1 // Copyright (c) 2014 OPEN CASCADE SAS
3 // This file is part of Open CASCADE Technology software library.
5 // This library is free software; you can redistribute it and/or modify it under
6 // the terms of the GNU Lesser General Public License version 2.1 as published
7 // by the Free Software Foundation, with special exception defined in the file
8 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
9 // distribution for complete text of the license and disclaimer of any warranty.
11 // Alternatively, this file may be used under the terms of Open CASCADE
12 // commercial license or contractual agreement.
14 #ifndef _Graphic3d_IndexBuffer_HeaderFile
15 #define _Graphic3d_IndexBuffer_HeaderFile
17 #include <Graphic3d_Buffer.hxx>
20 class Graphic3d_IndexBuffer : public Graphic3d_Buffer
24 //! Empty constructor.
25 Graphic3d_IndexBuffer (const Handle(NCollection_BaseAllocator)& theAlloc)
26 : Graphic3d_Buffer (theAlloc) {}
28 //! Allocates new empty index array
29 template<typename IndexType_t>
30 bool Init (const Standard_Integer theNbElems)
33 Stride = sizeof(IndexType_t);
34 if (Stride != sizeof(unsigned short)
35 && Stride != sizeof(unsigned int))
40 NbElements = theNbElems;
43 && !Allocate (size_t(Stride) * size_t(NbElements)))
51 //! Access index at specified position
52 Standard_Integer Index (const Standard_Integer theIndex) const
54 return Stride == sizeof(unsigned short)
55 ? Standard_Integer(Value<unsigned short> (theIndex))
56 : Standard_Integer(Value<unsigned int> (theIndex));
59 //! Change index at specified position
60 void SetIndex (const Standard_Integer theIndex,
61 const Standard_Integer theValue)
63 if (Stride == sizeof(unsigned short))
65 ChangeValue<unsigned short> (theIndex) = (unsigned short )theValue;
69 ChangeValue<unsigned int> (theIndex) = (unsigned int )theValue;
75 DEFINE_STANDARD_RTTI(Graphic3d_IndexBuffer) // Type definition
79 DEFINE_STANDARD_HANDLE(Graphic3d_IndexBuffer, Graphic3d_Buffer)
81 #endif // _Graphic3d_IndexBuffer_HeaderFile