Add vertex buffer

Core/Core/RenderEngine.cpp

@@ -73,6 +73,30 @@ bool RenderEngine::QueueFamilyIndices::is_complete()
     return graphycs_family.has_value() && present_family.has_value();
 }
 
+VkVertexInputBindingDescription RenderEngine::Vertex::get_binding_description()
+{
+    VkVertexInputBindingDescription description{};
+    description.binding = 0;
+    description.stride = sizeof(Vertex);
+    description.inputRate = VK_VERTEX_INPUT_RATE_VERTEX;
+    return description;
+}
+
+std::array<VkVertexInputAttributeDescription, 2> RenderEngine::Vertex::get_vertex_attribute_descriptions()
+{
+    std::array<VkVertexInputAttributeDescription, 2> descriptions;
+    descriptions[0].binding = 0;
+    descriptions[0].location = 0;
+    descriptions[0].format = VK_FORMAT_R32G32_SFLOAT;
+    descriptions[0].offset = offsetof(Vertex, pos);
+    descriptions[1].binding = 0;
+    descriptions[1].location = 1;
+    descriptions[1].format = VK_FORMAT_R32G32B32_SFLOAT;
+    descriptions[1].offset = offsetof(Vertex, color);
+    
+    return descriptions;
+}
+
 bool RenderEngine::is_device_suitable(VkPhysicalDevice device, VkSurfaceKHR surface)
 {
     VkPhysicalDeviceProperties device_properties;
@@ -446,12 +470,15 @@ void RenderEngine::create_graphics_pipeline()
     dynamic_state_info.dynamicStateCount = static_cast<uint32_t>(dynamic_states.size());
     dynamic_state_info.pDynamicStates = dynamic_states.data();
 
+    VkVertexInputBindingDescription binding_description = Vertex::get_binding_description();
+    std::array<VkVertexInputAttributeDescription, 2> attribute_descriptions = Vertex::get_vertex_attribute_descriptions();
+    
     VkPipelineVertexInputStateCreateInfo vertex_input_info{};
     vertex_input_info.sType = VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO;
-    vertex_input_info.vertexAttributeDescriptionCount = 0;
+    vertex_input_info.vertexBindingDescriptionCount = 1;
-    vertex_input_info.pVertexAttributeDescriptions = nullptr;
+    vertex_input_info.pVertexBindingDescriptions = &binding_description;
-    vertex_input_info.vertexBindingDescriptionCount = 0;
+    vertex_input_info.vertexAttributeDescriptionCount = static_cast<uint32_t>(attribute_descriptions.size());
-    vertex_input_info.pVertexBindingDescriptions = nullptr;
+    vertex_input_info.pVertexAttributeDescriptions = attribute_descriptions.data();
 
     VkPipelineInputAssemblyStateCreateInfo input_assembly_info{};
     input_assembly_info.sType = VK_STRUCTURE_TYPE_PIPELINE_INPUT_ASSEMBLY_STATE_CREATE_INFO;
@@ -535,7 +562,7 @@ void RenderEngine::create_graphics_pipeline()
     graphics_pipeline_info.basePipelineHandle = nullptr;
     graphics_pipeline_info.basePipelineIndex = -1;
 
-    VK_CHECK(vkCreateGraphicsPipelines(device_, nullptr, 1, &graphics_pipeline_info, nullptr, &graphycs_pipeline_));
+    VK_CHECK(vkCreateGraphicsPipelines(device_, nullptr, 1, &graphics_pipeline_info, nullptr, &graphics_pipeline_));
     
     vkDestroyShaderModule(device_, vertex_shader, nullptr);
     vkDestroyShaderModule(device_, fragment_shader, nullptr);
@@ -572,6 +599,47 @@ void RenderEngine::create_command_pool()
     VK_CHECK(vkCreateCommandPool(device_, &command_pool_info, nullptr, &command_pool_));
 }
 
+uint32_t RenderEngine::find_memory_type(uint32_t typeFilter, VkMemoryPropertyFlags properties)
+{
+    VkPhysicalDeviceMemoryProperties memory_properties{};
+    vkGetPhysicalDeviceMemoryProperties(physical_device_, &memory_properties);
+
+    for (uint32_t i = 0; i < memory_properties.memoryTypeCount; ++i)
+    {
+        if (typeFilter & (1 << i) && (memory_properties.memoryTypes[i].propertyFlags & properties) == properties)
+            return i;
+    }
+    
+    throw std::runtime_error("failed to find suitable memory type!");
+}
+
+void RenderEngine::allocate_vertex_buffer()
+{
+    VkBufferCreateInfo buffer_info{};
+    buffer_info.sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO;
+    buffer_info.size = sizeof(vertices[0]) * vertices.size();
+    buffer_info.usage = VK_BUFFER_USAGE_VERTEX_BUFFER_BIT;
+    buffer_info.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
+
+    VK_CHECK(vkCreateBuffer(device_, &buffer_info, nullptr, &vertex_buffer_));
+
+    VkMemoryRequirements requirements{};
+    vkGetBufferMemoryRequirements(device_, vertex_buffer_, &requirements);
+
+    VkMemoryAllocateInfo allocate_info{};
+    allocate_info.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO;
+    allocate_info.allocationSize = requirements.size;
+    allocate_info.memoryTypeIndex = find_memory_type(requirements.memoryTypeBits, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT);
+
+    VK_CHECK(vkAllocateMemory(device_, &allocate_info, nullptr, &vertex_buffer_memory_));
+    VK_CHECK(vkBindBufferMemory(device_, vertex_buffer_, vertex_buffer_memory_, 0));
+
+    void* data;
+    VK_CHECK(vkMapMemory(device_, vertex_buffer_memory_, 0, buffer_info.size, 0, &data));
+    memcpy(data, vertices.data(), (size_t) buffer_info.size);
+    vkUnmapMemory(device_, vertex_buffer_memory_);
+}
+
 void RenderEngine::allocate_command_buffers()
 {
     command_buffers_.resize(swapchain_images_.size());
@@ -623,7 +691,11 @@ void RenderEngine::record_command_buffer(VkCommandBuffer command_buffer, uint32_
     render_pass_begin_info.pClearValues = &clear_color;
     vkCmdBeginRenderPass(command_buffer, &render_pass_begin_info, VK_SUBPASS_CONTENTS_INLINE);
 
-    vkCmdBindPipeline(command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS, graphycs_pipeline_);
+    vkCmdBindPipeline(command_buffer, VK_PIPELINE_BIND_POINT_GRAPHICS, graphics_pipeline_);
+
+    VkBuffer vertex_buffers[] = {vertex_buffer_};
+    VkDeviceSize offset[] = {0};
+    vkCmdBindVertexBuffers(command_buffer, 0, 1, vertex_buffers, offset);
 
     VkViewport viewport{};
     viewport.x = 0.0f;
@@ -639,7 +711,7 @@ void RenderEngine::record_command_buffer(VkCommandBuffer command_buffer, uint32_
     scissor.extent = swapchain_extent_;
     vkCmdSetScissor(command_buffer, 0, 1, &scissor);
 
-    vkCmdDraw(command_buffer, 3, 1, 0, 0);
+    vkCmdDraw(command_buffer, static_cast<uint32_t>(vertices.size()), 1, 0, 0);
 
     vkCmdEndRenderPass(command_buffer);
     VK_CHECK(vkEndCommandBuffer(command_buffer));
@@ -705,6 +777,7 @@ window_(window)
     create_graphics_pipeline();
     create_framebuffers();
     create_command_pool();
+    allocate_vertex_buffer();
     allocate_command_buffers();
     create_sync_objects();
 }
@@ -712,6 +785,12 @@ window_(window)
 RenderEngine::~RenderEngine()
 {
     vkDeviceWaitIdle(device_);
+
+    if (vertex_buffer_memory_ != VK_NULL_HANDLE)
+        vkFreeMemory(device_, vertex_buffer_memory_, nullptr);
+
+    if (vertex_buffer_ != VK_NULL_HANDLE)
+        vkDestroyBuffer(device_, vertex_buffer_, nullptr);
     
     for (auto& i : image_available_semaphores_)
         vkDestroySemaphore(device_, i, nullptr);
@@ -731,8 +810,8 @@ RenderEngine::~RenderEngine()
     for (auto& i : framebuffers_)
         vkDestroyFramebuffer(device_, i, nullptr);
     
-    if (graphycs_pipeline_ != VK_NULL_HANDLE)
+    if (graphics_pipeline_ != VK_NULL_HANDLE)
-        vkDestroyPipeline(device_, graphycs_pipeline_, nullptr);
+        vkDestroyPipeline(device_, graphics_pipeline_, nullptr);
     
     if (pipeline_layout_ != VK_NULL_HANDLE)
         vkDestroyPipelineLayout(device_, pipeline_layout_, nullptr);

Core/Core/RenderEngine.h

@@ -1,13 +1,15 @@
 #pragma once
 
+#include <array>
 #include <vector>
 #include <optional>
+#include <string>
 
 #define GLFW_INCLUDE_VULKAN
-#include <string>
 #include <GLFW/glfw3.h>
 
 #include <vulkan/vulkan.h>
+#include <glm/glm.hpp>
 
 #ifdef _DEBUG
 #include <assert.h>
@@ -33,6 +35,25 @@ class RenderEngine
         std::vector<VkPresentModeKHR> present_modes;
     };
 
+#pragma region Experemental
+    struct Vertex
+    {
+        glm::vec2 pos;
+        glm::vec3 color;
+        static VkVertexInputBindingDescription get_binding_description();
+        static std::array<VkVertexInputAttributeDescription, 2> get_vertex_attribute_descriptions();
+    };
+    const std::vector<Vertex> vertices = {
+        {{0.0f, -0.5f}, {1.0f, 0.0f, 0.0f}},
+        {{0.5f, 0.5f}, {0.0f, 1.0f, 0.0f}},
+        {{-0.5f, 0.5f}, {0.0f, 0.0f, 1.0f}}
+    };
+    VkBuffer vertex_buffer_ = VK_NULL_HANDLE;
+    VkDeviceMemory vertex_buffer_memory_ = VK_NULL_HANDLE;
+    uint32_t find_memory_type(uint32_t typeFilter, VkMemoryPropertyFlags properties);
+    void allocate_vertex_buffer();
+#pragma endregion
+
     static const std::vector<const char*> deviceExtensions;
 
     int current_frame_ = 0;
@@ -52,7 +73,7 @@ class RenderEngine
     std::vector<VkImageView> swapchain_image_views_;
     VkRenderPass render_pass_ = VK_NULL_HANDLE;
     VkPipelineLayout pipeline_layout_ = VK_NULL_HANDLE;
-    VkPipeline graphycs_pipeline_ = VK_NULL_HANDLE;
+    VkPipeline graphics_pipeline_ = VK_NULL_HANDLE;
     std::vector<VkFramebuffer> framebuffers_;
     VkCommandPool command_pool_ = VK_NULL_HANDLE;
     std::vector<VkCommandBuffer> command_buffers_;

TestGame/Shaders/vertex.vert

@@ -1,20 +1,12 @@
 #version 450
 
+layout(location = 0) in vec2 inPosition;
+layout(location = 1) in vec3 inColor;
+
 layout(location = 0) out vec3 fragColor;
 
-vec3 colors[3] = vec3[](
+void main()
-	vec3(1.0, 0.0, 0.0),
+{
-	vec3(0.0, 1.0, 0.0),
+	gl_Position = vec4(inPosition, 0.0, 1.0);
-	vec3(0.0, 0.0, 1.0)
+	fragColor = inColor;
-);
-
-vec2 positions[3] = vec2[](
-	vec2(0.0, -0.5),
-	vec2(0.5, 0.5),
-	vec2(-0.5, 0.5)
-);
-
-void main() {
-	gl_Position = vec4(positions[gl_VertexIndex], 0.0, 1.0);
-	fragColor = colors[gl_VertexIndex];
 }