Pileus Git - grits/blob - src/plugins/map.c

   1 /*
   2  * Copyright (C) 2009-2010 Andy Spencer <andy753421@gmail.com>
   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 <time.h>
  19 #include <glib/gstdio.h>
  20 #include <GL/gl.h>
  21
  22 #include <gis.h>
  23
  24 #include "map.h"
  25
  26 #define MAX_RESOLUTION 500
  27 #define TILE_WIDTH     1024
  28 #define TILE_HEIGHT    512
  29
  30 const guchar colormap[][2][4] = {
  31         {{0x73, 0x91, 0xad}, {0x73, 0x91, 0xad, 0x20}}, // Oceans
  32         {{0xf6, 0xee, 0xee}, {0xf6, 0xee, 0xee, 0x00}}, // Ground
  33         {{0xff, 0xff, 0xff}, {0xff, 0xff, 0xff, 0xff}}, // Borders
  34         {{0x73, 0x93, 0xad}, {0x73, 0x93, 0xad, 0x40}}, // Lakes
  35         {{0xff, 0xe1, 0x80}, {0xff, 0xe1, 0x80, 0x60}}, // Cities
  36 };
  37
  38 struct _LoadTileData {
  39         GisPluginMap *self;
  40         GisTile      *tile;
  41         GdkPixbuf    *pixbuf;
  42 };
  43 #include <stdlib.h>
  44 static gboolean _load_tile_cb(gpointer _data)
  45 {
  46         struct _LoadTileData *data = _data;
  47         GisPluginMap *self   = data->self;
  48         GisTile      *tile   = data->tile;
  49         GdkPixbuf    *pixbuf = data->pixbuf;
  50         g_free(data);
  51
  52         /* Create Texture */
  53         g_debug("GisPluginMap: _load_tile_cb start");
  54         guchar   *pixels = gdk_pixbuf_get_pixels(pixbuf);
  55         gboolean  alpha  = gdk_pixbuf_get_has_alpha(pixbuf);
  56         gint      width  = gdk_pixbuf_get_width(pixbuf);
  57         gint      height = gdk_pixbuf_get_height(pixbuf);
  58
  59         for (int i = 0; i < width*height; i++) {
  60                 for (int j = 0; j < G_N_ELEMENTS(colormap); j++) {
  61                         if (pixels[i*4+0] == colormap[j][0][0] &&
  62                             pixels[i*4+1] == colormap[j][0][1] &&
  63                             pixels[i*4+2] == colormap[j][0][2]) {
  64                                 pixels[i*4+0] = colormap[j][1][0];
  65                                 pixels[i*4+1] = colormap[j][1][1];
  66                                 pixels[i*4+2] = colormap[j][1][2];
  67                                 pixels[i*4+3] = colormap[j][1][3];
  68                                 break;
  69                         }
  70                 }
  71         }
  72
  73         guint *tex = g_new0(guint, 1);
  74         gis_viewer_begin(self->viewer);
  75         glGenTextures(1, tex);
  76         glBindTexture(GL_TEXTURE_2D, *tex);
  77
  78         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
  79         glPixelStorei(GL_PACK_ALIGNMENT, 1);
  80         glTexImage2D(GL_TEXTURE_2D, 0, 4, width, height, 0,
  81                         (alpha ? GL_RGBA : GL_RGB), 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         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
  85         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
  86         glFlush();
  87         gis_viewer_end(self->viewer);
  88
  89         tile->data = tex;
  90         gtk_widget_queue_draw(GTK_WIDGET(self->viewer));
  91         g_object_unref(pixbuf);
  92         return FALSE;
  93 }
  94
  95 static void _load_tile(GisTile *tile, gpointer _self)
  96 {
  97         GisPluginMap *self = _self;
  98         g_debug("GisPluginMap: _load_tile start %p", g_thread_self());
  99         char *path = gis_wms_make_local(self->wms, tile);
 100         struct _LoadTileData *data = g_new0(struct _LoadTileData, 1);
 101         data->self   = self;
 102         data->tile   = tile;
 103         data->pixbuf = gdk_pixbuf_new_from_file(path, NULL);
 104         if (data->pixbuf) {
 105                 g_idle_add_full(G_PRIORITY_LOW, _load_tile_cb, data, NULL);
 106         } else {
 107                 g_warning("GisPluginMap: _load_tile - Error loading pixbuf %s", path);
 108                 g_remove(path);
 109         }
 110         g_free(path);
 111         g_debug("GisPluginMap: _load_tile end %p", g_thread_self());
 112 }
 113
 114 static gboolean _free_tile_cb(gpointer data)
 115 {
 116         glDeleteTextures(1, data);
 117         g_free(data);
 118         return FALSE;
 119 }
 120 static void _free_tile(GisTile *tile, gpointer _self)
 121 {
 122         GisPluginMap *self = _self;
 123         g_debug("GisPluginMap: _free_tile: %p=%d", tile->data, *(guint*)tile->data);
 124         g_idle_add_full(G_PRIORITY_LOW, _free_tile_cb, tile->data, NULL);
 125 }
 126
 127 static gpointer _update_tiles(gpointer _self)
 128 {
 129         g_debug("GisPluginMap: _update_tiles");
 130         GisPluginMap *self = _self;
 131         g_mutex_lock(self->mutex);
 132         gdouble lat, lon, elev;
 133         gis_viewer_get_location(self->viewer, &lat, &lon, &elev);
 134         gis_tile_update(self->tiles,
 135                         MAX_RESOLUTION, TILE_WIDTH, TILE_WIDTH,
 136                         lat, lon, elev,
 137                         _load_tile, self);
 138         gis_tile_gc(self->tiles, time(NULL)-10,
 139                         _free_tile, self);
 140         g_mutex_unlock(self->mutex);
 141         return NULL;
 142 }
 143
 144 /*************
 145  * Callbacks *
 146  *************/
 147 static void _on_location_changed(GisViewer *viewer,
 148                 gdouble lat, gdouble lon, gdouble elev, GisPluginMap *self)
 149 {
 150         g_thread_create(_update_tiles, self, FALSE, NULL);
 151 }
 152
 153 static gpointer _expose(GisCallback *callback, gpointer _self)
 154 {
 155         GisPluginMap *self = GIS_PLUGIN_MAP(_self);
 156         g_debug("GisPluginMap: expose viewer=%p tiles=%p,%p",
 157                         self->viewer, self->tiles, self->tiles->data);
 158         gis_viewer_render_tiles(self->viewer, self->tiles);
 159         return NULL;
 160 }
 161
 162 /***********
 163  * Methods *
 164  ***********/
 165 GisPluginMap *gis_plugin_map_new(GisViewer *viewer)
 166 {
 167         g_debug("GisPluginMap: new");
 168         GisPluginMap *self = g_object_new(GIS_TYPE_PLUGIN_MAP, NULL);
 169         self->viewer = g_object_ref(viewer);
 170
 171         /* Load initial tiles */
 172         _load_tile(self->tiles, self);
 173         g_thread_create(_update_tiles, self, FALSE, NULL);
 174
 175         /* Connect signals */
 176         self->sigid = g_signal_connect(self->viewer, "location-changed",
 177                         G_CALLBACK(_on_location_changed), self);
 178
 179         /* Add renderers */
 180         GisCallback *callback = gis_callback_new(_expose, self);
 181         gis_viewer_add(viewer, GIS_OBJECT(callback), GIS_LEVEL_OVERLAY, 0);
 182
 183         return self;
 184 }
 185
 186
 187 /****************
 188  * GObject code *
 189  ****************/
 190 /* Plugin init */
 191 static void gis_plugin_map_plugin_init(GisPluginInterface *iface);
 192 G_DEFINE_TYPE_WITH_CODE(GisPluginMap, gis_plugin_map, G_TYPE_OBJECT,
 193                 G_IMPLEMENT_INTERFACE(GIS_TYPE_PLUGIN,
 194                         gis_plugin_map_plugin_init));
 195 static void gis_plugin_map_plugin_init(GisPluginInterface *iface)
 196 {
 197         g_debug("GisPluginMap: plugin_init");
 198         /* Add methods to the interface */
 199 }
 200 /* Class/Object init */
 201 static void gis_plugin_map_init(GisPluginMap *self)
 202 {
 203         g_debug("GisPluginMap: init");
 204         /* Set defaults */
 205         self->mutex  = g_mutex_new();
 206         self->tiles  = gis_tile_new(NULL, NORTH, SOUTH, EAST, WEST);
 207         self->wms    = gis_wms_new(
 208                 "http://labs.metacarta.com/wms/vmap0", "basic", "image/png",
 209                 "osm/", "png", TILE_WIDTH, TILE_HEIGHT);
 210 }
 211 static void gis_plugin_map_dispose(GObject *gobject)
 212 {
 213         g_debug("GisPluginMap: dispose");
 214         GisPluginMap *self = GIS_PLUGIN_MAP(gobject);
 215         /* Drop references */
 216         if (self->viewer) {
 217                 g_signal_handler_disconnect(self->viewer, self->sigid);
 218                 g_object_unref(self->viewer);
 219                 self->viewer = NULL;
 220         }
 221         G_OBJECT_CLASS(gis_plugin_map_parent_class)->dispose(gobject);
 222 }
 223 static void gis_plugin_map_finalize(GObject *gobject)
 224 {
 225         g_debug("GisPluginMap: finalize");
 226         GisPluginMap *self = GIS_PLUGIN_MAP(gobject);
 227         /* Free data */
 228         gis_tile_free(self->tiles, _free_tile, self);
 229         gis_wms_free(self->wms);
 230         g_mutex_free(self->mutex);
 231         G_OBJECT_CLASS(gis_plugin_map_parent_class)->finalize(gobject);
 232
 233 }
 234 static void gis_plugin_map_class_init(GisPluginMapClass *klass)
 235 {
 236         g_debug("GisPluginMap: class_init");
 237         GObjectClass *gobject_class = (GObjectClass*)klass;
 238         gobject_class->dispose  = gis_plugin_map_dispose;
 239         gobject_class->finalize = gis_plugin_map_finalize;
 240 }