content: /*******************************************************************************
   * Copyright 2013 Sergey Tarasevich
   *
   * 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.nostra13.universalimageloader.core.display;
  
  import android.graphics.*;
  import com.nostra13.universalimageloader.core.assist.LoadedFrom;
  import com.nostra13.universalimageloader.core.imageaware.ImageAware;
  import com.nostra13.universalimageloader.core.imageaware.ImageViewAware;
  
  /**
   * Can display bitmap with rounded corners and vignette effect. This implementation works only with ImageViews wrapped
   * in ImageViewAware.
   * <br />
   * This implementation is inspired by
   * <a href="http://www.curious-creature.org/2012/12/11/android-recipe-1-image-with-rounded-corners/">
   * Romain Guy's article</a>. It rounds images using custom drawable drawing. Original bitmap isn't changed.
   * <br />
   * <br />
   * If this implementation doesn't meet your needs then consider
   * <a href="https://github.com/vinc3m1/RoundedImageView">this project</a> for usage.
   *
   * @author Sergey Tarasevich (nostra13[at]gmail[dot]com)
   * @since 1.9.1
   */
  public class RoundedVignetteBitmapDisplayer extends RoundedBitmapDisplayer {
  
  	public RoundedVignetteBitmapDisplayer(int cornerRadiusPixels, int marginPixels) {
  		super(cornerRadiusPixels, marginPixels);
  	}
  
  	@Override
  	public void display(Bitmap bitmap, ImageAware imageAware, LoadedFrom loadedFrom) {
  		if (!(imageAware instanceof ImageViewAware)) {
  			throw new IllegalArgumentException("ImageAware should wrap ImageView. ImageViewAware is expected.");
  		}
  
  		imageAware.setImageDrawable(new RoundedVignetteDrawable(bitmap, cornerRadius, margin));
  	}
  
  	protected static class RoundedVignetteDrawable extends RoundedDrawable {
  
  		RoundedVignetteDrawable(Bitmap bitmap, int cornerRadius, int margin) {
  			super(bitmap, cornerRadius, margin);
  		}
  
  		@Override
  		protected void onBoundsChange(Rect bounds) {
  			super.onBoundsChange(bounds);
  			RadialGradient vignette = new RadialGradient(
  					mRect.centerX(), mRect.centerY() * 1.0f / 0.7f, mRect.centerX() * 1.3f,
  					new int[]{0, 0, 0x7f000000}, new float[]{0.0f, 0.7f, 1.0f},
  					Shader.TileMode.CLAMP);
  
  			Matrix oval = new Matrix();
  			oval.setScale(1.0f, 0.7f);
  			vignette.setLocalMatrix(oval);
  
  			paint.setShader(new ComposeShader(bitmapShader, vignette, PorterDuff.Mode.SRC_OVER));
  		}
  	}
  }
  