Pileus Git - grits/blob - src/plugins/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 "ridge.h"
  27 #include "data.h"
  28
  29 /****************
  30  * GObject code *
  31  ****************/
  32 /* Plugin init */
  33 static void aweather_ridge_plugin_init(AWeatherPluginInterface *iface);
  34 static void aweather_ridge_expose(AWeatherPlugin *_ridge);
  35 G_DEFINE_TYPE_WITH_CODE(AWeatherRidge, aweather_ridge, G_TYPE_OBJECT,
  36                 G_IMPLEMENT_INTERFACE(AWEATHER_TYPE_PLUGIN,
  37                         aweather_ridge_plugin_init));
  38 static void aweather_ridge_plugin_init(AWeatherPluginInterface *iface)
  39 {
  40         g_debug("AWeatherRidge: plugin_init");
  41         /* Add methods to the interface */
  42         iface->expose = aweather_ridge_expose;
  43 }
  44 /* Class/Object init */
  45 static void aweather_ridge_init(AWeatherRidge *ridge)
  46 {
  47         g_debug("AWeatherRidge: init");
  48         /* Set defaults */
  49         ridge->gui = NULL;
  50 }
  51 static void aweather_ridge_dispose(GObject *gobject)
  52 {
  53         g_debug("AWeatherRidge: dispose");
  54         AWeatherRidge *self = AWEATHER_RIDGE(gobject);
  55         /* Drop references */
  56         G_OBJECT_CLASS(aweather_ridge_parent_class)->dispose(gobject);
  57 }
  58 static void aweather_ridge_finalize(GObject *gobject)
  59 {
  60         g_debug("AWeatherRidge: finalize");
  61         AWeatherRidge *self = AWEATHER_RIDGE(gobject);
  62         /* Free data */
  63         G_OBJECT_CLASS(aweather_ridge_parent_class)->finalize(gobject);
  64
  65 }
  66 static void aweather_ridge_class_init(AWeatherRidgeClass *klass)
  67 {
  68         g_debug("AWeatherRidge: class_init");
  69         GObjectClass *gobject_class = (GObjectClass*)klass;
  70         gobject_class->dispose  = aweather_ridge_dispose;
  71         gobject_class->finalize = aweather_ridge_finalize;
  72 }
  73
  74 /*********************
  75  * Overlay constants *
  76  *********************/
  77 enum {
  78         LAYER_TOPO,
  79         LAYER_COUNTY,
  80         LAYER_RIVERS,
  81         LAYER_HIGHWAYS,
  82         LAYER_CITY,
  83         LAYER_COUNT
  84 };
  85
  86 typedef struct {
  87         gchar *name;
  88         gchar *fmt;
  89         gboolean enabled;
  90         float z;
  91         guint tex;
  92 } layer_t;
  93
  94 static layer_t layers[] = {
  95         [LAYER_TOPO]     = {"Topo",     "Overlays/Topo/Short/%s_Topo_Short.jpg",         TRUE,  1, 0},
  96         [LAYER_COUNTY]   = {"Counties", "Overlays/County/Short/%s_County_Short.gif",     TRUE,  3, 0},
  97         [LAYER_RIVERS]   = {"Rivers",   "Overlays/Rivers/Short/%s_Rivers_Short.gif",     FALSE, 4, 0},
  98         [LAYER_HIGHWAYS] = {"Highways", "Overlays/Highways/Short/%s_Highways_Short.gif", FALSE, 5, 0},
  99         [LAYER_CITY]     = {"Cities",   "Overlays/Cities/Short/%s_City_Short.gif",       TRUE,  6, 0},
 100 };
 101
 102
 103 /***********
 104  * Helpers *
 105  ***********/
 106 /*
 107  * Load an image into an OpenGL texture
 108  * \param  filename  Path to the image file
 109  * \return The OpenGL identifier for the texture
 110  */
 111 void load_texture(AWeatherRidge *self, layer_t *layer, gchar *filename)
 112 {
 113         GisOpenGL *opengl = aweather_gui_get_opengl(self->gui);
 114         gis_opengl_begin(opengl);
 115
 116         /* Load image */
 117         GError *error = NULL;
 118         GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file(filename, &error);
 119         if (!pixbuf || error) {
 120                 g_warning("Failed to load texture: %s", filename);
 121                 return;
 122         }
 123         guchar    *pixels = gdk_pixbuf_get_pixels(pixbuf);
 124         int        width  = gdk_pixbuf_get_width(pixbuf);
 125         int        height = gdk_pixbuf_get_height(pixbuf);
 126         int        format = gdk_pixbuf_get_has_alpha(pixbuf) ? GL_RGBA : GL_RGB;
 127
 128         /* Create Texture */
 129         glDeleteTextures(1, &layer->tex);
 130         glGenTextures(1, &layer->tex);
 131         glBindTexture(GL_TEXTURE_2D, layer->tex); // 2d texture (x and y size)
 132
 133         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 134         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
 135                         format, GL_UNSIGNED_BYTE, pixels);
 136         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 137         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 138
 139         char *base = g_path_get_basename(filename);
 140         g_debug("AWeatherRidge: load_texture - "
 141                 "w=%-3d  h=%-3d  fmt=%x  px=(%02x,%02x,%02x,%02x)  img=%s",
 142                 width, height, format, pixels[0], pixels[1], pixels[2], pixels[3],
 143                 base);
 144         g_free(base);
 145
 146         gis_opengl_end(opengl);
 147
 148         g_object_unref(pixbuf);
 149
 150         /* Redraw */
 151         gis_opengl_redraw(opengl);
 152 }
 153
 154
 155 /*****************
 156  * ASync helpers *
 157  *****************/
 158 typedef struct {
 159         AWeatherRidge *self;
 160         layer_t *layer;
 161 } cached_t;
 162 void cached_cb(gchar *filename, gboolean updated, gpointer _udata)
 163 {
 164         cached_t *udata = _udata;
 165         load_texture(udata->self, udata->layer, filename);
 166         g_free(udata);
 167 }
 168
 169 /*************
 170  * callbacks *
 171  *************/
 172 static void on_site_changed(GisView *view, gchar *site, AWeatherRidge *self)
 173 {
 174         g_debug("AWeatherRidge: on_site_changed - site=%s", site);
 175         for (int i = 0; i < LAYER_COUNT; i++) {
 176                 gchar *base = "http://radar.weather.gov/ridge/";
 177                 gchar *path  = g_strdup_printf(layers[i].fmt, site+1);
 178                 cached_t *udata = g_malloc(sizeof(cached_t));
 179                 udata->self  = self;
 180                 udata->layer = &layers[i];
 181                 cache_file(base, path, AWEATHER_ONCE, NULL, cached_cb, udata);
 182                 //cache_file(base, path, AWEATHER_UPDATE, cached_cb, udata);
 183                 g_free(path);
 184         }
 185 }
 186
 187 void toggle_layer(GtkToggleButton *check, AWeatherRidge *self)
 188 {
 189         layer_t *layer = g_object_get_data(G_OBJECT(check), "layer");
 190         layer->enabled = gtk_toggle_button_get_active(check);
 191         gis_opengl_redraw(aweather_gui_get_opengl(self->gui));
 192 }
 193
 194 /***********
 195  * Methods *
 196  ***********/
 197 AWeatherRidge *aweather_ridge_new(AWeatherGui *gui)
 198 {
 199         AWeatherRidge *self = g_object_new(AWEATHER_TYPE_RIDGE, NULL);
 200         self->gui = gui;
 201
 202         GisView   *view    = aweather_gui_get_view(gui);
 203         GtkWidget *drawing = aweather_gui_get_widget(gui, "drawing");
 204         GtkWidget *config  = aweather_gui_get_widget(gui, "tabs");
 205         g_debug("config = %p", aweather_gui_get_widget(gui, "tabs"));
 206
 207         /* Add configuration tab */
 208         GtkWidget *tab  = gtk_label_new("Ridge");
 209         GtkWidget *body = gtk_alignment_new(0.5, 0, 0, 0);
 210         GtkWidget *hbox = gtk_hbox_new(FALSE, 10);
 211         for (int i = 0; i < LAYER_COUNT; i++) {
 212                 GtkWidget *check = gtk_check_button_new_with_label(layers[i].name);
 213                 gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(check), layers[i].enabled);
 214                 gtk_box_pack_start(GTK_BOX(hbox), check, FALSE, TRUE, 0);
 215                 g_object_set_data(G_OBJECT(check), "layer", &layers[i]);
 216                 g_signal_connect(check, "toggled", G_CALLBACK(toggle_layer), self);
 217         }
 218         gtk_container_add(GTK_CONTAINER(body), hbox);
 219         gtk_notebook_append_page(GTK_NOTEBOOK(config), body, tab);
 220
 221         g_signal_connect(view, "site-changed", G_CALLBACK(on_site_changed), self);
 222         on_site_changed(view, gis_view_get_site(view), self);
 223
 224         return self;
 225 }
 226
 227 static void aweather_ridge_expose(AWeatherPlugin *_ridge)
 228 {
 229         AWeatherRidge *ridge = AWEATHER_RIDGE(_ridge);
 230
 231         g_debug("AWeatherRidge: expose");
 232         glPushMatrix();
 233         glEnable(GL_TEXTURE_2D);
 234         glColor4f(1,1,1,1);
 235
 236         for (int i = 0; i < LAYER_COUNT; i++) {
 237                 if (!layers[i].enabled)
 238                         continue;
 239                 glBindTexture(GL_TEXTURE_2D, layers[i].tex);
 240                 glBegin(GL_POLYGON);
 241                 glTexCoord2f(0.0, 0.0); glVertex3f(240*1000*-1.0, 282*1000* 1.0, layers[i].z);
 242                 glTexCoord2f(0.0, 1.0); glVertex3f(240*1000*-1.0, 282*1000*-1.0, layers[i].z);
 243                 glTexCoord2f(1.0, 1.0); glVertex3f(240*1000* 1.0, 282*1000*-1.0, layers[i].z);
 244                 glTexCoord2f(1.0, 0.0); glVertex3f(240*1000* 1.0, 282*1000* 1.0, layers[i].z);
 245                 glEnd();
 246         }
 247
 248         glPopMatrix();
 249 }