src/main.cpp: Implement CommandPools && CommandBuffers

Signed-off-by: Edward O'Callaghan <funfunctor@folklore1984.net>

1 files changed, 57 insertions, 0 deletions

diff --git a/src/main.cpp b/src/main.cpp
index 31a0c14..2609358 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -47,6 +47,9 @@ private:
     std::vector<VDeleter<VkImageView>> swapChainImageViews;
     std::vector<VDeleter<VkFramebuffer>> swapChainFramebuffers;
 
+    VDeleter<VkCommandPool> commandPool{device, vkDestroyCommandPool};
+    std::vector<VkCommandBuffer> commandBuffers;
+
     struct QueueFamilyIndices {
 	    int graphicsFamily = -1;
 	    int presentFamily  = -1;
@@ -94,6 +97,60 @@ private:
 	    createRenderPass();
 	    createGraphicsPipeline();
 	    createFramebuffers();
+	    createCommandPool();
+	    createCommandBuffers();
+    }
+
+    void createCommandPool() {
+	    QueueFamilyIndices queueFamilyIndices = findQueueFamilies(physicalDevice);
+
+	    VkCommandPoolCreateInfo poolInfo = {};
+	    poolInfo.sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO;
+	    poolInfo.queueFamilyIndex = queueFamilyIndices.graphicsFamily;
+	    poolInfo.flags = 0; // Optional
+
+	    if (vkCreateCommandPool(device, &poolInfo, nullptr, commandPool.replace()) != VK_SUCCESS)
+		    throw std::runtime_error("failed to create command pool!");
+    }
+
+    void createCommandBuffers() {
+	    commandBuffers.resize(swapChainFramebuffers.size());
+
+	    VkCommandBufferAllocateInfo allocInfo = {};
+	    allocInfo.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO;
+	    allocInfo.commandPool = commandPool;
+	    allocInfo.level = VK_COMMAND_BUFFER_LEVEL_PRIMARY;
+	    allocInfo.commandBufferCount = (uint32_t) commandBuffers.size();
+
+	    if (vkAllocateCommandBuffers(device, &allocInfo, commandBuffers.data()) != VK_SUCCESS)
+		    throw std::runtime_error("failed to allocate command buffers!");
+
+	    for (size_t i = 0; i < commandBuffers.size(); i++) {
+		    VkCommandBufferBeginInfo beginInfo = {};
+		    beginInfo.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
+		    beginInfo.flags = VK_COMMAND_BUFFER_USAGE_SIMULTANEOUS_USE_BIT;
+
+		    vkBeginCommandBuffer(commandBuffers[i], &beginInfo);
+
+		    VkRenderPassBeginInfo renderPassInfo = {};
+		    renderPassInfo.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO;
+		    renderPassInfo.renderPass = renderPass;
+		    renderPassInfo.framebuffer = swapChainFramebuffers[i];
+		    renderPassInfo.renderArea.offset = {0, 0};
+		    renderPassInfo.renderArea.extent = swapChainExtent;
+
+		    VkClearValue clearColor = {0.0f, 0.0f, 0.0f, 1.0f};
+		    renderPassInfo.clearValueCount = 1;
+		    renderPassInfo.pClearValues = &clearColor;
+
+		    vkCmdBeginRenderPass(commandBuffers[i], &renderPassInfo, VK_SUBPASS_CONTENTS_INLINE);
+		    vkCmdBindPipeline(commandBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, graphicsPipeline);
+		    vkCmdDraw(commandBuffers[i], 3, 1, 0, 0);
+		    vkCmdEndRenderPass(commandBuffers[i]);
+
+		    if (vkEndCommandBuffer(commandBuffers[i]) != VK_SUCCESS)
+			    throw std::runtime_error("failed to record command buffer!");
+	    }
     }
 
     void createFramebuffers() {