trunk/src/icons.c

/*
 * Copyright (C) 2008 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, 46 },                           /* 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

  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[] = {
  "locked", "unlocked", "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, "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			* Copyright (C) 2008 Till Harbaum <till@harbaum.org>.
3			*
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	293	{ NULL, 46 }, /* 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
57			NULL
58			};
59
60	harbaum	174	/* ICON_CACHE_TYPE / ICON_CACHE_TYPE_SEMI / ICON_CACHE_TYPE_2X */
61	harbaum	1	const char *cache_type_icon_name[] = {
62			"traditional", "multi", "mystery", "virtual", "webcam", "event",
63	harbaum	188	"letterbox", "earthcache", "wherigo", "megaevent", "cito",
64
65			/* special overlays */
66	harbaum	205	"ovl_override", "ovl_found", "ovl_note", "ovl_mine",
67	harbaum	189
68			NULL
69	harbaum	1	};
70
71			/* ICON_CACHE_SIZE */
72			const char *cache_size_icon_name[] = {
73			"regular", "small", "micro", "other", "not_chosen", "large",
74	harbaum	189	"virtual", NULL
75	harbaum	1	};
76
77			/* ICON_STARS */
78			const char *stars_icon_name[] = {
79	harbaum	189	"1", "1_5", "2", "2_5", "3", "3_5", "4", "4_5", "5", NULL
80	harbaum	1	};
81
82			/* ICON_LOG */
83			const char *log_icon_name[] = {
84			"smile", "sad", "maint", "note", "big_smile", "enabled",
85			"greenlight", "rsvp", "attended", "camera", "disabled",
86			"needsmaint", "coord_update",
87			"traffic_cone",
88			"traffic_cone", /* LOG_TYPE_NEEDS_ARCHIVED */
89	harbaum	189	"traffic_cone",
90			NULL
91	harbaum	1	};
92
93			/* ICON_HEADING */
94			const char *heading_icon_name[] = {
95	harbaum	189	"n", "ne", "e", "se", "s", "sw", "w", "nw", "none", NULL
96	harbaum	1	};
97
98			/* ICON_WPT */
99			const char *wpt_sym_icon_name[] = {
100			"multistage", "parking", "final", "question",
101	harbaum	189	"trailhead", "refpoint", NULL
102	harbaum	1	};
103
104			/* ICON_TB */
105			const char *tb_icon_name[] = {
106	harbaum	189	"tb", "coin", NULL
107	harbaum	1	};
108
109			/* ICON_MISC */
110			const char *misc_icon_name[] = {
111	harbaum	231	"locked", "unlocked", "delete",
112	harbaum	229	#ifdef FREMANTLE
113			"64x64/paypal",
114			#else
115			"32x32/paypal",
116			#endif
117			"32x32/pos_geomath",
118			#ifdef FREMANTLE
119			"64x64/gpxview",
120			#else
121			"32x32/gpxview",
122			#endif
123	harbaum	246	#ifndef USE_MAEMO
124			"16x16/speaker", "16x16/speaker_off",
125			#else
126			#ifndef FREMANTLE
127			"24x24/speaker", "24x24/speaker_off",
128			#else
129			"32x32/speaker", "32x32/speaker_off",
130			#endif
131			#endif
132
133	harbaum	213	NULL
134	harbaum	1	};
135
136	harbaum	213	/* ICON_POS */
137			const char *pos_icon_name[] = {
138	harbaum	214	"wpt_multistage", "wpt_parking", "wpt_final",
139			"wpt_question", "wpt_trailhead", "wpt_refpoint",
140	harbaum	213
141	harbaum	214	"cache_type_traditional", "cache_type_multi", "cache_type_mystery",
142			"cache_type_virtual", "cache_type_webcam", "cache_type_event",
143			"cache_type_letterbox", "cache_type_earthcache", "cache_type_wherigo",
144			"cache_type_megaevent", "cache_type_cito",
145
146	harbaum	231	"pos_wpt", "pos_gps", "pos_geomath", "pos_map", "pos_home",
147
148	harbaum	249	"pos_get", "pos_set", "maemo-mapper", "clipboard",
149	harbaum	231
150	harbaum	213	NULL
151			};
152
153	harbaum	1	/* ICON_FILE */
154			const char *file_icon_name[] = {
155	harbaum	189	"gc", "folder", "zip", NULL
156	harbaum	1	};
157
158			static void icons_load(int type, char format, const char names[]) {
159			int i;
160
161			if(!icons[type].count) {
162			icons[type].data = NULL;
163			return;
164			}
165
166			icons[type].data = malloc(sizeof(GdkPixbuf ) icons[type].count);
167
168			for(i=0;i<icons[type].count;i++) {
169	harbaum	189	g_assert(names[i]);
170	harbaum	1
171	harbaum	189	GError *error = NULL;
172			char filename[128];
173			strcpy(filename, ICONPATH);
174			snprintf(filename+strlen(filename),
175			sizeof(filename)-strlen(filename), format, names[i], "png");
176			icons[type].data[i] = gdk_pixbuf_new_from_file(filename, &error);
177
178			if(error) {
179			error = NULL;
180			/* try again in local dir */
181			strcpy(filename, "./data/icons/");
182			snprintf(filename+strlen(filename),
183			sizeof(filename)-strlen(filename), format, names[i], "png");
184			icons[type].data[i] = gdk_pixbuf_new_from_file(filename, &error);
185
186	harbaum	1	if(error) {
187	harbaum	189	icons[type].data[i] = NULL;
188	harbaum	293	g_warning("Could not load icon %s: %s\n", names[i], error->message);
189	harbaum	189	g_error_free(error);
190	harbaum	1	error = NULL;
191	harbaum	189	}
192			}
193	harbaum	1	}
194	harbaum	214
195	harbaum	189	g_assert(!names[i]);
196	harbaum	1	}
197
198			void icons_init(void) {
199
200			/* load cache type icons */
201	harbaum	180	icons_load(ICON_CACHE_TYPE, "32x32/cache_type_%s.%s", cache_type_icon_name);
202	harbaum	1
203	harbaum	174	/* load semitransparent cache type icons */
204	harbaum	180	icons_load(ICON_CACHE_TYPE_SEMI, "32x32/cache_type_%s_semi.%s", cache_type_icon_name);
205	harbaum	151
206	harbaum	176	/* load 150% sized cache type icons */
207	harbaum	180	icons_load(ICON_CACHE_TYPE_1_5X, "48x48/cache_type_%s.%s", cache_type_icon_name);
208	harbaum	176
209	harbaum	174	/* load double sized cache type icons */
210	harbaum	180	icons_load(ICON_CACHE_TYPE_2X, "64x64/cache_type_%s.%s", cache_type_icon_name);
211	harbaum	174
212	harbaum	1	/* load cache container/size icons */
213	harbaum	187	#if !defined(USE_MAEMO) \|\| (MAEMO_VERSION_MAJOR < 5)
214	harbaum	185	icons_load(ICON_CACHE_SIZE, "45x12/cache_size_%s.%s", cache_size_icon_name);
215	harbaum	187	#else
216			icons_load(ICON_CACHE_SIZE, "90x24/cache_size_%s.%s", cache_size_icon_name);
217			#endif
218	harbaum	1
219	harbaum	180	/* load cache difficulty/terrain/quality icons */
220	harbaum	187	#if !defined(USE_MAEMO) \|\| (MAEMO_VERSION_MAJOR < 5)
221			icons_load(ICON_STARS, "12x12/stars%s.%s", stars_icon_name);
222			#else
223			icons_load(ICON_STARS, "16x16/stars%s.%s", stars_icon_name);
224			#endif
225	harbaum	1
226	harbaum	180	/* load cache log icons */
227			icons_load(ICON_LOG, "32x32/log_icon_%s.%s", log_icon_name);
228	harbaum	1
229			/* load icons to visualize heading */
230	harbaum	187	#if !defined(USE_MAEMO) \|\| (MAEMO_VERSION_MAJOR < 5)
231			icons_load(ICON_HEADING, "32x32/heading_%s.%s", heading_icon_name);
232			#else
233			icons_load(ICON_HEADING, "48x48/heading_%s.%s", heading_icon_name);
234			#endif
235	harbaum	1
236	harbaum	187	/* load waypoint icons */
237	harbaum	184	icons_load(ICON_WPT, "32x32/wpt_%s.%s", wpt_sym_icon_name);
238	harbaum	1
239	harbaum	187	/* load travelbug/coin icons */
240	harbaum	180	icons_load(ICON_TB, "32x32/%s.%s", tb_icon_name);
241	harbaum	1
242			/* load misc icons */
243			icons_load(ICON_MISC, "%s.%s", misc_icon_name);
244
245	harbaum	213	/* load pos icons */
246	harbaum	242	#if !defined(USE_MAEMO)
247	harbaum	213	icons_load(ICON_POS, "16x16/%s.%s", pos_icon_name);
248	harbaum	214	#else
249	harbaum	242	#if (MAEMO_VERSION_MAJOR < 5)
250			icons_load(ICON_POS, "24x24/%s.%s", pos_icon_name);
251			#else
252	harbaum	214	icons_load(ICON_POS, "32x32/%s.%s", pos_icon_name);
253			#endif
254	harbaum	242	#endif
255	harbaum	213
256	harbaum	1	/* load file icons */
257			icons_load(ICON_FILE, "file_%s.%s", file_icon_name);
258	harbaum	293
259			/* load attribute icons */
260			icons_load(ICON_ATT, "32x32/att_%s.%s", att_icon_name);
261	harbaum	1	}
262
263			void icons_free(void) {
264			int i;
265			struct icon_data *icon = icons;
266
267			while(icon->count >= 0) {
268			if(icon->count) {
269			for(i=0;i<icon->count;i++)
270			if(icon->data[i])
271			gdk_pixbuf_unref(icon->data[i]);
272
273			free(icon->data);
274			}
275
276			icon++;
277			}
278			}
279
280			GdkPixbuf *icon_get(int type, int num) {
281			if(num < 0) return NULL;
282			if(num >= icons[type].count) return NULL;
283
284			return icons[type].data[num];
285			}
286
287			GtkWidget *icon_get_widget(int type, int num) {
288			GdkPixbuf *pbuf = icon_get(type, num);
289			if(!pbuf) return NULL;
290
291			return gtk_image_new_from_pixbuf(pbuf);
292			}
293
294	harbaum	293	/* routine to overlay two pixbufs */
295			GdkPixbuf pixbuf_overlay(GdkPixbuf bot, GdkPixbuf *top) {
296			GdkPixbuf *pix = gdk_pixbuf_copy(bot);
297
298			gdk_pixbuf_composite(top, pix,
299			0, 0, gdk_pixbuf_get_width(bot), gdk_pixbuf_get_height(bot),
300			0.0, 0.0, 1.0, 1.0, GDK_INTERP_NEAREST, 255);
301
302			return pix;
303			}
304
305			GtkWidget *icon_get_widget_ovl(int type, int num, int ovl) {
306			GdkPixbuf *pbuf0 = icon_get(type, num);
307			GdkPixbuf *pbuf1 = icon_get(type, ovl);
308			if(!pbuf0 \|\| !pbuf1) return NULL;
309
310			GdkPixbuf *pbuf = pixbuf_overlay(pbuf0, pbuf1);
311			GtkWidget *widget = gtk_image_new_from_pixbuf(pbuf);
312
313			/* widget now holds a reference */
314			gdk_pixbuf_unref(pbuf);
315
316			return widget;
317			}
318
319	harbaum	1	GdkPixbuf *icon_bearing(pos_t from, pos_t to) {
320	harbaum	47	if(isnan(from.lat) \|\| isnan(from.lon) \|\|
321			isnan(to.lat) \|\| isnan(to.lon))
322	harbaum	1	return icon_get(ICON_HEADING, 8);
323
324			int idx = (gpx_pos_get_bearing(from, to)+22.5)/45.0;
325
326			/* make sure we stay in icon bounds */
327			if(idx < 0) idx += 8;
328			if(idx > 7) idx -= 8;
329			return icon_get(ICON_HEADING, idx);
330			}
331