Refactor: extract image processor

app/android/app/build.gradle

@@ -121,6 +121,6 @@ dependencies {
     // fix crash on sdk33, need investigation
     implementation "androidx.window:window:1.0.0"
     implementation 'com.google.android.gms:play-services-maps:18.1.0'
-    implementation 'com.nkming.nc_photos.np_android_log:np_android_log'
+    implementation 'com.nkming.nc_photos.np_android_core:np_android_core'
     coreLibraryDesugaring "com.android.tools:desugar_jdk_libs:2.0.3"
 }

app/android/app/src/main/kotlin/com/nkming/nc_photos/App.kt

@@ -1,6 +1,6 @@
 package com.nkming.nc_photos
 
-import com.nkming.nc_photos.np_android_log.LogConfig
+import com.nkming.nc_photos.np_android_core.LogConfig
 import io.flutter.BuildConfig
 import io.flutter.app.FlutterApplication
 

app/android/app/src/main/kotlin/com/nkming/nc_photos/CustomHostnameVerifier.kt

@@ -1,7 +1,7 @@
 package com.nkming.nc_photos
 
 import android.content.Context
-import com.nkming.nc_photos.np_android_log.logI
+import com.nkming.nc_photos.np_android_core.logI
 import java.util.Locale
 import javax.net.ssl.HostnameVerifier
 import javax.net.ssl.HttpsURLConnection
@@ -13,9 +13,7 @@ class CustomHostnameVerifier(context: Context) : HostnameVerifier {
      * behavior
      */
     override fun verify(hostname: String, session: SSLSession): Boolean {
-		return if (allowedHosts.contains(
-				hostname.lowercase(Locale.getDefault())
-			)) {
+        return if (allowedHosts.contains(hostname.lowercase(Locale.getDefault()))) {
             // good
             logI(
                 "CustomHostnameVerifier::verify",

app/android/app/src/main/kotlin/com/nkming/nc_photos/CustomKeyStoresTrustManager.kt

@@ -13,8 +13,9 @@ class CustomKeyStoresTrustManager(keyStore: KeyStore) : X509TrustManager {
      * Delegate to the default trust manager.
      */
     @Throws(CertificateException::class)
-	override fun checkClientTrusted(chain: Array<X509Certificate>,
-			authType: String) {
+    override fun checkClientTrusted(
+        chain: Array<X509Certificate>, authType: String
+    ) {
         val defaultX509TrustManager = x509TrustManagers[0]
         defaultX509TrustManager.checkClientTrusted(chain, authType)
     }
@@ -23,8 +24,9 @@ class CustomKeyStoresTrustManager(keyStore: KeyStore) : X509TrustManager {
      * Loop over the trustmanagers until we find one that accepts our server
      */
     @Throws(CertificateException::class)
-	override fun checkServerTrusted(chain: Array<X509Certificate>,
-			authType: String) {
+    override fun checkServerTrusted(
+        chain: Array<X509Certificate>, authType: String
+    ) {
         var defaultException: Exception? = null
         for (tm in x509TrustManagers) {
             try {
@@ -54,13 +56,15 @@ class CustomKeyStoresTrustManager(keyStore: KeyStore) : X509TrustManager {
         val factories = ArrayList<TrustManagerFactory>()
         // The default Trustmanager with default keystore
         val original = TrustManagerFactory.getInstance(
-				TrustManagerFactory.getDefaultAlgorithm())
+            TrustManagerFactory.getDefaultAlgorithm()
+        )
         original.init(null as KeyStore?)
         factories.add(original)
 
         // with custom keystore
         val custom = TrustManagerFactory.getInstance(
-				TrustManagerFactory.getDefaultAlgorithm())
+            TrustManagerFactory.getDefaultAlgorithm()
+        )
         custom.init(keyStore)
         factories.add(custom)
 

app/android/app/src/main/kotlin/com/nkming/nc_photos/CustomSSLSocketFactory.kt

@@ -29,10 +29,12 @@ class CustomSSLSocketFactory(context: Context) : SSLSocketFactory() {
     }
 
     @Throws(IOException::class)
-	override fun createSocket(s: Socket, host: String, port: Int,
-			autoClose: Boolean): Socket {
+    override fun createSocket(
+        s: Socket, host: String, port: Int, autoClose: Boolean
+    ): Socket {
         return enableProtocols(
-				sslSocketFactory.createSocket(s, host, port, autoClose))
+            sslSocketFactory.createSocket(s, host, port, autoClose)
+        )
     }
 
     @Throws(IOException::class)
@@ -41,10 +43,12 @@ class CustomSSLSocketFactory(context: Context) : SSLSocketFactory() {
     }
 
     @Throws(IOException::class)
-	override fun createSocket(host: String, port: Int, localHost: InetAddress,
-			localPort: Int): Socket {
+    override fun createSocket(
+        host: String, port: Int, localHost: InetAddress, localPort: Int
+    ): Socket {
         return enableProtocols(
-				sslSocketFactory.createSocket(host, port, localHost, localPort))
+            sslSocketFactory.createSocket(host, port, localHost, localPort)
+        )
     }
 
     @Throws(IOException::class)
@@ -53,11 +57,17 @@ class CustomSSLSocketFactory(context: Context) : SSLSocketFactory() {
     }
 
     @Throws(IOException::class)
-	override fun createSocket(address: InetAddress, port: Int,
-			localAddress: InetAddress, localPort: Int): Socket {
+    override fun createSocket(
+        address: InetAddress,
+        port: Int,
+        localAddress: InetAddress,
+        localPort: Int
+    ): Socket {
         return enableProtocols(
-				sslSocketFactory.createSocket(address, port, localAddress,
-						localPort))
+            sslSocketFactory.createSocket(
+                address, port, localAddress, localPort
+            )
+        )
     }
 
     fun reload(context: Context) {

app/android/app/src/main/kotlin/com/nkming/nc_photos/K.kt

@@ -1,6 +0,0 @@
-package com.nkming.nc_photos
-
-interface K {
-	companion object {
-	}
-}

app/android/app/src/main/kotlin/com/nkming/nc_photos/MainActivity.kt

@@ -6,11 +6,11 @@ import android.os.Bundle
 import androidx.annotation.NonNull
 import com.google.android.gms.maps.MapsInitializer
 import com.google.android.gms.maps.OnMapsSdkInitializedCallback
-import com.nkming.nc_photos.np_android_log.logD
-import com.nkming.nc_photos.np_android_log.logE
-import com.nkming.nc_photos.np_android_log.logI
-import com.nkming.nc_photos.plugin.NcPhotosPlugin
-import com.nkming.nc_photos.plugin.UriUtil
+import com.nkming.nc_photos.np_android_core.UriUtil
+import com.nkming.nc_photos.np_android_core.logD
+import com.nkming.nc_photos.np_android_core.logE
+import com.nkming.nc_photos.np_android_core.logI
+import com.nkming.nc_photos.np_platform_image_processor.NpPlatformImageProcessorPlugin
 import io.flutter.embedding.android.FlutterActivity
 import io.flutter.embedding.engine.FlutterEngine
 import io.flutter.plugin.common.EventChannel
@@ -28,7 +28,7 @@ class MainActivity : FlutterActivity(), MethodChannel.MethodCallHandler,
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-		if (intent.action == NcPhotosPlugin.ACTION_SHOW_IMAGE_PROCESSOR_RESULT) {
+        if (intent.action == NpPlatformImageProcessorPlugin.ACTION_SHOW_IMAGE_PROCESSOR_RESULT) {
             val route = getRouteFromImageProcessorResult(intent) ?: return
             logI(TAG, "Initial route: $route")
             _initialRoute = route
@@ -66,7 +66,7 @@ class MainActivity : FlutterActivity(), MethodChannel.MethodCallHandler,
 
     override fun onNewIntent(intent: Intent) {
         when (intent.action) {
-			NcPhotosPlugin.ACTION_SHOW_IMAGE_PROCESSOR_RESULT -> {
+            NpPlatformImageProcessorPlugin.ACTION_SHOW_IMAGE_PROCESSOR_RESULT -> {
                 val route = getRouteFromImageProcessorResult(intent) ?: return
                 logI(TAG, "Navigate to route: $route")
                 flutterEngine?.navigationChannel?.pushRoute(route)
@@ -109,7 +109,7 @@ class MainActivity : FlutterActivity(), MethodChannel.MethodCallHandler,
 
     private fun getRouteFromImageProcessorResult(intent: Intent): String? {
         val resultUri = intent.getParcelableExtra<Uri>(
-			NcPhotosPlugin.EXTRA_IMAGE_RESULT_URI
+            NpPlatformImageProcessorPlugin.EXTRA_IMAGE_RESULT_URI
         )
         if (resultUri == null) {
             logE(TAG, "Image result uri == null")

app/android/app/src/main/kotlin/com/nkming/nc_photos/SelfSignedCertChannelHandler.kt

@@ -1,7 +1,7 @@
 package com.nkming.nc_photos
 
 import android.app.Activity
-import com.nkming.nc_photos.np_android_log.logE
+import com.nkming.nc_photos.np_android_core.logE
 import io.flutter.plugin.common.MethodCall
 import io.flutter.plugin.common.MethodChannel
 import javax.net.ssl.HttpsURLConnection

app/android/app/src/main/kotlin/com/nkming/nc_photos/SelfSignedCertManager.kt

@@ -2,8 +2,8 @@ package com.nkming.nc_photos
 
 import android.content.Context
 import android.util.Pair
-import com.nkming.nc_photos.np_android_log.logE
-import com.nkming.nc_photos.np_android_log.logI
+import com.nkming.nc_photos.np_android_core.logE
+import com.nkming.nc_photos.np_android_core.logI
 import org.json.JSONObject
 import java.io.File
 import java.io.FileInputStream
@@ -13,15 +13,20 @@ import java.time.OffsetDateTime
 
 // Modifications to this class must also reflect on dart side
 data class CertInfo(
-	val host: String, val sha1: String, val subject: String,
-	val issuer: String, val startValidity: OffsetDateTime,
+    val host: String,
+    val sha1: String,
+    val subject: String,
+    val issuer: String,
+    val startValidity: OffsetDateTime,
     val endValidity: OffsetDateTime
 ) {
     companion object {
         fun fromJson(json: JSONObject): CertInfo {
             return CertInfo(
-				json.getString("host"), json.getString("sha1"),
-				json.getString("subject"), json.getString("issuer"),
+                json.getString("host"),
+                json.getString("sha1"),
+                json.getString("subject"),
+                json.getString("issuer"),
                 OffsetDateTime.parse(json.getString("startValidity")),
                 OffsetDateTime.parse(json.getString("endValidity"))
             )
@@ -58,7 +63,8 @@ class SelfSignedCertManager {
             } catch (e: Exception) {
                 logE(
                     "SelfSignedCertManager::readAllCerts",
-					"Failed to read certificate file: ${f.name}", e
+                    "Failed to read certificate file: ${f.name}",
+                    e
                 )
             }
         }

app/android/app/src/main/kotlin/com/nkming/nc_photos/ShareChannelHandler.kt

@@ -19,7 +19,8 @@ class ShareChannelHandler(activity: Activity) :
                 try {
                     shareItems(
                         call.argument("fileUris")!!,
-						call.argument("mimeTypes")!!, result
+                        call.argument("mimeTypes")!!,
+                        result
                     )
                 } catch (e: Throwable) {
                     result.error("systemException", e.toString(), null)
@@ -29,7 +30,8 @@ class ShareChannelHandler(activity: Activity) :
             "shareText" -> {
                 try {
                     shareText(
-						call.argument("text")!!, call.argument("mimeType"),
+                        call.argument("text")!!,
+                        call.argument("mimeType"),
                         result
                     )
                 } catch (e: Throwable) {
@@ -40,7 +42,8 @@ class ShareChannelHandler(activity: Activity) :
             "shareAsAttachData" -> {
                 try {
                     shareAsAttachData(
-						call.argument("fileUri")!!, call.argument("mimeType"),
+                        call.argument("fileUri")!!,
+                        call.argument("mimeType"),
                         result
                     )
                 } catch (e: Throwable) {
@@ -55,7 +58,8 @@ class ShareChannelHandler(activity: Activity) :
     }
 
     private fun shareItems(
-		fileUris: List<String>, mimeTypes: List<String?>,
+        fileUris: List<String>,
+        mimeTypes: List<String?>,
         result: MethodChannel.Result
     ) {
         assert(fileUris.isNotEmpty())

app/android/settings.gradle

@@ -1,5 +1,5 @@
 include ':app'
-includeBuild '../../np_android_log'
+includeBuild '../../np_android_core'
 
 def localPropertiesFile = new File(rootProject.projectDir, "local.properties")
 def properties = new Properties()

app/lib/mobile/android/permission_util.dart

@@ -1,6 +1,6 @@
 import 'package:logging/logging.dart';
 import 'package:nc_photos/stream_extension.dart';
-import 'package:nc_photos_plugin/nc_photos_plugin.dart';
+import 'package:np_platform_permission/np_platform_permission.dart';
 
 Future<Map<String, int>> requestPermissionsForResult(
     List<String> permissions) async {

app/lib/widget/enhanced_photo_browser.dart

@@ -27,6 +27,7 @@ import 'package:nc_photos_plugin/nc_photos_plugin.dart';
 import 'package:np_async/np_async.dart';
 import 'package:np_codegen/np_codegen.dart';
 import 'package:np_collection/np_collection.dart';
+import 'package:np_platform_permission/np_platform_permission.dart';
 import 'package:np_platform_util/np_platform_util.dart';
 
 part 'enhanced_photo_browser.g.dart';

app/lib/widget/handler/permission_handler.dart

@@ -4,7 +4,7 @@ import 'package:nc_photos/k.dart' as k;
 import 'package:nc_photos/mobile/android/android_info.dart';
 import 'package:nc_photos/mobile/android/permission_util.dart';
 import 'package:nc_photos/snack_bar_manager.dart';
-import 'package:nc_photos_plugin/nc_photos_plugin.dart';
+import 'package:np_platform_permission/np_platform_permission.dart';
 import 'package:np_platform_util/np_platform_util.dart';
 
 /// Handle platform permissions

app/lib/widget/image_editor.dart

@@ -23,7 +23,8 @@ import 'package:nc_photos/widget/image_editor/color_toolbar.dart';
 import 'package:nc_photos/widget/image_editor/crop_controller.dart';
 import 'package:nc_photos/widget/image_editor/transform_toolbar.dart';
 import 'package:nc_photos/widget/image_editor_persist_option_dialog.dart';
-import 'package:nc_photos_plugin/nc_photos_plugin.dart';
+import 'package:np_platform_image_processor/np_platform_image_processor.dart';
+import 'package:np_platform_raw_image/np_platform_raw_image.dart';
 import 'package:np_ui/np_ui.dart';
 
 class ImageEditorArguments {

app/lib/widget/image_editor/color_toolbar.dart

@@ -2,8 +2,8 @@ import 'package:flutter/material.dart';
 import 'package:nc_photos/app_localizations.dart';
 import 'package:nc_photos/object_extension.dart';
 import 'package:nc_photos/widget/image_editor/toolbar_button.dart';
-import 'package:nc_photos_plugin/nc_photos_plugin.dart';
 import 'package:np_collection/np_collection.dart';
+import 'package:np_platform_image_processor/np_platform_image_processor.dart';
 import 'package:np_string/np_string.dart';
 import 'package:np_ui/np_ui.dart';
 

app/lib/widget/image_editor/crop_controller.dart

@@ -4,8 +4,9 @@ import 'package:flutter/material.dart';
 import 'package:logging/logging.dart';
 import 'package:nc_photos/pixel_image_provider.dart';
 import 'package:nc_photos/widget/image_editor/transform_toolbar.dart';
-import 'package:nc_photos_plugin/nc_photos_plugin.dart';
 import 'package:np_codegen/np_codegen.dart';
+import 'package:np_platform_image_processor/np_platform_image_processor.dart';
+import 'package:np_platform_raw_image/np_platform_raw_image.dart';
 
 part 'crop_controller.g.dart';
 

app/lib/widget/image_editor/transform_toolbar.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:nc_photos/app_localizations.dart';
 import 'package:nc_photos/widget/image_editor/toolbar_button.dart';
-import 'package:nc_photos_plugin/nc_photos_plugin.dart';
+import 'package:np_platform_image_processor/np_platform_image_processor.dart';
 
 enum TransformToolType {
   crop,

app/lib/widget/image_enhancer.dart

@@ -28,8 +28,8 @@ import 'package:nc_photos/widget/handler/permission_handler.dart';
 import 'package:nc_photos/widget/image_editor_persist_option_dialog.dart';
 import 'package:nc_photos/widget/selectable.dart';
 import 'package:nc_photos/widget/settings/enhancement_settings.dart';
-import 'package:nc_photos_plugin/nc_photos_plugin.dart';
 import 'package:np_codegen/np_codegen.dart';
+import 'package:np_platform_image_processor/np_platform_image_processor.dart';
 import 'package:np_platform_util/np_platform_util.dart';
 import 'package:np_ui/np_ui.dart';
 

app/lib/widget/settings/developer_settings.dart

@@ -17,7 +17,6 @@ import 'package:nc_photos/mobile/self_signed_cert_manager.dart';
 import 'package:nc_photos/snack_bar_manager.dart';
 import 'package:nc_photos/widget/page_visibility_mixin.dart';
 import 'package:np_codegen/np_codegen.dart';
-import 'package:np_platform_lock/np_platform_lock.dart';
 import 'package:np_platform_util/np_platform_util.dart';
 import 'package:to_string/to_string.dart';
 

app/pubspec.lock

@@ -1011,6 +1011,13 @@ packages:
       relative: true
     source: path
     version: "1.0.0"
+  np_platform_image_processor:
+    dependency: "direct main"
+    description:
+      path: "../np_platform_image_processor"
+      relative: true
+    source: path
+    version: "0.0.1"
   np_platform_lock:
     dependency: "direct main"
     description:
@@ -1018,6 +1025,20 @@ packages:
       relative: true
     source: path
     version: "0.0.1"
+  np_platform_permission:
+    dependency: "direct main"
+    description:
+      path: "../np_platform_permission"
+      relative: true
+    source: path
+    version: "0.0.1"
+  np_platform_raw_image:
+    dependency: "direct main"
+    description:
+      path: "../np_platform_raw_image"
+      relative: true
+    source: path
+    version: "0.0.1"
   np_platform_util:
     dependency: "direct main"
     description:

app/pubspec.yaml

@@ -109,8 +109,14 @@ dependencies:
     path: ../np_log
   np_math:
     path: ../np_math
+  np_platform_image_processor:
+    path: ../np_platform_image_processor
   np_platform_lock:
     path: ../np_platform_lock
+  np_platform_permission:
+    path: ../np_platform_permission
+  np_platform_raw_image:
+    path: ../np_platform_raw_image
   np_platform_util:
     path: ../np_platform_util
   np_string:

np_android_core/build.gradle

@@ -1,4 +1,4 @@
-group 'com.nkming.nc_photos.np_android_log'
+group 'com.nkming.nc_photos.np_android_core'
 version '1.0-SNAPSHOT'
 
 buildscript {
@@ -26,7 +26,7 @@ apply plugin: 'com.android.library'
 apply plugin: 'kotlin-android'
 
 android {
-    namespace 'com.nkming.nc_photos.np_android_log'
+    namespace 'com.nkming.nc_photos.np_android_core'
    	compileSdk 31
 
     defaultConfig {
@@ -51,4 +51,7 @@ android {
 }
 
 dependencies {
+    implementation "androidx.annotation:annotation:1.6.0"
+    implementation "androidx.core:core-ktx:1.10.1"
+    implementation "androidx.exifinterface:exifinterface:1.3.6"
 }

np_android_core/settings.gradle

@@ -0,0 +1 @@
+rootProject.name = "np_android_core"

np_android_core/src/main/java/com/nkming/nc_photos/np_android_core/BitmapUtil.kt

@@ -0,0 +1,244 @@
+package com.nkming.nc_photos.np_android_core
+
+import android.content.Context
+import android.graphics.Bitmap
+import android.graphics.BitmapFactory
+import android.graphics.Matrix
+import android.net.Uri
+import androidx.exifinterface.media.ExifInterface
+import java.io.InputStream
+import kotlin.contracts.ExperimentalContracts
+import kotlin.contracts.InvocationKind
+import kotlin.contracts.contract
+
+fun Bitmap.aspectRatio() = width / height.toFloat()
+
+/**
+ * Recycle the bitmap after @c block returns.
+ *
+ * @param block
+ * @return
+ */
+@OptIn(ExperimentalContracts::class)
+inline fun <T> Bitmap.use(block: (Bitmap) -> T): T {
+    contract {
+        callsInPlace(block, InvocationKind.EXACTLY_ONCE)
+    }
+    try {
+        return block(this)
+    } finally {
+        recycle()
+    }
+}
+
+enum class BitmapResizeMethod {
+    FIT, FILL,
+}
+
+interface BitmapUtil {
+    companion object {
+        fun loadImageFixed(
+            context: Context, uri: Uri, targetW: Int, targetH: Int
+        ): Bitmap {
+            val opt = loadImageBounds(context, uri)
+            val subsample = calcBitmapSubsample(
+                opt.outWidth,
+                opt.outHeight,
+                targetW,
+                targetH,
+                BitmapResizeMethod.FILL
+            )
+            if (subsample > 1) {
+                logD(
+                    TAG,
+                    "Subsample image to fixed: $subsample ${opt.outWidth}x${opt.outHeight} -> ${targetW}x$targetH"
+                )
+            }
+            val outOpt = BitmapFactory.Options().apply {
+                inSampleSize = subsample
+            }
+            val bitmap = loadImage(context, uri, outOpt)
+            if (subsample > 1) {
+                logD(TAG, "Bitmap subsampled: ${bitmap.width}x${bitmap.height}")
+            }
+            return Bitmap.createScaledBitmap(bitmap, targetW, targetH, true)
+        }
+
+        /**
+         * Load a bitmap
+         *
+         * If @c resizeMethod == FIT, make sure the size of the bitmap can fit
+         * inside the bound defined by @c targetW and @c targetH, i.e.,
+         * bitmap.w <= @c targetW and bitmap.h <= @c targetH
+         *
+         * If @c resizeMethod == FILL, make sure the size of the bitmap can
+         * completely fill the bound defined by @c targetW and @c targetH, i.e.,
+         * bitmap.w >= @c targetW and bitmap.h >= @c targetH
+         *
+         * If bitmap is smaller than the bound and @c shouldUpscale == true, it
+         * will be upscaled
+         *
+         * @param context
+         * @param uri
+         * @param targetW
+         * @param targetH
+         * @param resizeMethod
+         * @param isAllowSwapSide
+         * @param shouldUpscale
+         * @return
+         */
+        fun loadImage(
+            context: Context,
+            uri: Uri,
+            targetW: Int,
+            targetH: Int,
+            resizeMethod: BitmapResizeMethod,
+            isAllowSwapSide: Boolean = false,
+            shouldUpscale: Boolean = true,
+            shouldFixOrientation: Boolean = false,
+        ): Bitmap {
+            val opt = loadImageBounds(context, uri)
+            val shouldSwapSide =
+                isAllowSwapSide && opt.outWidth != opt.outHeight && (opt.outWidth >= opt.outHeight) != (targetW >= targetH)
+            val dstW = if (shouldSwapSide) targetH else targetW
+            val dstH = if (shouldSwapSide) targetW else targetH
+            val subsample = calcBitmapSubsample(
+                opt.outWidth, opt.outHeight, dstW, dstH, resizeMethod
+            )
+            if (subsample > 1) {
+                logD(
+                    TAG,
+                    "Subsample image to ${resizeMethod.name}: $subsample ${opt.outWidth}x${opt.outHeight} -> ${dstW}x$dstH" + (if (shouldSwapSide) " (swapped)" else "")
+                )
+            }
+            val outOpt = BitmapFactory.Options().apply {
+                inSampleSize = subsample
+            }
+            val bitmap = loadImage(context, uri, outOpt)
+            if (subsample > 1) {
+                logD(TAG, "Bitmap subsampled: ${bitmap.width}x${bitmap.height}")
+            }
+            if (bitmap.width < dstW && bitmap.height < dstH && !shouldUpscale) {
+                return if (shouldFixOrientation) {
+                    fixOrientation(context, uri, bitmap)
+                } else {
+                    bitmap
+                }
+            }
+            val result = when (resizeMethod) {
+                BitmapResizeMethod.FIT -> Bitmap.createScaledBitmap(
+                    bitmap,
+                    minOf(dstW, (dstH * bitmap.aspectRatio()).toInt()),
+                    minOf(dstH, (dstW / bitmap.aspectRatio()).toInt()),
+                    true
+                )
+
+                BitmapResizeMethod.FILL -> Bitmap.createScaledBitmap(
+                    bitmap,
+                    maxOf(dstW, (dstH * bitmap.aspectRatio()).toInt()),
+                    maxOf(dstH, (dstW / bitmap.aspectRatio()).toInt()),
+                    true
+                )
+            }
+            return if (shouldFixOrientation) {
+                fixOrientation(context, uri, result)
+            } else {
+                result
+            }
+        }
+
+        /**
+         * Rotate the image to its visible orientation
+         */
+        private fun fixOrientation(
+            context: Context, uri: Uri, bitmap: Bitmap
+        ): Bitmap {
+            return try {
+                openUriInputStream(context, uri)!!.use {
+                    val iExif = ExifInterface(it)
+                    val orientation =
+                        iExif.getAttributeInt(ExifInterface.TAG_ORIENTATION, 1)
+                    logI(
+                        TAG,
+                        "[fixOrientation] Input file orientation: $orientation"
+                    )
+                    val rotate = when (orientation) {
+                        ExifInterface.ORIENTATION_ROTATE_90, ExifInterface.ORIENTATION_TRANSPOSE -> 90f
+
+                        ExifInterface.ORIENTATION_ROTATE_180, ExifInterface.ORIENTATION_FLIP_VERTICAL -> 180f
+
+                        ExifInterface.ORIENTATION_ROTATE_270, ExifInterface.ORIENTATION_TRANSVERSE -> 270f
+
+                        ExifInterface.ORIENTATION_FLIP_HORIZONTAL -> 0f
+                        else -> return bitmap
+                    }
+                    val mat = Matrix()
+                    mat.postRotate(rotate)
+                    if (orientation == ExifInterface.ORIENTATION_FLIP_HORIZONTAL || orientation == ExifInterface.ORIENTATION_TRANSVERSE || orientation == ExifInterface.ORIENTATION_FLIP_VERTICAL || orientation == ExifInterface.ORIENTATION_TRANSPOSE) {
+                        mat.postScale(-1f, 1f)
+                    }
+                    Bitmap.createBitmap(
+                        bitmap, 0, 0, bitmap.width, bitmap.height, mat, true
+                    )
+                }
+            } catch (e: Throwable) {
+                logE(
+                    TAG,
+                    "[fixOrientation] Failed fixing, assume normal orientation",
+                    e
+                )
+                bitmap
+            }
+        }
+
+        private fun openUriInputStream(
+            context: Context, uri: Uri
+        ): InputStream? {
+            return if (UriUtil.isAssetUri(uri)) {
+                context.assets.open(UriUtil.getAssetUriPath(uri))
+            } else {
+                context.contentResolver.openInputStream(uri)
+            }
+        }
+
+        private fun loadImageBounds(
+            context: Context, uri: Uri
+        ): BitmapFactory.Options {
+            openUriInputStream(context, uri)!!.use {
+                val opt = BitmapFactory.Options().apply {
+                    inJustDecodeBounds = true
+                }
+                BitmapFactory.decodeStream(it, null, opt)
+                return opt
+            }
+        }
+
+        private fun loadImage(
+            context: Context, uri: Uri, opt: BitmapFactory.Options
+        ): Bitmap {
+            openUriInputStream(context, uri)!!.use {
+                return BitmapFactory.decodeStream(it, null, opt)!!
+            }
+        }
+
+        private fun calcBitmapSubsample(
+            originalW: Int,
+            originalH: Int,
+            targetW: Int,
+            targetH: Int,
+            resizeMethod: BitmapResizeMethod
+        ): Int {
+            return when (resizeMethod) {
+                BitmapResizeMethod.FIT -> maxOf(
+                    originalW / targetW, originalH / targetH
+                )
+
+                BitmapResizeMethod.FILL -> minOf(
+                    originalW / targetW, originalH / targetH
+                )
+            }
+        }
+
+        private const val TAG = "BitmapUtil"
+    }
+}

np_android_core/src/main/java/com/nkming/nc_photos/np_android_core/Exception.kt

@@ -0,0 +1,3 @@
+package com.nkming.nc_photos.np_android_core
+
+class PermissionException(message: String) : Exception(message)

np_android_core/src/main/java/com/nkming/nc_photos/np_android_core/K.kt

@@ -0,0 +1,7 @@
+package com.nkming.nc_photos.np_android_core
+
+internal interface K {
+    companion object {
+        const val PERMISSION_REQUEST_CODE = 11011
+    }
+}

np_android_core/src/main/java/com/nkming/nc_photos/np_android_core/Log.kt

@@ -1,4 +1,4 @@
-package com.nkming.nc_photos.np_android_log
+package com.nkming.nc_photos.np_android_core
 
 class LogConfig {
 	companion object {

np_android_core/src/main/java/com/nkming/nc_photos/np_android_core/MediaStoreUtil.kt

@@ -1,4 +1,4 @@
-package com.nkming.nc_photos.plugin
+package com.nkming.nc_photos.np_android_core
 
 import android.content.ContentValues
 import android.content.Context

np_android_core/src/main/java/com/nkming/nc_photos/np_android_core/PermissionUtil.kt

@@ -0,0 +1,42 @@
+package com.nkming.nc_photos.np_android_core
+
+import android.Manifest
+import android.app.Activity
+import android.content.Context
+import android.content.pm.PackageManager
+import androidx.core.app.ActivityCompat
+import androidx.core.content.ContextCompat
+
+interface PermissionUtil {
+    companion object {
+        const val REQUEST_CODE = K.PERMISSION_REQUEST_CODE
+
+        fun request(
+            activity: Activity, vararg permissions: String
+        ) {
+            ActivityCompat.requestPermissions(
+                activity, permissions, REQUEST_CODE
+            )
+        }
+
+        fun hasReadExternalStorage(context: Context): Boolean {
+            return ContextCompat.checkSelfPermission(
+                context, Manifest.permission.READ_EXTERNAL_STORAGE
+            ) == PackageManager.PERMISSION_GRANTED
+        }
+
+        fun requestReadExternalStorage(activity: Activity) = request(
+            activity, Manifest.permission.READ_EXTERNAL_STORAGE
+        )
+
+        fun hasWriteExternalStorage(context: Context): Boolean {
+            return ContextCompat.checkSelfPermission(
+                context, Manifest.permission.WRITE_EXTERNAL_STORAGE
+            ) == PackageManager.PERMISSION_GRANTED
+        }
+
+        fun requestWriteExternalStorage(activity: Activity) = request(
+            activity, Manifest.permission.WRITE_EXTERNAL_STORAGE
+        )
+    }
+}

np_android_core/src/main/java/com/nkming/nc_photos/np_android_core/Rgba8Image.kt

@@ -0,0 +1,44 @@
+package com.nkming.nc_photos.np_android_core
+
+import android.graphics.Bitmap
+import java.nio.ByteBuffer
+
+/**
+ * Container of pixel data stored in RGBA format
+ */
+class Rgba8Image(
+    val pixel: ByteArray, val width: Int, val height: Int
+) {
+    companion object {
+        fun fromJson(json: Map<String, Any>) = Rgba8Image(
+            json["pixel"] as ByteArray,
+            json["width"] as Int,
+            json["height"] as Int
+        )
+
+        fun fromBitmap(src: Bitmap): Rgba8Image {
+            assert(src.config == Bitmap.Config.ARGB_8888)
+            val buffer = ByteBuffer.allocate(src.width * src.height * 4).also {
+                src.copyPixelsToBuffer(it)
+            }
+            return Rgba8Image(buffer.array(), src.width, src.height)
+        }
+    }
+
+    fun toJson() = mapOf<String, Any>(
+        "pixel" to pixel,
+        "width" to width,
+        "height" to height,
+    )
+
+    fun toBitmap(): Bitmap {
+        return Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888)
+            .apply {
+                copyPixelsFromBuffer(ByteBuffer.wrap(pixel))
+            }
+    }
+
+    init {
+        assert(pixel.size == width * height * 4)
+    }
+}

np_android_core/src/main/java/com/nkming/nc_photos/np_android_core/UriUtil.kt

@@ -1,9 +1,8 @@
-package com.nkming.nc_photos.plugin
+package com.nkming.nc_photos.np_android_core
 
 import android.content.Context
 import android.net.Uri
 import android.provider.MediaStore
-import com.nkming.nc_photos.np_android_log.logI
 
 interface UriUtil {
 	companion object {

np_android_core/src/main/java/com/nkming/nc_photos/np_android_core/Util.kt

@@ -1,9 +1,8 @@
-package com.nkming.nc_photos.plugin
+package com.nkming.nc_photos.np_android_core
 
 import android.app.PendingIntent
 import android.os.Build
 import android.os.Bundle
-import com.nkming.nc_photos.np_android_log.logI
 import java.io.Serializable
 import java.net.HttpURLConnection
 

np_android_log/proguard-rules.pro

@@ -1,21 +0,0 @@
-# Add project specific ProGuard rules here.
-# You can control the set of applied configuration files using the
-# proguardFiles setting in build.gradle.
-#
-# For more details, see
-#   http://developer.android.com/guide/developing/tools/proguard.html
-
-# If your project uses WebView with JS, uncomment the following
-# and specify the fully qualified class name to the JavaScript interface
-# class:
-#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
-#   public *;
-#}
-
-# Uncomment this to preserve the line number information for
-# debugging stack traces.
-#-keepattributes SourceFile,LineNumberTable
-
-# If you keep the line number information, uncomment this to
-# hide the original source file name.
-#-renamesourcefileattribute SourceFile

np_android_log/settings.gradle

@@ -1 +0,0 @@
-rootProject.name = "np_android_log"

np_platform_image_processor/.gitignore

@@ -0,0 +1,30 @@
+# 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/

np_platform_image_processor/.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: f72efea43c3013323d1b95cff571f3c1caa37583
+  channel: stable
+
+project_type: plugin
+
+# Tracks metadata for the flutter migrate command
+migration:
+  platforms:
+    - platform: root
+      create_revision: f72efea43c3013323d1b95cff571f3c1caa37583
+      base_revision: f72efea43c3013323d1b95cff571f3c1caa37583
+    - platform: android
+      create_revision: f72efea43c3013323d1b95cff571f3c1caa37583
+      base_revision: f72efea43c3013323d1b95cff571f3c1caa37583
+    - platform: ios
+      create_revision: f72efea43c3013323d1b95cff571f3c1caa37583
+      base_revision: f72efea43c3013323d1b95cff571f3c1caa37583
+
+  # 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'

np_platform_image_processor/analysis_options.yaml

@@ -0,0 +1 @@
+include: package:np_lints/np.yaml

np_platform_image_processor/android/.gitignore

@@ -0,0 +1,9 @@
+*.iml
+.gradle
+/local.properties
+/.idea/workspace.xml
+/.idea/libraries
+.DS_Store
+/build
+/captures
+.cxx

np_platform_image_processor/android/build.gradle

@@ -0,0 +1,76 @@
+group 'com.nkming.nc_photos.np_platform_image_processor'
+version '1.0-SNAPSHOT'
+
+buildscript {
+    ext.kotlin_version = '1.8.20'
+    repositories {
+		google()
+		mavenCentral()
+		gradlePluginPortal()
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:7.4.2'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+        maven { url 'https://jitpack.io' }
+    }
+}
+
+apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android'
+
+android {
+    namespace 'com.nkming.nc_photos.np_platform_image_processor'
+   	compileSdk 31
+    ndkVersion "23.2.8568313"
+
+    defaultConfig {
+   		minSdk 21
+        ndk {
+            abiFilters "armeabi-v7a", "arm64-v8a", "x86_64"
+        }
+
+   		consumerProguardFiles "consumer-rules.pro"
+   	}
+    externalNativeBuild {
+        cmake {
+            path file('src/main/cpp/CMakeLists.txt')
+            version '3.18.1'
+        }
+    }
+
+    buildTypes {
+   		release {
+   			minifyEnabled false
+   			proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+   		}
+   	}
+    compileOptions {
+        coreLibraryDesugaringEnabled true
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+
+    lintOptions {
+        disable 'LongLogTag'
+    }
+}
+
+dependencies {
+    coreLibraryDesugaring "com.android.tools:desugar_jdk_libs:2.0.3"
+    implementation "androidx.annotation:annotation:1.6.0"
+    implementation "androidx.core:core-ktx:1.10.1"
+    implementation "androidx.exifinterface:exifinterface:1.3.6"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+    implementation 'com.nkming.nc_photos.np_android_core:np_android_core'
+}

np_platform_image_processor/android/gradle.properties

@@ -0,0 +1,3 @@
+org.gradle.jvmargs=-Xmx1536M
+android.useAndroidX=true
+android.enableJetifier=true

np_platform_image_processor/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-7.6.2-bin.zip

np_platform_image_processor/android/settings.gradle

@@ -0,0 +1,2 @@
+rootProject.name = 'np_platform_image_processor'
+includeBuild '../../np_android_core'

np_platform_image_processor/android/src/main/AndroidManifest.xml

@@ -0,0 +1,11 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+  package="com.nkming.nc_photos.np_platform_image_processor">
+
+	<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
+
+	<application>
+		<service
+			android:name=".ImageProcessorService"
+			android:exported="false" />
+	</application>
+</manifest>

np_platform_image_processor/android/src/main/cpp/CMakeLists.txt

@@ -8,7 +8,7 @@ cmake_minimum_required(VERSION 3.18.1)
 
 # Declares and names the project.
 
-project("plugin")
+project("np_platform_image_processor")
 
 # Creates and names a library, sets it as either STATIC
 # or SHARED, and provides the relative paths to its source code.
@@ -27,7 +27,7 @@ set_target_properties( renderscript-intrinsics-replacement-toolkit PROPERTIES IM
     ${dependency_DIR}/renderscript-intrinsics-replacement-toolkit/jni/${ANDROID_ABI}/librenderscript-toolkit.so )
 
 add_library( # Sets the name of the library.
-             plugin
+             np_platform_image_processor
 
              # Sets the library as a shared library.
              SHARED
@@ -62,7 +62,7 @@ add_library( # Sets the name of the library.
              util.cpp
              zero_dce.cpp
              )
-set_target_properties( plugin PROPERTIES COMPILE_OPTIONS -fopenmp )
+set_target_properties( np_platform_image_processor PROPERTIES COMPILE_OPTIONS -fopenmp )
 
 # Searches for a specified prebuilt library and stores the path as a
 # variable. Because CMake includes system libraries in the search path by
@@ -79,7 +79,7 @@ find_library( # Sets the name of the path variable.
 
 find_library( android-lib android )
 
-target_include_directories( plugin PRIVATE
+target_include_directories( np_platform_image_processor PRIVATE
                             ${dependency_DIR}/tensorflowlite/headers
                             ${dependency_DIR}/renderscript-intrinsics-replacement-toolkit/headers )
 
@@ -88,7 +88,7 @@ target_include_directories( plugin PRIVATE
 # build script, prebuilt third-party libraries, or system libraries.
 
 target_link_libraries( # Specifies the target library.
-                       plugin
+                       np_platform_image_processor
 
                        # Links the target library to the log library
                        # included in the NDK.

np_platform_image_processor/android/src/main/cpp/arbitrary_style_transfer.cpp

@@ -15,7 +15,7 @@
 #include "tflite_wrapper.h"
 #include "util.h"
 
-using namespace plugin;
+using namespace im_proc;
 using namespace std;
 using namespace tflite;
 
@@ -60,7 +60,7 @@ private:
 } // namespace
 
 extern "C" JNIEXPORT jbyteArray JNICALL
-Java_com_nkming_nc_1photos_plugin_image_1processor_ArbitraryStyleTransfer_inferNative(
+Java_com_nkming_nc_1photos_np_1platform_1image_1processor_processor_ArbitraryStyleTransfer_inferNative(
     JNIEnv *env, jobject *thiz, jobject assetManager, jbyteArray image,
     jint width, jint height, jbyteArray style, jfloat weight) {
   try {

np_platform_image_processor/android/src/main/cpp/arbitrary_style_transfer.h

@@ -7,7 +7,7 @@ extern "C" {
 #endif
 
 JNIEXPORT jbyteArray JNICALL
-Java_com_nkming_nc_1photos_plugin_image_1processor_ArbitraryStyleTransfer_inferNative(
+Java_com_nkming_nc_1photos_np_1platform_1image_1processor_processor_ArbitraryStyleTransfer_inferNative(
     JNIEnv *env, jobject *thiz, jobject assetManager, jbyteArray image,
     jint width, jint height, jbyteArray style, jfloat weight);
 

np_platform_image_processor/android/src/main/cpp/deep_lap_3.cpp

@@ -18,7 +18,7 @@
 #include "util.h"
 
 using namespace core;
-using namespace plugin;
+using namespace im_proc;
 using namespace renderscript;
 using namespace std;
 using namespace tflite;
@@ -151,7 +151,7 @@ private:
 } // namespace
 
 extern "C" JNIEXPORT jbyteArray JNICALL
-Java_com_nkming_nc_1photos_plugin_image_1processor_DeepLab3Portrait_inferNative(
+Java_com_nkming_nc_1photos_np_1platform_1image_1processor_processor_DeepLab3Portrait_inferNative(
     JNIEnv *env, jobject *thiz, jobject assetManager, jbyteArray image,
     jint width, jint height, jint radius) {
   try {
@@ -176,7 +176,7 @@ Java_com_nkming_nc_1photos_plugin_image_1processor_DeepLab3Portrait_inferNative(
 }
 
 extern "C" JNIEXPORT jbyteArray JNICALL
-Java_com_nkming_nc_1photos_plugin_image_1processor_DeepLab3ColorPop_inferNative(
+Java_com_nkming_nc_1photos_np_1platform_1image_1processor_processor_DeepLab3ColorPop_inferNative(
     JNIEnv *env, jobject *thiz, jobject assetManager, jbyteArray image,
     jint width, jint height, jfloat weight) {
   try {

np_platform_image_processor/android/src/main/cpp/deep_lap_3.h

@@ -7,12 +7,12 @@ extern "C" {
 #endif
 
 JNIEXPORT jbyteArray JNICALL
-Java_com_nkming_nc_1photos_plugin_image_1processor_DeepLab3Portrait_inferNative(
+Java_com_nkming_nc_1photos_np_1platform_1image_1processor_processor_DeepLab3Portrait_inferNative(
     JNIEnv *env, jobject *thiz, jobject assetManager, jbyteArray image,
     jint width, jint height, jint radius);
 
 JNIEXPORT jbyteArray JNICALL
-Java_com_nkming_nc_1photos_plugin_image_1processor_DeepLab3ColorPop_inferNative(
+Java_com_nkming_nc_1photos_np_1platform_1image_1processor_processor_DeepLab3ColorPop_inferNative(
     JNIEnv *env, jobject *thiz, jobject assetManager, jbyteArray image,
     jint width, jint height, jfloat weight);
 

np_platform_image_processor/android/src/main/cpp/esrgan.cpp

@@ -16,7 +16,7 @@
 #include "tflite_wrapper.h"
 #include "util.h"
 
-using namespace plugin;
+using namespace im_proc;
 using namespace std;
 using namespace tflite;
 
@@ -47,7 +47,7 @@ private:
 } // namespace
 
 extern "C" JNIEXPORT jbyteArray JNICALL
-Java_com_nkming_nc_1photos_plugin_image_1processor_Esrgan_inferNative(
+Java_com_nkming_nc_1photos_np_1platform_1image_1processor_processor_Esrgan_inferNative(
     JNIEnv *env, jobject *thiz, jobject assetManager, jbyteArray image,
     jint width, jint height) {
   try {

np_platform_image_processor/android/src/main/cpp/esrgan.h

@@ -7,7 +7,7 @@ extern "C" {
 #endif
 
 JNIEXPORT jbyteArray JNICALL
-Java_com_nkming_nc_1photos_plugin_image_1processor_Esrgan_inferNative(
+Java_com_nkming_nc_1photos_np_1platform_1image_1processor_processor_Esrgan_inferNative(
     JNIEnv *env, jobject *thiz, jobject assetManager, jbyteArray image,
     jint width, jint height);