package jp.wasabeef.blurry.internal;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffColorFilter;
import android.support.v8.renderscript.Allocation;
import android.support.v8.renderscript.Element;
import android.support.v8.renderscript.RenderScript;
import android.support.v8.renderscript.ScriptIntrinsicBlur;
import android.view.View;

/**
 * Copyright (C) 2015 Wasabeef
 *
 * 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.
 */

public class Blur {

  public static Bitmap rs(View view, BlurFactor factor) {
    view.setDrawingCacheEnabled(true);
    view.destroyDrawingCache();
    Bitmap cache = view.getDrawingCache();
    Bitmap bitmap = rs(view.getContext(), cache, factor);
    cache.recycle();
    view.setDrawingCacheEnabled(false);
    return bitmap;
  }

  public static Bitmap rs(Context context, Bitmap source, BlurFactor factor) {
    int width = factor.width / factor.sampling;
    int height = factor.height / factor.sampling;

    if (Helper.hasZero(width, height)) {
      return null;
    }

    Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);

    Canvas canvas = new Canvas(bitmap);
    canvas.scale(1 / (float) factor.sampling, 1 / (float) factor.sampling);
    Paint paint = new Paint();
    paint.setFlags(Paint.FILTER_BITMAP_FLAG | Paint.ANTI_ALIAS_FLAG);
    PorterDuffColorFilter filter =
        new PorterDuffColorFilter(factor.color, PorterDuff.Mode.SRC_ATOP);
    paint.setColorFilter(filter);
    canvas.drawBitmap(source, 0, 0, paint);

    RenderScript rs = RenderScript.create(context);
    Allocation input = Allocation.createFromBitmap(rs, bitmap, Allocation.MipmapControl.MIPMAP_NONE,
        Allocation.USAGE_SCRIPT);
    Allocation output = Allocation.createTyped(rs, input.getType());
    ScriptIntrinsicBlur blur = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));

    blur.setInput(input);
    blur.setRadius(factor.radius);
    blur.forEach(output);
    output.copyTo(bitmap);

    rs.destroy();

    if (factor.sampling == BlurFactor.DEFAULT_SAMPLING) {
      return bitmap;
    } else {
      Bitmap scaled = Bitmap.createScaledBitmap(bitmap, factor.width, factor.height, true);
      bitmap.recycle();
      return scaled;
    }
  }
}

@@ -1350,48 +1350,8 @@
 ();%0A
-    view.setDrawingCacheEnabled(false);%0A
     

remove set