source/vertexformat.cpp

   1 /* $Id$
   2
   3 This file is part of libmspgl
   4 Copyright © 2007  Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include "vertexformat.h"
   9
  10 namespace Msp {
  11 namespace GL {
  12
  13 uint get_stride(VertexFormat f)
  14 {
  15         uint stride=0;
  16         for(uint fmt=f; fmt; fmt>>=4)
  17                 stride+=(fmt&3)+1;
  18         return stride;
  19 }
  20
  21 std::istream &operator>>(std::istream &in, VertexFormat &f)
  22 {
  23         std::string str;
  24         in>>str;
  25
  26         unsigned start=0;
  27         f=NODATA;
  28
  29         while(1)
  30         {
  31                 unsigned underscore=str.find('_', start);
  32                 if(!str.compare(start, underscore-start, "VERTEX2"))
  33                         f=(f,VERTEX2);
  34                 else if(!str.compare(start, underscore-start, "VERTEX3"))
  35                         f=(f,VERTEX3);
  36                 else if(!str.compare(start, underscore-start, "VERTEX4"))
  37                         f=(f,VERTEX4);
  38                 else if(!str.compare(start, underscore-start, "NORMAL3"))
  39                         f=(f,NORMAL3);
  40                 else if(!str.compare(start, underscore-start, "TEXCOORD1"))
  41                         f=(f,TEXCOORD1);
  42                 else if(!str.compare(start, underscore-start, "TEXCOORD2"))
  43                         f=(f,TEXCOORD2);
  44                 else if(!str.compare(start, underscore-start, "TEXCOORD3"))
  45                         f=(f,TEXCOORD3);
  46                 else if(!str.compare(start, underscore-start, "TEXCOORD4"))
  47                         f=(f,TEXCOORD4);
  48                 else if(!str.compare(start, underscore-start, "COLOR4UB"))
  49                         f=(f,COLOR4_UBYTE);
  50                 else if(!str.compare(start, underscore-start, "COLOR3F"))
  51                         f=(f,COLOR3_FLOAT);
  52                 else if(!str.compare(start, underscore-start, "COLOR4F"))
  53                         f=(f,COLOR4_FLOAT);
  54                 else
  55                 {
  56                         in.setstate(std::ios_base::failbit);
  57                         break;
  58                 }
  59
  60                 if(underscore==std::string::npos)
  61                         break;
  62                 start=underscore+1;
  63         }
  64
  65         return in;
  66 }
  67
  68 } // namespace GL
  69 } // namespace Msp