ImageOverlayProcessor.java

package at.favre.lib.dali.builder.processor;

import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.support.v8.renderscript.Allocation;
import android.support.v8.renderscript.Element;
import android.support.v8.renderscript.RenderScript;
import android.support.v8.renderscript.ScriptIntrinsicBlend;

import at.favre.lib.dali.R;

/**
 * Created by PatrickF on 27.05.2014.
 */
public class ImageOverlayProcessor implements IBitmapProcessor {
	private RenderScript rs;
	private Resources res;

	public ImageOverlayProcessor(RenderScript rs, Resources res) {
		this.rs = rs;
		this.res = res;
	}

	@Override
	public Bitmap manipulate(Bitmap original) {
		final Allocation input1 = Allocation.createFromBitmap(rs, original);
		final Allocation input2 = Allocation.createFromBitmap(rs, getBlendImage(original));
		final ScriptIntrinsicBlend blendScript = ScriptIntrinsicBlend.create(rs, Element.U8_4(rs));
		blendScript.forEachSrcOver(input2,input1);
		input1.copyTo(original);
		return original;
	}

	public Bitmap getBlendImage(Bitmap original) {
		Bitmap frost =  BitmapFactory.decodeResource(res, R.drawable.frost4);
		return Bitmap.createScaledBitmap(frost,original.getWidth(),original.getHeight(),true);
	}

	@Override
	public String getProcessorTag() {
		return this.getClass().getSimpleName();
	}
}