BitmapSurfaceRenderer.java 文件源码

/**
 * Set the Background bitmap
 *
 * @param inputStream InputStream to the raw data of the bitmap
 */
public void setBitmap(InputStream inputStream) throws IOException {
  FlushedInputStream fixedInput = new FlushedInputStream(inputStream);
  BitmapFactory.Options opt = new BitmapFactory.Options();
  decoder = BitmapRegionDecoder.newInstance(fixedInput, false);
  fixedInput.reset();
  // Grab the bounds of the background bitmap
  opt.inPreferredConfig = DEFAULT_CONFIG;
  opt.inJustDecodeBounds = true;
  GameLog.d(TAG, "Decode inputStream for Background Bitmap");
  BitmapFactory.decodeStream(fixedInput, null, opt);
  fixedInput.reset();
  backgroundSize.set(opt.outWidth, opt.outHeight);
  GameLog.d(TAG, "Background Image: w=" + opt.outWidth + " h=" + opt.outHeight);
  // Create the low resolution background
  opt.inJustDecodeBounds = false;
  opt.inSampleSize = 1 << sampleSize;
  lowResBitmap = BitmapFactory.decodeStream(fixedInput, null, opt);
  GameLog.d(TAG, "Low Res Image: w=" + lowResBitmap.getWidth() + " h=" + lowResBitmap.getHeight());
  // Initialize cache
  if (cachedBitmap.getState() == CacheState.NOT_INITIALIZED) {
    synchronized (cachedBitmap) {
      cachedBitmap.setState(CacheState.IS_INITIALIZED);
    }
  }
}