DrawableToBitmapConverter.java 文件源码

@Nullable
static Resource<Bitmap> convert(BitmapPool bitmapPool, Drawable drawable, int width, int height) {
  // Handle DrawableContainer or StateListDrawables that may contain one or more BitmapDrawables.
  drawable = drawable.getCurrent();
  Bitmap result = null;
  boolean isRecycleable = false;
  if (drawable instanceof BitmapDrawable) {
    result = ((BitmapDrawable) drawable).getBitmap();
  } else if (!(drawable instanceof Animatable)) {
    result = drawToBitmap(bitmapPool, drawable, width, height);
    // We created and drew to the Bitmap, so it's safe for us to recycle or re-use.
    isRecycleable = true;
  }

  BitmapPool toUse = isRecycleable ? bitmapPool : NO_RECYCLE_BITMAP_POOL;
  return BitmapResource.obtain(result, toUse);
}