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comparison lwlib/lwlib-fonts.c @ 3094:ad2f4ae9895b

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[xemacs-hg @ 2005-11-26 11:45:47 by stephent] Xft merge. <87k6ev4p8q.fsf@tleepslib.sk.tsukuba.ac.jp>
author stephent
date Sat, 26 Nov 2005 11:46:25 +0000
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children 15fb91e3a115
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3093:769dc945b085 3094:ad2f4ae9895b
1 /* Font handling code for X and Xft.
2
3 Copyright (C) 2003 Eric Knauel
4 Copyright (C) 2004 Free Software Foundation, Inc.
5
6 Author: Stephen J. Turnbull <stephen@xemacs.org>
7 Created: 24 Jul 2004 by Stephen J. Turnbull
8
9 This file is part of XEmacs.
10
11 XEmacs is free software; you can redistribute it and/or modify it
12 under the terms of the GNU General Public License as published by the
13 Free Software Foundation; either version 2, or (at your option) any
14 later version.
15
16 XEmacs is distributed in the hope that it will be useful, but WITHOUT
17 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
18 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19 for more details.
20
21 You should have received a copy of the GNU General Public License
22 along with XEmacs; see the file COPYING. If not, write to
23 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
24 Boston, MA 02111-1307, USA. */
25
26 /* Synched up with: Not in GNU Emacs. */
27
28 #include <config.h>
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include "lwlib-fonts.h"
32
33 #if 0
34 /* these are all from ../src; if we need them move the code */
35 #include "lisp.h"
36 #include "device.h"
37 #include "device-impl.h"
38 #include "console-x-impl.h"
39 #include "xft-fonts.h"
40 #endif
41
42 /*
43 * code for handling Xft
44 */
45
46 #ifdef USE_XFT
47
48 /* helper function to correctly open Xft/core fonts by name
49 #### Can't we use FcParseName here?
50 #### Is this done so often that the logic needs to be hard-coded in C?
51
52 Daniel Pittman sez: Older code tried to enforce that an XLFD font was
53 not scaled, while this version just doesn't care. I think that is a
54 better behavior, since if someone really wants a scaled font we should
55 oblige them.
56
57 Stephen sez: This whole function was ill-conceived, and I'm not sure it
58 succeeds at any of the things it attempts to do. First, we should be
59 using fontconfig directly. I'm not sure what Xft (or fontconfig) will
60 try to do if passed an XLFD. As for scaled fonts, both options are
61 equally bad. The problem is that the X server will often scale bitmap
62 fonts willy-nilly; it's worth trying to avoid that, but I can't say
63 whether that's worth overriding somebody who knows what they're doing.
64 In any case, I think we should find out what Xft (fontconfig?) is able
65 and willing to do with XLFDs, and probably move the logic to LISP.
66 */
67 XftFont *
68 xft_open_font_by_name (Display *dpy, char *name)
69 {
70 XftFont *res = NULL;
71
72 /* if (!NILP (Fxft_xlfd_font_name_p (make_string (name, strlen (name))))) */
73 /* #### this is bogus but ... */
74 int count = 0;
75 char *pos = name;
76 /* extra parens shut up gcc */
77 while ((pos = index (pos, '-')))
78 {
79 count++;
80 pos++;
81 }
82
83 /* #### hard-coding DefaultScreen is evil! */
84 if (count == 14 /* fully-qualified XLFD */
85 || (count < 14 /* heuristic for wildcarded XLFD */
86 && count >= 5
87 && index (name, '*')))
88 res = XftFontOpenXlfd (dpy, DefaultScreen (dpy), name);
89 else
90 res = XftFontOpenName (dpy, DefaultScreen (dpy), name);
91
92 /* Try for a generic monospace font
93 #### Why? Menus don't need to line up in columns! */
94 if (!res)
95 res = XftFontOpenName (dpy, DefaultScreen (dpy), "monospace");
96 /* Try for anything we can get */
97 if (!res)
98 res = XftFontOpenName (dpy, DefaultScreen (dpy), "");
99
100 if (!res)
101 {
102 /* #### This is Just So Wrong ... ! */
103 /* sorry folks ... */
104 fprintf (stderr,
105 "Unable to find any usable XFT font, even the defaults!\n");
106 abort ();
107 return 0;
108 }
109
110 return res;
111 }
112
113 #endif /* USE_XFT */
114
115 /* End of lwlib-fonts.c */