src/libs/glut/glut_bwidth.c

   1 /*
   2  * Copyright 1994-1997 Mark Kilgard, All rights reserved.
   3  * Distributed under the terms of the MIT License.
   4  *
   5  * Authors:
   6  *      Mark Kilgard
   7  */
   8
   9
  10 #include "glutint.h"
  11 #include "glutbitmap.h"
  12
  13
  14 /* CENTRY */
  15 int APIENTRY
  16 glutBitmapWidth(GLUTbitmapFont font, int c)
  17 {
  18   BitmapFontPtr fontinfo;
  19   const BitmapCharRec *ch;
  20
  21 #ifdef _WIN32
  22   fontinfo = (BitmapFontPtr) __glutFont(font);
  23 #else
  24   fontinfo = (BitmapFontPtr) font;
  25 #endif
  26
  27   if (c < fontinfo->first || c >= fontinfo->first + fontinfo->num_chars)
  28     return 0;
  29   ch = fontinfo->ch[c - fontinfo->first];
  30   if (ch)
  31     return ch->advance;
  32   else
  33     return 0;
  34 }
  35
  36 int APIENTRY
  37 glutBitmapLength(GLUTbitmapFont font, const unsigned char *string)
  38 {
  39   int c, length;
  40   BitmapFontPtr fontinfo;
  41   const BitmapCharRec *ch;
  42
  43 #ifdef _WIN32
  44   fontinfo = (BitmapFontPtr) __glutFont(font);
  45 #else
  46   fontinfo = (BitmapFontPtr) font;
  47 #endif
  48
  49   length = 0;
  50   for (; *string != '\0'; string++) {
  51     c = *string;
  52     if (c >= fontinfo->first && c < fontinfo->first + fontinfo->num_chars) {
  53       ch = fontinfo->ch[c - fontinfo->first];
  54       if (ch)
  55         length += ch->advance;
  56     }
  57   }
  58   return length;
  59 }
  60
  61 /* ENDCENTRY */