From d30b37bfbda61ce0057fb11f550f237245164a5b Mon Sep 17 00:00:00 2001
From: Grayson Riffe <grayson@graysonriffe.com>
Date: Tue, 11 Feb 2025 19:45:47 -0600
Subject: [PATCH] Create command pool and allocate command buffer

---
 .../src/client/render/RenderEngine.cpp        | 21 +++++++++++++++++++
 NothinFancy/src/client/render/RenderEngine.h  |  5 +++++
 2 files changed, 26 insertions(+)

diff --git a/NothinFancy/src/client/render/RenderEngine.cpp b/NothinFancy/src/client/render/RenderEngine.cpp
index eab5951..dfe7465 100644
--- a/NothinFancy/src/client/render/RenderEngine.cpp
+++ b/NothinFancy/src/client/render/RenderEngine.cpp
@@ -25,6 +25,8 @@ namespace nf::client::render {
         , m_swapchainFramebuffers()
         , m_pipelineLayoutOutput()
         , m_pipelineOutput()
+        , m_commandPool()
+        , m_commandBuffer()
     {
         NFLog("Initializing render engine");
         m_window->setDisplay(m_display);
@@ -36,6 +38,7 @@ namespace nf::client::render {
         createSwapchain();
         createOutputRenderPass();
         createOutputPipeline();
+        createCommandBuffer();
 
         m_window->show();
     }
@@ -377,7 +380,25 @@ namespace nf::client::render {
         }
     }
 
+    void RenderEngine::createCommandBuffer() {
+        VkCommandPoolCreateInfo commandPoolCI = { VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO };
+        commandPoolCI.flags = VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT;
+        commandPoolCI.queueFamilyIndex = m_queueFIGraphics;
+
+        if (vkCreateCommandPool(m_device, &commandPoolCI, nullptr, &m_commandPool) != VK_SUCCESS)
+            NFError("Could not create command pool.");
+
+        VkCommandBufferAllocateInfo commandBufferAI = { VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO };
+        commandBufferAI.commandPool = m_commandPool;
+        commandBufferAI.commandBufferCount = 1;
+
+        if (vkAllocateCommandBuffers(m_device, &commandBufferAI, &m_commandBuffer) != VK_SUCCESS)
+            NFError("Could not create command buffer.");
+    }
+
     RenderEngine::~RenderEngine() {
+        vkDestroyCommandPool(m_device, m_commandPool, nullptr);
+
         for (int i = 0; i < m_swapchainFramebuffers.size(); i++)
             vkDestroyFramebuffer(m_device, m_swapchainFramebuffers[i], nullptr);
 
diff --git a/NothinFancy/src/client/render/RenderEngine.h b/NothinFancy/src/client/render/RenderEngine.h
index 2cc6631..87c80fb 100644
--- a/NothinFancy/src/client/render/RenderEngine.h
+++ b/NothinFancy/src/client/render/RenderEngine.h
@@ -18,6 +18,7 @@ namespace nf::client::render {
         void createSwapchain();
         void createOutputRenderPass();
         void createOutputPipeline();
+        void createCommandBuffer();
 
         std::shared_ptr<Window> m_window;
         DisplayConfig m_display;
@@ -41,5 +42,9 @@ namespace nf::client::render {
         // Pipelines
         VkPipelineLayout m_pipelineLayoutOutput;
         VkPipeline m_pipelineOutput;
+
+        // Command buffers
+        VkCommandPool m_commandPool;
+        VkCommandBuffer m_commandBuffer;
     };
 }