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