Pileus Git - grits/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  * Overlay constants *
  54  *********************/
  55 enum {
  56         LAYER_TOPO,
  57         LAYER_COUNTY,
  58         LAYER_RIVERS,
  59         LAYER_HIGHWAYS,
  60         LAYER_CITY,
  61         LAYER_COUNT
  62 };
  63
  64 typedef struct {
  65         gchar *name;
  66         gchar *fmt;
  67         gboolean enabled;
  68         float z;
  69         guint tex;
  70 } layer_t;
  71
  72 static layer_t layers[] = {
  73         [LAYER_TOPO]     = {"Topo",     "Overlays/Topo/Short/%s_Topo_Short.jpg",         TRUE,  1, 0},
  74         [LAYER_COUNTY]   = {"Counties", "Overlays/County/Short/%s_County_Short.gif",     TRUE,  3, 0},
  75         [LAYER_RIVERS]   = {"Rivers",   "Overlays/Rivers/Short/%s_Rivers_Short.gif",     FALSE, 4, 0},
  76         [LAYER_HIGHWAYS] = {"Highways", "Overlays/Highways/Short/%s_Highways_Short.gif", FALSE, 5, 0},
  77         [LAYER_CITY]     = {"Cities",   "Overlays/Cities/Short/%s_City_Short.gif",       TRUE,  6, 0},
  78 };
  79
  80
  81 /***********
  82  * Helpers *
  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(AWeatherRidge *self, layer_t *layer, gchar *filename)
  90 {
  91         aweather_gui_gl_begin(self->gui);
  92
  93         /* Load image */
  94         GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file(filename, NULL);
  95         if (!pixbuf)
  96                 g_warning("Failed to load texture: %s", filename);
  97         guchar    *pixels = gdk_pixbuf_get_pixels(pixbuf);
  98         int        width  = gdk_pixbuf_get_width(pixbuf);
  99         int        height = gdk_pixbuf_get_height(pixbuf);
 100         int        format = gdk_pixbuf_get_has_alpha(pixbuf) ? GL_RGBA : GL_RGB;
 101
 102         /* Create Texture */
 103         glDeleteTextures(1, &layer->tex);
 104         glGenTextures(1, &layer->tex);
 105         glBindTexture(GL_TEXTURE_2D, layer->tex); // 2d texture (x and y size)
 106
 107         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 108         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
 109                         format, GL_UNSIGNED_BYTE, pixels);
 110         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 111         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 112
 113         char *base = g_path_get_basename(filename);
 114         g_message("loaded image:  w=%-3d  h=%-3d  fmt=%x  px=(%02x,%02x,%02x,%02x)  img=%s",
 115                 width, height, format, pixels[0], pixels[1], pixels[2], pixels[3],
 116                 base);
 117         g_free(base);
 118
 119         aweather_gui_gl_end(self->gui);
 120
 121         g_object_unref(pixbuf);
 122
 123         /* Redraw */
 124         aweather_gui_gl_redraw(self->gui);
 125 }
 126
 127
 128 /*****************
 129  * ASync helpers *
 130  *****************/
 131 typedef struct {
 132         AWeatherRidge *self;
 133         layer_t *layer;
 134 } cached_t;
 135 void cached_cb(gchar *filename, gboolean updated, gpointer _udata)
 136 {
 137         cached_t *udata = _udata;
 138         load_texture(udata->self, udata->layer, filename);
 139         g_free(udata);
 140 }
 141
 142 /*************
 143  * callbacks *
 144  *************/
 145 static void on_site_changed(AWeatherView *view, gchar *site, AWeatherRidge *self)
 146 {
 147         g_message("site changed to %s", site);
 148         for (int i = 0; i < LAYER_COUNT; i++) {
 149                 gchar *base = "http://radar.weather.gov/ridge/";
 150                 gchar *path  = g_strdup_printf(layers[i].fmt, site);
 151                 cached_t *udata = g_malloc(sizeof(cached_t));
 152                 udata->self  = self;
 153                 udata->layer = &layers[i];
 154                 cache_file(base, path, AWEATHER_NEVER, cached_cb, udata);
 155                 g_free(path);
 156         }
 157 }
 158
 159 void toggle_layer(GtkToggleButton *check, AWeatherGui *gui)
 160 {
 161         layer_t *layer = g_object_get_data(G_OBJECT(check), "layer");
 162         layer->enabled = gtk_toggle_button_get_active(check);
 163         aweather_gui_gl_redraw(gui);
 164 }
 165
 166 /***********
 167  * Methods *
 168  ***********/
 169 AWeatherRidge *aweather_ridge_new(AWeatherGui *gui)
 170 {
 171         AWeatherRidge *ridge = g_object_new(AWEATHER_TYPE_RIDGE, NULL);
 172         ridge->gui = gui;
 173
 174         AWeatherView *view    = aweather_gui_get_view(gui);
 175         GtkWidget    *drawing = aweather_gui_get_widget(gui, "drawing");
 176         GtkWidget    *config  = aweather_gui_get_widget(gui, "tabs");
 177
 178         /* Add configuration tab */
 179         GtkWidget *tab  = gtk_label_new("Ridge");
 180         GtkWidget *body = gtk_alignment_new(0.5, 0, 0, 0);
 181         GtkWidget *hbox = gtk_hbox_new(FALSE, 10);
 182         for (int i = 0; i < LAYER_COUNT; i++) {
 183                 GtkWidget *check = gtk_check_button_new_with_label(layers[i].name);
 184                 gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(check), layers[i].enabled);
 185                 gtk_box_pack_start(GTK_BOX(hbox), check, FALSE, TRUE, 0);
 186                 g_object_set_data(G_OBJECT(check), "layer", &layers[i]);
 187                 g_signal_connect(check, "toggled", G_CALLBACK(toggle_layer), gui);
 188         }
 189         gtk_container_add(GTK_CONTAINER(body), hbox);
 190         gtk_notebook_append_page(GTK_NOTEBOOK(config), body, tab);
 191
 192         g_signal_connect(view, "site-changed", G_CALLBACK(on_site_changed),  ridge);
 193
 194         return ridge;
 195 }
 196
 197 static void aweather_ridge_expose(AWeatherPlugin *_ridge)
 198 {
 199         AWeatherRidge *ridge = AWEATHER_RIDGE(_ridge);
 200
 201         g_message("ridge:expose");
 202         glPushMatrix();
 203         glEnable(GL_TEXTURE_2D);
 204         glColor4f(1,1,1,1);
 205
 206         for (int i = 0; i < LAYER_COUNT; i++) {
 207                 if (!layers[i].enabled)
 208                         continue;
 209                 glBindTexture(GL_TEXTURE_2D, layers[i].tex);
 210                 glBegin(GL_POLYGON);
 211                 glTexCoord2f(0.0, 0.0); glVertex3f(240*1000*-1.0, 282*1000* 1.0, layers[i].z);
 212                 glTexCoord2f(0.0, 1.0); glVertex3f(240*1000*-1.0, 282*1000*-1.0, layers[i].z);
 213                 glTexCoord2f(1.0, 1.0); glVertex3f(240*1000* 1.0, 282*1000*-1.0, layers[i].z);
 214                 glTexCoord2f(1.0, 0.0); glVertex3f(240*1000* 1.0, 282*1000* 1.0, layers[i].z);
 215                 glEnd();
 216         }
 217
 218         glPopMatrix();
 219 }