0027860: Visualization - clean up Transformation Persistence API
[occt.git] / src / Graphic3d / Graphic3d_IndexBuffer.hxx
CommitLineData
871fa103 1// Copyright (c) 2014 OPEN CASCADE SAS
2//
3// This file is part of Open CASCADE Technology software library.
4//
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.
10//
11// Alternatively, this file may be used under the terms of Open CASCADE
12// commercial license or contractual agreement.
13
14#ifndef _Graphic3d_IndexBuffer_HeaderFile
15#define _Graphic3d_IndexBuffer_HeaderFile
16
17#include <Graphic3d_Buffer.hxx>
18
19//! Index buffer.
20class Graphic3d_IndexBuffer : public Graphic3d_Buffer
21{
22public:
23
24 //! Empty constructor.
25 Graphic3d_IndexBuffer (const Handle(NCollection_BaseAllocator)& theAlloc)
26 : Graphic3d_Buffer (theAlloc) {}
27
28 //! Allocates new empty index array
29 template<typename IndexType_t>
30 bool Init (const Standard_Integer theNbElems)
31 {
32 release();
33 Stride = sizeof(IndexType_t);
34 if (Stride != sizeof(unsigned short)
35 && Stride != sizeof(unsigned int))
36 {
37 return false;
38 }
39
40 NbElements = theNbElems;
41 NbAttributes = 0;
42 if (NbElements != 0
43 && !Allocate (size_t(Stride) * size_t(NbElements)))
44 {
45 release();
46 return false;
47 }
48 return true;
49 }
50
4a535d3f 51 //! Allocates new empty index array
52 bool InitInt32 (const Standard_Integer theNbElems)
53 {
54 return Init<int> (theNbElems);
55 }
56
871fa103 57 //! Access index at specified position
58 Standard_Integer Index (const Standard_Integer theIndex) const
59 {
60 return Stride == sizeof(unsigned short)
61 ? Standard_Integer(Value<unsigned short> (theIndex))
62 : Standard_Integer(Value<unsigned int> (theIndex));
63 }
64
65 //! Change index at specified position
66 void SetIndex (const Standard_Integer theIndex,
67 const Standard_Integer theValue)
68 {
69 if (Stride == sizeof(unsigned short))
70 {
71 ChangeValue<unsigned short> (theIndex) = (unsigned short )theValue;
72 }
73 else
74 {
75 ChangeValue<unsigned int> (theIndex) = (unsigned int )theValue;
76 }
77 }
78
7d3e64ef 79public:
80
92efcf78 81 DEFINE_STANDARD_RTTI_INLINE(Graphic3d_IndexBuffer,Graphic3d_Buffer) // Type definition
7d3e64ef 82
871fa103 83};
84
7d3e64ef 85DEFINE_STANDARD_HANDLE(Graphic3d_IndexBuffer, Graphic3d_Buffer)
871fa103 86
87#endif // _Graphic3d_IndexBuffer_HeaderFile