1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2018 The Qt Company Ltd. 4 ** Contact: https://www.qt.io/licensing/ 5 ** 6 ** This file is part of the documentation of the Qt Toolkit. 7 ** 8 ** $QT_BEGIN_LICENSE:BSD$ 9 ** Commercial License Usage 10 ** Licensees holding valid commercial Qt licenses may use this file in 11 ** accordance with the commercial license agreement provided with the 12 ** Software or, alternatively, in accordance with the terms contained in 13 ** a written agreement between you and The Qt Company. For licensing terms 14 ** and conditions see https://www.qt.io/terms-conditions. For further 15 ** information use the contact form at https://www.qt.io/contact-us. 16 ** 17 ** BSD License Usage 18 ** Alternatively, you may use this file under the terms of the BSD license 19 ** as follows: 20 ** 21 ** "Redistribution and use in source and binary forms, with or without 22 ** modification, are permitted provided that the following conditions are 23 ** met: 24 ** * Redistributions of source code must retain the above copyright 25 ** notice, this list of conditions and the following disclaimer. 26 ** * Redistributions in binary form must reproduce the above copyright 27 ** notice, this list of conditions and the following disclaimer in 28 ** the documentation and/or other materials provided with the 29 ** distribution. 30 ** * Neither the name of The Qt Company Ltd nor the names of its 31 ** contributors may be used to endorse or promote products derived 32 ** from this software without specific prior written permission. 33 ** 34 ** 35 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 38 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 39 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 40 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 41 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 42 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 43 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 44 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 45 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." 46 ** 47 ** $QT_END_LICENSE$ 48 ** 49 ****************************************************************************/ 50 51 //! [0] 52 class VulkanRenderer : public QVulkanWindowRenderer 53 { 54 public: VulkanRenderer(QVulkanWindow * w)55 VulkanRenderer(QVulkanWindow *w) : m_window(w) { } 56 initResources()57 void initResources() override 58 { 59 m_devFuncs = m_window->vulkanInstance()->deviceFunctions(m_window->device()); 60 ... 61 } initSwapChainResources()62 void initSwapChainResources() override { ... } releaseSwapChainResources()63 void releaseSwapChainResources() override { ... } releaseResources()64 void releaseResources() override { ... } 65 startNextFrame()66 void startNextFrame() override 67 { 68 VkCommandBuffer cmdBuf = m_window->currentCommandBuffer(); 69 ... 70 m_devFuncs->vkCmdBeginRenderPass(...); 71 ... 72 m_window->frameReady(); 73 } 74 75 private: 76 QVulkanWindow *m_window; 77 QVulkanDeviceFunctions *m_devFuncs; 78 }; 79 80 class VulkanWindow : public QVulkanWindow 81 { 82 public: createRenderer()83 QVulkanWindowRenderer *createRenderer() override { 84 return new VulkanRenderer(this); 85 } 86 }; 87 main(int argc,char * argv[])88 int main(int argc, char *argv[]) 89 { 90 QGuiApplication app(argc, argv); 91 92 QVulkanInstance inst; 93 // enable the standard validation layers, when available 94 inst.setLayers(QByteArrayList() << "VK_LAYER_LUNARG_standard_validation"); 95 if (!inst.create()) 96 qFatal("Failed to create Vulkan instance: %d", inst.errorCode()); 97 98 VulkanWindow w; 99 w.setVulkanInstance(&inst); 100 w.showMaximized(); 101 102 return app.exec(); 103 } 104 //! [0] 105 106 //! [1] 107 class Renderer { 108 ... 109 VkDescriptorBufferInfo m_uniformBufInfo[QVulkanWindow::MAX_CONCURRENT_FRAME_COUNT]; 110 }; 111 startNextFrame()112 void Renderer::startNextFrame() 113 { 114 VkDescriptorBufferInfo &uniformBufInfo(m_uniformBufInfo[m_window->currentFrame()]); 115 ... 116 } 117 //! [1] 118 119 //! [2] 120 class Renderer { 121 ... 122 VkDescriptorBufferInfo m_uniformBufInfo[QVulkanWindow::MAX_CONCURRENT_FRAME_COUNT]; 123 }; 124 startNextFrame()125 void Renderer::startNextFrame() 126 { 127 const int count = m_window->concurrentFrameCount(); 128 for (int i = 0; i < count; ++i) 129 m_uniformBufInfo[i] = ... 130 ... 131 } 132 //! [2] 133