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50
51#include "hellovulkanwindow.h"
52#include <QVulkanFunctions>
53
54//! [0]
55QVulkanWindowRenderer *VulkanWindow::createRenderer()
56{
57 return new VulkanRenderer(this);
58}
59
60VulkanRenderer::VulkanRenderer(QVulkanWindow *w)
61 : m_window(w)
62{
63}
64//! [0]
65
66//! [1]
67void VulkanRenderer::initResources()
68{
69 qDebug("initResources");
70
71 m_devFuncs = m_window->vulkanInstance()->deviceFunctions(m_window->device());
72}
73//! [1]
74
75void VulkanRenderer::initSwapChainResources()
76{
77 qDebug("initSwapChainResources");
78}
79
80void VulkanRenderer::releaseSwapChainResources()
81{
82 qDebug("releaseSwapChainResources");
83}
84
85void VulkanRenderer::releaseResources()
86{
87 qDebug("releaseResources");
88}
89
90//! [2]
91void VulkanRenderer::startNextFrame()
92{
93 m_green += 0.005f;
94 if (m_green > 1.0f)
95 m_green = 0.0f;
96
97 VkClearColorValue clearColor = {{ 0.0f, m_green, 0.0f, 1.0f }};
98 VkClearDepthStencilValue clearDS = { 1.0f, 0 };
99 VkClearValue clearValues[2];
100 memset(clearValues, 0, sizeof(clearValues));
101 clearValues[0].color = clearColor;
102 clearValues[1].depthStencil = clearDS;
103
104 VkRenderPassBeginInfo rpBeginInfo;
105 memset(&rpBeginInfo, 0, sizeof(rpBeginInfo));
106 rpBeginInfo.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO;
107 rpBeginInfo.renderPass = m_window->defaultRenderPass();
108 rpBeginInfo.framebuffer = m_window->currentFramebuffer();
109 const QSize sz = m_window->swapChainImageSize();
110 rpBeginInfo.renderArea.extent.width = sz.width();
111 rpBeginInfo.renderArea.extent.height = sz.height();
112 rpBeginInfo.clearValueCount = 2;
113 rpBeginInfo.pClearValues = clearValues;
114 VkCommandBuffer cmdBuf = m_window->currentCommandBuffer();
115 m_devFuncs->vkCmdBeginRenderPass(cmdBuf, &rpBeginInfo, VK_SUBPASS_CONTENTS_INLINE);
116
117 // Do nothing else. We will just clear to green, changing the component on
118 // every invocation. This also helps verifying the rate to which the thread
119 // is throttled to. (The elapsed time between startNextFrame calls should
120 // typically be around 16 ms. Note that rendering is 2 frames ahead of what
121 // is displayed.)
122
123 m_devFuncs->vkCmdEndRenderPass(cmdBuf);
124
125 m_window->frameReady();
126 m_window->requestUpdate(); // render continuously, throttled by the presentation rate
127}
128//! [2]
129