| // Copyright 2021 The Tint Authors. |
| // |
| // 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. |
| |
| #ifndef SRC_TINT_API_COMMON_BINDING_POINT_H_ |
| #define SRC_TINT_API_COMMON_BINDING_POINT_H_ |
| |
| #include <stdint.h> |
| |
| #include <functional> |
| |
| #include "src/tint/utils/math/hash.h" |
| #include "src/tint/utils/reflection/reflection.h" |
| #include "src/tint/utils/text/string_stream.h" |
| #include "src/tint/utils/traits/traits.h" |
| |
| namespace tint { |
| |
| /// BindingPoint holds a group and binding index. |
| struct BindingPoint { |
| /// The `@group` part of the binding point |
| uint32_t group = 0; |
| /// The `@binding` part of the binding point |
| uint32_t binding = 0; |
| |
| /// Reflect the fields of this class so that it can be used by tint::ForeachField() |
| TINT_REFLECT(group, binding); |
| |
| /// Equality operator |
| /// @param rhs the BindingPoint to compare against |
| /// @returns true if this BindingPoint is equal to `rhs` |
| inline bool operator==(const BindingPoint& rhs) const { |
| return group == rhs.group && binding == rhs.binding; |
| } |
| |
| /// Inequality operator |
| /// @param rhs the BindingPoint to compare against |
| /// @returns true if this BindingPoint is not equal to `rhs` |
| inline bool operator!=(const BindingPoint& rhs) const { return !(*this == rhs); } |
| |
| /// Less-than operator |
| /// @param rhs the BindingPoint to compare against |
| /// @returns true if this BindingPoint comes before @p rhs |
| inline bool operator<(const BindingPoint& rhs) const { |
| if (group < rhs.group) { |
| return true; |
| } |
| if (group > rhs.group) { |
| return false; |
| } |
| return binding < rhs.binding; |
| } |
| }; |
| |
| /// Prints the BindingPoint @p bp to @p o |
| /// @param o the stream to write to |
| /// @param bp the BindingPoint |
| /// @return the stream so calls can be chained |
| template <typename STREAM, typename = traits::EnableIfIsOStream<STREAM>> |
| auto& operator<<(STREAM& o, const BindingPoint& bp) { |
| return o << "[group: " << bp.group << ", binding: " << bp.binding << "]"; |
| } |
| |
| } // namespace tint |
| |
| namespace std { |
| |
| /// Custom std::hash specialization for tint::BindingPoint so BindingPoints can be used as keys for |
| /// std::unordered_map and std::unordered_set. |
| template <> |
| class hash<tint::BindingPoint> { |
| public: |
| /// @param binding_point the binding point to create a hash for |
| /// @return the hash value |
| inline std::size_t operator()(const tint::BindingPoint& binding_point) const { |
| return tint::Hash(binding_point.group, binding_point.binding); |
| } |
| }; |
| |
| } // namespace std |
| |
| #endif // SRC_TINT_API_COMMON_BINDING_POINT_H_ |