content/browser/compositor/onscreen_display_client.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/onscreen_display_client.h"
   6
   7 #include "base/debug/trace_event.h"
   8 #include "cc/output/output_surface.h"
   9 #include "cc/surfaces/surface_factory.h"
  10 #include "cc/surfaces/surface_manager.h"
  11 #include "content/browser/compositor/surface_display_output_surface.h"
  12 #include "content/browser/gpu/browser_gpu_memory_buffer_manager.h"
  13 #include "content/common/host_shared_bitmap_manager.h"
  14
  15 namespace content {
  16
  17 OnscreenDisplayClient::OnscreenDisplayClient(
  18     scoped_ptr<cc::OutputSurface> output_surface,
  19     cc::SurfaceManager* manager,
  20     const cc::RendererSettings& settings,
  21     scoped_refptr<base::SingleThreadTaskRunner> task_runner)
  22     : output_surface_(output_surface.Pass()),
  23       display_(new cc::Display(this,
  24                                manager,
  25                                HostSharedBitmapManager::current(),
  26                                BrowserGpuMemoryBufferManager::current(),
  27                                settings)),
  28       task_runner_(task_runner),
  29       scheduled_draw_(false),
  30       output_surface_lost_(false),
  31       deferred_draw_(false),
  32       pending_frames_(0),
  33       weak_ptr_factory_(this) {
  34 }
  35
  36 OnscreenDisplayClient::~OnscreenDisplayClient() {
  37 }
  38
  39 bool OnscreenDisplayClient::Initialize() {
  40   return display_->Initialize(output_surface_.Pass());
  41 }
  42
  43 void OnscreenDisplayClient::CommitVSyncParameters(base::TimeTicks timebase,
  44                                                   base::TimeDelta interval) {
  45   surface_display_output_surface_->ReceivedVSyncParameters(timebase, interval);
  46 }
  47
  48 void OnscreenDisplayClient::DisplayDamaged() {
  49   if (scheduled_draw_ || deferred_draw_)
  50     return;
  51   TRACE_EVENT0("content", "OnscreenDisplayClient::DisplayDamaged");
  52   if (pending_frames_ >= display_->GetMaxFramesPending()) {
  53     deferred_draw_ = true;
  54   } else {
  55     ScheduleDraw();
  56   }
  57 }
  58
  59 void OnscreenDisplayClient::ScheduleDraw() {
  60   DCHECK(!deferred_draw_);
  61   DCHECK(!scheduled_draw_);
  62   scheduled_draw_ = true;
  63   task_runner_->PostTask(
  64       FROM_HERE,
  65       base::Bind(&OnscreenDisplayClient::Draw, weak_ptr_factory_.GetWeakPtr()));
  66 }
  67
  68 void OnscreenDisplayClient::OutputSurfaceLost() {
  69   output_surface_lost_ = true;
  70   surface_display_output_surface_->DidLoseOutputSurface();
  71 }
  72
  73 void OnscreenDisplayClient::Draw() {
  74   TRACE_EVENT0("content", "OnscreenDisplayClient::Draw");
  75   if (output_surface_lost_)
  76     return;
  77   scheduled_draw_ = false;
  78   display_->Draw();
  79 }
  80
  81 void OnscreenDisplayClient::DidSwapBuffers() {
  82   pending_frames_++;
  83 }
  84
  85 void OnscreenDisplayClient::DidSwapBuffersComplete() {
  86   pending_frames_--;
  87   if ((pending_frames_ < display_->GetMaxFramesPending()) && deferred_draw_) {
  88     deferred_draw_ = false;
  89     ScheduleDraw();
  90   }
  91 }
  92
  93 void OnscreenDisplayClient::SetMemoryPolicy(
  94     const cc::ManagedMemoryPolicy& policy) {
  95   surface_display_output_surface_->SetMemoryPolicy(policy);
  96 }
  97
  98 }  // namespace content