create graphics pipeline ...

CMakeLists.txt

@@ -5,3 +5,5 @@ set(CMAKE_CXX_STANDARD 26)
 
 add_executable(${PROJECT_NAME} main.cpp)
 target_link_libraries(${PROJECT_NAME} PUBLIC vulkan glfw)
+
+file(COPY shaders DESTINATION ${PROJECT_BINARY_DIR}/)

main.cpp

@@ -1,12 +1,13 @@
 #define GLFW_INCLUDE_VULKAN
 
-#include <cstring>
-#include "GLFW/glfw3.h"
+#include <GLFW/glfw3.h>
 
-#include "iostream"
-#include "stdexcept"
-#include "cstdlib"
-#include "vector"
+#include <iostream>
+#include <stdexcept>
+#include <cstdlib>
+#include <vector>
+#include <cstring>
+#include <fstream>
 
 const std::vector<const char*> deviceExtensions = {
   VK_KHR_SWAPCHAIN_EXTENSION_NAME,
@@ -52,6 +53,8 @@ private:
     getQueues();
     createSwapChain();
     createSwapChainImageViews();
+    createRenderPass();
+    createGraphicsPipeline();
   }
 
   void mainLoop() {
@@ -61,7 +64,11 @@ private:
   }
 
   void cleanup() {
+    vkDestroyRenderPass(mDevice, mGraphicsRenderPass, nullptr);
+
+    destroyGraphicsPipeline();
     destroySwapChainImageViews();
+
     vkDestroySwapchainKHR(mDevice, mSwapChain, nullptr);
     vkDestroyDevice(mDevice, nullptr);
     vkDestroySurfaceKHR(mInstance, mSurface, nullptr);
@@ -416,6 +423,219 @@ private:
     }
   }
 
+  void createGraphicsPipeline() {
+    std::vector<char> vertShaderByteCode = readFile("bin/vert.spv");
+    mShaderModuleVert = createShaderModule(vertShaderByteCode);
+
+    VkPipelineShaderStageCreateInfo vertShaderStageCreateInfo {
+      .sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO,
+      .stage = VK_SHADER_STAGE_VERTEX_BIT,
+      .module = mShaderModuleVert,
+      .pName = "main",
+    };
+
+    std::vector<char> fragShaderByteCode = readFile("bin/frag.spv");
+    mShaderModuleFrag = createShaderModule(fragShaderByteCode);
+
+    VkPipelineShaderStageCreateInfo fragShaderStageCreateInfo {
+      .sType = VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO,
+      .stage = VK_SHADER_STAGE_FRAGMENT_BIT,
+      .module = mShaderModuleFrag,
+      .pName = "main",
+    };
+
+    VkPipelineShaderStageCreateInfo shaderStageCreateInfos[] = {
+        vertShaderStageCreateInfo,
+        fragShaderStageCreateInfo
+    };
+
+    std::vector<VkDynamicState> dynamicStates = {
+      VK_DYNAMIC_STATE_VIEWPORT,
+      VK_DYNAMIC_STATE_SCISSOR,
+    };
+
+    VkPipelineDynamicStateCreateInfo dynamicStateCreateInfo = {
+      .sType = VK_STRUCTURE_TYPE_PIPELINE_DYNAMIC_STATE_CREATE_INFO,
+      .dynamicStateCount = (uint32_t) dynamicStates.size(),
+      .pDynamicStates = dynamicStates.data(),
+    };
+
+    VkPipelineVertexInputStateCreateInfo vertexInputStateCreateInfo {
+      .sType = VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO,
+      .vertexBindingDescriptionCount = 0,
+      .vertexAttributeDescriptionCount = 0,
+    };
+
+    VkPipelineInputAssemblyStateCreateInfo inputAssemblyStateCreateInfo {
+      .sType = VK_STRUCTURE_TYPE_PIPELINE_INPUT_ASSEMBLY_STATE_CREATE_INFO,
+      .topology = VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST,
+      .primitiveRestartEnable = VK_FALSE,
+    };
+
+    VkViewport viewport {
+      .x = 0,
+      .y = 0,
+      .width = (float) mSwapChainExtent.width,
+      .height = (float) mSwapChainExtent.height,
+      .minDepth = 0.f,
+      .maxDepth = 1.f,
+    };
+
+    VkRect2D scissor {
+      .offset = { 0, 0 },
+      .extent = mSwapChainExtent,
+    };
+
+    VkPipelineViewportStateCreateInfo viewportState {
+      .sType = VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_STATE_CREATE_INFO,
+      .viewportCount = 1,
+      .pViewports = &viewport,
+      .scissorCount = 1,
+      .pScissors = &scissor,
+    };
+
+    VkPipelineRasterizationStateCreateInfo rasterizationStateCreateInfo {
+      .sType = VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_STATE_CREATE_INFO,
+      .depthClampEnable = VK_FALSE,
+      .rasterizerDiscardEnable = VK_FALSE,
+      .polygonMode = VK_POLYGON_MODE_FILL,
+      .cullMode = VK_CULL_MODE_BACK_BIT,
+      .frontFace = VK_FRONT_FACE_CLOCKWISE,
+
+      .depthBiasEnable = VK_FALSE,
+      .depthBiasConstantFactor = 0.f,
+      .depthBiasClamp = 0.f,
+      .depthBiasSlopeFactor = 0.f,
+
+      .lineWidth = 1,
+    };
+
+    VkPipelineMultisampleStateCreateInfo multisampleStateCreateInfo {
+      .sType = VK_STRUCTURE_TYPE_PIPELINE_MULTISAMPLE_STATE_CREATE_INFO,
+      .rasterizationSamples = VK_SAMPLE_COUNT_1_BIT,
+      .sampleShadingEnable = VK_FALSE,
+    };
+
+    VkPipelineColorBlendAttachmentState colorBlendAttachmentState {
+        .blendEnable = VK_FALSE,
+        .colorWriteMask = (VK_COLOR_COMPONENT_R_BIT | VK_COLOR_COMPONENT_G_BIT | VK_COLOR_COMPONENT_B_BIT |
+                           VK_COLOR_COMPONENT_A_BIT),
+    };
+
+    VkPipelineColorBlendStateCreateInfo colorBlendStateCreateInfo {
+      .sType = VK_STRUCTURE_TYPE_PIPELINE_COLOR_BLEND_STATE_CREATE_INFO,
+      .logicOpEnable = VK_FALSE,
+      .attachmentCount = 1,
+      .pAttachments = &colorBlendAttachmentState,
+    };
+
+
+    VkPipelineLayoutCreateInfo pipelineLayoutCreateInfo {
+      .sType = VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO,
+    };
+
+    if (vkCreatePipelineLayout(mDevice, &pipelineLayoutCreateInfo, nullptr, &mGraphicsPipelineLayout) != VK_SUCCESS) {
+      throw std::runtime_error("failed to create pipeline layout");
+    }
+
+    VkGraphicsPipelineCreateInfo graphicsPipelineCreateInfo {
+      .sType = VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO,
+      .stageCount = 1,
+      .pStages = shaderStageCreateInfos,
+      .pVertexInputState = &vertexInputStateCreateInfo,
+      .pInputAssemblyState = &inputAssemblyStateCreateInfo,
+      .pViewportState = &viewportState,
+      .pRasterizationState = &rasterizationStateCreateInfo,
+      .pMultisampleState = &multisampleStateCreateInfo,
+      .pColorBlendState = &colorBlendStateCreateInfo,
+      .pDynamicState = &dynamicStateCreateInfo,
+      .layout = mGraphicsPipelineLayout,
+      .renderPass = mGraphicsRenderPass,
+      .subpass = 0,
+    };
+
+    if (vkCreateGraphicsPipelines(mDevice, nullptr, 1, &graphicsPipelineCreateInfo, nullptr, &mGraphicsPipeline) != VK_SUCCESS) {
+      throw std::runtime_error("failed to create graphics pipeline");
+    }
+  }
+
+  void createRenderPass() {
+    VkAttachmentDescription colorAttachment {
+      .format = mSwapChainFormat,
+      .samples = VK_SAMPLE_COUNT_1_BIT,
+      .loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR,
+      .storeOp = VK_ATTACHMENT_STORE_OP_STORE,
+      .stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE,
+      .stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE,
+      .initialLayout = VK_IMAGE_LAYOUT_UNDEFINED,
+      .finalLayout = VK_IMAGE_LAYOUT_PRESENT_SRC_KHR,
+    };
+
+    VkAttachmentReference colorAttachmentReference {
+      .attachment = 0,
+      .layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
+    };
+
+    VkSubpassDescription subpassDescription {
+      .pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS,
+      .colorAttachmentCount = 1,
+      .pColorAttachments = &colorAttachmentReference,
+    };
+
+    VkRenderPassCreateInfo renderPassCreateInfo {
+      .sType = VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO,
+      .attachmentCount = 1,
+      .pAttachments = &colorAttachment,
+      .subpassCount = 1,
+      .pSubpasses = &subpassDescription,
+    };
+
+    if (vkCreateRenderPass(mDevice, &renderPassCreateInfo, nullptr, &mGraphicsRenderPass) != VK_SUCCESS) {
+      throw std::runtime_error("failed to create render pass");
+    }
+  }
+
+  void destroyGraphicsPipeline() {
+    vkDestroyShaderModule(mDevice, mShaderModuleVert, nullptr);
+    vkDestroyShaderModule(mDevice, mShaderModuleFrag, nullptr);
+    vkDestroyPipelineLayout(mDevice, mGraphicsPipelineLayout, nullptr);
+    vkDestroyPipeline(mDevice, mGraphicsPipeline, nullptr);
+  }
+
+  VkShaderModule createShaderModule(const std::vector<char>& bytecode) {
+    VkShaderModuleCreateInfo createInfo {
+      .sType = VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO,
+      .codeSize = (uint32_t) bytecode.size(),
+      .pCode = (uint32_t*) bytecode.data(),
+    };
+
+    VkShaderModule shaderModule;
+
+    if (vkCreateShaderModule(mDevice, &createInfo, nullptr, &shaderModule) != VK_SUCCESS) {
+      throw std::runtime_error("cannot create shader module");
+    }
+
+    return shaderModule;
+  }
+
+  static std::vector<char> readFile(const std::string& fileName) {
+    std::ifstream file(fileName, std::ios::ate | std::ios::binary);
+
+    if (!file.is_open()) {
+      throw std::runtime_error("cannot open file");
+    }
+
+    size_t fileSize = (size_t) file.tellg();
+    std::vector<char> buffer(fileSize);
+
+    file.seekg(0);
+    file.read(buffer.data(), (std::streamsize) fileSize);
+
+    file.close();
+
+    return buffer;
+  }
+
 private:
   GLFWwindow* mWindow = nullptr;
 
@@ -430,14 +650,18 @@ private:
   VkQueue mPresentQueue = VK_NULL_HANDLE;
 
   VkSurfaceKHR mSurface = VK_NULL_HANDLE;
-
   VkSwapchainKHR mSwapChain = VK_NULL_HANDLE;
-
   VkFormat mSwapChainFormat {};
   VkExtent2D mSwapChainExtent {};
-
   std::vector<VkImage> mSwapChainImages;
   std::vector<VkImageView> mSwapChainImageViews;
+
+
+  VkPipeline mGraphicsPipeline = VK_NULL_HANDLE;
+  VkShaderModule mShaderModuleVert = VK_NULL_HANDLE;
+  VkShaderModule mShaderModuleFrag = VK_NULL_HANDLE;
+  VkRenderPass mGraphicsRenderPass = VK_NULL_HANDLE;
+  VkPipelineLayout mGraphicsPipelineLayout {}; // no uniforms used in the shader
 };
 
 int main() {

shaders/compile.sh

@@ -0,0 +1,4 @@
+mkdir ../bin
+
+glslc shader.vert -o ../bin/vert.spv
+glslc shader.frag -o ../bin/frag.spv

shaders/shader.frag

@@ -0,0 +1,8 @@
+#version 450
+
+layout(location = 0) in vec3 vertexColor;
+layout(location = 0) out vec4 outColor;
+
+void main() {
+    outColor = vec4(vertexColor, 1.f);
+}

shaders/shader.vert

@@ -0,0 +1,20 @@
+#version 450
+
+vec2 positions[3] = vec2[](
+    vec2(0.0, -0.5),
+    vec2(0.5, 0.5),
+    vec2(-0.5, 0.5)
+);
+
+vec3 colors[3] = vec3[](
+    vec3(1.0, 0.0, 0.0),
+    vec3(0.0, 1.0, 0.0),
+    vec3(0.0, 0.0, 1.0)
+);
+
+layout(location = 0) out vec3 fragColor;
+
+void main() {
+    gl_Position = vec4(positions[gl_VertexIndex], 0.0, 1.0);
+    fragColor = colors[gl_VertexIndex];
+}