/* * Copyright (C) 2009-2010 Andy Spencer * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ /** * SECTION:sat * @short_description: Satellite plugin * * #GritsPluginSat provides overlays using satellite imagery. This is mostly * provided by NASA's Blue Marble Next Generation. */ #include #include #include #include #include #include "sat.h" #define MAX_RESOLUTION 500 #define TILE_WIDTH 1024 #define TILE_HEIGHT 512 struct _LoadTileData { GritsPluginSat *sat; GritsTile *tile; gchar *path; }; static gboolean _load_tile_cb(gpointer _data) { struct _LoadTileData *data = _data; GritsPluginSat *sat = data->sat; GritsTile *tile = data->tile; gchar *path = data->path; g_free(data); /* Load pixbuf */ g_debug("GritsPluginSat: _load_tile_cb start"); GdkPixbuf *pixbuf = gdk_pixbuf_new_from_file(path, NULL); if (!pixbuf) { g_warning("GritsPluginSat: _load_tile - Error loading pixbuf %s", path); g_remove(path); g_free(path); return FALSE; } g_free(path); /* Create Texture */ guchar *pixels = gdk_pixbuf_get_pixels(pixbuf); gboolean alpha = gdk_pixbuf_get_has_alpha(pixbuf); gint width = gdk_pixbuf_get_width(pixbuf); gint height = gdk_pixbuf_get_height(pixbuf); /* Draw a border */ //gint border = 10; //gint stride = gdk_pixbuf_get_rowstride(pixbuf); //for (int i = 0; i < border; i++) { // memset(&pixels[( i)*stride], 0xff, stride); // memset(&pixels[(height-i)*stride], 0xff, stride); //} //for (int i = 0; i < height; i++) { // memset(&pixels[(i*stride)], 0xff, border*4); // memset(&pixels[(i*stride)+((width-border)*4)], 0xff, border*4); //} guint *tex = g_new0(guint, 1); glGenTextures(1, tex); glBindTexture(GL_TEXTURE_2D, *tex); glPixelStorei(GL_UNPACK_ALIGNMENT, 1); glPixelStorei(GL_PACK_ALIGNMENT, 1); glTexImage2D(GL_TEXTURE_2D, 0, 4, width, height, 0, (alpha ? GL_RGBA : GL_RGB), GL_UNSIGNED_BYTE, pixels); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP); glFlush(); tile->data = tex; gtk_widget_queue_draw(GTK_WIDGET(sat->viewer)); g_object_unref(pixbuf); return FALSE; } static void _load_tile(GritsTile *tile, gpointer _sat) { GritsPluginSat *sat = _sat; g_debug("GritsPluginSat: _load_tile start %p", g_thread_self()); struct _LoadTileData *data = g_new0(struct _LoadTileData, 1); data->sat = sat; data->tile = tile; data->path = grits_wms_fetch(sat->wms, tile, GRITS_ONCE, NULL, NULL); g_idle_add_full(G_PRIORITY_LOW, _load_tile_cb, data, NULL); g_debug("GritsPluginSat: _load_tile end %p", g_thread_self()); } static gboolean _free_tile_cb(gpointer data) { glDeleteTextures(1, data); g_free(data); return FALSE; } static void _free_tile(GritsTile *tile, gpointer _sat) { g_debug("GritsPluginSat: _free_tile: %p", tile->data); if (tile->data) g_idle_add_full(G_PRIORITY_LOW, _free_tile_cb, tile->data, NULL); } static gpointer _update_tiles(gpointer _sat) { g_debug("GritsPluginSat: _update_tiles"); GritsPluginSat *sat = _sat; if (!g_mutex_trylock(sat->mutex)) return NULL; GritsPoint eye; grits_viewer_get_location(sat->viewer, &eye.lat, &eye.lon, &eye.elev); grits_tile_update(sat->tiles, &eye, MAX_RESOLUTION, TILE_WIDTH, TILE_WIDTH, _load_tile, sat); grits_tile_gc(sat->tiles, time(NULL)-10, _free_tile, sat); g_mutex_unlock(sat->mutex); return NULL; } /************* * Callbacks * *************/ static void _on_location_changed(GritsViewer *viewer, gdouble lat, gdouble lon, gdouble elev, GritsPluginSat *sat) { g_thread_create(_update_tiles, sat, FALSE, NULL); } static gpointer _threaded_init(GritsPluginSat *sat) { _load_tile(sat->tiles, sat); _update_tiles(sat); return NULL; } /*********** * Methods * ***********/ /** * grits_plugin_sat_new: * @viewer: the #GritsViewer to use for drawing * * Create a new instance of the satellite plugin. * * Returns: the new #GritsPluginSat */ GritsPluginSat *grits_plugin_sat_new(GritsViewer *viewer) { g_debug("GritsPluginSat: new"); GritsPluginSat *sat = g_object_new(GRITS_TYPE_PLUGIN_SAT, NULL); sat->viewer = g_object_ref(viewer); /* Load initial tiles */ g_thread_create((GThreadFunc)_threaded_init, sat, FALSE, NULL); /* Connect signals */ sat->sigid = g_signal_connect(sat->viewer, "location-changed", G_CALLBACK(_on_location_changed), sat); /* Add renderers */ grits_viewer_add(viewer, GRITS_OBJECT(sat->tiles), GRITS_LEVEL_WORLD, FALSE); return sat; } /**************** * GObject code * ****************/ /* Plugin init */ static void grits_plugin_sat_plugin_init(GritsPluginInterface *iface); G_DEFINE_TYPE_WITH_CODE(GritsPluginSat, grits_plugin_sat, G_TYPE_OBJECT, G_IMPLEMENT_INTERFACE(GRITS_TYPE_PLUGIN, grits_plugin_sat_plugin_init)); static void grits_plugin_sat_plugin_init(GritsPluginInterface *iface) { g_debug("GritsPluginSat: plugin_init"); /* Add methods to the interface */ } /* Class/Object init */ static void grits_plugin_sat_init(GritsPluginSat *sat) { g_debug("GritsPluginSat: init"); /* Set defaults */ sat->mutex = g_mutex_new(); sat->tiles = grits_tile_new(NULL, NORTH, SOUTH, EAST, WEST); sat->wms = grits_wms_new( "http://www.nasa.network.com/wms", "bmng200406", "image/jpeg", "bmng/", "jpg", TILE_WIDTH, TILE_HEIGHT); } static void grits_plugin_sat_dispose(GObject *gobject) { g_debug("GritsPluginSat: dispose"); GritsPluginSat *sat = GRITS_PLUGIN_SAT(gobject); /* Drop references */ if (sat->viewer) { g_signal_handler_disconnect(sat->viewer, sat->sigid); g_object_unref(sat->viewer); sat->viewer = NULL; } G_OBJECT_CLASS(grits_plugin_sat_parent_class)->dispose(gobject); } static void grits_plugin_sat_finalize(GObject *gobject) { g_debug("GritsPluginSat: finalize"); GritsPluginSat *sat = GRITS_PLUGIN_SAT(gobject); /* Free data */ grits_tile_free(sat->tiles, _free_tile, sat); grits_wms_free(sat->wms); g_mutex_free(sat->mutex); G_OBJECT_CLASS(grits_plugin_sat_parent_class)->finalize(gobject); } static void grits_plugin_sat_class_init(GritsPluginSatClass *klass) { g_debug("GritsPluginSat: class_init"); GObjectClass *gobject_class = (GObjectClass*)klass; gobject_class->dispose = grits_plugin_sat_dispose; gobject_class->finalize = grits_plugin_sat_finalize; }