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/browser_compositor_overlay_candidate_validator.h"
  11 #include "content/browser/compositor/reflector_impl.h"
  12 #include "content/common/gpu/client/context_provider_command_buffer.h"
  13
  14 namespace content {
  15
  16 BrowserCompositorOutputSurface::BrowserCompositorOutputSurface(
  17     const scoped_refptr<cc::ContextProvider>& context_provider,
  18     const scoped_refptr<ui::CompositorVSyncManager>& vsync_manager,
  19     scoped_ptr<BrowserCompositorOverlayCandidateValidator>
  20         overlay_candidate_validator)
  21     : OutputSurface(context_provider),
  22       vsync_manager_(vsync_manager),
  23       reflector_(nullptr) {
  24   overlay_candidate_validator_ = overlay_candidate_validator.Pass();
  25   Initialize();
  26 }
  27
  28 BrowserCompositorOutputSurface::BrowserCompositorOutputSurface(
  29     scoped_ptr<cc::SoftwareOutputDevice> software_device,
  30     const scoped_refptr<ui::CompositorVSyncManager>& vsync_manager)
  31     : OutputSurface(software_device.Pass()),
  32       vsync_manager_(vsync_manager),
  33       reflector_(nullptr) {
  34   Initialize();
  35 }
  36
  37 BrowserCompositorOutputSurface::~BrowserCompositorOutputSurface() {
  38   if (reflector_)
  39     reflector_->DetachFromOutputSurface();
  40   DCHECK(!reflector_);
  41   if (!HasClient())
  42     return;
  43   vsync_manager_->RemoveObserver(this);
  44 }
  45
  46 void BrowserCompositorOutputSurface::Initialize() {
  47   capabilities_.max_frames_pending = 1;
  48   capabilities_.adjust_deadline_for_parent = false;
  49 }
  50
  51 bool BrowserCompositorOutputSurface::BindToClient(
  52     cc::OutputSurfaceClient* client) {
  53   if (!OutputSurface::BindToClient(client))
  54     return false;
  55   // Don't want vsync notifications until there is a client.
  56   vsync_manager_->AddObserver(this);
  57   return true;
  58 }
  59
  60 void BrowserCompositorOutputSurface::OnUpdateVSyncParameters(
  61     base::TimeTicks timebase,
  62     base::TimeDelta interval) {
  63   DCHECK(HasClient());
  64   CommitVSyncParameters(timebase, interval);
  65 }
  66
  67 void BrowserCompositorOutputSurface::OnUpdateVSyncParametersFromGpu(
  68     base::TimeTicks timebase,
  69     base::TimeDelta interval) {
  70   DCHECK(HasClient());
  71   vsync_manager_->UpdateVSyncParameters(timebase, interval);
  72 }
  73
  74 void BrowserCompositorOutputSurface::SetReflector(ReflectorImpl* reflector) {
  75   // Software mirroring is done by doing a GL copy out of the framebuffer - if
  76   // we have overlays then that data will be missing.
  77   if (overlay_candidate_validator_) {
  78     overlay_candidate_validator_->SetSoftwareMirrorMode(reflector != nullptr);
  79   }
  80   reflector_ = reflector;
  81 }
  82
  83 cc::OverlayCandidateValidator*
  84 BrowserCompositorOutputSurface::GetOverlayCandidateValidator() const {
  85   return overlay_candidate_validator_.get();
  86 }
  87
  88 }  // namespace content