78 lines
2.9 KiB
C++
78 lines
2.9 KiB
C++
// Copyright 2017 The NXT 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 BACKEND_PERSTAGE_H_
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#define BACKEND_PERSTAGE_H_
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#include "common/Assert.h"
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#include "common/BitSetIterator.h"
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#include "common/Constants.h"
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#include "nxt/nxtcpp.h"
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#include <array>
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namespace backend {
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static_assert(static_cast<uint32_t>(nxt::ShaderStage::Vertex) < kNumStages, "");
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static_assert(static_cast<uint32_t>(nxt::ShaderStage::Fragment) < kNumStages, "");
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static_assert(static_cast<uint32_t>(nxt::ShaderStage::Compute) < kNumStages, "");
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static_assert(static_cast<uint32_t>(nxt::ShaderStageBit::Vertex) ==
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(1 << static_cast<uint32_t>(nxt::ShaderStage::Vertex)),
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"");
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static_assert(static_cast<uint32_t>(nxt::ShaderStageBit::Fragment) ==
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(1 << static_cast<uint32_t>(nxt::ShaderStage::Fragment)),
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"");
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static_assert(static_cast<uint32_t>(nxt::ShaderStageBit::Compute) ==
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(1 << static_cast<uint32_t>(nxt::ShaderStage::Compute)),
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"");
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BitSetIterator<kNumStages, nxt::ShaderStage> IterateStages(nxt::ShaderStageBit stages);
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nxt::ShaderStageBit StageBit(nxt::ShaderStage stage);
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static constexpr nxt::ShaderStageBit kAllStages =
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static_cast<nxt::ShaderStageBit>((1 << kNumStages) - 1);
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template <typename T>
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class PerStage {
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public:
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T& operator[](nxt::ShaderStage stage) {
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NXT_ASSERT(static_cast<uint32_t>(stage) < kNumStages);
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return mData[static_cast<uint32_t>(stage)];
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}
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const T& operator[](nxt::ShaderStage stage) const {
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NXT_ASSERT(static_cast<uint32_t>(stage) < kNumStages);
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return mData[static_cast<uint32_t>(stage)];
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}
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T& operator[](nxt::ShaderStageBit stageBit) {
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uint32_t bit = static_cast<uint32_t>(stageBit);
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NXT_ASSERT(bit != 0 && IsPowerOfTwo(bit) && bit <= (1 << kNumStages));
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return mData[Log2(bit)];
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}
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const T& operator[](nxt::ShaderStageBit stageBit) const {
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uint32_t bit = static_cast<uint32_t>(stageBit);
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NXT_ASSERT(bit != 0 && IsPowerOfTwo(bit) && bit <= (1 << kNumStages));
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return mData[Log2(bit)];
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}
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private:
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std::array<T, kNumStages> mData;
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};
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} // namespace backend
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#endif // BACKEND_PERSTAGE_H_
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