content/renderer/pepper/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_CONTENT_RENDERER_PEPPER_HOST_ARRAY_BUFFER_VAR_H_
   6 #define PPAPI_CONTENT_RENDERER_PEPPER_HOST_ARRAY_BUFFER_VAR_H_
   7
   8 #include "base/memory/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/public/platform/WebArrayBuffer.h"
  13
  14 namespace content {
  15
  16 // Represents a host-side ArrayBufferVar.
  17 class HostArrayBufferVar : public ppapi::ArrayBufferVar {
  18  public:
  19   explicit HostArrayBufferVar(uint32 size_in_bytes);
  20   explicit HostArrayBufferVar(const blink::WebArrayBuffer& buffer);
  21   explicit HostArrayBufferVar(uint32 size_in_bytes,
  22                               base::SharedMemoryHandle handle);
  23
  24   // ArrayBufferVar implementation.
  25   virtual void* Map() OVERRIDE;
  26   virtual void Unmap() OVERRIDE;
  27   virtual uint32 ByteLength() OVERRIDE;
  28   virtual bool CopyToNewShmem(PP_Instance instance,
  29                               int* host_shm_handle_id,
  30                               base::SharedMemoryHandle* plugin_shm_handle)
  31       OVERRIDE;
  32
  33   blink::WebArrayBuffer& webkit_buffer() { return buffer_; }
  34
  35  private:
  36   virtual ~HostArrayBufferVar();
  37
  38   blink::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 content
  46
  47 #endif  // PPAPI_CONTENT_RENDERER_PEPPER_HOST_ARRAY_BUFFER_VAR_H_