51c22a1f51
Supported on OpenGL (and ES) 3.0+ and everywhere else. Can also be a render target, targeting a single slice at a time. Can be mipmapped, cannot be multisample. Reading back a given slice from a 3D texture is left as a future exercise, for now it is documented to be not supported. Upload is going to be limited to one slice in one upload entry, just like we specify one face or one miplevel for cubemap and mipmapped textures. This also involves some welcome hardening of how texture subresources are described internally: as we no longer can count on a layer index between 0..5 (as is the case with cubemaps), simply arrays with MAX_LAYER==6 are no longer sufficient. Switch to sufficiently dynamic data structures where applicable. On Vulkan rendering to a slice needs Vulkan 1.1 (and 1.1 enabled on the VkInstance). Task-number: QTBUG-89703 Change-Id: Ide6c20124ec9201d94ffc339dd479cd1ece777b0 Reviewed-by: Andy Nichols <andy.nichols@qt.io>
587 lines
18 KiB
C++
587 lines
18 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2018 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** BSD License Usage
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** Alternatively, you may use this file under the terms of the BSD license
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** as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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// Adapted from hellominimalcrossgfxtriangle with the frame rendering stripped out.
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// Include this file and implement Window::customInit, release and render.
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// Debug/validation layer is enabled for D3D and Vulkan.
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#include <QGuiApplication>
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#include <QCommandLineParser>
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#include <QWindow>
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#include <QPlatformSurfaceEvent>
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#include <QElapsedTimer>
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#include <QTimer>
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#include <QLoggingCategory>
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#include <QColorSpace>
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#include <QtGui/private/qshader_p.h>
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#include <QFile>
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#include <QtGui/private/qrhiprofiler_p.h>
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#include <QtGui/private/qrhinull_p.h>
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#ifndef QT_NO_OPENGL
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#include <QtGui/private/qrhigles2_p.h>
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#include <QOffscreenSurface>
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#endif
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#if QT_CONFIG(vulkan)
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#include <QtGui/private/qrhivulkan_p.h>
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#endif
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#ifdef Q_OS_WIN
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#include <QtGui/private/qrhid3d11_p.h>
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#endif
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#if defined(Q_OS_MACOS) || defined(Q_OS_IOS)
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#include <QtGui/private/qrhimetal_p.h>
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#endif
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QShader getShader(const QString &name)
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{
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QFile f(name);
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if (f.open(QIODevice::ReadOnly))
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return QShader::fromSerialized(f.readAll());
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return QShader();
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}
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enum GraphicsApi
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{
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Null,
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OpenGL,
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Vulkan,
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D3D11,
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Metal
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};
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GraphicsApi graphicsApi;
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QString graphicsApiName()
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{
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switch (graphicsApi) {
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case Null:
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return QLatin1String("Null (no output)");
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case OpenGL:
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return QLatin1String("OpenGL 2.x");
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case Vulkan:
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return QLatin1String("Vulkan");
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case D3D11:
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return QLatin1String("Direct3D 11");
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case Metal:
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return QLatin1String("Metal");
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default:
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break;
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}
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return QString();
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}
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QRhi::Flags rhiFlags = QRhi::EnableDebugMarkers;
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int sampleCount = 1;
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QRhiSwapChain::Flags scFlags;
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QRhi::BeginFrameFlags beginFrameFlags;
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QRhi::EndFrameFlags endFrameFlags;
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int framesUntilTdr = -1;
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bool transparentBackground = false;
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bool debugLayer = true;
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class Window : public QWindow
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{
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public:
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Window();
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~Window();
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protected:
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void init();
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void releaseResources();
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void resizeSwapChain();
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void releaseSwapChain();
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void render();
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void customInit();
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void customRelease();
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void customRender();
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void exposeEvent(QExposeEvent *) override;
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bool event(QEvent *) override;
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#ifdef EXAMPLEFW_KEYPRESS_EVENTS
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void keyPressEvent(QKeyEvent *e) override;
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#endif
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bool m_running = false;
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bool m_notExposed = false;
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bool m_newlyExposed = false;
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QRhi *m_r = nullptr;
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bool m_hasSwapChain = false;
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QRhiSwapChain *m_sc = nullptr;
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QRhiRenderBuffer *m_ds = nullptr;
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QRhiRenderPassDescriptor *m_rp = nullptr;
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QMatrix4x4 m_proj;
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QElapsedTimer m_timer;
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int m_frameCount;
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#ifndef QT_NO_OPENGL
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QOffscreenSurface *m_fallbackSurface = nullptr;
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#endif
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QColor m_clearColor;
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friend int main(int, char**);
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};
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Window::Window()
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{
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// Tell the platform plugin what we want.
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switch (graphicsApi) {
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case OpenGL:
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#if QT_CONFIG(opengl)
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setSurfaceType(OpenGLSurface);
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setFormat(QRhiGles2InitParams::adjustedFormat());
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#endif
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break;
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case Vulkan:
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setSurfaceType(VulkanSurface);
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break;
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case D3D11:
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setSurfaceType(Direct3DSurface);
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break;
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case Metal:
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#if (QT_VERSION >= QT_VERSION_CHECK(5, 12, 0))
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setSurfaceType(MetalSurface);
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#endif
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break;
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default:
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break;
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}
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m_clearColor = transparentBackground ? Qt::transparent : QColor::fromRgbF(0.4f, 0.7f, 0.0f, 1.0f);
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}
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Window::~Window()
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{
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releaseResources();
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}
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void Window::exposeEvent(QExposeEvent *)
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{
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// initialize and start rendering when the window becomes usable for graphics purposes
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if (isExposed() && !m_running) {
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m_running = true;
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init();
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resizeSwapChain();
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}
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const QSize surfaceSize = m_hasSwapChain ? m_sc->surfacePixelSize() : QSize();
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// stop pushing frames when not exposed (or size is 0)
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if ((!isExposed() || (m_hasSwapChain && surfaceSize.isEmpty())) && m_running)
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m_notExposed = true;
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// continue when exposed again and the surface has a valid size.
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// note that the surface size can be (0, 0) even though size() reports a valid one...
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if (isExposed() && m_running && m_notExposed && !surfaceSize.isEmpty()) {
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m_notExposed = false;
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m_newlyExposed = true;
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}
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// always render a frame on exposeEvent() (when exposed) in order to update
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// immediately on window resize.
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if (isExposed() && !surfaceSize.isEmpty())
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render();
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}
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bool Window::event(QEvent *e)
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{
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switch (e->type()) {
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case QEvent::UpdateRequest:
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render();
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break;
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case QEvent::PlatformSurface:
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// this is the proper time to tear down the swapchain (while the native window and surface are still around)
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if (static_cast<QPlatformSurfaceEvent *>(e)->surfaceEventType() == QPlatformSurfaceEvent::SurfaceAboutToBeDestroyed)
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releaseSwapChain();
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break;
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default:
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break;
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}
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return QWindow::event(e);
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}
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void Window::init()
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{
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if (graphicsApi == Null) {
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QRhiNullInitParams params;
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m_r = QRhi::create(QRhi::Null, ¶ms, rhiFlags);
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}
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#ifndef QT_NO_OPENGL
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if (graphicsApi == OpenGL) {
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m_fallbackSurface = QRhiGles2InitParams::newFallbackSurface();
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QRhiGles2InitParams params;
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params.fallbackSurface = m_fallbackSurface;
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params.window = this;
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m_r = QRhi::create(QRhi::OpenGLES2, ¶ms, rhiFlags);
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}
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#endif
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#if QT_CONFIG(vulkan)
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if (graphicsApi == Vulkan) {
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QRhiVulkanInitParams params;
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params.inst = vulkanInstance();
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params.window = this;
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m_r = QRhi::create(QRhi::Vulkan, ¶ms, rhiFlags);
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}
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#endif
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#ifdef Q_OS_WIN
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if (graphicsApi == D3D11) {
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QRhiD3D11InitParams params;
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if (debugLayer)
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qDebug("Enabling D3D11 debug layer");
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params.enableDebugLayer = debugLayer;
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if (framesUntilTdr > 0) {
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params.framesUntilKillingDeviceViaTdr = framesUntilTdr;
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params.repeatDeviceKill = true;
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}
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m_r = QRhi::create(QRhi::D3D11, ¶ms, rhiFlags);
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}
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#endif
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#if defined(Q_OS_MACOS) || defined(Q_OS_IOS)
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if (graphicsApi == Metal) {
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QRhiMetalInitParams params;
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m_r = QRhi::create(QRhi::Metal, ¶ms, rhiFlags);
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}
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#endif
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if (!m_r)
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qFatal("Failed to create RHI backend");
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// now onto the backend-independent init
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m_sc = m_r->newSwapChain();
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// allow depth-stencil, although we do not actually enable depth test/write for the triangle
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m_ds = m_r->newRenderBuffer(QRhiRenderBuffer::DepthStencil,
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QSize(), // no need to set the size here, due to UsedWithSwapChainOnly
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sampleCount,
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QRhiRenderBuffer::UsedWithSwapChainOnly);
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m_sc->setWindow(this);
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m_sc->setDepthStencil(m_ds);
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m_sc->setSampleCount(sampleCount);
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m_sc->setFlags(scFlags);
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m_rp = m_sc->newCompatibleRenderPassDescriptor();
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m_sc->setRenderPassDescriptor(m_rp);
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customInit();
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}
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void Window::releaseResources()
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{
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customRelease();
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delete m_rp;
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m_rp = nullptr;
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delete m_ds;
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m_ds = nullptr;
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delete m_sc;
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m_sc = nullptr;
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delete m_r;
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m_r = nullptr;
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#ifndef QT_NO_OPENGL
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delete m_fallbackSurface;
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m_fallbackSurface = nullptr;
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#endif
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}
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void Window::resizeSwapChain()
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{
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m_hasSwapChain = m_sc->createOrResize(); // also handles m_ds
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m_frameCount = 0;
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m_timer.restart();
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const QSize outputSize = m_sc->currentPixelSize();
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m_proj = m_r->clipSpaceCorrMatrix();
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m_proj.perspective(45.0f, outputSize.width() / (float) outputSize.height(), 0.01f, 1000.0f);
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m_proj.translate(0, 0, -4);
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}
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void Window::releaseSwapChain()
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{
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if (m_hasSwapChain) {
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m_hasSwapChain = false;
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m_sc->destroy();
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}
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}
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void Window::render()
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{
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if (!m_hasSwapChain || m_notExposed)
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return;
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// If the window got resized or got newly exposed, resize the swapchain.
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// (the newly-exposed case is not actually required by some
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// platforms/backends, but f.ex. Vulkan on Windows seems to need it)
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if (m_sc->currentPixelSize() != m_sc->surfacePixelSize() || m_newlyExposed) {
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resizeSwapChain();
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if (!m_hasSwapChain)
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return;
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m_newlyExposed = false;
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}
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// Start a new frame. This is where we block when too far ahead of
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// GPU/present, and that's what throttles the thread to the refresh rate.
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// (except for OpenGL where it happens either in endFrame or somewhere else
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// depending on the GL implementation)
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QRhi::FrameOpResult r = m_r->beginFrame(m_sc, beginFrameFlags);
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if (r == QRhi::FrameOpSwapChainOutOfDate) {
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resizeSwapChain();
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if (!m_hasSwapChain)
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return;
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r = m_r->beginFrame(m_sc);
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}
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if (r != QRhi::FrameOpSuccess) {
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requestUpdate();
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return;
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}
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m_frameCount += 1;
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if (m_timer.elapsed() > 1000) {
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if (rhiFlags.testFlag(QRhi::EnableProfiling)) {
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const QRhiProfiler::CpuTime ff = m_r->profiler()->frameToFrameTimes(m_sc);
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const QRhiProfiler::CpuTime be = m_r->profiler()->frameBuildTimes(m_sc);
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const QRhiProfiler::GpuTime gp = m_r->profiler()->gpuFrameTimes(m_sc);
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if (m_r->isFeatureSupported(QRhi::Timestamps)) {
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qDebug("ca. %d fps. "
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"frame-to-frame: min %lld max %lld avg %f. "
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"frame build: min %lld max %lld avg %f. "
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"gpu frame time: min %f max %f avg %f",
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m_frameCount,
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ff.minTime, ff.maxTime, ff.avgTime,
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be.minTime, be.maxTime, be.avgTime,
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gp.minTime, gp.maxTime, gp.avgTime);
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} else {
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qDebug("ca. %d fps. "
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"frame-to-frame: min %lld max %lld avg %f. "
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"frame build: min %lld max %lld avg %f. ",
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m_frameCount,
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ff.minTime, ff.maxTime, ff.avgTime,
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be.minTime, be.maxTime, be.avgTime);
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}
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} else {
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qDebug("ca. %d fps", m_frameCount);
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}
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m_timer.restart();
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m_frameCount = 0;
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}
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customRender();
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m_r->endFrame(m_sc, endFrameFlags);
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if (!scFlags.testFlag(QRhiSwapChain::NoVSync))
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requestUpdate();
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else // try prevent all delays when NoVSync
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QCoreApplication::postEvent(this, new QEvent(QEvent::UpdateRequest));
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}
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int main(int argc, char **argv)
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{
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QGuiApplication app(argc, argv);
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QLoggingCategory::setFilterRules(QLatin1String("qt.rhi.*=true"));
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// Defaults.
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#if defined(Q_OS_WIN)
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graphicsApi = D3D11;
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#elif defined(Q_OS_MACOS) || defined(Q_OS_IOS)
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graphicsApi = Metal;
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#elif QT_CONFIG(vulkan)
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graphicsApi = Vulkan;
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#else
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graphicsApi = OpenGL;
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#endif
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// Allow overriding via the command line.
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QCommandLineParser cmdLineParser;
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cmdLineParser.addHelpOption();
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QCommandLineOption nullOption({ "n", "null" }, QLatin1String("Null"));
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cmdLineParser.addOption(nullOption);
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QCommandLineOption glOption({ "g", "opengl" }, QLatin1String("OpenGL (2.x)"));
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cmdLineParser.addOption(glOption);
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QCommandLineOption vkOption({ "v", "vulkan" }, QLatin1String("Vulkan"));
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cmdLineParser.addOption(vkOption);
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QCommandLineOption d3dOption({ "d", "d3d11" }, QLatin1String("Direct3D 11"));
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cmdLineParser.addOption(d3dOption);
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QCommandLineOption mtlOption({ "m", "metal" }, QLatin1String("Metal"));
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cmdLineParser.addOption(mtlOption);
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// Testing cleanup both with QWindow::close() (hitting X or Alt-F4) and
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// QCoreApplication::quit() (e.g. what a menu widget would do) is important.
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// Use this parameter for the latter.
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QCommandLineOption sdOption({ "s", "self-destruct" }, QLatin1String("Self-destruct after 5 seconds."));
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cmdLineParser.addOption(sdOption);
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// Attempt testing device lost situations on D3D at least.
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QCommandLineOption tdrOption(QLatin1String("curse"), QLatin1String("Curse the graphics device. "
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"(generate a device reset every <count> frames when on D3D11)"),
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QLatin1String("count"));
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cmdLineParser.addOption(tdrOption);
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// Allow testing preferring the software adapter (D3D).
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QCommandLineOption swOption(QLatin1String("software"), QLatin1String("Prefer a software renderer when choosing the adapter. "
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"Only applicable with some APIs and platforms."));
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cmdLineParser.addOption(swOption);
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// Allow testing having a semi-transparent window.
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QCommandLineOption transparentOption(QLatin1String("transparent"), QLatin1String("Make background transparent"));
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cmdLineParser.addOption(transparentOption);
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cmdLineParser.process(app);
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if (cmdLineParser.isSet(nullOption))
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graphicsApi = Null;
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if (cmdLineParser.isSet(glOption))
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graphicsApi = OpenGL;
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if (cmdLineParser.isSet(vkOption))
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graphicsApi = Vulkan;
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if (cmdLineParser.isSet(d3dOption))
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graphicsApi = D3D11;
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if (cmdLineParser.isSet(mtlOption))
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graphicsApi = Metal;
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|
|
|
qDebug("Selected graphics API is %s", qPrintable(graphicsApiName()));
|
|
qDebug("This is a multi-api example, use command line arguments to override:\n%s", qPrintable(cmdLineParser.helpText()));
|
|
|
|
if (cmdLineParser.isSet(transparentOption)) {
|
|
transparentBackground = true;
|
|
scFlags |= QRhiSwapChain::SurfaceHasPreMulAlpha;
|
|
}
|
|
|
|
#ifdef EXAMPLEFW_PREINIT
|
|
void preInit();
|
|
preInit();
|
|
#endif
|
|
|
|
// OpenGL specifics.
|
|
QSurfaceFormat fmt;
|
|
fmt.setDepthBufferSize(24);
|
|
fmt.setStencilBufferSize(8);
|
|
if (sampleCount > 1)
|
|
fmt.setSamples(sampleCount);
|
|
if (scFlags.testFlag(QRhiSwapChain::NoVSync))
|
|
fmt.setSwapInterval(0);
|
|
if (scFlags.testFlag(QRhiSwapChain::sRGB))
|
|
fmt.setColorSpace(QColorSpace::SRgb);
|
|
// Exception: The alpha size is not necessarily OpenGL specific.
|
|
if (transparentBackground)
|
|
fmt.setAlphaBufferSize(8);
|
|
QSurfaceFormat::setDefaultFormat(fmt);
|
|
|
|
// Vulkan setup.
|
|
#if QT_CONFIG(vulkan)
|
|
QVulkanInstance inst;
|
|
if (graphicsApi == Vulkan) {
|
|
if (debugLayer) {
|
|
qDebug("Enabling Vulkan validation layer (if available)");
|
|
inst.setLayers({ "VK_LAYER_KHRONOS_validation" });
|
|
}
|
|
const QVersionNumber supportedVersion = inst.supportedApiVersion();
|
|
qDebug() << "Supported Vulkan API version:" << supportedVersion;
|
|
if (supportedVersion >= QVersionNumber(1, 1)) {
|
|
qDebug("Requesting Vulkan API 1.1 on the VkInstance");
|
|
inst.setApiVersion(QVersionNumber(1, 1));
|
|
}
|
|
inst.setExtensions(QRhiVulkanInitParams::preferredInstanceExtensions());
|
|
if (!inst.create()) {
|
|
qWarning("Failed to create Vulkan instance, switching to OpenGL");
|
|
graphicsApi = OpenGL;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (cmdLineParser.isSet(tdrOption))
|
|
framesUntilTdr = cmdLineParser.value(tdrOption).toInt();
|
|
|
|
if (cmdLineParser.isSet(swOption))
|
|
rhiFlags |= QRhi::PreferSoftwareRenderer;
|
|
|
|
// Create and show the window.
|
|
Window w;
|
|
#if QT_CONFIG(vulkan)
|
|
if (graphicsApi == Vulkan)
|
|
w.setVulkanInstance(&inst);
|
|
#endif
|
|
w.resize(1280, 720);
|
|
w.setTitle(QCoreApplication::applicationName() + QLatin1String(" - ") + graphicsApiName());
|
|
w.show();
|
|
|
|
if (cmdLineParser.isSet(sdOption))
|
|
QTimer::singleShot(5000, qGuiApp, SLOT(quit()));
|
|
|
|
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;
|
|
}
|