src/font.cc

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   2 // Font.cc for Blackbox - an X11 Window manager
   3 // Copyright (c) 2001 - 2002 Sean 'Shaleh' Perry <shaleh@debian.org>
   4 // Copyright (c) 1997 - 2000 Brad Hughes (bhughes@tcac.net)
   5 //
   6 // Permission is hereby granted, free of charge, to any person obtaining a
   7 // copy of this software and associated documentation files (the "Software"),
   8 // to deal in the Software without restriction, including without limitation
   9 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10 // and/or sell copies of the Software, and to permit persons to whom the
  11 // Software is furnished to do so, subject to the following conditions:
  12 //
  13 // The above copyright notice and this permission notice shall be included in
  14 // all copies or substantial portions of the Software.
  15 //
  16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19 // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22 // DEALINGS IN THE SOFTWARE.
  23
  24 #ifdef    HAVE_CONFIG_H
  25 #  include "../config.h"
  26 #endif // HAVE_CONFIG_H
  27
  28 extern "C" {
  29 #ifdef HAVE_STDLIB_H
  30 #  include <stdlib.h>
  31 #endif // HAVE_STDLIB_H
  32 }
  33
  34 #include <iostream>
  35 #include <algorithm>
  36
  37 using std::string;
  38 using std::cerr;
  39 using std::endl;
  40
  41 #include "font.hh"
  42 #include "util.hh"
  43 #include "gccache.hh"
  44 #include "color.hh"
  45
  46 string      BFont::_fallback_font   = "fixed";
  47
  48 BFont::BFont(Display *d, BScreen *screen, const string &family, int size,
  49              bool bold, bool italic, bool shadow, unsigned char offset,
  50              unsigned char tint, bool antialias) :
  51                                           _display(d),
  52                                           _screen(screen),
  53                                           _family(family),
  54                                           _simplename(False),
  55                                           _size(size),
  56                                           _bold(bold),
  57                                           _italic(italic),
  58                                           _antialias(antialias),
  59                                           _shadow(shadow),
  60                                           _offset(offset),
  61                                           _tint(tint),
  62                                           _xftfont(0) {
  63   _valid = False;
  64
  65   _xftfont = XftFontOpen(_display, _screen->getScreenNumber(),
  66                          XFT_FAMILY, XftTypeString,  _family.c_str(),
  67                          XFT_SIZE,   XftTypeInteger, _size,
  68                          XFT_WEIGHT, XftTypeInteger, (_bold ?
  69                                                       XFT_WEIGHT_BOLD :
  70                                                       XFT_WEIGHT_MEDIUM),
  71                          XFT_SLANT,  XftTypeInteger, (_italic ?
  72                                                       XFT_SLANT_ITALIC :
  73                                                       XFT_SLANT_ROMAN),
  74                          XFT_ANTIALIAS, XftTypeBool, _antialias,
  75                          0);
  76   if (! _xftfont)
  77     return; // failure
  78
  79   _valid = True;
  80 }
  81
  82
  83 BFont::~BFont(void) {
  84   if (_xftfont)
  85     XftFontClose(_display, _xftfont);
  86 }
  87
  88
  89 void BFont::drawString(Drawable d, int x, int y, const BColor &color,
  90                        const string &string) const {
  91   assert(_valid);
  92
  93   XftDraw *draw = XftDrawCreate(_display, d, _screen->getVisual(),
  94                                 _screen->getColormap());
  95   assert(draw);
  96
  97   if (_shadow) {
  98     XftColor c;
  99     c.color.red = 0;
 100     c.color.green = 0;
 101     c.color.blue = 0;
 102     c.color.alpha = _tint | _tint << 8; // transparent shadow
 103     c.pixel = BlackPixel(_display, _screen->getScreenNumber());
 104
 105     XftDrawStringUtf8(draw, &c, _xftfont, x + _offset,
 106                       _xftfont->ascent + y + _offset,
 107                       (XftChar8 *) string.c_str(),
 108                       string.size());
 109   }
 110
 111   XftColor c;
 112   c.color.red = color.red() | color.red() << 8;
 113   c.color.green = color.green() | color.green() << 8;
 114   c.color.blue = color.blue() | color.blue() << 8;
 115   c.pixel = color.pixel();
 116   c.color.alpha = 0xff | 0xff << 8; // no transparency in BColor yet
 117
 118   XftDrawStringUtf8(draw, &c, _xftfont, x, _xftfont->ascent + y,
 119                     (XftChar8 *) string.c_str(), string.size());
 120
 121   XftDrawDestroy(draw);
 122   return;
 123 }
 124
 125
 126 unsigned int BFont::measureString(const string &string) const {
 127   assert(_valid);
 128
 129   XGlyphInfo info;
 130
 131   XftTextExtentsUtf8(_display, _xftfont, (XftChar8 *) string.c_str(),
 132                      string.size(), &info);
 133
 134   return info.xOff + (_shadow ? _offset : 0);
 135 }
 136
 137
 138 unsigned int BFont::height(void) const {
 139   assert(_valid);
 140
 141   return _xftfont->height + (_shadow ? _offset : 0);
 142 }
 143
 144
 145 unsigned int BFont::maxCharWidth(void) const {
 146   assert(_valid);
 147
 148   return _xftfont->max_advance_width;
 149 }