91 lines
3.6 KiB
C++
91 lines
3.6 KiB
C++
/*
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* Extended sample base class for ray tracing based samples
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*
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* Copyright (C) 2020 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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#pragma once
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#include "vulkan/vulkan.h"
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#include "vulkanexamplebase.h"
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#include "VulkanTools.h"
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#include "VulkanDevice.h"
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class VulkanRaytracingSample : public VulkanExampleBase
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{
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protected:
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// Update the default render pass with different color attachment load ops
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virtual void updateRenderPass();
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public:
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// Function pointers for ray tracing related stuff
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PFN_vkGetBufferDeviceAddressKHR vkGetBufferDeviceAddressKHR;
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PFN_vkCreateAccelerationStructureKHR vkCreateAccelerationStructureKHR;
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PFN_vkDestroyAccelerationStructureKHR vkDestroyAccelerationStructureKHR;
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PFN_vkGetAccelerationStructureBuildSizesKHR vkGetAccelerationStructureBuildSizesKHR;
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PFN_vkGetAccelerationStructureDeviceAddressKHR vkGetAccelerationStructureDeviceAddressKHR;
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PFN_vkBuildAccelerationStructuresKHR vkBuildAccelerationStructuresKHR;
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PFN_vkCmdBuildAccelerationStructuresKHR vkCmdBuildAccelerationStructuresKHR;
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PFN_vkCmdTraceRaysKHR vkCmdTraceRaysKHR;
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PFN_vkGetRayTracingShaderGroupHandlesKHR vkGetRayTracingShaderGroupHandlesKHR;
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PFN_vkCreateRayTracingPipelinesKHR vkCreateRayTracingPipelinesKHR;
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// Available features and properties
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VkPhysicalDeviceRayTracingPipelinePropertiesKHR rayTracingPipelineProperties{};
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VkPhysicalDeviceAccelerationStructureFeaturesKHR accelerationStructureFeatures{};
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// Enabled features and properties
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VkPhysicalDeviceBufferDeviceAddressFeatures enabledBufferDeviceAddresFeatures{};
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VkPhysicalDeviceRayTracingPipelineFeaturesKHR enabledRayTracingPipelineFeatures{};
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VkPhysicalDeviceAccelerationStructureFeaturesKHR enabledAccelerationStructureFeatures{};
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// Holds information for a ray tracing scratch buffer that is used as a temporary storage
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struct ScratchBuffer
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{
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uint64_t deviceAddress = 0;
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VkBuffer handle = VK_NULL_HANDLE;
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VkDeviceMemory memory = VK_NULL_HANDLE;
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};
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// Holds information for a ray tracing acceleration structure
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struct AccelerationStructure {
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VkAccelerationStructureKHR handle;
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uint64_t deviceAddress = 0;
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VkDeviceMemory memory;
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VkBuffer buffer;
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};
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// Holds information for a storage image that the ray tracing shaders output to
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struct StorageImage {
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VkDeviceMemory memory = VK_NULL_HANDLE;
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VkImage image = VK_NULL_HANDLE;
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VkImageView view = VK_NULL_HANDLE;
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VkFormat format;
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} storageImage;
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// Extends the buffer class and holds information for a shader binding table
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class ShaderBindingTable : public vks::Buffer {
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public:
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VkStridedDeviceAddressRegionKHR stridedDeviceAddressRegion{};
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};
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// Set to true, to denote that the sample only uses ray queries (changes extension and render pass handling)
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bool rayQueryOnly = false;
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void enableExtensions();
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ScratchBuffer createScratchBuffer(VkDeviceSize size);
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void deleteScratchBuffer(ScratchBuffer& scratchBuffer);
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void createAccelerationStructure(AccelerationStructure& accelerationStructure, VkAccelerationStructureTypeKHR type, VkAccelerationStructureBuildSizesInfoKHR buildSizeInfo);
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void deleteAccelerationStructure(AccelerationStructure& accelerationStructure);
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uint64_t getBufferDeviceAddress(VkBuffer buffer);
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void createStorageImage(VkFormat format, VkExtent3D extent);
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void deleteStorageImage();
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VkStridedDeviceAddressRegionKHR getSbtEntryStridedDeviceAddressRegion(VkBuffer buffer, uint32_t handleCount);
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void createShaderBindingTable(ShaderBindingTable& shaderBindingTable, uint32_t handleCount);
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// Draw the ImGUI UI overlay using a render pass
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void drawUI(VkCommandBuffer commandBuffer, VkFramebuffer framebuffer);
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virtual void prepare();
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};
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