content/browser/compositor/browser_compositor_output_surface.cc

   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 #include "content/browser/compositor/browser_compositor_output_surface.h"
   6
   7 #include "base/bind.h"
   8 #include "base/location.h"
   9 #include "base/strings/string_number_conversions.h"
  10 #include "content/browser/compositor/reflector_impl.h"
  11 #include "content/common/gpu/client/context_provider_command_buffer.h"
  12
  13 namespace content {
  14
  15 BrowserCompositorOutputSurface::BrowserCompositorOutputSurface(
  16     const scoped_refptr<cc::ContextProvider>& context_provider,
  17     const scoped_refptr<ui::CompositorVSyncManager>& vsync_manager)
  18     : OutputSurface(context_provider),
  19       vsync_manager_(vsync_manager),
  20       reflector_(nullptr) {
  21   Initialize();
  22 }
  23
  24 BrowserCompositorOutputSurface::BrowserCompositorOutputSurface(
  25     scoped_ptr<cc::SoftwareOutputDevice> software_device,
  26     const scoped_refptr<ui::CompositorVSyncManager>& vsync_manager)
  27     : OutputSurface(software_device.Pass()),
  28       vsync_manager_(vsync_manager),
  29       reflector_(nullptr) {
  30   Initialize();
  31 }
  32
  33 BrowserCompositorOutputSurface::~BrowserCompositorOutputSurface() {
  34   if (reflector_)
  35     reflector_->DetachFromOutputSurface();
  36   DCHECK(!reflector_);
  37   if (!HasClient())
  38     return;
  39   vsync_manager_->RemoveObserver(this);
  40 }
  41
  42 void BrowserCompositorOutputSurface::Initialize() {
  43   capabilities_.max_frames_pending = 1;
  44   capabilities_.adjust_deadline_for_parent = false;
  45 }
  46
  47 bool BrowserCompositorOutputSurface::BindToClient(
  48     cc::OutputSurfaceClient* client) {
  49   if (!OutputSurface::BindToClient(client))
  50     return false;
  51   // Don't want vsync notifications until there is a client.
  52   vsync_manager_->AddObserver(this);
  53   return true;
  54 }
  55
  56 void BrowserCompositorOutputSurface::OnUpdateVSyncParameters(
  57     base::TimeTicks timebase,
  58     base::TimeDelta interval) {
  59   DCHECK(HasClient());
  60   CommitVSyncParameters(timebase, interval);
  61 }
  62
  63 void BrowserCompositorOutputSurface::OnUpdateVSyncParametersFromGpu(
  64     base::TimeTicks timebase,
  65     base::TimeDelta interval) {
  66   DCHECK(HasClient());
  67   vsync_manager_->UpdateVSyncParameters(timebase, interval);
  68 }
  69
  70 void BrowserCompositorOutputSurface::SetReflector(ReflectorImpl* reflector) {
  71   reflector_ = reflector;
  72 }
  73
  74 }  // namespace content