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     if(ctx->layout)
 114     {
 115         g_object_unref(ctx->layout);
 116         ctx->layout = NULL;
 117     }
 118     if(ctx->surface)
 119     {
 120         cairo_surface_destroy(ctx->surface);
 121         ctx->surface = NULL;
 122     }
 123     if(ctx->cr)
 124     {
 125         cairo_destroy(ctx->cr);
 126         ctx->cr = NULL;
 127     }
 128 }
 129
 130 font_t *draw_font_new(int, const char *);
 131 void draw_font_delete(font_t **);
 132
 133 char * draw_iso2utf8(const char *, size_t);
 134
 135 static inline bool
 136 a_iso2utf8(char **dest, const char *str, ssize_t len)
 137 {
 138     char *utf8;
 139     if((utf8 = draw_iso2utf8(str, len)))
 140     {
 141         *dest = utf8;
 142         return true;
 143     }
 144     *dest = a_strdup(str);
 145     return false;
 146 }
 147
 148 typedef struct
 149 {
 150     PangoAttrList *attr_list;
 151     char *text;
 152     ssize_t len;
 153     alignment_t align;
 154     struct
 155     {
 156         int left, right, top;
 157     } margin;
 158     struct
 159     {
 160         int top, left;
 161     } bg_margin;
 162     bool has_bg_color;
 163     xcolor_t bg_color;
 164     image_t *bg_image;
 165     alignment_t bg_align;
 166     bool bg_resize;
 167     struct
 168     {
 169         int offset;
 170         xcolor_t color;
 171     } shadow;
 172     struct
 173     {
 174         int width;
 175         xcolor_t color;
 176     } border;
 177 } draw_parser_data_t;
 178
 179 bool draw_text_markup_expand(draw_parser_data_t *, const char *, ssize_t);
 180
 181 void draw_text(draw_context_t *, font_t *, area_t, const char *, ssize_t len, draw_parser_data_t *);
 182 void draw_rectangle(draw_context_t *, area_t, float, bool, const xcolor_t *);
 183 void draw_rectangle_gradient(draw_context_t *, area_t, float, bool, vector_t,
 184                              const xcolor_t *, const xcolor_t *, const xcolor_t *);
 185
 186 void draw_graph_setup(draw_context_t *);
 187 void draw_graph(draw_context_t *, area_t, int *, int *, int, position_t, vector_t,
 188                 const xcolor_t *, const xcolor_t *, const xcolor_t *);
 189 void draw_graph_line(draw_context_t *, area_t, int *, int, position_t, vector_t,
 190                      const xcolor_t *, const xcolor_t *, const xcolor_t *);
 191 void draw_image(draw_context_t *, int, int, int, image_t *);
 192 void draw_rotate(draw_context_t *, xcb_drawable_t, xcb_drawable_t, int, int, int, int, double, int, int);
 193 area_t draw_text_extents(int, font_t *, const char *, ssize_t, draw_parser_data_t *);
 194 alignment_t draw_align_fromstr(const char *, ssize_t);
 195 const char *draw_align_tostr(alignment_t);
 196
 197 typedef struct
 198 {
 199     union
 200     {
 201         xcb_alloc_color_cookie_t cookie_hexa;
 202         xcb_alloc_named_color_cookie_t cookie_named;
 203     };
 204
 205     uint16_t alpha;
 206     xcolor_t *color;
 207     bool is_hexa, has_error;
 208     const char *colstr;
 209 } xcolor_init_request_t;
 210
 211 xcolor_init_request_t xcolor_init_unchecked(xcolor_t *, const char *, ssize_t);
 212 bool xcolor_init_reply(xcolor_init_request_t);
 213
 214 static inline void
 215 draw_parser_data_init(draw_parser_data_t *pdata)
 216 {
 217     p_clear(pdata, 1);
 218 }
 219
 220 static inline void
 221 draw_parser_data_wipe(draw_parser_data_t *pdata)
 222 {
 223     if(pdata)
 224     {
 225         pango_attr_list_unref(pdata->attr_list);
 226         p_delete(&pdata->text);
 227         image_unref(&pdata->bg_image);
 228     }
 229 }
 230
 231 #endif
 232 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80