IMAGEBUF Field - ulFlags

 ulFlags (ULONG) 
    Image buf flag. 

    This flag has the following values: 

    IBF_Y_ORG_BOTTOM 
                   0x0001; origin is set at bottom 

                   Note:  This flag can be used as an optimization for 
                          8-bpp images for the following two conditions: 

                     1. The hardware has support for cached custom 
                        palettes, and the client application is playing 
                        frames using the same palette. The driver will 
                        return IMG_CAPS_PAL_CACHING if it has this 
                        support. 

                     2. The screen is in 256-color mode and the source 
                        image bits have already been translated to the 
                        current hardware palette. 

    IBF_IGNORE_CUST_PAL 
                   0x0002; ignore the custom palette