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 "data.h"
  27
  28 enum {
  29         LAYER_TOPO,
  30         LAYER_COUNTY,
  31         LAYER_RIVERS,
  32         LAYER_HIGHWAYS,
  33         LAYER_CITY,
  34         LAYER_COUNT
  35 };
  36
  37 typedef struct {
  38         gchar *name;
  39         gchar *fmt;
  40         gboolean enabled;
  41         float z;
  42         guint tex;
  43 } layer_t;
  44
  45 static layer_t layers[] = {
  46         [LAYER_TOPO]     = {"Topo",     "Overlays/Topo/Short/%s_Topo_Short.jpg",         TRUE,  1, 0},
  47         [LAYER_COUNTY]   = {"Counties", "Overlays/County/Short/%s_County_Short.gif",     TRUE,  3, 0},
  48         [LAYER_RIVERS]   = {"Rivers",   "Overlays/Rivers/Short/%s_Rivers_Short.gif",     FALSE, 4, 0},
  49         [LAYER_HIGHWAYS] = {"Highways", "Overlays/Highways/Short/%s_Highways_Short.gif", FALSE, 5, 0},
  50         [LAYER_CITY]     = {"Cities",   "Overlays/Cities/Short/%s_City_Short.gif",       TRUE,  6, 0},
  51 };
  52
  53 static AWeatherGui *gui = NULL;
  54
  55 /**
  56  * Load an image into an OpenGL texture
  57  * \param  filename  Path to the image file
  58  * \return The OpenGL identifier for the texture
  59  */
  60 void load_texture(gchar *filename, gboolean updated, gpointer _layer)
  61 {
  62         layer_t *layer = _layer;
  63         aweather_gui_gl_begin(gui);
  64
  65         /* Load image */
  66         GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file(filename, NULL);
  67         if (!pixbuf)
  68                 g_warning("Failed to load texture: %s", filename);
  69         guchar    *pixels = gdk_pixbuf_get_pixels(pixbuf);
  70         int        width  = gdk_pixbuf_get_width(pixbuf);
  71         int        height = gdk_pixbuf_get_height(pixbuf);
  72         int        format = gdk_pixbuf_get_has_alpha(pixbuf) ? GL_RGBA : GL_RGB;
  73
  74         /* Create Texture */
  75         glDeleteTextures(1, &layer->tex);
  76         glGenTextures(1, &layer->tex);
  77         glBindTexture(GL_TEXTURE_2D, layer->tex); // 2d texture (x and y size)
  78
  79         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
  80         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
  81                         format, GL_UNSIGNED_BYTE, pixels);
  82         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
  83         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
  84
  85         char *base = g_path_get_basename(filename);
  86         g_message("loaded image:  w=%-3d  h=%-3d  fmt=%x  px=(%02x,%02x,%02x,%02x)  img=%s",
  87                 width, height, format, pixels[0], pixels[1], pixels[2], pixels[3],
  88                 base);
  89         g_free(base);
  90
  91         aweather_gui_gl_end(gui);
  92
  93         g_object_unref(pixbuf);
  94
  95         /* Redraw */
  96         gtk_widget_queue_draw(aweather_gui_get_widget(gui, "drawing"));
  97 }
  98
  99 static void set_site(AWeatherView *view, gchar *site, gpointer user_data)
 100 {
 101         g_message("location changed to %s", site);
 102         for (int i = 0; i < LAYER_COUNT; i++) {
 103                 gchar *base = "http://radar.weather.gov/ridge/";
 104                 gchar *path  = g_strdup_printf(layers[i].fmt, site);
 105                 cache_file(base, path, AWEATHER_NEVER, load_texture, &layers[i]);
 106                 g_free(path);
 107         }
 108 }
 109
 110 static gboolean expose(GtkWidget *da, GdkEventExpose *event, gpointer user_data)
 111 {
 112         g_message("ridge:expose");
 113         glPushMatrix();
 114         glEnable(GL_TEXTURE_2D);
 115         glColor4f(1,1,1,1);
 116
 117         for (int i = 0; i < LAYER_COUNT; i++) {
 118                 if (!layers[i].enabled)
 119                         continue;
 120                 glBindTexture(GL_TEXTURE_2D, layers[i].tex);
 121                 glBegin(GL_POLYGON);
 122                 glTexCoord2f(0.0, 0.0); glVertex3f(240*1000*-1.0, 282*1000* 1.0, layers[i].z);
 123                 glTexCoord2f(0.0, 1.0); glVertex3f(240*1000*-1.0, 282*1000*-1.0, layers[i].z);
 124                 glTexCoord2f(1.0, 1.0); glVertex3f(240*1000* 1.0, 282*1000*-1.0, layers[i].z);
 125                 glTexCoord2f(1.0, 0.0); glVertex3f(240*1000* 1.0, 282*1000* 1.0, layers[i].z);
 126                 glEnd();
 127         }
 128
 129         glPopMatrix();
 130         return FALSE;
 131 }
 132
 133 void toggle_layer(GtkToggleButton *check, gpointer _layer)
 134 {
 135         layer_t *layer = _layer;
 136         layer->enabled = gtk_toggle_button_get_active(check);
 137         gtk_widget_queue_draw(aweather_gui_get_widget(gui, "drawing"));
 138 }
 139
 140 gboolean ridge_init(AWeatherGui *_gui)
 141 {
 142         gui = _gui;
 143         AWeatherView *view    = aweather_gui_get_view(gui);
 144         GtkWidget    *drawing = aweather_gui_get_widget(gui, "drawing");
 145         GtkWidget    *config  = aweather_gui_get_widget(gui, "tabs");
 146
 147         /* Add configuration tab */
 148         GtkWidget *tab  = gtk_label_new("Ridge");
 149         GtkWidget *body = gtk_alignment_new(0.5, 0, 0, 0);
 150         GtkWidget *hbox = gtk_hbox_new(FALSE, 10);
 151         for (int i = 0; i < LAYER_COUNT; i++) {
 152                 GtkWidget *check = gtk_check_button_new_with_label(layers[i].name);
 153                 gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(check), layers[i].enabled);
 154                 gtk_box_pack_start(GTK_BOX(hbox), check, FALSE, TRUE, 0);
 155                 g_signal_connect(check, "toggled", G_CALLBACK(toggle_layer), &layers[i]);
 156         }
 157         gtk_container_add(GTK_CONTAINER(body), hbox);
 158         gtk_notebook_append_page(GTK_NOTEBOOK(config), body, tab);
 159
 160         /* Set up OpenGL Stuff */
 161         g_signal_connect(drawing, "expose-event",     G_CALLBACK(expose),    NULL);
 162         g_signal_connect(view,    "location-changed", G_CALLBACK(set_site),  NULL);
 163
 164         return TRUE;
 165 }