nevrax.org : docs

00001 
+00007 /* Copyright, 2001 Nevrax Ltd.
+00008  *
+00009  * This file is part of NEVRAX NEL.
+00010  * NEVRAX NEL is free software; you can redistribute it and/or modify
+00011  * it under the terms of the GNU General Public License as published by
+00012  * the Free Software Foundation; either version 2, or (at your option)
+00013  * any later version.
+00014 
+00015  * NEVRAX NEL is distributed in the hope that it will be useful, but
+00016  * WITHOUT ANY WARRANTY; without even the implied warranty of
+00017  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+00018  * General Public License for more details.
+00019 
+00020  * You should have received a copy of the GNU General Public License
+00021  * along with NEVRAX NEL; see the file COPYING. If not, write to the
+00022  * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+00023  * MA 02111-1307, USA.
+00024  */
+00025 
+00026 #ifndef NL_LANDSCAPEVB_ALLOCATOR_H
+00027 #define NL_LANDSCAPEVB_ALLOCATOR_H
+00028 
+00029 #include "nel/misc/types_nl.h"
+00030 #include "nel/misc/smart_ptr.h"
+00031 #include "3d/tessellation.h"
+00032 #include "3d/vertex_buffer.h"
+00033 
+00034 
+00035 namespace NL3D 
+00036 {
+00037 
+00038 
+00039 class   IDriver;
+00040 
+00041 
+00042 // ***************************************************************************
+00043 // Landscape VertexProgram: Position of vertices in VertexBuffer.
+00044 #define NL3D_LANDSCAPE_VPPOS_STARTPOS           (CVertexBuffer::Position)
+00045 #define NL3D_LANDSCAPE_VPPOS_TEX0                       (CVertexBuffer::TexCoord0)
+00046 #define NL3D_LANDSCAPE_VPPOS_TEX1                       (CVertexBuffer::TexCoord1)
+00047 #define NL3D_LANDSCAPE_VPPOS_TEX2                       (CVertexBuffer::TexCoord5)
+00048 #define NL3D_LANDSCAPE_VPPOS_GEOMINFO           (CVertexBuffer::TexCoord2)
+00049 #define NL3D_LANDSCAPE_VPPOS_DELTAPOS           (CVertexBuffer::TexCoord3)
+00050 #define NL3D_LANDSCAPE_VPPOS_ALPHAINFO          (CVertexBuffer::TexCoord4)
+00051 
+00052 
+00053 // ***************************************************************************
+00060 class CLandscapeVBAllocator
+00061 {
+00062 public:
+00063 
+00064         enum    TType   {Far0, Far1, Tile};
+00065 
+00067         CLandscapeVBAllocator(TType type);
+00068         ~CLandscapeVBAllocator();
+00069 
+00079         void                    updateDriver(IDriver *driver);
+00080 
+00081 
+00082         // delete all VB, and free driver ressources (if RefPtr driver not deleted). clear list too.
+00083         void                    clear();
+00084 
+00085 
+00087         // @{
+00088 
+00089         // true if reallocationOccurs during a allocateVertex() or a setDriver().
+00090         // a buildVBInfo() should be done and ALL data are lost, so all VB must be rewrited.
+00091         bool                    reallocationOccurs() const {return _ReallocationOccur;}
+00092         void                    resetReallocation();
+00093 
+00094         // Allocate free vertices in VB. (AGP or RAM). work with locked or unlocked buffer.
+00095         // NB: if reallocationOccurs(), then ALL data are lost.
+00096         uint                    allocateVertex();
+00097         // Delete free vertices in VB. (AGP or RAM).
+00098         void                    deleteVertex(uint vid);
+00099         // @}
+00100 
+00101 
+00103         // @{
+00107         void                    lockBuffer(CFarVertexBufferInfo &farVB);
+00108         void                    lockBuffer(CNearVertexBufferInfo &tileVB);
+00109         void                    unlockBuffer();
+00110         bool                    bufferLocked() const {return _BufferLocked;}
+00111 
+00116         void                    activate(uint vpId);
+00117         // @}
+00118 
+00119 
+00120 // ******************
+00121 private:
+00122 
+00123         // For Debug.
+00124         struct  CVertexInfo
+00125         {
+00126                 bool    Free;
+00127         };
+00128 
+00129 private:
+00130         TType                                           _Type;
+00131         
+00132         bool                                            _ReallocationOccur;
+00133         // List of vertices free.
+00134         std::vector<uint>                       _VertexFreeMemory;
+00135         std::vector<CVertexInfo>        _VertexInfos;
+00136         uint                                            _NumVerticesAllocated;
+00137 
+00138 
+00140         // @{
+00141 
+00142         // a refPtr on the driver, to delete VBuffer Hard at clear().
+00143         NLMISC::CRefPtr<IDriver>                        _Driver;
+00144         // tell if VBHard is possible.
+00145         bool                                                            _VBHardOk;
+00146         CVertexBuffer                                           _VB;
+00147         NLMISC::CRefPtr<IVertexBufferHard>      _VBHard;
+00148         bool                                                            _BufferLocked;
+00149 
+00150         /* try to create a vertexBufferHard or a vbSoft if not possible.
+00151                 After this call, the vertexBufferHard may be NULL.
+00152         */
+00153         void                            deleteVertexBuffer();
+00154         void                            allocateVertexBuffer(uint32 numVertices);
+00155         // @}
+00156 
+00157 
+00159         // @{
+00160         enum    {MaxVertexProgram= 2,};
+00161         // Vertex Program , NULL if not enabled.
+00162         CVertexProgram          *_VertexProgram[MaxVertexProgram];
+00163         void                            deleteVertexProgram();
+00164         void                            setupVBFormatAndVertexProgram(bool withVertexProgram);
+00165         // @}
+00166 
+00167 };
+00168 
+00169 
+00170 } // NL3D
+00171 
+00172 
+00173 #endif // NL_LANDSCAPEVB_ALLOCATOR_H
+00174 
+00175 /* End of landscapevb_allocator.h */
+