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+/*
+ * Copyright 2009, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+// This file contains the declaration of the platform specific
+// VertexBufferStub and IndexBufferStub objects used by O3D
+
+#ifndef O3D_CONVERTER_EDGE_CROSS_BUFFER_STUB_H_
+#define O3D_CONVERTER_EDGE_CROSS_BUFFER_STUB_H_
+
+#include "base/basictypes.h"
+#include "base/scoped_ptr.h"
+#include "core/cross/buffer.h"
+
+namespace o3d {
+
+// VertexBufferStub is a wrapper around an Stub Vertex Buffer Object (VBO).
+// The buffer starts out empty.  Calling Allocate() will reserve video memory
+// for the buffer. Buffer contents are are updated by calling Lock() to get a
+// pointer to the memory allocated for the buffer, updating that data in place
+// and calling Unlock() to notify Stub that the edits are done.
+
+class VertexBufferStub : public VertexBuffer {
+ public:
+  explicit VertexBufferStub(ServiceLocator* service_locator)
+      : VertexBuffer(service_locator), locked_(false) {}
+  ~VertexBufferStub() {}
+
+ protected:
+  // Creates a Stub vertex buffer object of the specified size.
+  virtual bool ConcreteAllocate(size_t size_in_bytes);
+
+  // Frees the buffer.
+  virtual void ConcreteFree();
+
+  // Returns a pointer to the current contents of the buffer.  A matching
+  // call to Unlock is necessary to update the contents of the buffer.
+  virtual bool ConcreteLock(AccessMode access_mode, void** buffer_data);
+
+  // Notifies Stub that the buffer data has been updated.  Unlock is only
+  // valid if it follows a Lock operation.
+  virtual bool ConcreteUnlock();
+ private:
+  scoped_array<int8> buffer_;
+  bool locked_;
+
+  DISALLOW_COPY_AND_ASSIGN(VertexBufferStub);
+};
+
+// IndexBufferStub is a wrapper around a Stub Index Buffer Object.
+// The buffer starts out empty.  A call to Allocate() will create a stub
+// index buffer of the requested size.  Updates the to the contents of the
+// buffer are done via the Lock/Unlock calls.
+class IndexBufferStub : public IndexBuffer {
+ public:
+  explicit IndexBufferStub(ServiceLocator* service_locator)
+      : IndexBuffer(service_locator), locked_(false) {}
+  ~IndexBufferStub() {}
+
+ protected:
+  // Creates a OpenGL index buffer of the specified size.
+  virtual bool ConcreteAllocate(size_t size_in_bytes);
+
+  // Frees the buffer.
+  virtual void ConcreteFree();
+
+  // Returns a pointer to the current contents of the buffer.  After calling
+  // Lock, the contents of the buffer can be updated in place.
+  virtual bool ConcreteLock(AccessMode access_mode, void** buffer_data);
+
+  // Notifies OpenGL that the buffer data has been updated.  Unlock is only
+  // valid if it follows a Lock operation.
+  virtual bool ConcreteUnlock();
+ private:
+  scoped_array<int8> buffer_;
+  bool locked_;
+
+  DISALLOW_COPY_AND_ASSIGN(IndexBufferStub);
+};
+
+}  // namespace o3d
+
+
+#endif  // O3D_CONVERTER_EDGE_CROSS_BUFFER_STUB_H_