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/****************************************************************************
**
** Copyright (C) 2018 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
//! [0]
class VulkanRenderer : public QVulkanWindowRenderer
{
public:
VulkanRenderer(QVulkanWindow *w) : m_window(w) { }
void initResources() override
{
m_devFuncs = m_window->vulkanInstance()->deviceFunctions(m_window->device());
...
}
void initSwapChainResources() override { ... }
void releaseSwapChainResources() override { ... }
void releaseResources() override { ... }
void startNextFrame() override
{
VkCommandBuffer cmdBuf = m_window->currentCommandBuffer();
...
m_devFuncs->vkCmdBeginRenderPass(...);
...
m_window->frameReady();
}
private:
QVulkanWindow *m_window;
QVulkanDeviceFunctions *m_devFuncs;
};
class VulkanWindow : public QVulkanWindow
{
public:
QVulkanWindowRenderer *createRenderer() override {
return new VulkanRenderer(this);
}
};
int main(int argc, char *argv[])
{
QGuiApplication app(argc, argv);
QVulkanInstance inst;
// enable the standard validation layers, when available
inst.setLayers(QByteArrayList() << "VK_LAYER_LUNARG_standard_validation");
if (!inst.create())
qFatal("Failed to create Vulkan instance: %d", inst.errorCode());
VulkanWindow w;
w.setVulkanInstance(&inst);
w.showMaximized();
return app.exec();
}
//! [0]
//! [1]
class Renderer {
...
VkDescriptorBufferInfo m_uniformBufInfo[QVulkanWindow::MAX_CONCURRENT_FRAME_COUNT];
};
void Renderer::startNextFrame()
{
VkDescriptorBufferInfo &uniformBufInfo(m_uniformBufInfo[m_window->currentFrame()]);
...
}
//! [1]
//! [2]
class Renderer {
...
VkDescriptorBufferInfo m_uniformBufInfo[QVulkanWindow::MAX_CONCURRENT_FRAME_COUNT];
};
void Renderer::startNextFrame()
{
const int count = m_window->concurrentFrameCount();
for (int i = 0; i < count; ++i)
m_uniformBufInfo[i] = ...
...
}
//! [2]
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