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Change display mode when using KMSDRM backend

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Cameron Gutman 2021-12-18 21:07:35 -06:00
parent 6d63d6c54a
commit e56bb6785f
1 changed files with 18 additions and 0 deletions
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18
app/streaming/session.cpp
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@ -919,6 +919,24 @@ void Session::updateOptimalWindowDisplayMode()
}
}
// For KMSDRM backends where we exclusively own the display, we should opt
// to change the resolution if that allows us to hit the desired frame rate
if (bestMode.refresh_rate == 0 && strcmp(SDL_GetCurrentVideoDriver(), "KMSDRM") == 0) {
for (int i = 0; i < SDL_GetNumDisplayModes(displayIndex); i++) {
if (SDL_GetDisplayMode(displayIndex, i, &mode) == 0) {
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
"Detected display mode: %dx%dx%d",
mode.w, mode.h, mode.refresh_rate);
if (mode.w >= m_ActiveVideoWidth && mode.h >= m_ActiveVideoHeight &&
mode.refresh_rate % m_StreamConfig.fps == 0) {
if (mode.refresh_rate > bestMode.refresh_rate) {
bestMode = mode;
}
}
}
}
}
if (bestMode.refresh_rate == 0) {
// We may find no match if the user has moved a 120 FPS
// stream onto a 60 Hz monitor (since no refresh rate can