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/common/host_shared_bitmap_manager.h"
  12
  13 namespace content {
  14
  15 OnscreenDisplayClient::OnscreenDisplayClient(
  16     const scoped_refptr<cc::ContextProvider>& onscreen_context_provider,
  17     scoped_ptr<cc::OutputSurface> software_surface,
  18     cc::SurfaceManager* manager,
  19     scoped_refptr<base::SingleThreadTaskRunner> task_runner)
  20     : onscreen_context_provider_(onscreen_context_provider),
  21       software_surface_(software_surface.Pass()),
  22       display_(
  23           new cc::Display(this, manager, HostSharedBitmapManager::current())),
  24       task_runner_(task_runner),
  25       scheduled_draw_(false),
  26       weak_ptr_factory_(this) {
  27 }
  28
  29 OnscreenDisplayClient::~OnscreenDisplayClient() {
  30 }
  31
  32 scoped_ptr<cc::OutputSurface> OnscreenDisplayClient::CreateOutputSurface() {
  33   if (!onscreen_context_provider_.get())
  34     return software_surface_.Pass();
  35   return make_scoped_ptr(new cc::OutputSurface(onscreen_context_provider_))
  36       .Pass();
  37 }
  38
  39 void OnscreenDisplayClient::DisplayDamaged() {
  40   if (scheduled_draw_)
  41     return;
  42   TRACE_EVENT0("content", "OnscreenDisplayClient::DisplayDamaged");
  43   scheduled_draw_ = true;
  44   task_runner_->PostTask(
  45       FROM_HERE,
  46       base::Bind(&OnscreenDisplayClient::Draw, weak_ptr_factory_.GetWeakPtr()));
  47 }
  48
  49 void OnscreenDisplayClient::Draw() {
  50   TRACE_EVENT0("content", "OnscreenDisplayClient::Draw");
  51   scheduled_draw_ = false;
  52   display_->Draw();
  53 }
  54
  55 }  // namespace content