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
  10 void font_startup(void)
  11 {
  12 #ifdef DEBUG
  13     int version;
  14 #endif /* DEBUG */
  15     if (!XftInit(0)) {
  16         g_warning(_("Couldn't initialize Xft.\n"));
  17         exit(3);
  18     }
  19 #ifdef DEBUG
  20     version = XftGetVersion();
  21     g_message("Using Xft %d.%d.%d (Built against %d.%d.%d).",
  22               version / 10000 % 100, version / 100 % 100, version % 100,
  23               XFT_MAJOR, XFT_MINOR, XFT_REVISION);
  24 #endif
  25 }
  26
  27 static void measure_height(ObFont *f)
  28 {
  29     XGlyphInfo info;
  30     char *str;
  31
  32     /* XXX add some extended UTF8 characters in here? */
  33     str = "12345678900-qwertyuiopasdfghjklzxcvbnm"
  34         "!@#$%^&*()_+QWERTYUIOPASDFGHJKLZXCVBNM"
  35         "`~[]\\;',./{}|:\"<>?";
  36
  37     XftTextExtentsUtf8(ob_display, f->xftfont,
  38                        (FcChar8*)str, strlen(str), &info);
  39     f->height = (signed) info.height;
  40 }
  41
  42 ObFont *font_open(char *fontstring)
  43 {
  44     ObFont *out;
  45     XftFont *xf;
  46
  47     if ((xf = XftFontOpenName(ob_display, ob_screen, fontstring))) {
  48         out = g_new(ObFont, 1);
  49         out->xftfont = xf;
  50         measure_height(out);
  51         return out;
  52     }
  53     g_warning(_("Unable to load font: %s\n"), fontstring);
  54     g_warning(_("Trying fallback font: %s\n"), "fixed");
  55
  56     if ((xf = XftFontOpenName(ob_display, ob_screen, "fixed"))) {
  57         out = g_new(ObFont, 1);
  58         out->xftfont = xf;
  59         measure_height(out);
  60         return out;
  61     }
  62     g_warning(_("Unable to load font: %s\n"), "fixed");
  63     g_warning(_("Aborting!.\n"));
  64
  65     exit(3); /* can't continue without a font */
  66 }
  67
  68 void font_close(ObFont *f)
  69 {
  70     XftFontClose(ob_display, f->xftfont);
  71     g_free(f);
  72 }
  73
  74 int font_measure_string(ObFont *f, char *str, int shadow, int offset)
  75 {
  76     XGlyphInfo info;
  77
  78     XftTextExtentsUtf8(ob_display, f->xftfont,
  79                        (FcChar8*)str, strlen(str), &info);
  80
  81     return (signed) info.xOff + (shadow ? offset : 0);
  82 }
  83
  84 int font_height(ObFont *f, int shadow, int offset)
  85 {
  86     return f->height + (shadow ? offset : 0);
  87 }
  88
  89 int font_max_char_width(ObFont *f)
  90 {
  91     return (signed) f->xftfont->max_advance_width;
  92 }
  93
  94 void font_draw(XftDraw *d, TextureText *t, int x, int y, int w, int h)
  95 {
  96     XftColor c;
  97
  98     /* accomidate for areas bigger/smaller than Xft thinks the font is tall */
  99     y += (h - t->font->xftfont->height) / 2;
 100
 101     x += 3; /* XXX figure out X with justification */
 102
 103     if (t->shadow) {
 104         c.color.red = 0;
 105         c.color.green = 0;
 106         c.color.blue = 0;
 107         c.color.alpha = t->tint | t->tint << 8; /* transparent shadow */
 108         c.pixel = BlackPixel(ob_display, ob_screen);
 109
 110         XftDrawStringUtf8(d, &c, t->font->xftfont, x + t->offset,
 111                           t->font->xftfont->ascent + y + t->offset,
 112                           (FcChar8*)t->string, strlen(t->string));
 113     }
 114     c.color.red = t->color->r | t->color->r << 8;
 115     c.color.green = t->color->g | t->color->g << 8;
 116     c.color.blue = t->color->b | t->color->b << 8;
 117     c.color.alpha = 0xff | 0xff << 8; /* fully opaque text */
 118     c.pixel = t->color->pixel;
 119
 120     XftDrawStringUtf8(d, &c, t->font->xftfont, x,
 121                       t->font->xftfont->ascent + y -
 122                       (t->font->xftfont->height - t->font->height) / 2,
 123                      (FcChar8*)t->string, strlen(t->string));
 124     return;
 125 }