draw.h

   1 /*
   2  * draw.h - draw functions header
   3  *
   4  * Copyright © 2007-2008 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 <cairo.h>
  26 #include <pango/pangocairo.h>
  27
  28 #include <xcb/xcb.h>
  29
  30 #include "image.h"
  31 #include "common/array.h"
  32 #include "common/list.h"
  33 #include "common/buffer.h"
  34 #include "common/xutil.h"
  35
  36 typedef struct
  37 {
  38     unsigned initialized : 1;
  39     uint32_t pixel;
  40     uint16_t red;
  41     uint16_t green;
  42     uint16_t blue;
  43     uint16_t alpha;
  44 } xcolor_t;
  45
  46 typedef enum
  47 {
  48     AlignLeft = 0,
  49     AlignRight,
  50     AlignCenter,
  51     AlignFlex,
  52     AlignAuto
  53 } alignment_t;
  54
  55 typedef struct vector_t vector_t;
  56 struct vector_t
  57 {
  58     /** Co-ords of starting point */
  59     int16_t x;
  60     int16_t y;
  61     /** Offset to starting point */
  62     int16_t x_offset;
  63     int16_t y_offset;
  64 };
  65
  66 typedef struct area_t area_t;
  67 struct area_t
  68 {
  69     /** Co-ords of upper left corner */
  70     int16_t  x;
  71     int16_t  y;
  72     uint16_t width;
  73     uint16_t height;
  74 };
  75
  76 DO_ARRAY(area_t, area, DO_NOTHING)
  77
  78 #define AREA_LEFT(a)    ((a).x)
  79 #define AREA_TOP(a)     ((a).y)
  80 #define AREA_RIGHT(a)   ((a).x + (a).width)
  81 #define AREA_BOTTOM(a)    ((a).y + (a).height)
  82
  83 typedef struct
  84 {
  85     PangoFontDescription *desc;
  86     int height;
  87 } font_t;
  88
  89 typedef struct
  90 {
  91     xcb_pixmap_t pixmap;
  92     xcb_visualtype_t *visual;
  93     uint16_t width;
  94     uint16_t height;
  95     int phys_screen;
  96     uint8_t depth;
  97     cairo_t *cr;
  98     cairo_surface_t *surface;
  99     PangoLayout *layout;
 100     xcolor_t fg;
 101     xcolor_t bg;
 102 } draw_context_t;
 103
 104 void draw_context_init(draw_context_t *, int, int, int,
 105                        xcb_pixmap_t, const xcolor_t *, const xcolor_t *);
 106
 107 /** Wipe a draw context.
 108  * \param ctx The draw_context_t to wipe.
 109  */
 110 static inline void
 111 draw_context_wipe(draw_context_t *ctx)
 112 {
 113     g_object_unref(ctx->layout);
 114     cairo_surface_destroy(ctx->surface);
 115     cairo_destroy(ctx->cr);
 116 }
 117
 118 font_t *draw_font_new(int, const char *);
 119 void draw_font_delete(font_t **);
 120
 121 char * draw_iso2utf8(const char *, size_t);
 122
 123 static inline bool
 124 a_iso2utf8(char **dest, const char *str, ssize_t len)
 125 {
 126     char *utf8;
 127     if((utf8 = draw_iso2utf8(str, len)))
 128     {
 129         *dest = utf8;
 130         return true;
 131     }
 132     *dest = a_strdup(str);
 133     return false;
 134 }
 135
 136 typedef struct
 137 {
 138     PangoAttrList *attr_list;
 139     char *text;
 140     ssize_t len;
 141     alignment_t align;
 142     struct
 143     {
 144         int left, right, top;
 145     } margin;
 146     struct
 147     {
 148         int top, left;
 149     } bg_margin;
 150     bool has_bg_color;
 151     xcolor_t bg_color;
 152     image_t *bg_image;
 153     alignment_t bg_align;
 154     bool bg_resize;
 155     struct
 156     {
 157         int offset;
 158         xcolor_t color;
 159     } shadow;
 160     struct
 161     {
 162         int width;
 163         xcolor_t color;
 164     } border;
 165 } draw_parser_data_t;
 166
 167 bool draw_text_markup_expand(draw_parser_data_t *, const char *, ssize_t);
 168
 169 void draw_text(draw_context_t *, font_t *, area_t, const char *, ssize_t len, draw_parser_data_t *);
 170 void draw_rectangle(draw_context_t *, area_t, float, bool, const xcolor_t *);
 171 void draw_rectangle_gradient(draw_context_t *, area_t, float, bool, vector_t,
 172                              const xcolor_t *, const xcolor_t *, const xcolor_t *);
 173
 174 void draw_graph_setup(draw_context_t *);
 175 void draw_graph(draw_context_t *, area_t, int *, int *, int, position_t, vector_t,
 176                 const xcolor_t *, const xcolor_t *, const xcolor_t *);
 177 void draw_graph_line(draw_context_t *, area_t, int *, int, position_t, vector_t,
 178                      const xcolor_t *, const xcolor_t *, const xcolor_t *);
 179 void draw_image(draw_context_t *, int, int, int, image_t *);
 180 void draw_rotate(draw_context_t *, xcb_drawable_t, xcb_drawable_t, int, int, int, int, double, int, int);
 181 area_t draw_text_extents(int, font_t *, const char *, ssize_t, draw_parser_data_t *);
 182 alignment_t draw_align_fromstr(const char *, ssize_t);
 183 const char *draw_align_tostr(alignment_t);
 184
 185 typedef struct
 186 {
 187     union
 188     {
 189         xcb_alloc_color_cookie_t cookie_hexa;
 190         xcb_alloc_named_color_cookie_t cookie_named;
 191     };
 192
 193     uint16_t alpha;
 194     xcolor_t *color;
 195     bool is_hexa, has_error;
 196     const char *colstr;
 197 } xcolor_init_request_t;
 198
 199 xcolor_init_request_t xcolor_init_unchecked(xcolor_t *, const char *, ssize_t);
 200 bool xcolor_init_reply(xcolor_init_request_t);
 201
 202 static inline void
 203 draw_parser_data_init(draw_parser_data_t *pdata)
 204 {
 205     p_clear(pdata, 1);
 206 }
 207
 208 static inline void
 209 draw_parser_data_wipe(draw_parser_data_t *pdata)
 210 {
 211     if(pdata)
 212     {
 213         pango_attr_list_unref(pdata->attr_list);
 214         p_delete(&pdata->text);
 215         image_unref(&pdata->bg_image);
 216     }
 217 }
 218
 219 #endif
 220 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80