content: /*
   * Copyright (C) 2014 The Android Open Source Project
   *
   * 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.lb.launcher;
  
  import android.content.Context;
  import android.graphics.Bitmap;
  import android.graphics.Canvas;
  import android.graphics.Paint;
  import android.view.View;
  
  public class FastBitmapView extends View {
  
      private final Paint mPaint = new Paint(Paint.FILTER_BITMAP_FLAG);
      private Bitmap mBitmap;
  
      public FastBitmapView(Context context) {
          super(context);
      }
  
      /**
       * Applies the new bitmap.
       * @return true if the view was invalidated.
       */
      public boolean setBitmap(Bitmap b) {
          if (b != mBitmap){
              if (mBitmap != null) {
                  invalidate(0, 0, mBitmap.getWidth(), mBitmap.getHeight());
              }
              mBitmap = b;
              if (mBitmap != null) {
                  invalidate(0, 0, mBitmap.getWidth(), mBitmap.getHeight());
              }
              return true;
          }
          return false;
      }
  
      @Override
      protected void onDraw(Canvas canvas) {
          if (mBitmap != null) {
              canvas.drawBitmap(mBitmap, 0, 0, mPaint);
          }
      }
  }
  