Method nativeGrayToAlpha

src/com/cloudream/ishow/algorithm/Effect.java:302–302

(Bitmap src, Bitmap dst)

	private static native void nativeTone(Bitmap bitmap, int color, float amount);
	
	private static native void nativeGrayToAlpha(Bitmap src, Bitmap dst);
	private static native void nativeColorToAlpha(int color, Bitmap src, Bitmap dst);
	
	private static native void nativeSelectContiguousRegionByColor(Bitmap mask, Bitmap image, int color, int select_criterion,