完成帧同步和绘制

VulkanTutorial.cpp

@@ -121,6 +121,8 @@ void HelloTriangleApplication::initVulkan() {
 
 	createCommandBuffer();
 
+	createSyncObjects();
+
 }
 
 
@@ -133,6 +135,8 @@ void HelloTriangleApplication::mainLoop(GLFWwindow* window){
 		drawFrame();
 	}
 
+	vkDeviceWaitIdle(device);
+
 }
 
 
@@ -141,6 +145,10 @@ void HelloTriangleApplication::cleanup(GLFWwindow* window) {
 
 	std::cout << "\nstart to destroy resource\n" << std::endl;
 
+	vkDestroySemaphore(device, imageAvailableSemaphore, nullptr);
+	vkDestroySemaphore(device, renderFinishedSemaphore, nullptr);
+	vkDestroyFence(device, inFlightFence, nullptr);
+
 	vkDestroyCommandPool(device, commandPool, nullptr);
 	
 	for (auto framebuffer : swapChainFramebuffers)
@@ -729,6 +737,67 @@ void HelloTriangleApplication::recordCommandBuffer(VkCommandBuffer commandBuffer
 
 void HelloTriangleApplication::drawFrame()
 {
+	//等待所有fence收到信号后返回，uint64_max禁用超时
+	vkWaitForFences(device, 1, &inFlightFence, VK_TRUE, UINT64_MAX);
+
+	vkResetFences(device, 1, &inFlightFence);
+
+	uint32_t imageIndex;
+	vkAcquireNextImageKHR(device, swapChain, UINT64_MAX, imageAvailableSemaphore, VK_NULL_HANDLE, &imageIndex);
+
+	vkResetCommandBuffer(commandBuffer, 0);
+	recordCommandBuffer(commandBuffer, imageIndex);
+
+	VkSubmitInfo submitInfo{};
+	submitInfo.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
+
+	VkSemaphore waitSemaphores[] = { imageAvailableSemaphore };
+	VkPipelineStageFlags waitStages[] = { VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT };
+	submitInfo.waitSemaphoreCount = 1;
+	submitInfo.pWaitSemaphores = waitSemaphores;
+	submitInfo.pWaitDstStageMask = waitStages;
+	submitInfo.commandBufferCount = 1;
+	submitInfo.pCommandBuffers = &commandBuffer;
+
+	VkSemaphore signalSemaphores[] = { renderFinishedSemaphore };
+	submitInfo.signalSemaphoreCount = 1;
+	submitInfo.pSignalSemaphores = signalSemaphores;
+
+	if (vkQueueSubmit(graphicQueue,1,&submitInfo,inFlightFence) != VK_SUCCESS)
+	{
+		throw std::runtime_error("failed to submit draw command buffer in drawFrame");
+	}
+
+	VkPresentInfoKHR presentInfo{};
+	presentInfo.sType = VK_STRUCTURE_TYPE_PRESENT_INFO_KHR;
+
+	presentInfo.waitSemaphoreCount = 1;
+	presentInfo.pWaitSemaphores = signalSemaphores;
+
+	VkSwapchainKHR swapChains[] = { swapChain };
+	presentInfo.swapchainCount = 1;
+	presentInfo.pSwapchains = swapChains;
+	presentInfo.pImageIndices = &imageIndex;
+	presentInfo.pResults = nullptr;
+	vkQueuePresentKHR(presentQueue, &presentInfo);
+
+}
+
+void HelloTriangleApplication::createSyncObjects()
+{
+	VkSemaphoreCreateInfo semaphoreInfo{};
+	semaphoreInfo.sType = VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO;
+
+	VkFenceCreateInfo fenceInfo{};
+	fenceInfo.sType = VK_STRUCTURE_TYPE_FENCE_CREATE_INFO;
+	fenceInfo.flags = VK_FENCE_CREATE_SIGNALED_BIT;//防止vkWaitForFences在第一帧无限期阻塞
+
+	if (vkCreateSemaphore(device,&semaphoreInfo,nullptr,&imageAvailableSemaphore) != VK_SUCCESS ||
+		vkCreateSemaphore(device, &semaphoreInfo, nullptr, &renderFinishedSemaphore) != VK_SUCCESS ||
+		vkCreateFence(device,&fenceInfo,nullptr,&inFlightFence) != VK_SUCCESS)
+	{
+		throw std::runtime_error("failed to create semaphores in creatSyncObjects");
+	}
 
 }
 
@@ -757,6 +826,14 @@ void HelloTriangleApplication::createRenderPass()
 	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;
@@ -764,6 +841,9 @@ void HelloTriangleApplication::createRenderPass()
 	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 in createRenderPass");

VulkanTutorial.h

@@ -68,6 +68,10 @@ private:
 
 	VkPipeline graphicsPipeline;
 
+	VkSemaphore imageAvailableSemaphore;
+	VkSemaphore renderFinishedSemaphore;
+	VkFence inFlightFence;
+
 	struct QueueFamilyIndices
 	{
 		std::optional<uint32_t> graphicsFamily;
@@ -153,6 +157,8 @@ private:
 
 	void drawFrame();
 
+	void createSyncObjects();
+
 };
 
 HelloTriangleApplication::HelloTriangleApplication()