Moved example source files into sub folder
This commit is contained in:
saschawillems
parent
a17e3924b3
commit
94a076e1ae
69 changed files with 685 additions and 164 deletions
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/*
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* Vulkan Example - Dynamic uniform buffers
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*
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* Copyright (C) 2016 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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* Summary:
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* Demonstrates the use of dynamic uniform buffers.
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*
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* Instead of using one uniform buffer per-object, this example allocates one big uniform buffer
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* with respect to the alignment reported by the device via minUniformBufferOffsetAlignment that
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* contains all matrices for the objects in the scene.
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*
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* The used descriptor type VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC then allows to set a dynamic
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* offset used to pass data from the single uniform buffer to the connected shader binding point.
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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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#include <array>
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#include <random>
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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 <vulkan/vulkan.h>
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#include "vulkanexamplebase.h"
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#include "VulkanDevice.hpp"
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#include "VulkanBuffer.hpp"
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#define VERTEX_BUFFER_BIND_ID 0
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#define ENABLE_VALIDATION false
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#define OBJECT_INSTANCES 125
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// Vertex layout for this example
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struct Vertex {
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float pos[3];
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float color[3];
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};
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// Wrapper functions for aligned memory allocation
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// There is currently no standard for this in C++ that works across all platforms and vendors, so we abstract this
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void* alignedAlloc(size_t size, size_t alignment)
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{
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void *data = nullptr;
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#if defined(_MSC_VER) || defined(__MINGW32__)
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data = _aligned_malloc(size, alignment);
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#else
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int res = posix_memalign(&data, alignment, size);
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if (res != 0)
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data = nullptr;
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#endif
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return data;
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}
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void alignedFree(void* data)
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{
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#if defined(_MSC_VER) || defined(__MINGW32__)
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_aligned_free(data);
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#else
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free(data);
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#endif
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}
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class VulkanExample : public VulkanExampleBase
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{
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public:
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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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vks::Buffer vertexBuffer;
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vks::Buffer indexBuffer;
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uint32_t indexCount;
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struct {
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vks::Buffer view;
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vks::Buffer dynamic;
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} uniformBuffers;
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struct {
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glm::mat4 projection;
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glm::mat4 view;
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} uboVS;
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// Store random per-object rotations
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glm::vec3 rotations[OBJECT_INSTANCES];
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glm::vec3 rotationSpeeds[OBJECT_INSTANCES];
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// One big uniform buffer that contains all matrices
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// Note that we need to manually allocate the data to cope for GPU-specific uniform buffer offset alignments
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struct UboDataDynamic {
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glm::mat4 *model = nullptr;
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} uboDataDynamic;
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VkPipeline pipeline;
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VkPipelineLayout pipelineLayout;
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VkDescriptorSet descriptorSet;
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VkDescriptorSetLayout descriptorSetLayout;
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float animationTimer = 0.0f;
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size_t dynamicAlignment;
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VulkanExample() : VulkanExampleBase(ENABLE_VALIDATION)
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{
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title = "Vulkan Example - Dynamic uniform buffers";
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camera.type = Camera::CameraType::lookat;
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camera.setPosition(glm::vec3(0.0f, 0.0f, -30.0f));
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camera.setRotation(glm::vec3(0.0f));
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camera.setPerspective(60.0f, (float)width / (float)height, 0.1f, 256.0f);
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settings.overlay = true;
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}
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~VulkanExample()
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{
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if (uboDataDynamic.model) {
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alignedFree(uboDataDynamic.model);
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}
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// Clean up used Vulkan resources
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// Note : Inherited destructor cleans up resources stored in base class
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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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vertexBuffer.destroy();
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indexBuffer.destroy();
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uniformBuffers.view.destroy();
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uniformBuffers.dynamic.destroy();
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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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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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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, pipeline);
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VkDeviceSize offsets[1] = { 0 };
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vkCmdBindVertexBuffers(drawCmdBuffers[i], VERTEX_BUFFER_BIND_ID, 1, &vertexBuffer.buffer, offsets);
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vkCmdBindIndexBuffer(drawCmdBuffers[i], indexBuffer.buffer, 0, VK_INDEX_TYPE_UINT32);
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// Render multiple objects using different model matrices by dynamically offsetting into one uniform buffer
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for (uint32_t j = 0; j < OBJECT_INSTANCES; j++)
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{
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// One dynamic offset per dynamic descriptor to offset into the ubo containing all model matrices
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uint32_t dynamicOffset = j * static_cast<uint32_t>(dynamicAlignment);
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// Bind the descriptor set for rendering a mesh using the dynamic offset
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vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 1, &descriptorSet, 1, &dynamicOffset);
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vkCmdDrawIndexed(drawCmdBuffers[i], 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 draw()
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{
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VulkanExampleBase::prepareFrame();
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// Command buffer to be sumitted to the queue
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submitInfo.commandBufferCount = 1;
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submitInfo.pCommandBuffers = &drawCmdBuffers[currentBuffer];
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// Submit to queue
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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 generateCube()
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{
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// Setup vertices indices for a colored cube
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std::vector<Vertex> vertices = {
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{ { -1.0f, -1.0f, 1.0f },{ 1.0f, 0.0f, 0.0f } },
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{ { 1.0f, -1.0f, 1.0f },{ 0.0f, 1.0f, 0.0f } },
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{ { 1.0f, 1.0f, 1.0f },{ 0.0f, 0.0f, 1.0f } },
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{ { -1.0f, 1.0f, 1.0f },{ 0.0f, 0.0f, 0.0f } },
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{ { -1.0f, -1.0f, -1.0f },{ 1.0f, 0.0f, 0.0f } },
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{ { 1.0f, -1.0f, -1.0f },{ 0.0f, 1.0f, 0.0f } },
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{ { 1.0f, 1.0f, -1.0f },{ 0.0f, 0.0f, 1.0f } },
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{ { -1.0f, 1.0f, -1.0f },{ 0.0f, 0.0f, 0.0f } },
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};
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std::vector<uint32_t> indices = {
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0,1,2, 2,3,0, 1,5,6, 6,2,1, 7,6,5, 5,4,7, 4,0,3, 3,7,4, 4,5,1, 1,0,4, 3,2,6, 6,7,3,
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};
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indexCount = static_cast<uint32_t>(indices.size());
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// Create buffers
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// For the sake of simplicity we won't stage the vertex data to the gpu memory
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// Vertex buffer
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VK_CHECK_RESULT(vulkanDevice->createBuffer(
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VK_BUFFER_USAGE_VERTEX_BUFFER_BIT,
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VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
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&vertexBuffer,
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vertices.size() * sizeof(Vertex),
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vertices.data()));
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// Index buffer
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VK_CHECK_RESULT(vulkanDevice->createBuffer(
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VK_BUFFER_USAGE_INDEX_BUFFER_BIT,
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VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
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&indexBuffer,
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indices.size() * sizeof(uint32_t),
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indices.data()));
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}
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void setupVertexDescriptions()
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{
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// Binding description
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vertices.bindingDescriptions = {
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vks::initializers::vertexInputBindingDescription(VERTEX_BUFFER_BIND_ID, sizeof(Vertex), VK_VERTEX_INPUT_RATE_VERTEX),
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};
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// Attribute descriptions
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vertices.attributeDescriptions = {
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vks::initializers::vertexInputAttributeDescription(VERTEX_BUFFER_BIND_ID, 0, VK_FORMAT_R32G32B32_SFLOAT, offsetof(Vertex, pos)), // Location 0 : Position
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vks::initializers::vertexInputAttributeDescription(VERTEX_BUFFER_BIND_ID, 1, VK_FORMAT_R32G32B32_SFLOAT, offsetof(Vertex, color)), // Location 1 : Color
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};
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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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// Example uses one ubo and one image sampler
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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_UNIFORM_BUFFER_DYNAMIC, 1),
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vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1)
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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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{
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vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, VK_SHADER_STAGE_VERTEX_BIT, 0),
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vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC, VK_SHADER_STAGE_VERTEX_BIT, 1),
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vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_SHADER_STAGE_FRAGMENT_BIT, 2)
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};
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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, &descriptorSetLayout));
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VkPipelineLayoutCreateInfo pPipelineLayoutCreateInfo =
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vks::initializers::pipelineLayoutCreateInfo(
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&descriptorSetLayout,
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1);
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VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pPipelineLayoutCreateInfo, nullptr, &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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&descriptorSetLayout,
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1);
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VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSet));
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std::vector<VkWriteDescriptorSet> writeDescriptorSets = {
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// Binding 0 : Projection/View matrix uniform buffer
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vks::initializers::writeDescriptorSet(descriptorSet, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 0, &uniformBuffers.view.descriptor),
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// Binding 1 : Instance matrix as dynamic uniform buffer
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vks::initializers::writeDescriptorSet(descriptorSet, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC, 1, &uniformBuffers.dynamic.descriptor),
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};
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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_TRIANGLE_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_TRUE,
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VK_TRUE,
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VK_COMPARE_OP_LESS_OR_EQUAL);
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VkPipelineViewportStateCreateInfo viewportState =
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vks::initializers::pipelineViewportStateCreateInfo(1, 1, 0);
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VkPipelineMultisampleStateCreateInfo multisampleState =
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vks::initializers::pipelineMultisampleStateCreateInfo(
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VK_SAMPLE_COUNT_1_BIT,
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0);
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std::vector<VkDynamicState> dynamicStateEnables = {
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VK_DYNAMIC_STATE_VIEWPORT,
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VK_DYNAMIC_STATE_SCISSOR
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};
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VkPipelineDynamicStateCreateInfo dynamicState =
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vks::initializers::pipelineDynamicStateCreateInfo(
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dynamicStateEnables.data(),
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static_cast<uint32_t>(dynamicStateEnables.size()),
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0);
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// Load shaders
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std::array<VkPipelineShaderStageCreateInfo, 2> shaderStages;
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shaderStages[0] = loadShader(getAssetPath() + "shaders/dynamicuniformbuffer/base.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
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shaderStages[1] = loadShader(getAssetPath() + "shaders/dynamicuniformbuffer/base.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
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VkGraphicsPipelineCreateInfo pipelineCreateInfo =
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vks::initializers::pipelineCreateInfo(
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pipelineLayout,
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renderPass,
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0);
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pipelineCreateInfo.pVertexInputState = &vertices.inputState;
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pipelineCreateInfo.pInputAssemblyState = &inputAssemblyState;
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pipelineCreateInfo.pRasterizationState = &rasterizationState;
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pipelineCreateInfo.pColorBlendState = &colorBlendState;
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pipelineCreateInfo.pMultisampleState = &multisampleState;
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pipelineCreateInfo.pViewportState = &viewportState;
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pipelineCreateInfo.pDepthStencilState = &depthStencilState;
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pipelineCreateInfo.pDynamicState = &dynamicState;
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pipelineCreateInfo.stageCount = static_cast<uint32_t>(shaderStages.size());
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pipelineCreateInfo.pStages = shaderStages.data();
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VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipeline));
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}
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// Prepare and initialize uniform buffer containing shader uniforms
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void prepareUniformBuffers()
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{
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// Allocate data for the dynamic uniform buffer object
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// We allocate this manually as the alignment of the offset differs between GPUs
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// Calculate required alignment based on minimum device offset alignment
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size_t minUboAlignment = vulkanDevice->properties.limits.minUniformBufferOffsetAlignment;
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dynamicAlignment = sizeof(glm::mat4);
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if (minUboAlignment > 0) {
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dynamicAlignment = (dynamicAlignment + minUboAlignment - 1) & ~(minUboAlignment - 1);
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}
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size_t bufferSize = OBJECT_INSTANCES * dynamicAlignment;
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uboDataDynamic.model = (glm::mat4*)alignedAlloc(bufferSize, dynamicAlignment);
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assert(uboDataDynamic.model);
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std::cout << "minUniformBufferOffsetAlignment = " << minUboAlignment << std::endl;
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std::cout << "dynamicAlignment = " << dynamicAlignment << std::endl;
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// Vertex shader uniform buffer block
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// Static shared uniform buffer object with projection and view matrix
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VK_CHECK_RESULT(vulkanDevice->createBuffer(
|
||||
VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
|
||||
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
|
||||
&uniformBuffers.view,
|
||||
sizeof(uboVS)));
|
||||
|
||||
// Uniform buffer object with per-object matrices
|
||||
VK_CHECK_RESULT(vulkanDevice->createBuffer(
|
||||
VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
|
||||
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT,
|
||||
&uniformBuffers.dynamic,
|
||||
bufferSize));
|
||||
|
||||
// Map persistent
|
||||
VK_CHECK_RESULT(uniformBuffers.view.map());
|
||||
VK_CHECK_RESULT(uniformBuffers.dynamic.map());
|
||||
|
||||
// Prepare per-object matrices with offsets and random rotations
|
||||
std::mt19937 rndGen(static_cast<uint32_t>(time(0)));
|
||||
std::normal_distribution<float> rndDist(-1.0f, 1.0f);
|
||||
for (uint32_t i = 0; i < OBJECT_INSTANCES; i++)
|
||||
{
|
||||
rotations[i] = glm::vec3(rndDist(rndGen), rndDist(rndGen), rndDist(rndGen)) * 2.0f * (float)M_PI;
|
||||
rotationSpeeds[i] = glm::vec3(rndDist(rndGen), rndDist(rndGen), rndDist(rndGen));
|
||||
}
|
||||
|
||||
updateUniformBuffers();
|
||||
updateDynamicUniformBuffer(true);
|
||||
}
|
||||
|
||||
void updateUniformBuffers()
|
||||
{
|
||||
// Fixed ubo with projection and view matrices
|
||||
uboVS.projection = camera.matrices.perspective;
|
||||
uboVS.view = camera.matrices.view;
|
||||
|
||||
memcpy(uniformBuffers.view.mapped, &uboVS, sizeof(uboVS));
|
||||
}
|
||||
|
||||
void updateDynamicUniformBuffer(bool force = false)
|
||||
{
|
||||
// Update at max. 60 fps
|
||||
animationTimer += frameTimer;
|
||||
if ((animationTimer <= 1.0f / 60.0f) && (!force)) {
|
||||
return;
|
||||
}
|
||||
|
||||
// Dynamic ubo with per-object model matrices indexed by offsets in the command buffer
|
||||
uint32_t dim = static_cast<uint32_t>(pow(OBJECT_INSTANCES, (1.0f / 3.0f)));
|
||||
glm::vec3 offset(5.0f);
|
||||
|
||||
for (uint32_t x = 0; x < dim; x++)
|
||||
{
|
||||
for (uint32_t y = 0; y < dim; y++)
|
||||
{
|
||||
for (uint32_t z = 0; z < dim; z++)
|
||||
{
|
||||
uint32_t index = x * dim * dim + y * dim + z;
|
||||
|
||||
// Aligned offset
|
||||
glm::mat4* modelMat = (glm::mat4*)(((uint64_t)uboDataDynamic.model + (index * dynamicAlignment)));
|
||||
|
||||
// Update rotations
|
||||
rotations[index] += animationTimer * rotationSpeeds[index];
|
||||
|
||||
// Update matrices
|
||||
glm::vec3 pos = glm::vec3(-((dim * offset.x) / 2.0f) + offset.x / 2.0f + x * offset.x, -((dim * offset.y) / 2.0f) + offset.y / 2.0f + y * offset.y, -((dim * offset.z) / 2.0f) + offset.z / 2.0f + z * offset.z);
|
||||
*modelMat = glm::translate(glm::mat4(1.0f), pos);
|
||||
*modelMat = glm::rotate(*modelMat, rotations[index].x, glm::vec3(1.0f, 1.0f, 0.0f));
|
||||
*modelMat = glm::rotate(*modelMat, rotations[index].y, glm::vec3(0.0f, 1.0f, 0.0f));
|
||||
*modelMat = glm::rotate(*modelMat, rotations[index].z, glm::vec3(0.0f, 0.0f, 1.0f));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
animationTimer = 0.0f;
|
||||
|
||||
memcpy(uniformBuffers.dynamic.mapped, uboDataDynamic.model, uniformBuffers.dynamic.size);
|
||||
// Flush to make changes visible to the host
|
||||
VkMappedMemoryRange memoryRange = vks::initializers::mappedMemoryRange();
|
||||
memoryRange.memory = uniformBuffers.dynamic.memory;
|
||||
memoryRange.size = uniformBuffers.dynamic.size;
|
||||
vkFlushMappedMemoryRanges(device, 1, &memoryRange);
|
||||
}
|
||||
|
||||
void prepare()
|
||||
{
|
||||
VulkanExampleBase::prepare();
|
||||
generateCube();
|
||||
setupVertexDescriptions();
|
||||
prepareUniformBuffers();
|
||||
setupDescriptorSetLayout();
|
||||
preparePipelines();
|
||||
setupDescriptorPool();
|
||||
setupDescriptorSet();
|
||||
buildCommandBuffers();
|
||||
prepared = true;
|
||||
}
|
||||
|
||||
virtual void render()
|
||||
{
|
||||
if (!prepared)
|
||||
return;
|
||||
draw();
|
||||
if (!paused)
|
||||
updateDynamicUniformBuffer();
|
||||
}
|
||||
|
||||
virtual void viewChanged()
|
||||
{
|
||||
updateUniformBuffers();
|
||||
}
|
||||
};
|
||||
|
||||
VULKAN_EXAMPLE_MAIN()
|
||||
Loading…
Add table
Add a link
Reference in a new issue