76 lines
2.6 KiB
C++
76 lines
2.6 KiB
C++
// Copyright 2021 The Tint Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef SRC_TINT_SEM_SAMPLER_TEXTURE_PAIR_H_
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#define SRC_TINT_SEM_SAMPLER_TEXTURE_PAIR_H_
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#include <cstdint>
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#include <functional>
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#include <ostream>
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#include "src/tint/sem/binding_point.h"
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namespace tint::sem {
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/// Mapping of a sampler to a texture it samples.
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struct SamplerTexturePair {
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/// group & binding values for a sampler.
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BindingPoint sampler_binding_point;
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/// group & binding values for a texture samepled by the sampler.
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BindingPoint texture_binding_point;
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/// Equality operator
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/// @param rhs the SamplerTexturePair to compare against
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/// @returns true if this SamplerTexturePair is equal to `rhs`
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inline bool operator==(const SamplerTexturePair& rhs) const {
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return sampler_binding_point == rhs.sampler_binding_point &&
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texture_binding_point == rhs.texture_binding_point;
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}
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/// Inequality operator
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/// @param rhs the SamplerTexturePair to compare against
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/// @returns true if this SamplerTexturePair is not equal to `rhs`
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inline bool operator!=(const SamplerTexturePair& rhs) const { return !(*this == rhs); }
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};
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/// Prints the SamplerTexturePair @p stp to @p o
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/// @param o the std::ostream to write to
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/// @param stp the SamplerTexturePair
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/// @return the std::ostream so calls can be chained
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inline std::ostream& operator<<(std::ostream& o, const SamplerTexturePair& stp) {
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return o << "[sampler: " << stp.sampler_binding_point
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<< ", texture: " << stp.sampler_binding_point << "]";
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}
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} // namespace tint::sem
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namespace std {
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/// Custom std::hash specialization for tint::sem::SamplerTexturePair so
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/// SamplerTexturePairs be used as keys for std::unordered_map and
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/// std::unordered_set.
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template <>
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class hash<tint::sem::SamplerTexturePair> {
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public:
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/// @param stp the texture pair to create a hash for
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/// @return the hash value
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inline std::size_t operator()(const tint::sem::SamplerTexturePair& stp) const {
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return tint::utils::Hash(stp.sampler_binding_point, stp.texture_binding_point);
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}
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};
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} // namespace std
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#endif // SRC_TINT_SEM_SAMPLER_TEXTURE_PAIR_H_
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