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cpp-vulkan-setup
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Create and use render pipeline with shaders

This commit is contained in:
Ben 2022-01-18 23:33:20 +01:00
parent 7127555dea
commit e8cd239a6b
Signed by: ben
GPG Key ID: 0F54A7ED232D3319
6 changed files with 152 additions and 80 deletions
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16
src/ShaderLoader.cpp
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@ -8,22 +8,26 @@ std::vector<VkShaderModule> ShaderLoader::loadShaders(
for (int i = 0; i < shaderFilenameCount; ++i) {
std::ifstream shaderFile(shaderFilenames[i],
std::ios::ate | std::ios::binary);
assert(shaderFile.is_open());
if (!shaderFile.is_open()) {
qFatal("Could not open shader file %s", shaderFilenames[i].c_str());
}
// std::ios::ate starts at the end of file => position is the file size
const std::fpos<mbstate_t> &fileSize = shaderFile.tellg();
std::vector<char> buffer(fileSize);
std::vector<uint32_t> buffer((fileSize / sizeof(uint32_t)) + 1);
shaderFile.seekg(0);
shaderFile.read(buffer.data(), fileSize);
shaderFile.read(reinterpret_cast<char *>(buffer.data()), fileSize);
shaderFile.close();
VkShaderModuleCreateInfo createInfo{};
createInfo.sType = VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO;
createInfo.codeSize = buffer.size();
createInfo.pCode = reinterpret_cast<const uint32_t *>(buffer.data());
createInfo.codeSize = fileSize;
createInfo.pCode = buffer.data();
VkShaderModule shaderModule;
VkResult result = deviceFunctions->vkCreateShaderModule(
device, &createInfo, nullptr, &shaderModule);
assert(result == VK_SUCCESS);
if (result != VK_SUCCESS) {
qFatal("Could not create shader module: code %d", result);
}
loadedShaders.push_back(shaderModule);
}
return loadedShaders;

2
src/ShaderLoader.h
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@ -9,7 +9,7 @@
class ShaderLoader {
private:
std::vector<VkShaderModule> loadedShaders;
std::vector<VkShaderModule> loadedShaders{};
public:
ShaderLoader() = default;

191
src/VulkanRenderer.cpp
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@ -1,11 +1,33 @@
#include "VulkanRenderer.h"
#include <complex>
VulkanRenderer::VulkanRenderer(QVulkanWindow *w)
: m_window(w), m_devFuncs(nullptr) {}
VulkanRenderer::VulkanRenderer(QVulkanWindow *w) : m_window(w) {}
void VulkanRenderer::initResources() {
VkResult result;
m_devFuncs = m_window->vulkanInstance()->deviceFunctions(m_window->device());
VkPipelineLayoutCreateInfo pipelineLayoutInfo{};
pipelineLayoutInfo.sType = VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO;
pipelineLayoutInfo.setLayoutCount = 0; // Optional
pipelineLayoutInfo.pSetLayouts = nullptr; // Optional
pipelineLayoutInfo.pushConstantRangeCount = 0; // Optional
pipelineLayoutInfo.pPushConstantRanges = nullptr; // Optional
result = m_devFuncs->vkCreatePipelineLayout(
m_window->device(), &pipelineLayoutInfo, nullptr, &m_pipelineLayout);
if (result != VK_SUCCESS) {
qFatal("Failed to create pipeline layout, code: %d", result);
}
VkPipelineVertexInputStateCreateInfo vertexInputInfo{};
vertexInputInfo.sType =
VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO;
vertexInputInfo.vertexBindingDescriptionCount = 0;
vertexInputInfo.pVertexBindingDescriptions = nullptr; // Optional
vertexInputInfo.vertexAttributeDescriptionCount = 0;
vertexInputInfo.pVertexAttributeDescriptions = nullptr; // Optional
auto shaders =
std::array<std::string, 2>{"shaders/vert.spv", "shaders/frag.spv"};
auto loadedShaders =
@ -22,66 +44,102 @@ void VulkanRenderer::initResources() {
fragShaderStageInfo.stage = VK_SHADER_STAGE_FRAGMENT_BIT;
fragShaderStageInfo.module = loadedShaders[1];
fragShaderStageInfo.pName = "main";
std::array<VkPipelineShaderStageCreateInfo, 2> shaderStages{
vertShaderStageInfo, fragShaderStageInfo};
VkGraphicsPipelineCreateInfo pipelineInfo{};
pipelineInfo.sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO;
pipelineInfo.stageCount = shaderStages.size();
pipelineInfo.pStages = shaderStages.data();
pipelineInfo.pVertexInputState = &vertexInputInfo;
VkPipelineInputAssemblyStateCreateInfo ia;
memset(&ia, 0, sizeof(ia));
ia.sType = VK_STRUCTURE_TYPE_PIPELINE_INPUT_ASSEMBLY_STATE_CREATE_INFO;
ia.topology = VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST;
pipelineInfo.pInputAssemblyState = &ia;
VkPipelineViewportStateCreateInfo vp;
memset(&vp, 0, sizeof(vp));
vp.sType = VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_STATE_CREATE_INFO;
vp.viewportCount = 1;
vp.scissorCount = 1;
pipelineInfo.pViewportState = &vp;
VkPipelineRasterizationStateCreateInfo rs;
memset(&rs, 0, sizeof(rs));
rs.sType = VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_STATE_CREATE_INFO;
rs.polygonMode = VK_POLYGON_MODE_FILL;
// rs.cullMode = VK_CULL_MODE_BACK_BIT;
rs.cullMode = VK_CULL_MODE_NONE;
rs.frontFace = VK_FRONT_FACE_COUNTER_CLOCKWISE;
rs.lineWidth = 1.0f;
pipelineInfo.pRasterizationState = &rs;
VkPipelineMultisampleStateCreateInfo ms;
memset(&ms, 0, sizeof(ms));
ms.sType = VK_STRUCTURE_TYPE_PIPELINE_MULTISAMPLE_STATE_CREATE_INFO;
ms.rasterizationSamples = m_window->sampleCountFlagBits();
pipelineInfo.pMultisampleState = &ms;
VkPipelineDepthStencilStateCreateInfo ds;
memset(&ds, 0, sizeof(ds));
ds.sType = VK_STRUCTURE_TYPE_PIPELINE_DEPTH_STENCIL_STATE_CREATE_INFO;
ds.depthTestEnable = VK_FALSE;
ds.depthWriteEnable = VK_TRUE;
ds.depthCompareOp = VK_COMPARE_OP_LESS_OR_EQUAL;
pipelineInfo.pDepthStencilState = &ds;
VkPipelineColorBlendStateCreateInfo cb;
memset(&cb, 0, sizeof(cb));
cb.sType = VK_STRUCTURE_TYPE_PIPELINE_COLOR_BLEND_STATE_CREATE_INFO;
VkPipelineColorBlendAttachmentState att;
memset(&att, 0, sizeof(att));
att.colorWriteMask = 0xF;
cb.attachmentCount = 1;
cb.pAttachments = &att;
pipelineInfo.pColorBlendState = &cb;
VkDynamicState dynamicStates[] = {VK_DYNAMIC_STATE_VIEWPORT,
VK_DYNAMIC_STATE_SCISSOR};
VkPipelineDynamicStateCreateInfo dyn;
memset(&dyn, 0, sizeof(dyn));
dyn.sType = VK_STRUCTURE_TYPE_PIPELINE_DYNAMIC_STATE_CREATE_INFO;
dyn.dynamicStateCount = sizeof(dynamicStates) / sizeof(VkDynamicState);
dyn.pDynamicStates = dynamicStates;
pipelineInfo.pDynamicState = &dyn;
pipelineInfo.layout = m_pipelineLayout;
pipelineInfo.renderPass = m_window->defaultRenderPass();
pipelineInfo.basePipelineHandle = VK_NULL_HANDLE; // Optional
pipelineInfo.basePipelineIndex = -1; // Optional
result = m_devFuncs->vkCreateGraphicsPipelines(
m_window->device(), VK_NULL_HANDLE, 1, &pipelineInfo, nullptr,
&m_graphicsPipeline);
if (result != VK_SUCCESS) {
qFatal("Failed to create graphics pipeline: code %d", result);
}
}
//void VulkanRenderer::initSwapChainResources() {
// qDebug() << "initSwapChainResources";
// VkFramebufferCreateInfo framebufferInfo = {};
// framebufferInfo.sType = VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO;
// framebufferInfo.pNext = nullptr;
// framebufferInfo.renderPass = m_renderPass;
// framebufferInfo.attachmentCount = 1;
// framebufferInfo.width = m_window->width();
// framebufferInfo.height = m_window->height();
// framebufferInfo.layers = 1;
//
// m_swapChainImages = std::vector<VkImage>(m_window->swapChainImageCount());
// m_swapChainImageViews =
// std::vector<VkImageView>(m_window->swapChainImageCount());
// m_framebuffers =
// std::vector<VkFramebuffer>(m_window->swapChainImageCount()); for (int i =
// 0; i < m_window->swapChainImageCount(); ++i) {
// m_swapChainImages[i] = m_window->swapChainImage(i);
// m_swapChainImageViews[i] = m_window->swapChainImageView(i);
//
// framebufferInfo.pAttachments = &m_swapChainImageViews[i];
// VkResult vkResult = m_devFuncs->vkCreateFramebuffer(
// m_window->device(), &framebufferInfo, nullptr, &m_framebuffers[i]);
// assert(vkResult == VK_SUCCESS);
// }
//}
//void VulkanRenderer::releaseSwapChainResources() {
// destruction of swap chain image views are handled in Qt framework
// for (auto& imageView : m_swapChainImageViews) {
// m_devFuncs->vkDestroyImageView(m_window->device(), imageView, nullptr);
// }
// for (auto &framebuffer : m_framebuffers) {
// m_devFuncs->vkDestroyFramebuffer(m_window->device(), framebuffer,
// nullptr);
// }
// destruction of the default render pass is handled in Qt framework
// m_devFuncs->vkDestroyRenderPass(m_window->device(), m_renderPass,
// nullptr);
//}
void VulkanRenderer::releaseResources() {
m_devFuncs->vkDestroyPipeline(m_window->device(), m_graphicsPipeline,
nullptr);
m_devFuncs->vkDestroyPipelineLayout(m_window->device(), m_pipelineLayout,
nullptr);
m_shaderLoader.destroyShaders(m_window->device(), m_devFuncs);
}
void VulkanRenderer::startNextFrame() {
VkCommandBuffer cmdBuf = m_window->currentCommandBuffer();
// make a clear-color from frame number. This will flash with a 120*pi frame
// period.
VkClearValue clearValue;
VkClearDepthStencilValue clearDS = {1, 0};
std::array<VkClearValue, 3> clearValue{};
float flash = std::abs(std::sin(static_cast<float>(m_frameNumber) / 120.f));
clearValue.color = {{0.0f, 0.0f, flash, 1.0f}};
clearValue[0].color = {{0.0f, 0.0f, flash, 1.0f}};
clearValue[1].depthStencil = clearDS;
clearValue[2].color = clearValue[0].color;
// start the main renderpass.
// We will use the clear color from above, and the framebuffer of the index
// the swapchain gave us
VkRenderPassBeginInfo rpInfo = {};
VkRenderPassBeginInfo rpInfo{};
rpInfo.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO;
rpInfo.pNext = nullptr;
@ -90,20 +148,31 @@ void VulkanRenderer::startNextFrame() {
rpInfo.renderArea.offset.y = 0;
rpInfo.renderArea.extent.width = m_window->width();
rpInfo.renderArea.extent.height = m_window->height();
rpInfo.clearValueCount =
m_window->sampleCountFlagBits() > VK_SAMPLE_COUNT_1_BIT ? 3 : 2;
rpInfo.pClearValues = clearValue.data();
rpInfo.framebuffer = m_window->currentFramebuffer();
// connect clear values
rpInfo.clearValueCount = 1;
rpInfo.pClearValues = &clearValue;
m_devFuncs->vkCmdBeginRenderPass(cmdBuf, &rpInfo, VK_SUBPASS_CONTENTS_INLINE);
// int imageIndex = m_window->currentSwapChainImageIndex();
// uint32_t swapchainImageIndex;
// VK_CHECK(vkAcquireNextImageKHR(_device, _swapchain, 1000000000,
// _presentSemaphore, nullptr, &swapchainImageIndex));
// m_devFuncs->vkCmdEndRenderPass(cmdBuf);
++m_frameNumber;
const QSize renderTargetSize = m_window->swapChainImageSize();
VkViewport viewport = {
0, 0, float(renderTargetSize.width()), float(renderTargetSize.height()),
0, 1};
m_devFuncs->vkCmdSetViewport(cmdBuf, 0, 1, &viewport);
VkRect2D scissor = {{0, 0},
{uint32_t(renderTargetSize.width()),
uint32_t(renderTargetSize.height())}};
m_devFuncs->vkCmdSetScissor(cmdBuf, 0, 1, &scissor);
m_devFuncs->vkCmdBindPipeline(cmdBuf, VK_PIPELINE_BIND_POINT_GRAPHICS,
m_graphicsPipeline);
m_devFuncs->vkCmdDraw(cmdBuf, 3, 1, 0, 0);
m_devFuncs->vkCmdEndRenderPass(cmdBuf);
m_window->frameReady();
++m_frameNumber;
m_window->requestUpdate();
}

6
src/VulkanRenderer.h
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@ -16,9 +16,11 @@ public:
private:
QVulkanWindow *m_window;
QVulkanDeviceFunctions *m_devFuncs;
QVulkanDeviceFunctions *m_devFuncs{};
unsigned long m_frameNumber{0UL};
ShaderLoader m_shaderLoader;
ShaderLoader m_shaderLoader{};
VkPipelineLayout m_pipelineLayout{};
VkPipeline m_graphicsPipeline{};
};
#endif // VULKANCPPSETUP_VULKANRENDERER_H

5
src/VulkanWindow.cpp
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@ -6,9 +6,8 @@ static const int KEY_ESCAPE = 16777216;
void VulkanWindow::keyPressEvent(QKeyEvent *event) {
QWindow::keyPressEvent(event);
qDebug() << "text" << event->text()
<< "key" << event->key()
<< "modifiers" << event->modifiers();
qDebug() << "text" << event->text() << "key" << event->key() << "modifiers"
<< event->modifiers();
if (event->matches(QKeySequence::Quit) || event->key() == KEY_ESCAPE) {
close();
}

12
src/VulkanWindow.h
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@ -5,18 +5,16 @@
#ifndef VULKANCPPSETUP_VULKANWINDOW_H
#define VULKANCPPSETUP_VULKANWINDOW_H
#include <QVulkanWindow>
#include <iostream>
#include <qevent.h>
#include <QVulkanWindow>
class VulkanWindow : public QVulkanWindow
{
class VulkanWindow : public QVulkanWindow {
public:
QVulkanWindowRenderer *createRenderer() override;
QVulkanWindowRenderer *createRenderer() override;
protected:
void keyPressEvent(QKeyEvent* event) override;
void keyPressEvent(QKeyEvent *event) override;
};
#endif //VULKANCPPSETUP_VULKANWINDOW_H
#endif // VULKANCPPSETUP_VULKANWINDOW_H