Support for image compression on Android 10

CHANGES.md

@@ -23,6 +23,7 @@ Bugfix 🐛:
  - Can't handle ongoing call events in background (#1992)
  - Crash / Attachment viewer: Cannot draw a recycled Bitmap #2034
  - Login with Matrix-Id | Autodiscovery fails if identity server is invalid and Homeserver ok (#2027)
+ - Support for image compression on Android 10
 
 Translations 🗣:
  -

matrix-sdk-android/build.gradle

@@ -144,7 +144,6 @@ dependencies {
 
     // Image
     implementation 'androidx.exifinterface:exifinterface:1.3.0-alpha01'
-    implementation 'id.zelory:compressor:3.0.0'
 
     // Database
     implementation 'com.github.Zhuinden:realm-monarchy:0.5.1'

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/content/ImageCompressor.kt

@@ -0,0 +1,147 @@
+/*
+ * Copyright (c) 2020 New Vector Ltd
+ * Copyright 2020 The Matrix.org Foundation C.I.C.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.matrix.android.sdk.internal.session.content
+
+import android.content.Context
+import android.graphics.Bitmap
+import android.graphics.BitmapFactory
+import android.graphics.Matrix
+import android.net.Uri
+import androidx.core.content.FileProvider
+import androidx.exifinterface.media.ExifInterface
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import org.matrix.android.sdk.internal.di.SessionDownloadsDirectory
+import timber.log.Timber
+import java.io.File
+import java.text.SimpleDateFormat
+import java.util.Date
+import java.util.Locale
+import javax.inject.Inject
+import kotlin.coroutines.CoroutineContext
+
+class ImageCompressor @Inject constructor(
+        @SessionDownloadsDirectory
+        private val sessionCacheDirectory: File
+) {
+
+    private val cacheFolder = File(sessionCacheDirectory, "MF")
+
+    suspend fun compress(
+            context: Context,
+            imageUri: Uri,
+            desiredWidth: Int = 612,
+            desiredHeight: Int = 816,
+            desiredQuality: Int = 80,
+            coroutineContext: CoroutineContext = Dispatchers.IO
+    ): Uri = withContext(coroutineContext) {
+        val compressedBitmap = BitmapFactory.Options().run {
+            inJustDecodeBounds = true
+            decodeBitmap(context, imageUri, this)
+            inSampleSize = calculateInSampleSize(outWidth, outHeight, desiredWidth, desiredHeight)
+            inJustDecodeBounds = false
+            decodeBitmap(context, imageUri, this)?.let {
+                rotateBitmap(context, imageUri, it)
+            }
+        } ?: return@withContext imageUri
+
+        val destinationUri = createDestinationUri(context)
+
+        context.contentResolver.openOutputStream(destinationUri).use {
+            compressedBitmap.compress(Bitmap.CompressFormat.JPEG, desiredQuality, it)
+        }
+
+        return@withContext destinationUri
+    }
+
+    private fun rotateBitmap(context: Context, uri: Uri, bitmap: Bitmap): Bitmap {
+        context.contentResolver.openInputStream(uri)?.use { inputStream ->
+            try {
+                ExifInterface(inputStream).let { exifInfo ->
+                    val orientation = exifInfo.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL)
+                    val matrix = Matrix()
+                    when (orientation) {
+                        ExifInterface.ORIENTATION_ROTATE_270 -> matrix.postRotate(270f)
+                        ExifInterface.ORIENTATION_ROTATE_180 -> matrix.postRotate(180f)
+                        ExifInterface.ORIENTATION_ROTATE_90 -> matrix.postRotate(90f)
+                        ExifInterface.ORIENTATION_FLIP_HORIZONTAL -> matrix.preScale(-1f, 1f)
+                        ExifInterface.ORIENTATION_FLIP_VERTICAL -> matrix.preScale(1f, -1f)
+                        ExifInterface.ORIENTATION_TRANSPOSE -> {
+                            matrix.preRotate(-90f)
+                            matrix.preScale(-1f, 1f)
+                        }
+                        ExifInterface.ORIENTATION_TRANSVERSE -> {
+                            matrix.preRotate(90f)
+                            matrix.preScale(-1f, 1f)
+                        }
+                        else                                      -> return bitmap
+                    }
+                    return Bitmap.createBitmap(bitmap, 0, 0, bitmap.width, bitmap.height, matrix, true)
+                }
+            } catch (e: Exception) {
+                Timber.e(e, "Cannot read orientation: %s", uri.toString())
+            }
+        }
+        return bitmap
+    }
+
+    // https://developer.android.com/topic/performance/graphics/load-bitmap
+    private fun calculateInSampleSize(width: Int, height: Int, desiredWidth: Int, desiredHeight: Int): Int {
+        var inSampleSize = 1
+
+        if (width > desiredWidth || height > desiredHeight) {
+            val halfHeight: Int = height / 2
+            val halfWidth: Int = width / 2
+
+            // Calculate the largest inSampleSize value that is a power of 2 and keeps both
+            // height and width larger than the requested height and width.
+            while (halfHeight / inSampleSize >= desiredHeight && halfWidth / inSampleSize >= desiredWidth) {
+                inSampleSize *= 2
+            }
+        }
+
+        return inSampleSize
+    }
+
+    private fun decodeBitmap(context: Context, uri: Uri, options: BitmapFactory.Options = BitmapFactory.Options()): Bitmap? {
+        return try {
+            context.contentResolver.openInputStream(uri)?.use { inputStream ->
+                BitmapFactory.decodeStream(inputStream, null, options)
+            }
+        } catch (e: Exception) {
+            Timber.e(e, "Cannot decode Bitmap: %s", uri.toString())
+            null
+        }
+    }
+
+    private fun createDestinationUri(context: Context): Uri {
+        val file = createTempFile()
+        val authority = "${context.packageName}.mx-sdk.fileprovider"
+        return FileProvider.getUriForFile(context, authority, file)
+    }
+
+    private fun createTempFile(): File {
+        if (!cacheFolder.exists()) cacheFolder.mkdirs()
+        val timeStamp: String = SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault()).format(Date())
+        return File.createTempFile(
+                "${timeStamp}_", /* prefix */
+                ".jpg", /* suffix */
+                cacheFolder /* directory */
+        )
+    }
+}

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/content/UploadContentWorker.kt

@@ -19,11 +19,11 @@ package org.matrix.android.sdk.internal.session.content
 
 import android.content.Context
 import android.graphics.BitmapFactory
+import androidx.core.net.toFile
+import androidx.core.net.toUri
 import androidx.work.CoroutineWorker
 import androidx.work.WorkerParameters
 import com.squareup.moshi.JsonClass
-import id.zelory.compressor.Compressor
-import id.zelory.compressor.constraint.default
 import org.matrix.android.sdk.api.extensions.tryThis
 import org.matrix.android.sdk.api.session.content.ContentAttachmentData
 import org.matrix.android.sdk.api.session.events.model.Event
@@ -74,6 +74,7 @@ internal class UploadContentWorker(val context: Context, params: WorkerParameter
     @Inject lateinit var contentUploadStateTracker: DefaultContentUploadStateTracker
     @Inject lateinit var fileService: DefaultFileService
     @Inject lateinit var cancelSendTracker: CancelSendTracker
+    @Inject lateinit var imageCompressor: ImageCompressor
 
     override suspend fun doWork(): Result {
         val params = WorkerParamsFactory.fromData<Params>(inputData)
@@ -180,26 +181,20 @@ internal class UploadContentWorker(val context: Context, params: WorkerParameter
                 val fileToUplaod: File
 
                 if (attachment.type == ContentAttachmentData.Type.IMAGE && params.compressBeforeSending) {
-                    // Compressor library works with File instead of Uri for now. Since Scoped Storage doesn't allow us to access files directly, we should
-                    // copy it to a cache folder by using InputStream and OutputStream.
-                    // https://github.com/zetbaitsu/Compressor/pull/150
-                    // As soon as the above PR is merged, we can use attachment.queryUri instead of creating a cacheFile.
-                    val compressedFile = Compressor.compress(context, workingFile) {
-                        default(
-                                width = MAX_IMAGE_SIZE,
-                                height = MAX_IMAGE_SIZE
-                        )
-                    }
-
+                    fileToUplaod = imageCompressor.compress(context, workingFile.toUri(), MAX_IMAGE_SIZE, MAX_IMAGE_SIZE)
+                            .also { compressedUri ->
+                                context.contentResolver.openInputStream(compressedUri)?.use {
                                     val options = BitmapFactory.Options().apply { inJustDecodeBounds = true }
-                    BitmapFactory.decodeFile(compressedFile.absolutePath, options)
-                    val fileSize = compressedFile.length().toInt()
+                                    val bitmap = BitmapFactory.decodeStream(it, null, options)
+                                    val fileSize = bitmap?.byteCount ?: 0
                                     newImageAttributes = NewImageAttributes(
                                             options.outWidth,
                                             options.outHeight,
                                             fileSize
                                     )
-                    fileToUplaod = compressedFile
+                                }
+                            }
+                            .toFile()
                 } else {
                     fileToUplaod = workingFile
                 }

vector/src/main/assets/open_source_licenses.html

@@ -313,11 +313,6 @@ SOFTWARE.
         <br/>
         Copyright (c) 2012-2016 Dan Wheeler and Dropbox, Inc.
     </li>
-    <li>
-        <b>Compressor</b>
-        <br/>
-        Copyright (c) 2016 Zetra.
-    </li>
     <li>
         <b>com.otaliastudios:autocomplete</b>
         <br/>