/*
* Copyright 2014 Google Inc. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.example.leanback;
import android.content.Context;
import android.graphics.Bitmap;
import android.renderscript.Allocation;
import android.renderscript.Element;
import android.renderscript.RenderScript;
import android.renderscript.ScriptIntrinsicBlur;
import com.squareup.picasso.Transformation;
public class BlurTransform implements Transformation {
RenderScript rs;
static BlurTransform blurTransform;
protected BlurTransform() {
// Exists only to defeat instantiation.
}
private BlurTransform(Context context) {
super();
rs = RenderScript.create(context);
}
public static BlurTransform getInstance(Context context) {
if (blurTransform == null) {
blurTransform = new BlurTransform(context);
}
return blurTransform;
}
@Override
public Bitmap transform(Bitmap bitmap) {
// Create another bitmap that will hold the results of the filter.
Bitmap blurredBitmap = Bitmap.createBitmap(bitmap);
// Allocate memory for Renderscript to work with
Allocation input = Allocation.createFromBitmap(rs, bitmap, Allocation.MipmapControl.MIPMAP_FULL, Allocation.USAGE_SHARED);
Allocation output = Allocation.createTyped(rs, input.getType());
// Load up an instance of the specific script that we want to use.
ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));
script.setInput(input);
// Set the blur radius
script.setRadius(20);
// Start the ScriptIntrinisicBlur
script.forEach(output);
// Copy the output to the blurred bitmap
output.copyTo(blurredBitmap);
bitmap.recycle();
return blurredBitmap;
}
@Override
public String key() {
return "blur";
}
}