main: Enable High DPI fixes for Qt >= 5.14 (#6262)

Fixes https://github.com/citra-emu/citra/issues/4175
Fixes https://github.com/citra-emu/citra/issues/4977
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Morph 2023-02-09 19:19:43 -05:00 committed by GitHub
parent 6bef34852c
commit 5eb72e9489
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1 changed files with 51 additions and 0 deletions

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@ -2663,6 +2663,55 @@ void GMainWindow::SetDiscordEnabled([[maybe_unused]] bool state) {
#undef main #undef main
#endif #endif
static void SetHighDPIAttributes() {
#ifdef _WIN32
// For Windows, we want to avoid scaling artifacts on fractional scaling ratios.
// This is done by setting the optimal scaling policy for the primary screen.
// Create a temporary QApplication.
int temp_argc = 0;
char** temp_argv = nullptr;
QApplication temp{temp_argc, temp_argv};
// Get the current screen geometry.
const QScreen* primary_screen = QGuiApplication::primaryScreen();
if (primary_screen == nullptr) {
return;
}
const QRect screen_rect = primary_screen->geometry();
const int real_width = screen_rect.width();
const int real_height = screen_rect.height();
const float real_ratio = primary_screen->logicalDotsPerInch() / 96.0f;
// Recommended minimum width and height for proper window fit.
// Any screen with a lower resolution than this will still have a scale of 1.
constexpr float minimum_width = 1350.0f;
constexpr float minimum_height = 900.0f;
const float width_ratio = std::max(1.0f, real_width / minimum_width);
const float height_ratio = std::max(1.0f, real_height / minimum_height);
// Get the lower of the 2 ratios and truncate, this is the maximum integer scale.
const float max_ratio = std::trunc(std::min(width_ratio, height_ratio));
if (max_ratio > real_ratio) {
QApplication::setHighDpiScaleFactorRoundingPolicy(
Qt::HighDpiScaleFactorRoundingPolicy::Round);
} else {
QApplication::setHighDpiScaleFactorRoundingPolicy(
Qt::HighDpiScaleFactorRoundingPolicy::Floor);
}
#else
// Other OSes should be better than Windows at fractional scaling.
QApplication::setHighDpiScaleFactorRoundingPolicy(
Qt::HighDpiScaleFactorRoundingPolicy::PassThrough);
#endif
QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
QApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
}
int main(int argc, char* argv[]) { int main(int argc, char* argv[]) {
Common::DetachedTasks detached_tasks; Common::DetachedTasks detached_tasks;
MicroProfileOnThreadCreate("Frontend"); MicroProfileOnThreadCreate("Frontend");
@ -2680,6 +2729,8 @@ int main(int argc, char* argv[]) {
format.setSwapBehavior(QSurfaceFormat::DefaultSwapBehavior); format.setSwapBehavior(QSurfaceFormat::DefaultSwapBehavior);
QSurfaceFormat::setDefaultFormat(format); QSurfaceFormat::setDefaultFormat(format);
SetHighDPIAttributes();
#ifdef __APPLE__ #ifdef __APPLE__
std::string bin_path = FileUtil::GetBundleDirectory() + DIR_SEP + ".."; std::string bin_path = FileUtil::GetBundleDirectory() + DIR_SEP + "..";
chdir(bin_path.c_str()); chdir(bin_path.c_str());