1446 lines
No EOL
65 KiB
C++
1446 lines
No EOL
65 KiB
C++
/*
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* Vulkan Example - Physical based rendering with image based lighting
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*
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* Note: Requires the separate asset pack (see data/README.md)
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*
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* Copyright (C) 2016-2017 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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// For reference see http://blog.selfshadow.com/publications/s2013-shading-course/karis/s2013_pbs_epic_notes_v2.pdf
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#include "vulkanexamplebase.h"
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#include "VulkanglTFModel.h"
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#define ENABLE_VALIDATION false
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#define GRID_DIM 7
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struct Material {
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// Parameter block used as push constant block
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struct PushBlock {
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float roughness = 0.0f;
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float metallic = 0.0f;
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float specular = 0.0f;
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float r, g, b;
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} params;
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std::string name;
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Material() {};
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Material(std::string n, glm::vec3 c) : name(n) {
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params.r = c.r;
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params.g = c.g;
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params.b = c.b;
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};
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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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bool displaySkybox = true;
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struct Textures {
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vks::TextureCubeMap environmentCube;
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// Generated at runtime
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vks::Texture2D lutBrdf;
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vks::TextureCubeMap irradianceCube;
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vks::TextureCubeMap prefilteredCube;
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} textures;
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struct Meshes {
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vkglTF::Model skybox;
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std::vector<vkglTF::Model> objects;
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int32_t objectIndex = 0;
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} models;
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struct {
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vks::Buffer object;
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vks::Buffer skybox;
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vks::Buffer params;
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} uniformBuffers;
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struct UBOMatrices {
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glm::mat4 projection;
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glm::mat4 model;
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glm::mat4 view;
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glm::vec3 camPos;
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} uboMatrices;
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struct UBOParams {
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glm::vec4 lights[4];
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float exposure = 4.5f;
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float gamma = 2.2f;
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} uboParams;
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struct {
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VkPipeline skybox;
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VkPipeline pbr;
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} pipelines;
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struct {
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VkDescriptorSet object;
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VkDescriptorSet skybox;
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} descriptorSets;
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VkPipelineLayout pipelineLayout;
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VkDescriptorSetLayout descriptorSetLayout;
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// Default materials to select from
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std::vector<Material> materials;
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int32_t materialIndex = 0;
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std::vector<std::string> materialNames;
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std::vector<std::string> objectNames;
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VulkanExample() : VulkanExampleBase(ENABLE_VALIDATION)
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{
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title = "PBR with image based lighting";
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camera.type = Camera::CameraType::firstperson;
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camera.movementSpeed = 4.0f;
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camera.setPerspective(60.0f, (float)width / (float)height, 0.1f, 256.0f);
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camera.rotationSpeed = 0.25f;
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camera.setRotation({ -3.75f, 180.0f, 0.0f });
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camera.setPosition({ 0.55f, 0.85f, 12.0f });
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// Setup some default materials (source: https://seblagarde.wordpress.com/2011/08/17/feeding-a-physical-based-lighting-mode/)
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materials.push_back(Material("Gold", glm::vec3(1.0f, 0.765557f, 0.336057f)));
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materials.push_back(Material("Copper", glm::vec3(0.955008f, 0.637427f, 0.538163f)));
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materials.push_back(Material("Chromium", glm::vec3(0.549585f, 0.556114f, 0.554256f)));
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materials.push_back(Material("Nickel", glm::vec3(0.659777f, 0.608679f, 0.525649f)));
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materials.push_back(Material("Titanium", glm::vec3(0.541931f, 0.496791f, 0.449419f)));
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materials.push_back(Material("Cobalt", glm::vec3(0.662124f, 0.654864f, 0.633732f)));
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materials.push_back(Material("Platinum", glm::vec3(0.672411f, 0.637331f, 0.585456f)));
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// Testing materials
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materials.push_back(Material("White", glm::vec3(1.0f)));
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materials.push_back(Material("Dark", glm::vec3(0.1f)));
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materials.push_back(Material("Black", glm::vec3(0.0f)));
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materials.push_back(Material("Red", glm::vec3(1.0f, 0.0f, 0.0f)));
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materials.push_back(Material("Blue", glm::vec3(0.0f, 0.0f, 1.0f)));
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settings.overlay = true;
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for (auto material : materials) {
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materialNames.push_back(material.name);
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}
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objectNames = { "Sphere", "Teapot", "Torusknot", "Venus" };
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materialIndex = 9;
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}
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~VulkanExample()
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{
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vkDestroyPipeline(device, pipelines.skybox, nullptr);
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vkDestroyPipeline(device, pipelines.pbr, nullptr);
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vkDestroyPipelineLayout(device, pipelineLayout, nullptr);
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vkDestroyDescriptorSetLayout(device, descriptorSetLayout, nullptr);
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uniformBuffers.object.destroy();
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uniformBuffers.skybox.destroy();
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uniformBuffers.params.destroy();
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textures.environmentCube.destroy();
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textures.irradianceCube.destroy();
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textures.prefilteredCube.destroy();
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textures.lutBrdf.destroy();
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}
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virtual void getEnabledFeatures()
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{
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if (deviceFeatures.samplerAnisotropy) {
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enabledFeatures.samplerAnisotropy = VK_TRUE;
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}
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}
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void buildCommandBuffers()
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{
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VkCommandBufferBeginInfo cmdBufInfo = vks::initializers::commandBufferBeginInfo();
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VkClearValue clearValues[2];
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clearValues[0].color = { { 0.1f, 0.1f, 0.1f, 1.0f } };
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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 (size_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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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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// Skybox
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if (displaySkybox)
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{
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vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 1, &descriptorSets.skybox, 0, NULL);
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vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.skybox);
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models.skybox.draw(drawCmdBuffers[i]);
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}
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// Objects
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vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayout, 0, 1, &descriptorSets.object, 0, NULL);
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vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.pbr);
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Material mat = materials[materialIndex];
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#define SINGLE_ROW 1
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#ifdef SINGLE_ROW
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uint32_t objcount = 10;
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for (uint32_t x = 0; x < objcount; x++) {
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glm::vec3 pos = glm::vec3(float(x - (objcount / 2.0f)) * 2.15f, 0.0f, 0.0f);
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mat.params.roughness = 1.0f-glm::clamp((float)x / (float)objcount, 0.005f, 1.0f);
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mat.params.metallic = glm::clamp((float)x / (float)objcount, 0.005f, 1.0f);
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vkCmdPushConstants(drawCmdBuffers[i], pipelineLayout, VK_SHADER_STAGE_VERTEX_BIT, 0, sizeof(glm::vec3), &pos);
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vkCmdPushConstants(drawCmdBuffers[i], pipelineLayout, VK_SHADER_STAGE_FRAGMENT_BIT, sizeof(glm::vec3), sizeof(Material::PushBlock), &mat);
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models.objects[models.objectIndex].draw(drawCmdBuffers[i]);
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}
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#else
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for (uint32_t y = 0; y < GRID_DIM; y++) {
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mat.params.metallic = (float)y / (float)(GRID_DIM);
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for (uint32_t x = 0; x < GRID_DIM; x++) {
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glm::vec3 pos = glm::vec3(float(x - (GRID_DIM / 2.0f)) * 2.5f, 0.0f, float(y - (GRID_DIM / 2.0f)) * 2.5f);
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vkCmdPushConstants(drawCmdBuffers[i], pipelineLayout, VK_SHADER_STAGE_VERTEX_BIT, 0, sizeof(glm::vec3), &pos);
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mat.params.roughness = glm::clamp((float)x / (float)(GRID_DIM), 0.05f, 1.0f);
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vkCmdPushConstants(drawCmdBuffers[i], pipelineLayout, VK_SHADER_STAGE_FRAGMENT_BIT, sizeof(glm::vec3), sizeof(Material::PushBlock), &mat);
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models.objects[models.objectIndex].draw(drawCmdBuffers[i]);
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}
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}
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#endif
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drawUI(drawCmdBuffers[i]);
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vkCmdEndRenderPass(drawCmdBuffers[i]);
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VK_CHECK_RESULT(vkEndCommandBuffer(drawCmdBuffers[i]));
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}
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}
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void loadAssets()
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{
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uint32_t glTFLoadingFlags = vkglTF::FileLoadingFlags::PreTransformVertices | vkglTF::FileLoadingFlags::FlipY;
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// Skybox
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models.skybox.loadFromFile(getAssetPath() + "models/cube.gltf", vulkanDevice, queue, glTFLoadingFlags);
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// Objects
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std::vector<std::string> filenames = { "sphere.gltf", "teapot.gltf", "torusknot.gltf", "venus.gltf" };
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models.objects.resize(filenames.size());
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for (size_t i = 0; i < filenames.size(); i++) {
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models.objects[i].loadFromFile(getAssetPath() + "models/" + filenames[i], vulkanDevice, queue, glTFLoadingFlags);
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}
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// HDR cubemap
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textures.environmentCube.loadFromFile(getAssetPath() + "textures/hdr/pisa_cube.ktx", VK_FORMAT_R16G16B16A16_SFLOAT, vulkanDevice, queue);
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}
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void setupDescriptors()
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{
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// Descriptor Pool
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std::vector<VkDescriptorPoolSize> poolSizes = {
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vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 4),
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vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 6)
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};
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VkDescriptorPoolCreateInfo descriptorPoolInfo = vks::initializers::descriptorPoolCreateInfo(poolSizes, 2);
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VK_CHECK_RESULT(vkCreateDescriptorPool(device, &descriptorPoolInfo, nullptr, &descriptorPool));
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// Descriptor set layout
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std::vector<VkDescriptorSetLayoutBinding> setLayoutBindings = {
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vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT, 0),
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vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, VK_SHADER_STAGE_FRAGMENT_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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vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_SHADER_STAGE_FRAGMENT_BIT, 3),
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vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_SHADER_STAGE_FRAGMENT_BIT, 4),
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};
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VkDescriptorSetLayoutCreateInfo descriptorLayout = vks::initializers::descriptorSetLayoutCreateInfo(setLayoutBindings);
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VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorLayout, nullptr, &descriptorSetLayout));
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// Descriptor sets
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VkDescriptorSetAllocateInfo allocInfo = vks::initializers::descriptorSetAllocateInfo(descriptorPool, &descriptorSetLayout, 1);
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// Objects
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VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSets.object));
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std::vector<VkWriteDescriptorSet> writeDescriptorSets = {
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vks::initializers::writeDescriptorSet(descriptorSets.object, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 0, &uniformBuffers.object.descriptor),
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vks::initializers::writeDescriptorSet(descriptorSets.object, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1, &uniformBuffers.params.descriptor),
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vks::initializers::writeDescriptorSet(descriptorSets.object, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 2, &textures.irradianceCube.descriptor),
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vks::initializers::writeDescriptorSet(descriptorSets.object, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 3, &textures.lutBrdf.descriptor),
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vks::initializers::writeDescriptorSet(descriptorSets.object, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 4, &textures.prefilteredCube.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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// Sky box
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VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSets.skybox));
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writeDescriptorSets = {
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vks::initializers::writeDescriptorSet(descriptorSets.skybox, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 0, &uniformBuffers.skybox.descriptor),
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vks::initializers::writeDescriptorSet(descriptorSets.skybox, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1, &uniformBuffers.params.descriptor),
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vks::initializers::writeDescriptorSet(descriptorSets.skybox, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 2, &textures.environmentCube.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(VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST, 0, VK_FALSE);
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VkPipelineRasterizationStateCreateInfo rasterizationState =
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vks::initializers::pipelineRasterizationStateCreateInfo(VK_POLYGON_MODE_FILL, VK_CULL_MODE_NONE, VK_FRONT_FACE_COUNTER_CLOCKWISE);
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VkPipelineColorBlendAttachmentState blendAttachmentState =
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vks::initializers::pipelineColorBlendAttachmentState(0xf, VK_FALSE);
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VkPipelineColorBlendStateCreateInfo colorBlendState =
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vks::initializers::pipelineColorBlendStateCreateInfo(1, &blendAttachmentState);
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VkPipelineDepthStencilStateCreateInfo depthStencilState =
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vks::initializers::pipelineDepthStencilStateCreateInfo(VK_FALSE, VK_FALSE, VK_COMPARE_OP_LESS_OR_EQUAL);
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VkPipelineViewportStateCreateInfo viewportState =
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vks::initializers::pipelineViewportStateCreateInfo(1, 1);
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VkPipelineMultisampleStateCreateInfo multisampleState =
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vks::initializers::pipelineMultisampleStateCreateInfo(VK_SAMPLE_COUNT_1_BIT);
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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(dynamicStateEnables);
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// Pipeline layout
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VkPipelineLayoutCreateInfo pipelineLayoutCreateInfo = vks::initializers::pipelineLayoutCreateInfo(&descriptorSetLayout, 1);
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// Push constant ranges
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std::vector<VkPushConstantRange> pushConstantRanges = {
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vks::initializers::pushConstantRange(VK_SHADER_STAGE_VERTEX_BIT, sizeof(glm::vec3), 0),
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vks::initializers::pushConstantRange(VK_SHADER_STAGE_FRAGMENT_BIT, sizeof(Material::PushBlock), sizeof(glm::vec3)),
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};
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pipelineLayoutCreateInfo.pushConstantRangeCount = 2;
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pipelineLayoutCreateInfo.pPushConstantRanges = pushConstantRanges.data();
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VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pipelineLayoutCreateInfo, nullptr, &pipelineLayout));
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std::array<VkPipelineShaderStageCreateInfo, 2> shaderStages;
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// Pipelines
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VkGraphicsPipelineCreateInfo pipelineCI = vks::initializers::pipelineCreateInfo(pipelineLayout, renderPass);
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pipelineCI.pInputAssemblyState = &inputAssemblyState;
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pipelineCI.pRasterizationState = &rasterizationState;
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pipelineCI.pColorBlendState = &colorBlendState;
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pipelineCI.pMultisampleState = &multisampleState;
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pipelineCI.pViewportState = &viewportState;
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pipelineCI.pDepthStencilState = &depthStencilState;
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pipelineCI.pDynamicState = &dynamicState;
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pipelineCI.stageCount = static_cast<uint32_t>(shaderStages.size());
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pipelineCI.pStages = shaderStages.data();
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pipelineCI.pVertexInputState = vkglTF::Vertex::getPipelineVertexInputState({ vkglTF::VertexComponent::Position, vkglTF::VertexComponent::Normal, vkglTF::VertexComponent::UV });
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// Skybox pipeline (background cube)
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shaderStages[0] = loadShader(getShadersPath() + "pbribl/skybox.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
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shaderStages[1] = loadShader(getShadersPath() + "pbribl/skybox.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
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VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCI, nullptr, &pipelines.skybox));
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// PBR pipeline
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shaderStages[0] = loadShader(getShadersPath() + "pbribl/pbribl.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
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shaderStages[1] = loadShader(getShadersPath() + "pbribl/pbribl.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
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// Enable depth test and write
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depthStencilState.depthWriteEnable = VK_TRUE;
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depthStencilState.depthTestEnable = VK_TRUE;
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VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCI, nullptr, &pipelines.pbr));
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}
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// Generate a BRDF integration map used as a look-up-table (stores roughness / NdotV)
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void generateBRDFLUT()
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{
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auto tStart = std::chrono::high_resolution_clock::now();
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const VkFormat format = VK_FORMAT_R16G16_SFLOAT; // R16G16 is supported pretty much everywhere
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const int32_t dim = 512;
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// Image
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VkImageCreateInfo imageCI = vks::initializers::imageCreateInfo();
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imageCI.imageType = VK_IMAGE_TYPE_2D;
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imageCI.format = format;
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imageCI.extent.width = dim;
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imageCI.extent.height = dim;
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imageCI.extent.depth = 1;
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imageCI.mipLevels = 1;
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imageCI.arrayLayers = 1;
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imageCI.samples = VK_SAMPLE_COUNT_1_BIT;
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imageCI.tiling = VK_IMAGE_TILING_OPTIMAL;
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imageCI.usage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT | VK_IMAGE_USAGE_SAMPLED_BIT;
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VK_CHECK_RESULT(vkCreateImage(device, &imageCI, nullptr, &textures.lutBrdf.image));
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VkMemoryAllocateInfo memAlloc = vks::initializers::memoryAllocateInfo();
|
|
VkMemoryRequirements memReqs;
|
|
vkGetImageMemoryRequirements(device, textures.lutBrdf.image, &memReqs);
|
|
memAlloc.allocationSize = memReqs.size;
|
|
memAlloc.memoryTypeIndex = vulkanDevice->getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
|
|
VK_CHECK_RESULT(vkAllocateMemory(device, &memAlloc, nullptr, &textures.lutBrdf.deviceMemory));
|
|
VK_CHECK_RESULT(vkBindImageMemory(device, textures.lutBrdf.image, textures.lutBrdf.deviceMemory, 0));
|
|
// Image view
|
|
VkImageViewCreateInfo viewCI = vks::initializers::imageViewCreateInfo();
|
|
viewCI.viewType = VK_IMAGE_VIEW_TYPE_2D;
|
|
viewCI.format = format;
|
|
viewCI.subresourceRange = {};
|
|
viewCI.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
|
|
viewCI.subresourceRange.levelCount = 1;
|
|
viewCI.subresourceRange.layerCount = 1;
|
|
viewCI.image = textures.lutBrdf.image;
|
|
VK_CHECK_RESULT(vkCreateImageView(device, &viewCI, nullptr, &textures.lutBrdf.view));
|
|
// Sampler
|
|
VkSamplerCreateInfo samplerCI = vks::initializers::samplerCreateInfo();
|
|
samplerCI.magFilter = VK_FILTER_LINEAR;
|
|
samplerCI.minFilter = VK_FILTER_LINEAR;
|
|
samplerCI.mipmapMode = VK_SAMPLER_MIPMAP_MODE_LINEAR;
|
|
samplerCI.addressModeU = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;
|
|
samplerCI.addressModeV = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;
|
|
samplerCI.addressModeW = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;
|
|
samplerCI.minLod = 0.0f;
|
|
samplerCI.maxLod = 1.0f;
|
|
samplerCI.borderColor = VK_BORDER_COLOR_FLOAT_OPAQUE_WHITE;
|
|
VK_CHECK_RESULT(vkCreateSampler(device, &samplerCI, nullptr, &textures.lutBrdf.sampler));
|
|
|
|
textures.lutBrdf.descriptor.imageView = textures.lutBrdf.view;
|
|
textures.lutBrdf.descriptor.sampler = textures.lutBrdf.sampler;
|
|
textures.lutBrdf.descriptor.imageLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
|
|
textures.lutBrdf.device = vulkanDevice;
|
|
|
|
// FB, Att, RP, Pipe, etc.
|
|
VkAttachmentDescription attDesc = {};
|
|
// Color attachment
|
|
attDesc.format = format;
|
|
attDesc.samples = VK_SAMPLE_COUNT_1_BIT;
|
|
attDesc.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
|
|
attDesc.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
|
|
attDesc.stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
|
|
attDesc.stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
|
|
attDesc.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
|
|
attDesc.finalLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
|
|
VkAttachmentReference colorReference = { 0, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL };
|
|
|
|
VkSubpassDescription subpassDescription = {};
|
|
subpassDescription.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
|
|
subpassDescription.colorAttachmentCount = 1;
|
|
subpassDescription.pColorAttachments = &colorReference;
|
|
|
|
// Use subpass dependencies for layout transitions
|
|
std::array<VkSubpassDependency, 2> dependencies;
|
|
dependencies[0].srcSubpass = VK_SUBPASS_EXTERNAL;
|
|
dependencies[0].dstSubpass = 0;
|
|
dependencies[0].srcStageMask = VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT;
|
|
dependencies[0].dstStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
|
|
dependencies[0].srcAccessMask = VK_ACCESS_MEMORY_READ_BIT;
|
|
dependencies[0].dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_READ_BIT | VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
|
|
dependencies[0].dependencyFlags = VK_DEPENDENCY_BY_REGION_BIT;
|
|
dependencies[1].srcSubpass = 0;
|
|
dependencies[1].dstSubpass = VK_SUBPASS_EXTERNAL;
|
|
dependencies[1].srcStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
|
|
dependencies[1].dstStageMask = VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT;
|
|
dependencies[1].srcAccessMask = VK_ACCESS_COLOR_ATTACHMENT_READ_BIT | VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
|
|
dependencies[1].dstAccessMask = VK_ACCESS_MEMORY_READ_BIT;
|
|
dependencies[1].dependencyFlags = VK_DEPENDENCY_BY_REGION_BIT;
|
|
|
|
// Create the actual renderpass
|
|
VkRenderPassCreateInfo renderPassCI = vks::initializers::renderPassCreateInfo();
|
|
renderPassCI.attachmentCount = 1;
|
|
renderPassCI.pAttachments = &attDesc;
|
|
renderPassCI.subpassCount = 1;
|
|
renderPassCI.pSubpasses = &subpassDescription;
|
|
renderPassCI.dependencyCount = 2;
|
|
renderPassCI.pDependencies = dependencies.data();
|
|
|
|
VkRenderPass renderpass;
|
|
VK_CHECK_RESULT(vkCreateRenderPass(device, &renderPassCI, nullptr, &renderpass));
|
|
|
|
VkFramebufferCreateInfo framebufferCI = vks::initializers::framebufferCreateInfo();
|
|
framebufferCI.renderPass = renderpass;
|
|
framebufferCI.attachmentCount = 1;
|
|
framebufferCI.pAttachments = &textures.lutBrdf.view;
|
|
framebufferCI.width = dim;
|
|
framebufferCI.height = dim;
|
|
framebufferCI.layers = 1;
|
|
|
|
VkFramebuffer framebuffer;
|
|
VK_CHECK_RESULT(vkCreateFramebuffer(device, &framebufferCI, nullptr, &framebuffer));
|
|
|
|
// Desriptors
|
|
VkDescriptorSetLayout descriptorsetlayout;
|
|
std::vector<VkDescriptorSetLayoutBinding> setLayoutBindings = {};
|
|
VkDescriptorSetLayoutCreateInfo descriptorsetlayoutCI = vks::initializers::descriptorSetLayoutCreateInfo(setLayoutBindings);
|
|
VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorsetlayoutCI, nullptr, &descriptorsetlayout));
|
|
|
|
// Descriptor Pool
|
|
std::vector<VkDescriptorPoolSize> poolSizes = { vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1) };
|
|
VkDescriptorPoolCreateInfo descriptorPoolCI = vks::initializers::descriptorPoolCreateInfo(poolSizes, 2);
|
|
VkDescriptorPool descriptorpool;
|
|
VK_CHECK_RESULT(vkCreateDescriptorPool(device, &descriptorPoolCI, nullptr, &descriptorpool));
|
|
|
|
// Descriptor sets
|
|
VkDescriptorSet descriptorset;
|
|
VkDescriptorSetAllocateInfo allocInfo = vks::initializers::descriptorSetAllocateInfo(descriptorpool, &descriptorsetlayout, 1);
|
|
VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorset));
|
|
|
|
// Pipeline layout
|
|
VkPipelineLayout pipelinelayout;
|
|
VkPipelineLayoutCreateInfo pipelineLayoutCI = vks::initializers::pipelineLayoutCreateInfo(&descriptorsetlayout, 1);
|
|
VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pipelineLayoutCI, nullptr, &pipelinelayout));
|
|
|
|
// Pipeline
|
|
VkPipelineInputAssemblyStateCreateInfo inputAssemblyState = vks::initializers::pipelineInputAssemblyStateCreateInfo(VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST, 0, VK_FALSE);
|
|
VkPipelineRasterizationStateCreateInfo rasterizationState = vks::initializers::pipelineRasterizationStateCreateInfo(VK_POLYGON_MODE_FILL, VK_CULL_MODE_NONE, VK_FRONT_FACE_COUNTER_CLOCKWISE);
|
|
VkPipelineColorBlendAttachmentState blendAttachmentState = vks::initializers::pipelineColorBlendAttachmentState(0xf, VK_FALSE);
|
|
VkPipelineColorBlendStateCreateInfo colorBlendState = vks::initializers::pipelineColorBlendStateCreateInfo(1, &blendAttachmentState);
|
|
VkPipelineDepthStencilStateCreateInfo depthStencilState = vks::initializers::pipelineDepthStencilStateCreateInfo(VK_FALSE, VK_FALSE, VK_COMPARE_OP_LESS_OR_EQUAL);
|
|
VkPipelineViewportStateCreateInfo viewportState = vks::initializers::pipelineViewportStateCreateInfo(1, 1);
|
|
VkPipelineMultisampleStateCreateInfo multisampleState = vks::initializers::pipelineMultisampleStateCreateInfo(VK_SAMPLE_COUNT_1_BIT);
|
|
std::vector<VkDynamicState> dynamicStateEnables = { VK_DYNAMIC_STATE_VIEWPORT, VK_DYNAMIC_STATE_SCISSOR };
|
|
VkPipelineDynamicStateCreateInfo dynamicState = vks::initializers::pipelineDynamicStateCreateInfo(dynamicStateEnables);
|
|
VkPipelineVertexInputStateCreateInfo emptyInputState = vks::initializers::pipelineVertexInputStateCreateInfo();
|
|
std::array<VkPipelineShaderStageCreateInfo, 2> shaderStages;
|
|
|
|
VkGraphicsPipelineCreateInfo pipelineCI = vks::initializers::pipelineCreateInfo(pipelinelayout, renderpass);
|
|
pipelineCI.pInputAssemblyState = &inputAssemblyState;
|
|
pipelineCI.pRasterizationState = &rasterizationState;
|
|
pipelineCI.pColorBlendState = &colorBlendState;
|
|
pipelineCI.pMultisampleState = &multisampleState;
|
|
pipelineCI.pViewportState = &viewportState;
|
|
pipelineCI.pDepthStencilState = &depthStencilState;
|
|
pipelineCI.pDynamicState = &dynamicState;
|
|
pipelineCI.stageCount = 2;
|
|
pipelineCI.pStages = shaderStages.data();
|
|
pipelineCI.pVertexInputState = &emptyInputState;
|
|
|
|
// Look-up-table (from BRDF) pipeline
|
|
shaderStages[0] = loadShader(getShadersPath() + "pbribl/genbrdflut.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
|
|
shaderStages[1] = loadShader(getShadersPath() + "pbribl/genbrdflut.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
|
|
VkPipeline pipeline;
|
|
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCI, nullptr, &pipeline));
|
|
|
|
// Render
|
|
VkClearValue clearValues[1];
|
|
clearValues[0].color = { { 0.0f, 0.0f, 0.0f, 1.0f } };
|
|
|
|
VkRenderPassBeginInfo renderPassBeginInfo = vks::initializers::renderPassBeginInfo();
|
|
renderPassBeginInfo.renderPass = renderpass;
|
|
renderPassBeginInfo.renderArea.extent.width = dim;
|
|
renderPassBeginInfo.renderArea.extent.height = dim;
|
|
renderPassBeginInfo.clearValueCount = 1;
|
|
renderPassBeginInfo.pClearValues = clearValues;
|
|
renderPassBeginInfo.framebuffer = framebuffer;
|
|
|
|
VkCommandBuffer cmdBuf = vulkanDevice->createCommandBuffer(VK_COMMAND_BUFFER_LEVEL_PRIMARY, true);
|
|
vkCmdBeginRenderPass(cmdBuf, &renderPassBeginInfo, VK_SUBPASS_CONTENTS_INLINE);
|
|
VkViewport viewport = vks::initializers::viewport((float)dim, (float)dim, 0.0f, 1.0f);
|
|
VkRect2D scissor = vks::initializers::rect2D(dim, dim, 0, 0);
|
|
vkCmdSetViewport(cmdBuf, 0, 1, &viewport);
|
|
vkCmdSetScissor(cmdBuf, 0, 1, &scissor);
|
|
vkCmdBindPipeline(cmdBuf, VK_PIPELINE_BIND_POINT_GRAPHICS, pipeline);
|
|
vkCmdDraw(cmdBuf, 3, 1, 0, 0);
|
|
vkCmdEndRenderPass(cmdBuf);
|
|
vulkanDevice->flushCommandBuffer(cmdBuf, queue);
|
|
|
|
vkQueueWaitIdle(queue);
|
|
|
|
// todo: cleanup
|
|
vkDestroyPipeline(device, pipeline, nullptr);
|
|
vkDestroyPipelineLayout(device, pipelinelayout, nullptr);
|
|
vkDestroyRenderPass(device, renderpass, nullptr);
|
|
vkDestroyFramebuffer(device, framebuffer, nullptr);
|
|
vkDestroyDescriptorSetLayout(device, descriptorsetlayout, nullptr);
|
|
vkDestroyDescriptorPool(device, descriptorpool, nullptr);
|
|
|
|
auto tEnd = std::chrono::high_resolution_clock::now();
|
|
auto tDiff = std::chrono::duration<double, std::milli>(tEnd - tStart).count();
|
|
std::cout << "Generating BRDF LUT took " << tDiff << " ms" << std::endl;
|
|
}
|
|
|
|
// Generate an irradiance cube map from the environment cube map
|
|
void generateIrradianceCube()
|
|
{
|
|
auto tStart = std::chrono::high_resolution_clock::now();
|
|
|
|
const VkFormat format = VK_FORMAT_R32G32B32A32_SFLOAT;
|
|
const int32_t dim = 64;
|
|
const uint32_t numMips = static_cast<uint32_t>(floor(log2(dim))) + 1;
|
|
|
|
// Pre-filtered cube map
|
|
// Image
|
|
VkImageCreateInfo imageCI = vks::initializers::imageCreateInfo();
|
|
imageCI.imageType = VK_IMAGE_TYPE_2D;
|
|
imageCI.format = format;
|
|
imageCI.extent.width = dim;
|
|
imageCI.extent.height = dim;
|
|
imageCI.extent.depth = 1;
|
|
imageCI.mipLevels = numMips;
|
|
imageCI.arrayLayers = 6;
|
|
imageCI.samples = VK_SAMPLE_COUNT_1_BIT;
|
|
imageCI.tiling = VK_IMAGE_TILING_OPTIMAL;
|
|
imageCI.usage = VK_IMAGE_USAGE_SAMPLED_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT;
|
|
imageCI.flags = VK_IMAGE_CREATE_CUBE_COMPATIBLE_BIT;
|
|
VK_CHECK_RESULT(vkCreateImage(device, &imageCI, nullptr, &textures.irradianceCube.image));
|
|
VkMemoryAllocateInfo memAlloc = vks::initializers::memoryAllocateInfo();
|
|
VkMemoryRequirements memReqs;
|
|
vkGetImageMemoryRequirements(device, textures.irradianceCube.image, &memReqs);
|
|
memAlloc.allocationSize = memReqs.size;
|
|
memAlloc.memoryTypeIndex = vulkanDevice->getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
|
|
VK_CHECK_RESULT(vkAllocateMemory(device, &memAlloc, nullptr, &textures.irradianceCube.deviceMemory));
|
|
VK_CHECK_RESULT(vkBindImageMemory(device, textures.irradianceCube.image, textures.irradianceCube.deviceMemory, 0));
|
|
// Image view
|
|
VkImageViewCreateInfo viewCI = vks::initializers::imageViewCreateInfo();
|
|
viewCI.viewType = VK_IMAGE_VIEW_TYPE_CUBE;
|
|
viewCI.format = format;
|
|
viewCI.subresourceRange = {};
|
|
viewCI.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
|
|
viewCI.subresourceRange.levelCount = numMips;
|
|
viewCI.subresourceRange.layerCount = 6;
|
|
viewCI.image = textures.irradianceCube.image;
|
|
VK_CHECK_RESULT(vkCreateImageView(device, &viewCI, nullptr, &textures.irradianceCube.view));
|
|
// Sampler
|
|
VkSamplerCreateInfo samplerCI = vks::initializers::samplerCreateInfo();
|
|
samplerCI.magFilter = VK_FILTER_LINEAR;
|
|
samplerCI.minFilter = VK_FILTER_LINEAR;
|
|
samplerCI.mipmapMode = VK_SAMPLER_MIPMAP_MODE_LINEAR;
|
|
samplerCI.addressModeU = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;
|
|
samplerCI.addressModeV = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;
|
|
samplerCI.addressModeW = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;
|
|
samplerCI.minLod = 0.0f;
|
|
samplerCI.maxLod = static_cast<float>(numMips);
|
|
samplerCI.borderColor = VK_BORDER_COLOR_FLOAT_OPAQUE_WHITE;
|
|
VK_CHECK_RESULT(vkCreateSampler(device, &samplerCI, nullptr, &textures.irradianceCube.sampler));
|
|
|
|
textures.irradianceCube.descriptor.imageView = textures.irradianceCube.view;
|
|
textures.irradianceCube.descriptor.sampler = textures.irradianceCube.sampler;
|
|
textures.irradianceCube.descriptor.imageLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
|
|
textures.irradianceCube.device = vulkanDevice;
|
|
|
|
// FB, Att, RP, Pipe, etc.
|
|
VkAttachmentDescription attDesc = {};
|
|
// Color attachment
|
|
attDesc.format = format;
|
|
attDesc.samples = VK_SAMPLE_COUNT_1_BIT;
|
|
attDesc.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
|
|
attDesc.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
|
|
attDesc.stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
|
|
attDesc.stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
|
|
attDesc.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
|
|
attDesc.finalLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
|
|
VkAttachmentReference colorReference = { 0, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL };
|
|
|
|
VkSubpassDescription subpassDescription = {};
|
|
subpassDescription.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
|
|
subpassDescription.colorAttachmentCount = 1;
|
|
subpassDescription.pColorAttachments = &colorReference;
|
|
|
|
// Use subpass dependencies for layout transitions
|
|
std::array<VkSubpassDependency, 2> dependencies;
|
|
dependencies[0].srcSubpass = VK_SUBPASS_EXTERNAL;
|
|
dependencies[0].dstSubpass = 0;
|
|
dependencies[0].srcStageMask = VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT;
|
|
dependencies[0].dstStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
|
|
dependencies[0].srcAccessMask = VK_ACCESS_MEMORY_READ_BIT;
|
|
dependencies[0].dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_READ_BIT | VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
|
|
dependencies[0].dependencyFlags = VK_DEPENDENCY_BY_REGION_BIT;
|
|
dependencies[1].srcSubpass = 0;
|
|
dependencies[1].dstSubpass = VK_SUBPASS_EXTERNAL;
|
|
dependencies[1].srcStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
|
|
dependencies[1].dstStageMask = VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT;
|
|
dependencies[1].srcAccessMask = VK_ACCESS_COLOR_ATTACHMENT_READ_BIT | VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
|
|
dependencies[1].dstAccessMask = VK_ACCESS_MEMORY_READ_BIT;
|
|
dependencies[1].dependencyFlags = VK_DEPENDENCY_BY_REGION_BIT;
|
|
|
|
// Renderpass
|
|
VkRenderPassCreateInfo renderPassCI = vks::initializers::renderPassCreateInfo();
|
|
renderPassCI.attachmentCount = 1;
|
|
renderPassCI.pAttachments = &attDesc;
|
|
renderPassCI.subpassCount = 1;
|
|
renderPassCI.pSubpasses = &subpassDescription;
|
|
renderPassCI.dependencyCount = 2;
|
|
renderPassCI.pDependencies = dependencies.data();
|
|
VkRenderPass renderpass;
|
|
VK_CHECK_RESULT(vkCreateRenderPass(device, &renderPassCI, nullptr, &renderpass));
|
|
|
|
struct {
|
|
VkImage image;
|
|
VkImageView view;
|
|
VkDeviceMemory memory;
|
|
VkFramebuffer framebuffer;
|
|
} offscreen;
|
|
|
|
// Offfscreen framebuffer
|
|
{
|
|
// Color attachment
|
|
VkImageCreateInfo imageCreateInfo = vks::initializers::imageCreateInfo();
|
|
imageCreateInfo.imageType = VK_IMAGE_TYPE_2D;
|
|
imageCreateInfo.format = format;
|
|
imageCreateInfo.extent.width = dim;
|
|
imageCreateInfo.extent.height = dim;
|
|
imageCreateInfo.extent.depth = 1;
|
|
imageCreateInfo.mipLevels = 1;
|
|
imageCreateInfo.arrayLayers = 1;
|
|
imageCreateInfo.samples = VK_SAMPLE_COUNT_1_BIT;
|
|
imageCreateInfo.tiling = VK_IMAGE_TILING_OPTIMAL;
|
|
imageCreateInfo.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
|
|
imageCreateInfo.usage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT | VK_IMAGE_USAGE_TRANSFER_SRC_BIT;
|
|
imageCreateInfo.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
|
|
VK_CHECK_RESULT(vkCreateImage(device, &imageCreateInfo, nullptr, &offscreen.image));
|
|
|
|
VkMemoryAllocateInfo memAlloc = vks::initializers::memoryAllocateInfo();
|
|
VkMemoryRequirements memReqs;
|
|
vkGetImageMemoryRequirements(device, offscreen.image, &memReqs);
|
|
memAlloc.allocationSize = memReqs.size;
|
|
memAlloc.memoryTypeIndex = vulkanDevice->getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
|
|
VK_CHECK_RESULT(vkAllocateMemory(device, &memAlloc, nullptr, &offscreen.memory));
|
|
VK_CHECK_RESULT(vkBindImageMemory(device, offscreen.image, offscreen.memory, 0));
|
|
|
|
VkImageViewCreateInfo colorImageView = vks::initializers::imageViewCreateInfo();
|
|
colorImageView.viewType = VK_IMAGE_VIEW_TYPE_2D;
|
|
colorImageView.format = format;
|
|
colorImageView.flags = 0;
|
|
colorImageView.subresourceRange = {};
|
|
colorImageView.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
|
|
colorImageView.subresourceRange.baseMipLevel = 0;
|
|
colorImageView.subresourceRange.levelCount = 1;
|
|
colorImageView.subresourceRange.baseArrayLayer = 0;
|
|
colorImageView.subresourceRange.layerCount = 1;
|
|
colorImageView.image = offscreen.image;
|
|
VK_CHECK_RESULT(vkCreateImageView(device, &colorImageView, nullptr, &offscreen.view));
|
|
|
|
VkFramebufferCreateInfo fbufCreateInfo = vks::initializers::framebufferCreateInfo();
|
|
fbufCreateInfo.renderPass = renderpass;
|
|
fbufCreateInfo.attachmentCount = 1;
|
|
fbufCreateInfo.pAttachments = &offscreen.view;
|
|
fbufCreateInfo.width = dim;
|
|
fbufCreateInfo.height = dim;
|
|
fbufCreateInfo.layers = 1;
|
|
VK_CHECK_RESULT(vkCreateFramebuffer(device, &fbufCreateInfo, nullptr, &offscreen.framebuffer));
|
|
|
|
VkCommandBuffer layoutCmd = vulkanDevice->createCommandBuffer(VK_COMMAND_BUFFER_LEVEL_PRIMARY, true);
|
|
vks::tools::setImageLayout(
|
|
layoutCmd,
|
|
offscreen.image,
|
|
VK_IMAGE_ASPECT_COLOR_BIT,
|
|
VK_IMAGE_LAYOUT_UNDEFINED,
|
|
VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL);
|
|
vulkanDevice->flushCommandBuffer(layoutCmd, queue, true);
|
|
}
|
|
|
|
// Descriptors
|
|
VkDescriptorSetLayout descriptorsetlayout;
|
|
std::vector<VkDescriptorSetLayoutBinding> setLayoutBindings = {
|
|
vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_SHADER_STAGE_FRAGMENT_BIT, 0),
|
|
};
|
|
VkDescriptorSetLayoutCreateInfo descriptorsetlayoutCI = vks::initializers::descriptorSetLayoutCreateInfo(setLayoutBindings);
|
|
VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorsetlayoutCI, nullptr, &descriptorsetlayout));
|
|
|
|
// Descriptor Pool
|
|
std::vector<VkDescriptorPoolSize> poolSizes = { vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1) };
|
|
VkDescriptorPoolCreateInfo descriptorPoolCI = vks::initializers::descriptorPoolCreateInfo(poolSizes, 2);
|
|
VkDescriptorPool descriptorpool;
|
|
VK_CHECK_RESULT(vkCreateDescriptorPool(device, &descriptorPoolCI, nullptr, &descriptorpool));
|
|
|
|
// Descriptor sets
|
|
VkDescriptorSet descriptorset;
|
|
VkDescriptorSetAllocateInfo allocInfo = vks::initializers::descriptorSetAllocateInfo(descriptorpool, &descriptorsetlayout, 1);
|
|
VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorset));
|
|
VkWriteDescriptorSet writeDescriptorSet = vks::initializers::writeDescriptorSet(descriptorset, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 0, &textures.environmentCube.descriptor);
|
|
vkUpdateDescriptorSets(device, 1, &writeDescriptorSet, 0, nullptr);
|
|
|
|
// Pipeline layout
|
|
struct PushBlock {
|
|
glm::mat4 mvp;
|
|
// Sampling deltas
|
|
float deltaPhi = (2.0f * float(M_PI)) / 180.0f;
|
|
float deltaTheta = (0.5f * float(M_PI)) / 64.0f;
|
|
} pushBlock;
|
|
|
|
VkPipelineLayout pipelinelayout;
|
|
std::vector<VkPushConstantRange> pushConstantRanges = {
|
|
vks::initializers::pushConstantRange(VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT, sizeof(PushBlock), 0),
|
|
};
|
|
VkPipelineLayoutCreateInfo pipelineLayoutCI = vks::initializers::pipelineLayoutCreateInfo(&descriptorsetlayout, 1);
|
|
pipelineLayoutCI.pushConstantRangeCount = 1;
|
|
pipelineLayoutCI.pPushConstantRanges = pushConstantRanges.data();
|
|
VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pipelineLayoutCI, nullptr, &pipelinelayout));
|
|
|
|
// Pipeline
|
|
VkPipelineInputAssemblyStateCreateInfo inputAssemblyState = vks::initializers::pipelineInputAssemblyStateCreateInfo(VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST, 0, VK_FALSE);
|
|
VkPipelineRasterizationStateCreateInfo rasterizationState = vks::initializers::pipelineRasterizationStateCreateInfo(VK_POLYGON_MODE_FILL, VK_CULL_MODE_NONE, VK_FRONT_FACE_COUNTER_CLOCKWISE);
|
|
VkPipelineColorBlendAttachmentState blendAttachmentState = vks::initializers::pipelineColorBlendAttachmentState(0xf, VK_FALSE);
|
|
VkPipelineColorBlendStateCreateInfo colorBlendState = vks::initializers::pipelineColorBlendStateCreateInfo(1, &blendAttachmentState);
|
|
VkPipelineDepthStencilStateCreateInfo depthStencilState = vks::initializers::pipelineDepthStencilStateCreateInfo(VK_FALSE, VK_FALSE, VK_COMPARE_OP_LESS_OR_EQUAL);
|
|
VkPipelineViewportStateCreateInfo viewportState = vks::initializers::pipelineViewportStateCreateInfo(1, 1);
|
|
VkPipelineMultisampleStateCreateInfo multisampleState = vks::initializers::pipelineMultisampleStateCreateInfo(VK_SAMPLE_COUNT_1_BIT);
|
|
std::vector<VkDynamicState> dynamicStateEnables = { VK_DYNAMIC_STATE_VIEWPORT, VK_DYNAMIC_STATE_SCISSOR };
|
|
VkPipelineDynamicStateCreateInfo dynamicState = vks::initializers::pipelineDynamicStateCreateInfo(dynamicStateEnables);
|
|
std::array<VkPipelineShaderStageCreateInfo, 2> shaderStages;
|
|
|
|
VkGraphicsPipelineCreateInfo pipelineCI = vks::initializers::pipelineCreateInfo(pipelinelayout, renderpass);
|
|
pipelineCI.pInputAssemblyState = &inputAssemblyState;
|
|
pipelineCI.pRasterizationState = &rasterizationState;
|
|
pipelineCI.pColorBlendState = &colorBlendState;
|
|
pipelineCI.pMultisampleState = &multisampleState;
|
|
pipelineCI.pViewportState = &viewportState;
|
|
pipelineCI.pDepthStencilState = &depthStencilState;
|
|
pipelineCI.pDynamicState = &dynamicState;
|
|
pipelineCI.stageCount = 2;
|
|
pipelineCI.pStages = shaderStages.data();
|
|
pipelineCI.renderPass = renderpass;
|
|
pipelineCI.pVertexInputState = vkglTF::Vertex::getPipelineVertexInputState({ vkglTF::VertexComponent::Position, vkglTF::VertexComponent::Normal, vkglTF::VertexComponent::UV });
|
|
|
|
shaderStages[0] = loadShader(getShadersPath() + "pbribl/filtercube.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
|
|
shaderStages[1] = loadShader(getShadersPath() + "pbribl/irradiancecube.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
|
|
VkPipeline pipeline;
|
|
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCI, nullptr, &pipeline));
|
|
|
|
// Render
|
|
|
|
VkClearValue clearValues[1];
|
|
clearValues[0].color = { { 0.0f, 0.0f, 0.2f, 0.0f } };
|
|
|
|
VkRenderPassBeginInfo renderPassBeginInfo = vks::initializers::renderPassBeginInfo();
|
|
// Reuse render pass from example pass
|
|
renderPassBeginInfo.renderPass = renderpass;
|
|
renderPassBeginInfo.framebuffer = offscreen.framebuffer;
|
|
renderPassBeginInfo.renderArea.extent.width = dim;
|
|
renderPassBeginInfo.renderArea.extent.height = dim;
|
|
renderPassBeginInfo.clearValueCount = 1;
|
|
renderPassBeginInfo.pClearValues = clearValues;
|
|
|
|
std::vector<glm::mat4> matrices = {
|
|
// POSITIVE_X
|
|
glm::rotate(glm::rotate(glm::mat4(1.0f), glm::radians(90.0f), glm::vec3(0.0f, 1.0f, 0.0f)), glm::radians(180.0f), glm::vec3(1.0f, 0.0f, 0.0f)),
|
|
// NEGATIVE_X
|
|
glm::rotate(glm::rotate(glm::mat4(1.0f), glm::radians(-90.0f), glm::vec3(0.0f, 1.0f, 0.0f)), glm::radians(180.0f), glm::vec3(1.0f, 0.0f, 0.0f)),
|
|
// POSITIVE_Y
|
|
glm::rotate(glm::mat4(1.0f), glm::radians(-90.0f), glm::vec3(1.0f, 0.0f, 0.0f)),
|
|
// NEGATIVE_Y
|
|
glm::rotate(glm::mat4(1.0f), glm::radians(90.0f), glm::vec3(1.0f, 0.0f, 0.0f)),
|
|
// POSITIVE_Z
|
|
glm::rotate(glm::mat4(1.0f), glm::radians(180.0f), glm::vec3(1.0f, 0.0f, 0.0f)),
|
|
// NEGATIVE_Z
|
|
glm::rotate(glm::mat4(1.0f), glm::radians(180.0f), glm::vec3(0.0f, 0.0f, 1.0f)),
|
|
};
|
|
|
|
VkCommandBuffer cmdBuf = vulkanDevice->createCommandBuffer(VK_COMMAND_BUFFER_LEVEL_PRIMARY, true);
|
|
|
|
VkViewport viewport = vks::initializers::viewport((float)dim, (float)dim, 0.0f, 1.0f);
|
|
VkRect2D scissor = vks::initializers::rect2D(dim, dim, 0, 0);
|
|
|
|
vkCmdSetViewport(cmdBuf, 0, 1, &viewport);
|
|
vkCmdSetScissor(cmdBuf, 0, 1, &scissor);
|
|
|
|
VkImageSubresourceRange subresourceRange = {};
|
|
subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
|
|
subresourceRange.baseMipLevel = 0;
|
|
subresourceRange.levelCount = numMips;
|
|
subresourceRange.layerCount = 6;
|
|
|
|
// Change image layout for all cubemap faces to transfer destination
|
|
vks::tools::setImageLayout(
|
|
cmdBuf,
|
|
textures.irradianceCube.image,
|
|
VK_IMAGE_LAYOUT_UNDEFINED,
|
|
VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
|
|
subresourceRange);
|
|
|
|
for (uint32_t m = 0; m < numMips; m++) {
|
|
for (uint32_t f = 0; f < 6; f++) {
|
|
viewport.width = static_cast<float>(dim * std::pow(0.5f, m));
|
|
viewport.height = static_cast<float>(dim * std::pow(0.5f, m));
|
|
vkCmdSetViewport(cmdBuf, 0, 1, &viewport);
|
|
|
|
// Render scene from cube face's point of view
|
|
vkCmdBeginRenderPass(cmdBuf, &renderPassBeginInfo, VK_SUBPASS_CONTENTS_INLINE);
|
|
|
|
// Update shader push constant block
|
|
pushBlock.mvp = glm::perspective((float)(M_PI / 2.0), 1.0f, 0.1f, 512.0f) * matrices[f];
|
|
|
|
vkCmdPushConstants(cmdBuf, pipelinelayout, VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT, 0, sizeof(PushBlock), &pushBlock);
|
|
|
|
vkCmdBindPipeline(cmdBuf, VK_PIPELINE_BIND_POINT_GRAPHICS, pipeline);
|
|
vkCmdBindDescriptorSets(cmdBuf, VK_PIPELINE_BIND_POINT_GRAPHICS, pipelinelayout, 0, 1, &descriptorset, 0, NULL);
|
|
|
|
models.skybox.draw(cmdBuf);
|
|
|
|
vkCmdEndRenderPass(cmdBuf);
|
|
|
|
vks::tools::setImageLayout(
|
|
cmdBuf,
|
|
offscreen.image,
|
|
VK_IMAGE_ASPECT_COLOR_BIT,
|
|
VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
|
|
VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL);
|
|
|
|
// Copy region for transfer from framebuffer to cube face
|
|
VkImageCopy copyRegion = {};
|
|
|
|
copyRegion.srcSubresource.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
|
|
copyRegion.srcSubresource.baseArrayLayer = 0;
|
|
copyRegion.srcSubresource.mipLevel = 0;
|
|
copyRegion.srcSubresource.layerCount = 1;
|
|
copyRegion.srcOffset = { 0, 0, 0 };
|
|
|
|
copyRegion.dstSubresource.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
|
|
copyRegion.dstSubresource.baseArrayLayer = f;
|
|
copyRegion.dstSubresource.mipLevel = m;
|
|
copyRegion.dstSubresource.layerCount = 1;
|
|
copyRegion.dstOffset = { 0, 0, 0 };
|
|
|
|
copyRegion.extent.width = static_cast<uint32_t>(viewport.width);
|
|
copyRegion.extent.height = static_cast<uint32_t>(viewport.height);
|
|
copyRegion.extent.depth = 1;
|
|
|
|
vkCmdCopyImage(
|
|
cmdBuf,
|
|
offscreen.image,
|
|
VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL,
|
|
textures.irradianceCube.image,
|
|
VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
|
|
1,
|
|
©Region);
|
|
|
|
// Transform framebuffer color attachment back
|
|
vks::tools::setImageLayout(
|
|
cmdBuf,
|
|
offscreen.image,
|
|
VK_IMAGE_ASPECT_COLOR_BIT,
|
|
VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL,
|
|
VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL);
|
|
}
|
|
}
|
|
|
|
vks::tools::setImageLayout(
|
|
cmdBuf,
|
|
textures.irradianceCube.image,
|
|
VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
|
|
VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL,
|
|
subresourceRange);
|
|
|
|
vulkanDevice->flushCommandBuffer(cmdBuf, queue);
|
|
|
|
// todo: cleanup
|
|
vkDestroyRenderPass(device, renderpass, nullptr);
|
|
vkDestroyFramebuffer(device, offscreen.framebuffer, nullptr);
|
|
vkFreeMemory(device, offscreen.memory, nullptr);
|
|
vkDestroyImageView(device, offscreen.view, nullptr);
|
|
vkDestroyImage(device, offscreen.image, nullptr);
|
|
vkDestroyDescriptorPool(device, descriptorpool, nullptr);
|
|
vkDestroyDescriptorSetLayout(device, descriptorsetlayout, nullptr);
|
|
vkDestroyPipeline(device, pipeline, nullptr);
|
|
vkDestroyPipelineLayout(device, pipelinelayout, nullptr);
|
|
|
|
auto tEnd = std::chrono::high_resolution_clock::now();
|
|
auto tDiff = std::chrono::duration<double, std::milli>(tEnd - tStart).count();
|
|
std::cout << "Generating irradiance cube with " << numMips << " mip levels took " << tDiff << " ms" << std::endl;
|
|
}
|
|
|
|
// Prefilter environment cubemap
|
|
// See https://placeholderart.wordpress.com/2015/07/28/implementation-notes-runtime-environment-map-filtering-for-image-based-lighting/
|
|
void generatePrefilteredCube()
|
|
{
|
|
auto tStart = std::chrono::high_resolution_clock::now();
|
|
|
|
const VkFormat format = VK_FORMAT_R16G16B16A16_SFLOAT;
|
|
const int32_t dim = 512;
|
|
const uint32_t numMips = static_cast<uint32_t>(floor(log2(dim))) + 1;
|
|
|
|
// Pre-filtered cube map
|
|
// Image
|
|
VkImageCreateInfo imageCI = vks::initializers::imageCreateInfo();
|
|
imageCI.imageType = VK_IMAGE_TYPE_2D;
|
|
imageCI.format = format;
|
|
imageCI.extent.width = dim;
|
|
imageCI.extent.height = dim;
|
|
imageCI.extent.depth = 1;
|
|
imageCI.mipLevels = numMips;
|
|
imageCI.arrayLayers = 6;
|
|
imageCI.samples = VK_SAMPLE_COUNT_1_BIT;
|
|
imageCI.tiling = VK_IMAGE_TILING_OPTIMAL;
|
|
imageCI.usage = VK_IMAGE_USAGE_SAMPLED_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT;
|
|
imageCI.flags = VK_IMAGE_CREATE_CUBE_COMPATIBLE_BIT;
|
|
VK_CHECK_RESULT(vkCreateImage(device, &imageCI, nullptr, &textures.prefilteredCube.image));
|
|
VkMemoryAllocateInfo memAlloc = vks::initializers::memoryAllocateInfo();
|
|
VkMemoryRequirements memReqs;
|
|
vkGetImageMemoryRequirements(device, textures.prefilteredCube.image, &memReqs);
|
|
memAlloc.allocationSize = memReqs.size;
|
|
memAlloc.memoryTypeIndex = vulkanDevice->getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
|
|
VK_CHECK_RESULT(vkAllocateMemory(device, &memAlloc, nullptr, &textures.prefilteredCube.deviceMemory));
|
|
VK_CHECK_RESULT(vkBindImageMemory(device, textures.prefilteredCube.image, textures.prefilteredCube.deviceMemory, 0));
|
|
// Image view
|
|
VkImageViewCreateInfo viewCI = vks::initializers::imageViewCreateInfo();
|
|
viewCI.viewType = VK_IMAGE_VIEW_TYPE_CUBE;
|
|
viewCI.format = format;
|
|
viewCI.subresourceRange = {};
|
|
viewCI.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
|
|
viewCI.subresourceRange.levelCount = numMips;
|
|
viewCI.subresourceRange.layerCount = 6;
|
|
viewCI.image = textures.prefilteredCube.image;
|
|
VK_CHECK_RESULT(vkCreateImageView(device, &viewCI, nullptr, &textures.prefilteredCube.view));
|
|
// Sampler
|
|
VkSamplerCreateInfo samplerCI = vks::initializers::samplerCreateInfo();
|
|
samplerCI.magFilter = VK_FILTER_LINEAR;
|
|
samplerCI.minFilter = VK_FILTER_LINEAR;
|
|
samplerCI.mipmapMode = VK_SAMPLER_MIPMAP_MODE_LINEAR;
|
|
samplerCI.addressModeU = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;
|
|
samplerCI.addressModeV = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;
|
|
samplerCI.addressModeW = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;
|
|
samplerCI.minLod = 0.0f;
|
|
samplerCI.maxLod = static_cast<float>(numMips);
|
|
samplerCI.borderColor = VK_BORDER_COLOR_FLOAT_OPAQUE_WHITE;
|
|
VK_CHECK_RESULT(vkCreateSampler(device, &samplerCI, nullptr, &textures.prefilteredCube.sampler));
|
|
|
|
textures.prefilteredCube.descriptor.imageView = textures.prefilteredCube.view;
|
|
textures.prefilteredCube.descriptor.sampler = textures.prefilteredCube.sampler;
|
|
textures.prefilteredCube.descriptor.imageLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
|
|
textures.prefilteredCube.device = vulkanDevice;
|
|
|
|
// FB, Att, RP, Pipe, etc.
|
|
VkAttachmentDescription attDesc = {};
|
|
// Color attachment
|
|
attDesc.format = format;
|
|
attDesc.samples = VK_SAMPLE_COUNT_1_BIT;
|
|
attDesc.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
|
|
attDesc.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
|
|
attDesc.stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
|
|
attDesc.stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
|
|
attDesc.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
|
|
attDesc.finalLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
|
|
VkAttachmentReference colorReference = { 0, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL };
|
|
|
|
VkSubpassDescription subpassDescription = {};
|
|
subpassDescription.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
|
|
subpassDescription.colorAttachmentCount = 1;
|
|
subpassDescription.pColorAttachments = &colorReference;
|
|
|
|
// Use subpass dependencies for layout transitions
|
|
std::array<VkSubpassDependency, 2> dependencies;
|
|
dependencies[0].srcSubpass = VK_SUBPASS_EXTERNAL;
|
|
dependencies[0].dstSubpass = 0;
|
|
dependencies[0].srcStageMask = VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT;
|
|
dependencies[0].dstStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
|
|
dependencies[0].srcAccessMask = VK_ACCESS_MEMORY_READ_BIT;
|
|
dependencies[0].dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_READ_BIT | VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
|
|
dependencies[0].dependencyFlags = VK_DEPENDENCY_BY_REGION_BIT;
|
|
dependencies[1].srcSubpass = 0;
|
|
dependencies[1].dstSubpass = VK_SUBPASS_EXTERNAL;
|
|
dependencies[1].srcStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
|
|
dependencies[1].dstStageMask = VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT;
|
|
dependencies[1].srcAccessMask = VK_ACCESS_COLOR_ATTACHMENT_READ_BIT | VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
|
|
dependencies[1].dstAccessMask = VK_ACCESS_MEMORY_READ_BIT;
|
|
dependencies[1].dependencyFlags = VK_DEPENDENCY_BY_REGION_BIT;
|
|
|
|
// Renderpass
|
|
VkRenderPassCreateInfo renderPassCI = vks::initializers::renderPassCreateInfo();
|
|
renderPassCI.attachmentCount = 1;
|
|
renderPassCI.pAttachments = &attDesc;
|
|
renderPassCI.subpassCount = 1;
|
|
renderPassCI.pSubpasses = &subpassDescription;
|
|
renderPassCI.dependencyCount = 2;
|
|
renderPassCI.pDependencies = dependencies.data();
|
|
VkRenderPass renderpass;
|
|
VK_CHECK_RESULT(vkCreateRenderPass(device, &renderPassCI, nullptr, &renderpass));
|
|
|
|
struct {
|
|
VkImage image;
|
|
VkImageView view;
|
|
VkDeviceMemory memory;
|
|
VkFramebuffer framebuffer;
|
|
} offscreen;
|
|
|
|
// Offfscreen framebuffer
|
|
{
|
|
// Color attachment
|
|
VkImageCreateInfo imageCreateInfo = vks::initializers::imageCreateInfo();
|
|
imageCreateInfo.imageType = VK_IMAGE_TYPE_2D;
|
|
imageCreateInfo.format = format;
|
|
imageCreateInfo.extent.width = dim;
|
|
imageCreateInfo.extent.height = dim;
|
|
imageCreateInfo.extent.depth = 1;
|
|
imageCreateInfo.mipLevels = 1;
|
|
imageCreateInfo.arrayLayers = 1;
|
|
imageCreateInfo.samples = VK_SAMPLE_COUNT_1_BIT;
|
|
imageCreateInfo.tiling = VK_IMAGE_TILING_OPTIMAL;
|
|
imageCreateInfo.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
|
|
imageCreateInfo.usage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT | VK_IMAGE_USAGE_TRANSFER_SRC_BIT;
|
|
imageCreateInfo.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
|
|
VK_CHECK_RESULT(vkCreateImage(device, &imageCreateInfo, nullptr, &offscreen.image));
|
|
|
|
VkMemoryAllocateInfo memAlloc = vks::initializers::memoryAllocateInfo();
|
|
VkMemoryRequirements memReqs;
|
|
vkGetImageMemoryRequirements(device, offscreen.image, &memReqs);
|
|
memAlloc.allocationSize = memReqs.size;
|
|
memAlloc.memoryTypeIndex = vulkanDevice->getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
|
|
VK_CHECK_RESULT(vkAllocateMemory(device, &memAlloc, nullptr, &offscreen.memory));
|
|
VK_CHECK_RESULT(vkBindImageMemory(device, offscreen.image, offscreen.memory, 0));
|
|
|
|
VkImageViewCreateInfo colorImageView = vks::initializers::imageViewCreateInfo();
|
|
colorImageView.viewType = VK_IMAGE_VIEW_TYPE_2D;
|
|
colorImageView.format = format;
|
|
colorImageView.flags = 0;
|
|
colorImageView.subresourceRange = {};
|
|
colorImageView.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
|
|
colorImageView.subresourceRange.baseMipLevel = 0;
|
|
colorImageView.subresourceRange.levelCount = 1;
|
|
colorImageView.subresourceRange.baseArrayLayer = 0;
|
|
colorImageView.subresourceRange.layerCount = 1;
|
|
colorImageView.image = offscreen.image;
|
|
VK_CHECK_RESULT(vkCreateImageView(device, &colorImageView, nullptr, &offscreen.view));
|
|
|
|
VkFramebufferCreateInfo fbufCreateInfo = vks::initializers::framebufferCreateInfo();
|
|
fbufCreateInfo.renderPass = renderpass;
|
|
fbufCreateInfo.attachmentCount = 1;
|
|
fbufCreateInfo.pAttachments = &offscreen.view;
|
|
fbufCreateInfo.width = dim;
|
|
fbufCreateInfo.height = dim;
|
|
fbufCreateInfo.layers = 1;
|
|
VK_CHECK_RESULT(vkCreateFramebuffer(device, &fbufCreateInfo, nullptr, &offscreen.framebuffer));
|
|
|
|
VkCommandBuffer layoutCmd = vulkanDevice->createCommandBuffer(VK_COMMAND_BUFFER_LEVEL_PRIMARY, true);
|
|
vks::tools::setImageLayout(
|
|
layoutCmd,
|
|
offscreen.image,
|
|
VK_IMAGE_ASPECT_COLOR_BIT,
|
|
VK_IMAGE_LAYOUT_UNDEFINED,
|
|
VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL);
|
|
vulkanDevice->flushCommandBuffer(layoutCmd, queue, true);
|
|
}
|
|
|
|
// Descriptors
|
|
VkDescriptorSetLayout descriptorsetlayout;
|
|
std::vector<VkDescriptorSetLayoutBinding> setLayoutBindings = {
|
|
vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_SHADER_STAGE_FRAGMENT_BIT, 0),
|
|
};
|
|
VkDescriptorSetLayoutCreateInfo descriptorsetlayoutCI = vks::initializers::descriptorSetLayoutCreateInfo(setLayoutBindings);
|
|
VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &descriptorsetlayoutCI, nullptr, &descriptorsetlayout));
|
|
|
|
// Descriptor Pool
|
|
std::vector<VkDescriptorPoolSize> poolSizes = { vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1) };
|
|
VkDescriptorPoolCreateInfo descriptorPoolCI = vks::initializers::descriptorPoolCreateInfo(poolSizes, 2);
|
|
VkDescriptorPool descriptorpool;
|
|
VK_CHECK_RESULT(vkCreateDescriptorPool(device, &descriptorPoolCI, nullptr, &descriptorpool));
|
|
|
|
// Descriptor sets
|
|
VkDescriptorSet descriptorset;
|
|
VkDescriptorSetAllocateInfo allocInfo = vks::initializers::descriptorSetAllocateInfo(descriptorpool, &descriptorsetlayout, 1);
|
|
VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorset));
|
|
VkWriteDescriptorSet writeDescriptorSet = vks::initializers::writeDescriptorSet(descriptorset, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 0, &textures.environmentCube.descriptor);
|
|
vkUpdateDescriptorSets(device, 1, &writeDescriptorSet, 0, nullptr);
|
|
|
|
// Pipeline layout
|
|
struct PushBlock {
|
|
glm::mat4 mvp;
|
|
float roughness;
|
|
uint32_t numSamples = 32u;
|
|
} pushBlock;
|
|
|
|
VkPipelineLayout pipelinelayout;
|
|
std::vector<VkPushConstantRange> pushConstantRanges = {
|
|
vks::initializers::pushConstantRange(VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT, sizeof(PushBlock), 0),
|
|
};
|
|
VkPipelineLayoutCreateInfo pipelineLayoutCI = vks::initializers::pipelineLayoutCreateInfo(&descriptorsetlayout, 1);
|
|
pipelineLayoutCI.pushConstantRangeCount = 1;
|
|
pipelineLayoutCI.pPushConstantRanges = pushConstantRanges.data();
|
|
VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pipelineLayoutCI, nullptr, &pipelinelayout));
|
|
|
|
// Pipeline
|
|
VkPipelineInputAssemblyStateCreateInfo inputAssemblyState = vks::initializers::pipelineInputAssemblyStateCreateInfo(VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST, 0, VK_FALSE);
|
|
VkPipelineRasterizationStateCreateInfo rasterizationState = vks::initializers::pipelineRasterizationStateCreateInfo(VK_POLYGON_MODE_FILL, VK_CULL_MODE_NONE, VK_FRONT_FACE_COUNTER_CLOCKWISE);
|
|
VkPipelineColorBlendAttachmentState blendAttachmentState = vks::initializers::pipelineColorBlendAttachmentState(0xf, VK_FALSE);
|
|
VkPipelineColorBlendStateCreateInfo colorBlendState = vks::initializers::pipelineColorBlendStateCreateInfo(1, &blendAttachmentState);
|
|
VkPipelineDepthStencilStateCreateInfo depthStencilState = vks::initializers::pipelineDepthStencilStateCreateInfo(VK_FALSE, VK_FALSE, VK_COMPARE_OP_LESS_OR_EQUAL);
|
|
VkPipelineViewportStateCreateInfo viewportState = vks::initializers::pipelineViewportStateCreateInfo(1, 1);
|
|
VkPipelineMultisampleStateCreateInfo multisampleState = vks::initializers::pipelineMultisampleStateCreateInfo(VK_SAMPLE_COUNT_1_BIT);
|
|
std::vector<VkDynamicState> dynamicStateEnables = { VK_DYNAMIC_STATE_VIEWPORT, VK_DYNAMIC_STATE_SCISSOR };
|
|
VkPipelineDynamicStateCreateInfo dynamicState = vks::initializers::pipelineDynamicStateCreateInfo(dynamicStateEnables);
|
|
std::array<VkPipelineShaderStageCreateInfo, 2> shaderStages;
|
|
|
|
VkGraphicsPipelineCreateInfo pipelineCI = vks::initializers::pipelineCreateInfo(pipelinelayout, renderpass);
|
|
pipelineCI.pInputAssemblyState = &inputAssemblyState;
|
|
pipelineCI.pRasterizationState = &rasterizationState;
|
|
pipelineCI.pColorBlendState = &colorBlendState;
|
|
pipelineCI.pMultisampleState = &multisampleState;
|
|
pipelineCI.pViewportState = &viewportState;
|
|
pipelineCI.pDepthStencilState = &depthStencilState;
|
|
pipelineCI.pDynamicState = &dynamicState;
|
|
pipelineCI.stageCount = 2;
|
|
pipelineCI.pStages = shaderStages.data();
|
|
pipelineCI.renderPass = renderpass;
|
|
pipelineCI.pVertexInputState = vkglTF::Vertex::getPipelineVertexInputState({ vkglTF::VertexComponent::Position, vkglTF::VertexComponent::Normal, vkglTF::VertexComponent::UV });
|
|
|
|
shaderStages[0] = loadShader(getShadersPath() + "pbribl/filtercube.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
|
|
shaderStages[1] = loadShader(getShadersPath() + "pbribl/prefilterenvmap.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
|
|
VkPipeline pipeline;
|
|
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCI, nullptr, &pipeline));
|
|
|
|
// Render
|
|
|
|
VkClearValue clearValues[1];
|
|
clearValues[0].color = { { 0.0f, 0.0f, 0.2f, 0.0f } };
|
|
|
|
VkRenderPassBeginInfo renderPassBeginInfo = vks::initializers::renderPassBeginInfo();
|
|
// Reuse render pass from example pass
|
|
renderPassBeginInfo.renderPass = renderpass;
|
|
renderPassBeginInfo.framebuffer = offscreen.framebuffer;
|
|
renderPassBeginInfo.renderArea.extent.width = dim;
|
|
renderPassBeginInfo.renderArea.extent.height = dim;
|
|
renderPassBeginInfo.clearValueCount = 1;
|
|
renderPassBeginInfo.pClearValues = clearValues;
|
|
|
|
std::vector<glm::mat4> matrices = {
|
|
// POSITIVE_X
|
|
glm::rotate(glm::rotate(glm::mat4(1.0f), glm::radians(90.0f), glm::vec3(0.0f, 1.0f, 0.0f)), glm::radians(180.0f), glm::vec3(1.0f, 0.0f, 0.0f)),
|
|
// NEGATIVE_X
|
|
glm::rotate(glm::rotate(glm::mat4(1.0f), glm::radians(-90.0f), glm::vec3(0.0f, 1.0f, 0.0f)), glm::radians(180.0f), glm::vec3(1.0f, 0.0f, 0.0f)),
|
|
// POSITIVE_Y
|
|
glm::rotate(glm::mat4(1.0f), glm::radians(-90.0f), glm::vec3(1.0f, 0.0f, 0.0f)),
|
|
// NEGATIVE_Y
|
|
glm::rotate(glm::mat4(1.0f), glm::radians(90.0f), glm::vec3(1.0f, 0.0f, 0.0f)),
|
|
// POSITIVE_Z
|
|
glm::rotate(glm::mat4(1.0f), glm::radians(180.0f), glm::vec3(1.0f, 0.0f, 0.0f)),
|
|
// NEGATIVE_Z
|
|
glm::rotate(glm::mat4(1.0f), glm::radians(180.0f), glm::vec3(0.0f, 0.0f, 1.0f)),
|
|
};
|
|
|
|
VkCommandBuffer cmdBuf = vulkanDevice->createCommandBuffer(VK_COMMAND_BUFFER_LEVEL_PRIMARY, true);
|
|
|
|
VkViewport viewport = vks::initializers::viewport((float)dim, (float)dim, 0.0f, 1.0f);
|
|
VkRect2D scissor = vks::initializers::rect2D(dim, dim, 0, 0);
|
|
|
|
vkCmdSetViewport(cmdBuf, 0, 1, &viewport);
|
|
vkCmdSetScissor(cmdBuf, 0, 1, &scissor);
|
|
|
|
VkImageSubresourceRange subresourceRange = {};
|
|
subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
|
|
subresourceRange.baseMipLevel = 0;
|
|
subresourceRange.levelCount = numMips;
|
|
subresourceRange.layerCount = 6;
|
|
|
|
// Change image layout for all cubemap faces to transfer destination
|
|
vks::tools::setImageLayout(
|
|
cmdBuf,
|
|
textures.prefilteredCube.image,
|
|
VK_IMAGE_LAYOUT_UNDEFINED,
|
|
VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
|
|
subresourceRange);
|
|
|
|
for (uint32_t m = 0; m < numMips; m++) {
|
|
pushBlock.roughness = (float)m / (float)(numMips - 1);
|
|
for (uint32_t f = 0; f < 6; f++) {
|
|
viewport.width = static_cast<float>(dim * std::pow(0.5f, m));
|
|
viewport.height = static_cast<float>(dim * std::pow(0.5f, m));
|
|
vkCmdSetViewport(cmdBuf, 0, 1, &viewport);
|
|
|
|
// Render scene from cube face's point of view
|
|
vkCmdBeginRenderPass(cmdBuf, &renderPassBeginInfo, VK_SUBPASS_CONTENTS_INLINE);
|
|
|
|
// Update shader push constant block
|
|
pushBlock.mvp = glm::perspective((float)(M_PI / 2.0), 1.0f, 0.1f, 512.0f) * matrices[f];
|
|
|
|
vkCmdPushConstants(cmdBuf, pipelinelayout, VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT, 0, sizeof(PushBlock), &pushBlock);
|
|
|
|
vkCmdBindPipeline(cmdBuf, VK_PIPELINE_BIND_POINT_GRAPHICS, pipeline);
|
|
vkCmdBindDescriptorSets(cmdBuf, VK_PIPELINE_BIND_POINT_GRAPHICS, pipelinelayout, 0, 1, &descriptorset, 0, NULL);
|
|
|
|
models.skybox.draw(cmdBuf);
|
|
|
|
vkCmdEndRenderPass(cmdBuf);
|
|
|
|
vks::tools::setImageLayout(
|
|
cmdBuf,
|
|
offscreen.image,
|
|
VK_IMAGE_ASPECT_COLOR_BIT,
|
|
VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL,
|
|
VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL);
|
|
|
|
// Copy region for transfer from framebuffer to cube face
|
|
VkImageCopy copyRegion = {};
|
|
|
|
copyRegion.srcSubresource.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
|
|
copyRegion.srcSubresource.baseArrayLayer = 0;
|
|
copyRegion.srcSubresource.mipLevel = 0;
|
|
copyRegion.srcSubresource.layerCount = 1;
|
|
copyRegion.srcOffset = { 0, 0, 0 };
|
|
|
|
copyRegion.dstSubresource.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
|
|
copyRegion.dstSubresource.baseArrayLayer = f;
|
|
copyRegion.dstSubresource.mipLevel = m;
|
|
copyRegion.dstSubresource.layerCount = 1;
|
|
copyRegion.dstOffset = { 0, 0, 0 };
|
|
|
|
copyRegion.extent.width = static_cast<uint32_t>(viewport.width);
|
|
copyRegion.extent.height = static_cast<uint32_t>(viewport.height);
|
|
copyRegion.extent.depth = 1;
|
|
|
|
vkCmdCopyImage(
|
|
cmdBuf,
|
|
offscreen.image,
|
|
VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL,
|
|
textures.prefilteredCube.image,
|
|
VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
|
|
1,
|
|
©Region);
|
|
|
|
// Transform framebuffer color attachment back
|
|
vks::tools::setImageLayout(
|
|
cmdBuf,
|
|
offscreen.image,
|
|
VK_IMAGE_ASPECT_COLOR_BIT,
|
|
VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL,
|
|
VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL);
|
|
}
|
|
}
|
|
|
|
vks::tools::setImageLayout(
|
|
cmdBuf,
|
|
textures.prefilteredCube.image,
|
|
VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
|
|
VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL,
|
|
subresourceRange);
|
|
|
|
vulkanDevice->flushCommandBuffer(cmdBuf, queue);
|
|
|
|
// todo: cleanup
|
|
vkDestroyRenderPass(device, renderpass, nullptr);
|
|
vkDestroyFramebuffer(device, offscreen.framebuffer, nullptr);
|
|
vkFreeMemory(device, offscreen.memory, nullptr);
|
|
vkDestroyImageView(device, offscreen.view, nullptr);
|
|
vkDestroyImage(device, offscreen.image, nullptr);
|
|
vkDestroyDescriptorPool(device, descriptorpool, nullptr);
|
|
vkDestroyDescriptorSetLayout(device, descriptorsetlayout, nullptr);
|
|
vkDestroyPipeline(device, pipeline, nullptr);
|
|
vkDestroyPipelineLayout(device, pipelinelayout, nullptr);
|
|
|
|
auto tEnd = std::chrono::high_resolution_clock::now();
|
|
auto tDiff = std::chrono::duration<double, std::milli>(tEnd - tStart).count();
|
|
std::cout << "Generating pre-filtered enivornment cube with " << numMips << " mip levels took " << tDiff << " ms" << std::endl;
|
|
}
|
|
|
|
// Prepare and initialize uniform buffer containing shader uniforms
|
|
void prepareUniformBuffers()
|
|
{
|
|
// Objact vertex shader uniform buffer
|
|
VK_CHECK_RESULT(vulkanDevice->createBuffer(
|
|
VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
|
|
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
|
|
&uniformBuffers.object,
|
|
sizeof(uboMatrices)));
|
|
|
|
// Skybox vertex shader uniform buffer
|
|
VK_CHECK_RESULT(vulkanDevice->createBuffer(
|
|
VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
|
|
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
|
|
&uniformBuffers.skybox,
|
|
sizeof(uboMatrices)));
|
|
|
|
// Shared parameter uniform buffer
|
|
VK_CHECK_RESULT(vulkanDevice->createBuffer(
|
|
VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
|
|
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
|
|
&uniformBuffers.params,
|
|
sizeof(uboParams)));
|
|
|
|
// Map persistent
|
|
VK_CHECK_RESULT(uniformBuffers.object.map());
|
|
VK_CHECK_RESULT(uniformBuffers.skybox.map());
|
|
VK_CHECK_RESULT(uniformBuffers.params.map());
|
|
|
|
updateUniformBuffers();
|
|
updateParams();
|
|
}
|
|
|
|
void updateUniformBuffers()
|
|
{
|
|
// 3D object
|
|
uboMatrices.projection = camera.matrices.perspective;
|
|
uboMatrices.view = camera.matrices.view;
|
|
uboMatrices.model = glm::rotate(glm::mat4(1.0f), glm::radians(90.0f + (models.objectIndex == 1 ? 45.0f : 0.0f)), glm::vec3(0.0f, 1.0f, 0.0f));
|
|
uboMatrices.camPos = camera.position * -1.0f;
|
|
memcpy(uniformBuffers.object.mapped, &uboMatrices, sizeof(uboMatrices));
|
|
|
|
// Skybox
|
|
uboMatrices.model = glm::mat4(glm::mat3(camera.matrices.view));
|
|
memcpy(uniformBuffers.skybox.mapped, &uboMatrices, sizeof(uboMatrices));
|
|
}
|
|
|
|
void updateParams()
|
|
{
|
|
const float p = 15.0f;
|
|
uboParams.lights[0] = glm::vec4(-p, -p*0.5f, -p, 1.0f);
|
|
uboParams.lights[1] = glm::vec4(-p, -p*0.5f, p, 1.0f);
|
|
uboParams.lights[2] = glm::vec4( p, -p*0.5f, p, 1.0f);
|
|
uboParams.lights[3] = glm::vec4( p, -p*0.5f, -p, 1.0f);
|
|
|
|
memcpy(uniformBuffers.params.mapped, &uboParams, sizeof(uboParams));
|
|
}
|
|
|
|
void draw()
|
|
{
|
|
VulkanExampleBase::prepareFrame();
|
|
|
|
submitInfo.commandBufferCount = 1;
|
|
submitInfo.pCommandBuffers = &drawCmdBuffers[currentBuffer];
|
|
VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE));
|
|
|
|
VulkanExampleBase::submitFrame();
|
|
}
|
|
|
|
void prepare()
|
|
{
|
|
VulkanExampleBase::prepare();
|
|
loadAssets();
|
|
generateBRDFLUT();
|
|
generateIrradianceCube();
|
|
generatePrefilteredCube();
|
|
prepareUniformBuffers();
|
|
setupDescriptors();
|
|
preparePipelines();
|
|
buildCommandBuffers();
|
|
prepared = true;
|
|
}
|
|
|
|
virtual void render()
|
|
{
|
|
if (!prepared)
|
|
return;
|
|
draw();
|
|
}
|
|
|
|
virtual void viewChanged()
|
|
{
|
|
updateUniformBuffers();
|
|
}
|
|
|
|
virtual void OnUpdateUIOverlay(vks::UIOverlay *overlay)
|
|
{
|
|
if (overlay->header("Settings")) {
|
|
if (overlay->comboBox("Material", &materialIndex, materialNames)) {
|
|
buildCommandBuffers();
|
|
}
|
|
if (overlay->comboBox("Object type", &models.objectIndex, objectNames)) {
|
|
updateUniformBuffers();
|
|
buildCommandBuffers();
|
|
}
|
|
if (overlay->inputFloat("Exposure", &uboParams.exposure, 0.1f, 2)) {
|
|
updateParams();
|
|
}
|
|
if (overlay->inputFloat("Gamma", &uboParams.gamma, 0.1f, 2)) {
|
|
updateParams();
|
|
}
|
|
if (overlay->checkBox("Skybox", &displaySkybox)) {
|
|
buildCommandBuffers();
|
|
}
|
|
}
|
|
}
|
|
|
|
};
|
|
|
|
VULKAN_EXAMPLE_MAIN() |