1447 lines
64 KiB
C++
1447 lines
64 KiB
C++
/* Copyright (c) 2014-2018, NVIDIA CORPORATION. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of NVIDIA CORPORATION nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sstream>
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#include <vulkan/vulkan.hpp>
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extern std::vector<std::string> defaultSearchPaths;
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#define STB_IMAGE_IMPLEMENTATION
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#include "fileformats/stb_image.h"
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#include "obj_loader.h"
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#include "hello_vulkan.h"
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#include "nvh/alignment.hpp"
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#include "nvh/cameramanipulator.hpp"
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#include "nvh/fileoperations.hpp"
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#include "nvvk/commands_vk.hpp"
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#include "nvvk/descriptorsets_vk.hpp"
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#include "nvvk/pipeline_vk.hpp"
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#include "nvvk/renderpasses_vk.hpp"
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#include "nvvk/shaders_vk.hpp"
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// Holding the camera matrices
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struct CameraMatrices
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{
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nvmath::mat4f view;
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nvmath::mat4f proj;
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nvmath::mat4f viewInverse;
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// #VKRay
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nvmath::mat4f projInverse;
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};
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//--------------------------------------------------------------------------------------------------
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// Keep the handle on the device
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// Initialize the tool to do all our allocations: buffers, images
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//
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void HelloVulkan::setup(const vk::Instance& instance,
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const vk::Device& device,
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const vk::PhysicalDevice& physicalDevice,
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uint32_t queueFamily)
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{
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AppBase::setup(instance, device, physicalDevice, queueFamily);
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m_alloc.init(device, physicalDevice);
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m_debug.setup(m_device);
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m_offscreenDepthFormat = nvvk::findDepthFormat(physicalDevice);
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}
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//--------------------------------------------------------------------------------------------------
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// Called at each frame to update the camera matrix
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//
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void HelloVulkan::updateUniformBuffer(const vk::CommandBuffer& cmdBuf)
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{
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// Prepare new UBO contents on host.
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const float aspectRatio = m_size.width / static_cast<float>(m_size.height);
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CameraMatrices hostUBO = {};
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hostUBO.view = CameraManip.getMatrix();
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hostUBO.proj = nvmath::perspectiveVK(CameraManip.getFov(), aspectRatio, 0.1f, 1000.0f);
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// hostUBO.proj[1][1] *= -1; // Inverting Y for Vulkan (not needed with perspectiveVK).
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hostUBO.viewInverse = nvmath::invert(hostUBO.view);
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// #VKRay
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hostUBO.projInverse = nvmath::invert(hostUBO.proj);
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// UBO on the device, and what stages access it.
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vk::Buffer deviceUBO = m_cameraMat.buffer;
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auto uboUsageStages =
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vk::PipelineStageFlagBits::eVertexShader | vk::PipelineStageFlagBits::eRayTracingShaderKHR;
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// Ensure that the modified UBO is not visible to previous frames.
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vk::BufferMemoryBarrier beforeBarrier;
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beforeBarrier.setSrcAccessMask(vk::AccessFlagBits::eShaderRead);
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beforeBarrier.setDstAccessMask(vk::AccessFlagBits::eTransferWrite);
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beforeBarrier.setBuffer(deviceUBO);
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beforeBarrier.setOffset(0);
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beforeBarrier.setSize(sizeof hostUBO);
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cmdBuf.pipelineBarrier(uboUsageStages, vk::PipelineStageFlagBits::eTransfer,
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vk::DependencyFlagBits::eDeviceGroup, {}, {beforeBarrier}, {});
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// Schedule the host-to-device upload. (hostUBO is copied into the cmd
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// buffer so it is okay to deallocate when the function returns).
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cmdBuf.updateBuffer<CameraMatrices>(m_cameraMat.buffer, 0, hostUBO);
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// Making sure the updated UBO will be visible.
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vk::BufferMemoryBarrier afterBarrier;
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afterBarrier.setSrcAccessMask(vk::AccessFlagBits::eTransferWrite);
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afterBarrier.setDstAccessMask(vk::AccessFlagBits::eShaderRead);
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afterBarrier.setBuffer(deviceUBO);
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afterBarrier.setOffset(0);
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afterBarrier.setSize(sizeof hostUBO);
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cmdBuf.pipelineBarrier(vk::PipelineStageFlagBits::eTransfer, uboUsageStages,
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vk::DependencyFlagBits::eDeviceGroup, {}, {afterBarrier}, {});
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}
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//--------------------------------------------------------------------------------------------------
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// Describing the layout pushed when rendering
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//
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void HelloVulkan::createDescriptorSetLayout()
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{
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using vkDS = vk::DescriptorSetLayoutBinding;
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using vkDT = vk::DescriptorType;
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using vkSS = vk::ShaderStageFlagBits;
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uint32_t nbTxt = static_cast<uint32_t>(m_textures.size());
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uint32_t nbObj = static_cast<uint32_t>(m_objModel.size());
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// Camera matrices (binding = 0)
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m_descSetLayoutBind.addBinding(
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vkDS(0, vkDT::eUniformBuffer, 1, vkSS::eVertex | vkSS::eRaygenKHR));
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// Materials (binding = 1)
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m_descSetLayoutBind.addBinding(
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vkDS(1, vkDT::eStorageBuffer, nbObj, vkSS::eVertex | vkSS::eFragment | vkSS::eClosestHitKHR));
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// Scene description (binding = 2)
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m_descSetLayoutBind.addBinding( //
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vkDS(2, vkDT::eStorageBuffer, 1, vkSS::eVertex | vkSS::eFragment | vkSS::eClosestHitKHR));
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// Textures (binding = 3)
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m_descSetLayoutBind.addBinding(
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vkDS(3, vkDT::eCombinedImageSampler, nbTxt, vkSS::eFragment | vkSS::eClosestHitKHR));
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// Materials (binding = 4)
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m_descSetLayoutBind.addBinding(
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vkDS(4, vkDT::eStorageBuffer, nbObj, vkSS::eFragment | vkSS::eClosestHitKHR));
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// Storing vertices (binding = 5)
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m_descSetLayoutBind.addBinding( //
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vkDS(5, vkDT::eStorageBuffer, nbObj, vkSS::eClosestHitKHR));
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// Storing indices (binding = 6)
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m_descSetLayoutBind.addBinding( //
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vkDS(6, vkDT::eStorageBuffer, nbObj, vkSS::eClosestHitKHR));
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m_descSetLayout = m_descSetLayoutBind.createLayout(m_device);
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m_descPool = m_descSetLayoutBind.createPool(m_device, 1);
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m_descSet = nvvk::allocateDescriptorSet(m_device, m_descPool, m_descSetLayout);
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}
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//--------------------------------------------------------------------------------------------------
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// Setting up the buffers in the descriptor set
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//
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void HelloVulkan::updateDescriptorSet()
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{
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std::vector<vk::WriteDescriptorSet> writes;
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// Camera matrices and scene description
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vk::DescriptorBufferInfo dbiUnif{m_cameraMat.buffer, 0, VK_WHOLE_SIZE};
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writes.emplace_back(m_descSetLayoutBind.makeWrite(m_descSet, 0, &dbiUnif));
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vk::DescriptorBufferInfo dbiSceneDesc{m_sceneDesc.buffer, 0, VK_WHOLE_SIZE};
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writes.emplace_back(m_descSetLayoutBind.makeWrite(m_descSet, 2, &dbiSceneDesc));
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// All material buffers, 1 buffer per OBJ
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std::vector<vk::DescriptorBufferInfo> dbiMat;
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std::vector<vk::DescriptorBufferInfo> dbiMatIdx;
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std::vector<vk::DescriptorBufferInfo> dbiVert;
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std::vector<vk::DescriptorBufferInfo> dbiIdx;
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for(auto& obj : m_objModel)
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{
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dbiMat.emplace_back(obj.matColorBuffer.buffer, 0, VK_WHOLE_SIZE);
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dbiMatIdx.emplace_back(obj.matIndexBuffer.buffer, 0, VK_WHOLE_SIZE);
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dbiVert.emplace_back(obj.vertexBuffer.buffer, 0, VK_WHOLE_SIZE);
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dbiIdx.emplace_back(obj.indexBuffer.buffer, 0, VK_WHOLE_SIZE);
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}
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writes.emplace_back(m_descSetLayoutBind.makeWriteArray(m_descSet, 1, dbiMat.data()));
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writes.emplace_back(m_descSetLayoutBind.makeWriteArray(m_descSet, 4, dbiMatIdx.data()));
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writes.emplace_back(m_descSetLayoutBind.makeWriteArray(m_descSet, 5, dbiVert.data()));
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writes.emplace_back(m_descSetLayoutBind.makeWriteArray(m_descSet, 6, dbiIdx.data()));
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// All texture samplers
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std::vector<vk::DescriptorImageInfo> diit;
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for(auto& texture : m_textures)
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{
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diit.emplace_back(texture.descriptor);
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}
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writes.emplace_back(m_descSetLayoutBind.makeWriteArray(m_descSet, 3, diit.data()));
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// Writing the information
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m_device.updateDescriptorSets(static_cast<uint32_t>(writes.size()), writes.data(), 0, nullptr);
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}
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//--------------------------------------------------------------------------------------------------
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// Creating the pipeline layout
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//
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void HelloVulkan::createGraphicsPipeline()
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{
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using vkSS = vk::ShaderStageFlagBits;
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vk::PushConstantRange pushConstantRanges = {vkSS::eVertex | vkSS::eFragment, 0,
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sizeof(ObjPushConstant)};
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// Creating the Pipeline Layout
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vk::PipelineLayoutCreateInfo pipelineLayoutCreateInfo;
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vk::DescriptorSetLayout descSetLayout(m_descSetLayout);
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pipelineLayoutCreateInfo.setSetLayoutCount(1);
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pipelineLayoutCreateInfo.setPSetLayouts(&descSetLayout);
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pipelineLayoutCreateInfo.setPushConstantRangeCount(1);
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pipelineLayoutCreateInfo.setPPushConstantRanges(&pushConstantRanges);
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m_pipelineLayout = m_device.createPipelineLayout(pipelineLayoutCreateInfo);
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// Creating the Pipeline
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std::vector<std::string> paths = defaultSearchPaths;
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nvvk::GraphicsPipelineGeneratorCombined gpb(m_device, m_pipelineLayout, m_offscreenRenderPass);
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gpb.depthStencilState.depthTestEnable = true;
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gpb.addShader(nvh::loadFile("spv/vert_shader.vert.spv", true, paths, true), vkSS::eVertex);
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gpb.addShader(nvh::loadFile("spv/frag_shader.frag.spv", true, paths, true), vkSS::eFragment);
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gpb.addBindingDescription({0, sizeof(VertexObj)});
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gpb.addAttributeDescriptions(std::vector<vk::VertexInputAttributeDescription>{
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{0, 0, vk::Format::eR32G32B32Sfloat, offsetof(VertexObj, pos)},
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{1, 0, vk::Format::eR32G32B32Sfloat, offsetof(VertexObj, nrm)},
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{2, 0, vk::Format::eR32G32B32Sfloat, offsetof(VertexObj, color)},
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{3, 0, vk::Format::eR32G32Sfloat, offsetof(VertexObj, texCoord)}});
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m_graphicsPipeline = gpb.createPipeline();
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m_debug.setObjectName(m_graphicsPipeline, "Graphics");
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}
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//--------------------------------------------------------------------------------------------------
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// Loading the OBJ file and setting up all buffers
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//
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void HelloVulkan::loadModel(const std::string& filename, nvmath::mat4f transform)
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{
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using vkBU = vk::BufferUsageFlagBits;
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LOGI("Loading File: %s \n", filename.c_str());
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ObjLoader loader;
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loader.loadModel(filename);
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// Converting from Srgb to linear
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for(auto& m : loader.m_materials)
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{
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m.ambient = nvmath::pow(m.ambient, 2.2f);
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m.diffuse = nvmath::pow(m.diffuse, 2.2f);
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m.specular = nvmath::pow(m.specular, 2.2f);
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}
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ObjInstance instance;
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instance.objIndex = static_cast<uint32_t>(m_objModel.size());
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instance.transform = transform;
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instance.transformIT = nvmath::transpose(nvmath::invert(transform));
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instance.txtOffset = static_cast<uint32_t>(m_textures.size());
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ObjModel model;
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model.nbIndices = static_cast<uint32_t>(loader.m_indices.size());
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model.nbVertices = static_cast<uint32_t>(loader.m_vertices.size());
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// Create the buffers on Device and copy vertices, indices and materials
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nvvk::CommandPool cmdBufGet(m_device, m_graphicsQueueIndex);
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vk::CommandBuffer cmdBuf = cmdBufGet.createCommandBuffer();
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model.vertexBuffer =
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m_alloc.createBuffer(cmdBuf, loader.m_vertices,
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vkBU::eVertexBuffer | vkBU::eStorageBuffer | vkBU::eShaderDeviceAddress
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| vkBU::eAccelerationStructureBuildInputReadOnlyKHR);
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model.indexBuffer =
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m_alloc.createBuffer(cmdBuf, loader.m_indices,
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vkBU::eIndexBuffer | vkBU::eStorageBuffer | vkBU::eShaderDeviceAddress
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| vkBU::eAccelerationStructureBuildInputReadOnlyKHR);
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model.matColorBuffer = m_alloc.createBuffer(cmdBuf, loader.m_materials, vkBU::eStorageBuffer);
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model.matIndexBuffer = m_alloc.createBuffer(cmdBuf, loader.m_matIndx, vkBU::eStorageBuffer);
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// Creates all textures found
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createTextureImages(cmdBuf, loader.m_textures);
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cmdBufGet.submitAndWait(cmdBuf);
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m_alloc.finalizeAndReleaseStaging();
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std::string objNb = std::to_string(instance.objIndex);
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m_debug.setObjectName(model.vertexBuffer.buffer, (std::string("vertex_" + objNb).c_str()));
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m_debug.setObjectName(model.indexBuffer.buffer, (std::string("index_" + objNb).c_str()));
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m_debug.setObjectName(model.matColorBuffer.buffer, (std::string("mat_" + objNb).c_str()));
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m_debug.setObjectName(model.matIndexBuffer.buffer, (std::string("matIdx_" + objNb).c_str()));
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m_objModel.emplace_back(model);
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m_objInstance.emplace_back(instance);
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}
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// Add a light-emitting colored lantern to the scene. May only be called before TLAS build.
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void HelloVulkan::addLantern(nvmath::vec3f pos, nvmath::vec3f color, float brightness, float radius)
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{
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assert(m_lanternCount == 0); // Indicates TLAS build has not happened yet.
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m_lanterns.push_back({pos, color, brightness, radius});
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}
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//--------------------------------------------------------------------------------------------------
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// Creating the uniform buffer holding the camera matrices
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// - Buffer is host visible
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//
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void HelloVulkan::createUniformBuffer()
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{
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using vkBU = vk::BufferUsageFlagBits;
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using vkMP = vk::MemoryPropertyFlagBits;
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m_cameraMat = m_alloc.createBuffer(sizeof(CameraMatrices),
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vkBU::eUniformBuffer | vkBU::eTransferDst, vkMP::eDeviceLocal);
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m_debug.setObjectName(m_cameraMat.buffer, "cameraMat");
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}
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//--------------------------------------------------------------------------------------------------
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// Create a storage buffer containing the description of the scene elements
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// - Which geometry is used by which instance
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// - Transformation
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// - Offset for texture
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//
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void HelloVulkan::createSceneDescriptionBuffer()
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{
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using vkBU = vk::BufferUsageFlagBits;
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nvvk::CommandPool cmdGen(m_device, m_graphicsQueueIndex);
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auto cmdBuf = cmdGen.createCommandBuffer();
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m_sceneDesc = m_alloc.createBuffer(cmdBuf, m_objInstance, vkBU::eStorageBuffer);
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cmdGen.submitAndWait(cmdBuf);
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m_alloc.finalizeAndReleaseStaging();
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m_debug.setObjectName(m_sceneDesc.buffer, "sceneDesc");
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}
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//--------------------------------------------------------------------------------------------------
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// Creating all textures and samplers
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//
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void HelloVulkan::createTextureImages(const vk::CommandBuffer& cmdBuf,
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const std::vector<std::string>& textures)
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{
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using vkIU = vk::ImageUsageFlagBits;
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vk::SamplerCreateInfo samplerCreateInfo{
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{}, vk::Filter::eLinear, vk::Filter::eLinear, vk::SamplerMipmapMode::eLinear};
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samplerCreateInfo.setMaxLod(FLT_MAX);
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vk::Format format = vk::Format::eR8G8B8A8Srgb;
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// If no textures are present, create a dummy one to accommodate the pipeline layout
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if(textures.empty() && m_textures.empty())
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{
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nvvk::Texture texture;
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std::array<uint8_t, 4> color{255u, 255u, 255u, 255u};
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vk::DeviceSize bufferSize = sizeof(color);
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auto imgSize = vk::Extent2D(1, 1);
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auto imageCreateInfo = nvvk::makeImage2DCreateInfo(imgSize, format);
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// Creating the dummy texture
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nvvk::Image image = m_alloc.createImage(cmdBuf, bufferSize, color.data(), imageCreateInfo);
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vk::ImageViewCreateInfo ivInfo = nvvk::makeImageViewCreateInfo(image.image, imageCreateInfo);
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texture = m_alloc.createTexture(image, ivInfo, samplerCreateInfo);
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// The image format must be in VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL
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nvvk::cmdBarrierImageLayout(cmdBuf, texture.image, vk::ImageLayout::eUndefined,
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vk::ImageLayout::eShaderReadOnlyOptimal);
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m_textures.push_back(texture);
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}
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else
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{
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// Uploading all images
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for(const auto& texture : textures)
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{
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std::stringstream o;
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int texWidth, texHeight, texChannels;
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o << "media/textures/" << texture;
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std::string txtFile = nvh::findFile(o.str(), defaultSearchPaths, true);
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stbi_uc* stbi_pixels =
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stbi_load(txtFile.c_str(), &texWidth, &texHeight, &texChannels, STBI_rgb_alpha);
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std::array<stbi_uc, 4> color{255u, 0u, 255u, 255u};
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stbi_uc* pixels = stbi_pixels;
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// Handle failure
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if(!stbi_pixels)
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{
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texWidth = texHeight = 1;
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texChannels = 4;
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pixels = reinterpret_cast<stbi_uc*>(color.data());
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}
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vk::DeviceSize bufferSize = static_cast<uint64_t>(texWidth) * texHeight * sizeof(uint8_t) * 4;
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auto imgSize = vk::Extent2D(texWidth, texHeight);
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auto imageCreateInfo = nvvk::makeImage2DCreateInfo(imgSize, format, vkIU::eSampled, true);
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{
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nvvk::ImageDedicated image =
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m_alloc.createImage(cmdBuf, bufferSize, pixels, imageCreateInfo);
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nvvk::cmdGenerateMipmaps(cmdBuf, image.image, format, imgSize, imageCreateInfo.mipLevels);
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vk::ImageViewCreateInfo ivInfo =
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nvvk::makeImageViewCreateInfo(image.image, imageCreateInfo);
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nvvk::Texture texture = m_alloc.createTexture(image, ivInfo, samplerCreateInfo);
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m_textures.push_back(texture);
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}
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stbi_image_free(stbi_pixels);
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}
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}
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}
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//--------------------------------------------------------------------------------------------------
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// Destroying all allocations
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//
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void HelloVulkan::destroyResources()
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{
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m_device.destroy(m_graphicsPipeline);
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m_device.destroy(m_pipelineLayout);
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m_device.destroy(m_descPool);
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m_device.destroy(m_descSetLayout);
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m_alloc.destroy(m_cameraMat);
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m_alloc.destroy(m_sceneDesc);
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|
|
for(auto& m : m_objModel)
|
|
{
|
|
m_alloc.destroy(m.vertexBuffer);
|
|
m_alloc.destroy(m.indexBuffer);
|
|
m_alloc.destroy(m.matColorBuffer);
|
|
m_alloc.destroy(m.matIndexBuffer);
|
|
}
|
|
|
|
for(auto& t : m_textures)
|
|
{
|
|
m_alloc.destroy(t);
|
|
}
|
|
|
|
//#Post
|
|
m_device.destroy(m_postPipeline);
|
|
m_device.destroy(m_postPipelineLayout);
|
|
m_device.destroy(m_postDescPool);
|
|
m_device.destroy(m_postDescSetLayout);
|
|
m_alloc.destroy(m_offscreenColor);
|
|
m_alloc.destroy(m_offscreenDepth);
|
|
m_device.destroy(m_offscreenRenderPass);
|
|
m_device.destroy(m_offscreenFramebuffer);
|
|
|
|
// #VKRay
|
|
m_rtBuilder.destroy();
|
|
m_device.destroy(m_rtDescPool);
|
|
m_device.destroy(m_rtDescSetLayout);
|
|
m_device.destroy(m_rtPipeline);
|
|
m_device.destroy(m_rtPipelineLayout);
|
|
m_alloc.destroy(m_rtSBTBuffer);
|
|
|
|
m_device.destroy(m_lanternIndirectDescPool);
|
|
m_device.destroy(m_lanternIndirectDescSetLayout);
|
|
m_device.destroy(m_lanternIndirectCompPipeline);
|
|
m_device.destroy(m_lanternIndirectCompPipelineLayout);
|
|
m_alloc.destroy(m_lanternIndirectBuffer);
|
|
m_alloc.destroy(m_lanternVertexBuffer);
|
|
m_alloc.destroy(m_lanternIndexBuffer);
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// Drawing the scene in raster mode
|
|
//
|
|
void HelloVulkan::rasterize(const vk::CommandBuffer& cmdBuf)
|
|
{
|
|
using vkPBP = vk::PipelineBindPoint;
|
|
using vkSS = vk::ShaderStageFlagBits;
|
|
vk::DeviceSize offset{0};
|
|
|
|
m_debug.beginLabel(cmdBuf, "Rasterize");
|
|
|
|
// Dynamic Viewport
|
|
cmdBuf.setViewport(0, {vk::Viewport(0, 0, (float)m_size.width, (float)m_size.height, 0, 1)});
|
|
cmdBuf.setScissor(0, {{{0, 0}, {m_size.width, m_size.height}}});
|
|
|
|
// Drawing all triangles
|
|
cmdBuf.bindPipeline(vkPBP::eGraphics, m_graphicsPipeline);
|
|
cmdBuf.bindDescriptorSets(vkPBP::eGraphics, m_pipelineLayout, 0, {m_descSet}, {});
|
|
for(int i = 0; i < m_objInstance.size(); ++i)
|
|
{
|
|
auto& inst = m_objInstance[i];
|
|
auto& model = m_objModel[inst.objIndex];
|
|
m_pushConstant.instanceId = i; // Telling which instance is drawn
|
|
cmdBuf.pushConstants<ObjPushConstant>(m_pipelineLayout, vkSS::eVertex | vkSS::eFragment, 0,
|
|
m_pushConstant);
|
|
|
|
cmdBuf.bindVertexBuffers(0, {model.vertexBuffer.buffer}, {offset});
|
|
cmdBuf.bindIndexBuffer(model.indexBuffer.buffer, 0, vk::IndexType::eUint32);
|
|
cmdBuf.drawIndexed(model.nbIndices, 1, 0, 0, 0);
|
|
}
|
|
m_debug.endLabel(cmdBuf);
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// Handling resize of the window
|
|
//
|
|
void HelloVulkan::onResize(int /*w*/, int /*h*/)
|
|
{
|
|
createOffscreenRender();
|
|
updatePostDescriptorSet();
|
|
updateRtDescriptorSet();
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
// Post-processing
|
|
//////////////////////////////////////////////////////////////////////////
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// Creating an offscreen frame buffer and the associated render pass
|
|
//
|
|
void HelloVulkan::createOffscreenRender()
|
|
{
|
|
m_alloc.destroy(m_offscreenColor);
|
|
m_alloc.destroy(m_offscreenDepth);
|
|
|
|
// Creating the color image
|
|
{
|
|
auto colorCreateInfo = nvvk::makeImage2DCreateInfo(m_size, m_offscreenColorFormat,
|
|
vk::ImageUsageFlagBits::eColorAttachment
|
|
| vk::ImageUsageFlagBits::eSampled
|
|
| vk::ImageUsageFlagBits::eStorage);
|
|
|
|
|
|
nvvk::Image image = m_alloc.createImage(colorCreateInfo);
|
|
vk::ImageViewCreateInfo ivInfo = nvvk::makeImageViewCreateInfo(image.image, colorCreateInfo);
|
|
m_offscreenColor = m_alloc.createTexture(image, ivInfo, vk::SamplerCreateInfo());
|
|
m_offscreenColor.descriptor.imageLayout = VK_IMAGE_LAYOUT_GENERAL;
|
|
}
|
|
|
|
// Creating the depth buffer
|
|
auto depthCreateInfo =
|
|
nvvk::makeImage2DCreateInfo(m_size, m_offscreenDepthFormat,
|
|
vk::ImageUsageFlagBits::eDepthStencilAttachment);
|
|
{
|
|
nvvk::Image image = m_alloc.createImage(depthCreateInfo);
|
|
|
|
vk::ImageViewCreateInfo depthStencilView;
|
|
depthStencilView.setViewType(vk::ImageViewType::e2D);
|
|
depthStencilView.setFormat(m_offscreenDepthFormat);
|
|
depthStencilView.setSubresourceRange({vk::ImageAspectFlagBits::eDepth, 0, 1, 0, 1});
|
|
depthStencilView.setImage(image.image);
|
|
|
|
m_offscreenDepth = m_alloc.createTexture(image, depthStencilView);
|
|
}
|
|
|
|
// Setting the image layout for both color and depth
|
|
{
|
|
nvvk::CommandPool genCmdBuf(m_device, m_graphicsQueueIndex);
|
|
auto cmdBuf = genCmdBuf.createCommandBuffer();
|
|
nvvk::cmdBarrierImageLayout(cmdBuf, m_offscreenColor.image, vk::ImageLayout::eUndefined,
|
|
vk::ImageLayout::eGeneral);
|
|
nvvk::cmdBarrierImageLayout(cmdBuf, m_offscreenDepth.image, vk::ImageLayout::eUndefined,
|
|
vk::ImageLayout::eDepthStencilAttachmentOptimal,
|
|
vk::ImageAspectFlagBits::eDepth);
|
|
|
|
genCmdBuf.submitAndWait(cmdBuf);
|
|
}
|
|
|
|
// Creating a renderpass for the offscreen
|
|
if(!m_offscreenRenderPass)
|
|
{
|
|
m_offscreenRenderPass =
|
|
nvvk::createRenderPass(m_device, {m_offscreenColorFormat}, m_offscreenDepthFormat, 1, true,
|
|
true, vk::ImageLayout::eGeneral, vk::ImageLayout::eGeneral);
|
|
}
|
|
|
|
// Creating the frame buffer for offscreen
|
|
std::vector<vk::ImageView> attachments = {m_offscreenColor.descriptor.imageView,
|
|
m_offscreenDepth.descriptor.imageView};
|
|
|
|
m_device.destroy(m_offscreenFramebuffer);
|
|
vk::FramebufferCreateInfo info;
|
|
info.setRenderPass(m_offscreenRenderPass);
|
|
info.setAttachmentCount(2);
|
|
info.setPAttachments(attachments.data());
|
|
info.setWidth(m_size.width);
|
|
info.setHeight(m_size.height);
|
|
info.setLayers(1);
|
|
m_offscreenFramebuffer = m_device.createFramebuffer(info);
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// The pipeline is how things are rendered, which shaders, type of primitives, depth test and more
|
|
//
|
|
void HelloVulkan::createPostPipeline()
|
|
{
|
|
// Push constants in the fragment shader
|
|
vk::PushConstantRange pushConstantRanges = {vk::ShaderStageFlagBits::eFragment, 0, sizeof(float)};
|
|
|
|
// Creating the pipeline layout
|
|
vk::PipelineLayoutCreateInfo pipelineLayoutCreateInfo;
|
|
pipelineLayoutCreateInfo.setSetLayoutCount(1);
|
|
pipelineLayoutCreateInfo.setPSetLayouts(&m_postDescSetLayout);
|
|
pipelineLayoutCreateInfo.setPushConstantRangeCount(1);
|
|
pipelineLayoutCreateInfo.setPPushConstantRanges(&pushConstantRanges);
|
|
m_postPipelineLayout = m_device.createPipelineLayout(pipelineLayoutCreateInfo);
|
|
|
|
// Pipeline: completely generic, no vertices
|
|
nvvk::GraphicsPipelineGeneratorCombined pipelineGenerator(m_device, m_postPipelineLayout,
|
|
m_renderPass);
|
|
pipelineGenerator.addShader(nvh::loadFile("spv/passthrough.vert.spv", true, defaultSearchPaths,
|
|
true),
|
|
vk::ShaderStageFlagBits::eVertex);
|
|
pipelineGenerator.addShader(nvh::loadFile("spv/post.frag.spv", true, defaultSearchPaths, true),
|
|
vk::ShaderStageFlagBits::eFragment);
|
|
pipelineGenerator.rasterizationState.setCullMode(vk::CullModeFlagBits::eNone);
|
|
m_postPipeline = pipelineGenerator.createPipeline();
|
|
m_debug.setObjectName(m_postPipeline, "post");
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// The descriptor layout is the description of the data that is passed to the vertex or the
|
|
// fragment program.
|
|
//
|
|
void HelloVulkan::createPostDescriptor()
|
|
{
|
|
using vkDS = vk::DescriptorSetLayoutBinding;
|
|
using vkDT = vk::DescriptorType;
|
|
using vkSS = vk::ShaderStageFlagBits;
|
|
|
|
m_postDescSetLayoutBind.addBinding(vkDS(0, vkDT::eCombinedImageSampler, 1, vkSS::eFragment));
|
|
m_postDescSetLayout = m_postDescSetLayoutBind.createLayout(m_device);
|
|
m_postDescPool = m_postDescSetLayoutBind.createPool(m_device);
|
|
m_postDescSet = nvvk::allocateDescriptorSet(m_device, m_postDescPool, m_postDescSetLayout);
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// Update the output
|
|
//
|
|
void HelloVulkan::updatePostDescriptorSet()
|
|
{
|
|
vk::WriteDescriptorSet writeDescriptorSets =
|
|
m_postDescSetLayoutBind.makeWrite(m_postDescSet, 0, &m_offscreenColor.descriptor);
|
|
m_device.updateDescriptorSets(writeDescriptorSets, nullptr);
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// Draw a full screen quad with the attached image
|
|
//
|
|
void HelloVulkan::drawPost(vk::CommandBuffer cmdBuf)
|
|
{
|
|
m_debug.beginLabel(cmdBuf, "Post");
|
|
|
|
cmdBuf.setViewport(0, {vk::Viewport(0, 0, (float)m_size.width, (float)m_size.height, 0, 1)});
|
|
cmdBuf.setScissor(0, {{{0, 0}, {m_size.width, m_size.height}}});
|
|
|
|
auto aspectRatio = static_cast<float>(m_size.width) / static_cast<float>(m_size.height);
|
|
cmdBuf.pushConstants<float>(m_postPipelineLayout, vk::ShaderStageFlagBits::eFragment, 0,
|
|
aspectRatio);
|
|
cmdBuf.bindPipeline(vk::PipelineBindPoint::eGraphics, m_postPipeline);
|
|
cmdBuf.bindDescriptorSets(vk::PipelineBindPoint::eGraphics, m_postPipelineLayout, 0,
|
|
m_postDescSet, {});
|
|
cmdBuf.draw(3, 1, 0, 0);
|
|
|
|
m_debug.endLabel(cmdBuf);
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
//////////////////////////////////////////////////////////////////////////
|
|
//////////////////////////////////////////////////////////////////////////
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// Initialize Vulkan ray tracing
|
|
// #VKRay
|
|
void HelloVulkan::initRayTracing()
|
|
{
|
|
// Requesting ray tracing properties
|
|
auto properties =
|
|
m_physicalDevice.getProperties2<vk::PhysicalDeviceProperties2,
|
|
vk::PhysicalDeviceRayTracingPipelinePropertiesKHR>();
|
|
m_rtProperties = properties.get<vk::PhysicalDeviceRayTracingPipelinePropertiesKHR>();
|
|
m_rtBuilder.setup(m_device, &m_alloc, m_graphicsQueueIndex);
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// Convert an OBJ model into the ray tracing geometry used to build the BLAS
|
|
//
|
|
nvvk::RaytracingBuilderKHR::BlasInput HelloVulkan::objectToVkGeometryKHR(const ObjModel& model)
|
|
{
|
|
// BLAS builder requires raw device addresses.
|
|
vk::DeviceAddress vertexAddress = m_device.getBufferAddress({model.vertexBuffer.buffer});
|
|
vk::DeviceAddress indexAddress = m_device.getBufferAddress({model.indexBuffer.buffer});
|
|
|
|
uint32_t maxPrimitiveCount = model.nbIndices / 3;
|
|
|
|
// Describe buffer as array of VertexObj.
|
|
vk::AccelerationStructureGeometryTrianglesDataKHR triangles;
|
|
triangles.setVertexFormat(vk::Format::eR32G32B32Sfloat); // vec3 vertex position data.
|
|
triangles.setVertexData(vertexAddress);
|
|
triangles.setVertexStride(sizeof(VertexObj));
|
|
// Describe index data (32-bit unsigned int)
|
|
triangles.setIndexType(vk::IndexType::eUint32);
|
|
triangles.setIndexData(indexAddress);
|
|
// Indicate identity transform by setting transformData to null device pointer.
|
|
triangles.setTransformData({});
|
|
triangles.setMaxVertex(model.nbVertices);
|
|
|
|
// Identify the above data as containing opaque triangles.
|
|
vk::AccelerationStructureGeometryKHR asGeom;
|
|
asGeom.setGeometryType(vk::GeometryTypeKHR::eTriangles);
|
|
asGeom.setFlags(vk::GeometryFlagBitsKHR::eOpaque);
|
|
asGeom.geometry.setTriangles(triangles);
|
|
|
|
// The entire array will be used to build the BLAS.
|
|
vk::AccelerationStructureBuildRangeInfoKHR offset;
|
|
offset.setFirstVertex(0);
|
|
offset.setPrimitiveCount(maxPrimitiveCount);
|
|
offset.setPrimitiveOffset(0);
|
|
offset.setTransformOffset(0);
|
|
|
|
// Our blas is made from only one geometry, but could be made of many geometries
|
|
nvvk::RaytracingBuilderKHR::BlasInput input;
|
|
input.asGeometry.emplace_back(asGeom);
|
|
input.asBuildOffsetInfo.emplace_back(offset);
|
|
|
|
return input;
|
|
}
|
|
|
|
// Tesselate a sphere as a list of triangles; return its
|
|
// vertices and indices as reference arguments.
|
|
void HelloVulkan::fillLanternVerts(std::vector<nvmath::vec3f>& vertices,
|
|
std::vector<uint32_t>& indices)
|
|
{
|
|
// Create a spherical lantern model by recursively tesselating an octahedron.
|
|
struct VertexIndex
|
|
{
|
|
nvmath::vec3f vertex;
|
|
uint32_t index; // Keep track of this vert's _eventual_ index in vertices.
|
|
};
|
|
struct Triangle
|
|
{
|
|
VertexIndex vert0, vert1, vert2;
|
|
};
|
|
|
|
VertexIndex posX{{m_lanternModelRadius, 0, 0}, 0};
|
|
VertexIndex negX{{-m_lanternModelRadius, 0, 0}, 1};
|
|
VertexIndex posY{{0, m_lanternModelRadius, 0}, 2};
|
|
VertexIndex negY{{0, -m_lanternModelRadius, 0}, 3};
|
|
VertexIndex posZ{{0, 0, m_lanternModelRadius}, 4};
|
|
VertexIndex negZ{{0, 0, -m_lanternModelRadius}, 5};
|
|
uint32_t vertexCount = 6;
|
|
|
|
// Initial triangle list is octahedron.
|
|
std::vector<Triangle> triangles{{posX, posY, posZ}, {posX, posY, negZ}, {posX, negY, posZ},
|
|
{posX, negY, negZ}, {negX, posY, posZ}, {negX, posY, negZ},
|
|
{negX, negY, posZ}, {negX, negY, negZ}};
|
|
|
|
// Recursion: every iteration, convert the current model to a new
|
|
// model by breaking each triangle into 4 triangles.
|
|
for(int recursions = 0; recursions < 3; ++recursions)
|
|
{
|
|
std::vector<Triangle> new_triangles;
|
|
for(Triangle t : triangles)
|
|
{
|
|
// Split each of three edges in half, then fixup the
|
|
// length of the midpoint to match m_lanternModelRadius.
|
|
// Record the index the new vertices will eventually have in vertices.
|
|
VertexIndex v01{m_lanternModelRadius * nvmath::normalize(t.vert0.vertex + t.vert1.vertex),
|
|
vertexCount++};
|
|
VertexIndex v12{m_lanternModelRadius * nvmath::normalize(t.vert1.vertex + t.vert2.vertex),
|
|
vertexCount++};
|
|
VertexIndex v02{m_lanternModelRadius * nvmath::normalize(t.vert0.vertex + t.vert2.vertex),
|
|
vertexCount++};
|
|
|
|
// Old triangle becomes 4 new triangles.
|
|
new_triangles.push_back({t.vert0, v01, v02});
|
|
new_triangles.push_back({t.vert1, v01, v12});
|
|
new_triangles.push_back({t.vert2, v02, v12});
|
|
new_triangles.push_back({v01, v02, v12});
|
|
}
|
|
triangles = std::move(new_triangles);
|
|
}
|
|
|
|
vertices.resize(vertexCount);
|
|
indices.clear();
|
|
indices.reserve(triangles.size() * 3);
|
|
|
|
// Write out the vertices to the vertices vector, and
|
|
// connect the tesselated triangles with indices in the indices vector.
|
|
for(Triangle t : triangles)
|
|
{
|
|
vertices[t.vert0.index] = t.vert0.vertex;
|
|
vertices[t.vert1.index] = t.vert1.vertex;
|
|
vertices[t.vert2.index] = t.vert2.vertex;
|
|
indices.push_back(t.vert0.index);
|
|
indices.push_back(t.vert1.index);
|
|
indices.push_back(t.vert2.index);
|
|
}
|
|
}
|
|
|
|
// Create the BLAS storing triangles for the spherical lantern model. This fills in
|
|
// m_lanternVertexBuffer: packed VkBuffer of vec3
|
|
// m_lanternIndexBuffer: packed VkBuffer of 32-bit indices
|
|
// m_lanternBlasInput: BLAS for spherical lantern
|
|
//
|
|
// NOTE: A more elegant way to do this is to use a procedular hit group instead,
|
|
// then, this BLAS can just be one AABB. I wanted to avoid introducing the new
|
|
// concept of intersection shaders here.
|
|
void HelloVulkan::createLanternModel()
|
|
{
|
|
std::vector<nvmath::vec3f> vertices;
|
|
std::vector<uint32_t> indices;
|
|
fillLanternVerts(vertices, indices);
|
|
|
|
// Upload vertex and index data to buffers.
|
|
auto usageFlags = vk::BufferUsageFlagBits::eAccelerationStructureBuildInputReadOnlyKHR
|
|
| vk::BufferUsageFlagBits::eShaderDeviceAddress;
|
|
auto memFlags =
|
|
vk::MemoryPropertyFlagBits::eHostVisible | vk::MemoryPropertyFlagBits::eHostCoherent;
|
|
|
|
auto vertexBytes = vertices.size() * sizeof vertices[0];
|
|
m_lanternVertexBuffer = m_alloc.createBuffer(vertexBytes, usageFlags, memFlags);
|
|
void* map = m_alloc.map(m_lanternVertexBuffer);
|
|
memcpy(map, vertices.data(), vertexBytes);
|
|
m_alloc.unmap(m_lanternVertexBuffer);
|
|
|
|
auto indexBytes = indices.size() * sizeof indices[0];
|
|
m_lanternIndexBuffer = m_alloc.createBuffer(indexBytes, usageFlags, memFlags);
|
|
map = m_alloc.map(m_lanternIndexBuffer);
|
|
memcpy(map, indices.data(), indexBytes);
|
|
m_alloc.unmap(m_lanternIndexBuffer);
|
|
|
|
// Package vertex and index buffers as BlasInput.
|
|
vk::DeviceAddress vertexAddress = m_device.getBufferAddress({m_lanternVertexBuffer.buffer});
|
|
vk::DeviceAddress indexAddress = m_device.getBufferAddress({m_lanternIndexBuffer.buffer});
|
|
|
|
uint32_t maxPrimitiveCount = uint32_t(indices.size() / 3);
|
|
|
|
// Describe buffer as packed array of float vec3.
|
|
vk::AccelerationStructureGeometryTrianglesDataKHR triangles;
|
|
triangles.setVertexFormat(vk::Format::eR32G32B32Sfloat); // vec3 vertex position data.
|
|
triangles.setVertexData(vertexAddress);
|
|
triangles.setVertexStride(sizeof(nvmath::vec3f));
|
|
// Describe index data (32-bit unsigned int)
|
|
triangles.setIndexType(vk::IndexType::eUint32);
|
|
triangles.setIndexData(indexAddress);
|
|
// Indicate identity transform by setting transformData to null device pointer.
|
|
triangles.setTransformData({});
|
|
triangles.setMaxVertex(uint32_t(vertices.size()));
|
|
|
|
// Identify the above data as containing opaque triangles.
|
|
vk::AccelerationStructureGeometryKHR asGeom;
|
|
asGeom.setGeometryType(vk::GeometryTypeKHR::eTriangles);
|
|
asGeom.setFlags(vk::GeometryFlagBitsKHR::eOpaque);
|
|
asGeom.geometry.setTriangles(triangles);
|
|
|
|
// The entire array will be used to build the BLAS.
|
|
vk::AccelerationStructureBuildRangeInfoKHR offset;
|
|
offset.setFirstVertex(0);
|
|
offset.setPrimitiveCount(maxPrimitiveCount);
|
|
offset.setPrimitiveOffset(0);
|
|
offset.setTransformOffset(0);
|
|
|
|
// Our blas is made from only one geometry, but could be made of many geometries
|
|
m_lanternBlasInput.asGeometry.emplace_back(asGeom);
|
|
m_lanternBlasInput.asBuildOffsetInfo.emplace_back(offset);
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
//
|
|
// Build the array of BLAS in m_rtBuilder. There are `m_objModel.size() + 1`-many BLASes.
|
|
// The first `m_objModel.size()` are used for OBJ model BLASes, and the last one
|
|
// is used for the lanterns (model generated at runtime).
|
|
void HelloVulkan::createBottomLevelAS()
|
|
{
|
|
// BLAS - Storing each primitive in a geometry
|
|
std::vector<nvvk::RaytracingBuilderKHR::BlasInput> allBlas;
|
|
allBlas.reserve(m_objModel.size() + 1);
|
|
|
|
// Add OBJ models.
|
|
for(const auto& obj : m_objModel)
|
|
{
|
|
auto blas = objectToVkGeometryKHR(obj);
|
|
|
|
// We could add more geometry in each BLAS, but we add only one for now
|
|
allBlas.emplace_back(blas);
|
|
}
|
|
|
|
// Add lantern model.
|
|
createLanternModel();
|
|
m_lanternBlasId = allBlas.size();
|
|
allBlas.emplace_back(m_lanternBlasInput);
|
|
|
|
m_rtBuilder.buildBlas(allBlas, vk::BuildAccelerationStructureFlagBitsKHR::ePreferFastTrace);
|
|
}
|
|
|
|
// Build the TLAS in m_rtBuilder. Requires that the BLASes were already built and
|
|
// that all ObjInstance and lanterns have been added. One instance with hitGroupId=0
|
|
// is created for every OBJ instance, and one instance with hitGroupId=1 for each lantern.
|
|
//
|
|
// gl_InstanceCustomIndexEXT will be the index of the instance or lantern in m_objInstance or
|
|
// m_lanterns respectively.
|
|
void HelloVulkan::createTopLevelAS()
|
|
{
|
|
assert(m_lanternCount == 0);
|
|
m_lanternCount = m_lanterns.size();
|
|
|
|
std::vector<nvvk::RaytracingBuilderKHR::Instance> tlas;
|
|
tlas.reserve(m_objInstance.size() + m_lanternCount);
|
|
|
|
// Add the OBJ instances.
|
|
for(uint32_t i = 0; i < static_cast<uint32_t>(m_objInstance.size()); i++)
|
|
{
|
|
nvvk::RaytracingBuilderKHR::Instance rayInst;
|
|
rayInst.transform = m_objInstance[i].transform; // Position of the instance
|
|
rayInst.instanceCustomId = i; // gl_InstanceCustomIndexEXT
|
|
rayInst.blasId = m_objInstance[i].objIndex;
|
|
rayInst.hitGroupId = 0; // We will use the same hit group for all OBJ
|
|
rayInst.flags = VK_GEOMETRY_INSTANCE_TRIANGLE_FACING_CULL_DISABLE_BIT_KHR;
|
|
tlas.emplace_back(rayInst);
|
|
}
|
|
|
|
// Add lantern instances.
|
|
for(int i = 0; i < static_cast<int>(m_lanterns.size()); ++i)
|
|
{
|
|
nvvk::RaytracingBuilderKHR::Instance lanternInstance;
|
|
lanternInstance.transform = nvmath::translation_mat4(m_lanterns[i].position);
|
|
lanternInstance.instanceCustomId = i;
|
|
lanternInstance.blasId = uint32_t(m_lanternBlasId);
|
|
lanternInstance.hitGroupId = 1; // Next hit group is for lanterns.
|
|
lanternInstance.flags = VK_GEOMETRY_INSTANCE_TRIANGLE_FACING_CULL_DISABLE_BIT_KHR;
|
|
tlas.emplace_back(lanternInstance);
|
|
}
|
|
|
|
m_rtBuilder.buildTlas(tlas, vk::BuildAccelerationStructureFlagBitsKHR::ePreferFastTrace);
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// This descriptor set holds the Acceleration structure, output image, and lanterns array buffer.
|
|
//
|
|
void HelloVulkan::createRtDescriptorSet()
|
|
{
|
|
using vkDT = vk::DescriptorType;
|
|
using vkSS = vk::ShaderStageFlagBits;
|
|
using vkDSLB = vk::DescriptorSetLayoutBinding;
|
|
|
|
// TLAS (binding = 0)
|
|
m_rtDescSetLayoutBind.addBinding(
|
|
vkDSLB(0, vkDT::eAccelerationStructureKHR, 1, vkSS::eRaygenKHR | vkSS::eClosestHitKHR));
|
|
// Output image (binding = 1)
|
|
m_rtDescSetLayoutBind.addBinding(
|
|
vkDSLB(1, vkDT::eStorageImage, 1, vkSS::eRaygenKHR)); // Output image
|
|
|
|
// Lantern buffer (binding = 2)
|
|
m_rtDescSetLayoutBind.addBinding( //
|
|
vkDSLB(2, vkDT::eStorageBuffer, 1, vkSS::eRaygenKHR | vkSS::eClosestHitKHR));
|
|
assert(m_lanternCount > 0);
|
|
|
|
m_rtDescPool = m_rtDescSetLayoutBind.createPool(m_device);
|
|
m_rtDescSetLayout = m_rtDescSetLayoutBind.createLayout(m_device);
|
|
m_rtDescSet = m_device.allocateDescriptorSets({m_rtDescPool, 1, &m_rtDescSetLayout})[0];
|
|
|
|
vk::AccelerationStructureKHR tlas = m_rtBuilder.getAccelerationStructure();
|
|
vk::WriteDescriptorSetAccelerationStructureKHR descASInfo;
|
|
descASInfo.setAccelerationStructureCount(1);
|
|
descASInfo.setPAccelerationStructures(&tlas);
|
|
vk::DescriptorImageInfo imageInfo{
|
|
{}, m_offscreenColor.descriptor.imageView, vk::ImageLayout::eGeneral};
|
|
vk::DescriptorBufferInfo lanternBufferInfo{m_lanternIndirectBuffer.buffer, 0,
|
|
m_lanternCount * sizeof(LanternIndirectEntry)};
|
|
|
|
std::vector<vk::WriteDescriptorSet> writes;
|
|
writes.emplace_back(m_rtDescSetLayoutBind.makeWrite(m_rtDescSet, 0, &descASInfo));
|
|
writes.emplace_back(m_rtDescSetLayoutBind.makeWrite(m_rtDescSet, 1, &imageInfo));
|
|
writes.emplace_back(m_rtDescSetLayoutBind.makeWrite(m_rtDescSet, 2, &lanternBufferInfo));
|
|
m_device.updateDescriptorSets(static_cast<uint32_t>(writes.size()), writes.data(), 0, nullptr);
|
|
}
|
|
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// Writes the output image to the descriptor set
|
|
// - Required when changing resolution
|
|
//
|
|
void HelloVulkan::updateRtDescriptorSet()
|
|
{
|
|
using vkDT = vk::DescriptorType;
|
|
|
|
// (1) Output buffer
|
|
vk::DescriptorImageInfo imageInfo{
|
|
{}, m_offscreenColor.descriptor.imageView, vk::ImageLayout::eGeneral};
|
|
vk::WriteDescriptorSet wds{m_rtDescSet, 1, 0, 1, vkDT::eStorageImage, &imageInfo};
|
|
m_device.updateDescriptorSets(wds, nullptr);
|
|
}
|
|
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// Pipeline for the ray tracer: all shaders, raygen, chit, miss
|
|
//
|
|
// Shader list:
|
|
//
|
|
// 0 ====== Ray Generation Shaders =====================================================
|
|
//
|
|
// Raygen shader: Ray generation shader. Casts primary rays from camera to scene.
|
|
//
|
|
// 1 ====== Miss Shaders ===============================================================
|
|
//
|
|
// Miss shader 0: Miss shader when casting primary rays. Fill in clear color.
|
|
//
|
|
// 2 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
|
//
|
|
// Miss shader 1: Miss shader when casting shadow rays towards main light.
|
|
// Reports no shadow.
|
|
//
|
|
// 3 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
|
//
|
|
// Miss shader 2: Miss shader when casting shadow rays towards a lantern.
|
|
// Reports no lantern hit (-1).
|
|
//
|
|
// 4 ====== Hit Groups for Primary Rays (sbtRecordOffset=0) ============================
|
|
//
|
|
// chit shader 0: Closest hit shader for primary rays hitting OBJ instances
|
|
// (hitGroupId=0). Casts shadow ray (to sky light or to lantern,
|
|
// depending on pass number) and returns specular
|
|
// and diffuse light to add to output image.
|
|
//
|
|
// 5 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
|
//
|
|
// chit shader 1: Closest hit shader for primary rays hitting lantern instances
|
|
// (hitGroupId=1). Returns color value to replace the current
|
|
// image pixel color with (lanterns are self-illuminating).
|
|
//
|
|
// 6 - - - - Hit Groups for Lantern Shadow Rays (sbtRecordOffset=2) - - - - - - - - - - -
|
|
//
|
|
// chit shader 2: Closest hit shader for OBJ instances hit when casting shadow
|
|
// rays to a lantern. Returns -1 to report that the shadow ray
|
|
// failed to reach the targetted lantern.
|
|
//
|
|
// 7 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
|
//
|
|
// chit shader 3: Closest hit shader for lantern instances hit when casting shadow
|
|
// rays to a lantern. Returns the gl_CustomInstanceIndexEXT [lantern
|
|
// number] of the lantern hit.
|
|
//
|
|
// 8 =====================================================================================
|
|
void HelloVulkan::createRtPipeline()
|
|
{
|
|
vk::ShaderModule raygenSM = nvvk::createShaderModule(
|
|
m_device, nvh::loadFile("spv/raytrace.rgen.spv", true, defaultSearchPaths, true));
|
|
|
|
// Miss shader 0 invoked when a primary ray doesn't hit geometry. Fills in clear color.
|
|
vk::ShaderModule missSM = nvvk::createShaderModule(
|
|
m_device, nvh::loadFile("spv/raytrace.rmiss.spv", true, defaultSearchPaths, true));
|
|
|
|
// Miss shader 1 is invoked when a shadow ray (for the main scene light)
|
|
// misses the geometry. It simply indicates that no occlusion has been found.
|
|
vk::ShaderModule shadowmissSM = nvvk::createShaderModule(
|
|
m_device, nvh::loadFile("spv/raytraceShadow.rmiss.spv", true, defaultSearchPaths, true));
|
|
|
|
// Miss shader 2 is invoked when a shadow ray for lantern lighting misses the
|
|
// lantern. It shouldn't be invoked, but I include it just in case.
|
|
vk::ShaderModule lanternmissSM = nvvk::createShaderModule(
|
|
m_device, nvh::loadFile("spv/lanternShadow.rmiss.spv", true, defaultSearchPaths, true));
|
|
|
|
std::vector<vk::PipelineShaderStageCreateInfo> stages;
|
|
|
|
// Raygen
|
|
vk::RayTracingShaderGroupCreateInfoKHR rg{vk::RayTracingShaderGroupTypeKHR::eGeneral,
|
|
VK_SHADER_UNUSED_KHR, VK_SHADER_UNUSED_KHR,
|
|
VK_SHADER_UNUSED_KHR, VK_SHADER_UNUSED_KHR};
|
|
rg.setGeneralShader(static_cast<uint32_t>(stages.size()));
|
|
stages.push_back({{}, vk::ShaderStageFlagBits::eRaygenKHR, raygenSM, "main"});
|
|
m_rtShaderGroups.push_back(rg);
|
|
// Miss
|
|
vk::RayTracingShaderGroupCreateInfoKHR mg{vk::RayTracingShaderGroupTypeKHR::eGeneral,
|
|
VK_SHADER_UNUSED_KHR, VK_SHADER_UNUSED_KHR,
|
|
VK_SHADER_UNUSED_KHR, VK_SHADER_UNUSED_KHR};
|
|
mg.setGeneralShader(static_cast<uint32_t>(stages.size()));
|
|
stages.push_back({{}, vk::ShaderStageFlagBits::eMissKHR, missSM, "main"});
|
|
m_rtShaderGroups.push_back(mg);
|
|
|
|
// Shadow Miss
|
|
mg.setGeneralShader(static_cast<uint32_t>(stages.size()));
|
|
stages.push_back({{}, vk::ShaderStageFlagBits::eMissKHR, shadowmissSM, "main"});
|
|
m_rtShaderGroups.push_back(mg);
|
|
|
|
// Lantern Miss
|
|
mg.setGeneralShader(static_cast<uint32_t>(stages.size()));
|
|
stages.push_back({{}, vk::ShaderStageFlagBits::eMissKHR, lanternmissSM, "main"});
|
|
m_rtShaderGroups.push_back(mg);
|
|
|
|
// OBJ Primary Ray Hit Group - Closest Hit + AnyHit (not used)
|
|
vk::ShaderModule chitSM = nvvk::createShaderModule(
|
|
m_device, nvh::loadFile("spv/raytrace.rchit.spv", true, defaultSearchPaths, true));
|
|
|
|
vk::RayTracingShaderGroupCreateInfoKHR hg{vk::RayTracingShaderGroupTypeKHR::eTrianglesHitGroup,
|
|
VK_SHADER_UNUSED_KHR, VK_SHADER_UNUSED_KHR,
|
|
VK_SHADER_UNUSED_KHR, VK_SHADER_UNUSED_KHR};
|
|
hg.setClosestHitShader(static_cast<uint32_t>(stages.size()));
|
|
stages.push_back({{}, vk::ShaderStageFlagBits::eClosestHitKHR, chitSM, "main"});
|
|
m_rtShaderGroups.push_back(hg);
|
|
|
|
// Lantern Primary Ray Hit Group
|
|
vk::ShaderModule lanternChitSM = nvvk::createShaderModule(
|
|
m_device, nvh::loadFile("spv/lantern.rchit.spv", true, defaultSearchPaths, true));
|
|
|
|
vk::RayTracingShaderGroupCreateInfoKHR lanternHg{
|
|
vk::RayTracingShaderGroupTypeKHR::eTrianglesHitGroup, VK_SHADER_UNUSED_KHR,
|
|
VK_SHADER_UNUSED_KHR, VK_SHADER_UNUSED_KHR, VK_SHADER_UNUSED_KHR};
|
|
lanternHg.setClosestHitShader(static_cast<uint32_t>(stages.size()));
|
|
stages.push_back({{}, vk::ShaderStageFlagBits::eClosestHitKHR, lanternChitSM, "main"});
|
|
m_rtShaderGroups.push_back(lanternHg);
|
|
|
|
// OBJ Lantern Shadow Ray Hit Group
|
|
vk::ShaderModule lanternShadowObjChitSM = nvvk::createShaderModule(
|
|
m_device, nvh::loadFile("spv/lanternShadowObj.rchit.spv", true, defaultSearchPaths, true));
|
|
|
|
vk::RayTracingShaderGroupCreateInfoKHR lanternShadowObjHg{
|
|
vk::RayTracingShaderGroupTypeKHR::eTrianglesHitGroup, VK_SHADER_UNUSED_KHR,
|
|
VK_SHADER_UNUSED_KHR, VK_SHADER_UNUSED_KHR, VK_SHADER_UNUSED_KHR};
|
|
lanternShadowObjHg.setClosestHitShader(static_cast<uint32_t>(stages.size()));
|
|
stages.push_back({{}, vk::ShaderStageFlagBits::eClosestHitKHR, lanternShadowObjChitSM, "main"});
|
|
m_rtShaderGroups.push_back(lanternShadowObjHg);
|
|
|
|
// Lantern Lantern Shadow Ray Hit Group
|
|
vk::ShaderModule lanternShadowLanternChitSM =
|
|
nvvk::createShaderModule(m_device, nvh::loadFile("spv/lanternShadowLantern.rchit.spv", true,
|
|
defaultSearchPaths, true));
|
|
|
|
vk::RayTracingShaderGroupCreateInfoKHR lanternShadowLanternHg{
|
|
vk::RayTracingShaderGroupTypeKHR::eTrianglesHitGroup, VK_SHADER_UNUSED_KHR,
|
|
VK_SHADER_UNUSED_KHR, VK_SHADER_UNUSED_KHR, VK_SHADER_UNUSED_KHR};
|
|
lanternShadowLanternHg.setClosestHitShader(static_cast<uint32_t>(stages.size()));
|
|
stages.push_back(
|
|
{{}, vk::ShaderStageFlagBits::eClosestHitKHR, lanternShadowLanternChitSM, "main"});
|
|
m_rtShaderGroups.push_back(lanternShadowLanternHg);
|
|
|
|
vk::PipelineLayoutCreateInfo pipelineLayoutCreateInfo;
|
|
|
|
// Push constant: we want to be able to update constants used by the shaders
|
|
vk::PushConstantRange pushConstant{vk::ShaderStageFlagBits::eRaygenKHR
|
|
| vk::ShaderStageFlagBits::eClosestHitKHR
|
|
| vk::ShaderStageFlagBits::eMissKHR,
|
|
0, sizeof(RtPushConstant)};
|
|
pipelineLayoutCreateInfo.setPushConstantRangeCount(1);
|
|
pipelineLayoutCreateInfo.setPPushConstantRanges(&pushConstant);
|
|
|
|
// Descriptor sets: one specific to ray tracing, and one shared with the rasterization pipeline
|
|
std::vector<vk::DescriptorSetLayout> rtDescSetLayouts = {m_rtDescSetLayout, m_descSetLayout};
|
|
pipelineLayoutCreateInfo.setSetLayoutCount(static_cast<uint32_t>(rtDescSetLayouts.size()));
|
|
pipelineLayoutCreateInfo.setPSetLayouts(rtDescSetLayouts.data());
|
|
|
|
m_rtPipelineLayout = m_device.createPipelineLayout(pipelineLayoutCreateInfo);
|
|
|
|
// Assemble the shader stages and recursion depth info into the ray tracing pipeline
|
|
|
|
vk::RayTracingPipelineCreateInfoKHR rayPipelineInfo;
|
|
rayPipelineInfo.setStageCount(static_cast<uint32_t>(stages.size())); // Stages are shaders
|
|
rayPipelineInfo.setPStages(stages.data());
|
|
|
|
// In this case, m_rtShaderGroups.size() == 8: we have one raygen group,
|
|
// three miss shader groups, and four hit groups.
|
|
rayPipelineInfo.setGroupCount(static_cast<uint32_t>(m_rtShaderGroups.size()));
|
|
rayPipelineInfo.setPGroups(m_rtShaderGroups.data());
|
|
|
|
rayPipelineInfo.setMaxPipelineRayRecursionDepth(2); // Ray depth
|
|
rayPipelineInfo.setLayout(m_rtPipelineLayout);
|
|
m_rtPipeline = static_cast<const vk::Pipeline&>(
|
|
m_device.createRayTracingPipelineKHR({}, {}, rayPipelineInfo));
|
|
|
|
m_device.destroy(raygenSM);
|
|
m_device.destroy(missSM);
|
|
m_device.destroy(shadowmissSM);
|
|
m_device.destroy(lanternmissSM);
|
|
m_device.destroy(chitSM);
|
|
m_device.destroy(lanternChitSM);
|
|
m_device.destroy(lanternShadowObjChitSM);
|
|
m_device.destroy(lanternShadowLanternChitSM);
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// The Shader Binding Table (SBT)
|
|
// - getting all shader handles and write them in a SBT buffer
|
|
// - Besides exception, this could be always done like this
|
|
// See how the SBT buffer is used in run()
|
|
//
|
|
void HelloVulkan::createRtShaderBindingTable()
|
|
{
|
|
auto groupCount = static_cast<uint32_t>(m_rtShaderGroups.size());
|
|
assert(groupCount == 8 && "Update Comment"); // 8 shaders: raygen, 3 miss, 4 chit
|
|
|
|
uint32_t groupHandleSize = m_rtProperties.shaderGroupHandleSize; // Size of a program identifier
|
|
// Compute the actual size needed per SBT entry (round-up to alignment needed).
|
|
uint32_t groupSizeAligned =
|
|
nvh::align_up(groupHandleSize, m_rtProperties.shaderGroupBaseAlignment);
|
|
// Bytes needed for the SBT.
|
|
uint32_t sbtSize = groupCount * groupSizeAligned;
|
|
|
|
// Fetch all the shader handles used in the pipeline. This is opaque data,
|
|
// so we store it in a vector of bytes.
|
|
std::vector<uint8_t> shaderHandleStorage(sbtSize);
|
|
auto result = m_device.getRayTracingShaderGroupHandlesKHR(m_rtPipeline, 0, groupCount, sbtSize,
|
|
shaderHandleStorage.data());
|
|
assert(result == vk::Result::eSuccess);
|
|
|
|
// Allocate a buffer for storing the SBT. Give it a debug name for NSight.
|
|
m_rtSBTBuffer = m_alloc.createBuffer(
|
|
sbtSize,
|
|
vk::BufferUsageFlagBits::eTransferSrc | vk::BufferUsageFlagBits::eShaderDeviceAddress
|
|
| vk::BufferUsageFlagBits::eShaderBindingTableKHR,
|
|
vk::MemoryPropertyFlagBits::eHostVisible | vk::MemoryPropertyFlagBits::eHostCoherent);
|
|
m_debug.setObjectName(m_rtSBTBuffer.buffer, std::string("SBT").c_str());
|
|
|
|
// Map the SBT buffer and write in the handles.
|
|
void* mapped = m_alloc.map(m_rtSBTBuffer);
|
|
auto* pData = reinterpret_cast<uint8_t*>(mapped);
|
|
for(uint32_t g = 0; g < groupCount; g++)
|
|
{
|
|
memcpy(pData, shaderHandleStorage.data() + g * groupHandleSize, groupHandleSize);
|
|
pData += groupSizeAligned;
|
|
}
|
|
m_alloc.unmap(m_rtSBTBuffer);
|
|
m_alloc.finalizeAndReleaseStaging();
|
|
}
|
|
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// The compute shader just needs read/write access to the buffer of LanternIndirectEntry.
|
|
void HelloVulkan::createLanternIndirectDescriptorSet()
|
|
{
|
|
using vkDT = vk::DescriptorType;
|
|
using vkSS = vk::ShaderStageFlagBits;
|
|
using vkDSLB = vk::DescriptorSetLayoutBinding;
|
|
|
|
// Lantern buffer (binding = 0)
|
|
m_lanternIndirectDescSetLayoutBind.addBinding( //
|
|
vkDSLB(0, vkDT::eStorageBuffer, 1, vkSS::eCompute));
|
|
|
|
m_lanternIndirectDescPool = m_lanternIndirectDescSetLayoutBind.createPool(m_device);
|
|
m_lanternIndirectDescSetLayout = m_lanternIndirectDescSetLayoutBind.createLayout(m_device);
|
|
m_lanternIndirectDescSet = m_device.allocateDescriptorSets(
|
|
{m_lanternIndirectDescPool, 1, &m_lanternIndirectDescSetLayout})[0];
|
|
|
|
assert(m_lanternIndirectBuffer.buffer);
|
|
vk::DescriptorBufferInfo lanternBufferInfo{m_lanternIndirectBuffer.buffer, 0,
|
|
m_lanternCount * sizeof(LanternIndirectEntry)};
|
|
|
|
std::vector<vk::WriteDescriptorSet> writes;
|
|
writes.emplace_back(m_lanternIndirectDescSetLayoutBind.makeWrite(m_lanternIndirectDescSet, 0,
|
|
&lanternBufferInfo));
|
|
m_device.updateDescriptorSets(static_cast<uint32_t>(writes.size()), writes.data(), 0, nullptr);
|
|
}
|
|
|
|
// Create compute pipeline used to fill m_lanternIndirectBuffer with parameters
|
|
// for dispatching the correct number of ray traces.
|
|
void HelloVulkan::createLanternIndirectCompPipeline()
|
|
{
|
|
// Compile compute shader and package as stage.
|
|
vk::ShaderModule computeShader = nvvk::createShaderModule(
|
|
m_device, //
|
|
nvh::loadFile("spv/lanternIndirect.comp.spv", true, defaultSearchPaths, true));
|
|
vk::PipelineShaderStageCreateInfo stageInfo;
|
|
stageInfo.setStage(vk::ShaderStageFlagBits::eCompute);
|
|
stageInfo.setModule(computeShader);
|
|
stageInfo.setPName("main");
|
|
|
|
// Set up push constant and pipeline layout.
|
|
constexpr auto pushSize = static_cast<uint32_t>(sizeof(m_lanternIndirectPushConstants));
|
|
vk::PushConstantRange pushCRange = {vk::ShaderStageFlagBits::eCompute, 0, pushSize};
|
|
static_assert(pushSize <= 128, "Spec guarantees only 128 byte push constant");
|
|
vk::PipelineLayoutCreateInfo layoutInfo;
|
|
layoutInfo.setSetLayoutCount(1);
|
|
layoutInfo.setPSetLayouts(&m_lanternIndirectDescSetLayout);
|
|
layoutInfo.setPushConstantRangeCount(1);
|
|
layoutInfo.setPPushConstantRanges(&pushCRange);
|
|
m_lanternIndirectCompPipelineLayout = m_device.createPipelineLayout(layoutInfo);
|
|
|
|
// Create compute pipeline.
|
|
vk::ComputePipelineCreateInfo pipelineInfo;
|
|
pipelineInfo.setStage(stageInfo);
|
|
pipelineInfo.setLayout(m_lanternIndirectCompPipelineLayout);
|
|
m_lanternIndirectCompPipeline =
|
|
static_cast<const vk::Pipeline&>(m_device.createComputePipeline({}, pipelineInfo));
|
|
|
|
m_device.destroy(computeShader);
|
|
}
|
|
|
|
// Allocate the buffer used to pass lantern info + ray trace indirect parameters to ray tracer.
|
|
// Fill in the lantern info from m_lanterns (indirect info is filled per-frame on device
|
|
// using a compute shader). Must be called only after TLAS build.
|
|
//
|
|
// The buffer is an array of LanternIndirectEntry, entry i is for m_lanterns[i].
|
|
void HelloVulkan::createLanternIndirectBuffer()
|
|
{
|
|
assert(m_lanternCount > 0);
|
|
assert(m_lanternCount == m_lanterns.size());
|
|
|
|
// m_alloc behind the scenes uses cmdBuf to transfer data to the buffer.
|
|
nvvk::CommandPool cmdBufGet(m_device, m_graphicsQueueIndex);
|
|
vk::CommandBuffer cmdBuf = cmdBufGet.createCommandBuffer();
|
|
|
|
using Usage = vk::BufferUsageFlagBits;
|
|
m_lanternIndirectBuffer =
|
|
m_alloc.createBuffer(sizeof(LanternIndirectEntry) * m_lanternCount,
|
|
Usage::eIndirectBuffer | Usage::eTransferDst
|
|
| Usage::eShaderDeviceAddress | Usage::eStorageBuffer,
|
|
vk::MemoryPropertyFlagBits::eDeviceLocal);
|
|
|
|
std::vector<LanternIndirectEntry> entries(m_lanternCount);
|
|
for(size_t i = 0; i < m_lanternCount; ++i)
|
|
entries[i].lantern = m_lanterns[i];
|
|
cmdBuf.updateBuffer(m_lanternIndirectBuffer.buffer, 0, entries.size() * sizeof entries[0],
|
|
entries.data());
|
|
|
|
cmdBufGet.submitAndWait(cmdBuf);
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------------------------
|
|
// Ray Tracing the scene
|
|
//
|
|
// The raytracing is split into multiple passes:
|
|
//
|
|
// First pass fills in the initial values for every pixel in the output image.
|
|
// Illumination and shadow rays come from the main light.
|
|
//
|
|
// Subsequently, one lantern pass is run for each lantern in the scene. We run
|
|
// a compute shader to calculate a bounding scissor rectangle for each lantern's light
|
|
// effect. This is stored in m_lanternIndirectBuffer. Then an indirect trace rays command
|
|
// is run for every lantern within its scissor rectangle. The lanterns' light
|
|
// contribution is additively blended into the output image.
|
|
void HelloVulkan::raytrace(const vk::CommandBuffer& cmdBuf, const nvmath::vec4f& clearColor)
|
|
{
|
|
// Before tracing rays, we need to dispatch the compute shaders that
|
|
// fill in the ray trace indirect parameters for each lantern pass.
|
|
|
|
// First, barrier before, ensure writes aren't visible to previous frame.
|
|
vk::BufferMemoryBarrier bufferBarrier;
|
|
bufferBarrier.setSrcAccessMask(vk::AccessFlagBits::eIndirectCommandRead);
|
|
bufferBarrier.setDstAccessMask(vk::AccessFlagBits::eShaderWrite);
|
|
bufferBarrier.setSrcQueueFamilyIndex(VK_QUEUE_FAMILY_IGNORED);
|
|
bufferBarrier.setDstQueueFamilyIndex(VK_QUEUE_FAMILY_IGNORED);
|
|
bufferBarrier.setBuffer(m_lanternIndirectBuffer.buffer);
|
|
bufferBarrier.offset = 0;
|
|
bufferBarrier.size = m_lanternCount * sizeof m_lanterns[0];
|
|
cmdBuf.pipelineBarrier( //
|
|
vk::PipelineStageFlagBits::eDrawIndirect, //
|
|
vk::PipelineStageFlagBits::eComputeShader, //
|
|
vk::DependencyFlags(0), //
|
|
{}, {bufferBarrier}, {});
|
|
|
|
// Bind compute shader, update push constant and descriptors, dispatch compute.
|
|
cmdBuf.bindPipeline(vk::PipelineBindPoint::eCompute, m_lanternIndirectCompPipeline);
|
|
nvmath::mat4 view = getViewMatrix();
|
|
m_lanternIndirectPushConstants.viewRowX = view.row(0);
|
|
m_lanternIndirectPushConstants.viewRowY = view.row(1);
|
|
m_lanternIndirectPushConstants.viewRowZ = view.row(2);
|
|
m_lanternIndirectPushConstants.proj = getProjMatrix();
|
|
m_lanternIndirectPushConstants.nearZ = nearZ;
|
|
m_lanternIndirectPushConstants.screenX = m_size.width;
|
|
m_lanternIndirectPushConstants.screenY = m_size.height;
|
|
m_lanternIndirectPushConstants.lanternCount = int32_t(m_lanternCount);
|
|
cmdBuf.pushConstants<LanternIndirectPushConstants>(m_lanternIndirectCompPipelineLayout,
|
|
vk::ShaderStageFlagBits::eCompute, 0,
|
|
m_lanternIndirectPushConstants);
|
|
cmdBuf.bindDescriptorSets(vk::PipelineBindPoint::eCompute, m_lanternIndirectCompPipelineLayout, 0,
|
|
{m_lanternIndirectDescSet}, {});
|
|
cmdBuf.dispatch(1, 1, 1);
|
|
|
|
// Ensure compute results are visible when doing indirect ray trace.
|
|
bufferBarrier.setSrcAccessMask(vk::AccessFlagBits::eShaderWrite);
|
|
bufferBarrier.setDstAccessMask(vk::AccessFlagBits::eIndirectCommandRead);
|
|
cmdBuf.pipelineBarrier( //
|
|
vk::PipelineStageFlagBits::eComputeShader, //
|
|
vk::PipelineStageFlagBits::eDrawIndirect, //
|
|
vk::DependencyFlags(0), //
|
|
{}, {bufferBarrier}, {});
|
|
|
|
|
|
// Now move on to the actual ray tracing.
|
|
m_debug.beginLabel(cmdBuf, "Ray trace");
|
|
|
|
// Initialize push constant values
|
|
m_rtPushConstants.clearColor = clearColor;
|
|
m_rtPushConstants.lightPosition = m_pushConstant.lightPosition;
|
|
m_rtPushConstants.lightIntensity = m_pushConstant.lightIntensity;
|
|
m_rtPushConstants.lightType = m_pushConstant.lightType;
|
|
m_rtPushConstants.lanternPassNumber = -1; // Global non-lantern pass
|
|
m_rtPushConstants.screenX = m_size.width;
|
|
m_rtPushConstants.screenY = m_size.height;
|
|
m_rtPushConstants.lanternDebug = m_lanternDebug;
|
|
|
|
cmdBuf.bindPipeline(vk::PipelineBindPoint::eRayTracingKHR, m_rtPipeline);
|
|
cmdBuf.bindDescriptorSets(vk::PipelineBindPoint::eRayTracingKHR, m_rtPipelineLayout, 0,
|
|
{m_rtDescSet, m_descSet}, {});
|
|
cmdBuf.pushConstants<RtPushConstant>(m_rtPipelineLayout,
|
|
vk::ShaderStageFlagBits::eRaygenKHR
|
|
| vk::ShaderStageFlagBits::eClosestHitKHR
|
|
| vk::ShaderStageFlagBits::eMissKHR,
|
|
0, m_rtPushConstants);
|
|
|
|
// Size of a program identifier
|
|
uint32_t groupSize =
|
|
nvh::align_up(m_rtProperties.shaderGroupHandleSize, m_rtProperties.shaderGroupBaseAlignment);
|
|
uint32_t groupStride = groupSize;
|
|
vk::DeviceAddress sbtAddress = m_device.getBufferAddress({m_rtSBTBuffer.buffer});
|
|
|
|
using Stride = vk::StridedDeviceAddressRegionKHR;
|
|
std::array<Stride, 4> strideAddresses{
|
|
Stride{sbtAddress + 0u * groupSize, groupStride, groupSize * 1}, // raygen
|
|
Stride{sbtAddress + 1u * groupSize, groupStride, groupSize * 3}, // miss
|
|
Stride{sbtAddress + 4u * groupSize, groupStride, groupSize * 4}, // hit
|
|
Stride{0u, 0u, 0u}}; // callable
|
|
|
|
// First pass, illuminate scene with global light.
|
|
cmdBuf.traceRaysKHR(&strideAddresses[0], &strideAddresses[1], //
|
|
&strideAddresses[2], &strideAddresses[3], //
|
|
m_size.width, m_size.height, 1);
|
|
|
|
// Lantern passes, ensure previous pass completed, then add light contribution from each lantern.
|
|
for(int i = 0; i < static_cast<int>(m_lanternCount); ++i)
|
|
{
|
|
// Barrier to ensure previous pass finished.
|
|
vk::Image offscreenImage{m_offscreenColor.image};
|
|
vk::ImageSubresourceRange colorRange(vk::ImageAspectFlagBits::eColor, 0,
|
|
VK_REMAINING_MIP_LEVELS, 0, VK_REMAINING_ARRAY_LAYERS);
|
|
vk::ImageMemoryBarrier imageBarrier;
|
|
imageBarrier.setOldLayout(vk::ImageLayout::eGeneral);
|
|
imageBarrier.setNewLayout(vk::ImageLayout::eGeneral);
|
|
imageBarrier.setSrcQueueFamilyIndex(VK_QUEUE_FAMILY_IGNORED);
|
|
imageBarrier.setDstQueueFamilyIndex(VK_QUEUE_FAMILY_IGNORED);
|
|
imageBarrier.setImage(offscreenImage);
|
|
imageBarrier.setSubresourceRange(colorRange);
|
|
imageBarrier.setSrcAccessMask(vk::AccessFlagBits::eShaderWrite);
|
|
imageBarrier.setDstAccessMask(vk::AccessFlagBits::eShaderRead);
|
|
cmdBuf.pipelineBarrier(vk::PipelineStageFlagBits::eRayTracingShaderKHR, //
|
|
vk::PipelineStageFlagBits::eRayTracingShaderKHR, //
|
|
vk::DependencyFlags(0), //
|
|
{}, {}, {imageBarrier});
|
|
|
|
// Set lantern pass number.
|
|
m_rtPushConstants.lanternPassNumber = i;
|
|
cmdBuf.pushConstants<RtPushConstant>(m_rtPipelineLayout,
|
|
vk::ShaderStageFlagBits::eRaygenKHR
|
|
| vk::ShaderStageFlagBits::eClosestHitKHR
|
|
| vk::ShaderStageFlagBits::eMissKHR,
|
|
0, m_rtPushConstants);
|
|
|
|
// Execute lantern pass.
|
|
cmdBuf.traceRaysIndirectKHR(&strideAddresses[0], &strideAddresses[1], //
|
|
&strideAddresses[2], &strideAddresses[3], //
|
|
m_device.getBufferAddress({m_lanternIndirectBuffer.buffer})
|
|
+ i * sizeof(LanternIndirectEntry));
|
|
}
|
|
|
|
m_debug.endLabel(cmdBuf);
|
|
}
|