d0211d1f14
Toggling validation via command line arguments is the preferred way anyway Define was also added as a CMake option
820 lines
28 KiB
C++
820 lines
28 KiB
C++
/*
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* Vulkan Example - Attraction based compute shader particle system
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*
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* Updated compute shader by Lukas Bergdoll (https://github.com/Voultapher)
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*
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* Copyright (C) 2016-2021 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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#define VERTEX_BUFFER_BIND_ID 0
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#if defined(__ANDROID__)
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// Lower particle count on Android for performance reasons
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#define PARTICLE_COUNT 128 * 1024
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#else
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#define PARTICLE_COUNT 256 * 1024
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#endif
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class VulkanExample : public VulkanExampleBase
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{
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public:
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float timer = 0.0f;
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float animStart = 20.0f;
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bool attachToCursor = false;
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struct {
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vks::Texture2D particle;
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vks::Texture2D gradient;
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} textures;
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struct {
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VkPipelineVertexInputStateCreateInfo inputState;
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std::vector<VkVertexInputBindingDescription> bindingDescriptions;
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std::vector<VkVertexInputAttributeDescription> attributeDescriptions;
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} vertices;
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// Resources for the graphics part of the example
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struct {
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uint32_t queueFamilyIndex; // Used to check if compute and graphics queue families differ and require additional barriers
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VkDescriptorSetLayout descriptorSetLayout; // Particle system rendering shader binding layout
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VkDescriptorSet descriptorSet; // Particle system rendering shader bindings
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VkPipelineLayout pipelineLayout; // Layout of the graphics pipeline
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VkPipeline pipeline; // Particle rendering pipeline
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VkSemaphore semaphore; // Execution dependency between compute & graphic submission
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} graphics;
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// Resources for the compute part of the example
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struct {
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uint32_t queueFamilyIndex; // Used to check if compute and graphics queue families differ and require additional barriers
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vks::Buffer storageBuffer; // (Shader) storage buffer object containing the particles
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vks::Buffer uniformBuffer; // Uniform buffer object containing particle system parameters
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VkQueue queue; // Separate queue for compute commands (queue family may differ from the one used for graphics)
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VkCommandPool commandPool; // Use a separate command pool (queue family may differ from the one used for graphics)
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VkCommandBuffer commandBuffer; // Command buffer storing the dispatch commands and barriers
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VkSemaphore semaphore; // Execution dependency between compute & graphic submission
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VkDescriptorSetLayout descriptorSetLayout; // Compute shader binding layout
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VkDescriptorSet descriptorSet; // Compute shader bindings
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VkPipelineLayout pipelineLayout; // Layout of the compute pipeline
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VkPipeline pipeline; // Compute pipeline for updating particle positions
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struct computeUBO { // Compute shader uniform block object
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float deltaT; // Frame delta time
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float destX; // x position of the attractor
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float destY; // y position of the attractor
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int32_t particleCount = PARTICLE_COUNT;
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} ubo;
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} compute;
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// SSBO particle declaration
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struct Particle {
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glm::vec2 pos; // Particle position
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glm::vec2 vel; // Particle velocity
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glm::vec4 gradientPos; // Texture coordinates for the gradient ramp map
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};
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VulkanExample() : VulkanExampleBase()
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{
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title = "Compute shader particle system";
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}
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~VulkanExample()
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{
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// Graphics
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vkDestroyPipeline(device, graphics.pipeline, nullptr);
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vkDestroyPipelineLayout(device, graphics.pipelineLayout, nullptr);
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vkDestroyDescriptorSetLayout(device, graphics.descriptorSetLayout, nullptr);
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vkDestroySemaphore(device, graphics.semaphore, nullptr);
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// Compute
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compute.storageBuffer.destroy();
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compute.uniformBuffer.destroy();
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vkDestroyPipelineLayout(device, compute.pipelineLayout, nullptr);
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vkDestroyDescriptorSetLayout(device, compute.descriptorSetLayout, nullptr);
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vkDestroyPipeline(device, compute.pipeline, nullptr);
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vkDestroySemaphore(device, compute.semaphore, nullptr);
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vkDestroyCommandPool(device, compute.commandPool, nullptr);
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textures.particle.destroy();
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textures.gradient.destroy();
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}
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void loadAssets()
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{
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textures.particle.loadFromFile(getAssetPath() + "textures/particle01_rgba.ktx", VK_FORMAT_R8G8B8A8_UNORM, vulkanDevice, queue);
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textures.gradient.loadFromFile(getAssetPath() + "textures/particle_gradient_rgba.ktx", VK_FORMAT_R8G8B8A8_UNORM, vulkanDevice, queue);
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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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{
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// Set target frame buffer
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renderPassBeginInfo.framebuffer = frameBuffers[i];
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VK_CHECK_RESULT(vkBeginCommandBuffer(drawCmdBuffers[i], &cmdBufInfo));
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// Acquire barrier
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if (graphics.queueFamilyIndex != compute.queueFamilyIndex)
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{
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VkBufferMemoryBarrier buffer_barrier =
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{
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VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER,
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nullptr,
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0,
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VK_ACCESS_VERTEX_ATTRIBUTE_READ_BIT,
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compute.queueFamilyIndex,
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graphics.queueFamilyIndex,
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compute.storageBuffer.buffer,
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0,
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compute.storageBuffer.size
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};
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vkCmdPipelineBarrier(
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drawCmdBuffers[i],
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VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT,
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VK_PIPELINE_STAGE_VERTEX_INPUT_BIT,
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0,
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0, nullptr,
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1, &buffer_barrier,
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0, nullptr);
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}
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// Draw the particle system using the update vertex buffer
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vkCmdBeginRenderPass(drawCmdBuffers[i], &renderPassBeginInfo, VK_SUBPASS_CONTENTS_INLINE);
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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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vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, graphics.pipeline);
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vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, graphics.pipelineLayout, 0, 1, &graphics.descriptorSet, 0, NULL);
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VkDeviceSize offsets[1] = { 0 };
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vkCmdBindVertexBuffers(drawCmdBuffers[i], VERTEX_BUFFER_BIND_ID, 1, &compute.storageBuffer.buffer, offsets);
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vkCmdDraw(drawCmdBuffers[i], PARTICLE_COUNT, 1, 0, 0);
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drawUI(drawCmdBuffers[i]);
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vkCmdEndRenderPass(drawCmdBuffers[i]);
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// Release barrier
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if (graphics.queueFamilyIndex != compute.queueFamilyIndex)
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{
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VkBufferMemoryBarrier buffer_barrier =
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{
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VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER,
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nullptr,
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VK_ACCESS_VERTEX_ATTRIBUTE_READ_BIT,
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0,
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graphics.queueFamilyIndex,
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compute.queueFamilyIndex,
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compute.storageBuffer.buffer,
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0,
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compute.storageBuffer.size
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};
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vkCmdPipelineBarrier(
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drawCmdBuffers[i],
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VK_PIPELINE_STAGE_VERTEX_INPUT_BIT,
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VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT,
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0,
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0, nullptr,
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1, &buffer_barrier,
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0, nullptr);
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}
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VK_CHECK_RESULT(vkEndCommandBuffer(drawCmdBuffers[i]));
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}
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}
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void buildComputeCommandBuffer()
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{
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VkCommandBufferBeginInfo cmdBufInfo = vks::initializers::commandBufferBeginInfo();
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VK_CHECK_RESULT(vkBeginCommandBuffer(compute.commandBuffer, &cmdBufInfo));
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// Compute particle movement
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// Add memory barrier to ensure that the (graphics) vertex shader has fetched attributes before compute starts to write to the buffer
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if (graphics.queueFamilyIndex != compute.queueFamilyIndex)
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{
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VkBufferMemoryBarrier buffer_barrier =
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{
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VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER,
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nullptr,
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0,
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VK_ACCESS_SHADER_WRITE_BIT,
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graphics.queueFamilyIndex,
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compute.queueFamilyIndex,
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compute.storageBuffer.buffer,
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0,
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compute.storageBuffer.size
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};
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vkCmdPipelineBarrier(
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compute.commandBuffer,
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VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT,
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VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT,
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0,
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0, nullptr,
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1, &buffer_barrier,
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0, nullptr);
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}
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// Dispatch the compute job
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vkCmdBindPipeline(compute.commandBuffer, VK_PIPELINE_BIND_POINT_COMPUTE, compute.pipeline);
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vkCmdBindDescriptorSets(compute.commandBuffer, VK_PIPELINE_BIND_POINT_COMPUTE, compute.pipelineLayout, 0, 1, &compute.descriptorSet, 0, 0);
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vkCmdDispatch(compute.commandBuffer, PARTICLE_COUNT / 256, 1, 1);
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// Add barrier to ensure that compute shader has finished writing to the buffer
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// Without this the (rendering) vertex shader may display incomplete results (partial data from last frame)
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if (graphics.queueFamilyIndex != compute.queueFamilyIndex)
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{
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VkBufferMemoryBarrier buffer_barrier =
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{
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VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER,
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nullptr,
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VK_ACCESS_SHADER_WRITE_BIT,
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0,
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compute.queueFamilyIndex,
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graphics.queueFamilyIndex,
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compute.storageBuffer.buffer,
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0,
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compute.storageBuffer.size
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};
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vkCmdPipelineBarrier(
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compute.commandBuffer,
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VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT,
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VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT,
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0,
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0, nullptr,
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1, &buffer_barrier,
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0, nullptr);
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}
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vkEndCommandBuffer(compute.commandBuffer);
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}
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// Setup and fill the compute shader storage buffers containing the particles
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void prepareStorageBuffers()
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{
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std::default_random_engine rndEngine(benchmark.active ? 0 : (unsigned)time(nullptr));
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std::uniform_real_distribution<float> rndDist(-1.0f, 1.0f);
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// Initial particle positions
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std::vector<Particle> particleBuffer(PARTICLE_COUNT);
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for (auto& particle : particleBuffer) {
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particle.pos = glm::vec2(rndDist(rndEngine), rndDist(rndEngine));
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particle.vel = glm::vec2(0.0f);
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particle.gradientPos.x = particle.pos.x / 2.0f;
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}
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VkDeviceSize storageBufferSize = particleBuffer.size() * sizeof(Particle);
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// Staging
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// SSBO won't be changed on the host after upload so copy to device local memory
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vks::Buffer stagingBuffer;
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vulkanDevice->createBuffer(
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VK_BUFFER_USAGE_TRANSFER_SRC_BIT,
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VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
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&stagingBuffer,
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storageBufferSize,
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particleBuffer.data());
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vulkanDevice->createBuffer(
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// The SSBO will be used as a storage buffer for the compute pipeline and as a vertex buffer in the graphics pipeline
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VK_BUFFER_USAGE_VERTEX_BUFFER_BIT | VK_BUFFER_USAGE_STORAGE_BUFFER_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT,
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VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT,
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&compute.storageBuffer,
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storageBufferSize);
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// Copy from staging buffer to storage buffer
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VkCommandBuffer copyCmd = vulkanDevice->createCommandBuffer(VK_COMMAND_BUFFER_LEVEL_PRIMARY, true);
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VkBufferCopy copyRegion = {};
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copyRegion.size = storageBufferSize;
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vkCmdCopyBuffer(copyCmd, stagingBuffer.buffer, compute.storageBuffer.buffer, 1, ©Region);
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// Execute a transfer barrier to the compute queue, if necessary
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if (graphics.queueFamilyIndex != compute.queueFamilyIndex)
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{
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VkBufferMemoryBarrier buffer_barrier =
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{
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VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER,
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nullptr,
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VK_ACCESS_VERTEX_ATTRIBUTE_READ_BIT,
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0,
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graphics.queueFamilyIndex,
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compute.queueFamilyIndex,
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compute.storageBuffer.buffer,
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0,
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compute.storageBuffer.size
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};
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vkCmdPipelineBarrier(
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copyCmd,
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VK_PIPELINE_STAGE_VERTEX_INPUT_BIT,
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VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT,
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0,
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0, nullptr,
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1, &buffer_barrier,
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0, nullptr);
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}
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vulkanDevice->flushCommandBuffer(copyCmd, queue, true);
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stagingBuffer.destroy();
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// Binding description
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vertices.bindingDescriptions.resize(1);
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vertices.bindingDescriptions[0] =
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vks::initializers::vertexInputBindingDescription(
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VERTEX_BUFFER_BIND_ID,
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sizeof(Particle),
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VK_VERTEX_INPUT_RATE_VERTEX);
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// Attribute descriptions
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// Describes memory layout and shader positions
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vertices.attributeDescriptions.resize(2);
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// Location 0 : Position
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vertices.attributeDescriptions[0] =
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vks::initializers::vertexInputAttributeDescription(
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VERTEX_BUFFER_BIND_ID,
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0,
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VK_FORMAT_R32G32_SFLOAT,
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offsetof(Particle, pos));
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// Location 1 : Gradient position
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vertices.attributeDescriptions[1] =
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vks::initializers::vertexInputAttributeDescription(
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VERTEX_BUFFER_BIND_ID,
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1,
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VK_FORMAT_R32G32B32A32_SFLOAT,
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offsetof(Particle, gradientPos));
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// Assign to vertex buffer
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vertices.inputState = vks::initializers::pipelineVertexInputStateCreateInfo();
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vertices.inputState.vertexBindingDescriptionCount = static_cast<uint32_t>(vertices.bindingDescriptions.size());
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vertices.inputState.pVertexBindingDescriptions = vertices.bindingDescriptions.data();
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vertices.inputState.vertexAttributeDescriptionCount = static_cast<uint32_t>(vertices.attributeDescriptions.size());
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vertices.inputState.pVertexAttributeDescriptions = vertices.attributeDescriptions.data();
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}
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void setupDescriptorPool()
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{
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std::vector<VkDescriptorPoolSize> poolSizes =
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{
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vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1),
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vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_STORAGE_BUFFER, 1),
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vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 2)
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};
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VkDescriptorPoolCreateInfo descriptorPoolInfo =
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vks::initializers::descriptorPoolCreateInfo(
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static_cast<uint32_t>(poolSizes.size()),
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poolSizes.data(),
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2);
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VK_CHECK_RESULT(vkCreateDescriptorPool(device, &descriptorPoolInfo, nullptr, &descriptorPool));
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}
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void setupDescriptorSetLayout()
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{
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std::vector<VkDescriptorSetLayoutBinding> setLayoutBindings;
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// Binding 0 : Particle color map
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setLayoutBindings.push_back(vks::initializers::descriptorSetLayoutBinding(
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VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
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VK_SHADER_STAGE_FRAGMENT_BIT,
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0));
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// Binding 1 : Particle gradient ramp
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setLayoutBindings.push_back(vks::initializers::descriptorSetLayoutBinding(
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VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
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VK_SHADER_STAGE_FRAGMENT_BIT,
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1));
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VkDescriptorSetLayoutCreateInfo descriptorLayout =
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vks::initializers::descriptorSetLayoutCreateInfo(
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setLayoutBindings.data(),
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static_cast<uint32_t>(setLayoutBindings.size()));
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VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorLayout, nullptr, &graphics.descriptorSetLayout));
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VkPipelineLayoutCreateInfo pipelineLayoutCreateInfo =
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vks::initializers::pipelineLayoutCreateInfo(
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&graphics.descriptorSetLayout,
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1);
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VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pipelineLayoutCreateInfo, nullptr, &graphics.pipelineLayout));
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}
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void setupDescriptorSet()
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{
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VkDescriptorSetAllocateInfo allocInfo =
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vks::initializers::descriptorSetAllocateInfo(
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descriptorPool,
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&graphics.descriptorSetLayout,
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1);
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VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &graphics.descriptorSet));
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std::vector<VkWriteDescriptorSet> writeDescriptorSets;
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// Binding 0 : Particle color map
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writeDescriptorSets.push_back(vks::initializers::writeDescriptorSet(
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graphics.descriptorSet,
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VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
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0,
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&textures.particle.descriptor));
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// Binding 1 : Particle gradient ramp
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writeDescriptorSets.push_back(vks::initializers::writeDescriptorSet(
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graphics.descriptorSet,
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VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
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1,
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&textures.gradient.descriptor));
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vkUpdateDescriptorSets(device, static_cast<uint32_t>(writeDescriptorSets.size()), writeDescriptorSets.data(), 0, NULL);
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}
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void preparePipelines()
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{
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VkPipelineInputAssemblyStateCreateInfo inputAssemblyState =
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vks::initializers::pipelineInputAssemblyStateCreateInfo(
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VK_PRIMITIVE_TOPOLOGY_POINT_LIST,
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0,
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VK_FALSE);
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VkPipelineRasterizationStateCreateInfo rasterizationState =
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vks::initializers::pipelineRasterizationStateCreateInfo(
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VK_POLYGON_MODE_FILL,
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VK_CULL_MODE_NONE,
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VK_FRONT_FACE_COUNTER_CLOCKWISE,
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0);
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VkPipelineColorBlendAttachmentState blendAttachmentState =
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vks::initializers::pipelineColorBlendAttachmentState(
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0xf,
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VK_FALSE);
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VkPipelineColorBlendStateCreateInfo colorBlendState =
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vks::initializers::pipelineColorBlendStateCreateInfo(
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1,
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&blendAttachmentState);
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VkPipelineDepthStencilStateCreateInfo depthStencilState =
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vks::initializers::pipelineDepthStencilStateCreateInfo(
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VK_FALSE,
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VK_FALSE,
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VK_COMPARE_OP_ALWAYS);
|
|
|
|
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.data(),
|
|
static_cast<uint32_t>(dynamicStateEnables.size()),
|
|
0);
|
|
|
|
// Rendering pipeline
|
|
// Load shaders
|
|
std::array<VkPipelineShaderStageCreateInfo,2> shaderStages;
|
|
|
|
shaderStages[0] = loadShader(getShadersPath() + "computeparticles/particle.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
|
|
shaderStages[1] = loadShader(getShadersPath() + "computeparticles/particle.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
|
|
|
|
VkGraphicsPipelineCreateInfo pipelineCreateInfo =
|
|
vks::initializers::pipelineCreateInfo(
|
|
graphics.pipelineLayout,
|
|
renderPass,
|
|
0);
|
|
|
|
pipelineCreateInfo.pVertexInputState = &vertices.inputState;
|
|
pipelineCreateInfo.pInputAssemblyState = &inputAssemblyState;
|
|
pipelineCreateInfo.pRasterizationState = &rasterizationState;
|
|
pipelineCreateInfo.pColorBlendState = &colorBlendState;
|
|
pipelineCreateInfo.pMultisampleState = &multisampleState;
|
|
pipelineCreateInfo.pViewportState = &viewportState;
|
|
pipelineCreateInfo.pDepthStencilState = &depthStencilState;
|
|
pipelineCreateInfo.pDynamicState = &dynamicState;
|
|
pipelineCreateInfo.stageCount = static_cast<uint32_t>(shaderStages.size());
|
|
pipelineCreateInfo.pStages = shaderStages.data();
|
|
pipelineCreateInfo.renderPass = renderPass;
|
|
|
|
// Additive blending
|
|
blendAttachmentState.colorWriteMask = 0xF;
|
|
blendAttachmentState.blendEnable = VK_TRUE;
|
|
blendAttachmentState.colorBlendOp = VK_BLEND_OP_ADD;
|
|
blendAttachmentState.srcColorBlendFactor = VK_BLEND_FACTOR_ONE;
|
|
blendAttachmentState.dstColorBlendFactor = VK_BLEND_FACTOR_ONE;
|
|
blendAttachmentState.alphaBlendOp = VK_BLEND_OP_ADD;
|
|
blendAttachmentState.srcAlphaBlendFactor = VK_BLEND_FACTOR_SRC_ALPHA;
|
|
blendAttachmentState.dstAlphaBlendFactor = VK_BLEND_FACTOR_DST_ALPHA;
|
|
|
|
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &graphics.pipeline));
|
|
}
|
|
|
|
void prepareGraphics()
|
|
{
|
|
prepareStorageBuffers();
|
|
prepareUniformBuffers();
|
|
setupDescriptorSetLayout();
|
|
preparePipelines();
|
|
setupDescriptorSet();
|
|
|
|
// Semaphore for compute & graphics sync
|
|
VkSemaphoreCreateInfo semaphoreCreateInfo = vks::initializers::semaphoreCreateInfo();
|
|
VK_CHECK_RESULT(vkCreateSemaphore(device, &semaphoreCreateInfo, nullptr, &graphics.semaphore));
|
|
|
|
// Signal the semaphore
|
|
VkSubmitInfo submitInfo = vks::initializers::submitInfo();
|
|
submitInfo.signalSemaphoreCount = 1;
|
|
submitInfo.pSignalSemaphores = &graphics.semaphore;
|
|
VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE));
|
|
VK_CHECK_RESULT(vkQueueWaitIdle(queue));
|
|
}
|
|
|
|
void prepareCompute()
|
|
{
|
|
// Create a compute capable device queue
|
|
// The VulkanDevice::createLogicalDevice functions finds a compute capable queue and prefers queue families that only support compute
|
|
// Depending on the implementation this may result in different queue family indices for graphics and computes,
|
|
// requiring proper synchronization (see the memory and pipeline barriers)
|
|
vkGetDeviceQueue(device, compute.queueFamilyIndex, 0, &compute.queue);
|
|
|
|
// Create compute pipeline
|
|
// Compute pipelines are created separate from graphics pipelines even if they use the same queue (family index)
|
|
|
|
std::vector<VkDescriptorSetLayoutBinding> setLayoutBindings = {
|
|
// Binding 0 : Particle position storage buffer
|
|
vks::initializers::descriptorSetLayoutBinding(
|
|
VK_DESCRIPTOR_TYPE_STORAGE_BUFFER,
|
|
VK_SHADER_STAGE_COMPUTE_BIT,
|
|
0),
|
|
// Binding 1 : Uniform buffer
|
|
vks::initializers::descriptorSetLayoutBinding(
|
|
VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
|
|
VK_SHADER_STAGE_COMPUTE_BIT,
|
|
1),
|
|
};
|
|
|
|
VkDescriptorSetLayoutCreateInfo descriptorLayout =
|
|
vks::initializers::descriptorSetLayoutCreateInfo(
|
|
setLayoutBindings.data(),
|
|
static_cast<uint32_t>(setLayoutBindings.size()));
|
|
|
|
VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorLayout, nullptr, &compute.descriptorSetLayout));
|
|
|
|
VkPipelineLayoutCreateInfo pPipelineLayoutCreateInfo =
|
|
vks::initializers::pipelineLayoutCreateInfo(
|
|
&compute.descriptorSetLayout,
|
|
1);
|
|
|
|
VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pPipelineLayoutCreateInfo, nullptr, &compute.pipelineLayout));
|
|
|
|
VkDescriptorSetAllocateInfo allocInfo =
|
|
vks::initializers::descriptorSetAllocateInfo(
|
|
descriptorPool,
|
|
&compute.descriptorSetLayout,
|
|
1);
|
|
|
|
VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &compute.descriptorSet));
|
|
|
|
std::vector<VkWriteDescriptorSet> computeWriteDescriptorSets =
|
|
{
|
|
// Binding 0 : Particle position storage buffer
|
|
vks::initializers::writeDescriptorSet(
|
|
compute.descriptorSet,
|
|
VK_DESCRIPTOR_TYPE_STORAGE_BUFFER,
|
|
0,
|
|
&compute.storageBuffer.descriptor),
|
|
// Binding 1 : Uniform buffer
|
|
vks::initializers::writeDescriptorSet(
|
|
compute.descriptorSet,
|
|
VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
|
|
1,
|
|
&compute.uniformBuffer.descriptor)
|
|
};
|
|
|
|
vkUpdateDescriptorSets(device, static_cast<uint32_t>(computeWriteDescriptorSets.size()), computeWriteDescriptorSets.data(), 0, NULL);
|
|
|
|
// Create pipeline
|
|
VkComputePipelineCreateInfo computePipelineCreateInfo = vks::initializers::computePipelineCreateInfo(compute.pipelineLayout, 0);
|
|
computePipelineCreateInfo.stage = loadShader(getShadersPath() + "computeparticles/particle.comp.spv", VK_SHADER_STAGE_COMPUTE_BIT);
|
|
VK_CHECK_RESULT(vkCreateComputePipelines(device, pipelineCache, 1, &computePipelineCreateInfo, nullptr, &compute.pipeline));
|
|
|
|
// Separate command pool as queue family for compute may be different than graphics
|
|
VkCommandPoolCreateInfo cmdPoolInfo = {};
|
|
cmdPoolInfo.sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO;
|
|
cmdPoolInfo.queueFamilyIndex = compute.queueFamilyIndex;
|
|
cmdPoolInfo.flags = VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT;
|
|
VK_CHECK_RESULT(vkCreateCommandPool(device, &cmdPoolInfo, nullptr, &compute.commandPool));
|
|
|
|
// Create a command buffer for compute operations
|
|
compute.commandBuffer = vulkanDevice->createCommandBuffer(VK_COMMAND_BUFFER_LEVEL_PRIMARY, compute.commandPool);
|
|
|
|
// Semaphore for compute & graphics sync
|
|
VkSemaphoreCreateInfo semaphoreCreateInfo = vks::initializers::semaphoreCreateInfo();
|
|
VK_CHECK_RESULT(vkCreateSemaphore(device, &semaphoreCreateInfo, nullptr, &compute.semaphore));
|
|
|
|
// Build a single command buffer containing the compute dispatch commands
|
|
buildComputeCommandBuffer();
|
|
|
|
// SRS - By reordering compute and graphics within draw(), the following code is no longer needed:
|
|
// If graphics and compute queue family indices differ, acquire and immediately release the storage buffer, so that the initial acquire from the graphics command buffers are matched up properly
|
|
/*
|
|
if (graphics.queueFamilyIndex != compute.queueFamilyIndex)
|
|
{
|
|
// Create a transient command buffer for setting up the initial buffer transfer state
|
|
VkCommandBuffer transferCmd = vulkanDevice->createCommandBuffer(VK_COMMAND_BUFFER_LEVEL_PRIMARY, compute.commandPool, true);
|
|
|
|
VkBufferMemoryBarrier acquire_buffer_barrier =
|
|
{
|
|
VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER,
|
|
nullptr,
|
|
0,
|
|
VK_ACCESS_SHADER_WRITE_BIT,
|
|
graphics.queueFamilyIndex,
|
|
compute.queueFamilyIndex,
|
|
compute.storageBuffer.buffer,
|
|
0,
|
|
compute.storageBuffer.size
|
|
};
|
|
vkCmdPipelineBarrier(
|
|
transferCmd,
|
|
VK_PIPELINE_STAGE_VERTEX_INPUT_BIT,
|
|
VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT,
|
|
0,
|
|
0, nullptr,
|
|
1, &acquire_buffer_barrier,
|
|
0, nullptr);
|
|
|
|
VkBufferMemoryBarrier release_buffer_barrier =
|
|
{
|
|
VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER,
|
|
nullptr,
|
|
VK_ACCESS_SHADER_WRITE_BIT,
|
|
0,
|
|
compute.queueFamilyIndex,
|
|
graphics.queueFamilyIndex,
|
|
compute.storageBuffer.buffer,
|
|
0,
|
|
compute.storageBuffer.size
|
|
};
|
|
vkCmdPipelineBarrier(
|
|
transferCmd,
|
|
VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT,
|
|
VK_PIPELINE_STAGE_VERTEX_INPUT_BIT,
|
|
0,
|
|
0, nullptr,
|
|
1, &release_buffer_barrier,
|
|
0, nullptr);
|
|
|
|
vulkanDevice->flushCommandBuffer(transferCmd, compute.queue, compute.commandPool);
|
|
}
|
|
*/
|
|
}
|
|
|
|
// Prepare and initialize uniform buffer containing shader uniforms
|
|
void prepareUniformBuffers()
|
|
{
|
|
// Compute shader uniform buffer block
|
|
vulkanDevice->createBuffer(
|
|
VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
|
|
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
|
|
&compute.uniformBuffer,
|
|
sizeof(compute.ubo));
|
|
|
|
// Map for host access
|
|
VK_CHECK_RESULT(compute.uniformBuffer.map());
|
|
|
|
updateUniformBuffers();
|
|
}
|
|
|
|
void updateUniformBuffers()
|
|
{
|
|
compute.ubo.deltaT = paused ? 0.0f : frameTimer * 2.5f;
|
|
if (!attachToCursor)
|
|
{
|
|
compute.ubo.destX = sin(glm::radians(timer * 360.0f)) * 0.75f;
|
|
compute.ubo.destY = 0.0f;
|
|
}
|
|
else
|
|
{
|
|
float normalizedMx = (mousePos.x - static_cast<float>(width / 2)) / static_cast<float>(width / 2);
|
|
float normalizedMy = (mousePos.y - static_cast<float>(height / 2)) / static_cast<float>(height / 2);
|
|
compute.ubo.destX = normalizedMx;
|
|
compute.ubo.destY = normalizedMy;
|
|
}
|
|
|
|
memcpy(compute.uniformBuffer.mapped, &compute.ubo, sizeof(compute.ubo));
|
|
}
|
|
|
|
void draw()
|
|
{
|
|
// Wait for rendering finished
|
|
VkPipelineStageFlags waitStageMask = VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT;
|
|
|
|
// Submit compute commands
|
|
VkSubmitInfo computeSubmitInfo = vks::initializers::submitInfo();
|
|
computeSubmitInfo.commandBufferCount = 1;
|
|
computeSubmitInfo.pCommandBuffers = &compute.commandBuffer;
|
|
computeSubmitInfo.waitSemaphoreCount = 1;
|
|
computeSubmitInfo.pWaitSemaphores = &graphics.semaphore;
|
|
computeSubmitInfo.pWaitDstStageMask = &waitStageMask;
|
|
computeSubmitInfo.signalSemaphoreCount = 1;
|
|
computeSubmitInfo.pSignalSemaphores = &compute.semaphore;
|
|
VK_CHECK_RESULT(vkQueueSubmit(compute.queue, 1, &computeSubmitInfo, VK_NULL_HANDLE));
|
|
|
|
VulkanExampleBase::prepareFrame();
|
|
|
|
VkPipelineStageFlags graphicsWaitStageMasks[] = { VK_PIPELINE_STAGE_VERTEX_INPUT_BIT, VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT };
|
|
VkSemaphore graphicsWaitSemaphores[] = { compute.semaphore, semaphores.presentComplete };
|
|
VkSemaphore graphicsSignalSemaphores[] = { graphics.semaphore, semaphores.renderComplete };
|
|
|
|
// Submit graphics commands
|
|
submitInfo.commandBufferCount = 1;
|
|
submitInfo.pCommandBuffers = &drawCmdBuffers[currentBuffer];
|
|
submitInfo.waitSemaphoreCount = 2;
|
|
submitInfo.pWaitSemaphores = graphicsWaitSemaphores;
|
|
submitInfo.pWaitDstStageMask = graphicsWaitStageMasks;
|
|
submitInfo.signalSemaphoreCount = 2;
|
|
submitInfo.pSignalSemaphores = graphicsSignalSemaphores;
|
|
VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE));
|
|
|
|
VulkanExampleBase::submitFrame();
|
|
}
|
|
|
|
void prepare()
|
|
{
|
|
VulkanExampleBase::prepare();
|
|
// We will be using the queue family indices to check if graphics and compute queue families differ
|
|
// If that's the case, we need additional barriers for acquiring and releasing resources
|
|
graphics.queueFamilyIndex = vulkanDevice->queueFamilyIndices.graphics;
|
|
compute.queueFamilyIndex = vulkanDevice->queueFamilyIndices.compute;
|
|
loadAssets();
|
|
setupDescriptorPool();
|
|
prepareGraphics();
|
|
prepareCompute();
|
|
buildCommandBuffers();
|
|
prepared = true;
|
|
}
|
|
|
|
virtual void render()
|
|
{
|
|
if (!prepared)
|
|
return;
|
|
draw();
|
|
|
|
if (!attachToCursor)
|
|
{
|
|
if (animStart > 0.0f)
|
|
{
|
|
animStart -= frameTimer * 5.0f;
|
|
}
|
|
else if (animStart <= 0.0f)
|
|
{
|
|
timer += frameTimer * 0.04f;
|
|
if (timer > 1.f)
|
|
timer = 0.f;
|
|
}
|
|
}
|
|
|
|
updateUniformBuffers();
|
|
}
|
|
|
|
virtual void OnUpdateUIOverlay(vks::UIOverlay *overlay)
|
|
{
|
|
if (overlay->header("Settings")) {
|
|
overlay->checkBox("Attach attractor to cursor", &attachToCursor);
|
|
}
|
|
}
|
|
};
|
|
|
|
VULKAN_EXAMPLE_MAIN()
|