For surface with parent backend should be fixed.

Telegram/SourceFiles/calls/calls_panel.cpp

@@ -56,7 +56,8 @@ class Panel::Incoming final {
 public:
 	Incoming(
 		not_null<QWidget*> parent,
-		not_null<Webrtc::VideoTrack*> track);
+		not_null<Webrtc::VideoTrack*> track,
+		Ui::GL::Backend backend);
 
 	[[nodiscard]] not_null<QWidget*> widget() const;
 	[[nodiscard]] not_null<Ui::RpWidgetWrap* > rp() const;
@@ -69,7 +70,7 @@ private:
 	void fillBottomShadow(QPainter &p);
 
 	[[nodiscard]] Ui::GL::ChosenRenderer chooseRenderer(
-		Ui::GL::Capabilities capabilities);
+		Ui::GL::Backend backend);
 
 	const std::unique_ptr<Ui::RpWidgetWrap> _surface;
 	const not_null<Webrtc::VideoTrack*> _track;
@@ -79,12 +80,9 @@ private:
 
 Panel::Incoming::Incoming(
 	not_null<QWidget*> parent,
-	not_null<Webrtc::VideoTrack*> track)
-: _surface(Ui::GL::CreateSurface(
-	parent,
-	[=](Ui::GL::Capabilities capabilities) {
-		return chooseRenderer(capabilities);
-	}))
+	not_null<Webrtc::VideoTrack*> track,
+	Ui::GL::Backend backend)
+: _surface(Ui::GL::CreateSurface(parent, chooseRenderer(backend)))
 , _track(track) {
 	initBottomShadow();
 	widget()->setAttribute(Qt::WA_OpaquePaintEvent);
@@ -100,7 +98,7 @@ not_null<Ui::RpWidgetWrap*> Panel::Incoming::rp() const {
 }
 
 Ui::GL::ChosenRenderer Panel::Incoming::chooseRenderer(
-		Ui::GL::Capabilities capabilities) {
+		Ui::GL::Backend backend) {
 	class Renderer : public Ui::GL::Renderer {
 	public:
 		Renderer(not_null<Panel::Incoming*> owner) : _owner(owner) {
@@ -121,15 +119,9 @@ Ui::GL::ChosenRenderer Panel::Incoming::chooseRenderer(
 
 	};
 
-	const auto use = Platform::IsMac()
-		? true
-		: Platform::IsWindows()
-		? capabilities.supported
-		: capabilities.transparency;
-	LOG(("OpenGL: %1 (Incoming)").arg(Logs::b(use)));
 	return {
 		.renderer = std::make_unique<Renderer>(this),
-		.backend = (use ? Ui::GL::Backend::OpenGL : Ui::GL::Backend::Raster),
+		.backend = backend,
 	};
 }
 
@@ -258,6 +250,25 @@ Panel::Panel(not_null<Call*> call)
 
 Panel::~Panel() = default;
 
+std::unique_ptr<Ui::Window> Panel::createWindow() {
+	auto result = std::make_unique<Ui::Window>();
+	const auto capabilities = Ui::GL::CheckCapabilities(result.get());
+	const auto use = Platform::IsMac()
+		? true
+		: Platform::IsWindows()
+		? capabilities.supported
+		: capabilities.transparency;
+	LOG(("OpenGL: %1 (Incoming)").arg(Logs::b(use)));
+	_backend = use ? Ui::GL::Backend::OpenGL : Ui::GL::Backend::Raster;
+
+	if (use) {
+		return result;
+	}
+
+	// We have to create a new window, if OpenGL initialization failed.
+	return std::make_unique<Ui::Window>();
+}
+
 bool Panel::isActive() const {
 	return _window->isActiveWindow()
 		&& _window->isVisible()
@@ -491,7 +502,8 @@ void Panel::reinitWithCall(Call *call) {
 		_call->videoOutgoing());
 	_incoming = std::make_unique<Incoming>(
 		widget(),
-		_call->videoIncoming());
+		_call->videoIncoming(),
+		_backend);
 	_incoming->widget()->hide();
 
 	_call->mutedValue(

Telegram/SourceFiles/calls/calls_panel.h

@@ -30,6 +30,9 @@ class FadeWrap;
 template <typename Widget>
 class PaddingWrap;
 class Window;
+namespace GL {
+enum class Backend;
+} // namespace GL
 namespace Platform {
 class TitleControls;
 } // namespace Platform
@@ -67,6 +70,7 @@ private:
 		Redial,
 	};
 
+	std::unique_ptr<Ui::Window> createWindow();
 	[[nodiscard]] not_null<Ui::RpWidget*> widget() const;
 
 	void paint(QRect clip);
@@ -80,9 +84,6 @@ private:
 
 	void handleClose();
 
-	QRect signalBarsRect() const;
-	void paintSignalBarsBg(Painter &p);
-
 	void updateControlsGeometry();
 	void updateHangupGeometry();
 	void updateStatusGeometry();
@@ -105,6 +106,7 @@ private:
 	Call *_call = nullptr;
 	not_null<UserData*> _user;
 
+	Ui::GL::Backend _backend = Ui::GL::Backend();
 	const std::unique_ptr<Ui::Window> _window;
 	std::unique_ptr<Incoming> _incoming;
 

Telegram/SourceFiles/calls/group/calls_group_members.cpp

@@ -1461,7 +1461,8 @@ std::unique_ptr<Row> Members::Controller::createInvitedRow(
 Members::Members(
 	not_null<QWidget*> parent,
 	not_null<GroupCall*> call,
-	PanelMode mode)
+	PanelMode mode,
+	Ui::GL::Backend backend)
 : RpWidget(parent)
 , _call(call)
 , _mode(mode)
@@ -1473,7 +1474,8 @@ Members::Members(
 , _viewport(
 	std::make_unique<Viewport>(
 		_videoWrap.get(),
-		PanelMode::Default)) {
+		PanelMode::Default,
+		backend)) {
 	setupList();
 	setupAddMember(call);
 	setContent(_list);

Telegram/SourceFiles/calls/group/calls_group_members.h

@@ -14,6 +14,9 @@ class RpWidget;
 class ScrollArea;
 class VerticalLayout;
 class SettingsButton;
+namespace GL {
+enum class Backend;
+} // namespace GL
 } // namespace Ui
 
 namespace Data {
@@ -39,7 +42,8 @@ public:
 	Members(
 		not_null<QWidget*> parent,
 		not_null<GroupCall*> call,
-		PanelMode mode);
+		PanelMode mode,
+		Ui::GL::Backend backend);
 	~Members();
 
 	[[nodiscard]] not_null<Viewport*> viewport() const;

Telegram/SourceFiles/calls/group/calls_group_panel.cpp

@@ -26,6 +26,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "ui/widgets/dropdown_menu.h"
 #include "ui/widgets/input_fields.h"
 #include "ui/widgets/tooltip.h"
+#include "ui/gl/gl_detection.h"
 #include "ui/chat/group_call_bar.h"
 #include "ui/layers/layer_manager.h"
 #include "ui/layers/generic_box.h"
@@ -46,6 +47,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "main/main_session.h"
 #include "base/event_filter.h"
 #include "base/unixtime.h"
+#include "base/platform/base_platform_info.h"
 #include "base/qt_signal_producer.h"
 #include "base/timer_rpl.h"
 #include "app.h"
@@ -85,14 +87,14 @@ struct Panel::ControlsBackgroundNarrow {
 Panel::Panel(not_null<GroupCall*> call)
 : _call(call)
 , _peer(call->peer())
-, _window(std::make_unique<Ui::Window>())
+, _window(createWindow())
 , _layerBg(std::make_unique<Ui::LayerManager>(_window->body()))
 #ifndef Q_OS_MAC
 , _controls(std::make_unique<Ui::Platform::TitleControls>(
 	_window->body(),
 	st::groupCallTitle))
 #endif // !Q_OS_MAC
-, _viewport(std::make_unique<Viewport>(widget(), PanelMode::Wide))
+, _viewport(std::make_unique<Viewport>(widget(), PanelMode::Wide, _backend))
 , _mute(std::make_unique<Ui::CallMuteButton>(
 	widget(),
 	st::callMuteButton,
@@ -137,6 +139,25 @@ Panel::~Panel() {
 	_viewport = nullptr;
 }
 
+std::unique_ptr<Ui::Window> Panel::createWindow() {
+	auto result = std::make_unique<Ui::Window>();
+	const auto capabilities = Ui::GL::CheckCapabilities(result.get());
+	const auto use = Platform::IsMac()
+		? true
+		: Platform::IsWindows()
+		? capabilities.supported
+		: capabilities.transparency;
+	LOG(("OpenGL: %1 (Calls::Group::Viewport)").arg(Logs::b(use)));
+	_backend = use ? Ui::GL::Backend::OpenGL : Ui::GL::Backend::Raster;
+
+	if (use) {
+		return result;
+	}
+
+	// We have to create a new window, if OpenGL initialization failed.
+	return std::make_unique<Ui::Window>();
+}
+
 void Panel::setupRealCallViewers() {
 	_call->real(
 	) | rpl::start_with_next([=](not_null<Data::GroupCall*> real) {
@@ -679,7 +700,7 @@ void Panel::setupMembers() {
 	_countdown.destroy();
 	_startsWhen.destroy();
 
-	_members.create(widget(), _call, mode());
+	_members.create(widget(), _call, mode(), _backend);
 
 	setupVideo(_viewport.get());
 	setupVideo(_members->viewport());

Telegram/SourceFiles/calls/group/calls_group_panel.h

@@ -42,6 +42,9 @@ class ScrollArea;
 class GenericBox;
 class LayerManager;
 class GroupCallScheduledLeft;
+namespace GL {
+enum class Backend;
+} // namespace GL
 namespace Toast {
 class Instance;
 } // namespace Toast
@@ -81,6 +84,7 @@ private:
 	using State = GroupCall::State;
 	struct ControlsBackgroundNarrow;
 
+	std::unique_ptr<Ui::Window> createWindow();
 	[[nodiscard]] not_null<Ui::RpWidget*> widget() const;
 
 	[[nodiscard]] PanelMode mode() const;
@@ -151,6 +155,7 @@ private:
 	const not_null<GroupCall*> _call;
 	not_null<PeerData*> _peer;
 
+	Ui::GL::Backend _backend = Ui::GL::Backend();
 	const std::unique_ptr<Ui::Window> _window;
 	const std::unique_ptr<Ui::LayerManager> _layerBg;
 	rpl::variable<PanelMode> _mode;

Telegram/SourceFiles/calls/group/calls_group_viewport.cpp

@@ -47,13 +47,12 @@ namespace {
 
 } // namespace
 
-Viewport::Viewport(not_null<QWidget*> parent, PanelMode mode)
+Viewport::Viewport(
+	not_null<QWidget*> parent,
+	PanelMode mode,
+	Ui::GL::Backend backend)
 : _mode(mode)
-, _content(Ui::GL::CreateSurface(
-	parent,
-	[=](Ui::GL::Capabilities capabilities) {
-		return chooseRenderer(capabilities);
-	})) {
+, _content(Ui::GL::CreateSurface(parent, chooseRenderer(backend))) {
 	setup();
 }
 
@@ -796,25 +795,14 @@ void Viewport::setPressed(Selection value) {
 	_pressed = value;
 }
 
-Ui::GL::ChosenRenderer Viewport::chooseRenderer(
-		Ui::GL::Capabilities capabilities) {
-	const auto use = Platform::IsMac()
-		? true
-		: Platform::IsWindows()
-		? capabilities.supported
-		: capabilities.transparency;
-	LOG(("OpenGL: %1 (Calls::Group::Viewport)").arg(Logs::b(use)));
-	if (use) {
-		auto renderer = std::make_unique<RendererGL>(this);
-		_opengl = true;
-		return {
-			.renderer = std::move(renderer),
-			.backend = Ui::GL::Backend::OpenGL,
-		};
-	}
+Ui::GL::ChosenRenderer Viewport::chooseRenderer(Ui::GL::Backend backend) {
+	_opengl = (backend == Ui::GL::Backend::OpenGL);
 	return {
-		.renderer = std::make_unique<RendererSW>(this),
-		.backend = Ui::GL::Backend::Raster,
+		.renderer = (_opengl
+			? std::unique_ptr<Ui::GL::Renderer>(
+				std::make_unique<RendererGL>(this))
+			: std::make_unique<RendererSW>(this)),
+		.backend = backend,
 	};
 }
 

Telegram/SourceFiles/calls/group/calls_group_viewport.h

@@ -14,6 +14,7 @@ namespace Ui {
 class AbstractButton;
 class RpWidgetWrap;
 namespace GL {
+enum class Backend;
 struct Capabilities;
 struct ChosenRenderer;
 } // namespace GL
@@ -58,7 +59,10 @@ struct VideoTileTrack {
 
 class Viewport final {
 public:
-	Viewport(not_null<QWidget*> parent, PanelMode mode);
+	Viewport(
+		not_null<QWidget*> parent,
+		PanelMode mode,
+		Ui::GL::Backend backend);
 	~Viewport();
 
 	[[nodiscard]] not_null<QWidget*> widget() const;
@@ -159,7 +163,7 @@ private:
 	void updateSelected();
 
 	[[nodiscard]] Ui::GL::ChosenRenderer chooseRenderer(
-		Ui::GL::Capabilities capabilities);
+		Ui::GL::Backend backend);
 
 	PanelMode _mode = PanelMode();
 	bool _opengl = false;

Telegram/SourceFiles/media/view/media_view_overlay_widget.cpp

@@ -289,7 +289,6 @@ OverlayWidget::PipWrap::PipWrap(
 
 OverlayWidget::OverlayWidget()
 : _surface(Ui::GL::CreateSurface(
-	nullptr, // No parent for the window in Qt parent-child sense.
 	[=](Ui::GL::Capabilities capabilities) {
 		return chooseRenderer(capabilities);
 	}))

Telegram/SourceFiles/media/view/media_view_pip.cpp

@@ -375,7 +375,6 @@ PipPanel::PipPanel(
 	QWidget *parent,
 	Fn<void(QPainter&, FrameRequest, bool)> paint)
 : _content(Ui::GL::CreateSurface(
-	nullptr, // No parent for the window in Qt parent-child sense.
 	[=](Ui::GL::Capabilities capabilities) {
 		return chooseRenderer(capabilities);
 	}))

Telegram/lib_ui

@@ -1 +1 @@
-Subproject commit cbb65009ffc443bc88137f2758228c1b185d8d20
+Subproject commit 7bc9e1261498af07475f4bac0d8bcd8721202177