/*

-----------------------------------------------------------------------------

This source file is part of OGRE

    (Object-oriented Graphics Rendering Engine)

For the latest info, see http://www.ogre3d.org/

Copyright (c) 2000-2014 Torus Knot Software Ltd

Permission is hereby granted, free of charge, to any person obtaining a copy

of this software and associated documentation files (the "Software"), to deal

in the Software without restriction, including without limitation the rights

to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

copies of the Software, and to permit persons to whom the Software is

furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in

all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

THE SOFTWARE.

-----------------------------------------------------------------------------

*/

#ifndef __HardwareIndexBuffer__

#define __HardwareIndexBuffer__

// Precompiler options

#include "OgrePrerequisites.h"

#include "OgreHardwareBuffer.h"

#include "OgreSharedPtr.h"

namespace Ogre {

    class HardwareBufferManagerBase;

    /** \addtogroup Core

    *  @{

    */

    /** \addtogroup RenderSystem

    *  @{

    */

    /** Specialisation of HardwareBuffer for vertex index buffers, still abstract. */

    class _OgreExport HardwareIndexBuffer final : public HardwareBuffer

    {

        public:

            enum IndexType : uint8 {

                IT_16BIT,

                IT_32BIT

            };

        private:

            IndexType mIndexType;

            uint8 mIndexSize;

            HardwareBufferManagerBase* mMgr;

            uint32 mNumIndexes;

        public:

            /// Should be called by HardwareBufferManager

            HardwareIndexBuffer(HardwareBufferManagerBase* mgr, IndexType idxType, size_t numIndexes,

                                Usage usage, bool useShadowBuffer);

            HardwareIndexBuffer(HardwareBufferManagerBase* mgr, IndexType idxType, size_t numIndexes,

                                HardwareBuffer* delegate);

            ~HardwareIndexBuffer();

            /// Return the manager of this buffer, if any

            HardwareBufferManagerBase* getManager() const { return mMgr; }

            /// Get the type of indexes used in this buffer

            IndexType getType(void) const { return mIndexType; }

            /// Get the number of indexes in this buffer

            uint32 getNumIndexes(void) const { return mNumIndexes; }

            /// Get the size in bytes of each index

            uint8 getIndexSize(void) const { return mIndexSize; }

            static size_t indexSize(IndexType type) { return type == IT_16BIT ? sizeof(uint16) : sizeof(uint32); }

            // NB subclasses should override lock, unlock, readData, writeData

    };

    /// @deprecated use HardwareBufferLockGuard directly

    OGRE_DEPRECATED typedef HardwareBufferLockGuard HardwareIndexBufferLockGuard;

    /** @} */

    /** @} */

}

#endif