Added sample fro dynamic rendering using VK_KHR_dynamic_rendering

base/vulkanexamplebase.cpp

@@ -823,7 +823,10 @@ VulkanExampleBase::~VulkanExampleBase()
 		vkDestroyDescriptorPool(device, descriptorPool, nullptr);
 	}
 	destroyCommandBuffers();
-	vkDestroyRenderPass(device, renderPass, nullptr);
+	if (renderPass != VK_NULL_HANDLE)
+	{
+		vkDestroyRenderPass(device, renderPass, nullptr);
+	}
 	for (uint32_t i = 0; i < frameBuffers.size(); i++)
 	{
 		vkDestroyFramebuffer(device, frameBuffers[i], nullptr);

base/vulkanexamplebase.h

@@ -153,7 +153,7 @@ protected:
 	// Command buffers used for rendering
 	std::vector<VkCommandBuffer> drawCmdBuffers;
 	// Global render pass for frame buffer writes
-	VkRenderPass renderPass;
+	VkRenderPass renderPass = VK_NULL_HANDLE;
 	// List of available frame buffers (same as number of swap chain images)
 	std::vector<VkFramebuffer>frameBuffers;
 	// Active frame buffer index

data/shaders/glsl/dynamicrendering/texture.frag

@@ -0,0 +1,26 @@
+#version 450
+
+layout (set = 1, binding = 0) uniform sampler2D samplerColor;
+
+layout (location = 0) in vec2 inUV;
+layout (location = 1) in vec3 inNormal;
+layout (location = 2) in vec3 inViewVec;
+layout (location = 3) in vec3 inLightVec;
+
+layout (location = 0) out vec4 outFragColor;
+
+void main() 
+{
+	vec4 color = texture(samplerColor, inUV);
+
+	vec3 N = normalize(inNormal);
+	vec3 L = normalize(inLightVec);
+	vec3 V = normalize(inViewVec);
+	vec3 R = reflect(-L, N);
+	vec3 diffuse = max(dot(N, L), 0.0) * vec3(1.0);
+	float specular = pow(max(dot(R, V), 0.0), 16.0) * color.a;
+
+	outFragColor = vec4(diffuse * color.rgb + specular, 1.0);	
+
+	outFragColor = texture(samplerColor, inUV);
+}

data/shaders/glsl/dynamicrendering/texture.vert

@@ -0,0 +1,33 @@
+#version 450
+
+layout (location = 0) in vec3 inPos;
+layout (location = 1) in vec3 inNormal;
+layout (location = 2) in vec2 inUV;
+
+layout (binding = 0) uniform UBO 
+{
+	mat4 projection;
+	mat4 model;
+	vec4 viewPos;
+} ubo;
+
+layout (location = 0) out vec2 outUV;
+layout (location = 1) out vec3 outNormal;
+layout (location = 2) out vec3 outViewVec;
+layout (location = 3) out vec3 outLightVec;
+
+void main() 
+{
+	outUV = inUV;
+
+	vec3 worldPos = vec3(ubo.model * vec4(inPos, 1.0));
+
+	gl_Position = ubo.projection * ubo.model * vec4(inPos.xyz, 1.0);
+
+    vec4 pos = ubo.model * vec4(inPos, 1.0);
+	outNormal = mat3(inverse(transpose(ubo.model))) * inNormal;
+	vec3 lightPos = vec3(0.0);
+	vec3 lPos = mat3(ubo.model) * lightPos.xyz;
+    outLightVec = lPos - pos.xyz;
+    outViewVec = ubo.viewPos.xyz - pos.xyz;		
+}

examples/CMakeLists.txt

@@ -79,6 +79,7 @@ set(EXAMPLES
 	descriptorsets
 	displacement
 	distancefieldfonts
+	dynamicrendering
 	dynamicuniformbuffer
 	gears
 	geometryshader

examples/dynamicrendering/dynamicrendering.cpp

@@ -0,0 +1,281 @@
+/*
+ * Vulkan Example - Using VK_KHR_dynamic_rendering for rendering without framebuffers and render passes (wip)
+ *
+ * Copyright (C) 2021 by Sascha Willems - www.saschawillems.de
+ *
+ * This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
+ */
+
+#include "vulkanexamplebase.h"
+#include "VulkanglTFModel.h"
+
+#define ENABLE_VALIDATION false
+
+class VulkanExample : public VulkanExampleBase
+{
+public:
+	PFN_vkCmdBeginRenderingKHR vkCmdBeginRenderingKHR;
+	PFN_vkCmdEndRenderingKHR vkCmdEndRenderingKHR;
+
+	VkPhysicalDeviceDynamicRenderingFeaturesKHR dynamicRenderingFeaturesKHR{};
+
+	vks::Texture2D texture;
+	vkglTF::Model model;
+
+	struct UniformData {
+		glm::mat4 projection;
+		glm::mat4 modelView;
+		glm::vec4 viewPos;
+	} uniformData;
+	vks::Buffer uniformBuffer;
+
+	VkPipeline pipeline;
+	VkPipelineLayout pipelineLayout;
+	VkDescriptorSet descriptorSet;
+	VkDescriptorSetLayout descriptorSetLayout;
+
+	VulkanExample() : VulkanExampleBase(ENABLE_VALIDATION)
+	{
+		title = "Dynamic rendering";
+		camera.type = Camera::CameraType::lookat;
+		camera.setPosition(glm::vec3(0.0f, 0.0f, -10.0f));
+		camera.setRotation(glm::vec3(-7.5f, 72.0f, 0.0f));
+		camera.setPerspective(60.0f, (float)width / (float)height, 0.1f, 256.0f);
+
+		enabledDeviceExtensions.push_back(VK_KHR_DYNAMIC_RENDERING_EXTENSION_NAME);
+	}
+
+	~VulkanExample()
+	{
+		if (device) {
+			vkDestroyPipeline(device, pipeline, nullptr);
+			vkDestroyPipelineLayout(device, pipelineLayout, nullptr);
+			vkDestroyDescriptorSetLayout(device, descriptorSetLayout, nullptr);
+			uniformBuffer.destroy();
+		}
+	}
+
+	void setupRenderPass()
+	{
+		// With VK_KHR_dynamic_rendering we no longer need a render pass, so skip the sample base render pass setup
+		renderPass = VK_NULL_HANDLE;
+	}
+
+	// Enable physical device features required for this example
+	virtual void getEnabledFeatures()
+	{
+		// Enable anisotropic filtering if supported
+		if (deviceFeatures.samplerAnisotropy) {
+			enabledFeatures.samplerAnisotropy = VK_TRUE;
+		};
+
+		dynamicRenderingFeaturesKHR.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DYNAMIC_RENDERING_FEATURES_KHR;
+		dynamicRenderingFeaturesKHR.dynamicRendering = VK_TRUE;
+
+		deviceCreatepNextChain = &dynamicRenderingFeaturesKHR;
+	}
+
+	void loadAssets()
+	{
+		const uint32_t glTFLoadingFlags = vkglTF::FileLoadingFlags::PreTransformVertices | vkglTF::FileLoadingFlags::PreMultiplyVertexColors | vkglTF::FileLoadingFlags::FlipY;
+		model.loadFromFile(getAssetPath() + "models/voyager.gltf", vulkanDevice, queue, glTFLoadingFlags);
+		texture.loadFromFile(getAssetPath() + "textures/vulkan_11_rgba.ktx", VK_FORMAT_R8G8B8A8_UNORM, vulkanDevice, queue);
+	}
+
+	void buildCommandBuffers()
+	{
+		VkCommandBufferBeginInfo cmdBufInfo = vks::initializers::commandBufferBeginInfo();
+
+		for (int32_t i = 0; i < drawCmdBuffers.size(); ++i)
+		{
+			VK_CHECK_RESULT(vkBeginCommandBuffer(drawCmdBuffers[i], &cmdBufInfo));
+
+			// @todo: comment
+			VkRenderingAttachmentInfoKHR colorAttachment{};
+			colorAttachment.sType = VK_STRUCTURE_TYPE_RENDERING_ATTACHMENT_INFO_KHR;
+			colorAttachment.imageView = swapChain.buffers[i].view;
+			colorAttachment.imageLayout = VK_IMAGE_LAYOUT_ATTACHMENT_OPTIMAL_KHR;
+			colorAttachment.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
+			colorAttachment.storeOp = VK_ATTACHMENT_STORE_OP_NONE_KHR;
+			colorAttachment.clearValue.color = { 0.0f,0.0f,0.0f,0.0f };
+
+			// A single depth stencil attachment info can be used, but they can also be specified separately.
+			// When both are specified separately, the only requirement is that the image view is identical.			
+			VkRenderingAttachmentInfoKHR depthStencilAttachment{};
+			depthStencilAttachment.sType = VK_STRUCTURE_TYPE_RENDERING_ATTACHMENT_INFO_KHR;
+			depthStencilAttachment.imageView = depthStencil.view;
+			depthStencilAttachment.imageLayout = VK_IMAGE_LAYOUT_DEPTH_ATTACHMENT_OPTIMAL_KHR;
+			depthStencilAttachment.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
+			depthStencilAttachment.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
+			depthStencilAttachment.clearValue.depthStencil = { 1.0f,  0 };
+
+			VkRenderingInfoKHR renderingInfo{};
+			renderingInfo.sType = VK_STRUCTURE_TYPE_RENDERING_INFO_KHR;
+			renderingInfo.renderArea = { 0, 0, width, height };
+			renderingInfo.layerCount = 1;
+			renderingInfo.colorAttachmentCount = 1;
+			renderingInfo.pColorAttachments = &colorAttachment;
+			renderingInfo.pDepthAttachment = &depthStencilAttachment;
+			renderingInfo.pStencilAttachment = &depthStencilAttachment;
+
+			// Begin dynamic rendering
+			vkCmdBeginRenderingKHR(drawCmdBuffers[i], &renderingInfo);
+
+			VkViewport viewport = vks::initializers::viewport((float)width, (float)height, 0.0f, 1.0f);
+			vkCmdSetViewport(drawCmdBuffers[i], 0, 1, &viewport);
+
+			VkRect2D scissor = vks::initializers::rect2D(width, height, 0, 0);
+			vkCmdSetScissor(drawCmdBuffers[i], 0, 1, &scissor);
+
+			vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 1, &descriptorSet, 0, nullptr);
+			vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipeline);
+
+			model.draw(drawCmdBuffers[i], vkglTF::RenderFlags::BindImages, pipelineLayout);
+
+			// End dynamic rendering
+			vkCmdEndRenderingKHR(drawCmdBuffers[i]);
+
+			VK_CHECK_RESULT(vkEndCommandBuffer(drawCmdBuffers[i]));
+		}
+	}
+
+	void draw()
+	{
+		VulkanExampleBase::prepareFrame();
+		submitInfo.commandBufferCount = 1;
+		submitInfo.pCommandBuffers = &drawCmdBuffers[currentBuffer];
+		VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE));
+		VulkanExampleBase::submitFrame();
+	}
+
+	void setupDescriptorPool()
+	{
+		// Example uses one ubo and one image sampler
+		std::vector<VkDescriptorPoolSize> poolSizes = {
+			vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1),
+			vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1)
+		};
+		VkDescriptorPoolCreateInfo descriptorPoolInfo =
+			vks::initializers::descriptorPoolCreateInfo(poolSizes, 2);
+		VK_CHECK_RESULT(vkCreateDescriptorPool(device, &descriptorPoolInfo, nullptr, &descriptorPool));
+	}
+
+	void setupDescriptorSetLayout()
+	{
+		const std::vector<VkDescriptorSetLayoutBinding> setLayoutBindings = {
+			// Binding 0 : Vertex shader uniform buffer
+			vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, VK_SHADER_STAGE_VERTEX_BIT, 0),
+		};
+		VkDescriptorSetLayoutCreateInfo descriptorLayout = vks::initializers::descriptorSetLayoutCreateInfo(setLayoutBindings);
+		VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorLayout, nullptr, &descriptorSetLayout));
+
+		// Layout uses set 0 for passing vertex shader ubo and set 1 for fragment shader images (taken from glTF model)
+		const std::vector<VkDescriptorSetLayout> setLayouts = {
+			descriptorSetLayout,
+			vkglTF::descriptorSetLayoutImage,
+		};
+		VkPipelineLayoutCreateInfo pPipelineLayoutCreateInfo = vks::initializers::pipelineLayoutCreateInfo(setLayouts.data(), 2);
+		VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pPipelineLayoutCreateInfo, nullptr, &pipelineLayout));
+	}
+
+	void setupDescriptorSet()
+	{
+		VkDescriptorSetAllocateInfo allocInfo = vks::initializers::descriptorSetAllocateInfo(descriptorPool, &descriptorSetLayout, 1);
+		VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSet));
+		std::vector<VkWriteDescriptorSet> writeDescriptorSets = {
+			// Binding 0 : Vertex shader uniform buffer
+			vks::initializers::writeDescriptorSet(descriptorSet, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 0, &uniformBuffer.descriptor),
+		};
+		vkUpdateDescriptorSets(device, writeDescriptorSets.size(), writeDescriptorSets.data(), 0, nullptr);
+	}
+
+	void preparePipelines()
+	{
+		VkPipelineInputAssemblyStateCreateInfo inputAssemblyState = vks::initializers::pipelineInputAssemblyStateCreateInfo(VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST, 0, VK_FALSE);
+		VkPipelineRasterizationStateCreateInfo rasterizationState = vks::initializers::pipelineRasterizationStateCreateInfo(VK_POLYGON_MODE_FILL, VK_CULL_MODE_NONE, VK_FRONT_FACE_COUNTER_CLOCKWISE, 0);
+		VkPipelineColorBlendAttachmentState blendAttachmentState = vks::initializers::pipelineColorBlendAttachmentState(0xf, VK_FALSE);
+		VkPipelineColorBlendStateCreateInfo colorBlendState = vks::initializers::pipelineColorBlendStateCreateInfo(1, &blendAttachmentState);
+		VkPipelineDepthStencilStateCreateInfo depthStencilState = vks::initializers::pipelineDepthStencilStateCreateInfo(VK_TRUE, VK_TRUE, VK_COMPARE_OP_LESS_OR_EQUAL);
+		VkPipelineViewportStateCreateInfo viewportState = vks::initializers::pipelineViewportStateCreateInfo(1, 1, 0);
+		VkPipelineMultisampleStateCreateInfo multisampleState = vks::initializers::pipelineMultisampleStateCreateInfo(VK_SAMPLE_COUNT_1_BIT, 0);
+		std::vector<VkDynamicState> dynamicStateEnables = { VK_DYNAMIC_STATE_VIEWPORT, VK_DYNAMIC_STATE_SCISSOR };
+		VkPipelineDynamicStateCreateInfo dynamicState = vks::initializers::pipelineDynamicStateCreateInfo(dynamicStateEnables);
+		std::array<VkPipelineShaderStageCreateInfo, 2> shaderStages{};
+
+		// We no longer need to set a renderpass for the pipeline create info
+		VkGraphicsPipelineCreateInfo pipelineCI = vks::initializers::pipelineCreateInfo();
+		pipelineCI.layout = pipelineLayout;
+		pipelineCI.pInputAssemblyState = &inputAssemblyState;
+		pipelineCI.pRasterizationState = &rasterizationState;
+		pipelineCI.pColorBlendState = &colorBlendState;
+		pipelineCI.pMultisampleState = &multisampleState;
+		pipelineCI.pViewportState = &viewportState;
+		pipelineCI.pDepthStencilState = &depthStencilState;
+		pipelineCI.pDynamicState = &dynamicState;
+		pipelineCI.stageCount = static_cast<uint32_t>(shaderStages.size());
+		pipelineCI.pStages = shaderStages.data();
+		pipelineCI.pVertexInputState = vkglTF::Vertex::getPipelineVertexInputState({ vkglTF::VertexComponent::Position, vkglTF::VertexComponent::Normal, vkglTF::VertexComponent::UV });
+
+		// New create info to define color, depth and stencil attachments at pipeline create time
+		VkPipelineRenderingCreateInfoKHR pipelineRenderingCreateInfo{};
+		pipelineRenderingCreateInfo.sType = VK_STRUCTURE_TYPE_PIPELINE_RENDERING_CREATE_INFO_KHR;
+		pipelineRenderingCreateInfo.colorAttachmentCount = 1;
+		pipelineRenderingCreateInfo.pColorAttachmentFormats = &swapChain.colorFormat;
+		pipelineRenderingCreateInfo.depthAttachmentFormat = depthFormat;
+		pipelineRenderingCreateInfo.stencilAttachmentFormat = depthFormat;
+		// Chain into the pipeline creat einfo
+		pipelineCI.pNext = &pipelineRenderingCreateInfo;
+
+		shaderStages[0] = loadShader(getShadersPath() + "dynamicrendering/texture.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
+		shaderStages[1] = loadShader(getShadersPath() + "dynamicrendering/texture.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
+		VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCI, nullptr, &pipeline));
+	}
+
+	// Prepare and initialize uniform buffer containing shader uniforms
+	void prepareUniformBuffers()
+	{
+		VK_CHECK_RESULT(vulkanDevice->createBuffer(VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT, &uniformBuffer, sizeof(uniformData), &uniformData));
+		VK_CHECK_RESULT(uniformBuffer.map());
+
+		updateUniformBuffers();
+	}
+
+	void updateUniformBuffers()
+	{
+		uniformData.projection = camera.matrices.perspective;
+		uniformData.modelView = camera.matrices.view;
+		uniformData.viewPos = camera.viewPos;
+		memcpy(uniformBuffer.mapped, &uniformData, sizeof(uniformData));
+	}
+
+	void prepare()
+	{
+		VulkanExampleBase::prepare();
+
+		vkCmdBeginRenderingKHR = reinterpret_cast<PFN_vkCmdBeginRenderingKHR>(vkGetDeviceProcAddr(device, "vkCmdBeginRenderingKHR"));
+		vkCmdEndRenderingKHR = reinterpret_cast<PFN_vkCmdEndRenderingKHR>(vkGetDeviceProcAddr(device, "vkCmdEndRenderingKHR"));
+
+		loadAssets();
+		prepareUniformBuffers();
+		setupDescriptorSetLayout();
+		preparePipelines();
+		setupDescriptorPool();
+		setupDescriptorSet();
+		buildCommandBuffers();
+		prepared = true;
+	}
+
+	virtual void render()
+	{
+		if (!prepared)
+			return;
+		draw();
+	}
+
+	virtual void viewChanged()
+	{
+		updateUniformBuffers();
+	}
+};
+
+VULKAN_EXAMPLE_MAIN()