Hi, I’m working on an open-source, simplified NVIDIA Control Panel for gamers to set custom resolutions and colors with profiles. I’m using NVAPI for this, and I’ve encountered an issue with the NvAPI_DISP_TryCustomDisplay function. After calling this function, the display position resets to default on multi-monitor setup, and I don’t know how to avoid this behavior.
For reference, when changing the resolution to a custom one in the NVIDIA Control Panel, it doesn’t reset the display position. This is what I mean by the “display position”: Imgur: The magic of the Internet
My implementation:
int nvapi_try_custom_display(unsigned int displayId, CustomDisplaySettings settings)
{
NV_CUSTOM_DISPLAY custDisp = {0};
custDisp.version = NV_CUSTOM_DISPLAY_VER;
custDisp.width = settings.width;
custDisp.height = settings.height;
custDisp.depth = 32;
custDisp.srcPartition = {0, 0, 1.0, 1.0};
custDisp.xRatio = 1;
custDisp.yRatio = 1;
NV_TIMING_INPUT timing = {0};
timing.version = NV_TIMING_INPUT_VER;
timing.width = settings.width;
timing.height = settings.height;
timing.rr = settings.refresh;
NvU32 displayIds[1] = {static_cast<NvU32>(displayId)};
// Get proper timing values from NVAPI
NvAPI_Status ret = NvAPI_DISP_GetTiming(displayIds[0], &timing, &custDisp.timing);
if (ret != NVAPI_OK)
{
return ret;
}
return NvAPI_DISP_TryCustomDisplay(displayIds, 1, &custDisp);
}