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Allow resolution changes on all platforms

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Take aspect ratio into account when making the choice too.
This commit is contained in:
Cameron Gutman 2022-04-21 23:57:17 -05:00
commit 6c339551eb
1 changed files with 15 additions and 7 deletions
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22
app/streaming/session.cpp
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@ -1004,6 +1004,9 @@ void Session::updateOptimalWindowDisplayMode()
bestMode.refresh_rate = 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 == desktopMode.w && mode.h == desktopMode.h &&
mode.refresh_rate % m_StreamConfig.fps == 0) {
if (mode.refresh_rate > bestMode.refresh_rate) {
@ -1013,18 +1016,23 @@ 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) {
// If we didn't find a mode that matched the current resolution and
// had a high enough refresh rate, start looking for lower resolution
// modes that can meet the required refresh rate and minimum video
// resolution. We will also try to pick a display mode that matches
// aspect ratio closest to the video stream.
if (bestMode.refresh_rate == 0) {
float bestModeAspectRatio = 0;
float videoAspectRatio = (float)m_ActiveVideoWidth / (float)m_ActiveVideoHeight;
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);
float modeAspectRatio = (float)mode.w / (float)mode.h;
if (mode.w >= m_ActiveVideoWidth && mode.h >= m_ActiveVideoHeight &&
mode.refresh_rate % m_StreamConfig.fps == 0) {
if (mode.refresh_rate > bestMode.refresh_rate) {
if (mode.refresh_rate >= bestMode.refresh_rate &&
(bestModeAspectRatio == 0 || fabs(videoAspectRatio - modeAspectRatio) <= fabs(videoAspectRatio - bestModeAspectRatio))) {
bestMode = mode;
bestModeAspectRatio = modeAspectRatio;
}
}
}