font.c
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/*
* (C)opyright MMIV-MMVI Anselm R. Garbe <garbeam at gmail dot com>
* See LICENSE file for license details.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <locale.h>
unsigned int
textwidth_l(BlitzFont *font, char *text, unsigned int len)
{
if(font->set) {
XRectangle r;
XmbTextExtents(font->set, text, len, nil, &r);
return r.width;
}
return XTextWidth(font->xfont, text, len);
}
unsigned int
textwidth(BlitzFont *font, char *text)
{
return blitz_textwidth_l(font, text, strlen(text));
}
void
loadfont(Blitz *blitz, BlitzFont *font)
{
char *fontname = font->fontstr;
char **missing = nil, *def = "?";
int n;
setlocale(LC_ALL, "");
if(font->set)
XFreeFontSet(blitz->dpy, font->set);
font->set = XCreateFontSet(blitz->dpy, fontname, &missing, &n, &def);
if(missing) {
while(n--)
fprintf(stderr, "liblitz: missing fontset: %s\n", missing[n]);
XFreeStringList(missing);
if(font->set) {
XFreeFontSet(blitz->dpy, font->set);
font->set = nil;
}
}
if(font->set) {
XFontSetExtents *font_extents;
XFontStruct **xfonts;
char **font_names;
unsigned int i;
font->ascent = font->descent = 0;
font_extents = XExtentsOfFontSet(font->set);
n = XFontsOfFontSet(font->set, &xfonts, &font_names);
for(i = 0, font->ascent = 0, font->descent = 0; i < n; i++) {
if(font->ascent < (*xfonts)->ascent)
font->ascent = (*xfonts)->ascent;
if(font->descent < (*xfonts)->descent)
font->descent = (*xfonts)->descent;
xfonts++;
}
}
else {
if(font->xfont)
XFreeFont(blitz->dpy, font->xfont);
font->xfont = nil;
font->xfont = XLoadQueryFont(blitz->dpy, fontname);
if (!font->xfont) {
fontname = "fixed";
font->xfont = XLoadQueryFont(blitz->dpy, fontname);
}
if (!font->xfont) {
fprintf(stderr, "%s", "liblitz: error, cannot load 'fixed' font\n");
exit(1);
}
font->ascent = font->xfont->ascent;
font->descent = font->xfont->descent;
}
}