[PPAPI] Compositor API implementation

content/renderer/pepper/pepper_compositor_host.h

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// 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.
 
-#ifndef CONTENT_RENDERER_PEPPER_PEPPER_AUDIO_INPUT_HOST_H_
-#define CONTENT_RENDERER_PEPPER_PEPPER_AUDIO_INPUT_HOST_H_
+#ifndef CONTENT_RENDERER_PEPPER_PEPPER_COMPOSITOR_H_
+#define CONTENT_RENDERER_PEPPER_PEPPER_COMPOSITOR_H_
 
-#include <string>
-
-#include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/memory/shared_memory.h"
-#include "base/sync_socket.h"
-#include "content/renderer/pepper/pepper_device_enumeration_host_helper.h"
-#include "ipc/ipc_platform_file.h"
-#include "ppapi/c/ppb_audio_config.h"
+#include "base/memory/weak_ptr.h"
 #include "ppapi/host/host_message_context.h"
 #include "ppapi/host/resource_host.h"
+#include "ppapi/shared_impl/compositor_layer_data.h"
+
+namespace base {
+class SharedMemory;
+}  // namespace base
+
+namespace cc {
+class Layer;
+}  // namespace cc
 
 namespace content {
-class PepperPlatformAudioInput;
-class RendererPpapiHostImpl;
 
-class PepperAudioInputHost : public ppapi::host::ResourceHost {
+class PepperPluginInstanceImpl;
+class RendererPpapiHost;
+
+class PepperCompositorHost : public ppapi::host::ResourceHost {
  public:
-  PepperAudioInputHost(RendererPpapiHostImpl* host,
+  PepperCompositorHost(RendererPpapiHost* host,
                        PP_Instance instance,
                        PP_Resource resource);
-  virtual ~PepperAudioInputHost();
+  // Associates this device with the given plugin instance. You can pass NULL
+  // to clear the existing device. Returns true on success. In this case, a
+  // repaint of the page will also be scheduled. Failure means that the device
+  // is already bound to a different instance, and nothing will happen.
+  bool BindToInstance(PepperPluginInstanceImpl* new_instance);
 
+  const scoped_refptr<cc::Layer> layer() { return layer_; };
+
+  void ViewInitiatedPaint();
+  void ViewFlushedPaint();
+
+ private:
+  virtual ~PepperCompositorHost();
+
+  int32_t VerifyCommittedLayers(
+      const std::vector<ppapi::CompositorLayerData>& layers,
+      bool reset);
+
+  void UpdateLayer(const scoped_refptr<cc::Layer>& layer,
+                   const ppapi::CompositorLayerData* pp_layer_old,
+                   const ppapi::CompositorLayerData* pp_layer);
+
+  void ResourceReleased(int32_t id,
+                        uint32_t sync_point,
+                        bool is_lost);
+  void ImageReleased(int32_t id,
+                     const scoped_ptr<base::SharedMemory>& shared_memory,
+                     uint32_t sync_point,
+                     bool is_lost);
+
+  // ResourceMessageHandler overrides:
   virtual int32_t OnResourceMessageReceived(
       const IPC::Message& msg,
       ppapi::host::HostMessageContext* context) OVERRIDE;
 
-  // Called when the stream is created.
-  void StreamCreated(base::SharedMemoryHandle shared_memory_handle,
-                     size_t shared_memory_size,
-                     base::SyncSocket::Handle socket);
-  void StreamCreationFailed();
+  // ppapi::host::ResourceHost overrides:
+  virtual bool IsCompositorHost() OVERRIDE;
 
- private:
-  int32_t OnOpen(ppapi::host::HostMessageContext* context,
-                 const std::string& device_id,
-                 PP_AudioSampleRate sample_rate,
-                 uint32_t sample_frame_count);
-  int32_t OnStartOrStop(ppapi::host::HostMessageContext* context, bool capture);
-  int32_t OnClose(ppapi::host::HostMessageContext* context);
+  // Message handlers:
+  int32_t OnHostMsgCommitLayers(
+      ppapi::host::HostMessageContext* context,
+      const std::vector<ppapi::CompositorLayerData>& layers,
+      bool reset);
 
-  void OnOpenComplete(int32_t result,
-                      base::SharedMemoryHandle shared_memory_handle,
-                      size_t shared_memory_size,
-                      base::SyncSocket::Handle socket_handle);
+  // Non-owning pointer to the plugin instance this context is currently bound
+  // to, if any. If the context is currently unbound, this will be NULL.
+  PepperPluginInstanceImpl* bound_instance_;
 
-  int32_t GetRemoteHandles(
-      const base::SyncSocket& socket,
-      const base::SharedMemory& shared_memory,
-      IPC::PlatformFileForTransit* remote_socket_handle,
-      base::SharedMemoryHandle* remote_shared_memory_handle);
+  // The toplevel cc::Layer. It is the parent of other cc::Layers.
+  scoped_refptr<cc::Layer> layer_;
 
-  void Close();
+  // A list of layers. It is used for updating layers' properties in
+  // subsequent CommitLayers() calls.
+  struct LayerData {
+    LayerData(const scoped_refptr<cc::Layer>& cc,
+              const ppapi::CompositorLayerData& pp)
+       : cc_layer(cc), pp_layer(pp) {}
+    scoped_refptr<cc::Layer> cc_layer;
+    ppapi::CompositorLayerData pp_layer;
+  };
+  std::vector<LayerData> layers_;
 
-  void SendOpenReply(int32_t result);
+  ppapi::host::ReplyMessageContext commit_layers_reply_context_;
 
-  // Non-owning pointer.
-  RendererPpapiHostImpl* renderer_ppapi_host_;
+  base::WeakPtrFactory<PepperCompositorHost> weak_factory_;
 
-  ppapi::host::ReplyMessageContext open_context_;
-
-  // Audio input object that we delegate audio IPC through.
-  // We don't own this pointer but are responsible for calling Shutdown on it.
-  PepperPlatformAudioInput* audio_input_;
-
-  PepperDeviceEnumerationHostHelper enumeration_helper_;
-
-  DISALLOW_COPY_AND_ASSIGN(PepperAudioInputHost);
+  DISALLOW_COPY_AND_ASSIGN(PepperCompositorHost);
 };
 
 }  // namespace content
 
-#endif  // CONTENT_RENDERER_PEPPER_PEPPER_AUDIO_INPUT_HOST_H_
+#endif  // CONTENT_RENDERER_PEPPER_PEPPER_COMPOSITOR_H_