520 lines
20 KiB
C++
520 lines
20 KiB
C++
/*
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* Vulkan Example - Multi threaded command buffer generation and rendering
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*
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* Copyright (C) 2016-2023 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 "vulkanexamplebase.h"
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#include "threadpool.hpp"
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#include "frustum.hpp"
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#include "VulkanglTFModel.h"
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class VulkanExample : public VulkanExampleBase
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{
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public:
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bool displayStarSphere = true;
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struct {
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vkglTF::Model ufo;
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vkglTF::Model starSphere;
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} models;
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// Shared matrices used for thread push constant blocks
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struct {
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glm::mat4 projection;
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glm::mat4 view;
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} matrices;
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struct {
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VkPipeline phong{ VK_NULL_HANDLE };
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VkPipeline starsphere{ VK_NULL_HANDLE };
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} pipelines;
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VkPipelineLayout pipelineLayout{ VK_NULL_HANDLE };
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VkCommandBuffer primaryCommandBuffer{ VK_NULL_HANDLE };
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// Secondary scene command buffers used to store backdrop and user interface
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struct SecondaryCommandBuffers {
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VkCommandBuffer background{ VK_NULL_HANDLE };
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VkCommandBuffer ui{ VK_NULL_HANDLE };
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} secondaryCommandBuffers;
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// Number of animated objects to be renderer
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// by using threads and secondary command buffers
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uint32_t numObjectsPerThread{ 0 };
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// Multi threaded stuff
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// Max. number of concurrent threads
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uint32_t numThreads{ 0 };
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// Use push constants to update shader
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// parameters on a per-thread base
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struct ThreadPushConstantBlock {
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glm::mat4 mvp;
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glm::vec3 color;
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};
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struct ObjectData {
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glm::mat4 model;
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glm::vec3 pos;
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glm::vec3 rotation;
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float rotationDir;
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float rotationSpeed;
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float scale;
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float deltaT;
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float stateT = 0;
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bool visible = true;
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};
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struct ThreadData {
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VkCommandPool commandPool{ VK_NULL_HANDLE };
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// One command buffer per render object
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std::vector<VkCommandBuffer> commandBuffer;
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// One push constant block per render object
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std::vector<ThreadPushConstantBlock> pushConstBlock;
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// Per object information (position, rotation, etc.)
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std::vector<ObjectData> objectData;
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};
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std::vector<ThreadData> threadData;
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vks::ThreadPool threadPool;
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// Fence to wait for all command buffers to finish before
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// presenting to the swap chain
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VkFence renderFence{ VK_NULL_HANDLE };
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// View frustum for culling invisible objects
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vks::Frustum frustum;
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std::default_random_engine rndEngine;
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VulkanExample() : VulkanExampleBase()
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{
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title = "Multi threaded command buffer";
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camera.type = Camera::CameraType::lookat;
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camera.setPosition(glm::vec3(0.0f, -0.0f, -32.5f));
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camera.setRotation(glm::vec3(0.0f));
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camera.setRotationSpeed(0.5f);
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camera.setPerspective(60.0f, (float)width / (float)height, 0.1f, 256.0f);
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// Get number of max. concurrent threads
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numThreads = std::thread::hardware_concurrency();
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assert(numThreads > 0);
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#if defined(__ANDROID__)
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LOGD("numThreads = %d", numThreads);
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#else
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std::cout << "numThreads = " << numThreads << std::endl;
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#endif
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threadPool.setThreadCount(numThreads);
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numObjectsPerThread = 512 / numThreads;
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rndEngine.seed(benchmark.active ? 0 : (unsigned)time(nullptr));
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}
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~VulkanExample()
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{
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if (device) {
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vkDestroyPipeline(device, pipelines.phong, nullptr);
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vkDestroyPipeline(device, pipelines.starsphere, nullptr);
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vkDestroyPipelineLayout(device, pipelineLayout, nullptr);
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for (auto& thread : threadData) {
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vkFreeCommandBuffers(device, thread.commandPool, static_cast<uint32_t>(thread.commandBuffer.size()), thread.commandBuffer.data());
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vkDestroyCommandPool(device, thread.commandPool, nullptr);
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}
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vkDestroyFence(device, renderFence, nullptr);
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}
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}
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float rnd(float range)
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{
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std::uniform_real_distribution<float> rndDist(0.0f, range);
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return rndDist(rndEngine);
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}
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// Create all threads and initialize shader push constants
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void prepareMultiThreadedRenderer()
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{
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// Since this demo updates the command buffers on each frame
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// we don't use the per-framebuffer command buffers from the
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// base class, and create a single primary command buffer instead
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VkCommandBufferAllocateInfo cmdBufAllocateInfo =
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vks::initializers::commandBufferAllocateInfo(
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cmdPool,
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VK_COMMAND_BUFFER_LEVEL_PRIMARY,
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1);
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VK_CHECK_RESULT(vkAllocateCommandBuffers(device, &cmdBufAllocateInfo, &primaryCommandBuffer));
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// Create additional secondary CBs for background and ui
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cmdBufAllocateInfo.level = VK_COMMAND_BUFFER_LEVEL_SECONDARY;
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VK_CHECK_RESULT(vkAllocateCommandBuffers(device, &cmdBufAllocateInfo, &secondaryCommandBuffers.background));
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VK_CHECK_RESULT(vkAllocateCommandBuffers(device, &cmdBufAllocateInfo, &secondaryCommandBuffers.ui));
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threadData.resize(numThreads);
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float maxX = static_cast<float>(std::floor(std::sqrt(numThreads * numObjectsPerThread)));
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uint32_t posX = 0;
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uint32_t posZ = 0;
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for (uint32_t i = 0; i < numThreads; i++) {
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ThreadData *thread = &threadData[i];
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// Create one command pool for each thread
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VkCommandPoolCreateInfo cmdPoolInfo = vks::initializers::commandPoolCreateInfo();
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cmdPoolInfo.queueFamilyIndex = swapChain.queueNodeIndex;
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cmdPoolInfo.flags = VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT;
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VK_CHECK_RESULT(vkCreateCommandPool(device, &cmdPoolInfo, nullptr, &thread->commandPool));
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// One secondary command buffer per object that is updated by this thread
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thread->commandBuffer.resize(numObjectsPerThread);
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// Generate secondary command buffers for each thread
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VkCommandBufferAllocateInfo secondaryCmdBufAllocateInfo =
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vks::initializers::commandBufferAllocateInfo(
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thread->commandPool,
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VK_COMMAND_BUFFER_LEVEL_SECONDARY,
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static_cast<uint32_t>(thread->commandBuffer.size()));
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VK_CHECK_RESULT(vkAllocateCommandBuffers(device, &secondaryCmdBufAllocateInfo, thread->commandBuffer.data()));
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thread->pushConstBlock.resize(numObjectsPerThread);
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thread->objectData.resize(numObjectsPerThread);
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for (uint32_t j = 0; j < numObjectsPerThread; j++) {
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float theta = 2.0f * float(M_PI) * rnd(1.0f);
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float phi = acos(1.0f - 2.0f * rnd(1.0f));
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thread->objectData[j].pos = glm::vec3(sin(phi) * cos(theta), 0.0f, cos(phi)) * 35.0f;
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thread->objectData[j].rotation = glm::vec3(0.0f, rnd(360.0f), 0.0f);
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thread->objectData[j].deltaT = rnd(1.0f);
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thread->objectData[j].rotationDir = (rnd(100.0f) < 50.0f) ? 1.0f : -1.0f;
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thread->objectData[j].rotationSpeed = (2.0f + rnd(4.0f)) * thread->objectData[j].rotationDir;
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thread->objectData[j].scale = 0.75f + rnd(0.5f);
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thread->pushConstBlock[j].color = glm::vec3(rnd(1.0f), rnd(1.0f), rnd(1.0f));
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}
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}
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}
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// Builds the secondary command buffer for each thread
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void threadRenderCode(uint32_t threadIndex, uint32_t cmdBufferIndex, VkCommandBufferInheritanceInfo inheritanceInfo)
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{
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ThreadData *thread = &threadData[threadIndex];
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ObjectData *objectData = &thread->objectData[cmdBufferIndex];
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// Check visibility against view frustum using a simple sphere check based on the radius of the mesh
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objectData->visible = frustum.checkSphere(objectData->pos, models.ufo.dimensions.radius * 0.5f);
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if (!objectData->visible)
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{
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return;
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}
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VkCommandBufferBeginInfo commandBufferBeginInfo = vks::initializers::commandBufferBeginInfo();
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commandBufferBeginInfo.flags = VK_COMMAND_BUFFER_USAGE_RENDER_PASS_CONTINUE_BIT;
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commandBufferBeginInfo.pInheritanceInfo = &inheritanceInfo;
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VkCommandBuffer cmdBuffer = thread->commandBuffer[cmdBufferIndex];
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VK_CHECK_RESULT(vkBeginCommandBuffer(cmdBuffer, &commandBufferBeginInfo));
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VkViewport viewport = vks::initializers::viewport((float)width, (float)height, 0.0f, 1.0f);
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vkCmdSetViewport(cmdBuffer, 0, 1, &viewport);
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VkRect2D scissor = vks::initializers::rect2D(width, height, 0, 0);
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vkCmdSetScissor(cmdBuffer, 0, 1, &scissor);
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vkCmdBindPipeline(cmdBuffer, VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.phong);
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// Update
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if (!paused) {
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objectData->rotation.y += 2.5f * objectData->rotationSpeed * frameTimer;
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if (objectData->rotation.y > 360.0f) {
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objectData->rotation.y -= 360.0f;
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}
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objectData->deltaT += 0.15f * frameTimer;
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if (objectData->deltaT > 1.0f)
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objectData->deltaT -= 1.0f;
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objectData->pos.y = sin(glm::radians(objectData->deltaT * 360.0f)) * 2.5f;
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}
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objectData->model = glm::translate(glm::mat4(1.0f), objectData->pos);
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objectData->model = glm::rotate(objectData->model, -sinf(glm::radians(objectData->deltaT * 360.0f)) * 0.25f, glm::vec3(objectData->rotationDir, 0.0f, 0.0f));
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objectData->model = glm::rotate(objectData->model, glm::radians(objectData->rotation.y), glm::vec3(0.0f, objectData->rotationDir, 0.0f));
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objectData->model = glm::rotate(objectData->model, glm::radians(objectData->deltaT * 360.0f), glm::vec3(0.0f, objectData->rotationDir, 0.0f));
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objectData->model = glm::scale(objectData->model, glm::vec3(objectData->scale));
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thread->pushConstBlock[cmdBufferIndex].mvp = matrices.projection * matrices.view * objectData->model;
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// Update shader push constant block
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// Contains model view matrix
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vkCmdPushConstants(
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cmdBuffer,
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pipelineLayout,
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VK_SHADER_STAGE_VERTEX_BIT,
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0,
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sizeof(ThreadPushConstantBlock),
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&thread->pushConstBlock[cmdBufferIndex]);
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VkDeviceSize offsets[1] = { 0 };
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vkCmdBindVertexBuffers(cmdBuffer, 0, 1, &models.ufo.vertices.buffer, offsets);
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vkCmdBindIndexBuffer(cmdBuffer, models.ufo.indices.buffer, 0, VK_INDEX_TYPE_UINT32);
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vkCmdDrawIndexed(cmdBuffer, models.ufo.indices.count, 1, 0, 0, 0);
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VK_CHECK_RESULT(vkEndCommandBuffer(cmdBuffer));
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}
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void updateSecondaryCommandBuffers(VkCommandBufferInheritanceInfo inheritanceInfo)
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{
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// Secondary command buffer for the sky sphere
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VkCommandBufferBeginInfo commandBufferBeginInfo = vks::initializers::commandBufferBeginInfo();
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commandBufferBeginInfo.flags = VK_COMMAND_BUFFER_USAGE_RENDER_PASS_CONTINUE_BIT;
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commandBufferBeginInfo.pInheritanceInfo = &inheritanceInfo;
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VkViewport viewport = vks::initializers::viewport((float)width, (float)height, 0.0f, 1.0f);
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VkRect2D scissor = vks::initializers::rect2D(width, height, 0, 0);
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/*
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Background
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*/
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VK_CHECK_RESULT(vkBeginCommandBuffer(secondaryCommandBuffers.background, &commandBufferBeginInfo));
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vkCmdSetViewport(secondaryCommandBuffers.background, 0, 1, &viewport);
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vkCmdSetScissor(secondaryCommandBuffers.background, 0, 1, &scissor);
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vkCmdBindPipeline(secondaryCommandBuffers.background, VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.starsphere);
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glm::mat4 mvp = matrices.projection * matrices.view;
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mvp[3] = glm::vec4(0.0f, 0.0f, 0.0f, 1.0f);
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mvp = glm::scale(mvp, glm::vec3(2.0f));
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vkCmdPushConstants(
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secondaryCommandBuffers.background,
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pipelineLayout,
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VK_SHADER_STAGE_VERTEX_BIT,
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0,
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sizeof(mvp),
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&mvp);
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models.starSphere.draw(secondaryCommandBuffers.background);
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VK_CHECK_RESULT(vkEndCommandBuffer(secondaryCommandBuffers.background));
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/*
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User interface
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With VK_SUBPASS_CONTENTS_SECONDARY_COMMAND_BUFFERS, the primary command buffer's content has to be defined
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by secondary command buffers, which also applies to the UI overlay command buffer
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*/
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VK_CHECK_RESULT(vkBeginCommandBuffer(secondaryCommandBuffers.ui, &commandBufferBeginInfo));
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vkCmdSetViewport(secondaryCommandBuffers.ui, 0, 1, &viewport);
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vkCmdSetScissor(secondaryCommandBuffers.ui, 0, 1, &scissor);
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vkCmdBindPipeline(secondaryCommandBuffers.ui, VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.starsphere);
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drawUI(secondaryCommandBuffers.ui);
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VK_CHECK_RESULT(vkEndCommandBuffer(secondaryCommandBuffers.ui));
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}
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// Updates the secondary command buffers using a thread pool
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// and puts them into the primary command buffer that's
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// lat submitted to the queue for rendering
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void updateCommandBuffers(VkFramebuffer frameBuffer)
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{
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// Contains the list of secondary command buffers to be submitted
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std::vector<VkCommandBuffer> commandBuffers;
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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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renderPassBeginInfo.framebuffer = frameBuffer;
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// Set target frame buffer
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VK_CHECK_RESULT(vkBeginCommandBuffer(primaryCommandBuffer, &cmdBufInfo));
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// The primary command buffer does not contain any rendering commands
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// These are stored (and retrieved) from the secondary command buffers
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vkCmdBeginRenderPass(primaryCommandBuffer, &renderPassBeginInfo, VK_SUBPASS_CONTENTS_SECONDARY_COMMAND_BUFFERS);
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// Inheritance info for the secondary command buffers
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VkCommandBufferInheritanceInfo inheritanceInfo = vks::initializers::commandBufferInheritanceInfo();
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inheritanceInfo.renderPass = renderPass;
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// Secondary command buffer also use the currently active framebuffer
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inheritanceInfo.framebuffer = frameBuffer;
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// Update secondary sene command buffers
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updateSecondaryCommandBuffers(inheritanceInfo);
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if (displayStarSphere) {
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commandBuffers.push_back(secondaryCommandBuffers.background);
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}
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// Add a job to the thread's queue for each object to be rendered
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for (uint32_t t = 0; t < numThreads; t++)
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{
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for (uint32_t i = 0; i < numObjectsPerThread; i++)
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{
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threadPool.threads[t]->addJob([=] { threadRenderCode(t, i, inheritanceInfo); });
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}
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}
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threadPool.wait();
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// Only submit if object is within the current view frustum
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for (uint32_t t = 0; t < numThreads; t++)
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{
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for (uint32_t i = 0; i < numObjectsPerThread; i++)
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{
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if (threadData[t].objectData[i].visible)
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{
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commandBuffers.push_back(threadData[t].commandBuffer[i]);
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}
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}
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}
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// Render ui last
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if (UIOverlay.visible) {
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commandBuffers.push_back(secondaryCommandBuffers.ui);
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}
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// Execute render commands from the secondary command buffer
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vkCmdExecuteCommands(primaryCommandBuffer, static_cast<uint32_t>(commandBuffers.size()), commandBuffers.data());
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vkCmdEndRenderPass(primaryCommandBuffer);
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VK_CHECK_RESULT(vkEndCommandBuffer(primaryCommandBuffer));
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}
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void loadAssets()
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{
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const uint32_t glTFLoadingFlags = vkglTF::FileLoadingFlags::PreTransformVertices | vkglTF::FileLoadingFlags::PreMultiplyVertexColors | vkglTF::FileLoadingFlags::FlipY;
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models.ufo.loadFromFile(getAssetPath() + "models/retroufo_red_lowpoly.gltf",vulkanDevice, queue,glTFLoadingFlags);
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models.starSphere.loadFromFile(getAssetPath() + "models/sphere.gltf", vulkanDevice, queue, glTFLoadingFlags);
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}
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void preparePipelines()
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{
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// Layout
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VkPipelineLayoutCreateInfo pPipelineLayoutCreateInfo = vks::initializers::pipelineLayoutCreateInfo(nullptr, 0);
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// Push constants for model matrices
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VkPushConstantRange pushConstantRange = vks::initializers::pushConstantRange(VK_SHADER_STAGE_VERTEX_BIT, sizeof(ThreadPushConstantBlock), 0);
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// Push constant ranges are part of the pipeline layout
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pPipelineLayoutCreateInfo.pushConstantRangeCount = 1;
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pPipelineLayoutCreateInfo.pPushConstantRanges = &pushConstantRange;
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VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pPipelineLayoutCreateInfo, nullptr, &pipelineLayout));
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// Pipelines
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VkPipelineInputAssemblyStateCreateInfo inputAssemblyState = vks::initializers::pipelineInputAssemblyStateCreateInfo(VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST, 0, VK_FALSE);
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VkPipelineRasterizationStateCreateInfo rasterizationState = vks::initializers::pipelineRasterizationStateCreateInfo(VK_POLYGON_MODE_FILL, VK_CULL_MODE_BACK_BIT, VK_FRONT_FACE_COUNTER_CLOCKWISE, 0);
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VkPipelineColorBlendAttachmentState blendAttachmentState = vks::initializers::pipelineColorBlendAttachmentState(0xf, VK_FALSE);
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VkPipelineColorBlendStateCreateInfo colorBlendState = vks::initializers::pipelineColorBlendStateCreateInfo(1, &blendAttachmentState);
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VkPipelineDepthStencilStateCreateInfo depthStencilState = vks::initializers::pipelineDepthStencilStateCreateInfo(VK_TRUE, VK_TRUE, VK_COMPARE_OP_LESS_OR_EQUAL);
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VkPipelineViewportStateCreateInfo viewportState = vks::initializers::pipelineViewportStateCreateInfo(1, 1, 0);
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VkPipelineMultisampleStateCreateInfo multisampleState = vks::initializers::pipelineMultisampleStateCreateInfo(VK_SAMPLE_COUNT_1_BIT, 0);
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std::vector<VkDynamicState> dynamicStateEnables = {VK_DYNAMIC_STATE_VIEWPORT, VK_DYNAMIC_STATE_SCISSOR};
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VkPipelineDynamicStateCreateInfo dynamicState = vks::initializers::pipelineDynamicStateCreateInfo(dynamicStateEnables);
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std::array<VkPipelineShaderStageCreateInfo, 2> shaderStages;
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VkGraphicsPipelineCreateInfo pipelineCI = vks::initializers::pipelineCreateInfo(pipelineLayout, renderPass, 0);
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pipelineCI.pInputAssemblyState = &inputAssemblyState;
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pipelineCI.pRasterizationState = &rasterizationState;
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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::Color});
|
|
|
|
// Object rendering pipeline
|
|
shaderStages[0] = loadShader(getShadersPath() + "multithreading/phong.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
|
|
shaderStages[1] = loadShader(getShadersPath() + "multithreading/phong.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
|
|
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCI, nullptr, &pipelines.phong));
|
|
|
|
// Star sphere rendering pipeline
|
|
rasterizationState.cullMode = VK_CULL_MODE_FRONT_BIT;
|
|
depthStencilState.depthWriteEnable = VK_FALSE;
|
|
shaderStages[0] = loadShader(getShadersPath() + "multithreading/starsphere.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
|
|
shaderStages[1] = loadShader(getShadersPath() + "multithreading/starsphere.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
|
|
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCI, nullptr, &pipelines.starsphere));
|
|
}
|
|
|
|
void updateMatrices()
|
|
{
|
|
matrices.projection = camera.matrices.perspective;
|
|
matrices.view = camera.matrices.view;
|
|
frustum.update(matrices.projection * matrices.view);
|
|
}
|
|
|
|
void prepare()
|
|
{
|
|
VulkanExampleBase::prepare();
|
|
// Create a fence for synchronization
|
|
VkFenceCreateInfo fenceCreateInfo = vks::initializers::fenceCreateInfo(VK_FENCE_CREATE_SIGNALED_BIT);
|
|
vkCreateFence(device, &fenceCreateInfo, nullptr, &renderFence);
|
|
loadAssets();
|
|
preparePipelines();
|
|
prepareMultiThreadedRenderer();
|
|
updateMatrices();
|
|
prepared = true;
|
|
}
|
|
|
|
void draw()
|
|
{
|
|
// Wait for fence to signal that all command buffers are ready
|
|
VkResult fenceRes;
|
|
do {
|
|
fenceRes = vkWaitForFences(device, 1, &renderFence, VK_TRUE, 100000000);
|
|
} while (fenceRes == VK_TIMEOUT);
|
|
VK_CHECK_RESULT(fenceRes);
|
|
vkResetFences(device, 1, &renderFence);
|
|
|
|
VulkanExampleBase::prepareFrame();
|
|
|
|
updateCommandBuffers(frameBuffers[currentBuffer]);
|
|
|
|
submitInfo.commandBufferCount = 1;
|
|
submitInfo.pCommandBuffers = &primaryCommandBuffer;
|
|
|
|
VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, renderFence));
|
|
|
|
VulkanExampleBase::submitFrame();
|
|
}
|
|
|
|
virtual void render()
|
|
{
|
|
if (!prepared)
|
|
return;
|
|
updateMatrices();
|
|
draw();
|
|
}
|
|
|
|
virtual void OnUpdateUIOverlay(vks::UIOverlay *overlay)
|
|
{
|
|
if (overlay->header("Statistics")) {
|
|
overlay->text("Active threads: %d", numThreads);
|
|
}
|
|
if (overlay->header("Settings")) {
|
|
overlay->checkBox("Stars", &displayStarSphere);
|
|
}
|
|
|
|
}
|
|
};
|
|
|
|
VULKAN_EXAMPLE_MAIN()
|