src/fl_set_font.cxx

   1 //
   2 // "$Id: fl_set_font.cxx 7903 2010-11-28 21:06:39Z matt $"
   3 //
   4 // Font utilities for the Fast Light Tool Kit (FLTK).
   5 //
   6 // Copyright 1998-2010 by Bill Spitzak and others.
   7 //
   8 // This library is free software; you can redistribute it and/or
   9 // modify it under the terms of the GNU Library General Public
  10 // License as published by the Free Software Foundation; either
  11 // version 2 of the License, or (at your option) any later version.
  12 //
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 // Library General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU Library General Public
  19 // License along with this library; if not, write to the Free Software
  20 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21 // USA.
  22 //
  23 // Please report all bugs and problems on the following page:
  24 //
  25 //     http://www.fltk.org/str.php
  26 //
  27
  28 // Add a font to the internal table.
  29 // Also see fl_set_fonts.cxx which adds all possible fonts.
  30
  31 #include <FL/Fl.H>
  32 #include <FL/x.H>
  33 #include <FL/fl_draw.H>
  34 #include "flstring.h"
  35 #include "Fl_Font.H"
  36 #include <stdlib.h>
  37
  38 static int table_size;
  39 /**
  40   Changes a face.  The string pointer is simply stored,
  41   the string is not copied, so the string must be in static memory.
  42 */
  43 void Fl::set_font(Fl_Font fnum, const char* name) {
  44   while (fnum >= table_size) {
  45     int i = table_size;
  46     if (!i) {   // don't realloc the built-in table
  47       table_size = 2*FL_FREE_FONT;
  48       i = FL_FREE_FONT;
  49       Fl_Fontdesc* t = (Fl_Fontdesc*)malloc(table_size*sizeof(Fl_Fontdesc));
  50       memcpy(t, fl_fonts, FL_FREE_FONT*sizeof(Fl_Fontdesc));
  51       fl_fonts = t;
  52     } else {
  53       table_size = 2*table_size;
  54       fl_fonts=(Fl_Fontdesc*)realloc(fl_fonts, table_size*sizeof(Fl_Fontdesc));
  55     }
  56     for (; i < table_size; i++) {
  57       fl_fonts[i].fontname[0] = 0;
  58       fl_fonts[i].name = 0;
  59 #if !defined(WIN32) && !defined(__APPLE__)
  60       fl_fonts[i].xlist = 0;
  61       fl_fonts[i].n = 0;
  62 #endif // !WIN32 && !__APPLE__
  63     }
  64   }
  65   Fl_Fontdesc* s = fl_fonts+fnum;
  66   if (s->name) {
  67     if (!strcmp(s->name, name)) {s->name = name; return;}
  68 #if !defined(WIN32) && !defined(__APPLE__)
  69     if (s->xlist && s->n >= 0) XFreeFontNames(s->xlist);
  70 #endif
  71     for (Fl_Font_Descriptor* f = s->first; f;) {
  72       Fl_Font_Descriptor* n = f->next; delete f; f = n;
  73     }
  74     s->first = 0;
  75   }
  76   s->name = name;
  77   s->fontname[0] = 0;
  78 #if !defined(WIN32) && !defined(__APPLE__)
  79   s->xlist = 0;
  80 #endif
  81   s->first = 0;
  82   fl_font(-1, 0);
  83 }
  84 /** Copies one face to another. */
  85 void Fl::set_font(Fl_Font fnum, Fl_Font from) {
  86   Fl::set_font(fnum, get_font(from));
  87 }
  88 /**
  89     Gets the string for this face.  This string is different for each
  90     face. Under X this value is passed to XListFonts to get all the sizes
  91     of this face.
  92 */
  93 const char* Fl::get_font(Fl_Font fnum) {return fl_fonts[fnum].name;}
  94
  95 //
  96 // End of "$Id: fl_set_font.cxx 7903 2010-11-28 21:06:39Z matt $".
  97 //