src/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 "gccache.hh"
  23 #include "color.hh"
  24
  25 string      BFont::_fallback_font   = "fixed";
  26
  27 BFont::BFont(Display *d, BScreen *screen, const string &family, int size,
  28              bool bold, bool italic, bool shadow, unsigned char offset,
  29              unsigned char tint, bool antialias) :
  30                                           _display(d),
  31                                           _screen(screen),
  32                                           _family(family),
  33                                           _simplename(False),
  34                                           _size(size),
  35                                           _bold(bold),
  36                                           _italic(italic),
  37                                           _antialias(antialias),
  38                                           _shadow(shadow),
  39                                           _offset(offset),
  40                                           _tint(tint),
  41                                           _xftfont(0) {
  42   _valid = False;
  43
  44   _xftfont = XftFontOpen(_display, _screen->getScreenNumber(),
  45                          XFT_FAMILY, XftTypeString,  _family.c_str(),
  46                          XFT_SIZE,   XftTypeInteger, _size,
  47                          XFT_WEIGHT, XftTypeInteger, (_bold ?
  48                                                       XFT_WEIGHT_BOLD :
  49                                                       XFT_WEIGHT_MEDIUM),
  50                          XFT_SLANT,  XftTypeInteger, (_italic ?
  51                                                       XFT_SLANT_ITALIC :
  52                                                       XFT_SLANT_ROMAN),
  53                          XFT_ANTIALIAS, XftTypeBool, _antialias,
  54                          0);
  55   if (! _xftfont)
  56     return; // failure
  57
  58   _valid = True;
  59 }
  60
  61
  62 BFont::~BFont(void) {
  63   if (_xftfont)
  64     XftFontClose(_display, _xftfont);
  65 }
  66
  67
  68 void BFont::drawString(Drawable d, int x, int y, const BColor &color,
  69                        const string &string) const {
  70   assert(_valid);
  71
  72   XftDraw *draw = XftDrawCreate(_display, d, _screen->getVisual(),
  73                                 _screen->getColormap());
  74   assert(draw);
  75
  76   if (_shadow) {
  77     XftColor c;
  78     c.color.red = 0;
  79     c.color.green = 0;
  80     c.color.blue = 0;
  81     c.color.alpha = _tint | _tint << 8; // transparent shadow
  82     c.pixel = BlackPixel(_display, _screen->getScreenNumber());
  83
  84     XftDrawStringUtf8(draw, &c, _xftfont, x + _offset,
  85                       _xftfont->ascent + y + _offset,
  86                       (XftChar8 *) string.c_str(),
  87                       string.size());
  88   }
  89
  90   XftColor c;
  91   c.color.red = color.red() | color.red() << 8;
  92   c.color.green = color.green() | color.green() << 8;
  93   c.color.blue = color.blue() | color.blue() << 8;
  94   c.pixel = color.pixel();
  95   c.color.alpha = 0xff | 0xff << 8; // no transparency in BColor yet
  96
  97   XftDrawStringUtf8(draw, &c, _xftfont, x, _xftfont->ascent + y,
  98                     (XftChar8 *) string.c_str(), string.size());
  99
 100   XftDrawDestroy(draw);
 101   return;
 102 }
 103
 104
 105 unsigned int BFont::measureString(const string &string) const {
 106   assert(_valid);
 107
 108   XGlyphInfo info;
 109
 110   XftTextExtentsUtf8(_display, _xftfont, (XftChar8 *) string.c_str(),
 111                      string.size(), &info);
 112
 113   return info.xOff + (_shadow ? _offset : 0);
 114 }
 115
 116
 117 unsigned int BFont::height(void) const {
 118   assert(_valid);
 119
 120   return _xftfont->height + (_shadow ? _offset : 0);
 121 }
 122
 123
 124 unsigned int BFont::maxCharWidth(void) const {
 125   assert(_valid);
 126
 127   return _xftfont->max_advance_width;
 128 }