Identifies the different modes of palette handling.
Values:
IG_DSPL_PALETTE_HIGH | Use the palette in the high priority mode. This means that the operating system palette manager will try to best map colors of DevicePalette to the system palette. |
IG_DSPL_PALETTE_LOW | Use the palette in the low priority mode. In this mode the palette manager will try to best preserve current view of the destination while drawing the new image on it. |
IG_DSPL_PALETTE_DISABLE | Not to implement DevicePalette in the destination device while drawing the image. |