-// sets hardware gamma correction, returns false if the device does not
-// support gamma control
-// (ONLY called by VID_UpdateGamma and VID_RestoreSystemGamma)
-int VID_SetGamma(unsigned short *ramps, int rampsize);
-// gets hardware gamma correction, returns false if the device does not
-// support gamma control
-// (ONLY called by VID_UpdateGamma and VID_RestoreSystemGamma)
-int VID_GetGamma(unsigned short *ramps, int rampsize);
-// makes sure ramp arrays are big enough and calls VID_GetGamma/VID_SetGamma