Allow choosing OpenGL / Raster in runtime.

CMakeLists.txt

@@ -57,6 +57,10 @@ PRIVATE
     ui/effects/ripple_animation.h
     ui/effects/slide_animation.cpp
     ui/effects/slide_animation.h
+    ui/gl/gl_detection.cpp
+    ui/gl/gl_detection.h
+    ui/gl/gl_surface.cpp
+    ui/gl/gl_surface.h
     ui/image/image_prepare.cpp
     ui/image/image_prepare.h
     ui/layers/box_content.cpp

ui/gl/gl_detection.cpp

@@ -0,0 +1,85 @@
+// This file is part of Desktop App Toolkit,
+// a set of libraries for developing nice desktop applications.
+//
+// For license and copyright information please follow this link:
+// https://github.com/desktop-app/legal/blob/master/LEGAL
+//
+#include "ui/gl/gl_detection.h"
+
+#include "base/debug_log.h"
+
+#include <QtGui/QWindow>
+#include <QtGui/QOpenGLContext>
+#include <QtGui/QOpenGLFunctions>
+#include <QtWidgets/QOpenGLWidget>
+
+#define LOG_ONCE(x) static auto logged = [&] { LOG(x); return true; };
+
+namespace Ui::GL {
+
+Capabilities CheckCapabilities(QWidget *widget) {
+	auto created = QOpenGLContext();
+	auto format = QSurfaceFormat();
+	format.setAlphaBufferSize(8);
+	if (widget) {
+		if (!widget->window()->windowHandle()) {
+			widget->window()->createWinId();
+		}
+		if (!widget->window()->windowHandle()) {
+			LOG(("OpenGL: Could not create window for widget."));
+			return {};
+		}
+		if (!widget->window()->windowHandle()->supportsOpenGL()) {
+			LOG_ONCE(("OpenGL: Not supported for window."));
+			return {};
+		}
+	} else {
+		created.setFormat(format);
+		if (!created.create()) {
+			LOG_ONCE(("OpenGL: Could not create context with alpha."));
+			return {};
+		}
+	}
+	auto tester = QOpenGLWidget(widget);
+	if (widget) {
+		tester.setFormat(format);
+		tester.grabFramebuffer(); // Force initialize().
+	}
+	const auto context = (widget ? tester.context() : &created);
+	if (!context) {
+		LOG_ONCE(("OpenGL: Could not create widget in a window."));
+		return {};
+	}
+	const auto functions = context->functions();
+	using Feature = QOpenGLFunctions;
+	if (!functions->hasOpenGLFeature(Feature::NPOTTextures)) {
+		LOG_ONCE(("OpenGL: NPOT textures not supported."));
+		return {};
+	} else if (!functions->hasOpenGLFeature(Feature::Framebuffers)) {
+		LOG_ONCE(("OpenGL: Framebuffers not supported."));
+		return {};
+	} else if (!functions->hasOpenGLFeature(Feature::Shaders)) {
+		LOG_ONCE(("OpenGL: Shaders not supported."));
+		return {};
+	}
+	const auto supported = context->format();
+	if (supported.profile() == QSurfaceFormat::NoProfile) {
+		LOG_ONCE(("OpenGL: NoProfile received in final format."));
+		return {};
+	}
+	const auto version = u"%1.%2"_q
+		.arg(supported.majorVersion())
+		.arg(supported.majorVersion());
+	auto result = Capabilities{ .supported = true };
+	if (supported.alphaBufferSize() >= 8) {
+		result.transparency = true;
+		LOG_ONCE(("OpenGL: QOpenGLContext created, version: %1."
+			).arg(version));
+	} else {
+		LOG_ONCE(("OpenGL: QOpenGLContext without alpha created, version: %1"
+			).arg(version));
+	}
+	return result;
+}
+
+} // namespace Ui::GL

ui/gl/gl_detection.h

@@ -0,0 +1,20 @@
+// This file is part of Desktop App Toolkit,
+// a set of libraries for developing nice desktop applications.
+//
+// For license and copyright information please follow this link:
+// https://github.com/desktop-app/legal/blob/master/LEGAL
+//
+#pragma once
+
+#include "base/flags.h"
+
+namespace Ui::GL {
+
+struct Capabilities {
+	bool supported = false;
+	bool transparency = false;
+};
+
+[[nodiscard]] Capabilities CheckCapabilities(QWidget *widget = nullptr);
+
+} // namespace Ui::GL

ui/gl/gl_surface.cpp

@@ -0,0 +1,103 @@
+// This file is part of Desktop App Toolkit,
+// a set of libraries for developing nice desktop applications.
+//
+// For license and copyright information please follow this link:
+// https://github.com/desktop-app/legal/blob/master/LEGAL
+//
+#include "ui/gl/gl_surface.h"
+
+#include "ui/rp_widget.h"
+
+#include <QtGui/QPainter>
+#include <QtGui/QtEvents>
+#include <QtGui/QOpenGLContext>
+#include <QtWidgets/QOpenGLWidget>
+
+namespace Ui::GL {
+namespace {
+
+struct SurfaceTraits : RpWidgetDefaultTraits {
+	static constexpr bool kSetZeroGeometry = false;
+};
+
+class SurfaceOpenGL final
+	: public RpWidgetBase<QOpenGLWidget, SurfaceTraits> {
+public:
+	SurfaceOpenGL(QWidget *parent, std::unique_ptr<Renderer> renderer);
+
+private:
+	void initializeGL() override;
+	void resizeGL(int w, int h) override;
+	void paintGL() override;
+
+	const std::unique_ptr<Renderer> _renderer;
+
+};
+
+class SurfaceRaster final : public RpWidgetBase<QWidget, SurfaceTraits> {
+public:
+	SurfaceRaster(QWidget *parent, std::unique_ptr<Renderer> renderer);
+
+private:
+	void paintEvent(QPaintEvent *e) override;
+
+	const std::unique_ptr<Renderer> _renderer;
+
+};
+
+SurfaceOpenGL::SurfaceOpenGL(
+	QWidget *parent,
+	std::unique_ptr<Renderer> renderer)
+: RpWidgetBase<QOpenGLWidget, SurfaceTraits>(parent)
+, _renderer(std::move(renderer)) {
+}
+
+void SurfaceOpenGL::initializeGL() {
+	_renderer->init(this, context()->functions());
+}
+
+void SurfaceOpenGL::resizeGL(int w, int h) {
+	_renderer->resize(this, context()->functions(), w, h);
+}
+
+void SurfaceOpenGL::paintGL() {
+	_renderer->paint(this, context()->functions());
+}
+
+SurfaceRaster::SurfaceRaster(
+	QWidget *parent,
+	std::unique_ptr<Renderer> renderer)
+: RpWidgetBase<QWidget, SurfaceTraits>(parent)
+, _renderer(std::move(renderer)) {
+}
+
+void SurfaceRaster::paintEvent(QPaintEvent *e) {
+	_renderer->paintFallback(QPainter(this), e->region(), Backend::Raster);
+}
+
+} // namespace
+
+void Renderer::paint(
+		not_null<QOpenGLWidget*> widget,
+		not_null<QOpenGLFunctions*> f) {
+	paintFallback(QPainter(widget.get()), widget->rect(), Backend::OpenGL);
+}
+
+std::unique_ptr<RpWidgetWrap> CreateSurface(
+		QWidget *parent,
+		Fn<ChosenRenderer(Capabilities)> chooseRenderer) {
+	auto chosen = chooseRenderer(CheckCapabilities(parent));
+	switch (chosen.backend) {
+	case Backend::OpenGL:
+		return std::make_unique<SurfaceOpenGL>(
+			parent,
+			std::move(chosen.renderer));
+	case Backend::Raster:
+		return std::make_unique<SurfaceRaster>(
+			parent,
+			std::move(chosen.renderer));
+	}
+	Unexpected("Backend value in Ui::GL::CreateSurface.");
+}
+
+} // namespace Ui::GL

ui/gl/gl_surface.h

@@ -0,0 +1,62 @@
+// This file is part of Desktop App Toolkit,
+// a set of libraries for developing nice desktop applications.
+//
+// For license and copyright information please follow this link:
+// https://github.com/desktop-app/legal/blob/master/LEGAL
+//
+#pragma once
+
+#include "ui/gl/gl_detection.h"
+
+class QPainter;
+class QOpenGLWidget;
+class QOpenGLFunctions;
+
+namespace Ui {
+class RpWidgetWrap;
+} // namespace Ui
+
+namespace Ui::GL {
+
+enum class Backend {
+    OpenGL,
+    Raster,
+};
+
+class Renderer {
+public:
+    virtual void init(
+        not_null<QOpenGLWidget*> widget,
+        not_null<QOpenGLFunctions*> f) {
+    }
+
+    virtual void resize(
+        not_null<QOpenGLWidget*> widget,
+        not_null<QOpenGLFunctions*> f,
+        int w,
+        int h) {
+    }
+
+    virtual void paint(
+        not_null<QOpenGLWidget*> widget,
+        not_null<QOpenGLFunctions*> f);
+
+    virtual void paintFallback(
+        QPainter &&p,
+        const QRegion &clip,
+        Backend backend) {
+    }
+
+    virtual ~Renderer() = default;
+};
+
+struct ChosenRenderer {
+    std::unique_ptr<Renderer> renderer;
+    Backend backend = Backend::Raster;
+};
+
+[[nodiscard]] std::unique_ptr<RpWidgetWrap> CreateSurface(
+    QWidget *parent,
+    Fn<ChosenRenderer(Capabilities)> chooseRenderer);
+
+} // namespace Ui::GL

ui/rp_widget.cpp

@@ -27,71 +27,71 @@ void ResizeFitChild(
 	}, child->lifetime());
 }
 
-rpl::producer<not_null<QEvent*>> RpWidgetMethods::events() const {
+rpl::producer<not_null<QEvent*>> RpWidgetWrap::events() const {
 	auto &stream = eventStreams().events;
 	return stream.events();
 }
 
-rpl::producer<QRect> RpWidgetMethods::geometryValue() const {
+rpl::producer<QRect> RpWidgetWrap::geometryValue() const {
 	auto &stream = eventStreams().geometry;
-	return stream.events_starting_with_copy(callGetGeometry());
+	return stream.events_starting_with_copy(rpWidget()->geometry());
 }
 
-rpl::producer<QSize> RpWidgetMethods::sizeValue() const {
+rpl::producer<QSize> RpWidgetWrap::sizeValue() const {
 	return geometryValue()
 		| rpl::map([](QRect &&value) { return value.size(); })
 		| rpl::distinct_until_changed();
 }
 
-rpl::producer<int> RpWidgetMethods::heightValue() const {
+rpl::producer<int> RpWidgetWrap::heightValue() const {
 	return geometryValue()
 		| rpl::map([](QRect &&value) { return value.height(); })
 		| rpl::distinct_until_changed();
 }
 
-rpl::producer<int> RpWidgetMethods::widthValue() const {
+rpl::producer<int> RpWidgetWrap::widthValue() const {
 	return geometryValue()
 		| rpl::map([](QRect &&value) { return value.width(); })
 		| rpl::distinct_until_changed();
 }
 
-rpl::producer<QPoint> RpWidgetMethods::positionValue() const {
+rpl::producer<QPoint> RpWidgetWrap::positionValue() const {
 	return geometryValue()
 		| rpl::map([](QRect &&value) { return value.topLeft(); })
 		| rpl::distinct_until_changed();
 }
 
-rpl::producer<int> RpWidgetMethods::leftValue() const {
+rpl::producer<int> RpWidgetWrap::leftValue() const {
 	return geometryValue()
 		| rpl::map([](QRect &&value) { return value.left(); })
 		| rpl::distinct_until_changed();
 }
 
-rpl::producer<int> RpWidgetMethods::topValue() const {
+rpl::producer<int> RpWidgetWrap::topValue() const {
 	return geometryValue()
 		| rpl::map([](QRect &&value) { return value.top(); })
 		| rpl::distinct_until_changed();
 }
 
-rpl::producer<int> RpWidgetMethods::desiredHeightValue() const {
+rpl::producer<int> RpWidgetWrap::desiredHeightValue() const {
 	return heightValue();
 }
 
-rpl::producer<bool> RpWidgetMethods::shownValue() const {
+rpl::producer<bool> RpWidgetWrap::shownValue() const {
 	auto &stream = eventStreams().shown;
-	return stream.events_starting_with(!callIsHidden());
+	return stream.events_starting_with(!rpWidget()->isHidden());
 }
 
-rpl::producer<QRect> RpWidgetMethods::paintRequest() const {
+rpl::producer<QRect> RpWidgetWrap::paintRequest() const {
 	return eventStreams().paint.events();
 }
 
-rpl::producer<> RpWidgetMethods::alive() const {
+rpl::producer<> RpWidgetWrap::alive() const {
 	return eventStreams().alive.events();
 }
 
-rpl::producer<> RpWidgetMethods::windowDeactivateEvents() const {
-	const auto window = callGetWidget()->window()->windowHandle();
+rpl::producer<> RpWidgetWrap::windowDeactivateEvents() const {
+	const auto window = rpWidget()->window()->windowHandle();
 	Assert(window != nullptr);
 
 	return base::qt_signal_producer(
@@ -102,7 +102,7 @@ rpl::producer<> RpWidgetMethods::windowDeactivateEvents() const {
 	});
 }
 
-rpl::producer<> RpWidgetMethods::macWindowDeactivateEvents() const {
+rpl::producer<> RpWidgetWrap::macWindowDeactivateEvents() const {
 #ifdef Q_OS_MAC
 	return windowDeactivateEvents();
 #else // Q_OS_MAC
@@ -110,20 +110,21 @@ rpl::producer<> RpWidgetMethods::macWindowDeactivateEvents() const {
 #endif // Q_OS_MAC
 }
 
-rpl::lifetime &RpWidgetMethods::lifetime() {
+rpl::lifetime &RpWidgetWrap::lifetime() {
 	return _lifetime;
 }
 
-bool RpWidgetMethods::handleEvent(QEvent *event) {
+bool RpWidgetWrap::handleEvent(QEvent *event) {
 	Expects(event != nullptr);
 
 	auto streams = _eventStreams.get();
 	if (!streams) {
 		return eventHook(event);
 	}
-	auto that = QPointer<QObject>();
-	if (streams->events.has_consumers()) {
-		that = callCreateWeak();
+	auto that = QPointer<QWidget>();
+	const auto allAreObserved = streams->events.has_consumers();
+	if (allAreObserved) {
+		that = rpWidget();
 		streams->events.fire_copy(event);
 		if (!that) {
 			return true;
@@ -133,10 +134,10 @@ bool RpWidgetMethods::handleEvent(QEvent *event) {
 	case QEvent::Move:
 	case QEvent::Resize:
 		if (streams->geometry.has_consumers()) {
-			if (!that) {
-				that = callCreateWeak();
+			if (!allAreObserved) {
+				that = rpWidget();
 			}
-			streams->geometry.fire_copy(callGetGeometry());
+			streams->geometry.fire_copy(rpWidget()->geometry());
 			if (!that) {
 				return true;
 			}
@@ -145,8 +146,8 @@ bool RpWidgetMethods::handleEvent(QEvent *event) {
 
 	case QEvent::Paint:
 		if (streams->paint.has_consumers()) {
-			if (!that) {
-				that = callCreateWeak();
+			if (!allAreObserved) {
+				that = rpWidget();
 			}
 			const auto rect = static_cast<QPaintEvent*>(event)->rect();
 			streams->paint.fire_copy(rect);
@@ -160,13 +161,13 @@ bool RpWidgetMethods::handleEvent(QEvent *event) {
 	return eventHook(event);
 }
 
-RpWidgetMethods::Initer::Initer(QWidget *parent, bool setZeroGeometry) {
+RpWidgetWrap::Initer::Initer(QWidget *parent, bool setZeroGeometry) {
 	if (setZeroGeometry) {
 		parent->setGeometry(0, 0, 0, 0);
 	}
 }
 
-void RpWidgetMethods::visibilityChangedHook(bool wasVisible, bool nowVisible) {
+void RpWidgetWrap::visibilityChangedHook(bool wasVisible, bool nowVisible) {
 	if (nowVisible != wasVisible) {
 		if (auto streams = _eventStreams.get()) {
 			streams->shown.fire_copy(nowVisible);
@@ -174,7 +175,7 @@ void RpWidgetMethods::visibilityChangedHook(bool wasVisible, bool nowVisible) {
 	}
 }
 
-auto RpWidgetMethods::eventStreams() const -> EventStreams& {
+auto RpWidgetWrap::eventStreams() const -> EventStreams& {
 	if (!_eventStreams) {
 		_eventStreams = std::make_unique<EventStreams>();
 	}

ui/rp_widget.h

@@ -244,10 +244,13 @@ using RpWidgetParent = std::conditional_t<
 	TWidgetHelper<Widget>>;
 
 template <typename Widget, typename Traits>
-class RpWidgetWrap;
+class RpWidgetBase;
 
-class RpWidgetMethods {
+class RpWidgetWrap {
 public:
+	virtual QWidget *rpWidget() = 0;
+	virtual const QWidget *rpWidget() const = 0;
+
 	rpl::producer<not_null<QEvent*>> events() const;
 	rpl::producer<QRect> geometryValue() const;
 	rpl::producer<QSize> sizeValue() const;
@@ -274,7 +277,7 @@ public:
 
 	rpl::lifetime &lifetime();
 
-	virtual ~RpWidgetMethods() = default;
+	virtual ~RpWidgetWrap() = default;
 
 protected:
 	bool handleEvent(QEvent *event);
@@ -282,7 +285,7 @@ protected:
 
 private:
 	template <typename Widget, typename Traits>
-	friend class RpWidgetWrap;
+	friend class RpWidgetBase;
 
 	struct EventStreams {
 		rpl::event_stream<not_null<QEvent*>> events;
@@ -296,11 +299,6 @@ private:
 	};
 
 	virtual void callSetVisible(bool visible) = 0;
-	virtual QWidget *callGetWidget() = 0;
-	virtual const QWidget *callGetWidget() const = 0;
-	virtual QPointer<QObject> callCreateWeak() = 0;
-	virtual QRect callGetGeometry() const = 0;
-	virtual bool callIsHidden() const = 0;
 
 	void visibilityChangedHook(bool wasVisible, bool nowVisible);
 	EventStreams &eventStreams() const;
@@ -315,22 +313,28 @@ struct RpWidgetDefaultTraits {
 };
 
 template <typename Widget, typename Traits = RpWidgetDefaultTraits>
-class RpWidgetWrap
+class RpWidgetBase
 	: public RpWidgetParent<Widget>
-	, public RpWidgetMethods {
-	using Self = RpWidgetWrap<Widget, Traits>;
+	, public RpWidgetWrap {
+	using Self = RpWidgetBase<Widget, Traits>;
 	using Parent = RpWidgetParent<Widget>;
 
 public:
 	using Parent::Parent;
 
+	QWidget *rpWidget() final override {
+		return this;
+	}
+	const QWidget *rpWidget() const final override {
+		return this;
+	}
 	void setVisible(bool visible) final override {
 		auto wasVisible = !this->isHidden();
 		setVisibleHook(visible);
 		visibilityChangedHook(wasVisible, !this->isHidden());
 	}
 
-	~RpWidgetWrap() {
+	~RpWidgetBase() {
 		base::take(_lifetime);
 		base::take(_eventStreams);
 	}
@@ -347,32 +351,17 @@ protected:
 	}
 
 private:
-	void callSetVisible(bool visible) override {
-		Self::setVisible(visible);
-	}
-	QWidget *callGetWidget() override {
-		return this;
-	}
-	const QWidget *callGetWidget() const override {
-		return this;
-	}
-	QPointer<QObject> callCreateWeak() override {
-		return QPointer<QObject>((QObject*)this);
-	}
-	QRect callGetGeometry() const override {
-		return this->geometry();
-	}
-	bool callIsHidden() const override {
-		return this->isHidden();
+	void callSetVisible(bool visible) final override {
+		Self::setVisible(visible); // Save one virtual method invocation.
 	}
 
 	Initer _initer = { this, Traits::kSetZeroGeometry };
 
 };
 
-class RpWidget : public RpWidgetWrap<QWidget> {
+class RpWidget : public RpWidgetBase<QWidget> {
 public:
-	using RpWidgetWrap<QWidget>::RpWidgetWrap;
+	using RpWidgetBase<QWidget>::RpWidgetBase;
 
 };
 

ui/widgets/input_fields.cpp

@@ -910,7 +910,7 @@ FlatInput::FlatInput(
 	const style::FlatInput &st,
 	rpl::producer<QString> placeholder,
 	const QString &v)
-: RpWidgetWrap<QLineEdit>(v, parent)
+: Parent(v, parent)
 , _oldtext(v)
 , _placeholderFull(std::move(placeholder))
 , _placeholderVisible(!v.length())

ui/widgets/input_fields.h

@@ -54,11 +54,11 @@ enum class InputSubmitSettings {
 	None,
 };
 
-class FlatInput : public RpWidgetWrap<QLineEdit> {
+class FlatInput : public RpWidgetBase<QLineEdit> {
 	// The Q_OBJECT meta info is used for qobject_cast!
 	Q_OBJECT
 
-	using Parent = RpWidgetWrap<QLineEdit>;
+	using Parent = RpWidgetBase<QLineEdit>;
 public:
 	FlatInput(
 		QWidget *parent,
@@ -545,11 +545,11 @@ private:
 
 };
 
-class MaskedInputField : public RpWidgetWrap<QLineEdit> {
+class MaskedInputField : public RpWidgetBase<QLineEdit> {
 	// The Q_OBJECT meta info is used for qobject_cast!
 	Q_OBJECT
 
-	using Parent = RpWidgetWrap<QLineEdit>;
+	using Parent = RpWidgetBase<QLineEdit>;
 public:
 	MaskedInputField(
 		QWidget *parent,

ui/widgets/scroll_area.cpp

@@ -272,7 +272,7 @@ void ScrollBar::resizeEvent(QResizeEvent *e) {
 }
 
 ScrollArea::ScrollArea(QWidget *parent, const style::ScrollArea &st, bool handleTouch)
-: RpWidgetWrap<QScrollArea>(parent)
+: Parent(parent)
 , _st(st)
 , _horizontalBar(this, false, &_st)
 , _verticalBar(this, true, &_st)

ui/widgets/scroll_area.h

@@ -125,9 +125,10 @@ private:
 	QRect _bar;
 };
 
-class ScrollArea : public RpWidgetWrap<QScrollArea> {
+class ScrollArea : public RpWidgetBase<QScrollArea> {
 	Q_OBJECT
 
+	using Parent = RpWidgetBase<QScrollArea>;
 public:
 	ScrollArea(QWidget *parent, const style::ScrollArea &st = st::defaultScrollArea, bool handleTouch = true);