On 10/16/10 8:12 PM, doh123 wrote: > I need to know exactly how Wine tells the X server to change gamma settings... so gamma controls in games can work. Basically I need to know.. when a game has like a gamma adjust bar, and it moves... what specifically happens behind the scenes. The game calls SetDeviceGammaRamp(), or something that ultimately calls SetDeviceGammaRamp(). SetDeviceGammaRamp() has a driver entry-point that GDI calls. The x11drv implementation uses the XFree86 VidMode extension to set the gamma--this requires version 2 or better of the xf86vm extension. > > I need to know this because right now Xquartz on Mac OS X does not support doing this at all, This is because it doesn't support the xf86vm extension. > and I'd like to be able to add that ability into it... but I do not know how it works. This is the extension you need to implement. Luckily, it's similar to other such interfaces, such as Quartz Display Services in Mac OS X or the GDI functions. Take a look at the headers "xf86vm.h", "xf86vmode.h", and "xf86vmproto.h", all in <X11/extensions>. Chip
