129 lines
4.6 KiB
C++
129 lines
4.6 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2017 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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#include "hellovulkanwindow.h"
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#include <QVulkanFunctions>
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//! [0]
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QVulkanWindowRenderer *VulkanWindow::createRenderer()
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{
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return new VulkanRenderer(this);
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}
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VulkanRenderer::VulkanRenderer(QVulkanWindow *w)
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: m_window(w)
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{
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}
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//! [0]
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//! [1]
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void VulkanRenderer::initResources()
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{
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qDebug("initResources");
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m_devFuncs = m_window->vulkanInstance()->deviceFunctions(m_window->device());
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}
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//! [1]
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void VulkanRenderer::initSwapChainResources()
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{
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qDebug("initSwapChainResources");
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}
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void VulkanRenderer::releaseSwapChainResources()
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{
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qDebug("releaseSwapChainResources");
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}
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void VulkanRenderer::releaseResources()
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{
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qDebug("releaseResources");
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}
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//! [2]
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void VulkanRenderer::startNextFrame()
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{
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m_green += 0.005f;
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if (m_green > 1.0f)
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m_green = 0.0f;
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VkClearColorValue clearColor = {{ 0.0f, m_green, 0.0f, 1.0f }};
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VkClearDepthStencilValue clearDS = { 1.0f, 0 };
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VkClearValue clearValues[2];
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memset(clearValues, 0, sizeof(clearValues));
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clearValues[0].color = clearColor;
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clearValues[1].depthStencil = clearDS;
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VkRenderPassBeginInfo rpBeginInfo;
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memset(&rpBeginInfo, 0, sizeof(rpBeginInfo));
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rpBeginInfo.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO;
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rpBeginInfo.renderPass = m_window->defaultRenderPass();
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rpBeginInfo.framebuffer = m_window->currentFramebuffer();
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const QSize sz = m_window->swapChainImageSize();
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rpBeginInfo.renderArea.extent.width = sz.width();
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rpBeginInfo.renderArea.extent.height = sz.height();
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rpBeginInfo.clearValueCount = 2;
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rpBeginInfo.pClearValues = clearValues;
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VkCommandBuffer cmdBuf = m_window->currentCommandBuffer();
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m_devFuncs->vkCmdBeginRenderPass(cmdBuf, &rpBeginInfo, VK_SUBPASS_CONTENTS_INLINE);
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// Do nothing else. We will just clear to green, changing the component on
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// every invocation. This also helps verifying the rate to which the thread
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// is throttled to. (The elapsed time between startNextFrame calls should
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// typically be around 16 ms. Note that rendering is 2 frames ahead of what
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// is displayed.)
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m_devFuncs->vkCmdEndRenderPass(cmdBuf);
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m_window->frameReady();
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m_window->requestUpdate(); // render continuously, throttled by the presentation rate
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}
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//! [2]
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