src/glut/glx/glut_bwidth.c

   1
   2 /* Copyright (c) Mark J. Kilgard, 1994. */
   3
   4 /* This program is freely distributable without licensing fees
   5    and is provided without guarantee or warrantee expressed or
   6    implied. This program is -not- in the public domain. */
   7
   8 #include "glutint.h"
   9 #include "glutbitmap.h"
  10
  11 /* CENTRY */
  12 int GLUTAPIENTRY
  13 glutBitmapWidth(GLUTbitmapFont font, int c)
  14 {
  15   BitmapFontPtr fontinfo;
  16   const BitmapCharRec *ch;
  17
  18 #if defined(_WIN32) || defined(GLUT_IMPORT_LIB)
  19   fontinfo = (BitmapFontPtr) __glutFont(font);
  20 #else
  21   fontinfo = (BitmapFontPtr) font;
  22 #endif
  23
  24   if (c < fontinfo->first || c >= fontinfo->first + fontinfo->num_chars)
  25     return 0;
  26   ch = fontinfo->ch[c - fontinfo->first];
  27   if (ch)
  28     return ch->advance;
  29   else
  30     return 0;
  31 }
  32
  33 int GLUTAPIENTRY
  34 glutBitmapLength(GLUTbitmapFont font, const unsigned char *string)
  35 {
  36   int c, length;
  37   BitmapFontPtr fontinfo;
  38   const BitmapCharRec *ch;
  39
  40 #if defined(_WIN32) || defined(GLUT_IMPORT_LIB)
  41   fontinfo = (BitmapFontPtr) __glutFont(font);
  42 #else
  43   fontinfo = (BitmapFontPtr) font;
  44 #endif
  45
  46   length = 0;
  47   for (; *string != '\0'; string++) {
  48     c = *string;
  49     if (c >= fontinfo->first && c < fontinfo->first + fontinfo->num_chars) {
  50       ch = fontinfo->ch[c - fontinfo->first];
  51       if (ch)
  52         length += ch->advance;
  53     }
  54   }
  55   return length;
  56 }
  57
  58 /* ENDCENTRY */