content: package com.github.airsaid.accountbook.widget.transform;
  
  /**
   * 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.
   */
  
  import android.content.Context;
  import android.graphics.Bitmap;
  import android.graphics.Canvas;
  import android.graphics.Paint;
  import android.graphics.PorterDuff;
  import android.graphics.PorterDuffXfermode;
  import android.graphics.drawable.Drawable;
  
  import com.bumptech.glide.Glide;
  import com.bumptech.glide.load.Transformation;
  import com.bumptech.glide.load.engine.Resource;
  import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;
  import com.bumptech.glide.load.resource.bitmap.BitmapResource;
  import com.github.airsaid.accountbook.widget.transform.internal.Utils;
  
  public class MaskTransformation implements Transformation<Bitmap> {
  
    private static Paint sMaskingPaint = new Paint();
    private Context mContext;
    private BitmapPool mBitmapPool;
    private int mMaskId;
  
    static {
      sMaskingPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
    }
  
    /**
     * @param maskId If you change the mask file, please also rename the mask file, or Glide will get
     * the cache with the old mask. Because getId() return the same values if using the
     * same make file name. If you have a good idea please tell us, thanks.
     */
    public MaskTransformation(Context context, int maskId) {
      this(context, Glide.get(context).getBitmapPool(), maskId);
    }
  
    public MaskTransformation(Context context, BitmapPool pool, int maskId) {
      mBitmapPool = pool;
      mContext = context.getApplicationContext();
      mMaskId = maskId;
    }
  
    @Override
    public Resource<Bitmap> transform(Resource<Bitmap> resource, int outWidth, int outHeight) {
      Bitmap source = resource.get();
  
      int width = source.getWidth();
      int height = source.getHeight();
  
      Bitmap result = mBitmapPool.get(width, height, Bitmap.Config.ARGB_8888);
      if (result == null) {
        result = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
      }
  
      Drawable mask = Utils.getMaskDrawable(mContext, mMaskId);
  
      Canvas canvas = new Canvas(result);
      mask.setBounds(0, 0, width, height);
      mask.draw(canvas);
      canvas.drawBitmap(source, 0, 0, sMaskingPaint);
  
      return BitmapResource.obtain(result, mBitmapPool);
    }
  
    @Override public String getId() {
      return "MaskTransformation(maskId=" + mContext.getResources().getResourceEntryName(mMaskId)
          + ")";
    }
  }
  