Pileus Git - grits/blob - src/gis-object.c

   1 /*
   2  * Copyright (C) 2009 Andy Spencer <spenceal@rose-hulman.edu>
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include <glib.h>
  19 #include <GL/glu.h>
  20
  21 #include "gis-object.h"
  22 #include "gis-util.h"
  23
  24 /* GisPoint */
  25 GisPoint *gis_point_new()
  26 {
  27         return g_new0(GisPoint, 1);
  28 }
  29
  30 void gis_point_set_lle(GisPoint *self, gdouble lat, gdouble lon, gdouble elev)
  31 {
  32         self->lat  = lat;
  33         self->lon  = lon;
  34         self->elev = elev;
  35 }
  36
  37 void gis_point_free(GisPoint *self)
  38 {
  39         g_free(self);
  40 }
  41
  42
  43 /* GisMarker */
  44 GisMarker *gis_marker_new(const gchar *label)
  45 {
  46         static const int RADIUS =   4;
  47         static const int WIDTH  = 100;
  48         static const int HEIGHT =  20;
  49
  50         GisMarker *self = g_new0(GisMarker, 1);
  51         GIS_OBJECT(self)->type = GIS_TYPE_MARKER;
  52         self->xoff  = RADIUS;
  53         self->yoff  = HEIGHT-RADIUS;
  54         self->label = g_strdup(label);
  55         self->cairo = cairo_create(cairo_image_surface_create(
  56                                 CAIRO_FORMAT_ARGB32, WIDTH, HEIGHT));
  57         cairo_set_source_rgba(self->cairo, 1, 1, 1, 1);
  58         cairo_arc(self->cairo, self->xoff, self->yoff, RADIUS, 0, 2*G_PI);
  59         cairo_fill(self->cairo);
  60         cairo_move_to(self->cairo, self->xoff+4, self->yoff-8);
  61         cairo_set_font_size(self->cairo, 10);
  62         cairo_show_text(self->cairo, self->label);
  63         return self;
  64 }
  65
  66 void gis_marker_free(GisMarker *self)
  67 {
  68         cairo_surface_destroy(cairo_get_target(self->cairo));
  69         cairo_destroy(self->cairo);
  70         g_free(self->label);
  71         g_free(self);
  72 }
  73
  74
  75 /* GisCallback */
  76 GisCallback *gis_callback_new(GisCallbackFunc callback, gpointer user_data)
  77 {
  78         GisCallback *self = g_new0(GisCallback, 1);
  79         GIS_OBJECT(self)->type = GIS_TYPE_CALLBACK;
  80         self->callback  = callback;
  81         self->user_data = user_data;
  82         return self;
  83 }
  84
  85 void gis_callback_free(GisCallback *self)
  86 {
  87         g_free(self);
  88 }