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*sizeof(float);
  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         unsigned comma;
  28         f=NODATA;
  29
  30         while(1)
  31         {
  32                 comma=str.find(',', start);
  33                 if(str.compare(start, comma-start, "VERTEX2"))
  34                         f=f,VERTEX2;
  35                 else if(str.compare(start, comma-start, "VERTEX3"))
  36                         f=f,VERTEX3;
  37                 else if(str.compare(start, comma-start, "VERTEX4"))
  38                         f=f,VERTEX4;
  39                 else if(str.compare(start, comma-start, "NORMAL3"))
  40                         f=f,NORMAL3;
  41                 else if(str.compare(start, comma-start, "TEXCOORD1"))
  42                         f=f,TEXCOORD1;
  43                 else if(str.compare(start, comma-start, "TEXCOORD2"))
  44                         f=f,TEXCOORD2;
  45                 else if(str.compare(start, comma-start, "TEXCOORD3"))
  46                         f=f,TEXCOORD3;
  47                 else if(str.compare(start, comma-start, "TEXCOORD4"))
  48                         f=f,TEXCOORD4;
  49                 else if(str.compare(start, comma-start, "COLOR4_UBYTE"))
  50                         f=f,COLOR4_UBYTE;
  51                 else if(str.compare(start, comma-start, "COLOR3_FLOAT"))
  52                         f=f,COLOR3_FLOAT;
  53                 else if(str.compare(start, comma-start, "COLOR4_FLOAT"))
  54                         f=f,COLOR4_FLOAT;
  55                 else
  56                 {
  57                         in.setstate(std::ios_base::failbit);
  58                         break;
  59                 }
  60                 start=comma+1;
  61                 if(comma==std::string::npos)
  62                         break;
  63         }
  64
  65         return in;
  66 }
  67
  68 } // namespace GL
  69 } // namespace Msp