7.4 dev_dependencies: flutter_test: sdk: flutter image_crop: path: ../ flutter: uses-material-design: true ================================================ FILE: ios/.gitignore ================================================ .idea/ .vagrant/ .sconsign.dblite .svn/ .DS_Store *.swp profile DerivedData/ build/ GeneratedPluginRegistrant.h GeneratedPluginRegistrant.m .generated/ *.pbxuser *.mode1v3 *.mode2v3 *.perspectivev3 !default.pbxuser !default.mode1v3 !default.mode2v3 !default.perspectivev3 xcuserdata *.moved-aside *.pyc *sync/ Icon? .tags* /Flutter/Generated.xcconfig ================================================ FILE: ios/Assets/.gitkeep ================================================ ================================================ FILE: ios/Classes/ImageCropPlugin.h ================================================ #import @interface ImageCropPlugin : NSObject @end ================================================ FILE: ios/Classes/ImageCropPlugin.m ================================================ #import "ImageCropPlugin.h" #import #import @implementation ImageCropPlugin + (void)registerWithRegistrar:(NSObject*)registrar { FlutterMethodChannel* channel = [FlutterMethodChannel methodChannelWithName:@"plugins.lykhonis.com/image_crop" binaryMessenger:[registrar messenger]]; ImageCropPlugin* instance = [ImageCropPlugin new]; [registrar addMethodCallDelegate:instance channel:channel]; } - (void)handleMethodCall:(FlutterMethodCall*)call result:(FlutterResult)result { if ([@"cropImage" isEqualToString:call.method]) { NSString* path = (NSString*)call.arguments[@"path"]; NSNumber* left = (NSNumber*)call.arguments[@"left"]; NSNumber* top = (NSNumber*)call.arguments[@"top"]; NSNumber* right = (NSNumber*)call.arguments[@"right"]; NSNumber* bottom = (NSNumber*)call.arguments[@"bottom"]; NSNumber* scale = (NSNumber*)call.arguments[@"scale"]; CGRect area = CGRectMake(left.floatValue, top.floatValue, right.floatValue - left.floatValue, bottom.floatValue - top.floatValue); [self cropImage:path area:area scale:scale result:result]; } else if ([@"sampleImage" isEqualToString:call.method]) { NSString* path = (NSString*)call.arguments[@"path"]; NSNumber* maximumWidth = (NSNumber*)call.arguments[@"maximumWidth"]; NSNumber* maximumHeight = (NSNumber*)call.arguments[@"maximumHeight"]; [self sampleImage:path maximumWidth:maximumWidth maximumHeight:maximumHeight result:result]; } else if ([@"getImageOptions" isEqualToString:call.method]) { NSString* path = (NSString*)call.arguments[@"path"]; [self getImageOptions:path result:result]; } else if ([@"requestPermissions" isEqualToString:call.method]){ [self requestPermissionsWithResult:result]; } else { result(FlutterMethodNotImplemented); } } - (void)cropImage:(NSString*)path area:(CGRect)area scale:(NSNumber*)scale result:(FlutterResult)result { [self execute:^{ NSURL* url = [NSURL fileURLWithPath:path]; CGImageSourceRef imageSource = CGImageSourceCreateWithURL((CFURLRef) url, NULL); if (imageSource == NULL) { result([FlutterError errorWithCode:@"INVALID" message:@"Image source cannot be opened" details:nil]); return; } CFDictionaryRef options = (__bridge CFDictionaryRef) @{ (id) kCGImageSourceCreateThumbnailWithTransform: @YES, (id) kCGImageSourceCreateThumbnailFromImageAlways: @YES }; CGImageRef image = CGImageSourceCreateThumbnailAtIndex(imageSource, 0, options); if (image == NULL) { result([FlutterError errorWithCode:@"INVALID" message:@"Image cannot be opened" details:nil]); CFRelease(imageSource); return; } size_t width = CGImageGetWidth(image); size_t height = CGImageGetHeight(image); size_t scaledWidth = (size_t) (width * area.size.width * scale.floatValue); size_t scaledHeight = (size_t) (height * area.size.height * scale.floatValue); size_t bitsPerComponent = CGImageGetBitsPerComponent(image); size_t bytesPerRow = CGImageGetBytesPerRow(image) / width * scaledWidth; CGImageAlphaInfo bitmapInfo = CGImageGetAlphaInfo(image); CGColorSpaceRef colorspace = CGImageGetColorSpace(image); CGImageRef croppedImage = CGImageCreateWithImageInRect(image, CGRectMake(width * area.origin.x, height * area.origin.y, width * area.size.width, height * area.size.height)); CFRelease(image); CFRelease(imageSource); if (scale.floatValue != 1.0) { CGContextRef context = CGBitmapContextCreate(NULL, scaledWidth, scaledHeight, bitsPerComponent, bytesPerRow, colorspace, bitmapInfo); if (context == NULL) { result([FlutterError errorWithCode:@"INVALID" message:@"Image cannot be scaled" details:nil]); CFRelease(croppedImage); return; } CGRect rect = CGContextGetClipBoundingBox(context); CGContextDrawImage(context, rect, croppedImage); CGImageRef scaledImage = CGBitmapContextCreateImage(context); CGContextRelease(context); CFRelease(croppedImage); croppedImage = scaledImage; } NSURL* croppedUrl = [self createTemporaryImageUrl]; bool saved = [self saveImage:croppedImage url:croppedUrl]; CFRelease(croppedImage); if (saved) { result(croppedUrl.path); } else { result([FlutterError errorWithCode:@"INVALID" message:@"Cropped image cannot be saved" details:nil]); } }]; } - (void)sampleImage:(NSString*)path maximumWidth:(NSNumber*)maximumWidth maximumHeight:(NSNumber*)maximumHeight result:(FlutterResult)result { [self execute:^{ NSURL* url = [NSURL fileURLWithPath:path]; CGImageSourceRef image = CGImageSourceCreateWithURL((CFURLRef) url, NULL); if (image == NULL) { result([FlutterError errorWithCode:@"INVALID" message:@"Image source cannot be opened" details:nil]); return; } CFDictionaryRef properties = CGImageSourceCopyPropertiesAtIndex(image, 0, nil); if (properties == NULL) { CFRelease(image); result([FlutterError errorWithCode:@"INVALID" message:@"Image source properties cannot be copied" details:nil]); return; } NSNumber* width = (NSNumber*) CFDictionaryGetValue(properties, kCGImagePropertyPixelWidth); NSNumber* height = (NSNumber*) CFDictionaryGetValue(properties, kCGImagePropertyPixelHeight); CFRelease(properties); double widthRatio = MIN(1.0, maximumWidth.doubleValue / width.doubleValue); double heightRatio = MIN(1.0, maximumHeight.doubleValue / height.doubleValue); double ratio = MAX(widthRatio, heightRatio); NSNumber* maximumSize = @(MAX(width.doubleValue * ratio, height.doubleValue * ratio)); CFDictionaryRef options = (__bridge CFDictionaryRef) @{ (id) kCGImageSourceCreateThumbnailWithTransform: @YES, (id) kCGImageSourceCreateThumbnailFromImageAlways : @YES, (id) kCGImageSourceThumbnailMaxPixelSize : maximumSize }; CGImageRef sampleImage = CGImageSourceCreateThumbnailAtIndex(image, 0, options); CFRelease(image); if (sampleImage == NULL) { result([FlutterError errorWithCode:@"INVALID" message:@"Image sample cannot be created" details:nil]); return; } NSURL* sampleUrl = [self createTemporaryImageUrl]; bool saved = [self saveImage:sampleImage url:sampleUrl]; CFRelease(sampleImage); if (saved) { result(sampleUrl.path); } else { result([FlutterError errorWithCode:@"INVALID" message:@"Image sample cannot be saved" details:nil]); } }]; } - (void)getImageOptions:(NSString*)path result:(FlutterResult)result { [self execute:^{ NSURL* url = [NSURL fileURLWithPath:path]; CGImageSourceRef image = CGImageSourceCreateWithURL((CFURLRef) url, NULL); if (image == NULL) { result([FlutterError errorWithCode:@"INVALID" message:@"Image source cannot be opened" details:nil]); return; } CFDictionaryRef properties = CGImageSourceCopyPropertiesAtIndex(image, 0, nil); CFRelease(image); if (properties == NULL) { result([FlutterError errorWithCode:@"INVALID" message:@"Image source properties cannot be copied" details:nil]); return; } NSNumber* width = (NSNumber*) CFDictionaryGetValue(properties, kCGImagePropertyPixelWidth); NSNumber* height = (NSNumber*) CFDictionaryGetValue(properties, kCGImagePropertyPixelHeight); CFRelease(properties); result(@{ @"width": width, @"height": height }); }]; } - (void)requestPermissionsWithResult:(FlutterResult)result { [PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) { if (status == PHAuthorizationStatusAuthorized) { result(@YES); } else { result(@NO); } }]; } - (bool)saveImage:(CGImageRef)image url:(NSURL*)url { CGImageDestinationRef destination = CGImageDestinationCreateWithURL((CFURLRef) url, kUTTypeJPEG, 1, NULL); CGImageDestinationAddImage(destination, image, NULL); bool finilized = CGImageDestinationFinalize(destination); CFRelease(destination); return finilized; } - (NSURL*)createTemporaryImageUrl { NSString* temproraryDirectory = NSTemporaryDirectory(); NSString* guid = [[NSProcessInfo processInfo] globallyUniqueString]; NSString* sampleName = [[@"image_crop_" stringByAppendingString:guid] stringByAppendingString:@".jpg"]; NSString* samplePath = [temproraryDirectory stringByAppendingPathComponent:sampleName]; return [NSURL fileURLWithPath:samplePath]; } - (void)execute:(void (^)(void))block { dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), block); } @end ================================================ FILE: ios/image_crop.podspec ================================================ # # To learn more about a Podspec see http://guides.cocoapods.org/syntax/podspec.html # Pod::Spec.new do |s| s.name = 'image_crop' s.version = '0.0.1' s.summary = 'A flutter plugin to crop image on iOS and Android.' s.description = <<-DESC A flutter plugin to crop image on iOS and Android. DESC s.homepage = 'http://example.com' s.license = { :file => '../LICENSE' } s.author = { 'Your Company' => 'email@example.com' } s.source = { :path => '.' } s.source_files = 'Classes/**/*' s.public_header_files = 'Classes/**/*.h' s.dependency 'Flutter' s.ios.deployment_target = '8.0' end ================================================ FILE: lib/image_crop.dart ================================================ library image_crop; import 'dart:async'; import 'dart:io'; import 'dart:math'; import 'dart:ui' as ui; import 'package:flutter/gestures.dart'; import 'package:flutter/widgets.dart'; import 'package:flutter/services.dart'; part 'src/image_crop.dart'; part 'src/crop.dart'; ================================================ FILE: lib/src/crop.dart ================================================ part of image_crop; const _kCropGridColumnCount = 3; const _kCropGridRowCount = 3; const _kCropGridColor = Color.fromRGBO(0xd0, 0xd0, 0xd0, 0.9); const _kCropOverlayActiveOpacity = 0.3; const _kCropOverlayInactiveOpacity = 0.7; const _kCropHandleColor = Color.fromRGBO(0xd0, 0xd0, 0xd0, 1.0); const _kCropHandleSize = 10.0; const _kCropHandleHitSize = 48.0; const _kCropMinFraction = 0.1; enum _CropAction { none, moving, cropping, scaling } enum _CropHandleSide { none, topLeft, topRight, bottomLeft, bottomRight } class Crop extends StatefulWidget { final ImageProvider image; final double? aspectRatio; final double maximumScale; final bool alwaysShowGrid; final ImageErrorListener? onImageError; const Crop({ Key? key, required this.image, this.aspectRatio, this.maximumScale = 2.0, this.alwaysShowGrid = false, this.onImageError, }) : super(key: key); Crop.file( File file, { Key? key, double scale = 1.0, this.aspectRatio, this.maximumScale = 2.0, this.alwaysShowGrid = false, this.onImageError, }) : image = FileImage(file, scale: scale), super(key: key); Crop.asset( String assetName, { Key? key, AssetBundle? bundle, String? package, this.aspectRatio, this.maximumScale = 2.0, this.alwaysShowGrid = false, this.onImageError, }) : image = AssetImage(assetName, bundle: bundle, package: package), super(key: key); @override State createState() => CropState(); static CropState? of(BuildContext context) => context.findAncestorStateOfType(); } class CropState extends State with TickerProviderStateMixin, Drag { final _surfaceKey = GlobalKey(); late final AnimationController _activeController; late final AnimationController _settleController; double _scale = 1.0; double _ratio = 1.0; Rect _view = Rect.zero; Rect _area = Rect.zero; Offset _lastFocalPoint = Offset.zero; _CropAction _action = _CropAction.none; _CropHandleSide _handle = _CropHandleSide.none; late double _startScale; late Rect _startView; late Tween _viewTween; late Tween _scaleTween; ImageStream? _imageStream; ui.Image? _image; ImageStreamListener? _imageListener; double get scale => _area.shortestSide / _scale; Rect? get area => _view.isEmpty ? null : Rect.fromLTWH( max(_area.left * _view.width / _scale - _view.left, 0), max(_area.top * _view.height / _scale - _view.top, 0), _area.width * _view.width / _scale, _area.height * _view.height / _scale, ); bool get _isEnabled => _view.isEmpty == false && _image != null; // Saving the length for the widest area for different aspectRatio's final Map _maxAreaWidthMap = {}; // Counting pointers(number of user fingers on screen) int pointers = 0; @override void initState() { super.initState(); _activeController = AnimationController( vsync: this, value: widget.alwaysShowGrid ? 1.0 : 0.0, )..addListener(() => setState(() {})); _settleController = AnimationController(vsync: this) ..addListener(_settleAnimationChanged); } @override void dispose() { final listener = _imageListener; if (listener != null) { _imageStream?.removeListener(listener); } _activeController.dispose(); _settleController.dispose(); super.dispose(); } @override void didChangeDependencies() { super.didChangeDependencies(); _getImage(); } @override void didUpdateWidget(Crop oldWidget) { super.didUpdateWidget(oldWidget); if (widget.image != oldWidget.image) { _getImage(); } else if (widget.aspectRatio != oldWidget.aspectRatio) { _area = _calculateDefaultArea( viewWidth: _view.width, viewHeight: _view.height, imageWidth: _image?.width, imageHeight: _image?.height, ); } if (widget.alwaysShowGrid != oldWidget.alwaysShowGrid) { if (widget.alwaysShowGrid) { _activate(); } else { _deactivate(); } } } void _getImage({bool force = false}) { final oldImageStream = _imageStream; final newImageStream = widget.image.resolve(createLocalImageConfiguration(context)); _imageStream = newImageStream; if (newImageStream.key != oldImageStream?.key || force) { final oldImageListener = _imageListener; if (oldImageListener != null) { oldImageStream?.removeListener(oldImageListener); } final newImageListener = ImageStreamListener(_updateImage, onError: widget.onImageError); _imageListener = newImageListener; newImageStream.addListener(newImageListener); } } @override Widget build(BuildContext context) => ConstrainedBox( constraints: const BoxConstraints.expand(), child: Listener( onPointerDown: (event) => pointers++, onPointerUp: (event) => pointers = 0, child: GestureDetector( key: _surfaceKey, behavior: HitTestBehavior.opaque, onScaleStart: _isEnabled ? _handleScaleStart : null, onScaleUpdate: _isEnabled ? _handleScaleUpdate : null, onScaleEnd: _isEnabled ? _handleScaleEnd : null, child: CustomPaint( painter: _CropPainter( image: _image, ratio: _ratio, view: _view, area: _area, scale: _scale, active: _activeController.value, ), ), ), ), ); void _activate() { _activeController.animateTo( 1.0, curve: Curves.fastOutSlowIn, duration: const Duration(milliseconds: 250), ); } void _deactivate() { if (widget.alwaysShowGrid == false) { _activeController.animateTo( 0.0, curve: Curves.fastOutSlowIn, duration: const Duration(milliseconds: 250), ); } } Size? get _boundaries { final context = _surfaceKey.currentContext; if (context == null) { return null; } final size = context.size; if (size == null) { return null; } return size - const Offset(_kCropHandleSize, _kCropHandleSize) as Size; } Offset? _getLocalPoint(Offset point) { final context = _surfaceKey.currentContext; if (context == null) { return null; } final box = context.findRenderObject() as RenderBox; return box.globalToLocal(point); } void _settleAnimationChanged() { setState(() { _scale = _scaleTween.transform(_settleController.value); final nextView = _viewTween.transform(_settleController.value); if (nextView != null) { _view = nextView; } }); } Rect _calculateDefaultArea({ required int? imageWidth, required int? imageHeight, required double viewWidth, required double viewHeight, }) { if (imageWidth == null || imageHeight == null) { return Rect.zero; } double height; double width; if ((widget.aspectRatio ?? 1.0) < 1) { height = 1.0; width = ((widget.aspectRatio ?? 1.0) * imageHeight * viewHeight * height) / imageWidth / viewWidth; if (width > 1.0) { width = 1.0; height = (imageWidth * viewWidth * width) / (imageHeight * viewHeight * (widget.aspectRatio ?? 1.0)); } } else { width = 1.0; height = (imageWidth * viewWidth * width) / (imageHeight * viewHeight * (widget.aspectRatio ?? 1.0)); if (height > 1.0) { height = 1.0; width = ((widget.aspectRatio ?? 1.0) * imageHeight * viewHeight * height) / imageWidth / viewWidth; } } final aspectRatio = _maxAreaWidthMap[widget.aspectRatio]; if (aspectRatio != null) { _maxAreaWidthMap[aspectRatio] = width; } return Rect.fromLTWH((1.0 - width) / 2, (1.0 - height) / 2, width, height); } void _updateImage(ImageInfo imageInfo, bool synchronousCall) { final boundaries = _boundaries; if (boundaries == null) { return; } WidgetsBinding.instance.addPostFrameCallback((timeStamp) { final image = imageInfo.image; setState(() { _image = image; _scale = imageInfo.scale; _ratio = max( boundaries.width / image.width, boundaries.height / image.height, ); final viewWidth = boundaries.width / (image.width * _scale * _ratio); final viewHeight = boundaries.height / (image.height * _scale * _ratio); _area = _calculateDefaultArea( viewWidth: viewWidth, viewHeight: viewHeight, imageWidth: image.width, imageHeight: image.height, ); _view = Rect.fromLTWH( (viewWidth - 1.0) / 2, (viewHeight - 1.0) / 2, viewWidth, viewHeight, ); }); }); WidgetsBinding.instance.ensureVisualUpdate(); } _CropHandleSide _hitCropHandle(Offset? localPoint) { final boundaries = _boundaries; if (localPoint == null || boundaries == null) { return _CropHandleSide.none; } final viewRect = Rect.fromLTWH( boundaries.width * _area.left, boundaries.height * _area.top, boundaries.width * _area.width, boundaries.height * _area.height, ).deflate(_kCropHandleSize / 2); if (Rect.fromLTWH( viewRect.left - _kCropHandleHitSize / 2, viewRect.top - _kCropHandleHitSize / 2, _kCropHandleHitSize, _kCropHandleHitSize, ).contains(localPoint)) { return _CropHandleSide.topLeft; } if (Rect.fromLTWH( viewRect.right - _kCropHandleHitSize / 2, viewRect.top - _kCropHandleHitSize / 2, _kCropHandleHitSize, _kCropHandleHitSize, ).contains(localPoint)) { return _CropHandleSide.topRight; } if (Rect.fromLTWH( viewRect.left - _kCropHandleHitSize / 2, viewRect.bottom - _kCropHandleHitSize / 2, _kCropHandleHitSize, _kCropHandleHitSize, ).contains(localPoint)) { return _CropHandleSide.bottomLeft; } if (Rect.fromLTWH( viewRect.right - _kCropHandleHitSize / 2, viewRect.bottom - _kCropHandleHitSize / 2, _kCropHandleHitSize, _kCropHandleHitSize, ).contains(localPoint)) { return _CropHandleSide.bottomRight; } return _CropHandleSide.none; } void _handleScaleStart(ScaleStartDetails details) { _activate(); _settleController.stop(canceled: false); _lastFocalPoint = details.focalPoint; _action = _CropAction.none; _handle = _hitCropHandle(_getLocalPoint(details.focalPoint)); _startScale = _scale; _startView = _view; } Rect _getViewInBoundaries(double scale) => Offset( max( min( _view.left, _area.left * _view.width / scale, ), _area.right * _view.width / scale - 1.0, ), max( min( _view.top, _area.top * _view.height / scale, ), _area.bottom * _view.height / scale - 1.0, ), ) & _view.size; double get _maximumScale => widget.maximumScale; double? get _minimumScale { final boundaries = _boundaries; final image = _image; if (boundaries == null || image == null) { return null; } final scaleX = boundaries.width * _area.width / (image.width * _ratio); final scaleY = boundaries.height * _area.height / (image.height * _ratio); return min(_maximumScale, max(scaleX, scaleY)); } void _handleScaleEnd(ScaleEndDetails details) { _deactivate(); final minimumScale = _minimumScale; if (minimumScale == null) { return; } final targetScale = _scale.clamp(minimumScale, _maximumScale); _scaleTween = Tween( begin: _scale, end: targetScale, ); _startView = _view; _viewTween = RectTween( begin: _view, end: _getViewInBoundaries(targetScale), ); _settleController.value = 0.0; _settleController.animateTo( 1.0, curve: Curves.fastOutSlowIn, duration: const Duration(milliseconds: 350), ); } void _updateArea({ required _CropHandleSide cropHandleSide, double? left, double? top, double? right, double? bottom, }) { final image = _image; if (image == null) { return; } var areaLeft = _area.left + (left ?? 0.0); var areaBottom = _area.bottom + (bottom ?? 0.0); var areaTop = _area.top + (top ?? 0.0); var areaRight = _area.right + (right ?? 0.0); double width = areaRight - areaLeft; double height = (image.width * _view.width * width) / (image.height * _view.height * (widget.aspectRatio ?? 1.0)); final maxAreaWidth = _maxAreaWidthMap[widget.aspectRatio]; if ((height >= 1.0 || width >= 1.0) && maxAreaWidth != null) { height = 1.0; if (cropHandleSide == _CropHandleSide.bottomLeft || cropHandleSide == _CropHandleSide.topLeft) { areaLeft = areaRight - maxAreaWidth; } else { areaRight = areaLeft + maxAreaWidth; } } // ensure minimum rectangle if (areaRight - areaLeft < _kCropMinFraction) { if (left != null) { areaLeft = areaRight - _kCropMinFraction; } else { areaRight = areaLeft + _kCropMinFraction; } } if (areaBottom - areaTop < _kCropMinFraction) { if (top != null) { areaTop = areaBottom - _kCropMinFraction; } else { areaBottom = areaTop + _kCropMinFraction; } } // adjust to aspect ratio if needed final aspectRatio = widget.aspectRatio; if (aspectRatio != null && aspectRatio > 0.0) { if (top != null) { areaTop = areaBottom - height; if (areaTop < 0.0) { areaTop = 0.0; areaBottom = height; } } else { areaBottom = areaTop + height; if (areaBottom > 1.0) { areaTop = 1.0 - height; areaBottom = 1.0; } } } // ensure to remain within bounds of the view if (areaLeft < 0.0) { areaLeft = 0.0; areaRight = _area.width; } else if (areaRight > 1.0) { areaLeft = 1.0 - _area.width; areaRight = 1.0; } if (areaTop < 0.0) { areaTop = 0.0; areaBottom = _area.height; } else if (areaBottom > 1.0) { areaTop = 1.0 - _area.height; areaBottom = 1.0; } setState(() { _area = Rect.fromLTRB(areaLeft, areaTop, areaRight, areaBottom); }); } void _handleScaleUpdate(ScaleUpdateDetails details) { if (_action == _CropAction.none) { if (_handle == _CropHandleSide.none) { _action = pointers == 2 ? _CropAction.scaling : _CropAction.moving; } else { _action = _CropAction.cropping; } } if (_action == _CropAction.cropping) { final boundaries = _boundaries; if (boundaries == null) { return; } final delta = details.focalPoint - _lastFocalPoint; _lastFocalPoint = details.focalPoint; final dx = delta.dx / boundaries.width; final dy = delta.dy / boundaries.height; if (_handle == _CropHandleSide.topLeft) { _updateArea(left: dx, top: dy, cropHandleSide: _CropHandleSide.topLeft); } else if (_handle == _CropHandleSide.topRight) { _updateArea( top: dy, right: dx, cropHandleSide: _CropHandleSide.topRight); } else if (_handle == _CropHandleSide.bottomLeft) { _updateArea( left: dx, bottom: dy, cropHandleSide: _CropHandleSide.bottomLeft); } else if (_handle == _CropHandleSide.bottomRight) { _updateArea( right: dx, bottom: dy, cropHandleSide: _CropHandleSide.bottomRight); } } else if (_action == _CropAction.moving) { final image = _image; if (image == null) { return; } final delta = details.focalPoint - _lastFocalPoint; _lastFocalPoint = details.focalPoint; setState(() { _view = _view.translate( delta.dx / (image.width * _scale * _ratio), delta.dy / (image.height * _scale * _ratio), ); }); } else if (_action == _CropAction.scaling) { final image = _image; final boundaries = _boundaries; if (image == null || boundaries == null) { return; } setState(() { _scale = _startScale * details.scale; final dx = boundaries.width * (1.0 - details.scale) / (image.width * _scale * _ratio); final dy = boundaries.height * (1.0 - details.scale) / (image.height * _scale * _ratio); _view = Rect.fromLTWH( _startView.left + dx / 2, _startView.top + dy / 2, _startView.width, _startView.height, ); }); } } } class _CropPainter extends CustomPainter { final ui.Image? image; final Rect view; final double ratio; final Rect area; final double scale; final double active; _CropPainter({ required this.image, required this.view, required this.ratio, required this.area, required this.scale, required this.active, }); @override bool shouldRepaint(_CropPainter oldDelegate) { return oldDelegate.image != image || oldDelegate.view != view || oldDelegate.ratio != ratio || oldDelegate.area != area || oldDelegate.active != active || oldDelegate.scale != scale; } @override void paint(Canvas canvas, Size size) { final rect = Rect.fromLTWH( _kCropHandleSize / 2, _kCropHandleSize / 2, size.width - _kCropHandleSize, size.height - _kCropHandleSize, ); canvas.save(); canvas.translate(rect.left, rect.top); final paint = Paint()..isAntiAlias = false; final image = this.image; if (image != null) { final src = Rect.fromLTWH( 0.0, 0.0, image.width.toDouble(), image.height.toDouble(), ); final dst = Rect.fromLTWH( view.left * image.width * scale * ratio, view.top * image.height * scale * ratio, image.width * scale * ratio, image.height * scale * ratio, ); canvas.save(); canvas.clipRect(Rect.fromLTWH(0.0, 0.0, rect.width, rect.height)); canvas.drawImageRect(image, src, dst, paint); canvas.restore(); } paint.color = Color.fromRGBO( 0x0, 0x0, 0x0, _kCropOverlayActiveOpacity * active + _kCropOverlayInactiveOpacity * (1.0 - active)); final boundaries = Rect.fromLTWH( rect.width * area.left, rect.height * area.top, rect.width * area.width, rect.height * area.height, ); canvas.drawRect(Rect.fromLTRB(0.0, 0.0, rect.width, boundaries.top), paint); canvas.drawRect( Rect.fromLTRB(0.0, boundaries.bottom, rect.width, rect.height), paint); canvas.drawRect( Rect.fromLTRB(0.0, boundaries.top, boundaries.left, boundaries.bottom), paint); canvas.drawRect( Rect.fromLTRB( boundaries.right, boundaries.top, rect.width, boundaries.bottom), paint); if (boundaries.isEmpty == false) { _drawGrid(canvas, boundaries); _drawHandles(canvas, boundaries); } canvas.restore(); } void _drawHandles(Canvas canvas, Rect boundaries) { final paint = Paint() ..isAntiAlias = true ..color = _kCropHandleColor; canvas.drawOval( Rect.fromLTWH( boundaries.left - _kCropHandleSize / 2, boundaries.top - _kCropHandleSize / 2, _kCropHandleSize, _kCropHandleSize, ), paint, ); canvas.drawOval( Rect.fromLTWH( boundaries.right - _kCropHandleSize / 2, boundaries.top - _kCropHandleSize / 2, _kCropHandleSize, _kCropHandleSize, ), paint, ); canvas.drawOval( Rect.fromLTWH( boundaries.right - _kCropHandleSize / 2, boundaries.bottom - _kCropHandleSize / 2, _kCropHandleSize, _kCropHandleSize, ), paint, ); canvas.drawOval( Rect.fromLTWH( boundaries.left - _kCropHandleSize / 2, boundaries.bottom - _kCropHandleSize / 2, _kCropHandleSize, _kCropHandleSize, ), paint, ); } void _drawGrid(Canvas canvas, Rect boundaries) { if (active == 0.0) return; final paint = Paint() ..isAntiAlias = false ..color = _kCropGridColor.withOpacity(_kCropGridColor.opacity * active) ..style = PaintingStyle.stroke ..strokeWidth = 1.0; final path = Path() ..moveTo(boundaries.left, boundaries.top) ..lineTo(boundaries.right, boundaries.top) ..lineTo(boundaries.right, boundaries.bottom) ..lineTo(boundaries.left, boundaries.bottom) ..lineTo(boundaries.left, boundaries.top); for (var column = 1; column < _kCropGridColumnCount; column++) { path ..moveTo( boundaries.left + column * boundaries.width / _kCropGridColumnCount, boundaries.top) ..lineTo( boundaries.left + column * boundaries.width / _kCropGridColumnCount, boundaries.bottom); } for (var row = 1; row < _kCropGridRowCount; row++) { path ..moveTo(boundaries.left, boundaries.top + row * boundaries.height / _kCropGridRowCount) ..lineTo(boundaries.right, boundaries.top + row * boundaries.height / _kCropGridRowCount); } canvas.drawPath(path, paint); } } ================================================ FILE: lib/src/image_crop.dart ================================================ part of image_crop; class ImageOptions { final int width; final int height; ImageOptions({ required this.width, required this.height, }); @override int get hashCode => hashValues(width, height); @override bool operator ==(other) => other is ImageOptions && other.width == width && other.height == height; @override String toString() => '$runtimeType(width: $width, height: $height)'; } class ImageCrop { static const _channel = const MethodChannel('plugins.lykhonis.com/image_crop'); static Future requestPermissions() => _channel .invokeMethod('requestPermissions') .then((result) => result); static Future getImageOptions({ required File file, }) async { final result = await _channel.invokeMethod('getImageOptions', {'path': file.path}); return ImageOptions( width: result['width'], height: result['height'], ); } static Future cropImage({ required File file, required Rect area, double? scale, }) => _channel.invokeMethod('cropImage', { 'path': file.path, 'left': area.left, 'top': area.top, 'right': area.right, 'bottom': area.bottom, 'scale': scale ?? 1.0, }).then((result) => File(result)); static Future sampleImage({ required File file, int? preferredSize, int? preferredWidth, int? preferredHeight, }) async { assert(() { if (preferredSize == null && (preferredWidth == null || preferredHeight == null)) { throw ArgumentError( 'Preferred size or both width and height of a resampled image must be specified.'); } return true; }()); final String path = await _channel.invokeMethod('sampleImage', { 'path': file.path, 'maximumWidth': preferredSize ?? preferredWidth, 'maximumHeight': preferredSize ?? preferredHeight, }); return File(path); } } ================================================ FILE: pubspec.yaml ================================================ name: image_crop description: A flutter plugin to crop image on iOS and Android. It processes image files off main thread natively. The plugin provides a Crop widget to display image cropping to a user. version: 0.4.1 homepage: https://github.com/VolodymyrLykhonis/image_crop environment: sdk: ">=2.17.0 <3.0.0" flutter: ">=2.5.0" dependencies: flutter: sdk: flutter dev_dependencies: flutter_test: sdk: flutter flutter: plugin: platforms: android: package: com.lykhonis.imagecrop pluginClass: ImageCropPlugin ios: pluginClass: ImageCropPlugin