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71 lines
1.6 KiB
C
71 lines
1.6 KiB
C
/* gapcalc - calculate height of given font
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* Copyright (C) 2007 by Robert Manea <rob.manea@gmail.com>
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*
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* Compile with: cc -lX11 -o gapcalc gapcalc.c
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*/
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#include<stdio.h>
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#include<stdlib.h>
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#include<stdarg.h>
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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void
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eprint(const char *errstr, ...) {
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va_list ap;
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va_start(ap, errstr);
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vfprintf(stderr, errstr, ap);
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va_end(ap);
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exit(EXIT_FAILURE);
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}
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int
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main(int argc, char *argv[]) {
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Display *dpy;
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XFontStruct *xfont;
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XFontSet set;
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char *def, **missing;
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char *fontstr;
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int i, n, ascent, descent;
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if(argc < 2)
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eprint("Usage: gapcalc <font>\n");
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if(!(dpy = XOpenDisplay(0)))
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eprint("fatal: cannot open display\n");
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fontstr = argv[1];
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missing = NULL;
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set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
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if(missing)
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XFreeStringList(missing);
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if(set) {
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XFontSetExtents *font_extents;
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XFontStruct **xfonts;
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char **font_names;
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ascent = descent = 0;
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font_extents = XExtentsOfFontSet(set);
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n = XFontsOfFontSet(set, &xfonts, &font_names);
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for(i = 0, ascent = 0, descent = 0; i < n; i++) {
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if(ascent < (*xfonts)->ascent)
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ascent = (*xfonts)->ascent;
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if(descent < (*xfonts)->descent)
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descent = (*xfonts)->descent;
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xfonts++;
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}
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} else if(!set && (xfont = XLoadQueryFont(dpy, fontstr))) {
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ascent = xfont->ascent;
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descent = xfont->descent;
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} else
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eprint("fatal: cannot find specified font\n");
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printf("%d\n", ascent + descent + 2);
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return EXIT_SUCCESS;
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}
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