cc/surfaces/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 "cc/surfaces/onscreen_display_client.h"
   6
   7 #include "base/trace_event/trace_event.h"
   8 #include "cc/output/output_surface.h"
   9 #include "cc/surfaces/surface_display_output_surface.h"
  10 #include "cc/surfaces/surface_factory.h"
  11 #include "cc/surfaces/surface_manager.h"
  12
  13 namespace cc {
  14
  15 OnscreenDisplayClient::OnscreenDisplayClient(
  16     scoped_ptr<OutputSurface> output_surface,
  17     SurfaceManager* manager,
  18     SharedBitmapManager* bitmap_manager,
  19     gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager,
  20     const RendererSettings& settings,
  21     scoped_refptr<base::SingleThreadTaskRunner> task_runner)
  22     : output_surface_(output_surface.Pass()),
  23       display_(new Display(this,
  24                            manager,
  25                            bitmap_manager,
  26                            gpu_memory_buffer_manager,
  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(FROM_HERE, base::Bind(&OnscreenDisplayClient::Draw,
  64                                                weak_ptr_factory_.GetWeakPtr()));
  65 }
  66
  67 void OnscreenDisplayClient::OutputSurfaceLost() {
  68   output_surface_lost_ = true;
  69   surface_display_output_surface_->DidLoseOutputSurface();
  70 }
  71
  72 void OnscreenDisplayClient::Draw() {
  73   TRACE_EVENT0("content", "OnscreenDisplayClient::Draw");
  74   if (output_surface_lost_)
  75     return;
  76   scheduled_draw_ = false;
  77   display_->Draw();
  78 }
  79
  80 void OnscreenDisplayClient::DidSwapBuffers() {
  81   pending_frames_++;
  82 }
  83
  84 void OnscreenDisplayClient::DidSwapBuffersComplete() {
  85   pending_frames_--;
  86   if ((pending_frames_ < display_->GetMaxFramesPending()) && deferred_draw_) {
  87     deferred_draw_ = false;
  88     ScheduleDraw();
  89   }
  90 }
  91
  92 void OnscreenDisplayClient::SetMemoryPolicy(const ManagedMemoryPolicy& policy) {
  93   surface_display_output_surface_->SetMemoryPolicy(policy);
  94 }
  95
  96 }  // namespace cc