| // Copyright 2021 The Dawn & Tint Authors |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are met: |
| // |
| // 1. Redistributions of source code must retain the above copyright notice, this |
| // list of conditions and the following disclaimer. |
| // |
| // 2. Redistributions in binary form must reproduce the above copyright notice, |
| // this list of conditions and the following disclaimer in the documentation |
| // and/or other materials provided with the distribution. |
| // |
| // 3. Neither the name of the copyright holder nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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| |
| #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/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(BindingPoint, 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; |
| } |
| }; |
| |
| /// Ensure that all the fields of BindingPoint are reflected. |
| TINT_ASSERT_ALL_FIELDS_REFLECTED(BindingPoint); |
| |
| /// 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_ |