webkit/plugins/ppapi/host_array_buffer_var.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef PPAPI_WEBKIT_PLUGINS_PPAPI_HOST_ARRAY_BUFFER_VAR_H_
   6 #define PPAPI_WEBKIT_PLUGINS_PPAPI_HOST_ARRAY_BUFFER_VAR_H_
   7
   8 #include "base/shared_memory.h"
   9 #include "ppapi/c/pp_instance.h"
  10 #include "ppapi/shared_impl/host_resource.h"
  11 #include "ppapi/shared_impl/var.h"
  12 #include "third_party/WebKit/Source/WebKit/chromium/public/WebArrayBuffer.h"
  13
  14 namespace webkit {
  15 namespace ppapi {
  16
  17 // Represents a host-side ArrayBufferVar.
  18 class HostArrayBufferVar : public ::ppapi::ArrayBufferVar {
  19  public:
  20   explicit HostArrayBufferVar(uint32 size_in_bytes);
  21   explicit HostArrayBufferVar(const WebKit::WebArrayBuffer& buffer);
  22   explicit HostArrayBufferVar(uint32 size_in_bytes,
  23                               base::SharedMemoryHandle handle);
  24   virtual ~HostArrayBufferVar();
  25
  26   // ArrayBufferVar implementation.
  27   virtual void* Map() OVERRIDE;
  28   virtual void Unmap() OVERRIDE;
  29   virtual uint32 ByteLength() OVERRIDE;
  30   virtual bool CopyToNewShmem(
  31       PP_Instance instance,
  32       int* host_shm_handle_id,
  33       base::SharedMemoryHandle* plugin_shm_handle) OVERRIDE;
  34
  35   WebKit::WebArrayBuffer& webkit_buffer() { return buffer_; }
  36
  37  private:
  38   WebKit::WebArrayBuffer buffer_;
  39   // Tracks whether the data in the buffer is valid.
  40   bool valid_;
  41
  42   DISALLOW_COPY_AND_ASSIGN(HostArrayBufferVar);
  43 };
  44
  45 }  // namespace ppapi
  46 }  // namespace webkit
  47
  48 #endif  // PPAPI_WEBKIT_PLUGINS_PPAPI_HOST_ARRAY_BUFFER_VAR_H_