feat: Add document scanner package

2025-12-09 04:07:57 -06:00 · 2023-02-22 18:17:50 +01:00
parent a8a41b38a8
commit 9c5a45f329
105 changed files with 3998 additions and 0 deletions
--- a/packages/paperless_document_scanner/.gitignore
+++ b/packages/paperless_document_scanner/.gitignore
@@ -0,0 +1,40 @@
+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.buildlog/
+.history
+.svn/
+migrate_working_dir/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+# Libraries should not include pubspec.lock, per https://dart.dev/guides/libraries/private-files#pubspeclock.
+/pubspec.lock
+**/doc/api/
+.dart_tool/
+.packages
+build/
+
+android/src/main/jniLibs
+android/CMakeFiles
+android/Makefile
+android/.cxx
+CMakeCache.txt
+cmake_install.cmake
+
+ios/opencv2.framework
+include
--- a/packages/paperless_document_scanner/.metadata
+++ b/packages/paperless_document_scanner/.metadata
@@ -0,0 +1,33 @@
+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled.
+
+version:
+  revision: 9944297138845a94256f1cf37beb88ff9a8e811a
+  channel: stable
+
+project_type: plugin
+
+# Tracks metadata for the flutter migrate command
+migration:
+  platforms:
+    - platform: root
+      create_revision: 9944297138845a94256f1cf37beb88ff9a8e811a
+      base_revision: 9944297138845a94256f1cf37beb88ff9a8e811a
+    - platform: android
+      create_revision: 9944297138845a94256f1cf37beb88ff9a8e811a
+      base_revision: 9944297138845a94256f1cf37beb88ff9a8e811a
+    - platform: ios
+      create_revision: 9944297138845a94256f1cf37beb88ff9a8e811a
+      base_revision: 9944297138845a94256f1cf37beb88ff9a8e811a
+
+  # User provided section
+
+  # List of Local paths (relative to this file) that should be
+  # ignored by the migrate tool.
+  #
+  # Files that are not part of the templates will be ignored by default.
+  unmanaged_files:
+    - 'lib/main.dart'
+    - 'ios/Runner.xcodeproj/project.pbxproj'
--- a/packages/paperless_document_scanner/CHANGELOG.md
+++ b/packages/paperless_document_scanner/CHANGELOG.md
@@ -0,0 +1,3 @@
+## 0.0.1
+
+* TODO: Describe initial release.
--- a/packages/paperless_document_scanner/LICENSE
+++ b/packages/paperless_document_scanner/LICENSE
@@ -0,0 +1 @@
+TODO: Add your license here.
--- a/packages/paperless_document_scanner/README.md
+++ b/packages/paperless_document_scanner/README.md
@@ -0,0 +1,15 @@
+# paperless_document_scanner
+
+A new Flutter plugin project.
+
+## Getting Started
+
+This project is a starting point for a Flutter
+[plug-in package](https://flutter.dev/developing-packages/),
+a specialized package that includes platform-specific implementation code for
+Android and/or iOS.
+
+For help getting started with Flutter development, view the
+[online documentation](https://flutter.dev/docs), which offers tutorials,
+samples, guidance on mobile development, and a full API reference.
+
--- a/packages/paperless_document_scanner/analysis_options.yaml
+++ b/packages/paperless_document_scanner/analysis_options.yaml
@@ -0,0 +1,4 @@
+include: package:flutter_lints/flutter.yaml
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options
--- a/packages/paperless_document_scanner/android/.gitignore
+++ b/packages/paperless_document_scanner/android/.gitignore
@@ -0,0 +1,9 @@
+*.iml
+.gradle
+/local.properties
+/.idea/workspace.xml
+/.idea/libraries
+.DS_Store
+/build
+/captures
+.cxx
--- a/packages/paperless_document_scanner/android/CMakeLists.txt
+++ b/packages/paperless_document_scanner/android/CMakeLists.txt
@@ -0,0 +1,13 @@
+cmake_minimum_required(VERSION 3.6.0)
+include_directories(../include)
+add_library(lib_opencv SHARED IMPORTED)
+set_target_properties(lib_opencv PROPERTIES IMPORTED_LOCATION ${CMAKE_CURRENT_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/libopencv_java4.so)
+set(EDGE_DETECTION_DIR "../ios/Classes")
+set(SOURCES
+    ${EDGE_DETECTION_DIR}/native_edge_detection.cpp
+    ${EDGE_DETECTION_DIR}/edge_detector.cpp
+    ${EDGE_DETECTION_DIR}/image_processor.cpp
+    ${EDGE_DETECTION_DIR}/conversion_utils.cpp
+)
+add_library(native_edge_detection SHARED ${SOURCES})
+target_link_libraries(native_edge_detection lib_opencv)
--- a/packages/paperless_document_scanner/android/build.gradle
+++ b/packages/paperless_document_scanner/android/build.gradle
@@ -0,0 +1,68 @@
+group 'de.astubenbord.paperless_document_scanner'
+version '1.0-SNAPSHOT'
+
+buildscript {
+    ext.kotlin_version = '1.7.10'
+    repositories {
+        google()
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:7.2.0'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android'
+
+android {
+    compileSdkVersion 31
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+
+    sourceSets {
+        main.java.srcDirs += 'src/main/kotlin'
+        main {
+            jniLibs.srcDirs = ['jniLibs']
+        }
+    }
+
+    defaultConfig {
+        minSdkVersion 21
+    }
+
+    lintOptions {
+        disable 'InvalidPackage'
+    }
+
+    externalNativeBuild {
+        cmake {
+            path "CMakeLists.txt"
+        }
+    }
+
+    defaultConfig {
+        externalNativeBuild {
+            cmake {
+                cppFlags '-frtti -fexceptions -std=c++11'
+                arguments "-DANDROID_STL=c++_shared"
+            }
+        }
+    }
+}
--- a/packages/paperless_document_scanner/android/settings.gradle
+++ b/packages/paperless_document_scanner/android/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = 'paperless_document_scanner'
--- a/packages/paperless_document_scanner/android/src/main/AndroidManifest.xml
+++ b/packages/paperless_document_scanner/android/src/main/AndroidManifest.xml
@@ -0,0 +1,3 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+  package="de.astubenbord.paperless_document_scanner">
+</manifest>
--- a/packages/paperless_document_scanner/android/src/main/kotlin/de/astubenbord/paperless_document_scanner/PaperlessDocumentScannerPlugin.kt
+++ b/packages/paperless_document_scanner/android/src/main/kotlin/de/astubenbord/paperless_document_scanner/PaperlessDocumentScannerPlugin.kt
@@ -0,0 +1,35 @@
+package de.astubenbord.paperless_document_scanner
+
+import androidx.annotation.NonNull
+
+import io.flutter.embedding.engine.plugins.FlutterPlugin
+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
+
+/** PaperlessDocumentScannerPlugin */
+class PaperlessDocumentScannerPlugin: FlutterPlugin, MethodCallHandler {
+  /// The MethodChannel that will the communication between Flutter and native Android
+  ///
+  /// This local reference serves to register the plugin with the Flutter Engine and unregister it
+  /// when the Flutter Engine is detached from the Activity
+  private lateinit var channel : MethodChannel
+
+  override fun onAttachedToEngine(@NonNull flutterPluginBinding: FlutterPlugin.FlutterPluginBinding) {
+    channel = MethodChannel(flutterPluginBinding.binaryMessenger, "paperless_document_scanner")
+    channel.setMethodCallHandler(this)
+  }
+
+  override fun onMethodCall(@NonNull call: MethodCall, @NonNull result: Result) {
+    if (call.method == "getPlatformVersion") {
+      result.success("Android ${android.os.Build.VERSION.RELEASE}")
+    } else {
+      result.notImplemented()
+    }
+  }
+
+  override fun onDetachedFromEngine(@NonNull binding: FlutterPlugin.FlutterPluginBinding) {
+    channel.setMethodCallHandler(null)
+  }
+}
--- a/packages/paperless_document_scanner/example/.gitignore
+++ b/packages/paperless_document_scanner/example/.gitignore
@@ -0,0 +1,44 @@
+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.buildlog/
+.history
+.svn/
+migrate_working_dir/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+**/doc/api/
+**/ios/Flutter/.last_build_id
+.dart_tool/
+.flutter-plugins
+.flutter-plugins-dependencies
+.packages
+.pub-cache/
+.pub/
+/build/
+
+# Symbolication related
+app.*.symbols
+
+# Obfuscation related
+app.*.map.json
+
+# Android Studio will place build artifacts here
+/android/app/debug
+/android/app/profile
+/android/app/release
--- a/packages/paperless_document_scanner/example/README.md
+++ b/packages/paperless_document_scanner/example/README.md
@@ -0,0 +1,16 @@
+# paperless_document_scanner_example
+
+Demonstrates how to use the paperless_document_scanner plugin.
+
+## Getting Started
+
+This project is a starting point for a Flutter application.
+
+A few resources to get you started if this is your first Flutter project:
+
+- [Lab: Write your first Flutter app](https://docs.flutter.dev/get-started/codelab)
+- [Cookbook: Useful Flutter samples](https://docs.flutter.dev/cookbook)
+
+For help getting started with Flutter development, view the
+[online documentation](https://docs.flutter.dev/), which offers tutorials,
+samples, guidance on mobile development, and a full API reference.
--- a/packages/paperless_document_scanner/example/analysis_options.yaml
+++ b/packages/paperless_document_scanner/example/analysis_options.yaml
@@ -0,0 +1,29 @@
+# This file configures the analyzer, which statically analyzes Dart code to
+# check for errors, warnings, and lints.
+#
+# The issues identified by the analyzer are surfaced in the UI of Dart-enabled
+# IDEs (https://dart.dev/tools#ides-and-editors). The analyzer can also be
+# invoked from the command line by running `flutter analyze`.
+
+# The following line activates a set of recommended lints for Flutter apps,
+# packages, and plugins designed to encourage good coding practices.
+include: package:flutter_lints/flutter.yaml
+
+linter:
+  # The lint rules applied to this project can be customized in the
+  # section below to disable rules from the `package:flutter_lints/flutter.yaml`
+  # included above or to enable additional rules. A list of all available lints
+  # and their documentation is published at
+  # https://dart-lang.github.io/linter/lints/index.html.
+  #
+  # Instead of disabling a lint rule for the entire project in the
+  # section below, it can also be suppressed for a single line of code
+  # or a specific dart file by using the `// ignore: name_of_lint` and
+  # `// ignore_for_file: name_of_lint` syntax on the line or in the file
+  # producing the lint.
+  rules:
+    # avoid_print: false  # Uncomment to disable the `avoid_print` rule
+    # prefer_single_quotes: true  # Uncomment to enable the `prefer_single_quotes` rule
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options
--- a/packages/paperless_document_scanner/example/android/.gitignore
+++ b/packages/paperless_document_scanner/example/android/.gitignore
@@ -0,0 +1,13 @@
+gradle-wrapper.jar
+/.gradle
+/captures/
+/gradlew
+/gradlew.bat
+/local.properties
+GeneratedPluginRegistrant.java
+
+# Remember to never publicly share your keystore.
+# See https://flutter.dev/docs/deployment/android#reference-the-keystore-from-the-app
+key.properties
+**/*.keystore
+**/*.jks
--- a/packages/paperless_document_scanner/example/android/app/build.gradle
+++ b/packages/paperless_document_scanner/example/android/app/build.gradle
@@ -0,0 +1,71 @@
+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 plugin: 'kotlin-android'
+apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
+
+android {
+    compileSdkVersion flutter.compileSdkVersion
+    ndkVersion flutter.ndkVersion
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+
+    sourceSets {
+        main.java.srcDirs += 'src/main/kotlin'
+    }
+
+    defaultConfig {
+        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
+        applicationId "de.astubenbord.paperless_document_scanner_example"
+        // You can update the following values to match your application needs.
+        // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
+        minSdkVersion 21
+        targetSdkVersion 31
+        versionCode flutterVersionCode.toInteger()
+        versionName flutterVersionName
+    }
+
+    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 {
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+}
--- a/packages/paperless_document_scanner/example/android/app/src/debug/AndroidManifest.xml
+++ b/packages/paperless_document_scanner/example/android/app/src/debug/AndroidManifest.xml
@@ -0,0 +1,8 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="de.astubenbord.paperless_document_scanner_example">
+    <!-- The INTERNET permission is required for development. Specifically,
+         the Flutter tool needs it to communicate with the running application
+         to allow setting breakpoints, to provide hot reload, etc.
+    -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+</manifest>
--- a/packages/paperless_document_scanner/example/android/app/src/main/AndroidManifest.xml
+++ b/packages/paperless_document_scanner/example/android/app/src/main/AndroidManifest.xml
@@ -0,0 +1,34 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="de.astubenbord.paperless_document_scanner_example">
+   <application
+        android:label="paperless_document_scanner_example"
+        android:name="${applicationName}"
+        android:icon="@mipmap/ic_launcher">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:launchMode="singleTop"
+            android:theme="@style/LaunchTheme"
+            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
+            android:hardwareAccelerated="true"
+            android:windowSoftInputMode="adjustResize">
+            <!-- Specifies an Android theme to apply to this Activity as soon as
+                 the Android process has started. This theme is visible to the user
+                 while the Flutter UI initializes. After that, this theme continues
+                 to determine the Window background behind the Flutter UI. -->
+            <meta-data
+              android:name="io.flutter.embedding.android.NormalTheme"
+              android:resource="@style/NormalTheme"
+              />
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+        <!-- Don't delete the meta-data below.
+             This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
+        <meta-data
+            android:name="flutterEmbedding"
+            android:value="2" />
+    </application>
+</manifest>
--- a/packages/paperless_document_scanner/example/android/app/src/main/kotlin/de/astubenbord/paperless_document_scanner_example/MainActivity.kt
+++ b/packages/paperless_document_scanner/example/android/app/src/main/kotlin/de/astubenbord/paperless_document_scanner_example/MainActivity.kt
@@ -0,0 +1,6 @@
+package de.astubenbord.paperless_document_scanner_example
+
+import io.flutter.embedding.android.FlutterActivity
+
+class MainActivity: FlutterActivity() {
+}
--- a/packages/paperless_document_scanner/example/android/app/src/main/res/drawable-v21/launch_background.xml
+++ b/packages/paperless_document_scanner/example/android/app/src/main/res/drawable-v21/launch_background.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="?android:colorBackground" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>
--- a/packages/paperless_document_scanner/example/android/app/src/main/res/drawable/launch_background.xml
+++ b/packages/paperless_document_scanner/example/android/app/src/main/res/drawable/launch_background.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@android:color/white" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>
--- a/packages/paperless_document_scanner/example/android/app/src/main/res/mipmap-hdpi/ic_launcher.png
+++ b/packages/paperless_document_scanner/example/android/app/src/main/res/mipmap-hdpi/ic_launcher.png
--- a/packages/paperless_document_scanner/example/android/app/src/main/res/mipmap-mdpi/ic_launcher.png
+++ b/packages/paperless_document_scanner/example/android/app/src/main/res/mipmap-mdpi/ic_launcher.png
--- a/packages/paperless_document_scanner/example/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png
+++ b/packages/paperless_document_scanner/example/android/app/src/main/res/mipmap-xhdpi/ic_launcher.png
--- a/packages/paperless_document_scanner/example/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
+++ b/packages/paperless_document_scanner/example/android/app/src/main/res/mipmap-xxhdpi/ic_launcher.png
--- a/packages/paperless_document_scanner/example/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
+++ b/packages/paperless_document_scanner/example/android/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png
--- a/packages/paperless_document_scanner/example/android/app/src/main/res/values-night/styles.xml
+++ b/packages/paperless_document_scanner/example/android/app/src/main/res/values-night/styles.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is on -->
+    <style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <!-- Show a splash screen on the activity. Automatically removed when
+             the Flutter engine draws its first frame -->
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+    <!-- Theme applied to the Android Window as soon as the process has started.
+         This theme determines the color of the Android Window while your
+         Flutter UI initializes, as well as behind your Flutter UI while its
+         running.
+
+         This Theme is only used starting with V2 of Flutter's Android embedding. -->
+    <style name="NormalTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+    </style>
+</resources>
--- a/packages/paperless_document_scanner/example/android/app/src/main/res/values/styles.xml
+++ b/packages/paperless_document_scanner/example/android/app/src/main/res/values/styles.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is off -->
+    <style name="LaunchTheme" parent="@android:style/Theme.Light.NoTitleBar">
+        <!-- Show a splash screen on the activity. Automatically removed when
+             the Flutter engine draws its first frame -->
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+    <!-- Theme applied to the Android Window as soon as the process has started.
+         This theme determines the color of the Android Window while your
+         Flutter UI initializes, as well as behind your Flutter UI while its
+         running.
+
+         This Theme is only used starting with V2 of Flutter's Android embedding. -->
+    <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+    </style>
+</resources>
--- a/packages/paperless_document_scanner/example/android/app/src/profile/AndroidManifest.xml
+++ b/packages/paperless_document_scanner/example/android/app/src/profile/AndroidManifest.xml
@@ -0,0 +1,8 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="de.astubenbord.paperless_document_scanner_example">
+    <!-- The INTERNET permission is required for development. Specifically,
+         the Flutter tool needs it to communicate with the running application
+         to allow setting breakpoints, to provide hot reload, etc.
+    -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+</manifest>
--- a/packages/paperless_document_scanner/example/android/build.gradle
+++ b/packages/paperless_document_scanner/example/android/build.gradle
@@ -0,0 +1,31 @@
+buildscript {
+    ext.kotlin_version = '1.7.10'
+    repositories {
+        google()
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:7.2.0'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+rootProject.buildDir = '../build'
+subprojects {
+    project.buildDir = "${rootProject.buildDir}/${project.name}"
+}
+subprojects {
+    project.evaluationDependsOn(':app')
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}
--- a/packages/paperless_document_scanner/example/android/gradle.properties
+++ b/packages/paperless_document_scanner/example/android/gradle.properties
@@ -0,0 +1,3 @@
+org.gradle.jvmargs=-Xmx1536M
+android.useAndroidX=true
+android.enableJetifier=true
--- a/packages/paperless_document_scanner/example/android/gradle/wrapper/gradle-wrapper.properties
+++ b/packages/paperless_document_scanner/example/android/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.5-all.zip
--- a/packages/paperless_document_scanner/example/android/settings.gradle
+++ b/packages/paperless_document_scanner/example/android/settings.gradle
@@ -0,0 +1,11 @@
+include ':app'
+
+def localPropertiesFile = new File(rootProject.projectDir, "local.properties")
+def properties = new Properties()
+
+assert localPropertiesFile.exists()
+localPropertiesFile.withReader("UTF-8") { reader -> properties.load(reader) }
+
+def flutterSdkPath = properties.getProperty("flutter.sdk")
+assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
+apply from: "$flutterSdkPath/packages/flutter_tools/gradle/app_plugin_loader.gradle"
--- a/packages/paperless_document_scanner/example/ios/.gitignore
+++ b/packages/paperless_document_scanner/example/ios/.gitignore
@@ -0,0 +1,34 @@
+**/dgph
+*.mode1v3
+*.mode2v3
+*.moved-aside
+*.pbxuser
+*.perspectivev3
+**/*sync/
+.sconsign.dblite
+.tags*
+**/.vagrant/
+**/DerivedData/
+Icon?
+**/Pods/
+**/.symlinks/
+profile
+xcuserdata
+**/.generated/
+Flutter/App.framework
+Flutter/Flutter.framework
+Flutter/Flutter.podspec
+Flutter/Generated.xcconfig
+Flutter/ephemeral/
+Flutter/app.flx
+Flutter/app.zip
+Flutter/flutter_assets/
+Flutter/flutter_export_environment.sh
+ServiceDefinitions.json
+Runner/GeneratedPluginRegistrant.*
+
+# Exceptions to above rules.
+!default.mode1v3
+!default.mode2v3
+!default.pbxuser
+!default.perspectivev3
--- a/packages/paperless_document_scanner/example/ios/Flutter/AppFrameworkInfo.plist
+++ b/packages/paperless_document_scanner/example/ios/Flutter/AppFrameworkInfo.plist
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>CFBundleDevelopmentRegion</key>
+  <string>en</string>
+  <key>CFBundleExecutable</key>
+  <string>App</string>
+  <key>CFBundleIdentifier</key>
+  <string>io.flutter.flutter.app</string>
+  <key>CFBundleInfoDictionaryVersion</key>
+  <string>6.0</string>
+  <key>CFBundleName</key>
+  <string>App</string>
+  <key>CFBundlePackageType</key>
+  <string>FMWK</string>
+  <key>CFBundleShortVersionString</key>
+  <string>1.0</string>
+  <key>CFBundleSignature</key>
+  <string>????</string>
+  <key>CFBundleVersion</key>
+  <string>1.0</string>
+  <key>MinimumOSVersion</key>
+  <string>11.0</string>
+</dict>
+</plist>
--- a/packages/paperless_document_scanner/example/ios/Flutter/Debug.xcconfig
+++ b/packages/paperless_document_scanner/example/ios/Flutter/Debug.xcconfig
@@ -0,0 +1 @@
+#include "Generated.xcconfig"
--- a/packages/paperless_document_scanner/example/ios/Flutter/Release.xcconfig
+++ b/packages/paperless_document_scanner/example/ios/Flutter/Release.xcconfig
@@ -0,0 +1 @@
+#include "Generated.xcconfig"
--- a/packages/paperless_document_scanner/example/ios/Runner.xcodeproj/project.pbxproj
+++ b/packages/paperless_document_scanner/example/ios/Runner.xcodeproj/project.pbxproj
@@ -0,0 +1,483 @@
+// !$*UTF8*$!
+{
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+	classes = {
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+	objects = {
+
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+		3B3967161E833CAA004F5970 /* AppFrameworkInfo.plist in Resources */ = {isa = PBXBuildFile; fileRef = 3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */; };
+		74858FAF1ED2DC5600515810 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 74858FAE1ED2DC5600515810 /* AppDelegate.swift */; };
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+		97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FD1CF9000F007C117D /* Assets.xcassets */; };
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+/* End PBXBuildFile section */
+
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+			buildActionMask = 2147483647;
+			dstPath = "";
+			dstSubfolderSpec = 10;
+			files = (
+			);
+			name = "Embed Frameworks";
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXCopyFilesBuildPhase section */
+
+/* Begin PBXFileReference section */
+		1498D2321E8E86230040F4C2 /* GeneratedPluginRegistrant.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = GeneratedPluginRegistrant.h; sourceTree = "<group>"; };
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+		97C147001CF9000F007C117D /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/LaunchScreen.storyboard; sourceTree = "<group>"; };
+		97C147021CF9000F007C117D /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
+/* End PBXFileReference section */
+
+/* Begin PBXFrameworksBuildPhase section */
+		97C146EB1CF9000F007C117D /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXFrameworksBuildPhase section */
+
+/* Begin PBXGroup section */
+		9740EEB11CF90186004384FC /* Flutter */ = {
+			isa = PBXGroup;
+			children = (
+				3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */,
+				9740EEB21CF90195004384FC /* Debug.xcconfig */,
+				7AFA3C8E1D35360C0083082E /* Release.xcconfig */,
+				9740EEB31CF90195004384FC /* Generated.xcconfig */,
+			);
+			name = Flutter;
+			sourceTree = "<group>";
+		};
+		97C146E51CF9000F007C117D = {
+			isa = PBXGroup;
+			children = (
+				9740EEB11CF90186004384FC /* Flutter */,
+				97C146F01CF9000F007C117D /* Runner */,
+				97C146EF1CF9000F007C117D /* Products */,
+			);
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+		};
+		97C146EF1CF9000F007C117D /* Products */ = {
+			isa = PBXGroup;
+			children = (
+				97C146EE1CF9000F007C117D /* Runner.app */,
+			);
+			name = Products;
+			sourceTree = "<group>";
+		};
+		97C146F01CF9000F007C117D /* Runner */ = {
+			isa = PBXGroup;
+			children = (
+				97C146FA1CF9000F007C117D /* Main.storyboard */,
+				97C146FD1CF9000F007C117D /* Assets.xcassets */,
+				97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */,
+				97C147021CF9000F007C117D /* Info.plist */,
+				1498D2321E8E86230040F4C2 /* GeneratedPluginRegistrant.h */,
+				1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */,
+				74858FAE1ED2DC5600515810 /* AppDelegate.swift */,
+				74858FAD1ED2DC5600515810 /* Runner-Bridging-Header.h */,
+			);
+			path = Runner;
+			sourceTree = "<group>";
+		};
+/* End PBXGroup section */
+
+/* Begin PBXNativeTarget section */
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+			buildConfigurationList = 97C147051CF9000F007C117D /* Build configuration list for PBXNativeTarget "Runner" */;
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+				97C146EC1CF9000F007C117D /* Resources */,
+				9705A1C41CF9048500538489 /* Embed Frameworks */,
+				3B06AD1E1E4923F5004D2608 /* Thin Binary */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+			);
+			name = Runner;
+			productName = Runner;
+			productReference = 97C146EE1CF9000F007C117D /* Runner.app */;
+			productType = "com.apple.product-type.application";
+		};
+/* End PBXNativeTarget section */
+
+/* Begin PBXProject section */
+		97C146E61CF9000F007C117D /* Project object */ = {
+			isa = PBXProject;
+			attributes = {
+				LastUpgradeCheck = 1300;
+				ORGANIZATIONNAME = "";
+				TargetAttributes = {
+					97C146ED1CF9000F007C117D = {
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+			buildConfigurationList = 97C146E91CF9000F007C117D /* Build configuration list for PBXProject "Runner" */;
+			compatibilityVersion = "Xcode 9.3";
+			developmentRegion = en;
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+			knownRegions = (
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+			mainGroup = 97C146E51CF9000F007C117D;
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+			projectRoot = "";
+			targets = (
+				97C146ED1CF9000F007C117D /* Runner */,
+			);
+		};
+/* End PBXProject section */
+
+/* Begin PBXResourcesBuildPhase section */
+		97C146EC1CF9000F007C117D /* Resources */ = {
+			isa = PBXResourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				97C147011CF9000F007C117D /* LaunchScreen.storyboard in Resources */,
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+				97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */,
+				97C146FC1CF9000F007C117D /* Main.storyboard in Resources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXResourcesBuildPhase section */
+
+/* Begin PBXShellScriptBuildPhase section */
+		3B06AD1E1E4923F5004D2608 /* Thin Binary */ = {
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+			alwaysOutOfDate = 1;
+			buildActionMask = 2147483647;
+			files = (
+			);
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+			);
+			name = "Thin Binary";
+			outputPaths = (
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+			shellPath = /bin/sh;
+			shellScript = "/bin/sh \"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh\" embed_and_thin";
+		};
+		9740EEB61CF901F6004384FC /* Run Script */ = {
+			isa = PBXShellScriptBuildPhase;
+			alwaysOutOfDate = 1;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputPaths = (
+			);
+			name = "Run Script";
+			outputPaths = (
+			);
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+			shellPath = /bin/sh;
+			shellScript = "/bin/sh \"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh\" build";
+		};
+/* End PBXShellScriptBuildPhase section */
+
+/* Begin PBXSourcesBuildPhase section */
+		97C146EA1CF9000F007C117D /* Sources */ = {
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+			buildActionMask = 2147483647;
+			files = (
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+			);
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+		};
+/* End PBXSourcesBuildPhase section */
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+/* Begin PBXVariantGroup section */
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+			children = (
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+			);
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+				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
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+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
+				CLANG_WARN_EMPTY_BODY = YES;
+				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
+				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
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+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
+				MTL_ENABLE_DEBUG_INFO = NO;
+				SDKROOT = iphoneos;
+				SUPPORTED_PLATFORMS = iphoneos;
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+					"$(inherited)",
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+				);
+				PRODUCT_BUNDLE_IDENTIFIER = de.astubenbord.paperlessDocumentScannerExample;
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+				CLANG_ENABLE_MODULES = YES;
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+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
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+				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
+				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
+				CLANG_WARN_UNREACHABLE_CODE = YES;
+				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
+				COPY_PHASE_STRIP = NO;
+				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
+				ENABLE_NS_ASSERTIONS = NO;
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu99;
+				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
+				MTL_ENABLE_DEBUG_INFO = NO;
+				SDKROOT = iphoneos;
+				SUPPORTED_PLATFORMS = iphoneos;
+				SWIFT_COMPILATION_MODE = wholemodule;
+				SWIFT_OPTIMIZATION_LEVEL = "-O";
+				TARGETED_DEVICE_FAMILY = "1,2";
+				VALIDATE_PRODUCT = YES;
+			};
+			name = Release;
+		};
+		97C147061CF9000F007C117D /* Debug */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 9740EEB21CF90195004384FC /* Debug.xcconfig */;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				CLANG_ENABLE_MODULES = YES;
+				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
+				ENABLE_BITCODE = NO;
+				INFOPLIST_FILE = Runner/Info.plist;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = de.astubenbord.paperlessDocumentScannerExample;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
+				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 5.0;
+				VERSIONING_SYSTEM = "apple-generic";
+			};
+			name = Debug;
+		};
+		97C147071CF9000F007C117D /* Release */ = {
+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 7AFA3C8E1D35360C0083082E /* Release.xcconfig */;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				CLANG_ENABLE_MODULES = YES;
+				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
+				ENABLE_BITCODE = NO;
+				INFOPLIST_FILE = Runner/Info.plist;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = de.astubenbord.paperlessDocumentScannerExample;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
+				SWIFT_VERSION = 5.0;
+				VERSIONING_SYSTEM = "apple-generic";
+			};
+			name = Release;
+		};
+/* End XCBuildConfiguration section */
+
+/* Begin XCConfigurationList section */
+		97C146E91CF9000F007C117D /* Build configuration list for PBXProject "Runner" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				97C147031CF9000F007C117D /* Debug */,
+				97C147041CF9000F007C117D /* Release */,
+				249021D3217E4FDB00AE95B9 /* Profile */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		97C147051CF9000F007C117D /* Build configuration list for PBXNativeTarget "Runner" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				97C147061CF9000F007C117D /* Debug */,
+				97C147071CF9000F007C117D /* Release */,
+				249021D4217E4FDB00AE95B9 /* Profile */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+/* End XCConfigurationList section */
+	};
+	rootObject = 97C146E61CF9000F007C117D /* Project object */;
+}
--- a/packages/paperless_document_scanner/example/ios/Runner.xcodeproj/project.xcworkspace/contents.xcworkspacedata
+++ b/packages/paperless_document_scanner/example/ios/Runner.xcodeproj/project.xcworkspace/contents.xcworkspacedata
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:">
+   </FileRef>
+</Workspace>
--- a/packages/paperless_document_scanner/example/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
+++ b/packages/paperless_document_scanner/example/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>
--- a/packages/paperless_document_scanner/example/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings
+++ b/packages/paperless_document_scanner/example/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>PreviewsEnabled</key>
+	<false/>
+</dict>
+</plist>
--- a/packages/paperless_document_scanner/example/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme
+++ b/packages/paperless_document_scanner/example/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme
@@ -0,0 +1,87 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1300"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+               BuildableName = "Runner.app"
+               BlueprintName = "Runner"
+               ReferencedContainer = "container:Runner.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+            BuildableName = "Runner.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <Testables>
+      </Testables>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+            BuildableName = "Runner.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Profile"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+            BuildableName = "Runner.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>
--- a/packages/paperless_document_scanner/example/ios/Runner.xcworkspace/contents.xcworkspacedata
+++ b/packages/paperless_document_scanner/example/ios/Runner.xcworkspace/contents.xcworkspacedata
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "group:Runner.xcodeproj">
+   </FileRef>
+</Workspace>
--- a/packages/paperless_document_scanner/example/ios/Runner.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
+++ b/packages/paperless_document_scanner/example/ios/Runner.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>
--- a/packages/paperless_document_scanner/example/ios/Runner.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings
+++ b/packages/paperless_document_scanner/example/ios/Runner.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>PreviewsEnabled</key>
+	<false/>
+</dict>
+</plist>
--- a/packages/paperless_document_scanner/example/ios/Runner/AppDelegate.swift
+++ b/packages/paperless_document_scanner/example/ios/Runner/AppDelegate.swift
@@ -0,0 +1,13 @@
+import UIKit
+import Flutter
+
+@UIApplicationMain
+@objc class AppDelegate: FlutterAppDelegate {
+  override func application(
+    _ application: UIApplication,
+    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
+  ) -> Bool {
+    GeneratedPluginRegistrant.register(with: self)
+    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
+  }
+}
--- a/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json
+++ b/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json
@@ -0,0 +1,122 @@
+{
+  "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"
+  }
+}
--- a/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-1024x1024@1x.png
+++ b/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-1024x1024@1x.png
--- a/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@1x.png
+++ b/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@1x.png
--- a/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@2x.png
+++ b/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@2x.png
--- a/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@3x.png
+++ b/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-20x20@3x.png
--- a/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@1x.png
+++ b/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@1x.png
--- a/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@2x.png
+++ b/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@2x.png
--- a/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@3x.png
+++ b/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-29x29@3x.png
--- a/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-40x40@1x.png
+++ b/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-40x40@1x.png
--- a/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-40x40@2x.png
+++ b/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-40x40@2x.png
--- a/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-40x40@3x.png
+++ b/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-40x40@3x.png
--- a/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-60x60@2x.png
+++ b/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-60x60@2x.png
--- a/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-60x60@3x.png
+++ b/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-60x60@3x.png
--- a/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-76x76@1x.png
+++ b/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-76x76@1x.png
--- a/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-76x76@2x.png
+++ b/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-76x76@2x.png
--- a/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-83.5x83.5@2x.png
+++ b/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Icon-App-83.5x83.5@2x.png
--- a/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/Contents.json
+++ b/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/Contents.json
@@ -0,0 +1,23 @@
+{
+  "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"
+  }
+}
--- a/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage.png
+++ b/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage.png
--- a/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@2x.png
+++ b/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@2x.png
--- a/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@3x.png
+++ b/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/LaunchImage@3x.png
--- a/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/README.md
+++ b/packages/paperless_document_scanner/example/ios/Runner/Assets.xcassets/LaunchImage.imageset/README.md
@@ -0,0 +1,5 @@
+# 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.
--- a/packages/paperless_document_scanner/example/ios/Runner/Base.lproj/LaunchScreen.storyboard
+++ b/packages/paperless_document_scanner/example/ios/Runner/Base.lproj/LaunchScreen.storyboard
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="12121" systemVersion="16G29" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
+    <dependencies>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="12089"/>
+    </dependencies>
+    <scenes>
+        <!--View Controller-->
+        <scene sceneID="EHf-IW-A2E">
+            <objects>
+                <viewController id="01J-lp-oVM" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="Ydg-fD-yQy"/>
+                        <viewControllerLayoutGuide type="bottom" id="xbc-2k-c8Z"/>
+                    </layoutGuides>
+                    <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <subviews>
+                            <imageView opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" image="LaunchImage" translatesAutoresizingMaskIntoConstraints="NO" id="YRO-k0-Ey4">
+                            </imageView>
+                        </subviews>
+                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <constraints>
+                            <constraint firstItem="YRO-k0-Ey4" firstAttribute="centerX" secondItem="Ze5-6b-2t3" secondAttribute="centerX" id="1a2-6s-vTC"/>
+                            <constraint firstItem="YRO-k0-Ey4" firstAttribute="centerY" secondItem="Ze5-6b-2t3" secondAttribute="centerY" id="4X2-HB-R7a"/>
+                        </constraints>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="53" y="375"/>
+        </scene>
+    </scenes>
+    <resources>
+        <image name="LaunchImage" width="168" height="185"/>
+    </resources>
+</document>
--- a/packages/paperless_document_scanner/example/ios/Runner/Base.lproj/Main.storyboard
+++ b/packages/paperless_document_scanner/example/ios/Runner/Base.lproj/Main.storyboard
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="10117" systemVersion="15F34" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="BYZ-38-t0r">
+    <dependencies>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="10085"/>
+    </dependencies>
+    <scenes>
+        <!--Flutter View Controller-->
+        <scene sceneID="tne-QT-ifu">
+            <objects>
+                <viewController id="BYZ-38-t0r" customClass="FlutterViewController" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
+                        <viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
+                    </layoutGuides>
+                    <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
+                        <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
+            </objects>
+        </scene>
+    </scenes>
+</document>
--- a/packages/paperless_document_scanner/example/ios/Runner/Info.plist
+++ b/packages/paperless_document_scanner/example/ios/Runner/Info.plist
@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleDisplayName</key>
+	<string>Paperless Document Scanner</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>paperless_document_scanner_example</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>$(FLUTTER_BUILD_NAME)</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>$(FLUTTER_BUILD_NUMBER)</string>
+	<key>LSRequiresIPhoneOS</key>
+	<true/>
+	<key>UILaunchStoryboardName</key>
+	<string>LaunchScreen</string>
+	<key>UIMainStoryboardFile</key>
+	<string>Main</string>
+	<key>UISupportedInterfaceOrientations</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>UISupportedInterfaceOrientations~ipad</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationPortraitUpsideDown</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>UIViewControllerBasedStatusBarAppearance</key>
+	<false/>
+	<key>CADisableMinimumFrameDurationOnPhone</key>
+	<true/>
+	<key>UIApplicationSupportsIndirectInputEvents</key>
+	<true/>
+</dict>
+</plist>
--- a/packages/paperless_document_scanner/example/ios/Runner/Runner-Bridging-Header.h
+++ b/packages/paperless_document_scanner/example/ios/Runner/Runner-Bridging-Header.h
@@ -0,0 +1 @@
+#import "GeneratedPluginRegistrant.h"
--- a/packages/paperless_document_scanner/example/lib/camera_view.dart
+++ b/packages/paperless_document_scanner/example/lib/camera_view.dart
@@ -0,0 +1,19 @@
+import 'package:camera/camera.dart';
+import 'package:flutter/material.dart';
+
+class CameraView extends StatelessWidget {
+  const CameraView({super.key, required this.controller});
+
+  final CameraController controller;
+
+  @override
+  Widget build(BuildContext context) {
+    if (!controller.value.isInitialized) {
+      return Container();
+    }
+
+    return Center(
+      child: CameraPreview(controller),
+    );
+  }
+}
--- a/packages/paperless_document_scanner/example/lib/cropping_preview.dart
+++ b/packages/paperless_document_scanner/example/lib/cropping_preview.dart
@@ -0,0 +1,85 @@
+import 'dart:async';
+import 'dart:io';
+import 'dart:typed_data';
+import 'dart:ui' as ui;
+
+import 'package:flutter/material.dart';
+import 'package:paperless_document_scanner/types/edge_detection_result.dart';
+
+import 'edge_detection_shape/edge_detection_shape.dart';
+
+class ImagePreview extends StatefulWidget {
+  const ImagePreview({
+    super.key,
+    required this.imagePath,
+    required this.edgeDetectionResult,
+  });
+
+  final String imagePath;
+  final EdgeDetectionResult? edgeDetectionResult;
+
+  @override
+  State<ImagePreview> createState() => _ImagePreviewState();
+}
+
+class _ImagePreviewState extends State<ImagePreview> {
+  GlobalKey imageWidgetKey = GlobalKey();
+
+  @override
+  Widget build(BuildContext mainContext) {
+    return Center(
+      child: Stack(
+        fit: StackFit.expand,
+        children: <Widget>[
+          const Center(child: Text('Loading ...')),
+          Image.file(File(widget.imagePath),
+              fit: BoxFit.contain, key: imageWidgetKey),
+          FutureBuilder<ui.Image>(
+              future: loadUiImage(widget.imagePath),
+              builder: (context, snapshot) {
+                if (!snapshot.hasData) {
+                  return const Center(
+                    child: Text("Loading..."),
+                  );
+                } else {
+                  return _getEdgePaint(snapshot.data!, context);
+                }
+              }),
+        ],
+      ),
+    );
+  }
+
+  Widget _getEdgePaint(
+    ui.Image image,
+    BuildContext context,
+  ) {
+    if (widget.edgeDetectionResult == null) return Container();
+
+    final keyContext = imageWidgetKey.currentContext;
+
+    if (keyContext == null) {
+      return Container();
+    }
+
+    final box = keyContext.findRenderObject() as RenderBox;
+
+    return EdgeDetectionShape(
+      originalImageSize: Size(
+        image.width.toDouble(),
+        image.height.toDouble(),
+      ),
+      renderedImageSize: Size(box.size.width, box.size.height),
+      edgeDetectionResult: widget.edgeDetectionResult!,
+    );
+  }
+
+  Future<ui.Image> loadUiImage(String imageAssetPath) async {
+    final Uint8List data = await File(imageAssetPath).readAsBytes();
+    final Completer<ui.Image> completer = Completer();
+    ui.decodeImageFromList(Uint8List.view(data.buffer), (ui.Image image) {
+      return completer.complete(image);
+    });
+    return completer.future;
+  }
+}
--- a/packages/paperless_document_scanner/example/lib/edge_detection_shape/animated_touch_bubble_part.dart
+++ b/packages/paperless_document_scanner/example/lib/edge_detection_shape/animated_touch_bubble_part.dart
@@ -0,0 +1,89 @@
+import 'package:flutter/material.dart';
+
+class AnimatedTouchBubblePart extends StatefulWidget {
+  AnimatedTouchBubblePart({
+    required this.dragging,
+    required this.size,
+  });
+
+  final bool dragging;
+  final double size;
+
+  @override
+  _AnimatedTouchBubblePartState createState() =>
+      _AnimatedTouchBubblePartState();
+}
+
+class _AnimatedTouchBubblePartState extends State<AnimatedTouchBubblePart>
+    with SingleTickerProviderStateMixin {
+  late AnimationController _controller;
+  late Animation<Color?> _colorAnimation;
+  late Animation<double> _sizeAnimation;
+
+  @override
+  void didChangeDependencies() {
+    _controller = AnimationController(
+      duration: const Duration(milliseconds: 1000),
+      vsync: this,
+    );
+
+    _sizeAnimation = Tween<double>(begin: 0.5, end: 1.0).animate(_controller);
+
+    _colorAnimation = ColorTween(
+      begin: Theme.of(context).colorScheme.primary,
+      end: Theme.of(context).colorScheme.primary,
+    ).animate(
+      CurvedAnimation(
+        parent: _controller,
+        curve: Interval(0.5, 1.0),
+      ),
+    );
+
+    _controller.repeat();
+    super.didChangeDependencies();
+  }
+
+  @override
+  void dispose() {
+    _controller.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Stack(
+      children: [
+        Center(
+            child: Container(
+                width: widget.dragging ? 0 : widget.size / 2,
+                height: widget.dragging ? 0 : widget.size / 2,
+                decoration: BoxDecoration(
+                    color: Theme.of(context).accentColor.withOpacity(0.5),
+                    borderRadius: widget.dragging
+                        ? BorderRadius.circular(widget.size)
+                        : BorderRadius.circular(widget.size / 4)))),
+        AnimatedBuilder(
+          builder: (context, child) {
+            return Center(
+                child: Container(
+                    width: widget.dragging
+                        ? 0
+                        : widget.size * _sizeAnimation.value,
+                    height: widget.dragging
+                        ? 0
+                        : widget.size * _sizeAnimation.value,
+                    decoration: BoxDecoration(
+                        border: Border.all(
+                            color: _colorAnimation.value ?? Colors.transparent,
+                            width: widget.size / 20),
+                        borderRadius: widget.dragging
+                            ? BorderRadius.zero
+                            : BorderRadius.circular(
+                                widget.size * _sizeAnimation.value / 2))));
+          },
+          animation: _controller,
+        )
+      ],
+    );
+  }
+}
--- a/packages/paperless_document_scanner/example/lib/edge_detection_shape/edge_detection_shape.dart
+++ b/packages/paperless_document_scanner/example/lib/edge_detection_shape/edge_detection_shape.dart
@@ -0,0 +1,213 @@
+import 'dart:math';
+import 'dart:ui';
+
+import 'package:flutter/material.dart';
+import 'package:paperless_document_scanner/paperless_document_scanner.dart';
+import 'package:paperless_document_scanner/types/edge_detection_result.dart';
+
+import 'edge_painter.dart';
+import 'magnifier.dart' as m;
+import 'touch_bubble.dart';
+
+class EdgeDetectionShape extends StatefulWidget {
+  const EdgeDetectionShape({
+    super.key,
+    required this.renderedImageSize,
+    required this.originalImageSize,
+    required this.edgeDetectionResult,
+  });
+
+  final Size renderedImageSize;
+  final Size originalImageSize;
+  final EdgeDetectionResult edgeDetectionResult;
+
+  @override
+  State<EdgeDetectionShape> createState() => _EdgeDetectionShapeState();
+}
+
+class _EdgeDetectionShapeState extends State<EdgeDetectionShape> {
+  late double edgeDraggerSize;
+
+  List<Offset> points = [];
+
+  late Offset _topLeft;
+  late Offset _topRight;
+  late Offset _bottomLeft;
+  late Offset _bottomRight;
+
+  late double renderedImageWidth;
+  late double renderedImageHeight;
+  late double top;
+  late double left;
+
+  Offset? currentDragPosition;
+
+  @override
+  void didChangeDependencies() {
+    double shortestSide = min(
+        MediaQuery.of(context).size.width, MediaQuery.of(context).size.height);
+    edgeDraggerSize = shortestSide / 12;
+    super.didChangeDependencies();
+  }
+
+  @override
+  void initState() {
+    top = 0.0;
+    left = 0.0;
+    _topLeft = widget.edgeDetectionResult.topLeft;
+    _topRight = widget.edgeDetectionResult.topRight;
+    _bottomLeft = widget.edgeDetectionResult.bottomLeft;
+    _bottomRight = widget.edgeDetectionResult.bottomRight;
+
+    double widthFactor =
+        widget.renderedImageSize.width / widget.originalImageSize.width;
+    double heightFactor =
+        widget.renderedImageSize.height / widget.originalImageSize.height;
+    double sizeFactor = min(widthFactor, heightFactor);
+
+    renderedImageHeight = widget.originalImageSize.height * sizeFactor;
+    top = ((widget.renderedImageSize.height - renderedImageHeight) / 2);
+
+    renderedImageWidth = widget.originalImageSize.width * sizeFactor;
+    left = ((widget.renderedImageSize.width - renderedImageWidth) / 2);
+    super.initState();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return m.Magnifier(
+      visible: currentDragPosition != null,
+      position: currentDragPosition ?? Offset.zero,
+      child: Stack(
+        children: [
+          _buildTouchBubbles(),
+          CustomPaint(
+            painter: EdgePainter(
+              points: points,
+              color: Theme.of(context).colorScheme.primary.withOpacity(0.5),
+            ),
+          )
+        ],
+      ),
+    );
+  }
+
+  Offset _getNewPositionAfterDrag(Offset position) {
+    return Offset(
+      position.dx / renderedImageWidth,
+      position.dy / renderedImageHeight,
+    );
+  }
+
+  Offset _clampOffset(Offset givenOffset) {
+    double absoluteX = givenOffset.dx * renderedImageWidth;
+    double absoluteY = givenOffset.dy * renderedImageHeight;
+
+    return Offset(absoluteX.clamp(0.0, renderedImageWidth) / renderedImageWidth,
+        absoluteY.clamp(0.0, renderedImageHeight) / renderedImageHeight);
+  }
+
+  Widget _buildTouchBubbles() {
+    points = [
+      Offset(
+        left + _topLeft.dx * renderedImageWidth,
+        top + _topLeft.dy * renderedImageHeight,
+      ),
+      Offset(
+        left + _topRight.dx * renderedImageWidth,
+        top + _topRight.dy * renderedImageHeight,
+      ),
+      Offset(
+        left + _bottomRight.dx * renderedImageWidth,
+        top + _bottomRight.dy * renderedImageHeight,
+      ),
+      Offset(
+        left + _bottomLeft.dx * renderedImageWidth,
+        top + _bottomLeft.dy * renderedImageHeight,
+      ),
+      Offset(
+        left + _topLeft.dx * renderedImageWidth,
+        top + _topLeft.dy * renderedImageHeight,
+      ),
+    ];
+
+    return SizedBox(
+      width: widget.renderedImageSize.width,
+      height: widget.renderedImageSize.height,
+      child: Stack(
+        children: [
+          Positioned(
+            left: points[0].dx - (edgeDraggerSize / 2),
+            top: points[0].dy - (edgeDraggerSize / 2),
+            child: TouchBubble(
+              size: edgeDraggerSize,
+              onDragFinished: () => setState(() => currentDragPosition = null),
+              onDrag: (position) {
+                setState(
+                  () {
+                    currentDragPosition = Offset(points[0].dx, points[0].dy);
+                    _topLeft = _clampOffset(
+                      widget.edgeDetectionResult.topLeft +
+                          _getNewPositionAfterDrag(position),
+                    );
+                  },
+                );
+              },
+            ),
+          ),
+          Positioned(
+            left: points[1].dx - (edgeDraggerSize / 2),
+            top: points[1].dy - (edgeDraggerSize / 2),
+            child: TouchBubble(
+              size: edgeDraggerSize,
+              onDrag: (position) {
+                setState(() {
+                  currentDragPosition = Offset(points[1].dx, points[1].dy);
+                  _topRight = _clampOffset(
+                    widget.edgeDetectionResult.topRight +
+                        _getNewPositionAfterDrag(position),
+                  );
+                });
+              },
+              onDragFinished: () => setState(() => currentDragPosition = null),
+            ),
+          ),
+          Positioned(
+            left: points[2].dx - (edgeDraggerSize / 2),
+            top: points[2].dy - (edgeDraggerSize / 2),
+            child: TouchBubble(
+              size: edgeDraggerSize,
+              onDrag: (position) {
+                setState(() {
+                  currentDragPosition = Offset(points[2].dx, points[2].dy);
+                  _bottomRight = _clampOffset(
+                    widget.edgeDetectionResult.bottomRight +
+                        _getNewPositionAfterDrag(position),
+                  );
+                });
+              },
+              onDragFinished: () => setState(() => currentDragPosition = null),
+            ),
+          ),
+          Positioned(
+            left: points[3].dx - (edgeDraggerSize / 2),
+            top: points[3].dy - (edgeDraggerSize / 2),
+            child: TouchBubble(
+              size: edgeDraggerSize,
+              onDrag: (position) {
+                setState(() {
+                  _bottomLeft = _clampOffset(
+                    widget.edgeDetectionResult.bottomLeft +
+                        _getNewPositionAfterDrag(position),
+                  );
+                  currentDragPosition = Offset(points[3].dx, points[3].dy);
+                });
+              },
+              onDragFinished: () => setState(() => currentDragPosition = null),
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}
--- a/packages/paperless_document_scanner/example/lib/edge_detection_shape/edge_painter.dart
+++ b/packages/paperless_document_scanner/example/lib/edge_detection_shape/edge_painter.dart
@@ -0,0 +1,25 @@
+import 'dart:ui';
+
+import 'package:flutter/material.dart';
+
+class EdgePainter extends CustomPainter {
+  EdgePainter({required this.points, required this.color});
+
+  final List<Offset> points;
+  final Color color;
+
+  @override
+  void paint(Canvas canvas, Size size) {
+    final paint = Paint()
+      ..color = color.withOpacity(0.5)
+      ..strokeWidth = 2
+      ..strokeCap = StrokeCap.round;
+
+    canvas.drawPoints(PointMode.polygon, points, paint);
+  }
+
+  @override
+  bool shouldRepaint(CustomPainter oldDelegate) {
+    return true;
+  }
+}
--- a/packages/paperless_document_scanner/example/lib/edge_detection_shape/magnifier.dart
+++ b/packages/paperless_document_scanner/example/lib/edge_detection_shape/magnifier.dart
@@ -0,0 +1,100 @@
+import 'dart:ui';
+import 'package:flutter/material.dart';
+
+import 'magnifier_painter.dart';
+
+class Magnifier extends StatefulWidget {
+  const Magnifier({
+    super.key,
+    required this.child,
+    required this.position,
+    this.visible = true,
+    this.scale = 1.5,
+    this.size = const Size(160, 160),
+  });
+
+  final Widget child;
+  final Offset position;
+  final bool visible;
+  final double scale;
+  final Size size;
+
+  @override
+  _MagnifierState createState() => _MagnifierState();
+}
+
+class _MagnifierState extends State<Magnifier> {
+  late Size _magnifierSize;
+  late double _scale;
+  late Matrix4 _matrix;
+
+  @override
+  void initState() {
+    _magnifierSize = widget.size;
+    _scale = widget.scale;
+    _calculateMatrix();
+
+    super.initState();
+  }
+
+  @override
+  void didUpdateWidget(Magnifier oldWidget) {
+    super.didUpdateWidget(oldWidget);
+
+    _calculateMatrix();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Stack(
+      children: [
+        widget.child,
+        if (widget.visible && widget.position != null) _getMagnifier(context)
+      ],
+    );
+  }
+
+  void _calculateMatrix() {
+    if (widget.position == null) {
+      return;
+    }
+
+    setState(() {
+      double newX = widget.position.dx - (_magnifierSize.width / 2 / _scale);
+      double newY = widget.position.dy - (_magnifierSize.height / 2 / _scale);
+
+      final Matrix4 updatedMatrix = Matrix4.identity()
+        ..scale(_scale, _scale)
+        ..translate(-newX, -newY);
+
+      _matrix = updatedMatrix;
+    });
+  }
+
+  Widget _getMagnifier(BuildContext context) {
+    return Align(
+      alignment: _getAlignment(),
+      child: ClipOval(
+        child: BackdropFilter(
+          filter: ImageFilter.matrix(_matrix.storage),
+          child: CustomPaint(
+            painter: MagnifierPainter(color: Theme.of(context).accentColor),
+            size: _magnifierSize,
+          ),
+        ),
+      ),
+    );
+  }
+
+  Alignment _getAlignment() {
+    if (_bubbleCrossesMagnifier()) {
+      return Alignment.topRight;
+    }
+
+    return Alignment.topLeft;
+  }
+
+  bool _bubbleCrossesMagnifier() =>
+      widget.position.dx < widget.size.width &&
+      widget.position.dy < widget.size.height;
+}
--- a/packages/paperless_document_scanner/example/lib/edge_detection_shape/magnifier_painter.dart
+++ b/packages/paperless_document_scanner/example/lib/edge_detection_shape/magnifier_painter.dart
@@ -0,0 +1,43 @@
+import 'package:flutter/material.dart';
+
+class MagnifierPainter extends CustomPainter {
+  const MagnifierPainter({required this.color, this.strokeWidth = 5});
+
+  final double strokeWidth;
+  final Color color;
+
+  @override
+  void paint(Canvas canvas, Size size) {
+    _drawCircle(canvas, size);
+    _drawCrosshair(canvas, size);
+  }
+
+  void _drawCircle(Canvas canvas, Size size) {
+    Paint paintObject = Paint()
+      ..style = PaintingStyle.stroke
+      ..strokeWidth = strokeWidth
+      ..color = color;
+
+    canvas.drawCircle(
+        size.center(Offset(0, 0)), size.longestSide / 2, paintObject);
+  }
+
+  void _drawCrosshair(Canvas canvas, Size size) {
+    Paint crossPaint = Paint()
+      ..strokeWidth = strokeWidth / 2
+      ..color = color;
+
+    double crossSize = size.longestSide * 0.04;
+
+    canvas.drawLine(size.center(Offset(-crossSize, -crossSize)),
+        size.center(Offset(crossSize, crossSize)), crossPaint);
+
+    canvas.drawLine(size.center(Offset(crossSize, -crossSize)),
+        size.center(Offset(-crossSize, crossSize)), crossPaint);
+  }
+
+  @override
+  bool shouldRepaint(CustomPainter oldDelegate) {
+    return true;
+  }
+}
--- a/packages/paperless_document_scanner/example/lib/edge_detection_shape/touch_bubble.dart
+++ b/packages/paperless_document_scanner/example/lib/edge_detection_shape/touch_bubble.dart
@@ -0,0 +1,66 @@
+import 'package:flutter/material.dart';
+
+import 'animated_touch_bubble_part.dart';
+
+class TouchBubble extends StatefulWidget {
+  const TouchBubble({
+    super.key,
+    required this.size,
+    required this.onDrag,
+    required this.onDragFinished,
+  });
+
+  final double size;
+  final Function onDrag;
+  final Function onDragFinished;
+
+  @override
+  State<TouchBubble> createState() => _TouchBubbleState();
+}
+
+class _TouchBubbleState extends State<TouchBubble> {
+  bool dragging = false;
+
+  @override
+  Widget build(BuildContext context) {
+    return GestureDetector(
+        behavior: HitTestBehavior.opaque,
+        onPanStart: _startDragging,
+        onPanUpdate: _drag,
+        onPanCancel: _cancelDragging,
+        onPanEnd: (_) => _cancelDragging(),
+        child: Container(
+            width: widget.size,
+            height: widget.size,
+            decoration: BoxDecoration(
+                color: Colors.transparent,
+                borderRadius: BorderRadius.circular(widget.size / 2)),
+            child: AnimatedTouchBubblePart(
+              dragging: dragging,
+              size: widget.size,
+            )));
+  }
+
+  void _startDragging(DragStartDetails data) {
+    setState(() {
+      dragging = true;
+    });
+    widget
+        .onDrag(data.localPosition - Offset(widget.size / 2, widget.size / 2));
+  }
+
+  void _cancelDragging() {
+    setState(() {
+      dragging = false;
+    });
+    widget.onDragFinished();
+  }
+
+  void _drag(DragUpdateDetails data) {
+    if (!dragging) {
+      return;
+    }
+
+    widget.onDrag(data.delta);
+  }
+}
--- a/packages/paperless_document_scanner/example/lib/edge_detector.dart
+++ b/packages/paperless_document_scanner/example/lib/edge_detector.dart
@@ -0,0 +1,130 @@
+import 'dart:async';
+import 'dart:isolate';
+import 'dart:typed_data';
+
+import 'package:paperless_document_scanner/paperless_document_scanner.dart';
+import 'package:paperless_document_scanner/types/edge_detection_result.dart';
+
+class EdgeDetector {
+  static Future<void> startEdgeDetectionFromFileIsolate(
+    EdgeDetectionFromFileInput edgeDetectionInput,
+  ) async {
+    EdgeDetectionResult result =
+        await EdgeDetection.detectEdgesFromFile(edgeDetectionInput.inputPath);
+    edgeDetectionInput.sendPort.send(result);
+  }
+
+  static Future<void> startEdgeDetectionIsolate(
+    EdgeDetectionInput edgeDetectionInput,
+  ) async {
+    EdgeDetectionResult result =
+        await EdgeDetection.detectEdges(edgeDetectionInput.bytes);
+    edgeDetectionInput.sendPort.send(result);
+  }
+
+  static Future<void> processImageIsolate(
+      ProcessImageInput processImageInput) async {
+    ImageProcessing.processImage(
+      processImageInput.bytes,
+      processImageInput.edgeDetectionResult,
+    );
+    processImageInput.sendPort.send(true);
+  }
+
+  Future<EdgeDetectionResult> detectEdgesFromFile(String filePath) async {
+    final port = ReceivePort();
+
+    _spawnIsolate<EdgeDetectionInput>(
+      startEdgeDetectionIsolate,
+      EdgeDetectionFromFileInput(
+        inputPath: filePath,
+        sendPort: port.sendPort,
+      ),
+      port,
+    );
+
+    return await _subscribeToPort<EdgeDetectionResult>(port);
+  }
+
+  Future<bool> processImageFromFile(
+      String filePath, EdgeDetectionResult edgeDetectionResult) async {
+    final port = ReceivePort();
+
+    _spawnIsolate<ProcessImageInput>(
+        processImageIsolate,
+        ProcessImageFromFileInput(
+            inputPath: filePath,
+            edgeDetectionResult: edgeDetectionResult,
+            sendPort: port.sendPort),
+        port);
+
+    return await _subscribeToPort<bool>(port);
+  }
+
+  void _spawnIsolate<T>(
+    void Function(T) function,
+    dynamic input,
+    ReceivePort port,
+  ) {
+    Isolate.spawn<T>(function, input,
+        onError: port.sendPort, onExit: port.sendPort);
+  }
+
+  Future<T> _subscribeToPort<T>(ReceivePort port) async {
+    late StreamSubscription sub;
+
+    var completer = Completer<T>();
+
+    sub = port.listen((result) async {
+      print(result);
+      await sub.cancel();
+      completer.complete(await result);
+    });
+
+    return completer.future;
+  }
+}
+
+class EdgeDetectionFromFileInput {
+  EdgeDetectionFromFileInput({
+    required this.inputPath,
+    required this.sendPort,
+  });
+
+  final String inputPath;
+  final SendPort sendPort;
+}
+
+class EdgeDetectionInput {
+  EdgeDetectionInput({
+    required this.bytes,
+    required this.sendPort,
+  });
+
+  final Uint8List bytes;
+  final SendPort sendPort;
+}
+
+class ProcessImageInput {
+  ProcessImageInput({
+    required this.bytes,
+    required this.edgeDetectionResult,
+    required this.sendPort,
+  });
+
+  final Uint8List bytes;
+  final EdgeDetectionResult edgeDetectionResult;
+  final SendPort sendPort;
+}
+
+class ProcessImageFromFileInput {
+  ProcessImageFromFileInput({
+    required this.inputPath,
+    required this.edgeDetectionResult,
+    required this.sendPort,
+  });
+
+  final String inputPath;
+  final EdgeDetectionResult edgeDetectionResult;
+  final SendPort sendPort;
+}
--- a/packages/paperless_document_scanner/example/lib/image_view.dart
+++ b/packages/paperless_document_scanner/example/lib/image_view.dart
@@ -0,0 +1,25 @@
+import 'dart:io';
+import 'package:flutter/material.dart';
+
+class ImageView extends StatefulWidget {
+  const ImageView({super.key, required this.imagePath});
+
+  final String imagePath;
+
+  @override
+  State<ImageView> createState() => _ImageViewState();
+}
+
+class _ImageViewState extends State<ImageView> {
+  GlobalKey imageWidgetKey = GlobalKey();
+
+  @override
+  Widget build(BuildContext mainContext) {
+    return Center(
+      child: Image.file(
+        File(widget.imagePath),
+        fit: BoxFit.contain,
+      ),
+    );
+  }
+}
--- a/packages/paperless_document_scanner/example/lib/main.dart
+++ b/packages/paperless_document_scanner/example/lib/main.dart
@@ -0,0 +1,113 @@
+import 'dart:typed_data';
+
+import 'package:camera/camera.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import 'package:image/image.dart' as imglib;
+import 'scan.dart';
+
+late final List<CameraDescription> cameras;
+void main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+  cameras = await availableCameras();
+  runApp(const EdgeDetectionApp());
+}
+
+class EdgeDetectionApp extends StatefulWidget {
+  const EdgeDetectionApp({super.key});
+
+  @override
+  State<EdgeDetectionApp> createState() => _EdgeDetectionAppState();
+}
+
+class _EdgeDetectionAppState extends State<EdgeDetectionApp> {
+  CameraImage? _image;
+  late final CameraController _controller;
+
+  @override
+  void initState() {
+    super.initState();
+
+    () async {
+      _controller = CameraController(
+        cameras
+            .where(
+                (element) => element.lensDirection == CameraLensDirection.back)
+            .first,
+        ResolutionPreset.low,
+        enableAudio: false,
+      );
+      await _controller.initialize();
+      _controller.startImageStream((image) {
+        setState(() => _image = image);
+      });
+    }();
+  }
+
+  Uint8List concatenatePlanes(List<Plane> planes) {
+    final WriteBuffer allBytes = WriteBuffer();
+    for (final plane in planes) {
+      allBytes.putUint8List(plane.bytes);
+    }
+    return allBytes.done().buffer.asUint8List();
+  }
+
+  Image convertYUV420toImageColor(CameraImage image) {
+    final int width = image.width;
+    final int height = image.height;
+    final int uvRowStride = image.planes[1].bytesPerRow;
+    final int uvPixelStride = image.planes[1].bytesPerPixel!;
+
+    print("uvRowStride: " + uvRowStride.toString());
+    print("uvPixelStride: " + uvPixelStride.toString());
+
+    // imgLib -> Image package from https://pub.dartlang.org/packages/image
+    var img = imglib.Image(
+      width: width,
+      height: height,
+    ); // Create Image buffer
+
+    // Fill image buffer with plane[0] from YUV420_888
+    for (int x = 0; x < width; x++) {
+      for (int y = 0; y < height; y++) {
+        final int uvIndex =
+            uvPixelStride * (x / 2).floor() + uvRowStride * (y / 2).floor();
+        final int index = y * width + x;
+
+        final yp = image.planes[0].bytes[index];
+        final up = image.planes[1].bytes[uvIndex];
+        final vp = image.planes[2].bytes[uvIndex];
+        // Calculate pixel color
+        int r = (yp + vp * 1436 / 1024 - 179).round().clamp(0, 255);
+        int g = (yp - up * 46549 / 131072 + 44 - vp * 93604 / 131072 + 91)
+            .round()
+            .clamp(0, 255);
+        int b = (yp + up * 1814 / 1024 - 227).round().clamp(0, 255);
+        // color: 0x FF  FF  FF  FF
+        //           A   B   G   R
+        img.data?.setPixelRgb(x, y, r, g, b);
+      }
+    }
+
+    imglib.PngEncoder pngEncoder = new imglib.PngEncoder(level: 0);
+    final png = pngEncoder.encode(img);
+    return Image.memory(png);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: 'Flutter Demo',
+      theme: ThemeData(
+        visualDensity: VisualDensity.adaptivePlatformDensity,
+      ),
+      home: Scaffold(
+        body: Center(
+          child: _image != null
+              ? convertYUV420toImageColor(_image!)
+              : Placeholder(),
+        ),
+      ),
+    );
+  }
+}
--- a/packages/paperless_document_scanner/example/lib/scan.dart
+++ b/packages/paperless_document_scanner/example/lib/scan.dart
@@ -0,0 +1,174 @@
+import 'dart:async';
+import 'dart:developer';
+
+import 'package:camera/camera.dart';
+import 'package:flutter/material.dart';
+import 'package:paperless_document_scanner/types/edge_detection_result.dart';
+
+import 'camera_view.dart';
+import 'cropping_preview.dart';
+import 'edge_detector.dart';
+import 'image_view.dart';
+
+class Scan extends StatefulWidget {
+  const Scan({
+    super.key,
+    required,
+    required this.cameras,
+  });
+  final List<CameraDescription> cameras;
+  @override
+  State<Scan> createState() => _ScanState();
+}
+
+class _ScanState extends State<Scan> {
+  late final CameraController controller;
+  String? imagePath;
+  String? croppedImagePath;
+  EdgeDetectionResult? edgeDetectionResult;
+
+  @override
+  void initState() {
+    super.initState();
+    controller = CameraController(
+      widget.cameras[0],
+      ResolutionPreset.veryHigh,
+      imageFormatGroup: ImageFormatGroup.jpeg,
+      enableAudio: false,
+    );
+    () async {
+      await controller.initialize();
+      log(controller.value.toString());
+    }();
+  }
+
+  @override
+  void dispose() {
+    controller.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: Stack(
+        children: <Widget>[
+          _getMainWidget(),
+          _getBottomBar(),
+        ],
+      ),
+    );
+  }
+
+  Widget _getMainWidget() {
+    if (croppedImagePath != null) {
+      return ImageView(imagePath: croppedImagePath!);
+    }
+
+    if (imagePath == null && edgeDetectionResult == null) {
+      return CameraView(controller: controller);
+    }
+
+    return ImagePreview(
+      imagePath: imagePath!,
+      edgeDetectionResult: edgeDetectionResult,
+    );
+  }
+
+  Widget _getButtonRow() {
+    if (imagePath != null) {
+      return Align(
+        alignment: Alignment.bottomCenter,
+        child: FloatingActionButton(
+          child: Icon(Icons.check),
+          onPressed: () async {
+            if (croppedImagePath == null) {
+              return _processImage(imagePath!, edgeDetectionResult!);
+            }
+
+            setState(() {
+              imagePath = null;
+              edgeDetectionResult = null;
+              croppedImagePath = null;
+            });
+          },
+        ),
+      );
+    }
+
+    return Row(
+      mainAxisAlignment: MainAxisAlignment.center,
+      children: [
+        FloatingActionButton(
+          foregroundColor: Colors.white,
+          child: Icon(Icons.camera_alt),
+          onPressed: onTakePictureButtonPressed,
+        ),
+      ],
+    );
+  }
+
+  String timestamp() => DateTime.now().millisecondsSinceEpoch.toString();
+
+  Future<String> takePicture() async {
+    if (!controller.value.isInitialized) {
+      throw Exception("Select camera first!");
+    }
+
+    final file = await controller.takePicture();
+
+    return file.path;
+  }
+
+  Future _detectEdges(String filePath) async {
+    if (!mounted) {
+      return;
+    }
+
+    setState(() {
+      imagePath = filePath;
+    });
+
+    EdgeDetectionResult result =
+        await EdgeDetector().detectEdgesFromFile(filePath);
+
+    setState(() {
+      edgeDetectionResult = result;
+    });
+  }
+
+  Future _processImage(
+      String filePath, EdgeDetectionResult edgeDetectionResult) async {
+    if (!mounted) {
+      return;
+    }
+
+    bool result = await EdgeDetector()
+        .processImageFromFile(filePath, edgeDetectionResult);
+
+    if (result == false) {
+      return;
+    }
+
+    setState(() {
+      imageCache.clearLiveImages();
+      imageCache.clear();
+      croppedImagePath = imagePath;
+    });
+  }
+
+  void onTakePictureButtonPressed() async {
+    String filePath = await takePicture();
+
+    log('Picture saved to $filePath');
+
+    await _detectEdges(filePath);
+  }
+
+  Padding _getBottomBar() {
+    return Padding(
+      padding: EdgeInsets.only(bottom: 32),
+      child: Align(alignment: Alignment.bottomCenter, child: _getButtonRow()),
+    );
+  }
+}
--- a/packages/paperless_document_scanner/example/pubspec.lock
+++ b/packages/paperless_document_scanner/example/pubspec.lock
@@ -0,0 +1,441 @@
+# Generated by pub
+# See https://dart.dev/tools/pub/glossary#lockfile
+packages:
+  archive:
+    dependency: transitive
+    description:
+      name: archive
+      sha256: d6347d54a2d8028e0437e3c099f66fdb8ae02c4720c1e7534c9f24c10351f85d
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.3.6"
+  async:
+    dependency: transitive
+    description:
+      name: async
+      sha256: bfe67ef28df125b7dddcea62755991f807aa39a2492a23e1550161692950bbe0
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.10.0"
+  boolean_selector:
+    dependency: transitive
+    description:
+      name: boolean_selector
+      sha256: "6cfb5af12253eaf2b368f07bacc5a80d1301a071c73360d746b7f2e32d762c66"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.1"
+  camera:
+    dependency: "direct main"
+    description:
+      name: camera
+      sha256: e7ac55af24a890d20276821eb3c95857074d03b7de6f9892b99a205ee30bd179
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.10.3"
+  camera_android:
+    dependency: transitive
+    description:
+      name: camera_android
+      sha256: e491c836147f60dd8a54cf3895fd2960e13b21b78a9d15b563a1b6c70894f142
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.10.4"
+  camera_avfoundation:
+    dependency: transitive
+    description:
+      name: camera_avfoundation
+      sha256: "6a68c20593d4cd58974d555f74a48b244f9db28cc9156de57781122d11b8754b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.9.11"
+  camera_platform_interface:
+    dependency: transitive
+    description:
+      name: camera_platform_interface
+      sha256: b632be28e61d00a233f67d98ea90fd7041956f27a1c65500188ee459be60e15f
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.0"
+  camera_web:
+    dependency: transitive
+    description:
+      name: camera_web
+      sha256: "496de93c5d462738ce991dbfe91fb19026f115ed36406700a20a380fb0018299"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.3.1+1"
+  characters:
+    dependency: transitive
+    description:
+      name: characters
+      sha256: e6a326c8af69605aec75ed6c187d06b349707a27fbff8222ca9cc2cff167975c
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.1"
+  clock:
+    dependency: transitive
+    description:
+      name: clock
+      sha256: cb6d7f03e1de671e34607e909a7213e31d7752be4fb66a86d29fe1eb14bfb5cf
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.1"
+  collection:
+    dependency: transitive
+    description:
+      name: collection
+      sha256: cfc915e6923fe5ce6e153b0723c753045de46de1b4d63771530504004a45fae0
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.17.0"
+  convert:
+    dependency: transitive
+    description:
+      name: convert
+      sha256: "0f08b14755d163f6e2134cb58222dd25ea2a2ee8a195e53983d57c075324d592"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.1"
+  cross_file:
+    dependency: transitive
+    description:
+      name: cross_file
+      sha256: "0b0036e8cccbfbe0555fd83c1d31a6f30b77a96b598b35a5d36dd41f718695e9"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.3.3+4"
+  crypto:
+    dependency: transitive
+    description:
+      name: crypto
+      sha256: aa274aa7774f8964e4f4f38cc994db7b6158dd36e9187aaceaddc994b35c6c67
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.2"
+  cupertino_icons:
+    dependency: "direct main"
+    description:
+      name: cupertino_icons
+      sha256: e35129dc44c9118cee2a5603506d823bab99c68393879edb440e0090d07586be
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.5"
+  fake_async:
+    dependency: transitive
+    description:
+      name: fake_async
+      sha256: "511392330127add0b769b75a987850d136345d9227c6b94c96a04cf4a391bf78"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.3.1"
+  ffi:
+    dependency: transitive
+    description:
+      name: ffi
+      sha256: a38574032c5f1dd06c4aee541789906c12ccaab8ba01446e800d9c5b79c4a978
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.1"
+  file:
+    dependency: transitive
+    description:
+      name: file
+      sha256: "1b92bec4fc2a72f59a8e15af5f52cd441e4a7860b49499d69dfa817af20e925d"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.1.4"
+  flutter:
+    dependency: "direct main"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  flutter_lints:
+    dependency: "direct dev"
+    description:
+      name: flutter_lints
+      sha256: aeb0b80a8b3709709c9cc496cdc027c5b3216796bc0af0ce1007eaf24464fd4c
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.1"
+  flutter_plugin_android_lifecycle:
+    dependency: transitive
+    description:
+      name: flutter_plugin_android_lifecycle
+      sha256: "60fc7b78455b94e6de2333d2f95196d32cf5c22f4b0b0520a628804cb463503b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.7"
+  flutter_test:
+    dependency: "direct dev"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  flutter_web_plugins:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  image:
+    dependency: "direct main"
+    description:
+      name: image
+      sha256: "483a389d6ccb292b570c31b3a193779b1b0178e7eb571986d9a49904b6861227"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.0.15"
+  js:
+    dependency: transitive
+    description:
+      name: js
+      sha256: "5528c2f391ededb7775ec1daa69e65a2d61276f7552de2b5f7b8d34ee9fd4ab7"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.6.5"
+  lints:
+    dependency: transitive
+    description:
+      name: lints
+      sha256: "5e4a9cd06d447758280a8ac2405101e0e2094d2a1dbdd3756aec3fe7775ba593"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.1"
+  matcher:
+    dependency: transitive
+    description:
+      name: matcher
+      sha256: "16db949ceee371e9b99d22f88fa3a73c4e59fd0afed0bd25fc336eb76c198b72"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.12.13"
+  material_color_utilities:
+    dependency: transitive
+    description:
+      name: material_color_utilities
+      sha256: d92141dc6fe1dad30722f9aa826c7fbc896d021d792f80678280601aff8cf724
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.0"
+  meta:
+    dependency: transitive
+    description:
+      name: meta
+      sha256: "6c268b42ed578a53088d834796959e4a1814b5e9e164f147f580a386e5decf42"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.8.0"
+  paperless_document_scanner:
+    dependency: "direct main"
+    description:
+      path: ".."
+      relative: true
+    source: path
+    version: "0.0.1"
+  path:
+    dependency: transitive
+    description:
+      name: path
+      sha256: db9d4f58c908a4ba5953fcee2ae317c94889433e5024c27ce74a37f94267945b
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.8.2"
+  path_provider:
+    dependency: "direct main"
+    description:
+      name: path_provider
+      sha256: dcea5feb97d8abf90cab9e9030b497fb7c3cbf26b7a1fe9e3ef7dcb0a1ddec95
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.12"
+  path_provider_android:
+    dependency: transitive
+    description:
+      name: path_provider_android
+      sha256: a776c088d671b27f6e3aa8881d64b87b3e80201c64e8869b811325de7a76c15e
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.22"
+  path_provider_foundation:
+    dependency: transitive
+    description:
+      name: path_provider_foundation
+      sha256: "62a68e7e1c6c459f9289859e2fae58290c981ce21d1697faf54910fe1faa4c74"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.1"
+  path_provider_linux:
+    dependency: transitive
+    description:
+      name: path_provider_linux
+      sha256: "2e32f1640f07caef0d3cb993680f181c79e54a3827b997d5ee221490d131fbd9"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.8"
+  path_provider_platform_interface:
+    dependency: transitive
+    description:
+      name: path_provider_platform_interface
+      sha256: f0abc8ebd7253741f05488b4813d936b4d07c6bae3e86148a09e342ee4b08e76
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.5"
+  path_provider_windows:
+    dependency: transitive
+    description:
+      name: path_provider_windows
+      sha256: bcabbe399d4042b8ee687e17548d5d3f527255253b4a639f5f8d2094a9c2b45c
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.3"
+  petitparser:
+    dependency: transitive
+    description:
+      name: petitparser
+      sha256: "49392a45ced973e8d94a85fdb21293fbb40ba805fc49f2965101ae748a3683b4"
+      url: "https://pub.dev"
+    source: hosted
+    version: "5.1.0"
+  platform:
+    dependency: transitive
+    description:
+      name: platform
+      sha256: "4a451831508d7d6ca779f7ac6e212b4023dd5a7d08a27a63da33756410e32b76"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.0"
+  plugin_platform_interface:
+    dependency: transitive
+    description:
+      name: plugin_platform_interface
+      sha256: dbf0f707c78beedc9200146ad3cb0ab4d5da13c246336987be6940f026500d3a
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.3"
+  pointycastle:
+    dependency: transitive
+    description:
+      name: pointycastle
+      sha256: db7306cf0249f838d1a24af52b5a5887c5bf7f31d8bb4e827d071dc0939ad346
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.6.2"
+  process:
+    dependency: transitive
+    description:
+      name: process
+      sha256: "53fd8db9cec1d37b0574e12f07520d582019cb6c44abf5479a01505099a34a09"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.2.4"
+  quiver:
+    dependency: transitive
+    description:
+      name: quiver
+      sha256: b1c1ac5ce6688d77f65f3375a9abb9319b3cb32486bdc7a1e0fdf004d7ba4e47
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.1"
+  sky_engine:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.99"
+  source_span:
+    dependency: transitive
+    description:
+      name: source_span
+      sha256: dd904f795d4b4f3b870833847c461801f6750a9fa8e61ea5ac53f9422b31f250
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.9.1"
+  stack_trace:
+    dependency: transitive
+    description:
+      name: stack_trace
+      sha256: c3c7d8edb15bee7f0f74debd4b9c5f3c2ea86766fe4178eb2a18eb30a0bdaed5
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.11.0"
+  stream_channel:
+    dependency: transitive
+    description:
+      name: stream_channel
+      sha256: "83615bee9045c1d322bbbd1ba209b7a749c2cbcdcb3fdd1df8eb488b3279c1c8"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.1"
+  stream_transform:
+    dependency: transitive
+    description:
+      name: stream_transform
+      sha256: "14a00e794c7c11aa145a170587321aedce29769c08d7f58b1d141da75e3b1c6f"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.0"
+  string_scanner:
+    dependency: transitive
+    description:
+      name: string_scanner
+      sha256: "556692adab6cfa87322a115640c11f13cb77b3f076ddcc5d6ae3c20242bedcde"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.0"
+  term_glyph:
+    dependency: transitive
+    description:
+      name: term_glyph
+      sha256: a29248a84fbb7c79282b40b8c72a1209db169a2e0542bce341da992fe1bc7e84
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.1"
+  test_api:
+    dependency: transitive
+    description:
+      name: test_api
+      sha256: ad540f65f92caa91bf21dfc8ffb8c589d6e4dc0c2267818b4cc2792857706206
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.4.16"
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      sha256: "26f87ade979c47a150c9eaab93ccd2bebe70a27dc0b4b29517f2904f04eb11a5"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.3.1"
+  vector_math:
+    dependency: transitive
+    description:
+      name: vector_math
+      sha256: "80b3257d1492ce4d091729e3a67a60407d227c27241d6927be0130c98e741803"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.4"
+  win32:
+    dependency: transitive
+    description:
+      name: win32
+      sha256: c9ebe7ee4ab0c2194e65d3a07d8c54c5d00bb001b76081c4a04cdb8448b59e46
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.3"
+  xdg_directories:
+    dependency: transitive
+    description:
+      name: xdg_directories
+      sha256: ee1505df1426458f7f60aac270645098d318a8b4766d85fde75f76f2e21807d1
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.0"
+  xml:
+    dependency: transitive
+    description:
+      name: xml
+      sha256: "979ee37d622dec6365e2efa4d906c37470995871fe9ae080d967e192d88286b5"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.2.2"
+sdks:
+  dart: ">=2.19.2 <3.0.0"
+  flutter: ">=3.0.0"
--- a/packages/paperless_document_scanner/example/pubspec.yaml
+++ b/packages/paperless_document_scanner/example/pubspec.yaml
@@ -0,0 +1,86 @@
+name: paperless_document_scanner_example
+description: Demonstrates how to use the paperless_document_scanner plugin.
+# The following line prevents the package from being accidentally published to
+# pub.dev using `flutter pub publish`. This is preferred for private packages.
+publish_to: 'none' # Remove this line if you wish to publish to pub.dev
+
+environment:
+  sdk: '>=2.19.2 <3.0.0'
+
+# Dependencies specify other packages that your package needs in order to work.
+# To automatically upgrade your package dependencies to the latest versions
+# consider running `flutter pub upgrade --major-versions`. Alternatively,
+# dependencies can be manually updated by changing the version numbers below to
+# the latest version available on pub.dev. To see which dependencies have newer
+# versions available, run `flutter pub outdated`.
+dependencies:
+  flutter:
+    sdk: flutter
+
+  paperless_document_scanner:
+    # When depending on this package from a real application you should use:
+    #   paperless_document_scanner: ^x.y.z
+    # See https://dart.dev/tools/pub/dependencies#version-constraints
+    # The example app is bundled with the plugin so we use a path dependency on
+    # the parent directory to use the current plugin's version.
+    path: ../
+
+  # The following adds the Cupertino Icons font to your application.
+  # Use with the CupertinoIcons class for iOS style icons.
+  cupertino_icons: ^1.0.2
+  path_provider: ^2.0.12
+  camera: ^0.10.3
+  image: ^4.0.15
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+
+  # The "flutter_lints" package below contains a set of recommended lints to
+  # encourage good coding practices. The lint set provided by the package is
+  # activated in the `analysis_options.yaml` file located at the root of your
+  # package. See that file for information about deactivating specific lint
+  # rules and activating additional ones.
+  flutter_lints: ^2.0.0
+
+# For information on the generic Dart part of this file, see the
+# following page: https://dart.dev/tools/pub/pubspec
+
+# The following section is specific to Flutter packages.
+flutter:
+
+  # The following line ensures that the Material Icons font is
+  # included with your application, so that you can use the icons in
+  # the material Icons class.
+  uses-material-design: true
+
+  # To add assets to your application, add an assets section, like this:
+  # assets:
+  #   - images/a_dot_burr.jpeg
+  #   - images/a_dot_ham.jpeg
+
+  # An image asset can refer to one or more resolution-specific "variants", see
+  # https://flutter.dev/assets-and-images/#resolution-aware
+
+  # For details regarding adding assets from package dependencies, see
+  # https://flutter.dev/assets-and-images/#from-packages
+
+  # To add custom fonts to your application, add a fonts section here,
+  # in this "flutter" section. Each entry in this list should have a
+  # "family" key with the font family name, and a "fonts" key with a
+  # list giving the asset and other descriptors for the font. For
+  # example:
+  # fonts:
+  #   - family: Schyler
+  #     fonts:
+  #       - asset: fonts/Schyler-Regular.ttf
+  #       - asset: fonts/Schyler-Italic.ttf
+  #         style: italic
+  #   - family: Trajan Pro
+  #     fonts:
+  #       - asset: fonts/TrajanPro.ttf
+  #       - asset: fonts/TrajanPro_Bold.ttf
+  #         weight: 700
+  #
+  # For details regarding fonts from package dependencies,
+  # see https://flutter.dev/custom-fonts/#from-packages
--- a/packages/paperless_document_scanner/ios/.gitignore
+++ b/packages/paperless_document_scanner/ios/.gitignore
@@ -0,0 +1,38 @@
+.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
+/Flutter/ephemeral/
+/Flutter/flutter_export_environment.sh
--- a/packages/paperless_document_scanner/ios/Assets/.gitkeep
+++ b/packages/paperless_document_scanner/ios/Assets/.gitkeep
--- a/packages/paperless_document_scanner/ios/Classes/PaperlessDocumentScannerPlugin.h
+++ b/packages/paperless_document_scanner/ios/Classes/PaperlessDocumentScannerPlugin.h
@@ -0,0 +1,4 @@
+#import <Flutter/Flutter.h>
+
+@interface PaperlessDocumentScannerPlugin : NSObject<FlutterPlugin>
+@end
--- a/packages/paperless_document_scanner/ios/Classes/PaperlessDocumentScannerPlugin.m
+++ b/packages/paperless_document_scanner/ios/Classes/PaperlessDocumentScannerPlugin.m
@@ -0,0 +1,15 @@
+#import "SimpleEdgeDetectionPlugin.h"
+#if __has_include(<paperless_document_scanner/paperless_document_scanner-Swift.h>)
+#import <paperless_document_scanner/paperless_document_scanner-Swift.h>
+#else
+// Support project import fallback if the generated compatibility header
+// is not copied when this plugin is created as a library.
+// https://forums.swift.org/t/swift-static-libraries-dont-copy-generated-objective-c-header/19816
+#import "paperless_document_scanner-Swift.h"
+#endif
+
+@implementation SimpleEdgeDetectionPlugin
+ (void)registerWithRegistrar:(NSObject<FlutterPluginRegistrar>*)registrar {
+  [SwiftSimpleEdgeDetectionPlugin registerWithRegistrar:registrar];
+}
+@end
--- a/packages/paperless_document_scanner/ios/Classes/PaperlessDocumentScannerPlugin.swift
+++ b/packages/paperless_document_scanner/ios/Classes/PaperlessDocumentScannerPlugin.swift
@@ -0,0 +1,14 @@
+import Flutter
+import UIKit
+
+public class PaperlessDocumentScannerPlugin: NSObject, FlutterPlugin {
+  public static func register(with registrar: FlutterPluginRegistrar) {
+    let channel = FlutterMethodChannel(name: "paperless_document_scanner", binaryMessenger: registrar.messenger())
+    let instance = PaperlessDocumentScannerPlugin()
+    registrar.addMethodCallDelegate(instance, channel: channel)
+  }
+
+  public func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
+    result("iOS " + UIDevice.current.systemVersion)
+  }
+}
--- a/packages/paperless_document_scanner/ios/Classes/conversion_utils.cpp
+++ b/packages/paperless_document_scanner/ios/Classes/conversion_utils.cpp
@@ -0,0 +1,15 @@
+#include "conversion_utils.hpp"
+using namespace cv;
+uint8_t * ConversionUtils::matrix_to_bytearray(Mat mat)
+{
+    int size = mat.total() * mat.elemSize();
+    uint8_t *bytes = (uint8_t *)malloc(size);
+    std::memcpy(bytes, mat.data, size * sizeof(uint8_t));
+    return bytes;
+}
+
+Mat ConversionUtils::bytearray_to_matrix(uint8_t *bytes, int byteCount)
+{
+    std::vector<uint8_t> buf(bytes, bytes + byteCount);
+    return imdecode(buf, IMREAD_COLOR);
+}
--- a/packages/paperless_document_scanner/ios/Classes/conversion_utils.hpp
+++ b/packages/paperless_document_scanner/ios/Classes/conversion_utils.hpp
@@ -0,0 +1,10 @@
+#include <opencv2/opencv.hpp>
+
+using namespace cv;
+using namespace std;
+
+class ConversionUtils {
+    public:
+    static uint8_t *matrix_to_bytearray(Mat mat);
+    static Mat bytearray_to_matrix(uint8_t *bytes, int byteCount);
+};
--- a/packages/paperless_document_scanner/ios/Classes/edge_detector.cpp
+++ b/packages/paperless_document_scanner/ios/Classes/edge_detector.cpp
@@ -0,0 +1,163 @@
+#include "edge_detector.hpp"
+
+#include <opencv2/opencv.hpp>
+#include <opencv2/imgproc/types_c.h>
+
+using namespace cv;
+using namespace std;
+
+// helper function:
+// finds a cosine of angle between vectors
+// from pt0->pt1 and from pt0->pt2
+double EdgeDetector::get_cosine_angle_between_vectors(cv::Point pt1, cv::Point pt2, cv::Point pt0)
+{
+    double dx1 = pt1.x - pt0.x;
+    double dy1 = pt1.y - pt0.y;
+    double dx2 = pt2.x - pt0.x;
+    double dy2 = pt2.y - pt0.y;
+    return (dx1*dx2 + dy1*dy2)/sqrt((dx1*dx1 + dy1*dy1)*(dx2*dx2 + dy2*dy2) + 1e-10);
+}
+
+vector<cv::Point> image_to_vector(Mat& image)
+{
+    int imageWidth = image.size().width;
+    int imageHeight = image.size().height;
+
+    return {
+        cv::Point(0, 0),
+        cv::Point(imageWidth, 0),
+        cv::Point(0, imageHeight),
+        cv::Point(imageWidth, imageHeight)
+    };
+}
+
+vector<cv::Point> EdgeDetector::detect_edges(Mat& image)
+{
+    vector<vector<cv::Point>> squares = find_squares(image);
+    vector<cv::Point>* biggestSquare = NULL;
+
+    // Sort so that the points are ordered clockwise
+
+    struct sortY {
+        bool operator() (cv::Point pt1, cv::Point pt2) { return (pt1.y < pt2.y);}
+    } orderRectangleY;
+    struct sortX {
+        bool operator() (cv::Point pt1, cv::Point pt2) { return (pt1.x < pt2.x);}
+    } orderRectangleX;
+
+    for (int i = 0; i < squares.size(); i++) {
+        vector<cv::Point>* currentSquare = &squares[i];
+
+        std::sort(currentSquare->begin(),currentSquare->end(), orderRectangleY);
+        std::sort(currentSquare->begin(),currentSquare->begin()+2, orderRectangleX);
+        std::sort(currentSquare->begin()+2,currentSquare->end(), orderRectangleX);
+
+        float currentSquareWidth = get_width(*currentSquare);
+        float currentSquareHeight = get_height(*currentSquare);
+
+        if (currentSquareWidth < image.size().width / 5 || currentSquareHeight < image.size().height / 5) {
+            continue;
+        }
+
+        if (currentSquareWidth > image.size().width * 0.99 || currentSquareHeight > image.size().height * 0.99) {
+            continue;
+        }
+
+        if (biggestSquare == NULL) {
+            biggestSquare = currentSquare;
+            continue;
+        }
+
+        float biggestSquareWidth = get_width(*biggestSquare);
+        float biggestSquareHeight = get_height(*biggestSquare);
+
+        if (currentSquareWidth * currentSquareHeight >= biggestSquareWidth * biggestSquareHeight) {
+            biggestSquare = currentSquare;
+        }
+
+    }
+
+    if (biggestSquare == NULL) {
+        return image_to_vector(image);
+    }
+
+    std::sort(biggestSquare->begin(),biggestSquare->end(), orderRectangleY);
+    std::sort(biggestSquare->begin(),biggestSquare->begin()+2, orderRectangleX);
+    std::sort(biggestSquare->begin()+2,biggestSquare->end(), orderRectangleX);
+
+    return *biggestSquare;
+}
+
+float EdgeDetector::get_height(vector<cv::Point>& square) {
+    float upperLeftToLowerRight = square[3].y - square[0].y;
+    float upperRightToLowerLeft = square[1].y - square[2].y;
+
+    return max(upperLeftToLowerRight, upperRightToLowerLeft);
+}
+
+float EdgeDetector::get_width(vector<cv::Point>& square) {
+    float upperLeftToLowerRight = square[3].x - square[0].x;
+    float upperRightToLowerLeft = square[1].x - square[2].x;
+
+    return max(upperLeftToLowerRight, upperRightToLowerLeft);
+}
+
+cv::Mat EdgeDetector::debug_squares( cv::Mat image )
+{
+    vector<vector<cv::Point> > squares = find_squares(image);
+
+    for (const auto & square : squares) {
+        // draw rotated rect
+        cv::RotatedRect minRect = minAreaRect(cv::Mat(square));
+        cv::Point2f rect_points[4];
+        minRect.points( rect_points );
+        for ( int j = 0; j < 4; j++ ) {
+            cv::line( image, rect_points[j], rect_points[(j+1)%4], cv::Scalar(0,0,255), 1, 8 ); // blue
+        }
+    }
+
+    return image;
+}
+
+vector<vector<cv::Point> > EdgeDetector::find_squares(Mat& image)
+{
+    vector<int> usedThresholdLevel;
+    vector<vector<Point> > squares;
+
+    Mat gray0(image.size(), CV_8U), gray;
+
+    cvtColor(image , gray, COLOR_BGR2GRAY);
+    medianBlur(gray, gray, 3);      // blur will enhance edge detection
+    vector<vector<cv::Point> > contours;
+
+    int thresholdLevels[] = {10, 30, 50, 70};
+    for(int thresholdLevel : thresholdLevels) {
+        Canny(gray, gray0, thresholdLevel, thresholdLevel*3, 3);
+
+        dilate(gray0, gray0, Mat(), Point(-1, -1));
+
+        findContours(gray0, contours, CV_RETR_LIST, CV_CHAIN_APPROX_SIMPLE);
+
+        vector<Point> approx;
+        for (const auto & contour : contours) {
+            approxPolyDP(Mat(contour), approx, arcLength(Mat(contour), true) * 0.02, true);
+
+            if (approx.size() == 4 && fabs(contourArea(Mat(approx))) > 1000 &&
+                isContourConvex(Mat(approx))) {
+                double maxCosine = 0;
+
+                for (int j = 2; j < 5; j++) {
+                    double cosine = fabs(get_cosine_angle_between_vectors(approx[j % 4], approx[j - 2], approx[j - 1]));
+                    maxCosine = MAX(maxCosine, cosine);
+                }
+
+                if (maxCosine < 0.3) {
+                    squares.push_back(approx);
+                    usedThresholdLevel.push_back(thresholdLevel);
+                }
+            }
+        }
+    }
+
+    return squares;
+}
--- a/packages/paperless_document_scanner/ios/Classes/edge_detector.hpp
+++ b/packages/paperless_document_scanner/ios/Classes/edge_detector.hpp
@@ -0,0 +1,17 @@
+#include <opencv2/opencv.hpp>
+
+using namespace cv;
+using namespace std;
+
+
+class EdgeDetector {
+    public:
+    static vector<cv::Point> detect_edges( Mat& image);
+    static Mat debug_squares( Mat image );
+    
+    private:
+    static double get_cosine_angle_between_vectors( cv::Point pt1, cv::Point pt2, cv::Point pt0 );
+    static vector<vector<cv::Point> > find_squares(Mat& image);
+    static float get_width(vector<cv::Point>& square);
+    static float get_height(vector<cv::Point>& square);
+};
--- a/packages/paperless_document_scanner/ios/Classes/image_processor.cpp
+++ b/packages/paperless_document_scanner/ios/Classes/image_processor.cpp
@@ -0,0 +1,51 @@
+#include "image_processor.hpp"
+#include <opencv2/opencv.hpp>
+
+using namespace cv;
+
+Point2f computePoint(int p1, int p2)
+{
+    Point2f pt;
+    pt.x = p1;
+    pt.y = p2;
+    return pt;
+}
+
+Mat ImageProcessor::process_image(Mat img, float x1, float y1, float x2, float y2, float x3, float y3, float x4, float y4)
+{
+    cvtColor(img, img, COLOR_BGR2GRAY);
+    Mat dst = ImageProcessor::crop_and_transform(img, x1, y1, x2, y2, x3, y3, x4, y4);
+    adaptiveThreshold(dst, dst, 255, cv::ADAPTIVE_THRESH_MEAN_C, cv::THRESH_BINARY, 53, 10);
+
+    return dst;
+}
+
+Mat ImageProcessor::crop_and_transform(Mat img, float x1, float y1, float x2, float y2, float x3, float y3, float x4, float y4)
+{
+    float w1 = sqrt(pow(x4 - x3, 2) + pow(x4 - x3, 2));
+    float w2 = sqrt(pow(x2 - x1, 2) + pow(x2 - x1, 2));
+    float h1 = sqrt(pow(y2 - y4, 2) + pow(y2 - y4, 2));
+    float h2 = sqrt(pow(y1 - y3, 2) + pow(y1 - y3, 2));
+
+    float maxWidth = (w1 < w2) ? w1 : w2;
+    float maxHeight = (h1 < h2) ? h1 : h2;
+
+    Mat dst = Mat::zeros(maxHeight, maxWidth, CV_8UC1);
+
+    vector<Point2f> dst_pts;
+    vector<Point2f> img_pts;
+    dst_pts.push_back(Point(0, 0));
+    dst_pts.push_back(Point(maxWidth - 1, 0));
+    dst_pts.push_back(Point(0, maxHeight - 1));
+    dst_pts.push_back(Point(maxWidth - 1, maxHeight - 1));
+
+    img_pts.push_back(computePoint(x1, y1));
+    img_pts.push_back(computePoint(x2, y2));
+    img_pts.push_back(computePoint(x3, y3));
+    img_pts.push_back(computePoint(x4, y4));
+
+    Mat transformation_matrix = getPerspectiveTransform(img_pts, dst_pts);
+    warpPerspective(img, dst, transformation_matrix, dst.size());
+
+    return dst;
+}
--- a/packages/paperless_document_scanner/ios/Classes/image_processor.hpp
+++ b/packages/paperless_document_scanner/ios/Classes/image_processor.hpp
@@ -0,0 +1,13 @@
+#include <opencv2/opencv.hpp>
+
+using namespace cv;
+using namespace std;
+
+
+class ImageProcessor {
+    public:
+    static Mat process_image(Mat img, float x1, float y1, float x2, float y2, float x3, float y3, float x4, float y4);
+
+    private:
+    static Mat crop_and_transform(Mat img, float x1, float y1, float x2, float y2, float x3, float y3, float x4, float y4);
+};
--- a/packages/paperless_document_scanner/ios/Classes/native_edge_detection.cpp
+++ b/packages/paperless_document_scanner/ios/Classes/native_edge_detection.cpp
@@ -0,0 +1,130 @@
+#include "native_edge_detection.hpp"
+#include "edge_detector.hpp"
+#include "image_processor.hpp"
+#include "conversion_utils.hpp"
+#include <stdlib.h>
+#include <opencv2/opencv.hpp>
+
+extern "C" __attribute__((visibility("default"))) __attribute__((used)) struct Coordinate *create_coordinate(double x, double y)
+{
+    struct Coordinate *coordinate = (struct Coordinate *)malloc(sizeof(struct Coordinate));
+    coordinate->x = x;
+    coordinate->y = y;
+    return coordinate;
+}
+
+extern "C" __attribute__((visibility("default"))) __attribute__((used)) struct DetectionResult *create_detection_result(
+    Coordinate *topLeft,
+    Coordinate *topRight,
+    Coordinate *bottomLeft,
+    Coordinate *bottomRight)
+{
+    struct DetectionResult *detectionResult = (struct DetectionResult *)malloc(sizeof(struct DetectionResult));
+    detectionResult->topLeft = topLeft;
+    detectionResult->topRight = topRight;
+    detectionResult->bottomLeft = bottomLeft;
+    detectionResult->bottomRight = bottomRight;
+    return detectionResult;
+}
+
+extern "C" __attribute__((visibility("default"))) __attribute__((used)) struct DetectionResult *detect_edges_from_file(char *str)
+{
+    struct DetectionResult *coordinate = (struct DetectionResult *)malloc(sizeof(struct DetectionResult));
+    cv::Mat mat = cv::imread(str);
+
+    if (mat.size().width == 0 || mat.size().height == 0)
+    {
+        return create_detection_result(
+            create_coordinate(0, 0),
+            create_coordinate(1, 0),
+            create_coordinate(0, 1),
+            create_coordinate(1, 1));
+    }
+
+    vector<cv::Point> points = EdgeDetector::detect_edges(mat);
+
+    return create_detection_result(
+        create_coordinate((double)points[0].x / mat.size().width, (double)points[0].y / mat.size().height),
+        create_coordinate((double)points[1].x / mat.size().width, (double)points[1].y / mat.size().height),
+        create_coordinate((double)points[2].x / mat.size().width, (double)points[2].y / mat.size().height),
+        create_coordinate((double)points[3].x / mat.size().width, (double)points[3].y / mat.size().height));
+}
+
+extern "C" __attribute__((visibility("default"))) __attribute__((used)) struct DetectionResult *detect_edges(uint8_t *bytes, int byteCount)
+{
+    struct DetectionResult *coordinate = (struct DetectionResult *)malloc(sizeof(struct DetectionResult));
+    Mat mat = ConversionUtils::bytearray_to_matrix(bytes, byteCount);
+
+    if (mat.size().width == 0 || mat.size().height == 0)
+    {
+        return create_detection_result(
+            create_coordinate(0, 0),
+            create_coordinate(1, 0),
+            create_coordinate(0, 1),
+            create_coordinate(1, 1));
+    }
+
+    vector<cv::Point> points = EdgeDetector::detect_edges(mat);
+
+    return create_detection_result(
+        create_coordinate((double)points[0].x / mat.size().width, (double)points[0].y / mat.size().height),
+        create_coordinate((double)points[1].x / mat.size().width, (double)points[1].y / mat.size().height),
+        create_coordinate((double)points[2].x / mat.size().width, (double)points[2].y / mat.size().height),
+        create_coordinate((double)points[3].x / mat.size().width, (double)points[3].y / mat.size().height));
+}
+
+extern "C" __attribute__((visibility("default"))) __attribute__((used)) bool process_image_from_file(
+    char *path,
+    double topLeftX,
+    double topLeftY,
+    double topRightX,
+    double topRightY,
+    double bottomLeftX,
+    double bottomLeftY,
+    double bottomRightX,
+    double bottomRightY)
+{
+    cv::Mat mat = cv::imread(path);
+
+    cv::Mat resizedMat = ImageProcessor::process_image(
+        mat,
+        topLeftX * mat.size().width,
+        topLeftY * mat.size().height,
+        topRightX * mat.size().width,
+        topRightY * mat.size().height,
+        bottomLeftX * mat.size().width,
+        bottomLeftY * mat.size().height,
+        bottomRightX * mat.size().width,
+        bottomRightY * mat.size().height);
+
+    return cv::imwrite(path, resizedMat);
+}
+
+extern "C" __attribute__((visibility("default"))) __attribute__((used))
+uint8_t *
+process_image(
+    uint8_t *bytes,
+    int byteCount,
+    double topLeftX,
+    double topLeftY,
+    double topRightX,
+    double topRightY,
+    double bottomLeftX,
+    double bottomLeftY,
+    double bottomRightX,
+    double bottomRightY)
+{
+    cv::Mat mat = ConversionUtils::bytearray_to_matrix(bytes, byteCount);
+    cv::Mat resizedMat = ImageProcessor::process_image(
+        mat,
+        topLeftX * mat.size().width,
+        topLeftY * mat.size().height,
+        topRightX * mat.size().width,
+        topRightY * mat.size().height,
+        bottomLeftX * mat.size().width,
+        bottomLeftY * mat.size().height,
+        bottomRightX * mat.size().width,
+        bottomRightY * mat.size().height);
+
+    return ConversionUtils::matrix_to_bytearray(resizedMat);
+}
--- a/packages/paperless_document_scanner/ios/Classes/native_edge_detection.hpp
+++ b/packages/paperless_document_scanner/ios/Classes/native_edge_detection.hpp
@@ -0,0 +1,47 @@
+#include <iostream>
+struct Coordinate
+{
+    double x;
+    double y;
+};
+
+struct DetectionResult
+{
+    Coordinate *topLeft;
+    Coordinate *topRight;
+    Coordinate *bottomLeft;
+    Coordinate *bottomRight;
+};
+
+extern "C" struct ProcessingInput
+{
+    char *path;
+    DetectionResult detectionResult;
+};
+
+extern "C" struct DetectionResult *detect_edges_from_file(char *str);
+
+extern "C" struct DetectionResult *detect_edges(uint8_t *bytes, int byteCount);
+
+extern "C" uint8_t *process_image(
+    uint8_t *bytes,
+    int byteCount,
+    double topLeftX,
+    double topLeftY,
+    double topRightX,
+    double topRightY,
+    double bottomLeftX,
+    double bottomLeftY,
+    double bottomRightX,
+    double bottomRightY);
+
+extern "C" bool process_image_from_file(
+    char *path,
+    double topLeftX,
+    double topLeftY,
+    double topRightX,
+    double topRightY,
+    double bottomLeftX,
+    double bottomLeftY,
+    double bottomRightX,
+    double bottomRightY);
--- a/packages/paperless_document_scanner/ios/paperless_document_scanner.podspec
+++ b/packages/paperless_document_scanner/ios/paperless_document_scanner.podspec
@@ -0,0 +1,29 @@
+#
+# To learn more about a Podspec see http://guides.cocoapods.org/syntax/podspec.html.
+# Run `pod lib lint paperless_document_scanner.podspec` to validate before publishing.
+#
+Pod::Spec.new do |s|
+  s.name             = 'paperless_document_scanner'
+  s.version          = '0.0.1'
+  s.summary          = 'A new Flutter plugin project.'
+  s.description      = <<-DESC
+A new Flutter plugin project.
+                       DESC
+  s.homepage         = 'http://example.com'
+  s.license          = { :file => '../LICENSE' }
+  s.author           = { 'Your Company' => 'email@example.com' }
+  s.source           = { :path => '.' }
+  s.source_files = 'Classes/**/*.{swift,c,m,h,mm,cpp,plist}'
+  s.dependency 'Flutter'
+  s.platform = :ios, '9.0'
+
+  # Flutter.framework does not contain a i386 slice.
+  s.pod_target_xcconfig = { 'DEFINES_MODULE' => 'YES', 'EXCLUDED_ARCHS[sdk=iphonesimulator*]' => 'i386' }
+  s.swift_version = '5.0'
+
+  s.preserve_paths = 'opencv2.framework'
+  s.xcconfig = { 'OTHER_LDFLAGS' => '-framework opencv2' }
+  s.vendored_frameworks = 'opencv2.framework'
+  s.frameworks = 'AVFoundation'
+  s.library = 'c++'
+end
--- a/Show More
+++ b/Show More
				`@@ -0,0 +1 @@`
				`rootProject.name = 'paperless_document_scanner'`