3D Compositing in <browser>, first draft.

content/renderer/browser_plugin/browser_plugin_texture_provider.h

+// Copyright (c) 2012 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.
+
+#ifndef  CONTENT_RENDERER_BROWSER_PLUGIN_WEB_BROWSER_PLUGIN_TEXTURE_PROVIDER_H_
+#define  CONTENT_RENDERER_BROWSER_PLUGIN_WEB_BROWSER_PLUGIN_TEXTURE_PROVIDER_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "base/synchronization/lock.h"
+#include "content/common/browser_plugin_info.h"
+#include "content/common/content_export.h"
+#include "ipc/ipc_forwarding_message_filter.h"
+#include "third_party/WebKit/Source/Platform/chromium/public/WebExternalTextureProvider.h"
+#include "third_party/WebKit/Source/Platform/chromium/public/WebFloatRect.h"
+#include "ui/gfx/size.h"
+
+struct BrowserPluginMsg_UpdateRect_Params;
+
+class RenderViewImpl;
+
+namespace base {
+class MessageLoopProxy;
+}
+
+namespace content {
+
+class BrowserPluginManager;
+
+class CONTENT_EXPORT BrowserPluginTextureProvider
+    : public WebKit::WebExternalTextureProvider,
+      public IPC::Sender {
+ public:
+  BrowserPluginTextureProvider(int instance_id,
+                               int routing_id,
+                               IPC::ChannelProxy* channel_proxy);
+
+  void Destroy();
+
+  void OnMessageReceived(const IPC::Message& message);
+  void OnBuffersSwapped(
+      int instance_id,
+      uint64 surface_id,
+      const BrowserPlugin_SwapInfo& info);
+  void OnSurfaceResize(int instance_id, const gfx::Size& size);
+
+  // virtual to allow for mocking
+  virtual void Resize(const gfx::Size& size);
+  virtual void SurfaceResize(const gfx::Size& size);
+  virtual void SetDelayedSwap(
+      uint64 surface_id,
+      const BrowserPlugin_SwapInfo& delayed_swap_info);
+
+  // WebExternalTextureProvider implementation
+  virtual void setTextureProviderClient(Client*);
+
+  virtual unsigned textureId() const OVERRIDE;
+  virtual bool premultipliedAlpha() const OVERRIDE;
+  virtual bool flipped() const OVERRIDE;
+  virtual WebKit::WebFloatRect uvRect() const OVERRIDE;
+
+  // IPC::Sender implementation
+  virtual bool Send(IPC::Message* message) OVERRIDE;
+
+ private:
+  friend class MockBrowserPluginTextureProvider;
+
+  virtual ~BrowserPluginTextureProvider();
+
+  void DestroyImpl();
+  void ResizeImpl(const gfx::Size& size);
+
+  void SetUpFilter();
+  void RemoveFilter();
+
+  // Used as the main thread callback to signal that we are attached to a
+  // client
+  static void SignalReady(int instance_id);
+
+  WebExternalTextureProvider::Client* client_;
+
+  // The texture ID we are currently providing
+  unsigned texture_id_;
+
+  scoped_refptr<IPC::ForwardingMessageFilter> filter_;
+
+  int instance_id_;
+
+  // If impl_loop_ is 0, we are working only on the main thread
+  scoped_refptr<base::MessageLoopProxy> main_loop_, impl_loop_;
+
+  // The IPC channel used by the renderer to communicate with the host.
+  // This is allowed to be 0 only in testing, when a derived class should
+  // override SetUpFilter, RemoveFilter, and Send, which are the only members
+  // allowed to use channel_proxy.
+  IPC::ChannelProxy* channel_proxy_;
+
+  int host_routing_id_;
+
+  // The size of the next texture update we will receive
+  gfx::Size texture_size_;
+
+  // The size of the container
+  gfx::Size container_size_;
+
+  // Information for performing a delayed buffer swap during startup
+  bool has_delayed_swap_;
+  BrowserPlugin_SwapInfo delayed_swap_info_;
+
+  // This lock is for when we may be updating the impl_loop_ member, which
+  // could trigger a switch between threaded and non-threaded. It is also
+  // used for setting a delayed swap, as that relies on shared state.
+  base::Lock lock_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_BROWSER_PLUGIN_WEB_BROWSER_PLUGIN_TEXTURE_PROVIDER_H_