Dogcows Code - chaz/openbox/blob - otk/font.cc

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   2
   3 #ifdef    HAVE_CONFIG_H
   4 #  include "../config.h"
   5 #endif // HAVE_CONFIG_H
   6
   7 extern "C" {
   8 #ifdef HAVE_STDLIB_H
   9 #  include <stdlib.h>
  10 #endif // HAVE_STDLIB_H
  11 }
  12
  13 #include <iostream>
  14 #include <algorithm>
  15
  16 #include "font.hh"
  17 #include "util.hh"
  18 #include "display.hh"
  19 #include "color.hh"
  20 #include "screeninfo.hh"
  21
  22 extern "C" {
  23 #ifdef    HAVE_STDIO_H
  24 #  include <stdio.h>
  25 #endif // HAVE_STDIO_H
  26
  27 #include "gettext.h"
  28 #define _(str) gettext(str)
  29 }
  30
  31 namespace otk {
  32
  33 std::string Font::_fallback_font = "fixed";
  34 bool        Font::_xft_init      = false;
  35
  36 Font::Font(int screen_num, const std::string &fontstring,
  37              bool shadow, unsigned char offset, unsigned char tint)
  38   : _screen_num(screen_num),
  39     _fontstring(fontstring),
  40     _shadow(shadow),
  41     _offset(offset),
  42     _tint(tint),
  43     _xftfont(0)
  44 {
  45   assert(screen_num >= 0);
  46   assert(tint <= CHAR_MAX);
  47
  48   if (!_xft_init) {
  49     if (!XftInit(0)) {
  50       printf(_("Couldn't initialize Xft.\n\n"));
  51       ::exit(3);
  52     }
  53     int version = XftGetVersion();
  54     printf(_("Using Xft %d.%d.%d.\n"),
  55            version / 10000 % 100, version / 100 % 100, version % 100);
  56     _xft_init = true;
  57   }
  58
  59   if ((_xftfont = XftFontOpenName(Display::display, _screen_num,
  60                                   _fontstring.c_str())))
  61     return;
  62
  63   printf(_("Unable to load font: %s\n"), _fontstring.c_str());
  64   printf(_("Trying fallback font: %s\n"), _fallback_font.c_str());
  65
  66   if ((_xftfont = XftFontOpenName(Display::display, _screen_num,
  67                                   _fallback_font.c_str())))
  68     return;
  69
  70   printf(_("Unable to load font: %s\n"), _fallback_font.c_str());
  71   printf(_("Aborting!.\n"));
  72
  73   ::exit(3); // can't continue without a font
  74 }
  75
  76
  77 Font::~Font(void)
  78 {
  79   if (_xftfont)
  80     XftFontClose(Display::display, _xftfont);
  81 }
  82
  83
  84 void Font::drawString(XftDraw *d, int x, int y, const Color &color,
  85                        const ustring &string) const
  86 {
  87   assert(d);
  88
  89   if (_shadow) {
  90     XftColor c;
  91     c.color.red = 0;
  92     c.color.green = 0;
  93     c.color.blue = 0;
  94     c.color.alpha = _tint | _tint << 8; // transparent shadow
  95     c.pixel = BlackPixel(Display::display, _screen_num);
  96
  97     if (string.utf8())
  98       XftDrawStringUtf8(d, &c, _xftfont, x + _offset,
  99                         _xftfont->ascent + y + _offset,
 100                         (FcChar8*)string.c_str(), string.size());
 101     else
 102       XftDrawString8(d, &c, _xftfont, x + _offset,
 103                      _xftfont->ascent + y + _offset,
 104                      (FcChar8*)string.c_str(), string.size());
 105   }
 106
 107   XftColor c;
 108   c.color.red = color.red() | color.red() << 8;
 109   c.color.green = color.green() | color.green() << 8;
 110   c.color.blue = color.blue() | color.blue() << 8;
 111   c.pixel = color.pixel();
 112   c.color.alpha = 0xff | 0xff << 8; // no transparency in Color yet
 113
 114   if (string.utf8())
 115     XftDrawStringUtf8(d, &c, _xftfont, x, _xftfont->ascent + y,
 116                       (FcChar8*)string.c_str(), string.size());
 117   else
 118     XftDrawString8(d, &c, _xftfont, x, _xftfont->ascent + y,
 119                    (FcChar8*)string.c_str(), string.size());
 120
 121   return;
 122 }
 123
 124
 125 unsigned int Font::measureString(const ustring &string) const
 126 {
 127   XGlyphInfo info;
 128
 129   if (string.utf8())
 130     XftTextExtentsUtf8(Display::display, _xftfont,
 131                        (FcChar8*)string.c_str(), string.size(), &info);
 132   else
 133     XftTextExtents8(Display::display, _xftfont,
 134                     (FcChar8*)string.c_str(), string.size(), &info);
 135
 136   return info.xOff + (_shadow ? _offset : 0);
 137 }
 138
 139
 140 unsigned int Font::height(void) const
 141 {
 142   return _xftfont->height + (_shadow ? _offset : 0);
 143 }
 144
 145
 146 unsigned int Font::maxCharWidth(void) const
 147 {
 148   return _xftfont->max_advance_width;
 149 }
 150
 151 }