#ifndef _MPxIndexBufferMutator
#define _MPxIndexBufferMutator
//-
// ==========================================================================
// Copyright (C) 2012 Autodesk, Inc., and/or its licensors.  All
// rights reserved.
//
// The coded instructions, statements, computer programs, and/or related
// material (collectively the "Data") in these files contain unpublished
// information proprietary to Autodesk, Inc. ("Autodesk") and/or its
// licensors,  which is protected by U.S. and Canadian federal copyright law
// and by international treaties.
//
// The Data may not be disclosed or distributed to third parties or be
// copied or duplicated, in whole or in part, without the prior written
// consent of Autodesk.
//
// The copyright notices in the Software and this entire statement,
// including the above license grant, this restriction and the following
// disclaimer, must be included in all copies of the Software, in whole
// or in part, and all derivative works of the Software, unless such copies
// or derivative works are solely in the form of machine-executable object
// code generated by a source language processor.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND.
// AUTODESK DOES NOT MAKE AND HEREBY DISCLAIMS ANY EXPRESS OR IMPLIED
// WARRANTIES INCLUDING, BUT NOT LIMITED TO, THE WARRANTIES OF
// NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE,
// OR ARISING FROM A COURSE OF DEALING, USAGE, OR TRADE PRACTICE. IN NO
// EVENT WILL AUTODESK AND/OR ITS LICENSORS BE LIABLE FOR ANY LOST
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// ==========================================================================
//+
//
// CLASS: MPxVertexBufferProvider
//
// ****************************************************************************


#if defined __cplusplus

// ****************************************************************************
// INCLUDED HEADER FILES

#include <maya/MStatus.h>
#include <maya/MHWGeometry.h>
#include <maya/MDagPath.h>
#include <maya/MViewport2Renderer.h>
#include <maya/MComponentDataIndexing.h>

// ****************************************************************************
// DECLARATIONS

class MString;
class MUserData;

// ****************************************************************************
// NAMESPACE

namespace MHWRender
{

class MDrawContext;
class MRenderItemList;

// ****************************************************************************
// CLASS DECLARATION (MPxIndexBufferMutator)

//! \ingroup OpenMayaRender MPx
//! \brief Base class for user defined index buffer mutators.
/*!

Implementations of MPxIndexBufferMutator must be registered with Maya through
MDrawRegistry.

MPxIndexBufferMutators are registered with a unique mutator type name.  
The name signifies the name of the custom index buffer the mutator can produce.  
When an MPxShaderOverride or custom renderer uses an effect with custom index buffer 
mutator they can provide a MIndexBufferDescriptor with the desired mutator name.
A registered MPxIndexBufferMutator will be used to mutate the existing index buffer.
*/

class OPENMAYARENDER_EXPORT MPxIndexBufferMutator
{
public:

    MPxIndexBufferMutator();
    virtual ~MPxIndexBufferMutator();

    virtual MGeometry::Primitive mutateIndexing(const MHWRender::MComponentDataIndexingList& sourceIndexBuffers,
		const MVertexBufferArray &vertexBuffers,
        MIndexBuffer& indexBuffer,
		int& primitiveStride) const=0;

    static	const char*	className();
};

} // namespace MHWRender

#endif /* __cplusplus */
#endif /* _MPxIndexBufferMutator */