Minor changes

libs/SubsamplingScaleImageView/build.gradle

@@ -6,6 +6,9 @@ version = '3.4.1'
 dependencies {
     compile fileTree(dir: 'libs', include: '*.jar')
     compile "com.android.support:support-annotations:23.1.1"
+    compile 'rapid.decoder:library:0.3.0'
+    compile 'rapid.decoder:jpeg-decoder:0.3.0'
+    compile 'rapid.decoder:png-decoder:0.3.0'
 }
 
 android {

libs/SubsamplingScaleImageView/src/com/davemorrissey/labs/subscaleview/decoder/RapidImageRegionDecoder.java

@@ -0,0 +1,53 @@
+package com.davemorrissey.labs.subscaleview.decoder;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.Point;
+import android.graphics.Rect;
+import android.net.Uri;
+
+import com.davemorrissey.labs.subscaleview.decoder.ImageRegionDecoder;
+
+import rapid.decoder.BitmapDecoder;
+
+/**
+ * A very simple implementation of {@link com.davemorrissey.labs.subscaleview.decoder.ImageRegionDecoder}
+ * using the RapidDecoder library (https://github.com/suckgamony/RapidDecoder). For PNGs, this can
+ * give more reliable decoding and better performance. For JPGs, it is slower and can run out of
+ * memory with large images, but has better support for grayscale and CMYK images.
+ *
+ * This is an incomplete and untested implementation provided as an example only.
+ */
+public class RapidImageRegionDecoder implements ImageRegionDecoder {
+
+    private BitmapDecoder decoder;
+
+    @Override
+    public Point init(Context context, Uri uri) throws Exception {
+        decoder = BitmapDecoder.from(context, uri);
+        decoder.useBuiltInDecoder(true);
+        return new Point(decoder.sourceWidth(), decoder.sourceHeight());
+    }
+
+    @Override
+    public synchronized Bitmap decodeRegion(Rect sRect, int sampleSize) {
+        try {
+            return decoder.reset().region(sRect).scale(sRect.width()/sampleSize, sRect.height()/sampleSize).decode();
+        } catch (Exception e) {
+            return null;
+        }
+    }
+
+    @Override
+    public boolean isReady() {
+        return decoder != null;
+    }
+
+    @Override
+    public void recycle() {
+        BitmapDecoder.destroyMemoryCache();
+        BitmapDecoder.destroyDiskCache();
+        decoder.reset();
+        decoder = null;
+    }
+}