970 lines
44 KiB
C++
970 lines
44 KiB
C++
/*
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* Vulkan Example - Screen space ambient occlusion example
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*
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* Copyright (C) by Sascha Willems - www.saschawillems.de
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*
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* This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
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*/
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#include "vulkanexamplebase.h"
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#include "VulkanglTFModel.h"
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#define ENABLE_VALIDATION false
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#define SSAO_KERNEL_SIZE 64
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#define SSAO_RADIUS 0.3f
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#if defined(__ANDROID__)
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#define SSAO_NOISE_DIM 8
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#else
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#define SSAO_NOISE_DIM 4
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#endif
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class VulkanExample : public VulkanExampleBase
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{
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public:
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struct {
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vks::Texture2D ssaoNoise;
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} textures;
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vkglTF::Model scene;
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struct UBOSceneParams {
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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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float nearPlane = 0.1f;
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float farPlane = 64.0f;
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} uboSceneParams;
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struct UBOSSAOParams {
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glm::mat4 projection;
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int32_t ssao = true;
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int32_t ssaoOnly = false;
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int32_t ssaoBlur = true;
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} uboSSAOParams;
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struct {
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VkPipeline offscreen;
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VkPipeline composition;
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VkPipeline ssao;
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VkPipeline ssaoBlur;
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} pipelines;
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struct {
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VkPipelineLayout gBuffer;
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VkPipelineLayout ssao;
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VkPipelineLayout ssaoBlur;
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VkPipelineLayout composition;
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} pipelineLayouts;
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struct {
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const uint32_t count = 5;
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VkDescriptorSet model;
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VkDescriptorSet floor;
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VkDescriptorSet ssao;
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VkDescriptorSet ssaoBlur;
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VkDescriptorSet composition;
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} descriptorSets;
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struct {
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VkDescriptorSetLayout gBuffer;
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VkDescriptorSetLayout ssao;
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VkDescriptorSetLayout ssaoBlur;
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VkDescriptorSetLayout composition;
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} descriptorSetLayouts;
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struct {
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vks::Buffer sceneParams;
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vks::Buffer ssaoKernel;
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vks::Buffer ssaoParams;
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} uniformBuffers;
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// Framebuffer for offscreen rendering
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struct FrameBufferAttachment {
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VkImage image;
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VkDeviceMemory mem;
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VkImageView view;
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VkFormat format;
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void destroy(VkDevice device)
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{
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vkDestroyImage(device, image, nullptr);
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vkDestroyImageView(device, view, nullptr);
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vkFreeMemory(device, mem, nullptr);
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}
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};
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struct FrameBuffer {
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int32_t width, height;
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VkFramebuffer frameBuffer;
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VkRenderPass renderPass;
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void setSize(int32_t w, int32_t h)
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{
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this->width = w;
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this->height = h;
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}
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void destroy(VkDevice device)
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{
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vkDestroyFramebuffer(device, frameBuffer, nullptr);
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vkDestroyRenderPass(device, renderPass, nullptr);
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}
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};
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struct {
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struct Offscreen : public FrameBuffer {
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FrameBufferAttachment position, normal, albedo, depth;
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} offscreen;
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struct SSAO : public FrameBuffer {
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FrameBufferAttachment color;
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} ssao, ssaoBlur;
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} frameBuffers;
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// One sampler for the frame buffer color attachments
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VkSampler colorSampler;
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VulkanExample() : VulkanExampleBase(ENABLE_VALIDATION)
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{
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title = "Screen space ambient occlusion";
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camera.type = Camera::CameraType::firstperson;
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#ifndef __ANDROID__
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camera.rotationSpeed = 0.25f;
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#endif
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camera.position = { 1.0f, 0.75f, 0.0f };
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camera.setRotation(glm::vec3(0.0f, 90.0f, 0.0f));
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camera.setPerspective(60.0f, (float)width / (float)height, uboSceneParams.nearPlane, uboSceneParams.farPlane);
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}
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~VulkanExample()
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{
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vkDestroySampler(device, colorSampler, nullptr);
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// Attachments
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frameBuffers.offscreen.position.destroy(device);
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frameBuffers.offscreen.normal.destroy(device);
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frameBuffers.offscreen.albedo.destroy(device);
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frameBuffers.offscreen.depth.destroy(device);
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frameBuffers.ssao.color.destroy(device);
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frameBuffers.ssaoBlur.color.destroy(device);
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// Framebuffers
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frameBuffers.offscreen.destroy(device);
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frameBuffers.ssao.destroy(device);
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frameBuffers.ssaoBlur.destroy(device);
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vkDestroyPipeline(device, pipelines.offscreen, nullptr);
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vkDestroyPipeline(device, pipelines.composition, nullptr);
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vkDestroyPipeline(device, pipelines.ssao, nullptr);
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vkDestroyPipeline(device, pipelines.ssaoBlur, nullptr);
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vkDestroyPipelineLayout(device, pipelineLayouts.gBuffer, nullptr);
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vkDestroyPipelineLayout(device, pipelineLayouts.ssao, nullptr);
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vkDestroyPipelineLayout(device, pipelineLayouts.ssaoBlur, nullptr);
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vkDestroyPipelineLayout(device, pipelineLayouts.composition, nullptr);
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vkDestroyDescriptorSetLayout(device, descriptorSetLayouts.gBuffer, nullptr);
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vkDestroyDescriptorSetLayout(device, descriptorSetLayouts.ssao, nullptr);
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vkDestroyDescriptorSetLayout(device, descriptorSetLayouts.ssaoBlur, nullptr);
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vkDestroyDescriptorSetLayout(device, descriptorSetLayouts.composition, nullptr);
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// Uniform buffers
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uniformBuffers.sceneParams.destroy();
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uniformBuffers.ssaoKernel.destroy();
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uniformBuffers.ssaoParams.destroy();
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textures.ssaoNoise.destroy();
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}
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void getEnabledFeatures()
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{
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enabledFeatures.samplerAnisotropy = deviceFeatures.samplerAnisotropy;
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}
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// Create a frame buffer attachment
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void createAttachment(
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VkFormat format,
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VkImageUsageFlagBits usage,
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FrameBufferAttachment *attachment,
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uint32_t width,
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uint32_t height)
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{
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VkImageAspectFlags aspectMask = 0;
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attachment->format = format;
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if (usage & VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT)
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{
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aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
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}
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if (usage & VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT)
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{
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aspectMask = VK_IMAGE_ASPECT_DEPTH_BIT;
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if (format >= VK_FORMAT_D16_UNORM_S8_UINT)
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aspectMask |=VK_IMAGE_ASPECT_STENCIL_BIT;
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}
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assert(aspectMask > 0);
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VkImageCreateInfo image = vks::initializers::imageCreateInfo();
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image.imageType = VK_IMAGE_TYPE_2D;
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image.format = format;
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image.extent.width = width;
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image.extent.height = height;
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image.extent.depth = 1;
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image.mipLevels = 1;
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image.arrayLayers = 1;
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image.samples = VK_SAMPLE_COUNT_1_BIT;
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image.tiling = VK_IMAGE_TILING_OPTIMAL;
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image.usage = usage | VK_IMAGE_USAGE_SAMPLED_BIT;
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VkMemoryAllocateInfo memAlloc = vks::initializers::memoryAllocateInfo();
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VkMemoryRequirements memReqs;
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VK_CHECK_RESULT(vkCreateImage(device, &image, nullptr, &attachment->image));
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vkGetImageMemoryRequirements(device, attachment->image, &memReqs);
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memAlloc.allocationSize = memReqs.size;
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memAlloc.memoryTypeIndex = vulkanDevice->getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
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VK_CHECK_RESULT(vkAllocateMemory(device, &memAlloc, nullptr, &attachment->mem));
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VK_CHECK_RESULT(vkBindImageMemory(device, attachment->image, attachment->mem, 0));
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VkImageViewCreateInfo imageView = vks::initializers::imageViewCreateInfo();
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imageView.viewType = VK_IMAGE_VIEW_TYPE_2D;
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imageView.format = format;
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imageView.subresourceRange = {};
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imageView.subresourceRange.aspectMask = aspectMask;
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imageView.subresourceRange.baseMipLevel = 0;
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imageView.subresourceRange.levelCount = 1;
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imageView.subresourceRange.baseArrayLayer = 0;
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imageView.subresourceRange.layerCount = 1;
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imageView.image = attachment->image;
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VK_CHECK_RESULT(vkCreateImageView(device, &imageView, nullptr, &attachment->view));
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}
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void prepareOffscreenFramebuffers()
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{
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// Attachments
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#if defined(__ANDROID__)
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const uint32_t ssaoWidth = width / 2;
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const uint32_t ssaoHeight = height / 2;
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#else
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const uint32_t ssaoWidth = width;
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const uint32_t ssaoHeight = height;
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#endif
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frameBuffers.offscreen.setSize(width, height);
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frameBuffers.ssao.setSize(ssaoWidth, ssaoHeight);
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frameBuffers.ssaoBlur.setSize(width, height);
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// Find a suitable depth format
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VkFormat attDepthFormat;
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VkBool32 validDepthFormat = vks::tools::getSupportedDepthFormat(physicalDevice, &attDepthFormat);
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assert(validDepthFormat);
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// G-Buffer
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createAttachment(VK_FORMAT_R32G32B32A32_SFLOAT, VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT, &frameBuffers.offscreen.position, width, height); // Position + Depth
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createAttachment(VK_FORMAT_R8G8B8A8_UNORM, VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT, &frameBuffers.offscreen.normal, width, height); // Normals
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createAttachment(VK_FORMAT_R8G8B8A8_UNORM, VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT, &frameBuffers.offscreen.albedo, width, height); // Albedo (color)
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createAttachment(attDepthFormat, VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT, &frameBuffers.offscreen.depth, width, height); // Depth
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// SSAO
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createAttachment(VK_FORMAT_R8_UNORM, VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT, &frameBuffers.ssao.color, ssaoWidth, ssaoHeight); // Color
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// SSAO blur
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createAttachment(VK_FORMAT_R8_UNORM, VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT, &frameBuffers.ssaoBlur.color, width, height); // Color
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// Render passes
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// G-Buffer creation
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{
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std::array<VkAttachmentDescription, 4> attachmentDescs = {};
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// Init attachment properties
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for (uint32_t i = 0; i < static_cast<uint32_t>(attachmentDescs.size()); i++)
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{
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attachmentDescs[i].samples = VK_SAMPLE_COUNT_1_BIT;
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attachmentDescs[i].loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
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attachmentDescs[i].storeOp = VK_ATTACHMENT_STORE_OP_STORE;
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attachmentDescs[i].stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
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attachmentDescs[i].stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
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attachmentDescs[i].finalLayout = (i == 3) ? VK_IMAGE_LAYOUT_DEPTH_STENCIL_READ_ONLY_OPTIMAL : VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
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}
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// Formats
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attachmentDescs[0].format = frameBuffers.offscreen.position.format;
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attachmentDescs[1].format = frameBuffers.offscreen.normal.format;
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attachmentDescs[2].format = frameBuffers.offscreen.albedo.format;
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attachmentDescs[3].format = frameBuffers.offscreen.depth.format;
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std::vector<VkAttachmentReference> colorReferences;
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colorReferences.push_back({ 0, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL });
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colorReferences.push_back({ 1, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL });
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colorReferences.push_back({ 2, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL });
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VkAttachmentReference depthReference = {};
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depthReference.attachment = 3;
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depthReference.layout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;
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VkSubpassDescription subpass = {};
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subpass.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
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subpass.pColorAttachments = colorReferences.data();
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subpass.colorAttachmentCount = static_cast<uint32_t>(colorReferences.size());
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subpass.pDepthStencilAttachment = &depthReference;
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// Use subpass dependencies for attachment layout transitions
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std::array<VkSubpassDependency, 2> dependencies;
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dependencies[0].srcSubpass = VK_SUBPASS_EXTERNAL;
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dependencies[0].dstSubpass = 0;
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dependencies[0].srcStageMask = VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT;
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dependencies[0].dstStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
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dependencies[0].srcAccessMask = VK_ACCESS_SHADER_READ_BIT;
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dependencies[0].dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
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dependencies[0].dependencyFlags = VK_DEPENDENCY_BY_REGION_BIT;
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dependencies[1].srcSubpass = 0;
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dependencies[1].dstSubpass = VK_SUBPASS_EXTERNAL;
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dependencies[1].srcStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
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dependencies[1].dstStageMask = VK_PIPELINE_STAGE_FRAGMENT_SHADER_BIT;
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dependencies[1].srcAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
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dependencies[1].dstAccessMask = VK_ACCESS_SHADER_READ_BIT;
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dependencies[1].dependencyFlags = VK_DEPENDENCY_BY_REGION_BIT;
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VkRenderPassCreateInfo renderPassInfo = {};
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renderPassInfo.sType = VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO;
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renderPassInfo.pAttachments = attachmentDescs.data();
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renderPassInfo.attachmentCount = static_cast<uint32_t>(attachmentDescs.size());
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renderPassInfo.subpassCount = 1;
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renderPassInfo.pSubpasses = &subpass;
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renderPassInfo.dependencyCount = 2;
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renderPassInfo.pDependencies = dependencies.data();
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VK_CHECK_RESULT(vkCreateRenderPass(device, &renderPassInfo, nullptr, &frameBuffers.offscreen.renderPass));
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std::array<VkImageView, 4> attachments;
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attachments[0] = frameBuffers.offscreen.position.view;
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attachments[1] = frameBuffers.offscreen.normal.view;
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attachments[2] = frameBuffers.offscreen.albedo.view;
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attachments[3] = frameBuffers.offscreen.depth.view;
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VkFramebufferCreateInfo fbufCreateInfo = vks::initializers::framebufferCreateInfo();
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fbufCreateInfo.renderPass = frameBuffers.offscreen.renderPass;
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fbufCreateInfo.pAttachments = attachments.data();
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fbufCreateInfo.attachmentCount = static_cast<uint32_t>(attachments.size());
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fbufCreateInfo.width = frameBuffers.offscreen.width;
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fbufCreateInfo.height = frameBuffers.offscreen.height;
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fbufCreateInfo.layers = 1;
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VK_CHECK_RESULT(vkCreateFramebuffer(device, &fbufCreateInfo, nullptr, &frameBuffers.offscreen.frameBuffer));
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}
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// SSAO
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{
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VkAttachmentDescription attachmentDescription{};
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attachmentDescription.format = frameBuffers.ssao.color.format;
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attachmentDescription.samples = VK_SAMPLE_COUNT_1_BIT;
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attachmentDescription.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
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attachmentDescription.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
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attachmentDescription.stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
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attachmentDescription.stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
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attachmentDescription.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
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attachmentDescription.finalLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
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VkAttachmentReference colorReference = { 0, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL };
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VkSubpassDescription subpass = {};
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subpass.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
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subpass.pColorAttachments = &colorReference;
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subpass.colorAttachmentCount = 1;
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std::array<VkSubpassDependency, 2> dependencies;
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dependencies[0].srcSubpass = VK_SUBPASS_EXTERNAL;
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dependencies[0].dstSubpass = 0;
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dependencies[0].srcStageMask = VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT;
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dependencies[0].dstStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
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dependencies[0].srcAccessMask = VK_ACCESS_MEMORY_READ_BIT;
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dependencies[0].dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_READ_BIT | VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
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dependencies[0].dependencyFlags = VK_DEPENDENCY_BY_REGION_BIT;
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dependencies[1].srcSubpass = 0;
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dependencies[1].dstSubpass = VK_SUBPASS_EXTERNAL;
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dependencies[1].srcStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
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dependencies[1].dstStageMask = VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT;
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dependencies[1].srcAccessMask = VK_ACCESS_COLOR_ATTACHMENT_READ_BIT | VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
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dependencies[1].dstAccessMask = VK_ACCESS_MEMORY_READ_BIT;
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dependencies[1].dependencyFlags = VK_DEPENDENCY_BY_REGION_BIT;
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VkRenderPassCreateInfo renderPassInfo = {};
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renderPassInfo.sType = VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO;
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renderPassInfo.pAttachments = &attachmentDescription;
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renderPassInfo.attachmentCount = 1;
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renderPassInfo.subpassCount = 1;
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renderPassInfo.pSubpasses = &subpass;
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renderPassInfo.dependencyCount = 2;
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renderPassInfo.pDependencies = dependencies.data();
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VK_CHECK_RESULT(vkCreateRenderPass(device, &renderPassInfo, nullptr, &frameBuffers.ssao.renderPass));
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VkFramebufferCreateInfo fbufCreateInfo = vks::initializers::framebufferCreateInfo();
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fbufCreateInfo.renderPass = frameBuffers.ssao.renderPass;
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fbufCreateInfo.pAttachments = &frameBuffers.ssao.color.view;
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fbufCreateInfo.attachmentCount = 1;
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fbufCreateInfo.width = frameBuffers.ssao.width;
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fbufCreateInfo.height = frameBuffers.ssao.height;
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fbufCreateInfo.layers = 1;
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VK_CHECK_RESULT(vkCreateFramebuffer(device, &fbufCreateInfo, nullptr, &frameBuffers.ssao.frameBuffer));
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}
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// SSAO Blur
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{
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VkAttachmentDescription attachmentDescription{};
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attachmentDescription.format = frameBuffers.ssaoBlur.color.format;
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attachmentDescription.samples = VK_SAMPLE_COUNT_1_BIT;
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attachmentDescription.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
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attachmentDescription.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
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attachmentDescription.stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
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attachmentDescription.stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
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attachmentDescription.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
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attachmentDescription.finalLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
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VkAttachmentReference colorReference = { 0, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL };
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VkSubpassDescription subpass = {};
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subpass.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
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subpass.pColorAttachments = &colorReference;
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subpass.colorAttachmentCount = 1;
|
|
|
|
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;
|
|
|
|
VkRenderPassCreateInfo renderPassInfo = {};
|
|
renderPassInfo.sType = VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO;
|
|
renderPassInfo.pAttachments = &attachmentDescription;
|
|
renderPassInfo.attachmentCount = 1;
|
|
renderPassInfo.subpassCount = 1;
|
|
renderPassInfo.pSubpasses = &subpass;
|
|
renderPassInfo.dependencyCount = 2;
|
|
renderPassInfo.pDependencies = dependencies.data();
|
|
VK_CHECK_RESULT(vkCreateRenderPass(device, &renderPassInfo, nullptr, &frameBuffers.ssaoBlur.renderPass));
|
|
|
|
VkFramebufferCreateInfo fbufCreateInfo = vks::initializers::framebufferCreateInfo();
|
|
fbufCreateInfo.renderPass = frameBuffers.ssaoBlur.renderPass;
|
|
fbufCreateInfo.pAttachments = &frameBuffers.ssaoBlur.color.view;
|
|
fbufCreateInfo.attachmentCount = 1;
|
|
fbufCreateInfo.width = frameBuffers.ssaoBlur.width;
|
|
fbufCreateInfo.height = frameBuffers.ssaoBlur.height;
|
|
fbufCreateInfo.layers = 1;
|
|
VK_CHECK_RESULT(vkCreateFramebuffer(device, &fbufCreateInfo, nullptr, &frameBuffers.ssaoBlur.frameBuffer));
|
|
}
|
|
|
|
// Shared sampler used for all color attachments
|
|
VkSamplerCreateInfo sampler = vks::initializers::samplerCreateInfo();
|
|
sampler.magFilter = VK_FILTER_NEAREST;
|
|
sampler.minFilter = VK_FILTER_NEAREST;
|
|
sampler.mipmapMode = VK_SAMPLER_MIPMAP_MODE_LINEAR;
|
|
sampler.addressModeU = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;
|
|
sampler.addressModeV = sampler.addressModeU;
|
|
sampler.addressModeW = sampler.addressModeU;
|
|
sampler.mipLodBias = 0.0f;
|
|
sampler.maxAnisotropy = 1.0f;
|
|
sampler.minLod = 0.0f;
|
|
sampler.maxLod = 1.0f;
|
|
sampler.borderColor = VK_BORDER_COLOR_FLOAT_OPAQUE_WHITE;
|
|
VK_CHECK_RESULT(vkCreateSampler(device, &sampler, nullptr, &colorSampler));
|
|
}
|
|
|
|
void loadAssets()
|
|
{
|
|
vkglTF::descriptorBindingFlags = vkglTF::DescriptorBindingFlags::ImageBaseColor;
|
|
const uint32_t gltfLoadingFlags = vkglTF::FileLoadingFlags::FlipY | vkglTF::FileLoadingFlags::PreTransformVertices;
|
|
scene.loadFromFile(getAssetPath() + "models/sponza/sponza.gltf", vulkanDevice, queue, gltfLoadingFlags);
|
|
}
|
|
|
|
void buildCommandBuffers()
|
|
{
|
|
VkCommandBufferBeginInfo cmdBufInfo = vks::initializers::commandBufferBeginInfo();
|
|
|
|
VkDeviceSize offsets[1] = { 0 };
|
|
|
|
for (int32_t i = 0; i < drawCmdBuffers.size(); ++i)
|
|
{
|
|
VK_CHECK_RESULT(vkBeginCommandBuffer(drawCmdBuffers[i], &cmdBufInfo));
|
|
|
|
/*
|
|
Offscreen SSAO generation
|
|
*/
|
|
{
|
|
// Clear values for all attachments written in the fragment shader
|
|
std::vector<VkClearValue> clearValues(4);
|
|
clearValues[0].color = { { 0.0f, 0.0f, 0.0f, 1.0f } };
|
|
clearValues[1].color = { { 0.0f, 0.0f, 0.0f, 1.0f } };
|
|
clearValues[2].color = { { 0.0f, 0.0f, 0.0f, 1.0f } };
|
|
clearValues[3].depthStencil = { 1.0f, 0 };
|
|
|
|
VkRenderPassBeginInfo renderPassBeginInfo = vks::initializers::renderPassBeginInfo();
|
|
renderPassBeginInfo.renderPass = frameBuffers.offscreen.renderPass;
|
|
renderPassBeginInfo.framebuffer = frameBuffers.offscreen.frameBuffer;
|
|
renderPassBeginInfo.renderArea.extent.width = frameBuffers.offscreen.width;
|
|
renderPassBeginInfo.renderArea.extent.height = frameBuffers.offscreen.height;
|
|
renderPassBeginInfo.clearValueCount = static_cast<uint32_t>(clearValues.size());
|
|
renderPassBeginInfo.pClearValues = clearValues.data();
|
|
|
|
/*
|
|
First pass: Fill G-Buffer components (positions+depth, normals, albedo) using MRT
|
|
*/
|
|
|
|
vkCmdBeginRenderPass(drawCmdBuffers[i], &renderPassBeginInfo, VK_SUBPASS_CONTENTS_INLINE);
|
|
|
|
VkViewport viewport = vks::initializers::viewport((float)frameBuffers.offscreen.width, (float)frameBuffers.offscreen.height, 0.0f, 1.0f);
|
|
vkCmdSetViewport(drawCmdBuffers[i], 0, 1, &viewport);
|
|
|
|
VkRect2D scissor = vks::initializers::rect2D(frameBuffers.offscreen.width, frameBuffers.offscreen.height, 0, 0);
|
|
vkCmdSetScissor(drawCmdBuffers[i], 0, 1, &scissor);
|
|
|
|
vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.offscreen);
|
|
|
|
vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayouts.gBuffer, 0, 1, &descriptorSets.floor, 0, NULL);
|
|
scene.draw(drawCmdBuffers[i], vkglTF::RenderFlags::BindImages, pipelineLayouts.gBuffer);
|
|
|
|
vkCmdEndRenderPass(drawCmdBuffers[i]);
|
|
|
|
/*
|
|
Second pass: SSAO generation
|
|
*/
|
|
|
|
clearValues[0].color = { { 0.0f, 0.0f, 0.0f, 1.0f } };
|
|
clearValues[1].depthStencil = { 1.0f, 0 };
|
|
|
|
renderPassBeginInfo.framebuffer = frameBuffers.ssao.frameBuffer;
|
|
renderPassBeginInfo.renderPass = frameBuffers.ssao.renderPass;
|
|
renderPassBeginInfo.renderArea.extent.width = frameBuffers.ssao.width;
|
|
renderPassBeginInfo.renderArea.extent.height = frameBuffers.ssao.height;
|
|
renderPassBeginInfo.clearValueCount = 2;
|
|
renderPassBeginInfo.pClearValues = clearValues.data();
|
|
|
|
vkCmdBeginRenderPass(drawCmdBuffers[i], &renderPassBeginInfo, VK_SUBPASS_CONTENTS_INLINE);
|
|
|
|
viewport = vks::initializers::viewport((float)frameBuffers.ssao.width, (float)frameBuffers.ssao.height, 0.0f, 1.0f);
|
|
vkCmdSetViewport(drawCmdBuffers[i], 0, 1, &viewport);
|
|
scissor = vks::initializers::rect2D(frameBuffers.ssao.width, frameBuffers.ssao.height, 0, 0);
|
|
vkCmdSetScissor(drawCmdBuffers[i], 0, 1, &scissor);
|
|
|
|
vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayouts.ssao, 0, 1, &descriptorSets.ssao, 0, NULL);
|
|
vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.ssao);
|
|
vkCmdDraw(drawCmdBuffers[i], 3, 1, 0, 0);
|
|
|
|
vkCmdEndRenderPass(drawCmdBuffers[i]);
|
|
|
|
/*
|
|
Third pass: SSAO blur
|
|
*/
|
|
|
|
renderPassBeginInfo.framebuffer = frameBuffers.ssaoBlur.frameBuffer;
|
|
renderPassBeginInfo.renderPass = frameBuffers.ssaoBlur.renderPass;
|
|
renderPassBeginInfo.renderArea.extent.width = frameBuffers.ssaoBlur.width;
|
|
renderPassBeginInfo.renderArea.extent.height = frameBuffers.ssaoBlur.height;
|
|
|
|
vkCmdBeginRenderPass(drawCmdBuffers[i], &renderPassBeginInfo, VK_SUBPASS_CONTENTS_INLINE);
|
|
|
|
viewport = vks::initializers::viewport((float)frameBuffers.ssaoBlur.width, (float)frameBuffers.ssaoBlur.height, 0.0f, 1.0f);
|
|
vkCmdSetViewport(drawCmdBuffers[i], 0, 1, &viewport);
|
|
scissor = vks::initializers::rect2D(frameBuffers.ssaoBlur.width, frameBuffers.ssaoBlur.height, 0, 0);
|
|
vkCmdSetScissor(drawCmdBuffers[i], 0, 1, &scissor);
|
|
|
|
vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayouts.ssaoBlur, 0, 1, &descriptorSets.ssaoBlur, 0, NULL);
|
|
vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.ssaoBlur);
|
|
vkCmdDraw(drawCmdBuffers[i], 3, 1, 0, 0);
|
|
|
|
vkCmdEndRenderPass(drawCmdBuffers[i]);
|
|
}
|
|
|
|
/*
|
|
Note: Explicit synchronization is not required between the render pass, as this is done implicit via sub pass dependencies
|
|
*/
|
|
|
|
/*
|
|
Final render pass: Scene rendering with applied radial blur
|
|
*/
|
|
{
|
|
std::vector<VkClearValue> clearValues(2);
|
|
clearValues[0].color = defaultClearColor;
|
|
clearValues[1].depthStencil = { 1.0f, 0 };
|
|
|
|
VkRenderPassBeginInfo renderPassBeginInfo = vks::initializers::renderPassBeginInfo();
|
|
renderPassBeginInfo.renderPass = renderPass;
|
|
renderPassBeginInfo.framebuffer = VulkanExampleBase::frameBuffers[i];
|
|
renderPassBeginInfo.renderArea.extent.width = width;
|
|
renderPassBeginInfo.renderArea.extent.height = height;
|
|
renderPassBeginInfo.clearValueCount = 2;
|
|
renderPassBeginInfo.pClearValues = clearValues.data();
|
|
|
|
vkCmdBeginRenderPass(drawCmdBuffers[i], &renderPassBeginInfo, VK_SUBPASS_CONTENTS_INLINE);
|
|
|
|
VkViewport viewport = vks::initializers::viewport((float)width, (float)height, 0.0f, 1.0f);
|
|
vkCmdSetViewport(drawCmdBuffers[i], 0, 1, &viewport);
|
|
|
|
VkRect2D scissor = vks::initializers::rect2D(width, height, 0, 0);
|
|
vkCmdSetScissor(drawCmdBuffers[i], 0, 1, &scissor);
|
|
|
|
vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayouts.composition, 0, 1, &descriptorSets.composition, 0, NULL);
|
|
|
|
// Final composition pass
|
|
vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines.composition);
|
|
vkCmdDraw(drawCmdBuffers[i], 3, 1, 0, 0);
|
|
|
|
drawUI(drawCmdBuffers[i]);
|
|
|
|
vkCmdEndRenderPass(drawCmdBuffers[i]);
|
|
}
|
|
|
|
VK_CHECK_RESULT(vkEndCommandBuffer(drawCmdBuffers[i]));
|
|
}
|
|
}
|
|
|
|
void setupDescriptorPool()
|
|
{
|
|
std::vector<VkDescriptorPoolSize> poolSizes = {
|
|
vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 10),
|
|
vks::initializers::descriptorPoolSize(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 12)
|
|
};
|
|
VkDescriptorPoolCreateInfo descriptorPoolInfo = vks::initializers::descriptorPoolCreateInfo(poolSizes, descriptorSets.count);
|
|
VK_CHECK_RESULT(vkCreateDescriptorPool(device, &descriptorPoolInfo, nullptr, &descriptorPool));
|
|
}
|
|
|
|
void setupLayoutsAndDescriptors()
|
|
{
|
|
std::vector<VkDescriptorSetLayoutBinding> setLayoutBindings;
|
|
VkDescriptorSetLayoutCreateInfo setLayoutCreateInfo;
|
|
VkPipelineLayoutCreateInfo pipelineLayoutCreateInfo = vks::initializers::pipelineLayoutCreateInfo();
|
|
VkDescriptorSetAllocateInfo descriptorAllocInfo = vks::initializers::descriptorSetAllocateInfo(descriptorPool, nullptr, 1);
|
|
std::vector<VkWriteDescriptorSet> writeDescriptorSets;
|
|
std::vector<VkDescriptorImageInfo> imageDescriptors;
|
|
|
|
// G-Buffer creation (offscreen scene rendering)
|
|
setLayoutBindings = {
|
|
vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT, 0), // VS + FS Parameter UBO
|
|
};
|
|
setLayoutCreateInfo = vks::initializers::descriptorSetLayoutCreateInfo(setLayoutBindings.data(), static_cast<uint32_t>(setLayoutBindings.size()));
|
|
VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &setLayoutCreateInfo, nullptr, &descriptorSetLayouts.gBuffer));
|
|
|
|
const std::vector<VkDescriptorSetLayout> setLayouts = { descriptorSetLayouts.gBuffer, vkglTF::descriptorSetLayoutImage };
|
|
pipelineLayoutCreateInfo.pSetLayouts = setLayouts.data();
|
|
pipelineLayoutCreateInfo.setLayoutCount = 2;
|
|
VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pipelineLayoutCreateInfo, nullptr, &pipelineLayouts.gBuffer));
|
|
descriptorAllocInfo.pSetLayouts = &descriptorSetLayouts.gBuffer;
|
|
VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &descriptorAllocInfo, &descriptorSets.floor));
|
|
writeDescriptorSets = {
|
|
vks::initializers::writeDescriptorSet(descriptorSets.floor, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 0, &uniformBuffers.sceneParams.descriptor),
|
|
};
|
|
vkUpdateDescriptorSets(device, static_cast<uint32_t>(writeDescriptorSets.size()), writeDescriptorSets.data(), 0, NULL);
|
|
pipelineLayoutCreateInfo.setLayoutCount = 1;
|
|
|
|
// SSAO Generation
|
|
setLayoutBindings = {
|
|
vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_SHADER_STAGE_FRAGMENT_BIT, 0), // FS Position+Depth
|
|
vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_SHADER_STAGE_FRAGMENT_BIT, 1), // FS Normals
|
|
vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_SHADER_STAGE_FRAGMENT_BIT, 2), // FS SSAO Noise
|
|
vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, VK_SHADER_STAGE_FRAGMENT_BIT, 3), // FS SSAO Kernel UBO
|
|
vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, VK_SHADER_STAGE_FRAGMENT_BIT, 4), // FS Params UBO
|
|
};
|
|
setLayoutCreateInfo = vks::initializers::descriptorSetLayoutCreateInfo(setLayoutBindings.data(), static_cast<uint32_t>(setLayoutBindings.size()));
|
|
VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &setLayoutCreateInfo, nullptr, &descriptorSetLayouts.ssao));
|
|
pipelineLayoutCreateInfo.pSetLayouts = &descriptorSetLayouts.ssao;
|
|
VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pipelineLayoutCreateInfo, nullptr, &pipelineLayouts.ssao));
|
|
descriptorAllocInfo.pSetLayouts = &descriptorSetLayouts.ssao;
|
|
VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &descriptorAllocInfo, &descriptorSets.ssao));
|
|
imageDescriptors = {
|
|
vks::initializers::descriptorImageInfo(colorSampler, frameBuffers.offscreen.position.view, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL),
|
|
vks::initializers::descriptorImageInfo(colorSampler, frameBuffers.offscreen.normal.view, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL),
|
|
};
|
|
writeDescriptorSets = {
|
|
vks::initializers::writeDescriptorSet(descriptorSets.ssao, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 0, &imageDescriptors[0]), // FS Position+Depth
|
|
vks::initializers::writeDescriptorSet(descriptorSets.ssao, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1, &imageDescriptors[1]), // FS Normals
|
|
vks::initializers::writeDescriptorSet(descriptorSets.ssao, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 2, &textures.ssaoNoise.descriptor), // FS SSAO Noise
|
|
vks::initializers::writeDescriptorSet(descriptorSets.ssao, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 3, &uniformBuffers.ssaoKernel.descriptor), // FS SSAO Kernel UBO
|
|
vks::initializers::writeDescriptorSet(descriptorSets.ssao, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 4, &uniformBuffers.ssaoParams.descriptor), // FS SSAO Params UBO
|
|
};
|
|
vkUpdateDescriptorSets(device, static_cast<uint32_t>(writeDescriptorSets.size()), writeDescriptorSets.data(), 0, NULL);
|
|
|
|
// SSAO Blur
|
|
setLayoutBindings = {
|
|
vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_SHADER_STAGE_FRAGMENT_BIT, 0), // FS Sampler SSAO
|
|
};
|
|
setLayoutCreateInfo = vks::initializers::descriptorSetLayoutCreateInfo(setLayoutBindings.data(), static_cast<uint32_t>(setLayoutBindings.size()));
|
|
VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &setLayoutCreateInfo, nullptr, &descriptorSetLayouts.ssaoBlur));
|
|
pipelineLayoutCreateInfo.pSetLayouts = &descriptorSetLayouts.ssaoBlur;
|
|
VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pipelineLayoutCreateInfo, nullptr, &pipelineLayouts.ssaoBlur));
|
|
descriptorAllocInfo.pSetLayouts = &descriptorSetLayouts.ssaoBlur;
|
|
VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &descriptorAllocInfo, &descriptorSets.ssaoBlur));
|
|
imageDescriptors = {
|
|
vks::initializers::descriptorImageInfo(colorSampler, frameBuffers.ssao.color.view, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL),
|
|
};
|
|
writeDescriptorSets = {
|
|
vks::initializers::writeDescriptorSet(descriptorSets.ssaoBlur, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 0, &imageDescriptors[0]),
|
|
};
|
|
vkUpdateDescriptorSets(device, static_cast<uint32_t>(writeDescriptorSets.size()), writeDescriptorSets.data(), 0, NULL);
|
|
|
|
// Composition
|
|
setLayoutBindings = {
|
|
vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_SHADER_STAGE_FRAGMENT_BIT, 0), // FS Position+Depth
|
|
vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_SHADER_STAGE_FRAGMENT_BIT, 1), // FS Normals
|
|
vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_SHADER_STAGE_FRAGMENT_BIT, 2), // FS Albedo
|
|
vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_SHADER_STAGE_FRAGMENT_BIT, 3), // FS SSAO
|
|
vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_SHADER_STAGE_FRAGMENT_BIT, 4), // FS SSAO blurred
|
|
vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, VK_SHADER_STAGE_FRAGMENT_BIT, 5), // FS Lights UBO
|
|
};
|
|
setLayoutCreateInfo = vks::initializers::descriptorSetLayoutCreateInfo(setLayoutBindings.data(), static_cast<uint32_t>(setLayoutBindings.size()));
|
|
VK_CHECK_RESULT(vkCreateDescriptorSetLayout(device, &setLayoutCreateInfo, nullptr, &descriptorSetLayouts.composition));
|
|
pipelineLayoutCreateInfo.pSetLayouts = &descriptorSetLayouts.composition;
|
|
VK_CHECK_RESULT(vkCreatePipelineLayout(device, &pipelineLayoutCreateInfo, nullptr, &pipelineLayouts.composition));
|
|
descriptorAllocInfo.pSetLayouts = &descriptorSetLayouts.composition;
|
|
VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &descriptorAllocInfo, &descriptorSets.composition));
|
|
imageDescriptors = {
|
|
vks::initializers::descriptorImageInfo(colorSampler, frameBuffers.offscreen.position.view, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL),
|
|
vks::initializers::descriptorImageInfo(colorSampler, frameBuffers.offscreen.normal.view, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL),
|
|
vks::initializers::descriptorImageInfo(colorSampler, frameBuffers.offscreen.albedo.view, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL),
|
|
vks::initializers::descriptorImageInfo(colorSampler, frameBuffers.ssao.color.view, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL),
|
|
vks::initializers::descriptorImageInfo(colorSampler, frameBuffers.ssaoBlur.color.view, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL),
|
|
};
|
|
writeDescriptorSets = {
|
|
vks::initializers::writeDescriptorSet(descriptorSets.composition, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 0, &imageDescriptors[0]), // FS Sampler Position+Depth
|
|
vks::initializers::writeDescriptorSet(descriptorSets.composition, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1, &imageDescriptors[1]), // FS Sampler Normals
|
|
vks::initializers::writeDescriptorSet(descriptorSets.composition, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 2, &imageDescriptors[2]), // FS Sampler Albedo
|
|
vks::initializers::writeDescriptorSet(descriptorSets.composition, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 3, &imageDescriptors[3]), // FS Sampler SSAO
|
|
vks::initializers::writeDescriptorSet(descriptorSets.composition, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 4, &imageDescriptors[4]), // FS Sampler SSAO blurred
|
|
vks::initializers::writeDescriptorSet(descriptorSets.composition, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 5, &uniformBuffers.ssaoParams.descriptor), // FS SSAO Params UBO
|
|
};
|
|
vkUpdateDescriptorSets(device, static_cast<uint32_t>(writeDescriptorSets.size()), writeDescriptorSets.data(), 0, NULL);
|
|
}
|
|
|
|
void preparePipelines()
|
|
{
|
|
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_BACK_BIT, VK_FRONT_FACE_COUNTER_CLOCKWISE, 0);
|
|
VkPipelineColorBlendAttachmentState blendAttachmentState = vks::initializers::pipelineColorBlendAttachmentState(0xf, VK_FALSE);
|
|
VkPipelineColorBlendStateCreateInfo colorBlendState = vks::initializers::pipelineColorBlendStateCreateInfo(1, &blendAttachmentState);
|
|
VkPipelineDepthStencilStateCreateInfo depthStencilState = vks::initializers::pipelineDepthStencilStateCreateInfo(VK_TRUE, VK_TRUE, VK_COMPARE_OP_LESS_OR_EQUAL);
|
|
VkPipelineViewportStateCreateInfo viewportState = vks::initializers::pipelineViewportStateCreateInfo(1, 1, 0);
|
|
VkPipelineMultisampleStateCreateInfo multisampleState = vks::initializers::pipelineMultisampleStateCreateInfo(VK_SAMPLE_COUNT_1_BIT, 0);
|
|
std::vector<VkDynamicState> dynamicStateEnables = { VK_DYNAMIC_STATE_VIEWPORT, VK_DYNAMIC_STATE_SCISSOR };
|
|
VkPipelineDynamicStateCreateInfo dynamicState = vks::initializers::pipelineDynamicStateCreateInfo(dynamicStateEnables);
|
|
std::array<VkPipelineShaderStageCreateInfo, 2> shaderStages;
|
|
|
|
VkGraphicsPipelineCreateInfo pipelineCreateInfo = vks::initializers::pipelineCreateInfo( pipelineLayouts.composition, renderPass, 0);
|
|
pipelineCreateInfo.pInputAssemblyState = &inputAssemblyState;
|
|
pipelineCreateInfo.pRasterizationState = &rasterizationState;
|
|
pipelineCreateInfo.pColorBlendState = &colorBlendState;
|
|
pipelineCreateInfo.pMultisampleState = &multisampleState;
|
|
pipelineCreateInfo.pViewportState = &viewportState;
|
|
pipelineCreateInfo.pDepthStencilState = &depthStencilState;
|
|
pipelineCreateInfo.pDynamicState = &dynamicState;
|
|
pipelineCreateInfo.stageCount = static_cast<uint32_t>(shaderStages.size());
|
|
pipelineCreateInfo.pStages = shaderStages.data();
|
|
|
|
// Empty vertex input state for fullscreen passes
|
|
VkPipelineVertexInputStateCreateInfo emptyVertexInputState = vks::initializers::pipelineVertexInputStateCreateInfo();
|
|
pipelineCreateInfo.pVertexInputState = &emptyVertexInputState;
|
|
rasterizationState.cullMode = VK_CULL_MODE_FRONT_BIT;
|
|
|
|
// Final composition pipeline
|
|
shaderStages[0] = loadShader(getShadersPath() + "ssao/fullscreen.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
|
|
shaderStages[1] = loadShader(getShadersPath() + "ssao/composition.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
|
|
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.composition));
|
|
|
|
// SSAO generation pipeline
|
|
{
|
|
pipelineCreateInfo.renderPass = frameBuffers.ssao.renderPass;
|
|
pipelineCreateInfo.layout = pipelineLayouts.ssao;
|
|
// SSAO Kernel size and radius are constant for this pipeline, so we set them using specialization constants
|
|
struct SpecializationData {
|
|
uint32_t kernelSize = SSAO_KERNEL_SIZE;
|
|
float radius = SSAO_RADIUS;
|
|
} specializationData;
|
|
std::array<VkSpecializationMapEntry, 2> specializationMapEntries = {
|
|
vks::initializers::specializationMapEntry(0, offsetof(SpecializationData, kernelSize), sizeof(SpecializationData::kernelSize)),
|
|
vks::initializers::specializationMapEntry(1, offsetof(SpecializationData, radius), sizeof(SpecializationData::radius))
|
|
};
|
|
VkSpecializationInfo specializationInfo = vks::initializers::specializationInfo(2, specializationMapEntries.data(), sizeof(specializationData), &specializationData);
|
|
shaderStages[1] = loadShader(getShadersPath() + "ssao/ssao.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
|
|
shaderStages[1].pSpecializationInfo = &specializationInfo;
|
|
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.ssao));
|
|
}
|
|
|
|
// SSAO blur pipeline
|
|
{
|
|
pipelineCreateInfo.renderPass = frameBuffers.ssaoBlur.renderPass;
|
|
pipelineCreateInfo.layout = pipelineLayouts.ssaoBlur;
|
|
shaderStages[1] = loadShader(getShadersPath() + "ssao/blur.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
|
|
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.ssaoBlur));
|
|
}
|
|
|
|
// Fill G-Buffer pipeline
|
|
{
|
|
// Vertex input state from glTF model loader
|
|
pipelineCreateInfo.pVertexInputState = vkglTF::Vertex::getPipelineVertexInputState({ vkglTF::VertexComponent::Position, vkglTF::VertexComponent::UV, vkglTF::VertexComponent::Color, vkglTF::VertexComponent::Normal });
|
|
pipelineCreateInfo.renderPass = frameBuffers.offscreen.renderPass;
|
|
pipelineCreateInfo.layout = pipelineLayouts.gBuffer;
|
|
// Blend attachment states required for all color attachments
|
|
// This is important, as color write mask will otherwise be 0x0 and you
|
|
// won't see anything rendered to the attachment
|
|
std::array<VkPipelineColorBlendAttachmentState, 3> blendAttachmentStates = {
|
|
vks::initializers::pipelineColorBlendAttachmentState(0xf, VK_FALSE),
|
|
vks::initializers::pipelineColorBlendAttachmentState(0xf, VK_FALSE),
|
|
vks::initializers::pipelineColorBlendAttachmentState(0xf, VK_FALSE)
|
|
};
|
|
colorBlendState.attachmentCount = static_cast<uint32_t>(blendAttachmentStates.size());
|
|
colorBlendState.pAttachments = blendAttachmentStates.data();
|
|
rasterizationState.cullMode = VK_CULL_MODE_BACK_BIT;
|
|
shaderStages[0] = loadShader(getShadersPath() + "ssao/gbuffer.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
|
|
shaderStages[1] = loadShader(getShadersPath() + "ssao/gbuffer.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
|
|
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.offscreen));
|
|
}
|
|
}
|
|
|
|
float lerp(float a, float b, float f)
|
|
{
|
|
return a + f * (b - a);
|
|
}
|
|
|
|
// Prepare and initialize uniform buffer containing shader uniforms
|
|
void prepareUniformBuffers()
|
|
{
|
|
// Scene matrices
|
|
vulkanDevice->createBuffer(
|
|
VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
|
|
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
|
|
&uniformBuffers.sceneParams,
|
|
sizeof(uboSceneParams));
|
|
|
|
// SSAO parameters
|
|
vulkanDevice->createBuffer(
|
|
VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
|
|
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
|
|
&uniformBuffers.ssaoParams,
|
|
sizeof(uboSSAOParams));
|
|
|
|
// Update
|
|
updateUniformBufferMatrices();
|
|
updateUniformBufferSSAOParams();
|
|
|
|
// SSAO
|
|
std::default_random_engine rndEngine(benchmark.active ? 0 : (unsigned)time(nullptr));
|
|
std::uniform_real_distribution<float> rndDist(0.0f, 1.0f);
|
|
|
|
// Sample kernel
|
|
std::vector<glm::vec4> ssaoKernel(SSAO_KERNEL_SIZE);
|
|
for (uint32_t i = 0; i < SSAO_KERNEL_SIZE; ++i)
|
|
{
|
|
glm::vec3 sample(rndDist(rndEngine) * 2.0 - 1.0, rndDist(rndEngine) * 2.0 - 1.0, rndDist(rndEngine));
|
|
sample = glm::normalize(sample);
|
|
sample *= rndDist(rndEngine);
|
|
float scale = float(i) / float(SSAO_KERNEL_SIZE);
|
|
scale = lerp(0.1f, 1.0f, scale * scale);
|
|
ssaoKernel[i] = glm::vec4(sample * scale, 0.0f);
|
|
}
|
|
|
|
// Upload as UBO
|
|
vulkanDevice->createBuffer(
|
|
VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
|
|
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
|
|
&uniformBuffers.ssaoKernel,
|
|
ssaoKernel.size() * sizeof(glm::vec4),
|
|
ssaoKernel.data());
|
|
|
|
// Random noise
|
|
std::vector<glm::vec4> ssaoNoise(SSAO_NOISE_DIM * SSAO_NOISE_DIM);
|
|
for (uint32_t i = 0; i < static_cast<uint32_t>(ssaoNoise.size()); i++)
|
|
{
|
|
ssaoNoise[i] = glm::vec4(rndDist(rndEngine) * 2.0f - 1.0f, rndDist(rndEngine) * 2.0f - 1.0f, 0.0f, 0.0f);
|
|
}
|
|
// Upload as texture
|
|
textures.ssaoNoise.fromBuffer(ssaoNoise.data(), ssaoNoise.size() * sizeof(glm::vec4), VK_FORMAT_R32G32B32A32_SFLOAT, SSAO_NOISE_DIM, SSAO_NOISE_DIM, vulkanDevice, queue, VK_FILTER_NEAREST);
|
|
}
|
|
|
|
void updateUniformBufferMatrices()
|
|
{
|
|
uboSceneParams.projection = camera.matrices.perspective;
|
|
uboSceneParams.view = camera.matrices.view;
|
|
uboSceneParams.model = glm::mat4(1.0f);
|
|
|
|
VK_CHECK_RESULT(uniformBuffers.sceneParams.map());
|
|
uniformBuffers.sceneParams.copyTo(&uboSceneParams, sizeof(uboSceneParams));
|
|
uniformBuffers.sceneParams.unmap();
|
|
}
|
|
|
|
void updateUniformBufferSSAOParams()
|
|
{
|
|
uboSSAOParams.projection = camera.matrices.perspective;
|
|
|
|
VK_CHECK_RESULT(uniformBuffers.ssaoParams.map());
|
|
uniformBuffers.ssaoParams.copyTo(&uboSSAOParams, sizeof(uboSSAOParams));
|
|
uniformBuffers.ssaoParams.unmap();
|
|
}
|
|
|
|
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();
|
|
prepareOffscreenFramebuffers();
|
|
prepareUniformBuffers();
|
|
setupDescriptorPool();
|
|
setupLayoutsAndDescriptors();
|
|
preparePipelines();
|
|
buildCommandBuffers();
|
|
prepared = true;
|
|
}
|
|
|
|
virtual void render()
|
|
{
|
|
if (!prepared) {
|
|
return;
|
|
}
|
|
draw();
|
|
if (camera.updated) {
|
|
updateUniformBufferMatrices();
|
|
updateUniformBufferSSAOParams();
|
|
}
|
|
}
|
|
|
|
virtual void viewChanged()
|
|
{
|
|
updateUniformBufferMatrices();
|
|
updateUniformBufferSSAOParams();
|
|
}
|
|
|
|
virtual void OnUpdateUIOverlay(vks::UIOverlay *overlay)
|
|
{
|
|
if (overlay->header("Settings")) {
|
|
if (overlay->checkBox("Enable SSAO", &uboSSAOParams.ssao)) {
|
|
updateUniformBufferSSAOParams();
|
|
}
|
|
if (overlay->checkBox("SSAO blur", &uboSSAOParams.ssaoBlur)) {
|
|
updateUniformBufferSSAOParams();
|
|
}
|
|
if (overlay->checkBox("SSAO pass only", &uboSSAOParams.ssaoOnly)) {
|
|
updateUniformBufferSSAOParams();
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
VULKAN_EXAMPLE_MAIN()
|