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Fix native resolution detection on high DPI wayland systems

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This commit is contained in:
Cameron Gutman 2022-08-16 00:25:49 -05:00
commit b0804ce048
4 changed files with 24 additions and 9 deletions
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27
app/streaming/streamutils.cpp
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@ -94,7 +94,7 @@ int StreamUtils::getDisplayRefreshRate(SDL_Window* window)
return mode.refresh_rate;
}
bool StreamUtils::getRealDesktopMode(int displayIndex, SDL_DisplayMode* mode)
bool StreamUtils::getNativeDesktopMode(int displayIndex, SDL_DisplayMode* mode)
{
#ifdef Q_OS_DARWIN
#define MAX_DISPLAYS 16
@ -138,11 +138,26 @@ bool StreamUtils::getRealDesktopMode(int displayIndex, SDL_DisplayMode* mode)
}
}
#else
if (SDL_GetDesktopDisplayMode(displayIndex, mode) != 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"SDL_GetDesktopDisplayMode() failed: %s",
SDL_GetError());
return false;
// We need to get the true display resolution without DPI scaling (since we use High DPI).
// Windows returns the real display resolution here, even if DPI scaling is enabled.
// macOS and Wayland report a resolution that includes the DPI scaling factor. Picking
// the first mode on Wayland will get the native resolution without the scaling factor
// (and macOS is handled in the #ifdef above).
if (!strcmp(SDL_GetCurrentVideoDriver(), "wayland")) {
if (SDL_GetDisplayMode(displayIndex, 0, mode) != 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"SDL_GetDisplayMode() failed: %s",
SDL_GetError());
return false;
}
}
else {
if (SDL_GetDesktopDisplayMode(displayIndex, mode) != 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"SDL_GetDesktopDisplayMode() failed: %s",
SDL_GetError());
return false;
}
}
#endif