src/main.cpp: Implement RenderPass

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

1 files changed, 39 insertions, 0 deletions

diff --git a/src/main.cpp b/src/main.cpp
index c558af8..fd444f3 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -29,6 +29,7 @@ private:
 
     VDeleter<VkInstance> instance {vkDestroyInstance};
     VDeleter<VkSurfaceKHR> surface{instance, vkDestroySurfaceKHR};
+    VDeleter<VkRenderPass> renderPass{device, vkDestroyRenderPass};
 
     VkPhysicalDevice physicalDevice = VK_NULL_HANDLE;
     VDeleter<VkDevice> device{vkDestroyDevice};
@@ -87,9 +88,47 @@ private:
 	    createLogicalDevice();
 	    createSwapChain();
 	    createImageViews();
+	    createRenderPass();
 	    createGraphicsPipeline();
     }
 
+    void createRenderPass() {
+	    VkAttachmentDescription colorAttachment = {};
+	    colorAttachment.format = swapChainImageFormat;
+	    colorAttachment.samples = VK_SAMPLE_COUNT_1_BIT;
+
+	    // no multisampling needed, use one sample
+	    colorAttachment.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
+	    colorAttachment.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
+
+	    colorAttachment.stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
+	    colorAttachment.stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
+
+	    colorAttachment.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
+	    colorAttachment.finalLayout = VK_IMAGE_LAYOUT_PRESENT_SRC_KHR;
+
+	    // subpasses
+	    VkAttachmentReference colorAttachmentRef = {};
+	    colorAttachmentRef.attachment = 0;
+	    colorAttachmentRef.layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
+
+	    VkSubpassDescription subpass = {};
+	    subpass.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
+	    subpass.colorAttachmentCount = 1;
+	    subpass.pColorAttachments = &colorAttachmentRef;
+
+	    // render pass
+	    VkRenderPassCreateInfo renderPassInfo = {};
+	    renderPassInfo.sType = VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO;
+	    renderPassInfo.attachmentCount = 1;
+	    renderPassInfo.pAttachments = &colorAttachment;
+	    renderPassInfo.subpassCount = 1;
+	    renderPassInfo.pSubpasses = &subpass;
+
+	    if (vkCreateRenderPass(device, &renderPassInfo, nullptr, renderPass.replace()) != VK_SUCCESS)
+		    throw std::runtime_error("failed to create render pass!");
+    }
+
     void createGraphicsPipeline() {
 	    auto vertShaderCode = readFile("shaders/vert.spv");
 	    auto fragShaderCode = readFile("shaders/frag.spv");