Pileus Git - grits/blob - examples/plugin/teapot.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 <gtk/gtkgl.h>
  19 #include <GL/gl.h>
  20
  21 #include <gis/gis.h>
  22
  23 #include "teapot.h"
  24
  25 /***********
  26  * Helpers *
  27  ***********/
  28 static gboolean rotate(gpointer _self)
  29 {
  30         GisPluginTeapot *self = _self;
  31         if (gtk_toggle_button_get_active(self->button)) {
  32                 self->rotation += 1.0;
  33                 gtk_widget_queue_draw(GTK_WIDGET(self->viewer));
  34         }
  35         return TRUE;
  36 }
  37
  38
  39 /***********
  40  * Methods *
  41  ***********/
  42 GisPluginTeapot *gis_plugin_teapot_new(GisViewer *viewer, GisPrefs *prefs)
  43 {
  44         g_debug("GisPluginTeapot: new");
  45         GisPluginTeapot *self = g_object_new(GIS_TYPE_PLUGIN_TEAPOT, NULL);
  46         self->viewer = viewer;
  47         return self;
  48 }
  49
  50 static GtkWidget *gis_plugin_teapot_get_config(GisPlugin *_self)
  51 {
  52         GisPluginTeapot *self = GIS_PLUGIN_TEAPOT(_self);
  53         return GTK_WIDGET(self->button);
  54 }
  55
  56 static void gis_plugin_teapot_expose(GisPlugin *_self)
  57 {
  58         GisPluginTeapot *self = GIS_PLUGIN_TEAPOT(_self);
  59         g_debug("GisPluginTeapot: expose");
  60
  61         glMatrixMode(GL_PROJECTION);
  62         glLoadIdentity();
  63         glOrtho(1,-1, -1,1, -10,10);
  64
  65         glMatrixMode(GL_MODELVIEW);
  66         glLoadIdentity();
  67
  68         float light_ambient[]  = {0.1f, 0.1f, 0.0f, 1.0f};
  69         float light_diffuse[]  = {0.9f, 0.9f, 0.9f, 1.0f};
  70         float light_position[] = {-30.0f, 50.0f, 40.0f, 1.0f};
  71         glLightfv(GL_LIGHT0, GL_AMBIENT,  light_ambient);
  72         glLightfv(GL_LIGHT0, GL_DIFFUSE,  light_diffuse);
  73         glLightfv(GL_LIGHT0, GL_POSITION, light_position);
  74         glEnable(GL_COLOR_MATERIAL);
  75
  76         glTranslatef(-0.5, -0.5, -2);
  77         glRotatef(self->rotation, 1, 1, 0);
  78         glColor4f(0.9, 0.9, 0.7, 1.0);
  79         glDisable(GL_CULL_FACE);
  80         gdk_gl_draw_teapot(TRUE, 0.25);
  81 }
  82
  83
  84 /****************
  85  * GObject code *
  86  ****************/
  87 /* Plugin init */
  88 static void gis_plugin_teapot_plugin_init(GisPluginInterface *iface);
  89 G_DEFINE_TYPE_WITH_CODE(GisPluginTeapot, gis_plugin_teapot, G_TYPE_OBJECT,
  90                 G_IMPLEMENT_INTERFACE(GIS_TYPE_PLUGIN,
  91                         gis_plugin_teapot_plugin_init));
  92 static void gis_plugin_teapot_plugin_init(GisPluginInterface *iface)
  93 {
  94         g_debug("GisPluginTeapot: plugin_init");
  95         /* Add methods to the interface */
  96         iface->expose     = gis_plugin_teapot_expose;
  97         iface->get_config = gis_plugin_teapot_get_config;
  98 }
  99 /* Class/Object init */
 100 static void gis_plugin_teapot_init(GisPluginTeapot *self)
 101 {
 102         g_debug("GisPluginTeapot: init");
 103         /* Set defaults */
 104         self->button    = GTK_TOGGLE_BUTTON(gtk_toggle_button_new_with_label("Rotate"));
 105         self->rotate_id = g_timeout_add(1000/60, rotate, self);
 106         self->rotation  = 30.0;
 107 }
 108 static void gis_plugin_teapot_dispose(GObject *gobject)
 109 {
 110         g_debug("GisPluginTeapot: dispose");
 111         GisPluginTeapot *self = GIS_PLUGIN_TEAPOT(gobject);
 112         g_source_remove(self->rotate_id);
 113         /* Drop references */
 114         G_OBJECT_CLASS(gis_plugin_teapot_parent_class)->dispose(gobject);
 115 }
 116 static void gis_plugin_teapot_class_init(GisPluginTeapotClass *klass)
 117 {
 118         g_debug("GisPluginTeapot: class_init");
 119         GObjectClass *gobject_class = (GObjectClass*)klass;
 120         gobject_class->dispose  = gis_plugin_teapot_dispose;
 121 }