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https://github.com/yuzu-emu/yuzu.git
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QT Frontend: Migrate to QOpenGLWindow
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@ -12,6 +12,23 @@
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namespace Core::Frontend {
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/**
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* Represents a graphics context that can be used for background computation or drawing. If the
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* graphics backend doesn't require the context, then the implementation of these methods can be
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* stubs
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*/
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class GraphicsContext {
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public:
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/// Makes the graphics context current for the caller thread
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virtual void MakeCurrent() = 0;
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/// Releases (dunno if this is the "right" word) the context from the caller thread
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virtual void DoneCurrent() = 0;
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/// Swap buffers to display the next frame
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virtual void SwapBuffers() = 0;
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};
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/**
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* Abstraction class used to provide an interface between emulation code and the frontend
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* (e.g. SDL, QGLWidget, GLFW, etc...).
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@ -30,7 +47,7 @@ namespace Core::Frontend {
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* - DO NOT TREAT THIS CLASS AS A GUI TOOLKIT ABSTRACTION LAYER. That's not what it is. Please
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* re-read the upper points again and think about it if you don't see this.
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*/
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class EmuWindow {
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class EmuWindow : public GraphicsContext {
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public:
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/// Data structure to store emuwindow configuration
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struct WindowConfig {
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@ -40,17 +57,21 @@ public:
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std::pair<unsigned, unsigned> min_client_area_size;
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};
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/// Swap buffers to display the next frame
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virtual void SwapBuffers() = 0;
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/// Polls window events
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virtual void PollEvents() = 0;
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/// Makes the graphics context current for the caller thread
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virtual void MakeCurrent() = 0;
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/// Releases (dunno if this is the "right" word) the GLFW context from the caller thread
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virtual void DoneCurrent() = 0;
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/**
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* Returns a GraphicsContext that the frontend provides that is shared with the emu window. This
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* context can be used from other threads for background graphics computation. If the frontend
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* is using a graphics backend that doesn't need anything specific to run on a different thread,
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* then it can use a stubbed implemenation for GraphicsContext.
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*
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* If the return value is null, then the core should assume that the frontend cannot provide a
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* Shared Context
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*/
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virtual std::unique_ptr<GraphicsContext> CreateSharedContext() const {
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return nullptr;
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}
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/**
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* Signal that a touch pressed event has occurred (e.g. mouse click pressed)
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@ -1,6 +1,13 @@
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// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <QApplication>
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#include <QHBoxLayout>
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#include <QKeyEvent>
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#include <QOffscreenSurface>
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#include <QOpenGLWindow>
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#include <QPainter>
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#include <QScreen>
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#include <QWindow>
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#include <fmt/format.h>
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@ -73,13 +80,36 @@ void EmuThread::run() {
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render_window->moveContext();
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}
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class GGLContext : public Core::Frontend::GraphicsContext {
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public:
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explicit GGLContext(QOpenGLContext* shared_context) : surface() {
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context = std::make_unique<QOpenGLContext>(shared_context);
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surface.setFormat(shared_context->format());
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surface.create();
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}
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void MakeCurrent() override {
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context->makeCurrent(&surface);
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}
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void DoneCurrent() override {
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context->doneCurrent();
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}
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void SwapBuffers() override {}
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private:
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std::unique_ptr<QOpenGLContext> context;
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QOffscreenSurface surface;
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};
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// This class overrides paintEvent and resizeEvent to prevent the GUI thread from stealing GL
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// context.
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// The corresponding functionality is handled in EmuThread instead
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class GGLWidgetInternal : public QGLWidget {
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class GGLWidgetInternal : public QOpenGLWindow {
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public:
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GGLWidgetInternal(QGLFormat fmt, GRenderWindow* parent)
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: QGLWidget(fmt, parent), parent(parent) {}
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GGLWidgetInternal(GRenderWindow* parent, QOpenGLContext* shared_context)
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: QOpenGLWindow(shared_context), parent(parent) {}
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void paintEvent(QPaintEvent* ev) override {
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if (do_painting) {
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@ -105,7 +135,7 @@ private:
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};
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GRenderWindow::GRenderWindow(QWidget* parent, EmuThread* emu_thread)
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: QWidget(parent), child(nullptr), emu_thread(emu_thread) {
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: QWidget(parent), child(nullptr), context(nullptr), emu_thread(emu_thread) {
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setWindowTitle(QStringLiteral("yuzu %1 | %2-%3")
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.arg(Common::g_build_name, Common::g_scm_branch, Common::g_scm_desc));
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@ -129,19 +159,19 @@ void GRenderWindow::moveContext() {
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auto thread = (QThread::currentThread() == qApp->thread() && emu_thread != nullptr)
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? emu_thread
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: qApp->thread();
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child->context()->moveToThread(thread);
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context->moveToThread(thread);
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}
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void GRenderWindow::SwapBuffers() {
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// In our multi-threaded QGLWidget use case we shouldn't need to call `makeCurrent`,
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// In our multi-threaded QWidget use case we shouldn't need to call `makeCurrent`,
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// since we never call `doneCurrent` in this thread.
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// However:
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// - The Qt debug runtime prints a bogus warning on the console if `makeCurrent` wasn't called
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// since the last time `swapBuffers` was executed;
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// - On macOS, if `makeCurrent` isn't called explicitely, resizing the buffer breaks.
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child->makeCurrent();
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context->makeCurrent(child);
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child->swapBuffers();
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context->swapBuffers(child);
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if (!first_frame) {
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emit FirstFrameDisplayed();
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first_frame = true;
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@ -149,11 +179,11 @@ void GRenderWindow::SwapBuffers() {
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}
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void GRenderWindow::MakeCurrent() {
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child->makeCurrent();
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context->makeCurrent(child);
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}
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void GRenderWindow::DoneCurrent() {
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child->doneCurrent();
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context->doneCurrent();
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}
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void GRenderWindow::PollEvents() {}
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@ -173,7 +203,7 @@ void GRenderWindow::OnFramebufferSizeChanged() {
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}
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void GRenderWindow::BackupGeometry() {
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geometry = ((QGLWidget*)this)->saveGeometry();
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geometry = ((QWidget*)this)->saveGeometry();
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}
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void GRenderWindow::RestoreGeometry() {
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@ -191,7 +221,7 @@ QByteArray GRenderWindow::saveGeometry() {
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// If we are a top-level widget, store the current geometry
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// otherwise, store the last backup
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if (parent() == nullptr)
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return ((QGLWidget*)this)->saveGeometry();
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return ((QWidget*)this)->saveGeometry();
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else
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return geometry;
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}
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@ -305,7 +335,19 @@ void GRenderWindow::OnClientAreaResized(unsigned width, unsigned height) {
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NotifyClientAreaSizeChanged(std::make_pair(width, height));
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}
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std::unique_ptr<Core::Frontend::GraphicsContext> GRenderWindow::CreateSharedContext() const {
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return std::make_unique<GGLContext>(shared_context.get());
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}
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void GRenderWindow::InitRenderTarget() {
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if (shared_context) {
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shared_context.reset();
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}
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if (context) {
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context.reset();
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}
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if (child) {
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delete child;
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}
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@ -318,19 +360,28 @@ void GRenderWindow::InitRenderTarget() {
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// TODO: One of these flags might be interesting: WA_OpaquePaintEvent, WA_NoBackground,
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// WA_DontShowOnScreen, WA_DeleteOnClose
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QGLFormat fmt;
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QSurfaceFormat fmt;
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fmt.setVersion(4, 3);
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fmt.setProfile(QGLFormat::CoreProfile);
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fmt.setProfile(QSurfaceFormat::CoreProfile);
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// TODO: expose a setting for buffer value (ie default/single/double/triple)
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fmt.setSwapBehavior(QSurfaceFormat::DefaultSwapBehavior);
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shared_context = std::make_unique<QOpenGLContext>();
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shared_context->setFormat(fmt);
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shared_context->create();
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context = std::make_unique<QOpenGLContext>();
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context->setShareContext(shared_context.get());
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context->setFormat(fmt);
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context->create();
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fmt.setSwapInterval(false);
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// Requests a forward-compatible context, which is required to get a 3.2+ context on OS X
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fmt.setOption(QGL::NoDeprecatedFunctions);
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child = new GGLWidgetInternal(fmt, this);
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child = new GGLWidgetInternal(this, shared_context.get());
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QWidget* container = QWidget::createWindowContainer(child, this);
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QBoxLayout* layout = new QHBoxLayout(this);
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resize(Layout::ScreenUndocked::Width, Layout::ScreenUndocked::Height);
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layout->addWidget(child);
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child->resize(Layout::ScreenUndocked::Width, Layout::ScreenUndocked::Height);
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container->resize(Layout::ScreenUndocked::Width, Layout::ScreenUndocked::Height);
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layout->addWidget(container);
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layout->setMargin(0);
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setLayout(layout);
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@ -340,6 +391,8 @@ void GRenderWindow::InitRenderTarget() {
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NotifyClientAreaSizeChanged(std::pair<unsigned, unsigned>(child->width(), child->height()));
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BackupGeometry();
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// show causes the window to actually be created and the gl context as well
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show();
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}
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void GRenderWindow::CaptureScreenshot(u16 res_scale, const QString& screenshot_path) {
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@ -7,9 +7,9 @@
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#include <atomic>
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#include <condition_variable>
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#include <mutex>
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#include <QGLWidget>
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#include <QImage>
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#include <QThread>
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#include <QWidget>
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#include "common/thread.h"
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#include "core/core.h"
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#include "core/frontend/emu_window.h"
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@ -21,6 +21,8 @@ class QTouchEvent;
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class GGLWidgetInternal;
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class GMainWindow;
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class GRenderWindow;
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class QSurface;
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class QOpenGLContext;
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class EmuThread : public QThread {
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Q_OBJECT
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@ -115,6 +117,7 @@ public:
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void MakeCurrent() override;
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void DoneCurrent() override;
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void PollEvents() override;
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std::unique_ptr<Core::Frontend::GraphicsContext> CreateSharedContext() const override;
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void BackupGeometry();
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void RestoreGeometry();
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@ -168,6 +171,11 @@ private:
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QByteArray geometry;
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EmuThread* emu_thread;
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// Context that backs the GGLWidgetInternal (and will be used by core to render)
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std::unique_ptr<QOpenGLContext> context;
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// Context that will be shared between all newly created contexts. This should never be made
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// current
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std::unique_ptr<QOpenGLContext> shared_context;
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/// Temporary storage of the screenshot taken
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QImage screenshot_image;
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@ -2032,7 +2032,8 @@ int main(int argc, char* argv[]) {
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QCoreApplication::setOrganizationName("yuzu team");
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QCoreApplication::setApplicationName("yuzu");
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QApplication::setAttribute(Qt::AA_DontCheckOpenGLContextThreadAffinity);
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// Enables the core to make the qt created contexts current on std::threads
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QCoreApplication::setAttribute(Qt::AA_DontCheckOpenGLContextThreadAffinity);
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QApplication app(argc, argv);
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// Qt changes the locale and causes issues in float conversion using std::to_string() when
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