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b8a56af176
Format::aspect should be a mask so that it is easier to iterate over and test if an aspect is present. This CL also re-exports wgpu's EnumClassBitMask helpers in dawn_native. It also adds an EnumMaskIterator which wraps BitSetIterator to allow iterating over the enums in an enum mask. Bug: dawn:439 Change-Id: I08180a45b27c6031e2f80b0fa1801716677fd813 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/24682 Reviewed-by: Corentin Wallez <cwallez@chromium.org> Reviewed-by: Jiawei Shao <jiawei.shao@intel.com> Commit-Queue: Austin Eng <enga@chromium.org>
81 lines
2.2 KiB
C++
81 lines
2.2 KiB
C++
// Copyright 2020 The Dawn 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 DAWNNATIVE_ENUMMASKITERATOR_H_
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#define DAWNNATIVE_ENUMMASKITERATOR_H_
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#include "common/BitSetIterator.h"
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#include "dawn_native/EnumClassBitmasks.h"
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namespace dawn_native {
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template <typename T>
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class EnumMaskIterator final {
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static constexpr size_t N = EnumBitmaskSize<T>::value;
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static_assert(N > 0, "");
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using U = std::underlying_type_t<T>;
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public:
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EnumMaskIterator(const T& mask) : mBitSetIterator(std::bitset<N>(static_cast<U>(mask))) {
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}
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class Iterator final {
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public:
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Iterator(const typename BitSetIterator<N, U>::Iterator& iter) : mIter(iter) {
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}
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Iterator& operator++() {
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++mIter;
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return *this;
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}
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bool operator==(const Iterator& other) const {
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return mIter == other.mIter;
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}
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bool operator!=(const Iterator& other) const {
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return mIter != other.mIter;
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}
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T operator*() const {
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U value = *mIter;
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return static_cast<T>(U(1) << value);
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}
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private:
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typename BitSetIterator<N, U>::Iterator mIter;
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};
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Iterator begin() const {
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return Iterator(mBitSetIterator.begin());
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}
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Iterator end() const {
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return Iterator(mBitSetIterator.end());
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}
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private:
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BitSetIterator<N, U> mBitSetIterator;
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};
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template <typename T>
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EnumMaskIterator<T> IterateEnumMask(const T& mask) {
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return EnumMaskIterator<T>(mask);
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}
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} // namespace dawn_native
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#endif // DAWNNATIVE_ENUMMASKITERATOR_H_
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