The ICM_DRAW_REALIZE message is sent to a rendering driver to realize its palette used while drawing.
Returns ICERR_OK if the palette is realized. If this message is not supported, the driver returns ICERR_UNSUPPORTED.
Drivers need to respond to this message only if the drawing palette is different from the decompressed palette.
If this message is not supported, the palette associated with the decompressed data is realized.