171 lines
6.4 KiB
C++
171 lines
6.4 KiB
C++
|
/****************************************************************************
|
||
|
**
|
||
|
** Copyright (C) 2020 The Qt Company Ltd.
|
||
|
** Contact: https://www.qt.io/licensing/
|
||
|
**
|
||
|
** This file is part of the examples of the Qt Toolkit.
|
||
|
**
|
||
|
** $QT_BEGIN_LICENSE:BSD$
|
||
|
** Commercial License Usage
|
||
|
** Licensees holding valid commercial Qt licenses may use this file in
|
||
|
** accordance with the commercial license agreement provided with the
|
||
|
** Software or, alternatively, in accordance with the terms contained in
|
||
|
** a written agreement between you and The Qt Company. For licensing terms
|
||
|
** and conditions see https://www.qt.io/terms-conditions. For further
|
||
|
** information use the contact form at https://www.qt.io/contact-us.
|
||
|
**
|
||
|
** BSD License Usage
|
||
|
** Alternatively, you may use this file under the terms of the BSD license
|
||
|
** as follows:
|
||
|
**
|
||
|
** "Redistribution and use in source and binary forms, with or without
|
||
|
** modification, are permitted provided that the following conditions are
|
||
|
** met:
|
||
|
** * Redistributions of source code must retain the above copyright
|
||
|
** notice, this list of conditions and the following disclaimer.
|
||
|
** * Redistributions in binary form must reproduce the above copyright
|
||
|
** notice, this list of conditions and the following disclaimer in
|
||
|
** the documentation and/or other materials provided with the
|
||
|
** distribution.
|
||
|
** * Neither the name of The Qt Company Ltd nor the names of its
|
||
|
** contributors may be used to endorse or promote products derived
|
||
|
** from this software without specific prior written permission.
|
||
|
**
|
||
|
**
|
||
|
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||
|
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||
|
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||
|
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||
|
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||
|
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||
|
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||
|
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||
|
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||
|
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
|
||
|
**
|
||
|
** $QT_END_LICENSE$
|
||
|
**
|
||
|
****************************************************************************/
|
||
|
|
||
|
// 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 "hellowindow.h"
|
||
|
|
||
|
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::Metal:
|
||
|
return QLatin1String("Metal");
|
||
|
default:
|
||
|
break;
|
||
|
}
|
||
|
return QString();
|
||
|
}
|
||
|
|
||
|
int main(int argc, char **argv)
|
||
|
{
|
||
|
QGuiApplication app(argc, argv);
|
||
|
|
||
|
QRhi::Implementation graphicsApi;
|
||
|
#if defined(Q_OS_WIN)
|
||
|
graphicsApi = QRhi::D3D11;
|
||
|
#elif defined(Q_OS_MACOS) || defined(Q_OS_IOS)
|
||
|
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 d3dOption({ "d", "d3d11" }, QLatin1String("Direct3D 11"));
|
||
|
cmdLineParser.addOption(d3dOption);
|
||
|
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(d3dOption))
|
||
|
graphicsApi = QRhi::D3D11;
|
||
|
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()));
|
||
|
|
||
|
QSurfaceFormat fmt;
|
||
|
fmt.setDepthBufferSize(24);
|
||
|
fmt.setStencilBufferSize(8);
|
||
|
QSurfaceFormat::setDefaultFormat(fmt);
|
||
|
|
||
|
#if QT_CONFIG(vulkan)
|
||
|
QVulkanInstance inst;
|
||
|
if (graphicsApi == QRhi::Vulkan) {
|
||
|
#ifndef Q_OS_ANDROID
|
||
|
inst.setLayers({ "VK_LAYER_LUNARG_standard_validation" });
|
||
|
#else
|
||
|
inst.setLayers({
|
||
|
"VK_LAYER_GOOGLE_threading",
|
||
|
"VK_LAYER_LUNARG_parameter_validation",
|
||
|
"VK_LAYER_LUNARG_object_tracker",
|
||
|
"VK_LAYER_LUNARG_core_validation",
|
||
|
"VK_LAYER_LUNARG_image",
|
||
|
"VK_LAYER_LUNARG_swapchain",
|
||
|
"VK_LAYER_GOOGLE_unique_objects"});
|
||
|
#endif
|
||
|
inst.setExtensions({ "VK_KHR_get_physical_device_properties2" });
|
||
|
if (!inst.create()) {
|
||
|
qWarning("Failed to create Vulkan instance, switching to OpenGL");
|
||
|
graphicsApi = QRhi::OpenGLES2;
|
||
|
}
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
HelloWindow w(graphicsApi);
|
||
|
#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;
|
||
|
}
|