Added basic descriptor sets usage example
This commit is contained in:
saschawillems
parent
f5ba1e8939
commit
3c578a065f
7 changed files with 486 additions and 12 deletions
427
examples/descriptorsets/descriptorsets.cpp
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427
examples/descriptorsets/descriptorsets.cpp
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/*
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* Vulkan Example - Using descriptor sets for passing data to shader stages
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*
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* Relevant code parts are marked with [POI]
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*
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* Copyright (C) 2018 by Sascha Willems - www.saschawillems.de
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*
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* This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include <vector>
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#define GLM_FORCE_RADIANS
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#define GLM_FORCE_DEPTH_ZERO_TO_ONE
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#include <glm/glm.hpp>
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#include <glm/gtc/matrix_transform.hpp>
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#include <glm/gtc/type_ptr.hpp>
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#include <vulkan/vulkan.h>
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#include "vulkanexamplebase.h"
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#include "VulkanTexture.hpp"
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#include "VulkanModel.hpp"
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#define ENABLE_VALIDATION false
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class VulkanExample : public VulkanExampleBase
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{
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public:
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bool animate = true;
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vks::VertexLayout vertexLayout = vks::VertexLayout({
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vks::VERTEX_COMPONENT_POSITION,
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vks::VERTEX_COMPONENT_NORMAL,
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vks::VERTEX_COMPONENT_UV,
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vks::VERTEX_COMPONENT_COLOR,
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});
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struct Cube {
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struct Matrices {
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glm::mat4 projection;
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glm::mat4 view;
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glm::mat4 model;
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} matrices;
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VkDescriptorSet descriptorSet;
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vks::Texture2D texture;
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vks::Buffer uniformBuffer;
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glm::vec3 rotation;
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};
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std::array<Cube, 2> cubes;
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struct Models {
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vks::Model cube;
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} models;
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VkPipeline pipeline;
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VkPipelineLayout pipelineLayout;
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VkDescriptorSetLayout descriptorSetLayout;
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VulkanExample() : VulkanExampleBase(ENABLE_VALIDATION)
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{
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title = "Using descriptor Sets";
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settings.overlay = true;
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camera.type = Camera::CameraType::lookat;
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camera.setPerspective(60.0f, (float)width / (float)height, 0.1f, 512.0f);
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camera.setRotation(glm::vec3(0.0f, 0.0f, 0.0f));
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camera.setTranslation(glm::vec3(0.0f, 0.0f, -5.0f));
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}
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~VulkanExample()
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{
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vkDestroyPipeline(device, pipeline, nullptr);
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vkDestroyPipelineLayout(device, pipelineLayout, nullptr);
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vkDestroyDescriptorSetLayout(device, descriptorSetLayout, nullptr);
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models.cube.destroy();
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for (auto cube : cubes) {
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cube.uniformBuffer.destroy();
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cube.texture.destroy();
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}
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}
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virtual void getEnabledFeatures()
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{
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if (deviceFeatures.samplerAnisotropy) {
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enabledFeatures.samplerAnisotropy = VK_TRUE;
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};
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}
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void buildCommandBuffers()
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{
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VkCommandBufferBeginInfo cmdBufInfo = vks::initializers::commandBufferBeginInfo();
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VkClearValue clearValues[2];
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clearValues[0].color = defaultClearColor;
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clearValues[1].depthStencil = { 1.0f, 0 };
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VkRenderPassBeginInfo renderPassBeginInfo = vks::initializers::renderPassBeginInfo();
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renderPassBeginInfo.renderPass = renderPass;
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renderPassBeginInfo.renderArea.offset.x = 0;
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renderPassBeginInfo.renderArea.offset.y = 0;
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renderPassBeginInfo.renderArea.extent.width = width;
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renderPassBeginInfo.renderArea.extent.height = height;
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renderPassBeginInfo.clearValueCount = 2;
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renderPassBeginInfo.pClearValues = clearValues;
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for (int32_t i = 0; i < drawCmdBuffers.size(); ++i) {
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renderPassBeginInfo.framebuffer = frameBuffers[i];
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VK_CHECK_RESULT(vkBeginCommandBuffer(drawCmdBuffers[i], &cmdBufInfo));
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vkCmdBeginRenderPass(drawCmdBuffers[i], &renderPassBeginInfo, VK_SUBPASS_CONTENTS_INLINE);
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vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipeline);
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VkViewport viewport = vks::initializers::viewport((float)width, (float)height, 0.0f, 1.0f);
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vkCmdSetViewport(drawCmdBuffers[i], 0, 1, &viewport);
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VkRect2D scissor = vks::initializers::rect2D(width, height, 0, 0);
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vkCmdSetScissor(drawCmdBuffers[i], 0, 1, &scissor);
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VkDeviceSize offsets[1] = { 0 };
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vkCmdBindVertexBuffers(drawCmdBuffers[i], 0, 1, &models.cube.vertices.buffer, offsets);
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vkCmdBindIndexBuffer(drawCmdBuffers[i], models.cube.indices.buffer, 0, VK_INDEX_TYPE_UINT32);
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/*
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[POI] Render cubes with separate descriptor sets
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*/
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for (auto cube : cubes) {
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// Bind the cube's descriptor set. This tells the command buffer to use the uniform buffer and image set for this cube
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vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 1, &cube.descriptorSet, 0, nullptr);
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vkCmdDrawIndexed(drawCmdBuffers[i], models.cube.indexCount, 1, 0, 0, 0);
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}
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vkCmdEndRenderPass(drawCmdBuffers[i]);
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VK_CHECK_RESULT(vkEndCommandBuffer(drawCmdBuffers[i]));
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}
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}
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void loadAssets()
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{
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models.cube.loadFromFile(getAssetPath() + "models/cube.dae", vertexLayout, 1.0f, vulkanDevice, queue);
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cubes[0].texture.loadFromFile(getAssetPath() + "textures/crate01_color_height_rgba.ktx", VK_FORMAT_R8G8B8A8_UNORM, vulkanDevice, queue);
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cubes[1].texture.loadFromFile(getAssetPath() + "textures/crate02_color_height_rgba.ktx", VK_FORMAT_R8G8B8A8_UNORM, vulkanDevice, queue);
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}
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/*
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[POI] Set up descriptor sets and set layout
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*/
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void setupDescriptors()
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{
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/*
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Descriptor set layout
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The layout describes the shader bindings and types used for a certain descriptor layout and as such must match the shader bindings
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Shader bindings used in this example:
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VS:
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layout (set = 0, binding = 0) uniform UBOMatrices ...
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FS :
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layout (set = 0, binding = 1) uniform sampler2D ...;
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*/
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std::array<VkDescriptorSetLayoutBinding,2> setLayoutBindings{};
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/*
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Binding 0: Uniform buffers (used to pass matrices matrices)
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*/
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setLayoutBindings[0].descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
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// Shader binding point
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setLayoutBindings[0].binding = 0;
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// Accessible from the vertex shader only (flags can be combined to make it accessible to multiple shader stages)
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setLayoutBindings[0].stageFlags = VK_SHADER_STAGE_VERTEX_BIT;
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// Binding contains one element (can be used for array bindings)
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setLayoutBindings[0].descriptorCount = 1;
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/*
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Binding 1: Combined image sampler (used to pass per object texture information)
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*/
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setLayoutBindings[1].descriptorType = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
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setLayoutBindings[1].binding = 1;
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// Accessible from the fragment shader only
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setLayoutBindings[1].stageFlags = VK_SHADER_STAGE_FRAGMENT_BIT;
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setLayoutBindings[1].descriptorCount = 1;
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// Create the descriptor set layout
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VkDescriptorSetLayoutCreateInfo descriptorLayoutCI{};
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descriptorLayoutCI.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO;
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descriptorLayoutCI.bindingCount = static_cast<uint32_t>(setLayoutBindings.size());
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descriptorLayoutCI.pBindings = setLayoutBindings.data();
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VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorLayoutCI, nullptr, &descriptorSetLayout));
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/*
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Descriptor pool
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Actual descriptors are allocated from a descriptor pool telling the driver what types and how many
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descriptors this application will use
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An application can have multiple pools (e.g. for multiple threads) with any number of descriptor types
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as long as device limits are not surpassed
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It's good practice to allocate pools with actually required descriptor types and counts
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*/
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std::array<VkDescriptorPoolSize, 2> descriptorPoolSizes{};
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// Uniform buffers : 1 for scene and 1 per object (scene and local matrices)
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descriptorPoolSizes[0].type = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
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descriptorPoolSizes[0].descriptorCount = 1 + static_cast<uint32_t>(cubes.size());
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// Combined image samples : 1 per mesh texture
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descriptorPoolSizes[1].type = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
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descriptorPoolSizes[1].descriptorCount = static_cast<uint32_t>(cubes.size());
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// Create the global descriptor pool
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VkDescriptorPoolCreateInfo descriptorPoolCI = {};
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descriptorPoolCI.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO;
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descriptorPoolCI.poolSizeCount = static_cast<uint32_t>(descriptorPoolSizes.size());
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descriptorPoolCI.pPoolSizes = descriptorPoolSizes.data();
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// Max. number of descriptor sets that can be allocted from this pool (one per object)
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descriptorPoolCI.maxSets = static_cast<uint32_t>(descriptorPoolSizes.size());
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VK_CHECK_RESULT(vkCreateDescriptorPool(device, &descriptorPoolCI, nullptr, &descriptorPool));
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/*
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Descriptor sets
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Using the shared descriptor set layout and the descriptor pool we will now allocate the descriptor sets.
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Descriptor sets contain the actual descriptor fo the objects (buffers, images) used at render time.
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*/
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for (auto &cube: cubes) {
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// Allocates an empty descriptor set without actual descriptors from the pool using the set layout
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VkDescriptorSetAllocateInfo allocateInfo{};
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allocateInfo.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO;
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allocateInfo.descriptorPool = descriptorPool;
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allocateInfo.descriptorSetCount = 1;
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allocateInfo.pSetLayouts = &descriptorSetLayout;
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VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocateInfo, &cube.descriptorSet));
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// Update the descriptor set with the actual descriptors matching shader bindings set in the layout
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std::array<VkWriteDescriptorSet, 2> writeDescriptorSets{};
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/*
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Binding 0: Object matrices Uniform buffer
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*/
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writeDescriptorSets[0].sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
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writeDescriptorSets[0].dstSet = cube.descriptorSet;
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writeDescriptorSets[0].dstBinding = 0;
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writeDescriptorSets[0].descriptorType = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
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writeDescriptorSets[0].pBufferInfo = &cube.uniformBuffer.descriptor;
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writeDescriptorSets[0].descriptorCount = 1;
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/*
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Binding 1: Object texture
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*/
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writeDescriptorSets[1].sType = VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET;
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writeDescriptorSets[1].dstSet = cube.descriptorSet;
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writeDescriptorSets[1].dstBinding = 1;
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writeDescriptorSets[1].descriptorType = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
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// Images use a different descriptor strucutre, so we use pImageInfo instead of pBufferInfo
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writeDescriptorSets[1].pImageInfo = &cube.texture.descriptor;
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writeDescriptorSets[1].descriptorCount = 1;
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// Execute the writes to update descriptors for this set
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// Note that it's also possible to gather all writes and only run updates once, even for multiple sets
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// This is possible because each VkWriteDescriptorSet also contains the destination set to be updated
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// For simplicity we will update once per set instead
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vkUpdateDescriptorSets(device, static_cast<uint32_t>(writeDescriptorSets.size()), writeDescriptorSets.data(), 0, nullptr);
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}
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}
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void preparePipelines()
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{
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/*
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[POI] Create a pipeline layout used for our graphics pipeline
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*/
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VkPipelineLayoutCreateInfo pipelineLayoutCI{};
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pipelineLayoutCI.sType = VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO;
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// The pipeline layout is based on the descriptor set layout we created above
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pipelineLayoutCI.setLayoutCount = 1;
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pipelineLayoutCI.pSetLayouts = &descriptorSetLayout;
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VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pipelineLayoutCI, nullptr, &pipelineLayout));
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const std::vector<VkDynamicState> dynamicStateEnables = { VK_DYNAMIC_STATE_VIEWPORT, VK_DYNAMIC_STATE_SCISSOR };
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VkPipelineInputAssemblyStateCreateInfo inputAssemblyStateCI = vks::initializers::pipelineInputAssemblyStateCreateInfo(VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST, 0, VK_FALSE);
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VkPipelineRasterizationStateCreateInfo rasterizationStateCI = vks::initializers::pipelineRasterizationStateCreateInfo(VK_POLYGON_MODE_FILL, VK_CULL_MODE_BACK_BIT, VK_FRONT_FACE_CLOCKWISE, 0);
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VkPipelineColorBlendAttachmentState blendAttachmentState = vks::initializers::pipelineColorBlendAttachmentState(0xf, VK_FALSE);
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VkPipelineColorBlendStateCreateInfo colorBlendStateCI = vks::initializers::pipelineColorBlendStateCreateInfo(1, &blendAttachmentState);
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VkPipelineDepthStencilStateCreateInfo depthStencilStateCI = vks::initializers::pipelineDepthStencilStateCreateInfo(VK_TRUE, VK_TRUE, VK_COMPARE_OP_LESS_OR_EQUAL);
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VkPipelineViewportStateCreateInfo viewportStateCI = vks::initializers::pipelineViewportStateCreateInfo(1, 1, 0);
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VkPipelineMultisampleStateCreateInfo multisampleStateCI = vks::initializers::pipelineMultisampleStateCreateInfo(VK_SAMPLE_COUNT_1_BIT, 0);
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VkPipelineDynamicStateCreateInfo dynamicStateCI = vks::initializers::pipelineDynamicStateCreateInfo(dynamicStateEnables.data(), static_cast<uint32_t>(dynamicStateEnables.size()),0);
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// Vertex bindings and attributes
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const std::vector<VkVertexInputBindingDescription> vertexInputBindings = {
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vks::initializers::vertexInputBindingDescription(0, vertexLayout.stride(), VK_VERTEX_INPUT_RATE_VERTEX),
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};
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const std::vector<VkVertexInputAttributeDescription> vertexInputAttributes = {
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vks::initializers::vertexInputAttributeDescription(0, 0, VK_FORMAT_R32G32B32_SFLOAT, 0), // Location 0: Position
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vks::initializers::vertexInputAttributeDescription(0, 1, VK_FORMAT_R32G32B32_SFLOAT, sizeof(float) * 3), // Location 1: Normal
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vks::initializers::vertexInputAttributeDescription(0, 2, VK_FORMAT_R32G32_SFLOAT, sizeof(float) * 6), // Location 2: UV
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vks::initializers::vertexInputAttributeDescription(0, 3, VK_FORMAT_R32G32B32_SFLOAT, sizeof(float) * 8), // Location 3: Color
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};
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VkPipelineVertexInputStateCreateInfo vertexInputState = vks::initializers::pipelineVertexInputStateCreateInfo();
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vertexInputState.vertexBindingDescriptionCount = static_cast<uint32_t>(vertexInputBindings.size());
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vertexInputState.pVertexBindingDescriptions = vertexInputBindings.data();
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vertexInputState.vertexAttributeDescriptionCount = static_cast<uint32_t>(vertexInputAttributes.size());
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vertexInputState.pVertexAttributeDescriptions = vertexInputAttributes.data();
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VkGraphicsPipelineCreateInfo pipelineCreateInfoCI = vks::initializers::pipelineCreateInfo(pipelineLayout, renderPass, 0);
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pipelineCreateInfoCI.pVertexInputState = &vertexInputState;
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pipelineCreateInfoCI.pInputAssemblyState = &inputAssemblyStateCI;
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pipelineCreateInfoCI.pRasterizationState = &rasterizationStateCI;
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pipelineCreateInfoCI.pColorBlendState = &colorBlendStateCI;
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pipelineCreateInfoCI.pMultisampleState = &multisampleStateCI;
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pipelineCreateInfoCI.pViewportState = &viewportStateCI;
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pipelineCreateInfoCI.pDepthStencilState = &depthStencilStateCI;
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pipelineCreateInfoCI.pDynamicState = &dynamicStateCI;
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const std::array<VkPipelineShaderStageCreateInfo, 2> shaderStages = {
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loadShader(getAssetPath() + "shaders/descriptorsets/cube.vert.spv", VK_SHADER_STAGE_VERTEX_BIT),
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loadShader(getAssetPath() + "shaders/descriptorsets/cube.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT)
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};
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pipelineCreateInfoCI.stageCount = static_cast<uint32_t>(shaderStages.size());
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pipelineCreateInfoCI.pStages = shaderStages.data();
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VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfoCI, nullptr, &pipeline));
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}
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void prepareUniformBuffers()
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{
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// Vertex shader matrix uniform buffer block
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for (auto& cube : cubes) {
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VK_CHECK_RESULT(vulkanDevice->createBuffer(
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VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
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VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
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&cube.uniformBuffer,
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sizeof(glm::mat4)));
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VK_CHECK_RESULT(cube.uniformBuffer.map());
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}
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updateUniformBuffers();
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}
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void updateUniformBuffers()
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{
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cubes[0].matrices.model = glm::translate(glm::mat4(1.0f), glm::vec3(-2.0f, 0.0f, 0.0f));
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cubes[1].matrices.model = glm::translate(glm::mat4(1.0f), glm::vec3( 1.5f, 0.5f, 0.0f));
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for (auto& cube : cubes) {
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cube.matrices.projection = camera.matrices.perspective;
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cube.matrices.view = camera.matrices.view;
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cube.matrices.model = glm::rotate(cube.matrices.model, glm::radians(cube.rotation.x), glm::vec3(1.0f, 0.0f, 0.0f));
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cube.matrices.model = glm::rotate(cube.matrices.model, glm::radians(cube.rotation.y), glm::vec3(0.0f, 1.0f, 0.0f));
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cube.matrices.model = glm::rotate(cube.matrices.model, glm::radians(cube.rotation.z), glm::vec3(0.0f, 0.0f, 1.0f));
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memcpy(cube.uniformBuffer.mapped, &cube.matrices, sizeof(cube.matrices));
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}
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}
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void draw()
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{
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VulkanExampleBase::prepareFrame();
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submitInfo.commandBufferCount = 1;
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submitInfo.pCommandBuffers = &drawCmdBuffers[currentBuffer];
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VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE));
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VulkanExampleBase::submitFrame();
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}
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void prepare()
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{
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VulkanExampleBase::prepare();
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loadAssets();
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prepareUniformBuffers();
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setupDescriptors();
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preparePipelines();
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buildCommandBuffers();
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prepared = true;
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}
|
||||
|
||||
virtual void render()
|
||||
{
|
||||
if (!prepared)
|
||||
return;
|
||||
draw();
|
||||
if (animate) {
|
||||
cubes[0].rotation.x += 2.5f * frameTimer;
|
||||
if (cubes[0].rotation.x > 360.0f)
|
||||
cubes[0].rotation.x -= 360.0f;
|
||||
cubes[1].rotation.y += 2.0f * frameTimer;
|
||||
if (cubes[1].rotation.x > 360.0f)
|
||||
cubes[1].rotation.x -= 360.0f;
|
||||
}
|
||||
if ((camera.updated) || (animate)) {
|
||||
updateUniformBuffers();
|
||||
}
|
||||
}
|
||||
|
||||
virtual void OnUpdateUIOverlay(vks::UIOverlay *overlay)
|
||||
{
|
||||
if (overlay->header("Settings")) {
|
||||
overlay->checkBox("Animate", &animate);
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
VULKAN_EXAMPLE_MAIN()
|
||||
Loading…
Add table
Add a link
Reference in a new issue