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 <stdio.h>
  20 #include <gtk/gtk.h>
  21 #include <curl/curl.h>
  22 #include <GL/gl.h>
  23
  24 #include <gis/gis.h>
  25
  26 #include "ridge.h"
  27
  28 /****************
  29  * GObject code *
  30  ****************/
  31 /* Plugin init */
  32 static void gis_plugin_ridge_plugin_init(GisPluginInterface *iface);
  33 static void gis_plugin_ridge_expose(GisPlugin *_self);
  34 static GtkWidget *gis_plugin_ridge_get_config(GisPlugin *_self);
  35 G_DEFINE_TYPE_WITH_CODE(GisPluginRidge, gis_plugin_ridge, G_TYPE_OBJECT,
  36                 G_IMPLEMENT_INTERFACE(GIS_TYPE_PLUGIN,
  37                         gis_plugin_ridge_plugin_init));
  38 static void gis_plugin_ridge_plugin_init(GisPluginInterface *iface)
  39 {
  40         g_debug("GisPluginRidge: plugin_init");
  41         /* Add methods to the interface */
  42         iface->expose     = gis_plugin_ridge_expose;
  43         iface->get_config = gis_plugin_ridge_get_config;
  44 }
  45 /* Class/Object init */
  46 static void gis_plugin_ridge_init(GisPluginRidge *self)
  47 {
  48         g_debug("GisPluginRidge: init");
  49         /* Set defaults */
  50 }
  51 static void gis_plugin_ridge_dispose(GObject *gobject)
  52 {
  53         g_debug("GisPluginRidge: dispose");
  54         GisPluginRidge *self = GIS_PLUGIN_RIDGE(gobject);
  55         /* Drop references */
  56         G_OBJECT_CLASS(gis_plugin_ridge_parent_class)->dispose(gobject);
  57 }
  58 static void gis_plugin_ridge_finalize(GObject *gobject)
  59 {
  60         g_debug("GisPluginRidge: finalize");
  61         GisPluginRidge *self = GIS_PLUGIN_RIDGE(gobject);
  62         /* Free data */
  63         G_OBJECT_CLASS(gis_plugin_ridge_parent_class)->finalize(gobject);
  64
  65 }
  66 static void gis_plugin_ridge_class_init(GisPluginRidgeClass *klass)
  67 {
  68         g_debug("GisPluginRidge: class_init");
  69         GObjectClass *gobject_class = (GObjectClass*)klass;
  70         gobject_class->dispose  = gis_plugin_ridge_dispose;
  71         gobject_class->finalize = gis_plugin_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(GisPluginRidge *self, layer_t *layer, gchar *filename)
 112 {
 113         gis_opengl_begin(self->opengl);
 114
 115         /* Load image */
 116         GError *error = NULL;
 117         GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file(filename, &error);
 118         if (!pixbuf || error) {
 119                 g_warning("Failed to load texture: %s", filename);
 120                 return;
 121         }
 122         guchar    *pixels = gdk_pixbuf_get_pixels(pixbuf);
 123         int        width  = gdk_pixbuf_get_width(pixbuf);
 124         int        height = gdk_pixbuf_get_height(pixbuf);
 125         int        format = gdk_pixbuf_get_has_alpha(pixbuf) ? GL_RGBA : GL_RGB;
 126
 127         /* Create Texture */
 128         glDeleteTextures(1, &layer->tex);
 129         glGenTextures(1, &layer->tex);
 130         glBindTexture(GL_TEXTURE_2D, layer->tex); // 2d texture (x and y size)
 131
 132         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 133         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
 134                         format, GL_UNSIGNED_BYTE, pixels);
 135         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 136         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 137
 138         char *base = g_path_get_basename(filename);
 139         g_debug("GisPluginRidge: load_texture - "
 140                 "w=%-3d  h=%-3d  fmt=%x  px=(%02x,%02x,%02x,%02x)  img=%s",
 141                 width, height, format, pixels[0], pixels[1], pixels[2], pixels[3],
 142                 base);
 143         g_free(base);
 144
 145         gis_opengl_end(self->opengl);
 146
 147         g_object_unref(pixbuf);
 148
 149         /* Redraw */
 150         gis_opengl_redraw(self->opengl);
 151 }
 152
 153
 154 /*****************
 155  * ASync helpers *
 156  *****************/
 157 typedef struct {
 158         GisPluginRidge *self;
 159         layer_t *layer;
 160 } cached_t;
 161 void cached_cb(gchar *filename, gboolean updated, gpointer _udata)
 162 {
 163         cached_t *udata = _udata;
 164         load_texture(udata->self, udata->layer, filename);
 165         g_free(udata);
 166 }
 167
 168 /*************
 169  * callbacks *
 170  *************/
 171 static void on_site_changed(GisView *view, gchar *site, GisPluginRidge *self)
 172 {
 173         g_debug("GisPluginRidge: on_site_changed - site=%s", site);
 174         if (site == NULL || site[0] == '\0')
 175                 return;
 176         for (int i = 0; i < LAYER_COUNT; i++) {
 177                 gchar *base = "http://radar.weather.gov/ridge/";
 178                 gchar *path  = g_strdup_printf(layers[i].fmt, site+1);
 179                 cached_t *udata = g_malloc(sizeof(cached_t));
 180                 udata->self  = self;
 181                 udata->layer = &layers[i];
 182                 cache_file(base, path, AWEATHER_ONCE, NULL, cached_cb, udata);
 183                 //cache_file(base, path, AWEATHER_UPDATE, cached_cb, udata);
 184                 g_free(path);
 185         }
 186 }
 187
 188 void toggle_layer(GtkToggleButton *check, GisPluginRidge *self)
 189 {
 190         layer_t *layer = g_object_get_data(G_OBJECT(check), "layer");
 191         layer->enabled = gtk_toggle_button_get_active(check);
 192         gis_opengl_redraw(self->opengl);
 193 }
 194
 195 /***********
 196  * Methods *
 197  ***********/
 198 GisPluginRidge *gis_plugin_ridge_new(GisWorld *world, GisView *view, GisOpenGL *opengl)
 199 {
 200         GisPluginRidge *self = g_object_new(GIS_TYPE_PLUGIN_RIDGE, NULL);
 201         self->world  = world;
 202         self->view   = view;
 203         self->opengl = opengl;
 204
 205         g_signal_connect(view, "site-changed", G_CALLBACK(on_site_changed), self);
 206         on_site_changed(view, gis_view_get_site(view), self);
 207
 208         return self;
 209 }
 210
 211 static GtkWidget *gis_plugin_ridge_get_config(GisPlugin *_self)
 212 {
 213         GisPluginRidge *self = GIS_PLUGIN_RIDGE(_self);
 214         GtkWidget *body = gtk_alignment_new(0.5, 0, 0, 0);
 215         GtkWidget *hbox = gtk_hbox_new(FALSE, 10);
 216         for (int i = 0; i < LAYER_COUNT; i++) {
 217                 GtkWidget *check = gtk_check_button_new_with_label(layers[i].name);
 218                 gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(check), layers[i].enabled);
 219                 gtk_box_pack_start(GTK_BOX(hbox), check, FALSE, TRUE, 0);
 220                 g_object_set_data(G_OBJECT(check), "layer", &layers[i]);
 221                 g_signal_connect(check, "toggled", G_CALLBACK(toggle_layer), self);
 222         }
 223         gtk_container_add(GTK_CONTAINER(body), hbox);
 224         return body;
 225 }
 226
 227 static void gis_plugin_ridge_expose(GisPlugin *_self)
 228 {
 229         GisPluginRidge *self = GIS_PLUGIN_RIDGE(_self);
 230
 231         g_debug("GisPluginRidge: 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 }