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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_OZONE_PLATFORM_FLATLAND_FLATLAND_GPU_HOST_H_
#define UI_OZONE_PLATFORM_FLATLAND_FLATLAND_GPU_HOST_H_
#include <inttypes.h>
#include "base/functional/callback.h"
#include "base/memory/raw_ptr.h"
#include "base/task/single_thread_task_runner.h"
#include "base/threading/thread_checker.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "ui/ozone/platform/flatland/mojom/scenic_gpu_host.mojom.h"
#include "ui/ozone/platform/flatland/mojom/scenic_gpu_service.mojom.h"
#include "ui/ozone/public/gpu_platform_support_host.h"
namespace ui {
class FlatlandWindowManager;
// Browser process object which supports a GPU process host.
//
// Once a GPU process starts, this objects binds to it over mojo and
// enables exchange of Flatland resources with it. In particular, we must
// exchange export tokens for each view surface, so that the surface can
// present to Flatland views managed by the browser.
class FlatlandGpuHost : public mojom::ScenicGpuHost,
public GpuPlatformSupportHost {
public:
FlatlandGpuHost(FlatlandWindowManager* flatland_window_manager);
~FlatlandGpuHost() override;
FlatlandGpuHost(const FlatlandGpuHost&) = delete;
FlatlandGpuHost& operator=(const FlatlandGpuHost&) = delete;
// Binds the receiver for the main process surface factory.
void Initialize(mojo::PendingReceiver<mojom::ScenicGpuHost> pending_receiver);
// Shuts down mojo service. After calling shutdown, it's safe to call
// Initialize() again.
void Shutdown();
// mojom::ScenicGpuHost:
void AttachSurfaceToWindow(
int32_t window_id,
mojo::PlatformHandle surface_view_holder_token_mojo) override;
// GpuPlatformSupportHost:
void OnChannelDestroyed(int host_id) override;
void OnGpuServiceLaunched(
int host_id,
GpuHostBindInterfaceCallback binder,
GpuHostTerminateCallback terminate_callback) override;
private:
void UpdateReceiver(uint32_t service_launch_count,
mojo::PendingReceiver<mojom::ScenicGpuHost> receiver);
const raw_ptr<FlatlandWindowManager> flatland_window_manager_;
mojo::Receiver<mojom::ScenicGpuHost> host_receiver_{this};
mojo::Receiver<mojom::ScenicGpuHost> gpu_receiver_{this};
mojo::Remote<mojom::ScenicGpuService> gpu_service_;
THREAD_CHECKER(ui_thread_checker_);
};
} // namespace ui
#endif // UI_OZONE_PLATFORM_FLATLAND_FLATLAND_GPU_HOST_H_
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