font.c

   1 /*
   2  * (C)opyright MMIV-MMVI Anselm R. Garbe <garbeam at gmail dot com>
   3  * See LICENSE file for license details.
   4  */
   5
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8 #include <string.h>
   9 #include <locale.h>
  10
  11 unsigned int
  12 textwidth_l(BlitzFont *font, char *text, unsigned int len)
  13 {
  14         if(font->set) {
  15                 XRectangle r;
  16                 XmbTextExtents(font->set, text, len, nil, &r);
  17                 return r.width;
  18         }
  19         return XTextWidth(font->xfont, text, len);
  20 }
  21
  22 unsigned int
  23 textwidth(BlitzFont *font, char *text)
  24 {
  25         return blitz_textwidth_l(font, text, strlen(text));
  26 }
  27
  28 void
  29 loadfont(Blitz *blitz, BlitzFont *font)
  30 {
  31         char *fontname = font->fontstr;
  32         char **missing = nil, *def = "?";
  33         int n;
  34
  35         setlocale(LC_ALL, "");
  36         if(font->set)
  37                 XFreeFontSet(blitz->dpy, font->set);
  38         font->set = XCreateFontSet(blitz->dpy, fontname, &missing, &n, &def);
  39         if(missing) {
  40                 while(n--)
  41                         fprintf(stderr, "missing fontset: %s\n", missing[n]);
  42                 XFreeStringList(missing);
  43                 if(font->set) {
  44                         XFreeFontSet(blitz->dpy, font->set);
  45                         font->set = nil;
  46                 }
  47         }
  48         if(font->set) {
  49                 XFontSetExtents *font_extents;
  50                 XFontStruct **xfonts;
  51                 char **font_names;
  52                 unsigned int i;
  53
  54                 font->ascent = font->descent = 0;
  55                 font_extents = XExtentsOfFontSet(font->set);
  56                 n = XFontsOfFontSet(font->set, &xfonts, &font_names);
  57                 for(i = 0, font->ascent = 0, font->descent = 0; i < n; i++) {
  58                         if(font->ascent < (*xfonts)->ascent)
  59                                 font->ascent = (*xfonts)->ascent;
  60                         if(font->descent < (*xfonts)->descent)
  61                                 font->descent = (*xfonts)->descent;
  62                         xfonts++;
  63                 }
  64         }
  65         else {
  66                 if(font->xfont)
  67                         XFreeFont(blitz->dpy, font->xfont);
  68                 font->xfont = nil;
  69                 font->xfont = XLoadQueryFont(blitz->dpy, fontname);
  70                 if (!font->xfont) {
  71                         fontname = "fixed";
  72                         font->xfont = XLoadQueryFont(blitz->dpy, fontname);
  73                 }
  74                 if (!font->xfont) {
  75                         fprintf(stderr, "%s", "error, cannot load 'fixed' font\n");
  76                         exit(1);
  77                 }
  78                 font->ascent = font->xfont->ascent;
  79                 font->descent = font->xfont->descent;
  80         }
  81 }