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// Copyright 2017 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"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef SRC_DAWN_NATIVE_PERSTAGE_H_
#define SRC_DAWN_NATIVE_PERSTAGE_H_
#include <array>
#include "dawn/common/Assert.h"
#include "dawn/common/BitSetIterator.h"
#include "dawn/common/Constants.h"
#include "dawn/native/Error.h"
#include "dawn/native/dawn_platform.h"
namespace dawn::native {
enum class SingleShaderStage { Vertex, Fragment, Compute };
static_assert(static_cast<uint32_t>(SingleShaderStage::Vertex) < kNumStages);
static_assert(static_cast<uint32_t>(SingleShaderStage::Fragment) < kNumStages);
static_assert(static_cast<uint32_t>(SingleShaderStage::Compute) < kNumStages);
static_assert(static_cast<uint32_t>(wgpu::ShaderStage::Vertex) ==
(1 << static_cast<uint32_t>(SingleShaderStage::Vertex)));
static_assert(static_cast<uint32_t>(wgpu::ShaderStage::Fragment) ==
(1 << static_cast<uint32_t>(SingleShaderStage::Fragment)));
static_assert(static_cast<uint32_t>(wgpu::ShaderStage::Compute) ==
(1 << static_cast<uint32_t>(SingleShaderStage::Compute)));
BitSetIterator<kNumStages, SingleShaderStage> IterateStages(wgpu::ShaderStage stages);
wgpu::ShaderStage StageBit(SingleShaderStage stage);
static constexpr wgpu::ShaderStage kAllStages =
static_cast<wgpu::ShaderStage>((1 << kNumStages) - 1);
template <typename T>
class PerStage {
public:
PerStage() = default;
explicit PerStage(const T& initialValue) { mData.fill(initialValue); }
T& operator[](SingleShaderStage stage) {
DAWN_ASSERT(static_cast<uint32_t>(stage) < kNumStages);
return mData[static_cast<uint32_t>(stage)];
}
const T& operator[](SingleShaderStage stage) const {
DAWN_ASSERT(static_cast<uint32_t>(stage) < kNumStages);
return mData[static_cast<uint32_t>(stage)];
}
T& operator[](wgpu::ShaderStage stageBit) {
uint32_t bit = static_cast<uint32_t>(stageBit);
DAWN_ASSERT(bit != 0 && IsPowerOfTwo(bit) && bit <= (1 << kNumStages));
return mData[Log2(bit)];
}
const T& operator[](wgpu::ShaderStage stageBit) const {
uint32_t bit = static_cast<uint32_t>(stageBit);
DAWN_ASSERT(bit != 0 && IsPowerOfTwo(bit) && bit <= (1 << kNumStages));
return mData[Log2(bit)];
}
private:
std::array<T, kNumStages> mData;
};
} // namespace dawn::native
#endif // SRC_DAWN_NATIVE_PERSTAGE_H_