Use WebKit compositor in ui::Layer

ui/gfx/compositor/compositor_cc.cc

+// Copyright (c) 2011 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 "ui/gfx/compositor/compositor_cc.h"
+
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebCompositor.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebFloatPoint.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebSize.h"
+#include "ui/gfx/compositor/layer.h"
+#include "webkit/glue/webthread_impl.h"
+#include "webkit/gpu/webgraphicscontext3d_in_process_impl.h"
+
+namespace {
+webkit_glue::WebThreadImpl* g_compositor_thread = NULL;
+}  // anonymous namespace
+
+namespace ui {
+
+TextureCC::TextureCC() {
+}
+
+void TextureCC::SetCanvas(const SkCanvas& canvas,
+                          const gfx::Point& origin,
+                          const gfx::Size& overall_size) {
+}
+
+void TextureCC::Draw(const ui::TextureDrawParams& params,
+                     const gfx::Rect& clip_bounds_in_texture) {
+}
+
+CompositorCC::CompositorCC(CompositorDelegate* delegate,
+                           gfx::AcceleratedWidget widget,
+                           const gfx::Size& size)
+    : Compositor(delegate, size),
+      widget_(widget),
+      root_web_layer_(WebKit::WebLayer::create(this)) {
+  WebKit::WebLayerTreeView::Settings settings;
+  settings.enableCompositorThread = !!g_compositor_thread;
+  host_ = WebKit::WebLayerTreeView::create(this, root_web_layer_, settings);
+  root_web_layer_.setAnchorPoint(WebKit::WebFloatPoint(0.f, 0.f));
+  OnWidgetSizeChanged();
+}
+
+CompositorCC::~CompositorCC() {
+}
+
+void CompositorCC::InitializeThread() {
+  g_compositor_thread = new webkit_glue::WebThreadImpl("Browser Compositor");
+  WebKit::WebCompositor::setThread(g_compositor_thread);
+}
+
+void CompositorCC::TerminateThread() {
+  DCHECK(g_compositor_thread);
+  delete g_compositor_thread;
+  g_compositor_thread = NULL;
+}
+
+Texture* CompositorCC::CreateTexture() {
+  return new TextureCC();
+}
+
+void CompositorCC::Blur(const gfx::Rect& bounds) {
+  NOTIMPLEMENTED();
+}
+
+void CompositorCC::ScheduleDraw() {
+  if (g_compositor_thread)
+    host_.composite();
+  else
+    Compositor::ScheduleDraw();
+}
+
+void CompositorCC::OnNotifyStart(bool clear) {
+}
+
+void CompositorCC::OnNotifyEnd() {
+}
+
+void CompositorCC::OnWidgetSizeChanged() {
+  host_.setViewportSize(size());
+  root_web_layer_.setBounds(size());
+}
+
+void CompositorCC::OnRootLayerChanged() {
+  root_web_layer_.removeAllChildren();
+  root_web_layer_.addChild(root_layer()->web_layer());
+}
+
+void CompositorCC::DrawTree() {
+  host_.composite();
+}
+
+void CompositorCC::animateAndLayout(double frameBeginTime) {
+}
+
+void CompositorCC::applyScrollDelta(const WebKit::WebSize&) {
+}
+
+WebKit::WebGraphicsContext3D* CompositorCC::createContext3D() {
+  WebKit::WebGraphicsContext3D* context =
+      new webkit::gpu::WebGraphicsContext3DInProcessImpl(widget_, NULL);
+  WebKit::WebGraphicsContext3D::Attributes attrs;
+  context->initialize(attrs, 0, true);
+  return context;
+}
+
+void CompositorCC::didRebindGraphicsContext(bool success) {
+}
+
+void CompositorCC::scheduleComposite() {
+  ScheduleDraw();
+}
+
+void CompositorCC::notifyNeedsComposite() {
+  ScheduleDraw();
+}
+
+Compositor* Compositor::Create(CompositorDelegate* owner,
+                               gfx::AcceleratedWidget widget,
+                               const gfx::Size& size) {
+  return new CompositorCC(owner, widget, size);
+}
+
+}  // namespace ui