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Enable highdpi downscale when rhiConfig evaluates to GL

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This commit is contained in:
Ilya Fedin 2023-11-19 01:39:24 +04:00 • committed by John Preston
parent b1d5c7c116
commit 16772f440f
1 changed files with 21 additions and 7 deletions
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28
ui/rp_widget.cpp
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@ -21,6 +21,20 @@
class TWidgetPrivate : public QWidgetPrivate {
public:
#if QT_VERSION >= QT_VERSION_CHECK(6, 4, 0)
TWidgetPrivate(int version = QObjectPrivateVersion)
: QWidgetPrivate(version) {
[[maybe_unused]] static const auto Once = [] {
if (::Platform::IsWayland()
&& Ui::GL::ChooseBackendDefault(
Ui::GL::CheckCapabilities(nullptr, true))
== Ui::GL::Backend::OpenGL) {
qApp->setProperty("_q_widgets_highdpi_downscale", true);
WaylandGL = true;
}
return true;
}();
}
QPlatformBackingStoreRhiConfig rhiConfig() const override {
const auto q = static_cast<TWidget*>(q_ptr);
if (!q->testAttribute(Qt::WA_WState_Created)
@ -31,20 +45,20 @@ public:
if (const auto config = q->rhiConfig()) {
return *config;
}
// We can't specify the widget here as q_evaluateRhiConfig is called
// in QWidgetWindow constructor, while windowHandle is set right after
// the constructor is completed
if (::Platform::IsWayland() // old versions of mutter produce flicker without OpenGL
&& Ui::GL::ChooseBackendDefault(
Ui::GL::CheckCapabilities(nullptr))
== Ui::GL::Backend::OpenGL) {
// fix flickering on GNOME
if (WaylandGL) {
return { QPlatformBackingStoreRhiConfig::OpenGL };
}
return QWidgetPrivate::rhiConfig();
}
#endif // Qt >= 6.4.0
private:
static bool WaylandGL;
};
bool TWidgetPrivate::WaylandGL = false;
TWidget::TWidget(QWidget *parent)
: TWidgetHelper<QWidget>(*(new TWidgetPrivate), parent, {}) {
[[maybe_unused]] static const auto Once = [] {