+/*
+ * Copyright (C) 2009 Andy Spencer <spenceal@rose-hulman.edu>
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <time.h>
+#include <glib/gstdio.h>
+#include <GL/gl.h>
+
+#include <gis.h>
+
+#include "map.h"
+
+#define MAX_RESOLUTION 500
+#define TILE_WIDTH 1024
+#define TILE_HEIGHT 512
+
+struct _LoadTileData {
+ GisPluginMap *self;
+ GisTile *tile;
+ GdkPixbuf *pixbuf;
+};
+static gboolean _load_tile_cb(gpointer _data)
+{
+ struct _LoadTileData *data = _data;
+ GisPluginMap *self = data->self;
+ GisTile *tile = data->tile;
+ GdkPixbuf *pixbuf = data->pixbuf;
+ g_free(data);
+
+ /* Create Texture */
+ g_debug("GisPluginMap: _load_tile_cb start");
+ 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);
+
+ guint *tex = g_new0(guint, 1);
+ gis_viewer_begin(self->viewer);
+ 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_NEAREST);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
+ glFlush();
+ gis_viewer_end(self->viewer);
+
+ tile->data = tex;
+ gtk_widget_queue_draw(GTK_WIDGET(self->viewer));
+ g_object_unref(pixbuf);
+ return FALSE;
+}
+
+static void _load_tile(GisTile *tile, gpointer _self)
+{
+ GisPluginMap *self = _self;
+ g_debug("GisPluginMap: _load_tile start %p", g_thread_self());
+ char *path = gis_wms_make_local(self->wms, tile);
+ struct _LoadTileData *data = g_new0(struct _LoadTileData, 1);
+ data->self = self;
+ data->tile = tile;
+ data->pixbuf = gdk_pixbuf_new_from_file(path, NULL);
+ if (data->pixbuf) {
+ g_idle_add_full(G_PRIORITY_LOW, _load_tile_cb, data, NULL);
+ } else {
+ g_warning("GisPluginMap: _load_tile - Error loading pixbuf %s", path);
+ g_remove(path);
+ }
+ g_free(path);
+ g_debug("GisPluginMap: _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(GisTile *tile, gpointer _self)
+{
+ GisPluginMap *self = _self;
+ g_debug("GisPluginMap: _free_tile: %p=%d", tile->data, *(guint*)tile->data);
+ g_idle_add_full(G_PRIORITY_LOW, _free_tile_cb, tile->data, NULL);
+}
+
+static gpointer _update_tiles(gpointer _self)
+{
+ g_debug("GisPluginMap: _update_tiles");
+ GisPluginMap *self = _self;
+ g_mutex_lock(self->mutex);
+ gdouble lat, lon, elev;
+ gis_viewer_get_location(self->viewer, &lat, &lon, &elev);
+ gis_tile_update(self->tiles,
+ MAX_RESOLUTION, TILE_WIDTH, TILE_WIDTH,
+ lat, lon, elev,
+ _load_tile, self);
+ gis_tile_gc(self->tiles, time(NULL)-10,
+ _free_tile, self);
+ g_mutex_unlock(self->mutex);
+ return NULL;
+}
+
+/*************
+ * Callbacks *
+ *************/
+static void _on_location_changed(GisViewer *viewer,
+ gdouble lat, gdouble lon, gdouble elev, GisPluginMap *self)
+{
+ g_thread_create(_update_tiles, self, FALSE, NULL);
+}
+
+static gpointer _expose(GisCallback *callback, gpointer _self)
+{
+ GisPluginMap *self = GIS_PLUGIN_MAP(_self);
+ g_debug("GisPluginMap: expose viewer=%p tiles=%p,%p",
+ self->viewer, self->tiles, self->tiles->data);
+ gis_viewer_render_tiles(self->viewer, self->tiles);
+ return NULL;
+}
+
+/***********
+ * Methods *
+ ***********/
+GisPluginMap *gis_plugin_map_new(GisViewer *viewer)
+{
+ g_debug("GisPluginMap: new");
+ GisPluginMap *self = g_object_new(GIS_TYPE_PLUGIN_MAP, NULL);
+ self->viewer = g_object_ref(viewer);
+
+ /* Load initial tiles */
+ _load_tile(self->tiles, self);
+ g_thread_create(_update_tiles, self, FALSE, NULL);
+
+ /* Connect signals */
+ self->sigid = g_signal_connect(self->viewer, "location-changed",
+ G_CALLBACK(_on_location_changed), self);
+
+ /* Add renderers */
+ GisCallback *callback = gis_callback_new(_expose, self);
+ gis_viewer_add(viewer, GIS_OBJECT(callback), GIS_LEVEL_WORLD, 0);
+
+ return self;
+}
+
+
+/****************
+ * GObject code *
+ ****************/
+/* Plugin init */
+static void gis_plugin_map_plugin_init(GisPluginInterface *iface);
+G_DEFINE_TYPE_WITH_CODE(GisPluginMap, gis_plugin_map, G_TYPE_OBJECT,
+ G_IMPLEMENT_INTERFACE(GIS_TYPE_PLUGIN,
+ gis_plugin_map_plugin_init));
+static void gis_plugin_map_plugin_init(GisPluginInterface *iface)
+{
+ g_debug("GisPluginMap: plugin_init");
+ /* Add methods to the interface */
+}
+/* Class/Object init */
+static void gis_plugin_map_init(GisPluginMap *self)
+{
+ g_debug("GisPluginMap: init");
+ /* Set defaults */
+ self->mutex = g_mutex_new();
+ self->tiles = gis_tile_new(NULL, NORTH, SOUTH, EAST, WEST);
+ self->wms = gis_wms_new(
+ "http://labs.metacarta.com/wms/vmap0", "basic", "image/png",
+ "osm/", "png", TILE_WIDTH, TILE_HEIGHT);
+}
+static void gis_plugin_map_dispose(GObject *gobject)
+{
+ g_debug("GisPluginMap: dispose");
+ GisPluginMap *self = GIS_PLUGIN_MAP(gobject);
+ /* Drop references */
+ if (self->viewer) {
+ g_signal_handler_disconnect(self->viewer, self->sigid);
+ g_object_unref(self->viewer);
+ self->viewer = NULL;
+ }
+ G_OBJECT_CLASS(gis_plugin_map_parent_class)->dispose(gobject);
+}
+static void gis_plugin_map_finalize(GObject *gobject)
+{
+ g_debug("GisPluginMap: finalize");
+ GisPluginMap *self = GIS_PLUGIN_MAP(gobject);
+ /* Free data */
+ gis_tile_free(self->tiles, _free_tile, self);
+ gis_wms_free(self->wms);
+ g_mutex_free(self->mutex);
+ G_OBJECT_CLASS(gis_plugin_map_parent_class)->finalize(gobject);
+
+}
+static void gis_plugin_map_class_init(GisPluginMapClass *klass)
+{
+ g_debug("GisPluginMap: class_init");
+ GObjectClass *gobject_class = (GObjectClass*)klass;
+ gobject_class->dispose = gis_plugin_map_dispose;
+ gobject_class->finalize = gis_plugin_map_finalize;
+}