]> Pileus Git - grits/blob - src/plugins/env.c
Fix various memory leaks, mostly in plugins
[grits] / src / plugins / env.c
1 /*
2  * Copyright (C) 2009-2010 Andy Spencer <andy753421@gmail.com>
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 <math.h>
19 #include <gtk/gtkgl.h>
20 #include <GL/gl.h>
21
22 #include <gis.h>
23
24 #include "env.h"
25
26 /***********
27  * Helpers *
28  ***********/
29 static gpointer expose(GisCallback *callback, gpointer _self)
30 {
31         GisPluginEnv *self = GIS_PLUGIN_ENV(_self);
32         g_debug("GisPluginEnv: expose");
33
34         gdouble lat, lon, elev;
35         gis_viewer_get_location(self->viewer, &lat, &lon, &elev);
36
37         /* Misc */
38         gdouble rg   = MAX(0, 1-(elev/20000));
39         gdouble blue = MAX(0, 1-(elev/50000));
40         glClearColor(MIN(0.65,rg), MIN(0.65,rg), MIN(1,blue), 1.0f);
41         glClear(GL_COLOR_BUFFER_BIT);
42
43         /* Attempt to render an atmosphere */
44         /*
45         glEnable(GL_COLOR_MATERIAL);
46         glDisable(GL_CULL_FACE);
47         glDisable(GL_LIGHTING);
48
49         glBlendFunc(GL_ONE, GL_ONE);
50
51         glMatrixMode(GL_MODELVIEW);
52
53         elev = -EARTH_R;
54         for (elev = -EARTH_R; elev < 0; elev += EARTH_R/10) {
55                 glPushMatrix();
56                 glColor4f(0.3, 0.3, 1.0, 0.2);
57                 gis_viewer_center_position(self->viewer, lat, lon, elev);
58
59                 glBegin(GL_TRIANGLE_FAN);
60                 glVertex3f(0, 0, 0);
61                 for (gdouble i = 0; i <= 2*G_PI; i += G_PI/10) {
62                         gint rad = 1*EARTH_R + 300000;
63                         glVertex3f(rad*sin(i), rad*cos(i), 0);
64                         g_message("%f %f %f", 3*EARTH_R*sin(i), 3*EARTH_R*cos(i), 0.);
65                 }
66                 glEnd();
67                 glPopMatrix();
68         }
69         */
70
71         return NULL;
72 }
73
74
75 /***********
76  * Methods *
77  ***********/
78 GisPluginEnv *gis_plugin_env_new(GisViewer *viewer, GisPrefs *prefs)
79 {
80         g_debug("GisPluginEnv: new");
81         GisPluginEnv *self = g_object_new(GIS_TYPE_PLUGIN_ENV, NULL);
82         self->viewer = g_object_ref(viewer);
83
84         /* Create objects */
85         GisCallback *callback   = gis_callback_new(expose, self);
86         GisTile     *background = gis_tile_new(NULL, NORTH, SOUTH, EAST, WEST);
87         glGenTextures(1, &self->tex);
88         background->data = &self->tex;
89
90         /* Add renderers */
91         gpointer ref1, ref2;
92         ref1 = gis_viewer_add(viewer, GIS_OBJECT(callback),   GIS_LEVEL_BACKGROUND, FALSE);
93         ref2 = gis_viewer_add(viewer, GIS_OBJECT(background), GIS_LEVEL_BACKGROUND, FALSE);
94         self->refs = g_list_prepend(self->refs, ref1);
95         self->refs = g_list_prepend(self->refs, ref2);
96
97         return self;
98 }
99
100
101 /****************
102  * GObject code *
103  ****************/
104 /* Plugin init */
105 static void gis_plugin_env_plugin_init(GisPluginInterface *iface);
106 G_DEFINE_TYPE_WITH_CODE(GisPluginEnv, gis_plugin_env, G_TYPE_OBJECT,
107                 G_IMPLEMENT_INTERFACE(GIS_TYPE_PLUGIN,
108                         gis_plugin_env_plugin_init));
109 static void gis_plugin_env_plugin_init(GisPluginInterface *iface)
110 {
111         g_debug("GisPluginEnv: plugin_init");
112         /* Add methods to the interface */
113 }
114 /* Class/Object init */
115 static void gis_plugin_env_init(GisPluginEnv *self)
116 {
117         g_debug("GisPluginEnv: init");
118         /* Set defaults */
119 }
120 static void gis_plugin_env_dispose(GObject *gobject)
121 {
122         g_debug("GisPluginEnv: dispose");
123         GisPluginEnv *self = GIS_PLUGIN_ENV(gobject);
124         /* Drop references */
125         if (self->viewer) {
126                 for (GList *cur = self->refs; cur; cur = cur->next)
127                         gis_viewer_remove(self->viewer, cur->data);
128                 g_list_free(self->refs);
129                 g_object_unref(self->viewer);
130                 glDeleteTextures(1, &self->tex);
131                 self->viewer = NULL;
132         }
133         G_OBJECT_CLASS(gis_plugin_env_parent_class)->dispose(gobject);
134 }
135 static void gis_plugin_env_class_init(GisPluginEnvClass *klass)
136 {
137         g_debug("GisPluginEnv: class_init");
138         GObjectClass *gobject_class = (GObjectClass*)klass;
139         gobject_class->dispose = gis_plugin_env_dispose;
140 }