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spock_pipeline.cpp
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#include "spock_pipeline.hpp"
#include <cstddef>
#include <fstream>
#include <iostream>
#include <stdexcept>
#include <vector>
#include <cassert>
#include <vulkan/vulkan_core.h>
namespace spock {
SpockPipeline::SpockPipeline(
SpockDevice& device,
const std::string& vertFilepath,
const std::string& fragFilepath,
const PipelineConfigInfo& configInfo
) : spockDevice {device} {
createGraphicsPipeline(vertFilepath, fragFilepath, configInfo);
}
SpockPipeline::~SpockPipeline() {
vkDestroyShaderModule(spockDevice.device(), vertShaderModule, nullptr);
vkDestroyPipeline(spockDevice.device(), graphicsPipeline, nullptr);
}
std::vector<char> SpockPipeline::readFile(const std::string& filepath) {
std::ifstream file { filepath, std::ios::ate | std::ios::binary};
if (!file.is_open()) {
throw std::runtime_error("Failed top open file: " + filepath);
}
size_t fileSize = static_cast<size_t>(file.tellg());
std::vector<char> buffer(fileSize);
file.seekg(0);
file.read(buffer.data(), fileSize);
file.close();
return buffer;
}
void SpockPipeline::createGraphicsPipeline (
const std::string& vertFilepath,
const std::string& fragFilepath,
const PipelineConfigInfo& configInfo
) {
assert(
configInfo.pipelineLayout != VK_NULL_HANDLE &&
"Cannot create graphics pipeline: pipelineLayout is null handle"
);
assert(
configInfo.renderPass != VK_NULL_HANDLE &&
"Cannot create graphics pipeline: renderpass is null handle"
);
auto vertCode = readFile(vertFilepath);
auto fragCode = readFile(fragFilepath);
std::cout << "Vertex Shader Code Size: " << vertCode.size() << std::endl;
std::cout << "Fragment Shader Code Size: " << fragCode.size() << std::endl;
createShaderModule(vertCode, &vertShaderModule);
createShaderModule(fragCode, &fragShaderModule);
VkPipelineShaderStageCreateInfo shaderStages[2];
shaderStages[0].sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO;
shaderStages[0].stage = VK_SHADER_STAGE_VERTEX_BIT;
shaderStages[0].module = vertShaderModule;
shaderStages[0].pName = "main";
shaderStages[0].flags = 0;
shaderStages[0].pNext = nullptr;
shaderStages[0].pSpecializationInfo = nullptr;
shaderStages[1].sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO;
shaderStages[1].stage = VK_SHADER_STAGE_FRAGMENT_BIT;
shaderStages[1].module = fragShaderModule;
shaderStages[1].pName = "main";
shaderStages[1].flags = 0;
shaderStages[1].pNext = nullptr;
shaderStages[1].pSpecializationInfo = nullptr;
VkPipelineVertexInputStateCreateInfo vertexInputInfo {};
vertexInputInfo.sType = VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO;
vertexInputInfo.vertexAttributeDescriptionCount = 0;
vertexInputInfo.vertexBindingDescriptionCount = 0;
vertexInputInfo.pVertexAttributeDescriptions = nullptr;
vertexInputInfo.pVertexBindingDescriptions = nullptr;
VkPipelineViewportStateCreateInfo viewportInfo {};
viewportInfo.sType = VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_STATE_CREATE_INFO;
viewportInfo.viewportCount = 1;
viewportInfo.pViewports = &configInfo.viewport;
viewportInfo.scissorCount = 1;
viewportInfo.pScissors = &configInfo.scissor;
VkGraphicsPipelineCreateInfo pipelineInfo {};
pipelineInfo.sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO;
pipelineInfo.stageCount = 2;
pipelineInfo.pStages = shaderStages;
pipelineInfo.pVertexInputState = &vertexInputInfo;
pipelineInfo.pInputAssemblyState = &configInfo.inputAssemblyInfo;
pipelineInfo.pViewportState = &viewportInfo;
pipelineInfo.pRasterizationState = &configInfo.rasterizationInfo;
pipelineInfo.pMultisampleState = &configInfo.multisampleInfo;
pipelineInfo.pColorBlendState = &configInfo.colorBlendInfo;
pipelineInfo.pDepthStencilState = &configInfo.depthStencilInfo;
pipelineInfo.pDynamicState = nullptr;
pipelineInfo.layout = configInfo.pipelineLayout;
pipelineInfo.renderPass = configInfo.renderPass;
pipelineInfo.subpass = configInfo.subpass;
pipelineInfo.basePipelineIndex = -1;
pipelineInfo.basePipelineHandle = VK_NULL_HANDLE;
if (vkCreateGraphicsPipelines(spockDevice.device(), VK_NULL_HANDLE, 1, &pipelineInfo, nullptr, &graphicsPipeline) != VK_SUCCESS) {
throw std::runtime_error("Failed to create graphics pipeline");
}
}
void SpockPipeline::createShaderModule(const std::vector<char>& code, VkShaderModule* shaderModule) {
VkShaderModuleCreateInfo createInfo {};
createInfo.sType = VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO;
createInfo.codeSize = code.size();
// only safe due to worst case alignment requirement, not valid with C-Style char array
createInfo.pCode = reinterpret_cast<const uint32_t*>(code.data());
if (vkCreateShaderModule(spockDevice.device(), &createInfo, nullptr, shaderModule) != VK_SUCCESS) {
throw std::runtime_error("Failed to create shader module");
}
}
void SpockPipeline::bind(VkCommandBuffer commandBuffer) {
vkCmdBindPipeline(commandBuffer, VK_PIPELINE_BIND_POINT_GRAPHICS, graphicsPipeline);
}
PipelineConfigInfo SpockPipeline::defaultPipelineConfigInfo(uint32_t width, uint32_t height) {
PipelineConfigInfo configInfo {};
configInfo.inputAssemblyInfo.sType = VK_STRUCTURE_TYPE_PIPELINE_INPUT_ASSEMBLY_STATE_CREATE_INFO;
configInfo.inputAssemblyInfo.topology = VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST;
configInfo.inputAssemblyInfo.primitiveRestartEnable = VK_FALSE;
configInfo.viewport.x = 0.0f;
configInfo.viewport.y = 0.0f;
configInfo.viewport.width = static_cast<float>(width);
configInfo.viewport.height = static_cast<float>(height);
configInfo.viewport.minDepth = 0.0f;
configInfo.viewport.maxDepth = 1.0f;
configInfo.scissor.offset = { 0, 0 };
configInfo.scissor.extent = { width, height };
configInfo.rasterizationInfo.sType = VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_STATE_CREATE_INFO;
configInfo.rasterizationInfo.depthBiasEnable = VK_FALSE;
configInfo.rasterizationInfo.rasterizerDiscardEnable = VK_FALSE;
configInfo.rasterizationInfo.polygonMode = VK_POLYGON_MODE_FILL;
configInfo.rasterizationInfo.lineWidth = 1.0f;
configInfo.rasterizationInfo.cullMode = VK_CULL_MODE_NONE; //BACK_BIT
configInfo.rasterizationInfo.frontFace = VK_FRONT_FACE_CLOCKWISE;
configInfo.rasterizationInfo.depthBiasEnable = VK_FALSE;
configInfo.rasterizationInfo.depthBiasConstantFactor = 0.0f;
configInfo.rasterizationInfo.depthBiasClamp = 0.0f;
configInfo.rasterizationInfo.depthBiasSlopeFactor = 0.0f;
configInfo.multisampleInfo.sType = VK_STRUCTURE_TYPE_PIPELINE_MULTISAMPLE_STATE_CREATE_INFO;
configInfo.multisampleInfo.sampleShadingEnable = VK_FALSE;
configInfo.multisampleInfo.rasterizationSamples = VK_SAMPLE_COUNT_1_BIT;
configInfo.multisampleInfo.minSampleShading = 1.0f;
configInfo.multisampleInfo.pSampleMask = nullptr;
configInfo.multisampleInfo.alphaToCoverageEnable = VK_FALSE;
configInfo.multisampleInfo.alphaToOneEnable = VK_FALSE;
configInfo.colorBlendAttachment.colorWriteMask = VK_COLOR_COMPONENT_R_BIT | VK_COLOR_COMPONENT_G_BIT | VK_COLOR_COMPONENT_B_BIT | VK_COLOR_COMPONENT_A_BIT;
configInfo.colorBlendAttachment.blendEnable = VK_FALSE;
configInfo.colorBlendAttachment.srcColorBlendFactor = VK_BLEND_FACTOR_ONE;
configInfo.colorBlendAttachment.dstColorBlendFactor = VK_BLEND_FACTOR_ZERO;
configInfo.colorBlendAttachment.colorBlendOp = VK_BLEND_OP_ADD;
configInfo.colorBlendAttachment.srcAlphaBlendFactor = VK_BLEND_FACTOR_ONE;
configInfo.colorBlendAttachment.dstAlphaBlendFactor = VK_BLEND_FACTOR_ZERO;
configInfo.colorBlendAttachment.alphaBlendOp = VK_BLEND_OP_ADD;
configInfo.colorBlendInfo.sType = VK_STRUCTURE_TYPE_PIPELINE_COLOR_BLEND_STATE_CREATE_INFO;
configInfo.colorBlendInfo.logicOpEnable = VK_FALSE;
configInfo.colorBlendInfo.logicOp = VK_LOGIC_OP_COPY;
configInfo.colorBlendInfo.attachmentCount = 1;
configInfo.colorBlendInfo.pAttachments = &configInfo.colorBlendAttachment;
configInfo.colorBlendInfo.blendConstants[0] = 0.0f;
configInfo.colorBlendInfo.blendConstants[1] = 0.0f;
configInfo.colorBlendInfo.blendConstants[2] = 0.0f;
configInfo.colorBlendInfo.blendConstants[3] = 0.0f;
configInfo.depthStencilInfo.sType = VK_STRUCTURE_TYPE_PIPELINE_DEPTH_STENCIL_STATE_CREATE_INFO;
configInfo.depthStencilInfo.depthTestEnable = VK_TRUE;
configInfo.depthStencilInfo.depthWriteEnable = VK_TRUE;
configInfo.depthStencilInfo.depthCompareOp = VK_COMPARE_OP_LESS;
configInfo.depthStencilInfo.depthBoundsTestEnable = VK_FALSE;
configInfo.depthStencilInfo.minDepthBounds = 0.0f;
configInfo.depthStencilInfo.maxDepthBounds = 1.0f;
configInfo.depthStencilInfo.stencilTestEnable = VK_FALSE;
configInfo.depthStencilInfo.front = {};
configInfo.depthStencilInfo.back = {};
return configInfo;
}
}