From bab42dba2ae5381a41201c5ebb675bc29802b29e Mon Sep 17 00:00:00 2001
From: Jonathan Bradley <jcb@pikum.xyz>
Date: Tue, 22 Aug 2023 16:58:07 -0400
Subject: first pass add present render pass

---
 src/window.cpp | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

(limited to 'src/window.cpp')

diff --git a/src/window.cpp b/src/window.cpp
index 0d94c47..f073df7 100644
--- a/src/window.cpp
+++ b/src/window.cpp
@@ -1,3 +1,4 @@
+#include <vulkan/vulkan_core.h>
 #define GLFW_INCLUDE_NONE
 #define GLFW_INCLUDE_VULKAN
 
@@ -40,6 +41,8 @@ VkPresentModeKHR vkPresentModeKHR;
 VkExtent2D extent;
 VkImage *swapchainImages = nullptr;
 VkImageView *swapchainImageViews = nullptr;
+VkRenderPass renderPass;
+VkPipelineLayout pipelineLayout;
 
 const std::vector<const char *> REQUIRED_EXTENSIONS = std::vector<const char *> {
 	VK_KHR_SWAPCHAIN_EXTENSION_NAME
@@ -443,6 +446,38 @@ void CreateSwapchain() {
 	}
 }
 
+void CreateRenderPass() {
+	VkAttachmentDescription colorAttachment{};
+	colorAttachment.format = vkSurfaceFormatKHR.format;
+	colorAttachment.samples = VkSampleCountFlagBits::VK_SAMPLE_COUNT_1_BIT;
+	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;
+
+	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;
+
+	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(vkDevice, &renderPassInfo, vkAllocator, &renderPass) != VK_SUCCESS) {
+		throw "failed to create render pass!";
+	}
+}
+
 void DestroySwapchain() {
 	if (swapchainImageViews!= nullptr && swapchainImageViews != CAFE_BABE(VkImageView)) {
 		for (long i = 0; i < swapchainLength; ++i) {
@@ -461,6 +496,8 @@ void FramebufferResizeCallback(GLFWwindow *window, int width, int height) {
 		return;
   }
 	DestroySwapchain();
+	extent.width = width;
+	extent.height = height;
 	CreateSwapchain();
 }
 
@@ -472,6 +509,7 @@ void CreateWindow(PKEWindowProperties *wp) {
 	InitVulkan();
 	glfwSetFramebufferSizeCallback(window, FramebufferResizeCallback);
 	CreateSwapchain();
+	CreateRenderPass();
 }
 
 void DestroyWindow() {
@@ -480,6 +518,8 @@ void DestroyWindow() {
 		auto vkDestroyDebugReportCallbackEXT = (PFN_vkDestroyDebugReportCallbackEXT)vkGetInstanceProcAddr(vkInstance, "vkDestroyDebugReportCallbackEXT");
 		vkDestroyDebugReportCallbackEXT(vkInstance, vkDebugReport, nullptr);
 	}
+	vkDestroyPipelineLayout(vkDevice, pipelineLayout, nullptr);
+	vkDestroyRenderPass(vkDevice, renderPass, nullptr);
 	DestroySwapchain();
 	vkDestroySurfaceKHR(vkInstance, vkSurfaceKHR, vkAllocator);
 	vkDestroyDevice(vkDevice, vkAllocator);
-- 
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