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// Copyright 2020 The Dawn 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 DAWNNATIVE_D3D12_CPUDESCRIPTORHEAPALLOCATION_H_
#define DAWNNATIVE_D3D12_CPUDESCRIPTORHEAPALLOCATION_H_
#include <cstdint>
#include "dawn_native/d3d12/d3d12_platform.h"
namespace dawn_native { namespace d3d12 {
// Wrapper for a handle into a CPU-only descriptor heap.
class CPUDescriptorHeapAllocation {
public:
CPUDescriptorHeapAllocation() = default;
CPUDescriptorHeapAllocation(D3D12_CPU_DESCRIPTOR_HANDLE baseDescriptor, uint32_t heapIndex);
D3D12_CPU_DESCRIPTOR_HANDLE GetBaseDescriptor() const;
D3D12_CPU_DESCRIPTOR_HANDLE OffsetFrom(uint32_t sizeIncrementInBytes,
uint32_t offsetInDescriptorCount) const;
uint32_t GetHeapIndex() const;
bool IsValid() const;
void Invalidate();
private:
D3D12_CPU_DESCRIPTOR_HANDLE mBaseDescriptor = {0};
uint32_t mHeapIndex = -1;
};
}} // namespace dawn_native::d3d12
#endif // DAWNNATIVE_D3D12_CPUDESCRIPTORHEAPALLOCATION_H_