Connect Sky and Ganesh in SkyShell

sky/shell/ui/animator.cc

+// Copyright 2015 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 "sky/shell/ui/animator.h"
+
+#include "base/bind.h"
+#include "base/message_loop/message_loop.h"
+
+namespace sky {
+namespace shell {
+
+Animator::Animator(const Engine::Config& config, Engine* engine)
+    : config_(config),
+      engine_(engine),
+      engine_requested_frame_(false),
+      frame_in_progress_(false),
+      weak_factory_(this) {
+}
+
+Animator::~Animator() {
+}
+
+void Animator::RequestFrame() {
+  if (engine_requested_frame_)
+    return;
+  engine_requested_frame_ = true;
+
+  if (!frame_in_progress_) {
+    frame_in_progress_ = true;
+    base::MessageLoop::current()->PostTask(
+        FROM_HERE,
+        base::Bind(&Animator::BeginFrame, weak_factory_.GetWeakPtr()));
+  }
+}
+
+void Animator::BeginFrame() {
+  DCHECK(frame_in_progress_);
+  DCHECK(engine_requested_frame_);
+  engine_requested_frame_ = false;
+
+  engine_->BeginFrame(base::TimeTicks::Now());
+  config_.gpu_task_runner->PostTaskAndReply(
+      FROM_HERE,
+      base::Bind(&GPUDelegate::Draw, config_.gpu_delegate, engine_->Paint()),
+      base::Bind(&Animator::OnFrameComplete, weak_factory_.GetWeakPtr()));
+}
+
+void Animator::OnFrameComplete() {
+  DCHECK(frame_in_progress_);
+  frame_in_progress_ = false;
+  if (engine_requested_frame_) {
+    frame_in_progress_ = true;
+    BeginFrame();
+  }
+}
+
+}  // namespace shell
+}  // namespace sky