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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/compositor/onscreen_display_client.h"
#include "base/debug/trace_event.h"
#include "cc/output/output_surface.h"
#include "cc/surfaces/surface_factory.h"
#include "cc/surfaces/surface_manager.h"
#include "content/browser/compositor/surface_display_output_surface.h"
#include "content/common/host_shared_bitmap_manager.h"
namespace content {
OnscreenDisplayClient::OnscreenDisplayClient(
scoped_ptr<cc::OutputSurface> output_surface,
cc::SurfaceManager* manager,
scoped_refptr<base::SingleThreadTaskRunner> task_runner)
: output_surface_(output_surface.Pass()),
display_(
new cc::Display(this, manager, HostSharedBitmapManager::current())),
task_runner_(task_runner),
scheduled_draw_(false),
deferred_draw_(false),
pending_frames_(0),
weak_ptr_factory_(this) {
}
OnscreenDisplayClient::~OnscreenDisplayClient() {
}
scoped_ptr<cc::OutputSurface> OnscreenDisplayClient::CreateOutputSurface() {
DCHECK(output_surface_.get());
return output_surface_.Pass();
}
void OnscreenDisplayClient::CommitVSyncParameters(base::TimeTicks timebase,
base::TimeDelta interval) {
surface_display_output_surface_->ReceivedVSyncParameters(timebase, interval);
}
void OnscreenDisplayClient::DisplayDamaged() {
if (scheduled_draw_ || deferred_draw_)
return;
TRACE_EVENT0("content", "OnscreenDisplayClient::DisplayDamaged");
if (pending_frames_ >= display_->GetMaxFramesPending()) {
deferred_draw_ = true;
} else {
ScheduleDraw();
}
}
void OnscreenDisplayClient::ScheduleDraw() {
DCHECK(!deferred_draw_);
DCHECK(!scheduled_draw_);
scheduled_draw_ = true;
task_runner_->PostTask(
FROM_HERE,
base::Bind(&OnscreenDisplayClient::Draw, weak_ptr_factory_.GetWeakPtr()));
}
void OnscreenDisplayClient::Draw() {
TRACE_EVENT0("content", "OnscreenDisplayClient::Draw");
scheduled_draw_ = false;
display_->Draw();
}
void OnscreenDisplayClient::DidSwapBuffers() {
pending_frames_++;
}
void OnscreenDisplayClient::DidSwapBuffersComplete() {
pending_frames_--;
if ((pending_frames_ < display_->GetMaxFramesPending()) && deferred_draw_) {
deferred_draw_ = false;
ScheduleDraw();
}
}
} // namespace content
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