font.c

   1 /*
   2  * font.c - font functions
   3  *
   4  * Copyright © 2007-2009 Julien Danjou <julien@danjou.info>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  */
  21
  22 #include <cairo/cairo-xcb.h>
  23 #include <pango/pangocairo.h>
  24
  25 #include "font.h"
  26 #include "screen.h"
  27 #include "globalconf.h"
  28 #include "common/xutil.h"
  29
  30 /** Create a new Pango font.
  31  * \param fontname Pango fontname (e.g. [FAMILY-LIST] [STYLE-OPTIONS] [SIZE]).
  32  * \return A new font.
  33  */
  34 font_t *
  35 draw_font_new(const char *fontname)
  36 {
  37     cairo_surface_t *surface;
  38     xcb_screen_t *s = xutil_screen_get(globalconf.connection, globalconf.default_screen);
  39     cairo_t *cr;
  40     PangoLayout *layout;
  41     font_t *font = p_new(font_t, 1);
  42
  43     /* Create a dummy cairo surface, cairo context and pango layout in
  44      * order to get font informations */
  45     surface = cairo_xcb_surface_create(globalconf.connection,
  46                                        globalconf.default_screen,
  47                                        globalconf.screens.tab[0].visual,
  48                                        s->width_in_pixels,
  49                                        s->height_in_pixels);
  50
  51     cr = cairo_create(surface);
  52     layout = pango_cairo_create_layout(cr);
  53
  54     /* Get the font description used to set text on a PangoLayout */
  55     font->desc = pango_font_description_from_string(fontname);
  56     pango_layout_set_font_description(layout, font->desc);
  57
  58     /* Get height */
  59     pango_layout_get_pixel_size(layout, NULL, &font->height);
  60
  61     g_object_unref(layout);
  62     cairo_destroy(cr);
  63     cairo_surface_destroy(surface);
  64
  65     return font;
  66 }
  67
  68 /** Delete a font.
  69  * \param font Font to delete.
  70  */
  71 void
  72 draw_font_delete(font_t **font)
  73 {
  74     if(*font)
  75     {
  76         pango_font_description_free((*font)->desc);
  77         p_delete(font);
  78     }
  79 }
  80
  81 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80