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 using std::string;
  17 using std::cerr;
  18 using std::endl;
  19
  20 #include "font.hh"
  21 #include "util.hh"
  22 #include "display.hh"
  23 #include "color.hh"
  24 #include "screeninfo.hh"
  25
  26 extern "C" {
  27 #ifdef    HAVE_STDIO_H
  28 #  include <stdio.h>
  29 #endif // HAVE_STDIO_H
  30
  31 #include "gettext.h"
  32 #define _(str) gettext(str)
  33 }
  34
  35 namespace otk {
  36
  37 string      Font::_fallback_font = "fixed";
  38 bool        Font::_xft_init      = false;
  39
  40 Font::Font(int screen_num, const string &fontstring,
  41              bool shadow, unsigned char offset, unsigned char tint)
  42   : _screen_num(screen_num),
  43     _fontstring(fontstring),
  44     _shadow(shadow),
  45     _offset(offset),
  46     _tint(tint),
  47     _xftfont(0)
  48 {
  49   assert(screen_num >= 0);
  50   assert(tint <= CHAR_MAX);
  51
  52   if (!_xft_init) {
  53     if (!XftInit(0)) {
  54       printf(_("Couldn't initialize Xft.\n\n"));
  55       ::exit(3);
  56     }
  57     int version = XftGetVersion();
  58     printf(_("Using Xft %d.%d.%d.\n"),
  59            version / 10000 % 100, version / 100 % 100, version % 100);
  60     _xft_init = true;
  61   }
  62
  63   if ((_xftfont = XftFontOpenName(Display::display, _screen_num,
  64                                   _fontstring.c_str())))
  65     return;
  66
  67   printf(_("Unable to load font: %s\n"), _fontstring.c_str());
  68   printf(_("Trying fallback font: %s\n"), _fallback_font.c_str());
  69
  70   if ((_xftfont = XftFontOpenName(Display::display, _screen_num,
  71                                   _fallback_font.c_str())))
  72     return;
  73
  74   printf(_("Unable to load font: %s\n"), _fallback_font.c_str());
  75   printf(_("Aborting!.\n"));
  76
  77   ::exit(3); // can't continue without a font
  78 }
  79
  80
  81 Font::~Font(void)
  82 {
  83   if (_xftfont)
  84     XftFontClose(Display::display, _xftfont);
  85 }
  86
  87
  88 void Font::drawString(XftDraw *d, int x, int y, const Color &color,
  89                        const string &string, bool utf8) const
  90 {
  91   assert(d);
  92
  93   if (_shadow) {
  94     XftColor c;
  95     c.color.red = 0;
  96     c.color.green = 0;
  97     c.color.blue = 0;
  98     c.color.alpha = _tint | _tint << 8; // transparent shadow
  99     c.pixel = BlackPixel(Display::display, _screen_num);
 100
 101     if (utf8)
 102       XftDrawStringUtf8(d, &c, _xftfont, x + _offset,
 103                         _xftfont->ascent + y + _offset,
 104                         (FcChar8*)string.c_str(), string.size());
 105     else
 106       XftDrawString8(d, &c, _xftfont, x + _offset,
 107                      _xftfont->ascent + y + _offset,
 108                      (FcChar8*)string.c_str(), 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 Color yet
 117
 118   if (utf8)
 119     XftDrawStringUtf8(d, &c, _xftfont, x, _xftfont->ascent + y,
 120                       (FcChar8*)string.c_str(), string.size());
 121   else
 122     XftDrawString8(d, &c, _xftfont, x, _xftfont->ascent + y,
 123                    (FcChar8*)string.c_str(), string.size());
 124
 125   return;
 126 }
 127
 128
 129 unsigned int Font::measureString(const string &string, bool utf8) const
 130 {
 131   XGlyphInfo info;
 132
 133   if (utf8)
 134     XftTextExtentsUtf8(Display::display, _xftfont,
 135                        (FcChar8*)string.c_str(), string.size(), &info);
 136   else
 137     XftTextExtents8(Display::display, _xftfont,
 138                     (FcChar8*)string.c_str(), string.size(), &info);
 139
 140   return info.xOff + (_shadow ? _offset : 0);
 141 }
 142
 143
 144 unsigned int Font::height(void) const
 145 {
 146   return _xftfont->height + (_shadow ? _offset : 0);
 147 }
 148
 149
 150 unsigned int Font::maxCharWidth(void) const
 151 {
 152   return _xftfont->max_advance_width;
 153 }
 154
 155 }