#include <config.h>
#include <gtk/gtk.h>
-#include <gtk/gtkgl.h>
-#include <gdk/gdkkeysyms.h>
+#include <curl/curl.h>
#include <GL/gl.h>
-#include <math.h>
-static guint topo_tex;
+#include <stdio.h>
+enum {
+ LAYER_TOPO,
+ LAYER_COUNTY,
+ LAYER_RIVERS,
+ LAYER_HIGHWAYS,
+ LAYER_CITY,
+ LAYER_COUNT
+};
+
+static struct {
+ char *fmt;
+ float z;
+ guint tex;
+} layers[] = {
+ [LAYER_TOPO] = { "Overlays/" "Topo/" "Short/" "%s_Topo_Short.jpg", 1, 0 },
+ [LAYER_COUNTY] = { "Overlays/" "County/" "Short/" "%s_County_Short.gif", 3, 0 },
+ [LAYER_RIVERS] = { "Overlays/" "Rivers/" "Short/" "%s_Rivers_Short.gif", 4, 0 },
+ [LAYER_HIGHWAYS] = { "Overlays/" "Highways/" "Short/" "%s_Highways_Short.gif", 5, 0 },
+ [LAYER_CITY] = { "Overlays/" "Cities/" "Short/" "%s_City_Short.gif", 6, 0 },
+};
+
+static CURL *curl_handle;
+
+
+/**
+ * Cache a image from Ridge to the local disk
+ * \param path Path to the Ridge file, starting after /ridge/
+ * \return The local path to the cached image
+ */
+char *cache_image(char *path)
+{
+ gchar base[] = "http://radar.weather.gov/ridge/";
+ gchar *url = g_strconcat(base, path, NULL);
+ gchar *local = g_build_filename(g_get_user_cache_dir(), PACKAGE, path, NULL);
+ if (!g_file_test(local, G_FILE_TEST_EXISTS)) {
+ if (!g_file_test(g_path_get_dirname(local), G_FILE_TEST_IS_DIR)) {
+ //g_printerr("Making directory %s\n", g_path_get_dirname(local));
+ g_mkdir_with_parents(g_path_get_dirname(local), 0755);
+ }
+ //g_printerr("Fetching image %s -> %s\n", url, local);
+ long http_code;
+ FILE *cached_image = fopen(local, "w+");
+ curl_easy_setopt(curl_handle, CURLOPT_URL, url);
+ curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, cached_image);
+ curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, NULL);
+ curl_easy_perform(curl_handle);
+ curl_easy_getinfo(curl_handle, CURLINFO_RESPONSE_CODE, &http_code);
+ fflush(cached_image);
+ if (http_code != 200) {
+ g_message("http %ld while fetching %s", http_code, url);
+ remove(local);
+ return NULL;
+ }
+ }
+ return local;
+}
+
+/**
+ * Load an image into an OpenGL texture
+ * \param filename Path to the image file
+ * \return The OpenGL identifier for the texture
+ */
guint load_texture(char *filename)
{
/* Load image */
guchar *pixels = gdk_pixbuf_get_pixels(pixbuf);
int width = gdk_pixbuf_get_width(pixbuf);
int height = gdk_pixbuf_get_height(pixbuf);
+ int format = gdk_pixbuf_get_has_alpha(pixbuf) ? GL_RGBA : GL_RGB;
/* Create Texture */
guint id;
glBindTexture(GL_TEXTURE_2D, id); // 2d texture (x and y size)
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- glTexImage2D(GL_TEXTURE_2D, 0, 3, width, height, 0,
- GL_RGB, GL_UNSIGNED_BYTE, pixels);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
+ format, GL_UNSIGNED_BYTE, pixels);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- g_message("loaded %s: w=%d h=%d", filename, width, height);
+ g_message("loaded image: w=%-3d h=%-3d fmt=%x px=(%02x,%02x,%02x,%02x) img=%s",
+ width, height, format, pixels[0], pixels[1], pixels[2], pixels[3],
+ g_path_get_basename(filename));
return id;
}
static gboolean expose(GtkWidget *da, GdkEventExpose *event, gpointer user_data)
{
- //g_message("ridge:expose");
+ g_message("ridge:expose");
glPushMatrix();
- glScaled(500*1000, 500*1000, 0);
-
- glBindTexture(GL_TEXTURE_2D, topo_tex);
glEnable(GL_TEXTURE_2D);
+ glColor4f(1,1,1,1);
+
+ for (int i = 0; i < LAYER_COUNT; i++) {
+ glBindTexture(GL_TEXTURE_2D, layers[i].tex);
- glBegin(GL_POLYGON);
- glTexCoord2f(0.0, 0.0); glVertex3f(-1.0, 1.0, 0.1);
- glTexCoord2f(0.0, 1.0); glVertex3f(-1.0, -1.0, 0.1);
- glTexCoord2f(1.0, 1.0); glVertex3f( 1.0, -1.0, 0.1);
- glTexCoord2f(1.0, 0.0); glVertex3f( 1.0, 1.0, 0.1);
- glEnd();
+ glBegin(GL_POLYGON);
+ glTexCoord2f(0.0, 0.0); glVertex3f(500*1000*-1.0, 500*1000* 1.0, layers[i].z);
+ glTexCoord2f(0.0, 1.0); glVertex3f(500*1000*-1.0, 500*1000*-1.0, layers[i].z);
+ glTexCoord2f(1.0, 1.0); glVertex3f(500*1000* 1.0, 500*1000*-1.0, layers[i].z);
+ glTexCoord2f(1.0, 0.0); glVertex3f(500*1000* 1.0, 500*1000* 1.0, layers[i].z);
+ glEnd();
+ }
glPopMatrix();
return FALSE;
static gboolean configure(GtkWidget *da, GdkEventConfigure *event, gpointer user_data)
{
- topo_tex = load_texture("../data/topo.jpg");
+ for (int i = 0; i < LAYER_COUNT; i++) {
+ if (layers[i].tex != 0)
+ continue;
+ char *path = g_strdup_printf(layers[i].fmt, "IND");
+ char *local = cache_image(path);
+ layers[i].tex = load_texture(local);
+ g_free(local);
+ g_free(path);
+ }
return FALSE;
}
/* Set up OpenGL Stuff */
g_signal_connect(drawing, "expose-event", G_CALLBACK(expose), NULL);
g_signal_connect(drawing, "configure-event", G_CALLBACK(configure), NULL);
+
+ curl_global_init(CURL_GLOBAL_ALL);
+ curl_handle = curl_easy_init();
+
return TRUE;
}
projects / grits / blobdiff