Dogcows Code - chaz/openbox/blob - render/font.c

   1 #include "../kernel/openbox.h"
   2 #include "font.h"
   3
   4 #include "../kernel/gettext.h"
   5 #define _(str) gettext(str)
   6
   7 #include <X11/Xft/Xft.h>
   8 #include <glib.h>
   9 #include "../kernel/geom.h"
  10
  11 void font_startup(void)
  12 {
  13 #ifdef DEBUG
  14     int version;
  15 #endif /* DEBUG */
  16     if (!XftInit(0)) {
  17         g_warning(_("Couldn't initialize Xft.\n"));
  18         exit(3);
  19     }
  20 #ifdef DEBUG
  21     version = XftGetVersion();
  22     g_message("Using Xft %d.%d.%d (Built against %d.%d.%d).",
  23               version / 10000 % 100, version / 100 % 100, version % 100,
  24               XFT_MAJOR, XFT_MINOR, XFT_REVISION);
  25 #endif
  26 }
  27
  28 static void measure_height(ObFont *f)
  29 {
  30     XGlyphInfo info;
  31     char *str;
  32
  33     /* XXX add some extended UTF8 characters in here? */
  34     str = "12345678900-qwertyuiopasdfghjklzxcvbnm"
  35         "!@#$%^&*()_+QWERTYUIOPASDFGHJKLZXCVBNM"
  36         "`~[]\\;',./{}|:\"<>?";
  37
  38     XftTextExtentsUtf8(ob_display, f->xftfont,
  39                        (FcChar8*)str, strlen(str), &info);
  40     f->height = (signed) info.height;
  41 }
  42
  43 ObFont *font_open(char *fontstring)
  44 {
  45     ObFont *out;
  46     XftFont *xf;
  47
  48     if ((xf = XftFontOpenName(ob_display, ob_screen, fontstring))) {
  49         out = g_new(ObFont, 1);
  50         out->xftfont = xf;
  51         measure_height(out);
  52         return out;
  53     }
  54     g_warning(_("Unable to load font: %s\n"), fontstring);
  55     g_warning(_("Trying fallback font: %s\n"), "sans");
  56
  57     if ((xf = XftFontOpenName(ob_display, ob_screen, "sans"))) {
  58         out = g_new(ObFont, 1);
  59         out->xftfont = xf;
  60         measure_height(out);
  61         return out;
  62     }
  63     g_warning(_("Unable to load font: %s\n"), "sans");
  64     g_warning(_("Aborting!.\n"));
  65
  66     exit(3); /* can't continue without a font */
  67 }
  68
  69 void font_close(ObFont *f)
  70 {
  71     if (f) {
  72         XftFontClose(ob_display, f->xftfont);
  73         g_free(f);
  74     }
  75 }
  76
  77 int font_measure_string(ObFont *f, char *str, int shadow, int offset)
  78 {
  79     XGlyphInfo info;
  80
  81     XftTextExtentsUtf8(ob_display, f->xftfont,
  82                        (FcChar8*)str, strlen(str), &info);
  83
  84     return (signed) info.xOff + (shadow ? offset : 0);
  85 }
  86
  87 int font_height(ObFont *f, int shadow, int offset)
  88 {
  89     return f->height + (shadow ? offset : 0);
  90 }
  91
  92 int font_max_char_width(ObFont *f)
  93 {
  94     return (signed) f->xftfont->max_advance_width;
  95 }
  96
  97 void font_draw(XftDraw *d, TextureText *t, Rect *position)
  98 {
  99     int x,y,w,h;
 100     XftColor c;
 101     char *text;
 102     int m;
 103     size_t l;
 104
 105     y = position->y;
 106     w = position->width;
 107     h = position->height;
 108
 109     /* accomidate for areas bigger/smaller than Xft thinks the font is tall */
 110     y -= (2 * (t->font->xftfont->ascent + t->font->xftfont->descent) -
 111           (t->font->height + h) - 1) / 2;
 112
 113     text = g_strdup(t->string);
 114     l = strlen(text);
 115     m = font_measure_string(t->font, text, t->shadow, t->offset);
 116     while (l && m > position->width) {
 117         text[--l] = '\0';
 118         m = font_measure_string(t->font, text, t->shadow, t->offset);
 119     }
 120     if (!l) return;
 121
 122     switch (t->justify) {
 123     case Justify_Left:
 124         x = position->x;
 125         break;
 126     case Justify_Right:
 127         x = position->x + (w - m);
 128         break;
 129     case Justify_Center:
 130         x = position->x + (w - m) / 2;
 131         break;
 132     }
 133
 134     if (t->shadow) {
 135         if (t->tint >= 0) {
 136             c.color.red = 0;
 137             c.color.green = 0;
 138             c.color.blue = 0;
 139             c.color.alpha = 0xffff * t->tint / 100; /* transparent shadow */
 140             c.pixel = BlackPixel(ob_display, ob_screen);
 141         } else {
 142             c.color.red = 0xffff * -t->tint / 100;
 143             c.color.green = 0xffff * -t->tint / 100;
 144             c.color.blue = 0xffff * -t->tint / 100;
 145             c.color.alpha = 0xffff * -t->tint / 100; /* transparent shadow */
 146             c.pixel = WhitePixel(ob_display, ob_screen);
 147         }
 148         XftDrawStringUtf8(d, &c, t->font->xftfont, x + t->offset,
 149                           t->font->xftfont->ascent + y + t->offset,
 150                           (FcChar8*)text, l);
 151     }
 152     c.color.red = t->color->r | t->color->r << 8;
 153     c.color.green = t->color->g | t->color->g << 8;
 154     c.color.blue = t->color->b | t->color->b << 8;
 155     c.color.alpha = 0xff | 0xff << 8; /* fully opaque text */
 156     c.pixel = t->color->pixel;
 157
 158     XftDrawStringUtf8(d, &c, t->font->xftfont, x,
 159                       t->font->xftfont->ascent + y,
 160                       (FcChar8*)text, l);
 161     return;
 162 }