src/dawn_wire/client/Client.h

// 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_CLIENT_H_
#define DAWNWIRE_CLIENT_CLIENT_H_

#include <dawn/webgpu.h>
#include <dawn_wire/Wire.h>

#include "dawn_wire/WireClient.h"
#include "dawn_wire/WireCmd_autogen.h"
#include "dawn_wire/WireDeserializeAllocator.h"
#include "dawn_wire/client/ClientBase_autogen.h"

namespace dawn_wire { namespace client {

    class Device;
    class MemoryTransferService;

    class Client : public ClientBase {
      public:
        Client(CommandSerializer* serializer, MemoryTransferService* memoryTransferService);
        ~Client();

        WGPUDevice GetDevice();

        MemoryTransferService* GetMemoryTransferService() const {
            return mMemoryTransferService;
        }

        const volatile char* HandleCommands(const volatile char* commands, size_t size);
        ReservedTexture ReserveTexture(WGPUDevice device);

        template <typename Cmd>
        char* SerializeCommand(const Cmd& cmd, size_t extraSize = 0) {
            size_t requiredSize = cmd.GetRequiredSize();
            // TODO(cwallez@chromium.org): Check for overflows and allocation success?
            char* allocatedBuffer = GetCmdSpace(requiredSize + extraSize);
            cmd.Serialize(allocatedBuffer, *this);
            return allocatedBuffer + requiredSize;
        }

        void Disconnect();

      private:
#include "dawn_wire/client/ClientPrototypes_autogen.inc"

        char* GetCmdSpace(size_t size);

        Device* mDevice = nullptr;
        CommandSerializer* mSerializer = nullptr;
        WireDeserializeAllocator mAllocator;
        MemoryTransferService* mMemoryTransferService = nullptr;
        std::unique_ptr<MemoryTransferService> mOwnedMemoryTransferService = nullptr;

        std::vector<char> mDummyCmdSpace;
        bool mIsDisconnected = false;
    };

    const DawnProcTable& GetProcs();

    std::unique_ptr<MemoryTransferService> CreateInlineMemoryTransferService();

}}  // namespace dawn_wire::client

#endif  // DAWNWIRE_CLIENT_CLIENT_H_