hellovulkanwindow.cpp Example File

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

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