Add an option to reencode images under the advanced tab. #262

app/src/main/java/eu/kanade/tachiyomi/util/OkioExtensions.kt

@@ -1,5 +1,7 @@
 package eu.kanade.tachiyomi.util
 
+import android.graphics.Bitmap
+import android.graphics.BitmapFactory
 import okio.BufferedSource
 import okio.Okio
 import java.io.File
@@ -36,4 +38,25 @@ fun BufferedSource.saveTo(stream: OutputStream) {
             it.flush()
         }
     }
+}
+
+/**
+ * Saves the given source to an output stream and closes both resources.
+ * The source is expected to be an image, and it may reencode the image.
+ *
+ * @param stream the stream where the source is copied.
+ * @param reencode whether to reencode the image or not.
+ */
+fun BufferedSource.saveImageTo(stream: OutputStream, reencode: Boolean = false) {
+    if (reencode) {
+        use {
+            val bitmap = BitmapFactory.decodeStream(it.inputStream())
+            stream.use {
+                bitmap.compress(Bitmap.CompressFormat.JPEG, 100, it)
+            }
+            bitmap.recycle()
+        }
+    } else {
+        saveTo(stream)
+    }
 }