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 //! Allocates new empty index array
52 bool InitInt32 (const Standard_Integer theNbElems)
54 return Init<int> (theNbElems);
57 //! Access index at specified position
58 Standard_Integer Index (const Standard_Integer theIndex) const
60 return Stride == sizeof(unsigned short)
61 ? Standard_Integer(Value<unsigned short> (theIndex))
62 : Standard_Integer(Value<unsigned int> (theIndex));
65 //! Change index at specified position
66 void SetIndex (const Standard_Integer theIndex,
67 const Standard_Integer theValue)
69 if (Stride == sizeof(unsigned short))
71 ChangeValue<unsigned short> (theIndex) = (unsigned short )theValue;
75 ChangeValue<unsigned int> (theIndex) = (unsigned int )theValue;
81 DEFINE_STANDARD_RTTI_INLINE(Graphic3d_IndexBuffer,Graphic3d_Buffer) // Type definition
85 DEFINE_STANDARD_HANDLE(Graphic3d_IndexBuffer, Graphic3d_Buffer)
87 #endif // _Graphic3d_IndexBuffer_HeaderFile