Reduce the use of filters

After the filter function is added to the bitmap, Flash Player creates two bitmaps in the memory. The two bitmaps are of the same size as the actual object, and the other is a raster bitmap, the other is the bitmap used to generate the filter. When modifying some filter attributes, the two bitmaps in the memory will be updated to create the generated bitmap. This process involves some CPU processing, these two bitmaps may occupy a large amount of memory. Therefore, bitmaps created by the creation tool are generally used to simulate the filter effect.