1 // Copyright 2020 The Dawn Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #ifndef DAWNNATIVE_D3D12_CPUDESCRIPTORHEAPALLOCATION_H_ 16 #define DAWNNATIVE_D3D12_CPUDESCRIPTORHEAPALLOCATION_H_ 17 18 #include <cstdint> 19 20 #include "dawn_native/d3d12/d3d12_platform.h" 21 22 namespace dawn_native { namespace d3d12 { 23 24 // Wrapper for a handle into a CPU-only descriptor heap. 25 class CPUDescriptorHeapAllocation { 26 public: 27 CPUDescriptorHeapAllocation() = default; 28 CPUDescriptorHeapAllocation(D3D12_CPU_DESCRIPTOR_HANDLE baseDescriptor, uint32_t heapIndex); 29 30 D3D12_CPU_DESCRIPTOR_HANDLE GetBaseDescriptor() const; 31 32 D3D12_CPU_DESCRIPTOR_HANDLE OffsetFrom(uint32_t sizeIncrementInBytes, 33 uint32_t offsetInDescriptorCount) const; 34 uint32_t GetHeapIndex() const; 35 36 bool IsValid() const; 37 38 void Invalidate(); 39 40 private: 41 D3D12_CPU_DESCRIPTOR_HANDLE mBaseDescriptor = {0}; 42 uint32_t mHeapIndex = -1; 43 }; 44 45 }} // namespace dawn_native::d3d12 46 47 #endif // DAWNNATIVE_D3D12_CPUDESCRIPTORHEAPALLOCATION_H_ 48