| // Copyright 2019 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 DAWNWIRE_CLIENT_BUFFER_H_ |
| #define DAWNWIRE_CLIENT_BUFFER_H_ |
| |
| #include <dawn/webgpu.h> |
| |
| #include "dawn_wire/WireClient.h" |
| #include "dawn_wire/client/ObjectBase.h" |
| |
| #include <map> |
| |
| namespace dawn_wire { namespace client { |
| |
| class Buffer : public ObjectBase { |
| public: |
| using ObjectBase::ObjectBase; |
| |
| static WGPUBuffer Create(Device* device, const WGPUBufferDescriptor* descriptor); |
| static WGPUCreateBufferMappedResult CreateMapped(Device* device, |
| const WGPUBufferDescriptor* descriptor); |
| static WGPUBuffer CreateError(Device* device); |
| |
| ~Buffer(); |
| void ClearMapRequests(WGPUBufferMapAsyncStatus status); |
| |
| void MapReadAsync(WGPUBufferMapReadCallback callback, void* userdata); |
| void MapWriteAsync(WGPUBufferMapWriteCallback callback, void* userdata); |
| bool OnMapReadAsyncCallback(uint32_t requestSerial, |
| uint32_t status, |
| uint64_t initialDataInfoLength, |
| const uint8_t* initialDataInfo); |
| bool OnMapWriteAsyncCallback(uint32_t requestSerial, uint32_t status); |
| void* GetMappedRange(); |
| const void* GetConstMappedRange(); |
| void Unmap(); |
| |
| void Destroy(); |
| |
| void SetSubData(uint64_t start, uint64_t count, const void* data); |
| |
| bool IsMappedForReading() const; |
| bool IsMappedForWriting() const; |
| |
| private: |
| // We want to defer all the validation to the server, which means we could have multiple |
| // map request in flight at a single time and need to track them separately. |
| // On well-behaved applications, only one request should exist at a single time. |
| struct MapRequestData { |
| // TODO(enga): Use a tagged pointer to save space. |
| WGPUBufferMapReadCallback readCallback = nullptr; |
| WGPUBufferMapWriteCallback writeCallback = nullptr; |
| void* userdata = nullptr; |
| // TODO(enga): Use a tagged pointer to save space. |
| std::unique_ptr<MemoryTransferService::ReadHandle> readHandle = nullptr; |
| std::unique_ptr<MemoryTransferService::WriteHandle> writeHandle = nullptr; |
| }; |
| std::map<uint32_t, MapRequestData> mRequests; |
| uint32_t mRequestSerial = 0; |
| uint64_t mSize = 0; |
| |
| // Only one mapped pointer can be active at a time because Unmap clears all the in-flight |
| // requests. |
| // TODO(enga): Use a tagged pointer to save space. |
| std::unique_ptr<MemoryTransferService::ReadHandle> mReadHandle = nullptr; |
| std::unique_ptr<MemoryTransferService::WriteHandle> mWriteHandle = nullptr; |
| void* mMappedData = nullptr; |
| }; |
| |
| }} // namespace dawn_wire::client |
| |
| #endif // DAWNWIRE_CLIENT_BUFFER_H_ |