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 "ipc/ipc_listener.h"
   9 #include "ipc/ipc_sender.h"
  10 #include "ui/ozone/ozone_base_export.h"
  11
  12 namespace ui {
  13
  14 // Platform-specific object to support a GPU process host.
  15 //
  16 // ChromeOS on bare hardware will do display configuration and cursor
  17 // movement from the GPU process. This provides a conduit for the
  18 // messages needed to make this work.
  19 //
  20 // Under X11, we don't need any GPU messages for display configuration.
  21 // That's why there's no real functionality here: it's purely mechanism
  22 // to support additional messages needed by specific platforms.
  23 class OZONE_BASE_EXPORT GpuPlatformSupportHost : public IPC::Listener {
  24  public:
  25   GpuPlatformSupportHost();
  26   virtual ~GpuPlatformSupportHost();
  27
  28   // Called when the GPU process is spun up & channel established.
  29   virtual void OnChannelEstablished(int host_id, IPC::Sender* sender) = 0;
  30
  31   // Called when the GPU process is destroyed.
  32   virtual void OnChannelDestroyed(int host_id) = 0;
  33 };
  34
  35 // create a stub implementation.
  36 OZONE_BASE_EXPORT GpuPlatformSupportHost* CreateStubGpuPlatformSupportHost();
  37
  38 }  // namespace ui
  39
  40 #endif  // UI_OZONE_PUBLIC_GPU_PLATFORM_SUPPORT_HOST_H_