content: package barreto.alessandro.feedlist.adapter;
  
  
  /*
   * Copyright 2014 Julian Shen
   *
   * 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.
   */
  
  import android.content.Context;
  import android.graphics.Bitmap;
  import android.graphics.BitmapShader;
  import android.graphics.Canvas;
  import android.graphics.Paint;
  
  import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;
  import com.bumptech.glide.load.resource.bitmap.BitmapTransformation;
  
  /**
   * Created by julian on 13/6/21.
   */
  public class CircleTransform extends BitmapTransformation {
  
      public CircleTransform(Context context) {
          super(context);
      }
  
      @Override
      protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) {
          if (toTransform == null) return null;
  
          int size = Math.min(toTransform.getWidth(), toTransform.getHeight());
          int x = (toTransform.getWidth() - size) / 2;
          int y = (toTransform.getHeight() - size) / 2;
  
          // TODO this could be acquired from the pool too
          Bitmap squared = Bitmap.createBitmap(toTransform, x, y, size, size);
  
          Bitmap result = pool.get(size, size, Bitmap.Config.ARGB_8888);
          if (result == null) {
              result = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
          }
  
          Canvas canvas = new Canvas(result);
          Paint paint = new Paint();
          paint.setShader(new BitmapShader(squared, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));
          paint.setAntiAlias(true);
          float r = size / 2f;
          canvas.drawCircle(r, r, r, paint);
          return result;
      }
  
      @Override
      public String getId() {
          return  getClass().getName();
      }
  }