Created a BufferStorage abstract class.

src/build_angle.gypi

@@ -262,6 +262,8 @@
             'libGLESv2/Renderbuffer.h',
             'libGLESv2/renderer/Blit.cpp',
             'libGLESv2/renderer/Blit.h',
+            'libGLESv2/renderer/BufferStorage.h',
+            'libGLESv2/renderer/BufferStorage.cpp',
             'libGLESv2/renderer/FenceImpl.h',
             'libGLESv2/renderer/Fence9.cpp',
             'libGLESv2/renderer/Fence9.h',

src/libGLESv2/libGLESv2.vcxproj

@@ -246,6 +246,7 @@ copy "$(OutDir)libGLESv2.lib" "$(ProjectDir)..\..\lib\$(Configuration)\"
     <ClCompile Include="renderer\Blit.cpp" />
     <ClCompile Include="renderer\Fence11.cpp" />
     <ClCompile Include="renderer\Fence9.cpp" />
+    <ClCompile Include="renderer\BufferStorage.cpp" />
     <ClCompile Include="renderer\Image.cpp" />
     <ClCompile Include="renderer\Image9.cpp" />
     <ClCompile Include="renderer\IndexBuffer.cpp" />
@@ -308,6 +309,7 @@ copy "$(OutDir)libGLESv2.lib" "$(ProjectDir)..\..\lib\$(Configuration)\"
     <ClInclude Include="renderer\Fence11.h" />
     <ClInclude Include="renderer\Fence9.h" />
     <ClInclude Include="renderer\FenceImpl.h" />
+    <ClInclude Include="renderer\BufferStorage.h" />
     <ClInclude Include="renderer\generatemip.h" />
     <ClInclude Include="renderer\Image.h" />
     <ClInclude Include="renderer\Image11.h" />

src/libGLESv2/libGLESv2.vcxproj.filters

@@ -191,6 +191,9 @@
     <ClCompile Include="renderer\Fence11.cpp">
       <Filter>Renderer</Filter>
     </ClCompile>
+    <ClCompile Include="renderer\BufferStorage.cpp">
+      <Filter>Renderer</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="BinaryStream.h">
@@ -439,6 +442,9 @@
     <ClInclude Include="renderer\Fence11.h">
       <Filter>Renderer</Filter>
     </ClInclude>
+    <ClInclude Include="renderer\BufferStorage.h">
+      <Filter>Renderer</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <None Include="libGLESv2.def">

src/libGLESv2/renderer/BufferStorage.cpp

+//
+// Copyright (c) 2013 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// BufferStorage.cpp Defines the abstract BufferStorage class.
+
+#include "libGLESv2/renderer/BufferStorage.h"
+
+namespace rx
+{
+
+unsigned int BufferStorage::mNextSerial = 1;
+
+BufferStorage::BufferStorage()
+{
+    updateSerial();
+}
+
+BufferStorage::~BufferStorage()
+{
+}
+
+unsigned int BufferStorage::getSerial() const
+{
+    return mSerial;
+}
+
+void BufferStorage::updateSerial()
+{
+    mSerial = mNextSerial++;
+}
+
+void BufferStorage::markBufferUsage()
+{
+}
+
+}

src/libGLESv2/renderer/BufferStorage.h

+//
+// Copyright (c) 2013 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// BufferStorage.h Defines the abstract BufferStorage class.
+
+#ifndef LIBGLESV2_RENDERER_BUFFERSTORAGE_H_
+#define LIBGLESV2_RENDERER_BUFFERSTORAGE_H_
+
+#include "common/angleutils.h"
+
+namespace rx
+{
+
+class BufferStorage
+{
+  public:
+    BufferStorage();
+    virtual ~BufferStorage();
+
+    // The data returned is only guaranteed valid until next non-const method.
+    virtual void *getData() = 0;
+    virtual void setData(const void* data, unsigned int size, unsigned int offset) = 0;
+    virtual void clear() = 0;
+    virtual unsigned int getSize() const = 0;
+    virtual bool supportsDirectBinding() const = 0;
+    virtual void markBufferUsage();
+    unsigned int getSerial() const;
+
+  protected:
+    void updateSerial();
+
+  private:
+    DISALLOW_COPY_AND_ASSIGN(BufferStorage);
+
+    unsigned int mSerial;
+    static unsigned int mNextSerial;
+};
+
+}
+
+#endif // LIBGLESV2_RENDERER_BUFFERSTORAGE_H_