trunk/src/icons.c

/*
 * Copyright (C) 2008-2010 Till Harbaum <till@harbaum.org>.
 *
 * This file is part of GPXView.
 *
 * GPXView is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * GPXView is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GPXView.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "gpxview.h"
#include <math.h>     // for isnan()

struct icon_data {
  GdkPixbuf **data;
  int count;
} icons[] = {
  { NULL, CACHE_TYPE_MAX+5 },             /* ICON_CACHE_TYPE      */
  { NULL, CACHE_TYPE_MAX+5 },             /* ICON_CACHE_TYPE_SEMI */
  { NULL, CACHE_TYPE_MAX+5 },             /* ICON_CACHE_TYPE_1_5X */
  { NULL, CACHE_TYPE_MAX+5 },             /* ICON_CACHE_TYPE_2X   */
  { NULL, CACHE_CONT_MAX+1 },             /* ICON_CACHE_SIZE      */
  { NULL, 9 },                            /* ICON_STARS           */
  { NULL, LOG_TYPE_MAX+1 },               /* ICON_LOG             */
  { NULL, 9 },                            /* ICON_HEADING         */
  { NULL, WPT_SYM_MAX+1 },                /* ICON_WPT             */
  { NULL, 2 },                            /* ICON_TB              */
  { NULL, 8 },                            /* ICON_MISC            */
  { NULL, WPT_SYM_MAX+CACHE_TYPE_MAX+11 },/* ICON_POS             */
  { NULL, 3 },                            /* ICON_FILE            */
  { NULL, ATT_MAX+2 },                    /* ICON_ATT             */
  { NULL, -1 }
};

/* ICON_ATT */
static const char *att_icon_name[] = { 
  "no", "unknown",
  "dogs", "fee", "rappelling", "boat",                     // 1-4
  "scuba", "kids", "onehour", "scenic", "hiking",          // 5-9
  "climbing", "wading", "swimming", "available", "night",  // 10-14
  "winter", "unknown", "poisonoak", "snakes", "ticks",     // 15-19
  "mine", "cliff", "hunting", "danger", "wheelchair",      // 20-24
  "parking", "public", "water", "restrooms", "phone",      // 25-29
  "picnic", "camping", "bicycles", "motorcycles", "quads", // 30-34
  "jeeps", "snowmobiles", "horses", "campfires", "thorn",  // 35-39
  "stealth", "stroller", "firstaid", "cow", "flashlight",  // 40-44
  "landf", "rv", "field_puzzle", "UV", "snowshoes",        // 45-49
  "skiis", "s_tool", "nightcache", "parkngrab", "abandonedbuilding", // 50-54
  "hike_short", "hike_med", "hike_long", "fuel", "food",   // 55-59
  NULL
};

/* ICON_CACHE_TYPE / ICON_CACHE_TYPE_SEMI / ICON_CACHE_TYPE_2X */
const char *cache_type_icon_name[] = {
  "traditional", "multi",      "mystery", "virtual", "webcam", "event",
  "letterbox",   "earthcache", "wherigo", "megaevent", "cito",

  /* special overlays */
  "ovl_override", "ovl_found", "ovl_note", "ovl_mine",

  NULL
};

/* ICON_CACHE_SIZE */
const char *cache_size_icon_name[] = {
  "regular", "small",      "micro", "other", "not_chosen", "large",
  "virtual", NULL
};

/* ICON_STARS      */
const char *stars_icon_name[] = {
  "1", "1_5", "2", "2_5", "3", "3_5", "4", "4_5", "5", NULL
};

/* ICON_LOG        */
const char *log_icon_name[] = {
  "smile", "sad", "maint", "note", "big_smile", "enabled",
  "greenlight", "rsvp", "attended", "camera", "disabled",
  "needsmaint", "coord_update",
  "traffic_cone",
  "traffic_cone", /* LOG_TYPE_NEEDS_ARCHIVED */
  "traffic_cone", 
  NULL
};  

/* ICON_HEADING    */
const char *heading_icon_name[] = {
  "n", "ne", "e", "se", "s", "sw", "w", "nw", "none", NULL
};

/* ICON_WPT        */
const char *wpt_sym_icon_name[] = {
  "multistage", "parking", "final", "question",
  "trailhead", "refpoint", NULL
};

/* ICON_TB         */
const char *tb_icon_name[] = {
  "tb", "coin", NULL
};

/* ICON_MISC         */
const char *misc_icon_name[] = {
  "32x32/locked", "32x32/unlocked", "32x32/delete", 
#ifdef FREMANTLE
  "64x64/paypal", 
#else
  "32x32/paypal", 
#endif
  "32x32/pos_geomath", 
#ifdef FREMANTLE
  "64x64/gpxview",
#else
  "32x32/gpxview",
#endif
#ifndef USE_MAEMO
  "16x16/speaker", "16x16/speaker_off",
#else
#ifndef FREMANTLE
  "24x24/speaker", "24x24/speaker_off",
#else
  "32x32/speaker", "32x32/speaker_off",
#endif
#endif

  NULL
};

/* ICON_POS        */
const char *pos_icon_name[] = {
  "wpt_multistage",         "wpt_parking",           "wpt_final",
  "wpt_question",           "wpt_trailhead",         "wpt_refpoint", 

  "cache_type_traditional", "cache_type_multi",      "cache_type_mystery", 
  "cache_type_virtual",     "cache_type_webcam",     "cache_type_event",
  "cache_type_letterbox",   "cache_type_earthcache", "cache_type_wherigo", 
  "cache_type_megaevent",   "cache_type_cito",

  "pos_wpt", "pos_gps", "pos_geomath", "pos_map", "pos_home",

  "pos_get", "pos_set", "maemo-mapper", "clipboard",

  NULL
};

/* ICON_FILE         */
const char *file_icon_name[] = {
  "gc", "folder", "zip", NULL
};

static void icons_load(int type, char *format, const char *names[]) {
  int i;

  if(!icons[type].count) {
    icons[type].data = NULL;
    return;
  }

  icons[type].data = malloc(sizeof(GdkPixbuf *) * icons[type].count);
  
  for(i=0;i<icons[type].count;i++) {
    g_assert(names[i]);

    GError *error = NULL;
    char filename[128];
    strcpy(filename, ICONPATH);
    snprintf(filename+strlen(filename),
             sizeof(filename)-strlen(filename), format, names[i], "png");
    icons[type].data[i] = gdk_pixbuf_new_from_file(filename, &error);
    
    if(error) {
      error = NULL;
      /* try again in local dir */
      strcpy(filename, "./data/icons/");
      snprintf(filename+strlen(filename), 
               sizeof(filename)-strlen(filename), format, names[i], "png");
      icons[type].data[i] = gdk_pixbuf_new_from_file(filename, &error);
        
      if(error) {
        icons[type].data[i] = NULL;
        g_warning("Could not load icon %s: %s\n", names[i], error->message);
        g_error_free(error);
        error = NULL;
      }   
    }
  }
  
  g_assert(!names[i]);
}

void icons_init(void) {

  /* load cache type icons */
  icons_load(ICON_CACHE_TYPE, "32x32/cache_type_%s.%s", cache_type_icon_name);

  /* load semitransparent cache type icons */
  icons_load(ICON_CACHE_TYPE_SEMI, "32x32/cache_type_%s_semi.%s", cache_type_icon_name);

  /* load 150% sized cache type icons */
  icons_load(ICON_CACHE_TYPE_1_5X, "48x48/cache_type_%s.%s", cache_type_icon_name);

  /* load double sized cache type icons */
  icons_load(ICON_CACHE_TYPE_2X, "64x64/cache_type_%s.%s", cache_type_icon_name);

  /* load cache container/size icons */
#if !defined(USE_MAEMO) || (MAEMO_VERSION_MAJOR < 5)
  icons_load(ICON_CACHE_SIZE, "45x12/cache_size_%s.%s", cache_size_icon_name);
#else
  icons_load(ICON_CACHE_SIZE, "90x24/cache_size_%s.%s", cache_size_icon_name);
#endif

  /* load cache difficulty/terrain/quality icons */
#if !defined(USE_MAEMO) || (MAEMO_VERSION_MAJOR < 5)
  icons_load(ICON_STARS, "12x12/stars%s.%s", stars_icon_name);
#else
  icons_load(ICON_STARS, "16x16/stars%s.%s", stars_icon_name);
#endif

  /* load cache log icons */
  icons_load(ICON_LOG, "32x32/log_icon_%s.%s", log_icon_name);

  /* load icons to visualize heading */
#if !defined(USE_MAEMO) || (MAEMO_VERSION_MAJOR < 5)
  icons_load(ICON_HEADING, "32x32/heading_%s.%s", heading_icon_name);
#else
  icons_load(ICON_HEADING, "48x48/heading_%s.%s", heading_icon_name);
#endif

  /* load waypoint icons */
  icons_load(ICON_WPT, "32x32/wpt_%s.%s", wpt_sym_icon_name);

  /* load travelbug/coin icons */
  icons_load(ICON_TB, "32x32/%s.%s", tb_icon_name);

  /* load misc icons */
  icons_load(ICON_MISC, "%s.%s", misc_icon_name);

  /* load pos icons */
#if !defined(USE_MAEMO)
  icons_load(ICON_POS, "16x16/%s.%s", pos_icon_name);
#else
#if (MAEMO_VERSION_MAJOR < 5)
  icons_load(ICON_POS, "24x24/%s.%s", pos_icon_name);
#else
  icons_load(ICON_POS, "32x32/%s.%s", pos_icon_name);
#endif
#endif

  /* load file icons */
  icons_load(ICON_FILE, "32x32/file_%s.%s", file_icon_name);

  /* load attribute icons */
  icons_load(ICON_ATT, "32x32/att_%s.%s", att_icon_name);
}

void icons_free(void) {
  int i;
  struct icon_data *icon = icons;

  while(icon->count >= 0) {
    if(icon->count) {
      for(i=0;i<icon->count;i++)
        if(icon->data[i])
          gdk_pixbuf_unref(icon->data[i]);

      free(icon->data);
    }

    icon++;
  }
}

GdkPixbuf *icon_get(int type, int num) {
  if(num < 0)                  return NULL;
  if(num >= icons[type].count) return NULL;

  return icons[type].data[num];
}

GtkWidget *icon_get_widget(int type, int num) {
  GdkPixbuf *pbuf = icon_get(type, num);
  if(!pbuf) return NULL;

  return gtk_image_new_from_pixbuf(pbuf);
}

/* routine to overlay two pixbufs */
GdkPixbuf *pixbuf_overlay(GdkPixbuf *bot, GdkPixbuf *top) {
  GdkPixbuf *pix = gdk_pixbuf_copy(bot);

  gdk_pixbuf_composite(top, pix,
       0, 0, gdk_pixbuf_get_width(bot), gdk_pixbuf_get_height(bot), 
       0.0, 0.0, 1.0, 1.0, GDK_INTERP_NEAREST, 255);

  return pix;
}

GtkWidget *icon_get_widget_ovl(int type, int num, int ovl) {
  GdkPixbuf *pbuf0 = icon_get(type, num);
  GdkPixbuf *pbuf1 = icon_get(type, ovl);
  if(!pbuf0 || !pbuf1) return NULL;

  GdkPixbuf *pbuf = pixbuf_overlay(pbuf0, pbuf1);
  GtkWidget *widget = gtk_image_new_from_pixbuf(pbuf);

  /* widget now holds a reference */
  gdk_pixbuf_unref(pbuf);
  
  return widget;
}

GdkPixbuf *icon_bearing(pos_t from, pos_t to) {
  if(isnan(from.lat) || isnan(from.lon) || 
     isnan(to.lat) || isnan(to.lon))
    return icon_get(ICON_HEADING, 8);

  int idx = (gpx_pos_get_bearing(from, to)+22.5)/45.0;

  /* make sure we stay in icon bounds */
  if(idx < 0) idx += 8;
  if(idx > 7) idx -= 8;
  return icon_get(ICON_HEADING, idx);
}

1	harbaum	1	/*
2	harbaum	294	* Copyright (C) 2008-2010 Till Harbaum <till@harbaum.org>.
3	harbaum	1	*
4			* This file is part of GPXView.
5			*
6			* GPXView 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 3 of the License, or
9			* (at your option) any later version.
10			*
11			* GPXView 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
17			* along with GPXView. If not, see <http://www.gnu.org/licenses/>.
18			*/
19
20			#include "gpxview.h"
21	harbaum	53	#include <math.h> // for isnan()
22	harbaum	1
23			struct icon_data {
24			GdkPixbuf **data;
25			int count;
26			} icons[] = {
27	harbaum	214	{ NULL, CACHE_TYPE_MAX+5 }, /* ICON_CACHE_TYPE */
28			{ NULL, CACHE_TYPE_MAX+5 }, /* ICON_CACHE_TYPE_SEMI */
29			{ NULL, CACHE_TYPE_MAX+5 }, /* ICON_CACHE_TYPE_1_5X */
30			{ NULL, CACHE_TYPE_MAX+5 }, /* ICON_CACHE_TYPE_2X */
31			{ NULL, CACHE_CONT_MAX+1 }, /* ICON_CACHE_SIZE */
32			{ NULL, 9 }, /* ICON_STARS */
33			{ NULL, LOG_TYPE_MAX+1 }, /* ICON_LOG */
34			{ NULL, 9 }, /* ICON_HEADING */
35			{ NULL, WPT_SYM_MAX+1 }, /* ICON_WPT */
36			{ NULL, 2 }, /* ICON_TB */
37	harbaum	246	{ NULL, 8 }, /* ICON_MISC */
38	harbaum	249	{ NULL, WPT_SYM_MAX+CACHE_TYPE_MAX+11 },/* ICON_POS */
39	harbaum	214	{ NULL, 3 }, /* ICON_FILE */
40	harbaum	294	{ NULL, ATT_MAX+2 }, /* ICON_ATT */
41	harbaum	1	{ NULL, -1 }
42			};
43
44	harbaum	293	/* ICON_ATT */
45			static const char *att_icon_name[] = {
46			"no", "unknown",
47			"dogs", "fee", "rappelling", "boat", // 1-4
48			"scuba", "kids", "onehour", "scenic", "hiking", // 5-9
49			"climbing", "wading", "swimming", "available", "night", // 10-14
50			"winter", "unknown", "poisonoak", "snakes", "ticks", // 15-19
51			"mine", "cliff", "hunting", "danger", "wheelchair", // 20-24
52			"parking", "public", "water", "restrooms", "phone", // 25-29
53			"picnic", "camping", "bicycles", "motorcycles", "quads", // 30-34
54			"jeeps", "snowmobiles", "horses", "campfires", "thorn", // 35-39
55			"stealth", "stroller", "firstaid", "cow", "flashlight", // 40-44
56	harbaum	302	"landf", "rv", "field_puzzle", "UV", "snowshoes", // 45-49
57	harbaum	294	"skiis", "s_tool", "nightcache", "parkngrab", "abandonedbuilding", // 50-54
58			"hike_short", "hike_med", "hike_long", "fuel", "food", // 55-59
59	harbaum	293	NULL
60			};
61
62	harbaum	174	/* ICON_CACHE_TYPE / ICON_CACHE_TYPE_SEMI / ICON_CACHE_TYPE_2X */
63	harbaum	1	const char *cache_type_icon_name[] = {
64			"traditional", "multi", "mystery", "virtual", "webcam", "event",
65	harbaum	188	"letterbox", "earthcache", "wherigo", "megaevent", "cito",
66
67			/* special overlays */
68	harbaum	205	"ovl_override", "ovl_found", "ovl_note", "ovl_mine",
69	harbaum	189
70			NULL
71	harbaum	1	};
72
73			/* ICON_CACHE_SIZE */
74			const char *cache_size_icon_name[] = {
75			"regular", "small", "micro", "other", "not_chosen", "large",
76	harbaum	189	"virtual", NULL
77	harbaum	1	};
78
79			/* ICON_STARS */
80			const char *stars_icon_name[] = {
81	harbaum	189	"1", "1_5", "2", "2_5", "3", "3_5", "4", "4_5", "5", NULL
82	harbaum	1	};
83
84			/* ICON_LOG */
85			const char *log_icon_name[] = {
86			"smile", "sad", "maint", "note", "big_smile", "enabled",
87			"greenlight", "rsvp", "attended", "camera", "disabled",
88			"needsmaint", "coord_update",
89			"traffic_cone",
90			"traffic_cone", /* LOG_TYPE_NEEDS_ARCHIVED */
91	harbaum	189	"traffic_cone",
92			NULL
93	harbaum	1	};
94
95			/* ICON_HEADING */
96			const char *heading_icon_name[] = {
97	harbaum	189	"n", "ne", "e", "se", "s", "sw", "w", "nw", "none", NULL
98	harbaum	1	};
99
100			/* ICON_WPT */
101			const char *wpt_sym_icon_name[] = {
102			"multistage", "parking", "final", "question",
103	harbaum	189	"trailhead", "refpoint", NULL
104	harbaum	1	};
105
106			/* ICON_TB */
107			const char *tb_icon_name[] = {
108	harbaum	189	"tb", "coin", NULL
109	harbaum	1	};
110
111			/* ICON_MISC */
112			const char *misc_icon_name[] = {
113	harbaum	294	"32x32/locked", "32x32/unlocked", "32x32/delete",
114	harbaum	229	#ifdef FREMANTLE
115			"64x64/paypal",
116			#else
117			"32x32/paypal",
118			#endif
119			"32x32/pos_geomath",
120			#ifdef FREMANTLE
121			"64x64/gpxview",
122			#else
123			"32x32/gpxview",
124			#endif
125	harbaum	246	#ifndef USE_MAEMO
126			"16x16/speaker", "16x16/speaker_off",
127			#else
128			#ifndef FREMANTLE
129			"24x24/speaker", "24x24/speaker_off",
130			#else
131			"32x32/speaker", "32x32/speaker_off",
132			#endif
133			#endif
134
135	harbaum	213	NULL
136	harbaum	1	};
137
138	harbaum	213	/* ICON_POS */
139			const char *pos_icon_name[] = {
140	harbaum	214	"wpt_multistage", "wpt_parking", "wpt_final",
141			"wpt_question", "wpt_trailhead", "wpt_refpoint",
142	harbaum	213
143	harbaum	214	"cache_type_traditional", "cache_type_multi", "cache_type_mystery",
144			"cache_type_virtual", "cache_type_webcam", "cache_type_event",
145			"cache_type_letterbox", "cache_type_earthcache", "cache_type_wherigo",
146			"cache_type_megaevent", "cache_type_cito",
147
148	harbaum	231	"pos_wpt", "pos_gps", "pos_geomath", "pos_map", "pos_home",
149
150	harbaum	249	"pos_get", "pos_set", "maemo-mapper", "clipboard",
151	harbaum	231
152	harbaum	213	NULL
153			};
154
155	harbaum	1	/* ICON_FILE */
156			const char *file_icon_name[] = {
157	harbaum	189	"gc", "folder", "zip", NULL
158	harbaum	1	};
159
160			static void icons_load(int type, char format, const char names[]) {
161			int i;
162
163			if(!icons[type].count) {
164			icons[type].data = NULL;
165			return;
166			}
167
168			icons[type].data = malloc(sizeof(GdkPixbuf ) icons[type].count);
169
170			for(i=0;i<icons[type].count;i++) {
171	harbaum	189	g_assert(names[i]);
172	harbaum	1
173	harbaum	189	GError *error = NULL;
174			char filename[128];
175			strcpy(filename, ICONPATH);
176			snprintf(filename+strlen(filename),
177			sizeof(filename)-strlen(filename), format, names[i], "png");
178			icons[type].data[i] = gdk_pixbuf_new_from_file(filename, &error);
179
180			if(error) {
181			error = NULL;
182			/* try again in local dir */
183			strcpy(filename, "./data/icons/");
184			snprintf(filename+strlen(filename),
185			sizeof(filename)-strlen(filename), format, names[i], "png");
186			icons[type].data[i] = gdk_pixbuf_new_from_file(filename, &error);
187
188	harbaum	1	if(error) {
189	harbaum	189	icons[type].data[i] = NULL;
190	harbaum	293	g_warning("Could not load icon %s: %s\n", names[i], error->message);
191	harbaum	189	g_error_free(error);
192	harbaum	1	error = NULL;
193	harbaum	189	}
194			}
195	harbaum	1	}
196	harbaum	214
197	harbaum	189	g_assert(!names[i]);
198	harbaum	1	}
199
200			void icons_init(void) {
201
202			/* load cache type icons */
203	harbaum	180	icons_load(ICON_CACHE_TYPE, "32x32/cache_type_%s.%s", cache_type_icon_name);
204	harbaum	1
205	harbaum	174	/* load semitransparent cache type icons */
206	harbaum	180	icons_load(ICON_CACHE_TYPE_SEMI, "32x32/cache_type_%s_semi.%s", cache_type_icon_name);
207	harbaum	151
208	harbaum	176	/* load 150% sized cache type icons */
209	harbaum	180	icons_load(ICON_CACHE_TYPE_1_5X, "48x48/cache_type_%s.%s", cache_type_icon_name);
210	harbaum	176
211	harbaum	174	/* load double sized cache type icons */
212	harbaum	180	icons_load(ICON_CACHE_TYPE_2X, "64x64/cache_type_%s.%s", cache_type_icon_name);
213	harbaum	174
214	harbaum	1	/* load cache container/size icons */
215	harbaum	187	#if !defined(USE_MAEMO) \|\| (MAEMO_VERSION_MAJOR < 5)
216	harbaum	185	icons_load(ICON_CACHE_SIZE, "45x12/cache_size_%s.%s", cache_size_icon_name);
217	harbaum	187	#else
218			icons_load(ICON_CACHE_SIZE, "90x24/cache_size_%s.%s", cache_size_icon_name);
219			#endif
220	harbaum	1
221	harbaum	180	/* load cache difficulty/terrain/quality icons */
222	harbaum	187	#if !defined(USE_MAEMO) \|\| (MAEMO_VERSION_MAJOR < 5)
223			icons_load(ICON_STARS, "12x12/stars%s.%s", stars_icon_name);
224			#else
225			icons_load(ICON_STARS, "16x16/stars%s.%s", stars_icon_name);
226			#endif
227	harbaum	1
228	harbaum	180	/* load cache log icons */
229			icons_load(ICON_LOG, "32x32/log_icon_%s.%s", log_icon_name);
230	harbaum	1
231			/* load icons to visualize heading */
232	harbaum	187	#if !defined(USE_MAEMO) \|\| (MAEMO_VERSION_MAJOR < 5)
233			icons_load(ICON_HEADING, "32x32/heading_%s.%s", heading_icon_name);
234			#else
235			icons_load(ICON_HEADING, "48x48/heading_%s.%s", heading_icon_name);
236			#endif
237	harbaum	1
238	harbaum	187	/* load waypoint icons */
239	harbaum	184	icons_load(ICON_WPT, "32x32/wpt_%s.%s", wpt_sym_icon_name);
240	harbaum	1
241	harbaum	187	/* load travelbug/coin icons */
242	harbaum	180	icons_load(ICON_TB, "32x32/%s.%s", tb_icon_name);
243	harbaum	1
244			/* load misc icons */
245			icons_load(ICON_MISC, "%s.%s", misc_icon_name);
246
247	harbaum	213	/* load pos icons */
248	harbaum	242	#if !defined(USE_MAEMO)
249	harbaum	213	icons_load(ICON_POS, "16x16/%s.%s", pos_icon_name);
250	harbaum	214	#else
251	harbaum	242	#if (MAEMO_VERSION_MAJOR < 5)
252			icons_load(ICON_POS, "24x24/%s.%s", pos_icon_name);
253			#else
254	harbaum	214	icons_load(ICON_POS, "32x32/%s.%s", pos_icon_name);
255			#endif
256	harbaum	242	#endif
257	harbaum	213
258	harbaum	1	/* load file icons */
259	harbaum	294	icons_load(ICON_FILE, "32x32/file_%s.%s", file_icon_name);
260	harbaum	293
261			/* load attribute icons */
262			icons_load(ICON_ATT, "32x32/att_%s.%s", att_icon_name);
263	harbaum	1	}
264
265			void icons_free(void) {
266			int i;
267			struct icon_data *icon = icons;
268
269			while(icon->count >= 0) {
270			if(icon->count) {
271			for(i=0;i<icon->count;i++)
272			if(icon->data[i])
273			gdk_pixbuf_unref(icon->data[i]);
274
275			free(icon->data);
276			}
277
278			icon++;
279			}
280			}
281
282			GdkPixbuf *icon_get(int type, int num) {
283			if(num < 0) return NULL;
284			if(num >= icons[type].count) return NULL;
285
286			return icons[type].data[num];
287			}
288
289			GtkWidget *icon_get_widget(int type, int num) {
290			GdkPixbuf *pbuf = icon_get(type, num);
291			if(!pbuf) return NULL;
292
293			return gtk_image_new_from_pixbuf(pbuf);
294			}
295
296	harbaum	293	/* routine to overlay two pixbufs */
297			GdkPixbuf pixbuf_overlay(GdkPixbuf bot, GdkPixbuf *top) {
298			GdkPixbuf *pix = gdk_pixbuf_copy(bot);
299
300			gdk_pixbuf_composite(top, pix,
301			0, 0, gdk_pixbuf_get_width(bot), gdk_pixbuf_get_height(bot),
302			0.0, 0.0, 1.0, 1.0, GDK_INTERP_NEAREST, 255);
303
304			return pix;
305			}
306
307			GtkWidget *icon_get_widget_ovl(int type, int num, int ovl) {
308			GdkPixbuf *pbuf0 = icon_get(type, num);
309			GdkPixbuf *pbuf1 = icon_get(type, ovl);
310			if(!pbuf0 \|\| !pbuf1) return NULL;
311
312			GdkPixbuf *pbuf = pixbuf_overlay(pbuf0, pbuf1);
313			GtkWidget *widget = gtk_image_new_from_pixbuf(pbuf);
314
315			/* widget now holds a reference */
316			gdk_pixbuf_unref(pbuf);
317
318			return widget;
319			}
320
321	harbaum	1	GdkPixbuf *icon_bearing(pos_t from, pos_t to) {
322	harbaum	47	if(isnan(from.lat) \|\| isnan(from.lon) \|\|
323			isnan(to.lat) \|\| isnan(to.lon))
324	harbaum	1	return icon_get(ICON_HEADING, 8);
325
326			int idx = (gpx_pos_get_bearing(from, to)+22.5)/45.0;
327
328			/* make sure we stay in icon bounds */
329			if(idx < 0) idx += 8;
330			if(idx > 7) idx -= 8;
331			return icon_get(ICON_HEADING, idx);
332			}
333