F:/My Projects/LSEngine/Modules/LSGraphicsLib/Src/IndexBuffer/LSGIndexBuffer.h

#ifndef __LSG_INDEXBUFFER_H__
#define __LSG_INDEXBUFFER_H__

#include "../LSGGraphicsLib.h"
#include "../TriangleStrips/LSGTriangleStripper.h"
#include "../VertexBuffer/LSGVertexBuffer.h"
#ifdef LSG_DX9
#include "../DirectX/LSGDirectX9IndexBuffer.h"
#endif  // #ifdef LSG_DX9
#ifdef LSG_DX10
#include "../DirectX/LSGDirectX10IndexBuffer.h"
#endif  // #ifdef LSG_DX10
#ifdef LSG_DX11
#include "../DirectX/LSGDirectX11IndexBuffer.h"
#endif  // #ifdef LSG_DX11
#ifdef LSG_OGLES
#include "../OpenGLES/LSGOpenGlEsIndexBuffer.h"
#endif  // #ifdef LSG_OGLES
#ifdef LSG_OGL
#include "../OpenGL/LSGOpenGlIndexBuffer.h"
#endif  // #ifdef LSG_OGL
#include "LSGIndexBufferBase.h"

namespace lsg {

        class CIndexBuffer : protected
#ifdef LSG_OGL
                COpenGlIndexBuffer
#endif  // #ifdef LSG_OGL
#ifdef LSG_OGLES
                COpenGlEsIndexBuffer
#endif  // #ifdef LSG_OGLES
#ifdef LSG_DX9
                CDirectX9IndexBuffer
#endif  // #ifdef LSG_DX9
#ifdef LSG_DX10
                CDirectX10IndexBuffer
#endif  // #ifdef LSG_DX10
#ifdef LSG_DX11
                CDirectX11IndexBuffer
#endif  // #ifdef LSG_DX11

        {
        public :
                // == Various constructors.
                LSE_CALLCTOR                                                            CIndexBuffer();
                LSE_CALLCTOR                                                            ~CIndexBuffer();


                // == Operators.
                CIndexBuffer & LSE_CALL                                         operator = ( const CIndexBuffer &_ibOther );


                // == Functions.
                LSBOOL LSE_CALL                                                         CreateIndexBuffer( LSUINT32 _ui32InitialElements, LSUINT32 _ui32Usage, LSBOOL _bUse32Bits = false, CAllocator * _paAllocator = NULL );

                LSBOOL LSE_CALL                                                         CreateIndexBufferFromVertexBuffer( CVertexBuffer &_vbBuffer, LSUINT32 _ui32Usage, CAllocator * _paAllocator = NULL );

                LSBOOL LSE_CALL                                                         CreateTriangleStripGrid( LSUINT32 _ui32VerticesPerRow, LSUINT32 _ui32Rows,
                        LSUINT32 _ui32Usage, CAllocator * _paAllocator = NULL );


                LSVOID LSE_CALL                                                         SetAllocator( CAllocator * _paAllocator );

                LSBOOL LSE_CALL                                                         MakeTriangleStrip();

                LSVOID LSE_CALL                                                         Reset();

                LSBOOL LSE_CALL                                                         Finalize();

                LSBOOL LSE_CALL                                                         Lock();

                LSBOOL LSE_CALL                                                         UnLock();

                LSBOOL LSE_CALL                                                         PushIndex( LSUINT32 _ui32Index );

                LSE_INLINE LSBOOL LSE_CALL                                      SetIndex( LSUINT32 _ui32IndexIndex, LSUINT32 _ui32Value );

                LSE_INLINE LSUINT32 LSE_CALL                            TotalIndices() const;

                LSE_INLINE const LSVOID * LSE_CALL                      GetIndices() const;

                LSE_INLINE const LSUINT32 * LSE_CALL            Get32BitIndices() const;

                LSE_INLINE const LSUINT16 * LSE_CALL            Get16BitIndices() const;

                LSE_INLINE LSBOOL LSE_CALL                                      IndicesAre32Bits() const;

        protected :
                // == Types.
                typedef struct LSG_UNIQUE_VB_ELEMENT {
                        LSVOID *                                                                pvElement;

                        LSUINT32                                                                ui32Size;


                        // == Operators.
                        LSBOOL LSE_CALL                                                 operator < ( const LSG_UNIQUE_VB_ELEMENT &_uveOther ) const;

                        LSBOOL LSE_CALL                                                 operator == ( const LSG_UNIQUE_VB_ELEMENT &_uveOther ) const;
                } * LPLSG_UNIQUE_VB_ELEMENT, * const LPCLSG_UNIQUE_VB_ELEMENT;

                // == Members.
                

                // == Functions.
                LSBOOL LSE_CALL                                                         UpgradeList();

                LSE_INLINE LSVOID LSE_CALL                                      Render( const CVertexBuffer &_vbBuffer, LSUINT32 _ui32TotalPrimitives ) const;

        private :
#ifdef LSG_OGL
                typedef COpenGlIndexBuffer                                      Parent;
#endif  // #ifdef LSG_OGL
#ifdef LSG_OGLES
                typedef COpenGlEsIndexBuffer                            Parent;
#endif  // #ifdef LSG_OGLES
#ifdef LSG_DX9
                typedef CDirectX9IndexBuffer                            Parent;
#endif  // #ifdef LSG_DX9
#ifdef LSG_DX10
                typedef CDirectX10IndexBuffer                           Parent;
#endif  // #ifdef LSG_DX10
#ifdef LSG_DX11
                typedef CDirectX11IndexBuffer                           Parent;
#endif  // #ifdef LSG_DX11

                friend class                                                            CFnd;
        };


        // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
        // DEFINITIONS
        // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
        // == Functions.
        LSE_INLINE LSBOOL LSE_CALL CIndexBuffer::SetIndex( LSUINT32 _ui32IndexIndex, LSUINT32 _ui32Value ) {
                register LSUINT32 ui32Total = m_vBuffer.Length() / m_ui32ElementSize;
                if ( _ui32IndexIndex >= ui32Total ) { return false; }

                // If the index is above 0xFFFF, we need 32 bits to hold it.
                if ( _ui32Value & 0xFFFF0000UL ) {
                        //      If not using 32 bits already, upgrade the list.
                        if ( m_ui32ElementSize != sizeof( LSUINT32 ) ) {
                                if ( !UpgradeList() ) { return false; }
                        }
                }
                if ( m_ui32ElementSize == sizeof( LSUINT32 ) ) {
                        register LSUINT32 * pui32Dest = reinterpret_cast<LSUINT32 *>(&m_vBuffer[0]) + _ui32IndexIndex;
                        (*pui32Dest) = _ui32Value;
                }
                else {
                        register LSUINT16 * pui16Dest = reinterpret_cast<LSUINT16 *>(&m_vBuffer[0]) + _ui32IndexIndex;
                        (*pui16Dest) = static_cast<LSUINT16>(_ui32Value);
                }
                return true;
        }

        LSE_INLINE LSUINT32 LSE_CALL CIndexBuffer::TotalIndices() const {
                return m_ui32TotalIndices;
        }

        LSE_INLINE const LSVOID * LSE_CALL CIndexBuffer::GetIndices() const {
                if ( m_ui32LockCount == 0UL || !m_vBuffer.Length() ) { return NULL; }
                return &m_vBuffer[0];
        }

        LSE_INLINE const LSUINT32 * LSE_CALL CIndexBuffer::Get32BitIndices() const {
                return static_cast<const LSUINT32 *>(GetIndices());
        }

        LSE_INLINE const LSUINT16 * LSE_CALL CIndexBuffer::Get16BitIndices() const {
                return static_cast<const LSUINT16 *>(GetIndices());
        }

        LSE_INLINE LSBOOL LSE_CALL CIndexBuffer::IndicesAre32Bits() const {
                return m_ui32ElementSize == sizeof( LSUINT32 );
        }

        LSE_INLINE LSVOID LSE_CALL CIndexBuffer::Render( const CVertexBuffer &_vbBuffer, LSUINT32 _ui32TotalPrimitives ) const {
                Parent::RenderApi( _vbBuffer, _ui32TotalPrimitives );
        }

}       // namespace lsg

#endif  // __LSG_INDEXBUFFER_H__