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/* Copyright (c) 2019, 2021, 2023-2025 The Khronos Group Inc.
* Copyright (c) 2019, 2021, 2023-2025 Valve Corporation
* Copyright (c) 2019, 2021, 2023-2025 LunarG, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
// Includes everything needed for overloading std::hash
#include "hash_util.h"
#include "vk_struct_compare.h"
#include <vulkan/vulkan.h>
#include <vulkan/utility/vk_safe_struct.hpp>
#include <vulkan/utility/vk_struct_helper.hpp>
#include <vector>
//
// Hash and equality and/or compare functions for selected Vk types (and useful collections thereof)
//
// We do not provide a hasher directly for VkDescriptorSetLayoutBinding structure because
// immutable samplers in the context of pipeline layout compatibility can't be compared
// by comparing their VkSampler handles. The immutable samplers are compared based on their
// create parameters. DescriptorSetLayoutBindingHashingData allows to specify a hash that is
// computed based on sampler create parameters. This hash is a combined hash that combine
// hashes of all samplers from the same binding.
struct DescriptorSetLayoutBindingHashingData {
const VkDescriptorSetLayoutBinding &binding;
size_t immutable_samplers_combined_hash = 0;
};
namespace std {
template <>
struct hash<DescriptorSetLayoutBindingHashingData> {
size_t operator()(const DescriptorSetLayoutBindingHashingData &value) const {
hash_util::HashCombiner hc;
const VkDescriptorSetLayoutBinding &binding = value.binding;
hc << binding.binding << binding.descriptorType << binding.descriptorCount << binding.stageFlags;
hc << value.immutable_samplers_combined_hash;
return hc.Value();
}
};
} // namespace std
// VkSamplerCreateInfo and its pNexts
static inline void HashCombineSamplerYcbcrConversionInfo(hash_util::HashCombiner &hc, const VkSamplerYcbcrConversionInfo &value) {
// TODO: clarify if conversion should be hashed based on parameters and not just by handle (similar to immutable samplers)
hc << value.conversion;
}
static inline void HashCombineSamplerBorderColorComponentMappingCreateInfo(
hash_util::HashCombiner &hc, const VkSamplerBorderColorComponentMappingCreateInfoEXT &value) {
hc << value.components.r;
hc << value.components.g;
hc << value.components.b;
hc << value.components.a;
hc << value.srgb;
}
static inline void HashCombineSamplerCustomBorderColorCreateInfo(hash_util::HashCombiner &hc,
const VkSamplerCustomBorderColorCreateInfoEXT &value) {
hc << value.customBorderColor.uint32[0];
hc << value.customBorderColor.uint32[1];
hc << value.customBorderColor.uint32[2];
hc << value.customBorderColor.uint32[3];
hc << value.format;
}
static inline void HashCombineSamplerReductionModeCreateInfo(hash_util::HashCombiner &hc,
const VkSamplerReductionModeCreateInfo *p_value) {
if (p_value) {
hc << p_value->reductionMode;
} else {
// Default reduction mode
hc << VK_SAMPLER_REDUCTION_MODE_WEIGHTED_AVERAGE;
}
}
static inline void HashCombineSamplerCreateInfo(hash_util::HashCombiner &hc, const VkSamplerCreateInfo &value) {
hc << value.flags;
hc << value.magFilter;
hc << value.minFilter;
hc << value.mipmapMode;
hc << value.addressModeU;
hc << value.addressModeV;
hc << value.addressModeW;
hc << value.mipLodBias;
hc << value.anisotropyEnable;
hc << value.maxAnisotropy;
hc << value.compareEnable;
hc << value.compareOp;
hc << value.minLod;
hc << value.maxLod;
hc << value.borderColor;
hc << value.unnormalizedCoordinates;
if (auto *ycbcr_conversion = vku::FindStructInPNextChain<VkSamplerYcbcrConversionInfo>(value.pNext)) {
HashCombineSamplerYcbcrConversionInfo(hc, *ycbcr_conversion);
}
if (auto *component_mapping = vku::FindStructInPNextChain<VkSamplerBorderColorComponentMappingCreateInfoEXT>(value.pNext)) {
HashCombineSamplerBorderColorComponentMappingCreateInfo(hc, *component_mapping);
}
if (auto *border_color = vku::FindStructInPNextChain<VkSamplerCustomBorderColorCreateInfoEXT>(value.pNext)) {
HashCombineSamplerCustomBorderColorCreateInfo(hc, *border_color);
}
// NOTE: do not have condition for reduction mode because hashing function runs logic
// for default reduction mode when pNext is null
auto *reduction_mode = vku::FindStructInPNextChain<VkSamplerReductionModeCreateInfo>(value.pNext);
HashCombineSamplerReductionModeCreateInfo(hc, reduction_mode);
}
static inline size_t HashSamplerCreateInfo(const VkSamplerCreateInfo &value) {
hash_util::HashCombiner hc;
HashCombineSamplerCreateInfo(hc, value);
return hc.Value();
}
// VkPushConstantRange
static inline bool operator==(const VkPushConstantRange &lhs, const VkPushConstantRange &rhs) {
return (lhs.stageFlags == rhs.stageFlags) && (lhs.offset == rhs.offset) && (lhs.size == rhs.size);
}
namespace std {
template <>
struct hash<VkPushConstantRange> {
size_t operator()(const VkPushConstantRange &value) const {
hash_util::HashCombiner hc;
return (hc << value.stageFlags << value.offset << value.size).Value();
}
};
} // namespace std
using PushConstantRanges = std::vector<VkPushConstantRange>;
namespace std {
template <>
struct hash<PushConstantRanges> : public hash_util::IsOrderedContainer<PushConstantRanges> {};
} // namespace std
// VkImageSubresourceRange
static inline bool operator==(const VkImageSubresourceRange &lhs, const VkImageSubresourceRange &rhs) {
return (lhs.aspectMask == rhs.aspectMask) && (lhs.baseMipLevel == rhs.baseMipLevel) && (lhs.levelCount == rhs.levelCount) &&
(lhs.baseArrayLayer == rhs.baseArrayLayer) && (lhs.layerCount == rhs.layerCount);
}
namespace std {
template <>
struct hash<VkImageSubresourceRange> {
size_t operator()(const VkImageSubresourceRange &value) const {
hash_util::HashCombiner hc;
hc << value.aspectMask << value.baseMipLevel << value.levelCount << value.baseArrayLayer << value.layerCount;
return hc.Value();
}
};
} // namespace std
static inline bool operator==(const VkShaderModuleIdentifierEXT &a, const VkShaderModuleIdentifierEXT &b) {
if (a.identifierSize != b.identifierSize) {
return false;
}
const uint32_t copy_size = std::min(VK_MAX_SHADER_MODULE_IDENTIFIER_SIZE_EXT, a.identifierSize);
for (uint32_t i = 0u; i < copy_size; ++i) {
if (a.identifier[i] != b.identifier[i]) {
return false;
}
}
return true;
}
namespace std {
template <>
struct hash<VkShaderModuleIdentifierEXT> {
size_t operator()(const VkShaderModuleIdentifierEXT &value) const {
return hash_util::HashCombiner().Combine(value.identifier, value.identifier + value.identifierSize).Value();
}
};
} // namespace std
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