ui/ozone/public/gpu_platform_support_host.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef UI_OZONE_PUBLIC_GPU_PLATFORM_SUPPORT_HOST_H_
   6 #define UI_OZONE_PUBLIC_GPU_PLATFORM_SUPPORT_HOST_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "base/single_thread_task_runner.h"
  10 #include "ipc/ipc_listener.h"
  11 #include "ipc/ipc_sender.h"
  12 #include "ui/ozone/ozone_base_export.h"
  13
  14 namespace ui {
  15
  16 // Platform-specific object to support a GPU process host.
  17 //
  18 // ChromeOS on bare hardware will do display configuration and cursor
  19 // movement from the GPU process. This provides a conduit for the
  20 // messages needed to make this work.
  21 //
  22 // Under X11, we don't need any GPU messages for display configuration.
  23 // That's why there's no real functionality here: it's purely mechanism
  24 // to support additional messages needed by specific platforms.
  25 class OZONE_BASE_EXPORT GpuPlatformSupportHost : public IPC::Listener {
  26  public:
  27   GpuPlatformSupportHost();
  28   ~GpuPlatformSupportHost() override;
  29
  30   // Called when the GPU process is spun up & channel established.
  31   virtual void OnChannelEstablished(
  32       int host_id,
  33       scoped_refptr<base::SingleThreadTaskRunner> send_runner,
  34       const base::Callback<void(IPC::Message*)>& sender) = 0;
  35
  36   // Called when the GPU process is destroyed.
  37   virtual void OnChannelDestroyed(int host_id) = 0;
  38 };
  39
  40 // create a stub implementation.
  41 OZONE_BASE_EXPORT GpuPlatformSupportHost* CreateStubGpuPlatformSupportHost();
  42
  43 }  // namespace ui
  44
  45 #endif  // UI_OZONE_PUBLIC_GPU_PLATFORM_SUPPORT_HOST_H_