Allow retrieving of GPUImage used in GPUImageView

Author: Patrick Boos

library/src/jp/co/cyberagent/android/gpuimage/GPUImageView.java

@@ -85,6 +85,15 @@ protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
         }
     }
 
+    /**
+     * Retrieve the GPUImage instance used by this view.
+     *
+     * @return used GPUImage instance
+     */
+    public GPUImage getGPUImage() {
+        return mGPUImage;
+    }
+
     // TODO Should be an xml attribute. But then GPUImage can not be distributed as .jar anymore.
     public void setRatio(float ratio) {
         mRatio = ratio;