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     XftFontClose(ob_display, f->xftfont);
  72     g_free(f);
  73 }
  74
  75 int font_measure_string(ObFont *f, char *str, int shadow, int offset)
  76 {
  77     XGlyphInfo info;
  78
  79     XftTextExtentsUtf8(ob_display, f->xftfont,
  80                        (FcChar8*)str, strlen(str), &info);
  81
  82     return (signed) info.xOff + (shadow ? offset : 0);
  83 }
  84
  85 int font_height(ObFont *f, int shadow, int offset)
  86 {
  87     return f->height + (shadow ? offset : 0);
  88 }
  89
  90 int font_max_char_width(ObFont *f)
  91 {
  92     return (signed) f->xftfont->max_advance_width;
  93 }
  94
  95 void font_draw(XftDraw *d, TextureText *t, Rect *position)
  96 {
  97     int x,y,w,h;
  98     XftColor c;
  99
 100     x = position->x;
 101     y = position->y;
 102     w = position->width;
 103     h = position->height;
 104
 105     /* accomidate for areas bigger/smaller than Xft thinks the font is tall */
 106     y -= (2 * (t->font->xftfont->ascent + t->font->xftfont->descent) -
 107           (t->font->height + h) - 1) / 2;
 108
 109     x += 3; /* XXX figure out X with justification */
 110
 111     if (t->shadow) {
 112         if (t->tint >= 0) {
 113             c.color.red = 0;
 114             c.color.green = 0;
 115             c.color.blue = 0;
 116             c.color.alpha = 0xffff * t->tint / 100; /* transparent shadow */
 117             c.pixel = BlackPixel(ob_display, ob_screen);
 118         } else {
 119             c.color.red = 0xffff * -t->tint / 100;
 120             c.color.green = 0xffff * -t->tint / 100;
 121             c.color.blue = 0xffff * -t->tint / 100;
 122             c.color.alpha = 0xffff * -t->tint / 100; /* transparent shadow */
 123             c.pixel = WhitePixel(ob_display, ob_screen);
 124         }
 125         XftDrawStringUtf8(d, &c, t->font->xftfont, x + t->offset,
 126                           t->font->xftfont->ascent + y + t->offset,
 127                           (FcChar8*)t->string, strlen(t->string));
 128     }
 129     c.color.red = t->color->r | t->color->r << 8;
 130     c.color.green = t->color->g | t->color->g << 8;
 131     c.color.blue = t->color->b | t->color->b << 8;
 132     c.color.alpha = 0xff | 0xff << 8; /* fully opaque text */
 133     c.pixel = t->color->pixel;
 134
 135     XftDrawStringUtf8(d, &c, t->font->xftfont, x,
 136                       t->font->xftfont->ascent + y,
 137                       (FcChar8*)t->string, strlen(t->string));
 138     return;
 139 }