PictureBitmapTextureAtlasSource.java 文件源码

@Override
public Bitmap onLoadBitmap(final Config pBitmapConfig) {
    final Picture picture = this.mPicture;
    if(picture == null) {
        Debug.e("Failed loading Bitmap in " + this.getClass().getSimpleName() + ".");
        return null;
    }

    final Bitmap bitmap = Bitmap.createBitmap(this.mTextureWidth, this.mTextureHeight, pBitmapConfig);
    final Canvas canvas = new Canvas(bitmap);

    final float scaleX = (float)this.mTextureWidth / this.mPicture.getWidth();
    final float scaleY = (float)this.mTextureHeight / this.mPicture.getHeight();
    canvas.scale(scaleX, scaleY, 0, 0);

    picture.draw(canvas);

    return bitmap;
}