cc: Route offscreen context creation for compositor to the browser.

webkit/compositor_bindings/web_layer_tree_view_impl.cc

 // Copyright 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 "web_layer_tree_view_impl.h"
 
 #include "base/command_line.h"
 #include "base/string_number_conversions.h"
 #include "cc/input_handler.h"
 #include "cc/layer.h"
 #include "cc/layer_tree_host.h"
 #include "cc/thread.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebInputHandler.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebLayer.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebLayerTreeViewClient.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebLayerTreeView.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebRenderingStats.h"
+#include "third_party/WebKit/Source/Platform/chromium/public/WebSharedGraphicsContext3D.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebSize.h"
+#include "ui/gl/context_provider.h"
 #include "web_layer_impl.h"
 #include "web_to_ccinput_handler_adapter.h"
 #include "webkit/compositor_bindings/web_rendering_stats_impl.h"
 
 using namespace cc;
 
 namespace WebKit {
 
 WebLayerTreeViewImpl::WebLayerTreeViewImpl(WebLayerTreeViewClient* client)
     : m_client(client)
@@ skipping 246 matching lines @@
 void WebLayerTreeViewImpl::didCompleteSwapBuffers()
 {
     m_client->didCompleteSwapBuffers();
 }
 
 void WebLayerTreeViewImpl::scheduleComposite()
 {
     m_client->scheduleComposite();
 }
 
+class WebLayerTreeViewImpl::MainThreadContextProvider : public ui::ContextProvider {
+ public:
+  virtual bool InitializeOnMainThread() OVERRIDE { return true; }
+  virtual bool BindToCurrentThread() OVERRIDE { return true; }
+
+  virtual WebKit::WebGraphicsContext3D* Context3d() OVERRIDE {
+    return WebSharedGraphicsContext3D::mainThreadContext();
+  }
+  virtual class GrContext* GrContext() OVERRIDE {
+    return WebSharedGraphicsContext3D::mainThreadGrContext();
+  }
+
+  virtual void VerifyContexts() OVERRIDE {}
+ protected:

[piman, 2013/02/21 22:49:48]

nit: blank line before 'protected:'

[danakj, 2013/02/22 01:56:31]

Done.

+  virtual ~MainThreadContextProvider() {}
+};
+
+scoped_refptr<ui::ContextProvider> WebLayerTreeViewImpl::OffscreenContextProviderForMainThread() {
+  if (!m_contextsMainThread)
+    m_contextsMainThread = new MainThreadContextProvider;
+  return m_contextsMainThread;
+}
+
+class WebLayerTreeViewImpl::CompositorThreadContextProvider
+    : public ui::ContextProvider {
+ public:
+  CompositorThreadContextProvider() : destroyed_(false) {}
+
+  virtual bool InitializeOnMainThread() OVERRIDE {
+    return WebSharedGraphicsContext3D::createCompositorThreadContext();
+  }
+  virtual bool BindToCurrentThread() OVERRIDE {
+    return Context3d()->makeContextCurrent();
+  }
+
+  virtual WebKit::WebGraphicsContext3D* Context3d() OVERRIDE {
+    return WebSharedGraphicsContext3D::compositorThreadContext();
+  }
+  virtual class GrContext* GrContext() OVERRIDE {
+    return WebSharedGraphicsContext3D::compositorThreadGrContext();
+  }
+
+  virtual void VerifyContexts() OVERRIDE {
+    if (!Context3d() || Context3d()->isContextLost())
+      destroyed_ = true;

[piman, 2013/02/21 22:49:48]

same here wrt thread safety

[danakj, 2013/02/22 01:56:31]

Done.

+  }
+  bool destroyed() const { return destroyed_; }
+ protected:

[piman, 2013/02/21 22:49:48]

nit: blank line before 'protected:'

[danakj, 2013/02/22 01:56:31]

Done.

+  virtual ~CompositorThreadContextProvider() {}
+ private:

[piman, 2013/02/21 22:49:48]

nit: blank line before 'private:'

[danakj, 2013/02/22 01:56:31]

Done.

+  bool destroyed_;
+};
+
+scoped_refptr<ui::ContextProvider> WebLayerTreeViewImpl::OffscreenContextProviderForCompositorThread() {
+  if (!m_contextsCompositorThread ||
+      m_contextsCompositorThread->destroyed()) {
+    m_contextsCompositorThread = new CompositorThreadContextProvider;
+  }
+  return m_contextsCompositorThread;
+}
+
 } // namespace WebKit