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xo-imgui: refactor ex4a: create_render_pass()

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This commit is contained in:
Roland Conybeare 2025-11-11 10:02:15 -05:00
commit 78b2cd4f0c
2 changed files with 56 additions and 47 deletions
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44
xo-imgui/example/ex4a/VulkanApp.cpp
View file

@ -242,4 +242,48 @@ MinimalImGuiVulkan::create_image_views()
}
}
void
MinimalImGuiVulkan::create_render_pass()
{
VkAttachmentDescription color_attachment{};
color_attachment.format = swapchain_image_format_;
color_attachment.samples = VK_SAMPLE_COUNT_1_BIT;
color_attachment.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
color_attachment.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
color_attachment.stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
color_attachment.stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
color_attachment.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
color_attachment.finalLayout = VK_IMAGE_LAYOUT_PRESENT_SRC_KHR;
VkAttachmentReference color_attachment_ref{};
color_attachment_ref.attachment = 0;
color_attachment_ref.layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
VkSubpassDescription subpass{};
subpass.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
subpass.colorAttachmentCount = 1;
subpass.pColorAttachments = &color_attachment_ref;
VkSubpassDependency dependency{};
dependency.srcSubpass = VK_SUBPASS_EXTERNAL;
dependency.dstSubpass = 0;
dependency.srcStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
dependency.srcAccessMask = 0;
dependency.dstStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
dependency.dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
VkRenderPassCreateInfo render_pass_info{};
render_pass_info.sType = VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO;
render_pass_info.attachmentCount = 1;
render_pass_info.pAttachments = &color_attachment;
render_pass_info.subpassCount = 1;
render_pass_info.pSubpasses = &subpass;
render_pass_info.dependencyCount = 1;
render_pass_info.pDependencies = &dependency;
if (vkCreateRenderPass(device_, &render_pass_info, nullptr, &(this->render_pass_)) != VK_SUCCESS) {
throw std::runtime_error("Failed to create render pass!");
}
}
/* end VulkanApp.cpp */

59
xo-imgui/example/ex4a/VulkanApp.hpp
View file

@ -57,47 +57,10 @@ private:
*/
void create_image_views();
void create_render_pass() {
VkAttachmentDescription colorAttachment{};
colorAttachment.format = swapchain_image_format_;
colorAttachment.samples = 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;
VkSubpassDependency dependency{};
dependency.srcSubpass = VK_SUBPASS_EXTERNAL;
dependency.dstSubpass = 0;
dependency.srcStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
dependency.srcAccessMask = 0;
dependency.dstStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
dependency.dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
VkRenderPassCreateInfo renderPassInfo{};
renderPassInfo.sType = VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO;
renderPassInfo.attachmentCount = 1;
renderPassInfo.pAttachments = &colorAttachment;
renderPassInfo.subpassCount = 1;
renderPassInfo.pSubpasses = &subpass;
renderPassInfo.dependencyCount = 1;
renderPassInfo.pDependencies = &dependency;
if (vkCreateRenderPass(device_, &renderPassInfo, nullptr, &renderPass) != VK_SUCCESS) {
throw std::runtime_error("Failed to create render pass!");
}
}
/*
* populate @ref render_pass_
*/
void create_render_pass();
void create_framebuffers() {
framebuffers.resize(swapchain_image_views_.size());
@ -107,7 +70,7 @@ private:
VkFramebufferCreateInfo framebufferInfo{};
framebufferInfo.sType = VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO;
framebufferInfo.renderPass = renderPass;
framebufferInfo.renderPass = render_pass_;
framebufferInfo.attachmentCount = 1;
framebufferInfo.pAttachments = attachments;
framebufferInfo.width = swapchain_extent_.width;
@ -212,7 +175,7 @@ private:
init_info.Queue = graphics_queue_;
init_info.PipelineCache = VK_NULL_HANDLE;
init_info.DescriptorPool = descriptorPool;
init_info.RenderPass = renderPass;
init_info.RenderPass = render_pass_;
init_info.Subpass = 0;
init_info.MinImageCount = MAX_FRAMES_IN_FLIGHT;
init_info.ImageCount = static_cast<uint32_t>(swapchain_images_.size());
@ -220,7 +183,7 @@ private:
init_info.Allocator = nullptr;
init_info.CheckVkResultFn = nullptr;
ImGui_ImplVulkan_Init(&init_info);
//ImGui_ImplVulkan_Init(&init_info, renderPass);
//ImGui_ImplVulkan_Init(&init_info, render_pass_);
// Upload Fonts
VkCommandBuffer command_buffer = beginSingleTimeCommands();
@ -369,7 +332,7 @@ private:
VkRenderPassBeginInfo renderPassInfo{};
renderPassInfo.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO;
renderPassInfo.renderPass = renderPass;
renderPassInfo.renderPass = render_pass_;
renderPassInfo.framebuffer = framebuffers[imageIndex];
renderPassInfo.renderArea.offset = {0, 0};
renderPassInfo.renderArea.extent = swapchain_extent_;
@ -469,7 +432,7 @@ private:
this->cleanupImageViews();
this->cleanupSwapchain();
vkDestroyRenderPass(device_, renderPass, nullptr);
vkDestroyRenderPass(device_, render_pass_, nullptr);
vkDestroyDescriptorPool(device_, descriptorPool, nullptr);
vkDestroyDevice(device_, nullptr);
vkDestroySurfaceKHR(instance_, this->surface_, nullptr);
@ -505,7 +468,9 @@ private:
std::vector<VkImage> swapchain_images_;
std::vector<VkImageView> swapchain_image_views_;
VkRenderPass renderPass;
VkRenderPass render_pass_;
std::vector<VkFramebuffer> framebuffers;
VkCommandPool commandPool;
std::vector<VkCommandBuffer> commandBuffers;