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 "gccache.hh"
  23 #include "color.hh"
  24 #include "screeninfo.hh"
  25
  26 namespace otk {
  27
  28 string      BFont::_fallback_font   = "fixed";
  29
  30 BFont::BFont(int screen_num, const string &family, int size,
  31              bool bold, bool italic, bool shadow, unsigned char offset,
  32              unsigned char tint, bool antialias) :
  33                                           _screen_num(screen_num),
  34                                           _family(family),
  35                                           _simplename(False),
  36                                           _size(size),
  37                                           _bold(bold),
  38                                           _italic(italic),
  39                                           _antialias(antialias),
  40                                           _shadow(shadow),
  41                                           _offset(offset),
  42                                           _tint(tint),
  43                                           _xftfont(0) {
  44   _valid = False;
  45
  46   _xftfont = XftFontOpen(OBDisplay::display, _screen_num,
  47                          XFT_FAMILY, XftTypeString,  _family.c_str(),
  48                          XFT_SIZE,   XftTypeInteger, _size,
  49                          XFT_WEIGHT, XftTypeInteger, (_bold ?
  50                                                       XFT_WEIGHT_BOLD :
  51                                                       XFT_WEIGHT_MEDIUM),
  52                          XFT_SLANT,  XftTypeInteger, (_italic ?
  53                                                       XFT_SLANT_ITALIC :
  54                                                       XFT_SLANT_ROMAN),
  55                          XFT_ANTIALIAS, XftTypeBool, _antialias,
  56                          0);
  57   if (! _xftfont)
  58     return; // failure
  59
  60   _valid = True;
  61 }
  62
  63
  64 BFont::~BFont(void) {
  65   if (_xftfont)
  66     XftFontClose(OBDisplay::display, _xftfont);
  67 }
  68
  69
  70 void BFont::drawString(Drawable d, int x, int y, const BColor &color,
  71                        const string &string) const {
  72   assert(_valid);
  73
  74   const ScreenInfo *info = OBDisplay::screenInfo(_screen_num);
  75   XftDraw *draw = XftDrawCreate(OBDisplay::display, d,
  76                                 info->getVisual(), info->getColormap());
  77   assert(draw);
  78
  79   if (_shadow) {
  80     XftColor c;
  81     c.color.red = 0;
  82     c.color.green = 0;
  83     c.color.blue = 0;
  84     c.color.alpha = _tint | _tint << 8; // transparent shadow
  85     c.pixel = BlackPixel(OBDisplay::display, _screen_num);
  86
  87     XftDrawString8(draw, &c, _xftfont, x + _offset,
  88                    _xftfont->ascent + y + _offset,
  89                    (XftChar8 *) string.c_str(),
  90                    string.size());
  91   }
  92
  93   XftColor c;
  94   c.color.red = color.red() | color.red() << 8;
  95   c.color.green = color.green() | color.green() << 8;
  96   c.color.blue = color.blue() | color.blue() << 8;
  97   c.pixel = color.pixel();
  98   c.color.alpha = 0xff | 0xff << 8; // no transparency in BColor yet
  99
 100   XftDrawString8(draw, &c, _xftfont, x, _xftfont->ascent + y,
 101                  (XftChar8 *) string.c_str(), string.size());
 102
 103   XftDrawDestroy(draw);
 104   return;
 105 }
 106
 107
 108 unsigned int BFont::measureString(const string &string) const {
 109   assert(_valid);
 110
 111   XGlyphInfo info;
 112
 113   XftTextExtents8(OBDisplay::display, _xftfont,
 114                   (XftChar8 *) string.c_str(), string.size(), &info);
 115
 116   return info.xOff + (_shadow ? _offset : 0);
 117 }
 118
 119
 120 unsigned int BFont::height(void) const {
 121   assert(_valid);
 122
 123   return _xftfont->height + (_shadow ? _offset : 0);
 124 }
 125
 126
 127 unsigned int BFont::maxCharWidth(void) const {
 128   assert(_valid);
 129
 130   return _xftfont->max_advance_width;
 131 }
 132
 133 }