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

   1 /*
   2  * Copyright (C) 2009 Andy Spencer <spenceal@rose-hulman.edu>
   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 <GL/gl.h>
  20
  21 #include <gis.h>
  22
  23 #include "bmng.h"
  24
  25 #define MAX_RESOLUTION 500
  26 #define TILE_WIDTH     1024
  27 #define TILE_HEIGHT    512
  28
  29 struct _LoadTileData {
  30         GisPluginBmng *self;
  31         GisTile       *tile;
  32         GdkPixbuf     *pixbuf;
  33 };
  34 static gboolean _load_tile_cb(gpointer _data)
  35 {
  36         struct _LoadTileData *data = _data;
  37         GisPluginBmng *self   = data->self;
  38         GisTile       *tile   = data->tile;
  39         GdkPixbuf     *pixbuf = data->pixbuf;
  40         g_free(data);
  41
  42         /* Create Texture */
  43         g_debug("GisPluginBmng: _load_tile_cb start");
  44         guchar   *pixels = gdk_pixbuf_get_pixels(pixbuf);
  45         gboolean  alpha  = gdk_pixbuf_get_has_alpha(pixbuf);
  46         gint      width  = gdk_pixbuf_get_width(pixbuf);
  47         gint      height = gdk_pixbuf_get_height(pixbuf);
  48
  49         guint *tex = g_new0(guint, 1);
  50         gis_opengl_begin(self->opengl);
  51         glGenTextures(1, tex);
  52         glBindTexture(GL_TEXTURE_2D, *tex);
  53
  54         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
  55         glPixelStorei(GL_PACK_ALIGNMENT, 1);
  56         glTexImage2D(GL_TEXTURE_2D, 0, 4, width, height, 0,
  57                         (alpha ? GL_RGBA : GL_RGB), GL_UNSIGNED_BYTE, pixels);
  58         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
  59         glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
  60         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
  61         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
  62         glFlush();
  63         gis_opengl_end(self->opengl);
  64
  65         tile->data = tex;
  66         gis_opengl_redraw(self->opengl);
  67         g_object_unref(pixbuf);
  68         return FALSE;
  69 }
  70
  71 static void _load_tile(GisTile *tile, gpointer _self)
  72 {
  73         GisPluginBmng *self = _self;
  74         g_debug("GisPluginBmng: _load_tile start %p", g_thread_self());
  75         char *path = gis_wms_make_local(self->wms, tile);
  76         struct _LoadTileData *data = g_new0(struct _LoadTileData, 1);
  77         data->self   = self;
  78         data->tile   = tile;
  79         data->pixbuf = gdk_pixbuf_new_from_file(path, NULL);
  80         g_free(path);
  81         g_idle_add_full(G_PRIORITY_LOW, _load_tile_cb, data, NULL);
  82         g_debug("GisPluginBmng: _load_tile end %p", g_thread_self());
  83 }
  84
  85 static gboolean _free_tile_cb(gpointer data)
  86 {
  87         glDeleteTextures(1, data);
  88         g_free(data);
  89         return FALSE;
  90 }
  91 static void _free_tile(GisTile *tile, gpointer _self)
  92 {
  93         GisPluginBmng *self = _self;
  94         g_debug("GisPluginBmng: _free_tile: %p=%d", tile->data, *(guint*)tile->data);
  95         g_idle_add_full(G_PRIORITY_LOW, _free_tile_cb, tile->data, NULL);
  96 }
  97
  98 static gpointer _update_tiles(gpointer _self)
  99 {
 100         g_debug("GisPluginBmng: _update_tiles");
 101         GisPluginBmng *self = _self;
 102         g_mutex_lock(self->mutex);
 103         gdouble lat, lon, elev;
 104         gis_view_get_location(self->view, &lat, &lon, &elev);
 105         gis_tile_update(self->tiles,
 106                         MAX_RESOLUTION, TILE_WIDTH, TILE_WIDTH,
 107                         lat, lon, elev,
 108                         _load_tile, self);
 109         gis_tile_gc(self->tiles, time(NULL)-10,
 110                         _free_tile, self);
 111         g_mutex_unlock(self->mutex);
 112         return NULL;
 113 }
 114
 115 /*************
 116  * Callbacks *
 117  *************/
 118 static void _on_location_changed(GisView *view, gdouble lat, gdouble lon, gdouble elev,
 119                 GisPluginBmng *self)
 120 {
 121         g_thread_create(_update_tiles, self, FALSE, NULL);
 122 }
 123
 124 /***********
 125  * Methods *
 126  ***********/
 127 GisPluginBmng *gis_plugin_bmng_new(GisWorld *world, GisView *view, GisOpenGL *opengl)
 128 {
 129         g_debug("GisPluginBmng: new");
 130         GisPluginBmng *self = g_object_new(GIS_TYPE_PLUGIN_BMNG, NULL);
 131         self->view   = view;
 132         self->opengl = opengl;
 133
 134         /* Load initial tiles */
 135         _load_tile(self->tiles, self);
 136         g_thread_create(_update_tiles, self, FALSE, NULL);
 137
 138         /* Connect signals */
 139         self->sigid = g_signal_connect(self->view, "location-changed",
 140                         G_CALLBACK(_on_location_changed), self);
 141
 142         return self;
 143 }
 144
 145 static void gis_plugin_bmng_expose(GisPlugin *_self)
 146 {
 147         GisPluginBmng *self = GIS_PLUGIN_BMNG(_self);
 148         g_debug("GisPluginBmng: expose opengl=%p tiles=%p,%p",
 149                         self->opengl, self->tiles, self->tiles->data);
 150         gis_opengl_render_tiles(self->opengl, self->tiles);
 151 }
 152
 153
 154 /****************
 155  * GObject code *
 156  ****************/
 157 /* Plugin init */
 158 static void gis_plugin_bmng_plugin_init(GisPluginInterface *iface);
 159 G_DEFINE_TYPE_WITH_CODE(GisPluginBmng, gis_plugin_bmng, G_TYPE_OBJECT,
 160                 G_IMPLEMENT_INTERFACE(GIS_TYPE_PLUGIN,
 161                         gis_plugin_bmng_plugin_init));
 162 static void gis_plugin_bmng_plugin_init(GisPluginInterface *iface)
 163 {
 164         g_debug("GisPluginBmng: plugin_init");
 165         /* Add methods to the interface */
 166         iface->expose = gis_plugin_bmng_expose;
 167 }
 168 /* Class/Object init */
 169 static void gis_plugin_bmng_init(GisPluginBmng *self)
 170 {
 171         g_debug("GisPluginBmng: init");
 172         /* Set defaults */
 173         self->mutex = g_mutex_new();
 174         self->tiles = gis_tile_new(NULL, NORTH, SOUTH, EAST, WEST);
 175         self->wms   = gis_wms_new(
 176                 "http://www.nasa.network.com/wms", "bmng200406", "image/jpeg",
 177                 "bmng/", "jpg", TILE_WIDTH, TILE_HEIGHT);
 178 }
 179 static void gis_plugin_bmng_dispose(GObject *gobject)
 180 {
 181         g_debug("GisPluginBmng: dispose");
 182         GisPluginBmng *self = GIS_PLUGIN_BMNG(gobject);
 183         /* Drop references */
 184         g_signal_handler_disconnect(self->view, self->sigid);
 185         G_OBJECT_CLASS(gis_plugin_bmng_parent_class)->dispose(gobject);
 186 }
 187 static void gis_plugin_bmng_finalize(GObject *gobject)
 188 {
 189         g_debug("GisPluginBmng: finalize");
 190         GisPluginBmng *self = GIS_PLUGIN_BMNG(gobject);
 191         /* Free data */
 192         gis_tile_free(self->tiles, _free_tile, self);
 193         gis_wms_free(self->wms);
 194         g_mutex_free(self->mutex);
 195         G_OBJECT_CLASS(gis_plugin_bmng_parent_class)->finalize(gobject);
 196
 197 }
 198 static void gis_plugin_bmng_class_init(GisPluginBmngClass *klass)
 199 {
 200         g_debug("GisPluginBmng: class_init");
 201         GObjectClass *gobject_class = (GObjectClass*)klass;
 202         gobject_class->dispose  = gis_plugin_bmng_dispose;
 203         gobject_class->finalize = gis_plugin_bmng_finalize;
 204 }