2 * Copyright (C) 2009 Andy Spencer <spenceal@rose-hulman.edu>
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.
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.
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/>.
20 #include <curl/curl.h>
25 #include "aweather-gui.h"
43 static layer_t layers[] = {
44 [LAYER_TOPO] = { "Overlays/" "Topo/" "Short/" "%s_Topo_Short.jpg", 1, 0 },
45 [LAYER_COUNTY] = { "Overlays/" "County/" "Short/" "%s_County_Short.gif", 3, 0 },
46 [LAYER_RIVERS] = { "Overlays/" "Rivers/" "Short/" "%s_Rivers_Short.gif", 4, 0 },
47 [LAYER_HIGHWAYS] = { "Overlays/" "Highways/" "Short/" "%s_Highways_Short.gif", 5, 0 },
48 [LAYER_CITY] = { "Overlays/" "Cities/" "Short/" "%s_City_Short.gif", 6, 0 },
51 static AWeatherGui *gui = NULL;
54 * Load an image into an OpenGL texture
55 * \param filename Path to the image file
56 * \return The OpenGL identifier for the texture
58 void load_texture(gchar *filename, gpointer _layer)
60 layer_t *layer = _layer;
61 aweather_gui_gl_begin(gui);
64 GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file(filename, NULL);
66 g_warning("Failed to load texture: %s", filename);
67 guchar *pixels = gdk_pixbuf_get_pixels(pixbuf);
68 int width = gdk_pixbuf_get_width(pixbuf);
69 int height = gdk_pixbuf_get_height(pixbuf);
70 int format = gdk_pixbuf_get_has_alpha(pixbuf) ? GL_RGBA : GL_RGB;
73 glGenTextures(1, &layer->tex);
74 glBindTexture(GL_TEXTURE_2D, layer->tex); // 2d texture (x and y size)
76 glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
77 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
78 format, GL_UNSIGNED_BYTE, pixels);
79 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
80 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
82 g_message("loaded image: w=%-3d h=%-3d fmt=%x px=(%02x,%02x,%02x,%02x) img=%s",
83 width, height, format, pixels[0], pixels[1], pixels[2], pixels[3],
84 g_path_get_basename(filename));
86 aweather_gui_gl_end(gui);
89 gtk_widget_queue_draw(aweather_gui_get_widget(gui, "drawing"));
92 static void set_site(AWeatherView *view, gchar *site, gpointer user_data)
94 g_message("location changed to %s", site);
95 for (int i = 0; i < LAYER_COUNT; i++) {
96 gchar *base = "http://radar.weather.gov/ridge/";
97 gchar *path = g_strdup_printf(layers[i].fmt, site);
98 cache_file(base, path, load_texture, &layers[i]);
103 static gboolean expose(GtkWidget *da, GdkEventExpose *event, gpointer user_data)
105 g_message("ridge:expose");
107 glEnable(GL_TEXTURE_2D);
110 for (int i = 0; i < LAYER_COUNT; i++) {
111 glBindTexture(GL_TEXTURE_2D, layers[i].tex);
114 glTexCoord2f(0.0, 0.0); glVertex3f(250*1000*-1.0, 250*1000* 1.0, layers[i].z);
115 glTexCoord2f(0.0, 1.0); glVertex3f(250*1000*-1.0, 250*1000*-1.0, layers[i].z);
116 glTexCoord2f(1.0, 1.0); glVertex3f(250*1000* 1.0, 250*1000*-1.0, layers[i].z);
117 glTexCoord2f(1.0, 0.0); glVertex3f(250*1000* 1.0, 250*1000* 1.0, layers[i].z);
125 gboolean ridge_init(AWeatherGui *_gui)
128 GtkDrawingArea *drawing = GTK_DRAWING_AREA(aweather_gui_get_widget(gui, "drawing"));
129 AWeatherView *view = aweather_gui_get_view(gui);
131 /* Set up OpenGL Stuff */
132 g_signal_connect(drawing, "expose-event", G_CALLBACK(expose), NULL);
133 g_signal_connect(view, "location-changed", G_CALLBACK(set_site), NULL);