CreateRenderPass

CreateRenderPass

void FVulkanApplication::CreateRenderPass()
{
	VkAttachmentDescription colorAttachment = {};
	colorAttachment.format = swapChain.colorFormat;
	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;

	VkAttachmentDescription depthAttachment = {};
  // depthAttachment.format is set to VK_FORMAT_D32_SFLOAT on machine
	depthAttachment.format = FVulkanCalculator::FindDepthFormat(vulkanDevice.physicalDevice);
	depthAttachment.samples = VK_SAMPLE_COUNT_1_BIT;
	depthAttachment.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
	depthAttachment.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
	depthAttachment.stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
	depthAttachment.stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
	depthAttachment.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
	depthAttachment.finalLayout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;

	VkAttachmentReference colorAttachmentRef = {};
	colorAttachmentRef.attachment = 0;
	colorAttachmentRef.layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;

	VkAttachmentReference depthAttachmentRef = {};
	depthAttachmentRef.attachment = 1;
	depthAttachmentRef.layout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;

	VkSubpassDescription subPass = {};
	subPass.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
	subPass.colorAttachmentCount = 1;
	subPass.pColorAttachments = &colorAttachmentRef;
	subPass.pDepthStencilAttachment = &depthAttachmentRef;

	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_READ_BIT | VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;

	std::array<VkAttachmentDescription, 2> attachments = { colorAttachment, depthAttachment };
	VkRenderPassCreateInfo renderPassInfo = FVulkanInitializers::RenderPassCreateInfo();
	renderPassInfo.attachmentCount = static_cast<uint32_t>(attachments.size());
	renderPassInfo.pAttachments = attachments.data();
	renderPassInfo.subpassCount = 1;
	renderPassInfo.pSubpasses = &subPass;
	renderPassInfo.dependencyCount = 1;
	renderPassInfo.pDependencies = &dependency;

	if (vkCreateRenderPass(vulkanDevice.logicalDevice, &renderPassInfo, nullptr, &renderPass) != VK_SUCCESS)
	{
		throw std::runtime_error("failed to create render pass!");
	}
}