| | 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. |
| | 20 | class Graphic3d_IndexBuffer : public Graphic3d_Buffer |
| | 21 | { |
| | 22 | public: |
| | 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 | |
| | 51 | //! Allocates new empty index array |
| | 52 | bool InitInt32 (const Standard_Integer theNbElems) |
| | 53 | { |
| | 54 | return Init<int> (theNbElems); |
| | 55 | } |
| | 56 | |
| | 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 | |
| | 79 | public: |
| | 80 | |
| | 81 | DEFINE_STANDARD_RTTI_INLINE(Graphic3d_IndexBuffer,Graphic3d_Buffer) // Type definition |
| | 82 | |
| | 83 | }; |
| | 84 | |
| | 85 | DEFINE_STANDARD_HANDLE(Graphic3d_IndexBuffer, Graphic3d_Buffer) |
| | 86 | |
| | 87 | #endif // _Graphic3d_IndexBuffer_HeaderFile |
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