Pileus Git - aweather/blob - src/plugin-ridge.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 <config.h>
  19 #include <gtk/gtk.h>
  20 #include <curl/curl.h>
  21 #include <GL/gl.h>
  22
  23 #include <stdio.h>
  24
  25 #include "aweather-gui.h"
  26 #include "plugin-ridge.h"
  27 #include "data.h"
  28
  29 /****************
  30  * GObject code *
  31  ****************/
  32 static void aweather_ridge_plugin_init(AWeatherPluginInterface *iface);
  33 static void aweather_ridge_expose(AWeatherPlugin *_ridge);
  34 G_DEFINE_TYPE_WITH_CODE(AWeatherRidge, aweather_ridge, G_TYPE_OBJECT,
  35                 G_IMPLEMENT_INTERFACE(AWEATHER_TYPE_PLUGIN,
  36                         aweather_ridge_plugin_init));
  37 static void aweather_ridge_class_init(AWeatherRidgeClass *klass)
  38 {
  39         GObjectClass *object_class = (GObjectClass*)klass;
  40 }
  41 static void aweather_ridge_plugin_init(AWeatherPluginInterface *iface)
  42 {
  43         /* Add methods to the interface */
  44         iface->expose = aweather_ridge_expose;
  45 }
  46 static void aweather_ridge_init(AWeatherRidge *ridge)
  47 {
  48         /* Set defaults */
  49         ridge->gui = NULL;
  50 }
  51
  52
  53 /***********
  54  * Helpers *
  55  ***********/
  56 enum {
  57         LAYER_TOPO,
  58         LAYER_COUNTY,
  59         LAYER_RIVERS,
  60         LAYER_HIGHWAYS,
  61         LAYER_CITY,
  62         LAYER_COUNT
  63 };
  64
  65 typedef struct {
  66         gchar *name;
  67         gchar *fmt;
  68         gboolean enabled;
  69         float z;
  70         guint tex;
  71 } layer_t;
  72
  73 static layer_t layers[] = {
  74         [LAYER_TOPO]     = {"Topo",     "Overlays/Topo/Short/%s_Topo_Short.jpg",         TRUE,  1, 0},
  75         [LAYER_COUNTY]   = {"Counties", "Overlays/County/Short/%s_County_Short.gif",     TRUE,  3, 0},
  76         [LAYER_RIVERS]   = {"Rivers",   "Overlays/Rivers/Short/%s_Rivers_Short.gif",     FALSE, 4, 0},
  77         [LAYER_HIGHWAYS] = {"Highways", "Overlays/Highways/Short/%s_Highways_Short.gif", FALSE, 5, 0},
  78         [LAYER_CITY]     = {"Cities",   "Overlays/Cities/Short/%s_City_Short.gif",       TRUE,  6, 0},
  79 };
  80
  81 /* TODO: Remove this */
  82 AWeatherGui *old_gui = NULL;
  83
  84 /**
  85  * Load an image into an OpenGL texture
  86  * \param  filename  Path to the image file
  87  * \return The OpenGL identifier for the texture
  88  */
  89 void load_texture(gchar *filename, gboolean updated, gpointer _layer)
  90 {
  91         layer_t *layer = _layer;
  92         aweather_gui_gl_begin(old_gui);
  93
  94         /* Load image */
  95         GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file(filename, NULL);
  96         if (!pixbuf)
  97                 g_warning("Failed to load texture: %s", filename);
  98         guchar    *pixels = gdk_pixbuf_get_pixels(pixbuf);
  99         int        width  = gdk_pixbuf_get_width(pixbuf);
 100         int        height = gdk_pixbuf_get_height(pixbuf);
 101         int        format = gdk_pixbuf_get_has_alpha(pixbuf) ? GL_RGBA : GL_RGB;
 102
 103         /* Create Texture */
 104         glDeleteTextures(1, &layer->tex);
 105         glGenTextures(1, &layer->tex);
 106         glBindTexture(GL_TEXTURE_2D, layer->tex); // 2d texture (x and y size)
 107
 108         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 109         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
 110                         format, GL_UNSIGNED_BYTE, pixels);
 111         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 112         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 113
 114         char *base = g_path_get_basename(filename);
 115         g_message("loaded image:  w=%-3d  h=%-3d  fmt=%x  px=(%02x,%02x,%02x,%02x)  img=%s",
 116                 width, height, format, pixels[0], pixels[1], pixels[2], pixels[3],
 117                 base);
 118         g_free(base);
 119
 120         aweather_gui_gl_end(old_gui);
 121
 122         g_object_unref(pixbuf);
 123
 124         /* Redraw */
 125         aweather_gui_gl_redraw(old_gui);
 126 }
 127
 128 static void set_site(AWeatherView *view, gchar *site, AWeatherRidge *ridge)
 129 {
 130         g_message("site changed to %s", site);
 131         for (int i = 0; i < LAYER_COUNT; i++) {
 132                 gchar *base = "http://radar.weather.gov/ridge/";
 133                 gchar *path  = g_strdup_printf(layers[i].fmt, site);
 134                 cache_file(base, path, AWEATHER_NEVER, load_texture, &layers[i]);
 135                 g_free(path);
 136         }
 137 }
 138
 139 void toggle_layer(GtkToggleButton *check, gpointer _layer)
 140 {
 141         layer_t *layer = _layer;
 142         layer->enabled = gtk_toggle_button_get_active(check);
 143         aweather_gui_gl_redraw(old_gui);
 144 }
 145
 146 /***********
 147  * Methods *
 148  ***********/
 149 AWeatherRidge *aweather_ridge_new(AWeatherGui *gui)
 150 {
 151         AWeatherRidge *ridge = g_object_new(AWEATHER_TYPE_RIDGE, NULL);
 152         ridge->gui = old_gui = gui;
 153
 154         AWeatherView *view    = aweather_gui_get_view(gui);
 155         GtkWidget    *drawing = aweather_gui_get_widget(gui, "drawing");
 156         GtkWidget    *config  = aweather_gui_get_widget(gui, "tabs");
 157
 158         /* Add configuration tab */
 159         GtkWidget *tab  = gtk_label_new("Ridge");
 160         GtkWidget *body = gtk_alignment_new(0.5, 0, 0, 0);
 161         GtkWidget *hbox = gtk_hbox_new(FALSE, 10);
 162         for (int i = 0; i < LAYER_COUNT; i++) {
 163                 GtkWidget *check = gtk_check_button_new_with_label(layers[i].name);
 164                 gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(check), layers[i].enabled);
 165                 gtk_box_pack_start(GTK_BOX(hbox), check, FALSE, TRUE, 0);
 166                 g_signal_connect(check, "toggled", G_CALLBACK(toggle_layer), &layers[i]);
 167         }
 168         gtk_container_add(GTK_CONTAINER(body), hbox);
 169         gtk_notebook_append_page(GTK_NOTEBOOK(config), body, tab);
 170
 171         g_signal_connect(view,    "site-changed", G_CALLBACK(set_site),  ridge);
 172
 173         return ridge;
 174 }
 175
 176 static void aweather_ridge_expose(AWeatherPlugin *_ridge)
 177 {
 178         AWeatherRidge *ridge = AWEATHER_RIDGE(_ridge);
 179
 180         g_message("ridge:expose");
 181         glPushMatrix();
 182         glEnable(GL_TEXTURE_2D);
 183         glColor4f(1,1,1,1);
 184
 185         for (int i = 0; i < LAYER_COUNT; i++) {
 186                 if (!layers[i].enabled)
 187                         continue;
 188                 glBindTexture(GL_TEXTURE_2D, layers[i].tex);
 189                 glBegin(GL_POLYGON);
 190                 glTexCoord2f(0.0, 0.0); glVertex3f(240*1000*-1.0, 282*1000* 1.0, layers[i].z);
 191                 glTexCoord2f(0.0, 1.0); glVertex3f(240*1000*-1.0, 282*1000*-1.0, layers[i].z);
 192                 glTexCoord2f(1.0, 1.0); glVertex3f(240*1000* 1.0, 282*1000*-1.0, layers[i].z);
 193                 glTexCoord2f(1.0, 0.0); glVertex3f(240*1000* 1.0, 282*1000* 1.0, layers[i].z);
 194                 glEnd();
 195         }
 196
 197         glPopMatrix();
 198 }