content/common/gpu/null_transport_surface.cc

   1 // Copyright (c) 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 #include "content/common/gpu/null_transport_surface.h"
   6
   7 #include "base/command_line.h"
   8 #include "content/common/gpu/gpu_channel.h"
   9 #include "content/common/gpu/gpu_channel_manager.h"
  10 #include "content/common/gpu/gpu_command_buffer_stub.h"
  11 #include "content/public/common/content_switches.h"
  12 #include "gpu/command_buffer/service/context_group.h"
  13
  14 namespace content {
  15
  16 NullTransportSurface::NullTransportSurface(
  17     GpuChannelManager* manager,
  18     GpuCommandBufferStub* stub,
  19     const gfx::GLSurfaceHandle& handle)
  20     : PassThroughImageTransportSurface(manager,
  21                                        stub,
  22                                        manager->GetDefaultOffscreenSurface()),
  23       parent_client_id_(handle.parent_client_id) {
  24 }
  25
  26 NullTransportSurface::~NullTransportSurface() {
  27 }
  28
  29 bool NullTransportSurface::Initialize() {
  30   if (!surface())
  31     return false;
  32
  33   if (!PassThroughImageTransportSurface::Initialize())
  34     return false;
  35
  36   GpuChannel* parent_channel =
  37       GetHelper()->manager()->LookupChannel(parent_client_id_);
  38   if (parent_channel) {
  39     const base::CommandLine* command_line =
  40         base::CommandLine::ForCurrentProcess();
  41     if (command_line->HasSwitch(switches::kUIPrioritizeInGpuProcess))
  42       GetHelper()->SetPreemptByFlag(parent_channel->GetPreemptionFlag());
  43   }
  44
  45   return true;
  46 }
  47
  48 void NullTransportSurface::Destroy() {
  49   // Do not destroy |surface_| since we use the shared offscreen surface.
  50 }
  51
  52 gfx::SwapResult NullTransportSurface::SwapBuffers() {
  53   NOTIMPLEMENTED();
  54   return gfx::SwapResult::SWAP_FAILED;
  55 }
  56
  57 gfx::SwapResult NullTransportSurface::PostSubBuffer(int x,
  58                                                     int y,
  59                                                     int width,
  60                                                     int height) {
  61   NOTIMPLEMENTED();
  62   return gfx::SwapResult::SWAP_FAILED;
  63 }
  64
  65 void NullTransportSurface::SendVSyncUpdateIfAvailable() {
  66   NOTREACHED();
  67 }
  68
  69 bool NullTransportSurface::OnMakeCurrent(gfx::GLContext* context) {
  70   // Override PassThroughImageTransportSurface default behavior which
  71   // sets the swap interval.
  72   return true;
  73 }
  74
  75 }  // namespace content