draw.h

   1 /*
   2  * draw.h - draw functions header
   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 #ifndef AWESOME_COMMON_DRAW_H
  23 #define AWESOME_COMMON_DRAW_H
  24
  25 #include <xcb/xcb.h>
  26 #include <cairo.h>
  27 #include <lua.h>
  28
  29 #include "common/util.h"
  30
  31 typedef struct area_t area_t;
  32 struct area_t
  33 {
  34     /** Co-ords of upper left corner */
  35     int16_t  x;
  36     int16_t  y;
  37     uint16_t width;
  38     uint16_t height;
  39 };
  40
  41 #define AREA_LEFT(a)    ((a).x)
  42 #define AREA_TOP(a)     ((a).y)
  43 #define AREA_RIGHT(a)   ((a).x + (a).width)
  44 #define AREA_BOTTOM(a)    ((a).y + (a).height)
  45
  46 bool draw_iso2utf8(const char *, size_t, char **, ssize_t *);
  47
  48 /** Convert a string to UTF-8.
  49  * \param str The string to convert.
  50  * \param len The string length.
  51  * \param dest The destination string that will be allocated.
  52  * \param dlen The destination string length allocated, can be NULL.
  53  * \return True if the conversion happened, false otherwise. In both case, dest
  54  * and dlen will have value and dest have to be free().
  55  */
  56 static inline bool
  57 a_iso2utf8(const char *str, ssize_t len, char **dest, ssize_t *dlen)
  58 {
  59     if(draw_iso2utf8(str, len, dest, dlen))
  60         return true;
  61
  62     *dest = a_strdup(str);
  63     if(dlen)
  64         *dlen = len;
  65
  66     return false;
  67 }
  68
  69 cairo_surface_t *draw_surface_from_data(int width, int height, uint32_t *data);
  70 cairo_surface_t *draw_dup_image_surface(cairo_surface_t *surface);
  71 cairo_surface_t *draw_load_image(lua_State *L, const char *path);
  72
  73 xcb_visualtype_t *draw_default_visual(const xcb_screen_t *s);
  74 xcb_visualtype_t *draw_argb_visual(const xcb_screen_t *s);
  75 uint8_t draw_visual_depth(const xcb_screen_t *s, xcb_visualid_t vis);
  76
  77 #endif
  78 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80