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Diffstat (limited to 'tests/manual/graphicsframecapture/main.cpp')
-rw-r--r-- | tests/manual/graphicsframecapture/main.cpp | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/tests/manual/graphicsframecapture/main.cpp b/tests/manual/graphicsframecapture/main.cpp new file mode 100644 index 0000000000..b13f2f4184 --- /dev/null +++ b/tests/manual/graphicsframecapture/main.cpp @@ -0,0 +1,128 @@ +// Copyright (C) 2023 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only + +// This is a compact, minimal demo of deciding the backend at runtime while +// using the exact same shaders and rendering code without any branching +// whatsoever once the QWindow is up and the RHI is initialized. + +#include <QGuiApplication> +#include <QCommandLineParser> +#include "examplewindow.h" + + +QString graphicsApiName(QRhi::Implementation graphicsApi); +QRhi::Implementation graphicsApiFromCmd(const QGuiApplication &app); + +int main(int argc, char **argv) +{ + QGuiApplication app(argc, argv); + QRhi::Implementation graphicsApi = graphicsApiFromCmd(app); + + QSurfaceFormat fmt; + fmt.setDepthBufferSize(24); + fmt.setStencilBufferSize(8); + QSurfaceFormat::setDefaultFormat(fmt); + + ExampleWindow w(graphicsApi); + +#if QT_CONFIG(vulkan) + QVulkanInstance inst; + if (graphicsApi == QRhi::Vulkan) { + inst.setLayers({ "VK_LAYER_KHRONOS_validation" }); + inst.setExtensions(QRhiVulkanInitParams::preferredInstanceExtensions()); + if (!inst.create()) { + qWarning("Failed to create Vulkan instance, switching to OpenGL"); + graphicsApi = QRhi::OpenGLES2; + } + } +#endif + +#if QT_CONFIG(vulkan) + if (graphicsApi == QRhi::Vulkan) + w.setVulkanInstance(&inst); +#endif + w.resize(1280, 720); + w.setTitle(QCoreApplication::applicationName() + QLatin1String(" - ") + graphicsApiName(graphicsApi)); + w.show(); + + int ret = app.exec(); + + // Window::event() will not get invoked when the + // PlatformSurfaceAboutToBeDestroyed event is sent during the QWindow + // destruction. That happens only when exiting via app::quit() instead of + // the more common QWindow::close(). Take care of it: if the QPlatformWindow + // is still around (there was no close() yet), get rid of the swapchain + // while it's not too late. + if (w.handle()) + w.releaseSwapChain(); + + return ret; +} + +QString graphicsApiName(QRhi::Implementation graphicsApi) +{ + switch (graphicsApi) { + case QRhi::Null: + return QLatin1String("Null (no output)"); + case QRhi::OpenGLES2: + return QLatin1String("OpenGL 2.x"); + case QRhi::Vulkan: + return QLatin1String("Vulkan"); + case QRhi::D3D11: + return QLatin1String("Direct3D 11"); + case QRhi::D3D12: + return QLatin1String("Direct3D 12"); + case QRhi::Metal: + return QLatin1String("Metal"); + default: + break; + } + return QString(); +} + +QRhi::Implementation graphicsApiFromCmd(const QGuiApplication &app) { + QRhi::Implementation graphicsApi; +#if defined(Q_OS_WIN) + graphicsApi = QRhi::D3D11; +#elif QT_CONFIG(metal) + graphicsApi = QRhi::Metal; +#elif QT_CONFIG(vulkan) + graphicsApi = QRhi::Vulkan; +#else + graphicsApi = QRhi::OpenGLES2; +#endif + + QCommandLineParser cmdLineParser; + cmdLineParser.addHelpOption(); + QCommandLineOption nullOption({ "n", "null" }, QLatin1String("Null")); + cmdLineParser.addOption(nullOption); + QCommandLineOption glOption({ "g", "opengl" }, QLatin1String("OpenGL (2.x)")); + cmdLineParser.addOption(glOption); + QCommandLineOption vkOption({ "v", "vulkan" }, QLatin1String("Vulkan")); + cmdLineParser.addOption(vkOption); + QCommandLineOption d3d11Option({ "d", "d3d11" }, QLatin1String("Direct3D 11")); + cmdLineParser.addOption(d3d11Option); + QCommandLineOption d3d12Option({ "D", "d3d12" }, QLatin1String("Direct3D 12")); + cmdLineParser.addOption(d3d12Option); + QCommandLineOption mtlOption({ "m", "metal" }, QLatin1String("Metal")); + cmdLineParser.addOption(mtlOption); + + cmdLineParser.process(app); + if (cmdLineParser.isSet(nullOption)) + graphicsApi = QRhi::Null; + if (cmdLineParser.isSet(glOption)) + graphicsApi = QRhi::OpenGLES2; + if (cmdLineParser.isSet(vkOption)) + graphicsApi = QRhi::Vulkan; + if (cmdLineParser.isSet(d3d11Option)) + graphicsApi = QRhi::D3D11; + if (cmdLineParser.isSet(d3d12Option)) + graphicsApi = QRhi::D3D12; + if (cmdLineParser.isSet(mtlOption)) + graphicsApi = QRhi::Metal; + + qDebug("Selected graphics API is %s", qPrintable(graphicsApiName(graphicsApi))); + qDebug("This is a multi-api example, use command line arguments to override:\n%s", qPrintable(cmdLineParser.helpText())); + + return graphicsApi; +} |