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