Multisampling implementation using the max samples the GPU supports

src/agnosiaimgui.cpp

@@ -0,0 +1,19 @@
+#include "agnosiaimgui.h"
+#include "imgui.h"
+
+namespace agnosia_imgui {
+
+struct {
+} ImGuiSettings;
+
+void Gui::drawTabs() {
+  if (ImGui::BeginTabBar("MainTabBar", ImGuiTabBarFlags_Reorderable)) {
+    if (ImGui::BeginTabItem("Graphics Pipeline")) {
+      ImGui::Text("Test");
+      ImGui::EndTabItem();
+    }
+
+    ImGui::EndTabBar();
+  }
+}
+} // namespace agnosia_imgui

src/agnosiaimgui.h

@@ -0,0 +1,11 @@
+#pragma once
+#include "global.h"
+#include "imgui.h"
+#include <map>
+
+namespace agnosia_imgui {
+class Gui {
+public:
+  static void drawTabs();
+};
+} // namespace agnosia_imgui

src/devicelibrary.cpp

@@ -1,4 +1,5 @@
 #include "devicelibrary.h"
+#include "global.h"
 
 namespace device_libs {
 
@@ -162,6 +163,36 @@ VkExtent2D chooseSwapExtent(const VkSurfaceCapabilitiesKHR &capabilities,
     return actualExtent;
   }
 }
+
+VkSampleCountFlagBits getMaxUsableSampleCount() {
+  VkPhysicalDeviceProperties physicalDeviceProps;
+  VkSampleCountFlags maxCounts;
+  vkGetPhysicalDeviceProperties(Global::physicalDevice, &physicalDeviceProps);
+
+  VkSampleCountFlags counts =
+      physicalDeviceProps.limits.framebufferColorSampleCounts &
+      physicalDeviceProps.limits.framebufferDepthSampleCounts;
+  if (counts & VK_SAMPLE_COUNT_64_BIT) {
+    return VK_SAMPLE_COUNT_64_BIT;
+  }
+  if (counts & VK_SAMPLE_COUNT_32_BIT) {
+    return VK_SAMPLE_COUNT_32_BIT;
+  }
+  if (counts & VK_SAMPLE_COUNT_16_BIT) {
+    return VK_SAMPLE_COUNT_16_BIT;
+  }
+  if (counts & VK_SAMPLE_COUNT_8_BIT) {
+    return VK_SAMPLE_COUNT_8_BIT;
+  }
+  if (counts & VK_SAMPLE_COUNT_4_BIT) {
+    return VK_SAMPLE_COUNT_4_BIT;
+  }
+  if (counts & VK_SAMPLE_COUNT_2_BIT) {
+    return VK_SAMPLE_COUNT_2_BIT;
+  }
+
+  return VK_SAMPLE_COUNT_1_BIT;
+}
 // --------------------------------------- External Functions
 // ----------------------------------------- //
 void DeviceControl::pickPhysicalDevice(VkInstance &instance) {
@@ -180,6 +211,7 @@ void DeviceControl::pickPhysicalDevice(VkInstance &instance) {
       // Once we have buttons or such, maybe ask the user or write a config file
       // for which GPU to use?
       Global::physicalDevice = device;
+      Global::perPixelSampleCount = getMaxUsableSampleCount();
       break;
     }
   }
@@ -378,6 +410,7 @@ void DeviceControl::destroyImageViews() {
     vkDestroyImageView(Global::device, imageView, nullptr);
   }
 }
+
 // --------------------------------------- Getters & Setters
 // ------------------------------------------ //
 VkFormat *DeviceControl::getImageFormat() { return &swapChainImageFormat; }

src/entrypoint.cpp

@@ -1,5 +1,9 @@
 #include "entrypoint.h"
 #include "global.h"
+#include "graphics/texture.h"
+#include "imgui.h"
+#include "imgui_impl_glfw.h"
+#include "imgui_impl_vulkan.h"
 
 VkInstance vulkaninstance;
 
@@ -88,6 +92,7 @@ void initVulkan() {
   buffers_libs::Buffers::createDescriptorSetLayout();
   graphics_pipeline::Graphics::createGraphicsPipeline();
   graphics_pipeline::Graphics::createCommandPool();
+  texture_libs::Texture::createColorResources();
   texture_libs::Texture::createDepthResources();
   texture_libs::Texture::createTextureImage();
   texture_libs::Texture::createTextureImageView();
@@ -126,6 +131,10 @@ void cleanup() {
   render_present::Render::destroyFenceSemaphores();
   graphics_pipeline::Graphics::destroyCommandPool();
 
+  ImGui_ImplVulkan_Shutdown();
+  ImGui_ImplGlfw_Shutdown();
+  ImGui::DestroyContext();
+
   vkDestroyDevice(Global::device, nullptr);
   device_libs::DeviceControl::destroySurface(vulkaninstance);
   vkDestroyInstance(vulkaninstance, nullptr);

src/global.cpp

@@ -5,6 +5,7 @@ namespace Global {
 VkSurfaceKHR surface;
 VkDevice device;
 VkPhysicalDevice physicalDevice;
+VkSampleCountFlagBits perPixelSampleCount;
 VkSwapchainKHR swapChain;
 VkCommandPool commandPool;
 std::vector<VkCommandBuffer> commandBuffers;
@@ -16,6 +17,9 @@ std::vector<VkDescriptorSet> descriptorSets;
 uint32_t currentFrame = 0;
 VkImageView textureImageView;
 VkSampler textureSampler;
+VkImageView colorImageView;
+VkImage colorImage;
+VkDeviceMemory colorImageMemory;
 VkImageView depthImageView;
 VkImage depthImage;
 VkDeviceMemory depthImageMemory;

src/global.h

@@ -28,6 +28,7 @@ namespace Global {
 // enabled first, so that's one obvious global, as well as the glfw includes!
 
 extern VkPhysicalDevice physicalDevice;
+extern VkSampleCountFlagBits perPixelSampleCount;
 extern VkDevice device;
 
 extern VkCommandPool commandPool;
@@ -46,6 +47,10 @@ extern VkDescriptorSetLayout descriptorSetLayout;
 extern VkImageView textureImageView;
 extern VkSampler textureSampler;
 
+extern VkImage colorImage;
+extern VkImageView colorImageView;
+extern VkDeviceMemory colorImageMemory;
+
 extern VkImage depthImage;
 extern VkImageView depthImageView;
 extern VkDeviceMemory depthImageMemory;
@@ -53,8 +58,8 @@ extern VkDeviceMemory depthImageMemory;
 extern VkSwapchainKHR swapChain;
 extern std::vector<VkImageView> swapChainImageViews;
 
-const std::string MODEL_PATH = "assets/models/teapot.obj";
-const std::string TEXTURE_PATH = "assets/textures/checkermap.png";
+const std::string MODEL_PATH = "assets/models/viking_room.obj";
+const std::string TEXTURE_PATH = "assets/textures/viking_room.png";
 const uint32_t WIDTH = 800;
 const uint32_t HEIGHT = 600;
 const int MAX_FRAMES_IN_FLIGHT = 2;

src/graphics/graphicspipeline.cpp

@@ -2,6 +2,7 @@
 #include "imgui.h"
 #include "imgui_impl_vulkan.h"
 #include "texture.h"
+#include <vulkan/vulkan_core.h>
 
 namespace graphics_pipeline {
 
@@ -149,8 +150,7 @@ void Graphics::createGraphicsPipeline() {
   multisampling.sType =
       VK_STRUCTURE_TYPE_PIPELINE_MULTISAMPLE_STATE_CREATE_INFO;
   multisampling.sampleShadingEnable = VK_FALSE;
-  multisampling.rasterizationSamples = VK_SAMPLE_COUNT_1_BIT;
-
+  multisampling.rasterizationSamples = Global::perPixelSampleCount;
   // TODO: Document!
   VkPipelineDepthStencilStateCreateInfo depthStencil{};
   depthStencil.sType =
@@ -295,8 +295,11 @@ void Graphics::recordCommandBuffer(VkCommandBuffer commandBuffer,
 
   const VkRenderingAttachmentInfo colorAttachmentInfo{
       .sType = VK_STRUCTURE_TYPE_RENDERING_ATTACHMENT_INFO,
-      .imageView = Global::swapChainImageViews[imageIndex],
+      .imageView = Global::colorImageView,
       .imageLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
+      .resolveMode = VK_RESOLVE_MODE_AVERAGE_BIT,
+      .resolveImageView = Global::swapChainImageViews[imageIndex],
+      .resolveImageLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
       .loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR,
       .storeOp = VK_ATTACHMENT_STORE_OP_STORE,
       .clearValue = {.color = {0.0f, 0.0f, 0.0f, 1.0f}},
@@ -306,7 +309,7 @@ void Graphics::recordCommandBuffer(VkCommandBuffer commandBuffer,
       .imageView = Global::depthImageView,
       .imageLayout = VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL,
       .loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR,
-      .storeOp = VK_ATTACHMENT_STORE_OP_STORE,
+      .storeOp = VK_ATTACHMENT_STORE_OP_DONT_CARE,
       .clearValue = {.depthStencil = {1.0f, 0}},
   };
 

src/graphics/render.cpp

@@ -4,10 +4,9 @@
 #include "graphicspipeline.h"
 #include "render.h"
 #include "texture.h"
-#include <cstdint>
 #include <stdexcept>
-#include <vulkan/vulkan_core.h>
 
+#include "../agnosiaimgui.h"
 #include "imgui.h"
 #include "imgui_impl_glfw.h"
 #include "imgui_impl_vulkan.h"
@@ -19,6 +18,8 @@ std::vector<VkSemaphore> renderFinishedSemaphores;
 std::vector<VkFence> inFlightFences;
 VkDescriptorPool imGuiDescriptorPool;
 
+static float floatBar = 0.0f;
+
 void recreateSwapChain() {
   int width = 0, height = 0;
   glfwGetFramebufferSize(Global::window, &width, &height);
@@ -37,6 +38,7 @@ void recreateSwapChain() {
 
   device_libs::DeviceControl::createSwapChain(Global::window);
   device_libs::DeviceControl::createImageViews();
+  texture_libs::Texture::createColorResources();
   texture_libs::Texture::createDepthResources();
 }
 // At a high level, rendering in Vulkan consists of 5 steps:
@@ -123,28 +125,23 @@ void Render::drawImGui() {
   ImGui::NewFrame();
   // 2. Show a simple window that we create ourselves. We use a Begin/End pair
   // to create a named window.
-  {
-    static float f = 0.0f;
-    static int counter = 0;
 
-    ImGui::Begin("Agnosia Debug"); // Create a window called "Hello, world!" and
-                                   // append into it.
+  static int counter = 0;
 
-    ImGui::Text("This is some useful text."); // Display some text (you can use
-                                              // a format strings too)
-    ImGui::SliderFloat("float", &f, 0.0f,
-                       1.0f); // Edit 1 float using a slider from 0.0f to 1.0f
+  ImGui::Begin("Agnosia Debug"); // Create a window called "Hello, world!" and
+                                 // append into it.
 
-    if (ImGui::Button("Button")) // Buttons return true when clicked (most
-                                 // widgets return true when edited/activated)
-      counter++;
-    ImGui::SameLine();
-    ImGui::Text("counter = %d", counter);
+  ImGui::Text("This is some useful text."); // Display some text (you can use
+                                            // a format strings too)
+  ImGui::SliderFloat("float", &floatBar, 0.0f,
+                     1.0f); // Edit 1 float using a slider from 0.0f to 1.0f
+
+  agnosia_imgui::Gui::drawTabs();
+
+  ImGui::Text("Application average %.3f ms/frame (%.1f FPS)",
+              1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
+  ImGui::End();
 
-    ImGui::Text("Application average %.3f ms/frame (%.1f FPS)",
-                1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
-    ImGui::End();
-  }
   ImGui::Render();
 }
 #pragma info
@@ -202,6 +199,9 @@ void Render::destroyFenceSemaphores() {
   }
 }
 void Render::cleanupSwapChain() {
+  vkDestroyImageView(Global::device, Global::colorImageView, nullptr);
+  vkDestroyImage(Global::device, Global::colorImage, nullptr);
+  vkFreeMemory(Global::device, Global::colorImageMemory, nullptr);
   vkDestroyImageView(Global::device, Global::depthImageView, nullptr);
   vkDestroyImage(Global::device, Global::depthImage, nullptr);
   vkFreeMemory(Global::device, Global::depthImageMemory, nullptr);
@@ -273,6 +273,5 @@ void Render::init_imgui(VkInstance instance) {
   };
 
   ImGui_ImplVulkan_Init(&initInfo);
-
-} // namespace render_present
+}
 } // namespace render_present

src/graphics/render.h

@@ -10,5 +10,6 @@ public:
   static void cleanupSwapChain();
   static void init_imgui(VkInstance instance);
   static void drawImGui();
+  static float getFloatBar();
 };
 } // namespace render_present

src/graphics/texture.cpp

@@ -1,4 +1,3 @@
-#include <cstdint>
 #define STB_IMAGE_IMPLEMENTATION
 #include "texture.h"
 #include <stb/stb_image.h>
@@ -12,7 +11,8 @@ VkPipelineStageFlags destinationStage;
 
 namespace texture_libs {
 void createImage(uint32_t width, uint32_t height, uint32_t mipLevels,
-                 VkFormat format, VkImageTiling tiling, VkImageUsageFlags usage,
+                 VkSampleCountFlagBits sampleNum, VkFormat format,
+                 VkImageTiling tiling, VkImageUsageFlags usage,
                  VkMemoryPropertyFlags properties, VkImage &image,
                  VkDeviceMemory &imageMemory) {
   // This function specifies all the data in an image object, this is called
@@ -29,7 +29,7 @@ void createImage(uint32_t width, uint32_t height, uint32_t mipLevels,
   imageInfo.tiling = tiling;
   imageInfo.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
   imageInfo.usage = usage;
-  imageInfo.samples = VK_SAMPLE_COUNT_1_BIT;
+  imageInfo.samples = sampleNum;
   imageInfo.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
   imageInfo.mipLevels = mipLevels;
 
@@ -309,8 +309,8 @@ void Texture::createTextureImage() {
 
   stbi_image_free(pixels);
 
-  createImage(textureWidth, textureHeight, mipLevels, VK_FORMAT_R8G8B8A8_SRGB,
-              VK_IMAGE_TILING_OPTIMAL,
+  createImage(textureWidth, textureHeight, mipLevels, VK_SAMPLE_COUNT_1_BIT,
+              VK_FORMAT_R8G8B8A8_SRGB, VK_IMAGE_TILING_OPTIMAL,
               VK_IMAGE_USAGE_TRANSFER_SRC_BIT |
                   VK_IMAGE_USAGE_TRANSFER_DST_BIT | VK_IMAGE_USAGE_SAMPLED_BIT,
               VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, textureImage,
@@ -395,11 +395,24 @@ VkFormat Texture::findDepthFormat() {
        VK_FORMAT_D24_UNORM_S8_UINT},
       VK_IMAGE_TILING_OPTIMAL, VK_FORMAT_FEATURE_DEPTH_STENCIL_ATTACHMENT_BIT);
 }
+void Texture::createColorResources() {
+  VkFormat colorFormat = *device_libs::DeviceControl::getImageFormat();
+  VkExtent2D swapChainExtent = device_libs::DeviceControl::getSwapChainExtent();
+
+  createImage(swapChainExtent.width, swapChainExtent.height, 1,
+              Global::perPixelSampleCount, colorFormat, VK_IMAGE_TILING_OPTIMAL,
+              VK_IMAGE_USAGE_TRANSIENT_ATTACHMENT_BIT |
+                  VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT,
+              VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, Global::colorImage,
+              Global::colorImageMemory);
+  Global::colorImageView = device_libs::DeviceControl::createImageView(
+      Global::colorImage, colorFormat, VK_IMAGE_ASPECT_COLOR_BIT, 1);
+}
 void Texture::createDepthResources() {
   VkFormat depthFormat = findDepthFormat();
   VkExtent2D swapChainExtent = device_libs::DeviceControl::getSwapChainExtent();
-  createImage(swapChainExtent.width, swapChainExtent.height, 1, depthFormat,
-              VK_IMAGE_TILING_OPTIMAL,
+  createImage(swapChainExtent.width, swapChainExtent.height, 1,
+              Global::perPixelSampleCount, depthFormat, VK_IMAGE_TILING_OPTIMAL,
               VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT,
               VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, Global::depthImage,
               Global::depthImageMemory);

src/graphics/texture.h

@@ -1,20 +1,21 @@
 #pragma once
+#include "../devicelibrary.h"
 #include "../global.h"
 #include "buffers.h"
-#include "../devicelibrary.h"
+#include <cstdint>
 
 namespace texture_libs {
-  class Texture {
-    public:
-      static void createTextureImage();
-      static void createTextureImageView();
-      static void createTextureSampler();
-      static void destroyTextureImage();
-      static void destroyTextureSampler();
-      static VkFormat findDepthFormat();
-      static void createDepthResources();
-      
-      // ------------ Getters & Setters ------------ // 
-      static uint32_t getMipLevels();
-  };
-}
+class Texture {
+public:
+  static void createTextureImage();
+  static void createTextureImageView();
+  static void createTextureSampler();
+  static void destroyTextureImage();
+  static void destroyTextureSampler();
+  static VkFormat findDepthFormat();
+  static void createDepthResources();
+  static void createColorResources();
+  // ------------ Getters & Setters ------------ //
+  static uint32_t getMipLevels();
+};
+} // namespace texture_libs