* greyscale elevation overlay on the planets surface.
*/
+#include <time.h>
#include <glib/gstdio.h>
#include <grits.h>
#include "elev.h"
+/* Configuration */
+#define LOAD_BIL TRUE
+#define LOAD_TEX FALSE
+
+/* Tile size constnats */
#define MAX_RESOLUTION 50
#define TILE_WIDTH 1024
#define TILE_HEIGHT 512
+#define TILE_CHANNELS 4
#define TILE_SIZE (TILE_WIDTH*TILE_HEIGHT*sizeof(guint16))
struct _TileData {
- /* OpenGL has to be first to make grits_opengl_render_tiles happy */
- guint opengl;
- guint16 *bil;
+ /* OpenGL has to be first to make grits_tile_draw happy */
+ guint tex;
+ guint16 *bil;
};
static gdouble _height_func(gdouble lat, gdouble lon, gpointer _elev)
/**********************
* Loader and Freeers *
**********************/
-#define LOAD_BIL TRUE
-#define LOAD_OPENGL FALSE
+
struct _LoadTileData {
- GritsPluginElev *elev;
- gchar *path;
- GritsTile *tile;
- GdkPixbuf *pixbuf;
- struct _TileData *data;
+ GritsPluginElev *elev;
+ GritsTile *tile;
+ guint8 *pixels;
+ struct _TileData *tdata;
};
+
static guint16 *_load_bil(gchar *path)
{
gsize len;
}
return (guint16*)data;
}
-static GdkPixbuf *_load_pixbuf(guint16 *bil)
+
+static guchar *_load_pixels(guint16 *bil)
{
- GdkPixbuf *pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, TILE_WIDTH, TILE_HEIGHT);
- guchar *pixels = gdk_pixbuf_get_pixels(pixbuf);
- gint stride = gdk_pixbuf_get_rowstride(pixbuf);
- gint nchan = gdk_pixbuf_get_n_channels(pixbuf);
+ g_assert(TILE_CHANNELS == 4);
+
+ guchar (*pixels)[TILE_WIDTH][TILE_CHANNELS]
+ = g_malloc0(TILE_HEIGHT * TILE_WIDTH * TILE_CHANNELS);
for (int r = 0; r < TILE_HEIGHT; r++) {
for (int c = 0; c < TILE_WIDTH; c++) {
gint16 value = bil[r*TILE_WIDTH + c];
- //guchar color = (float)(MAX(value,0))/8848 * 255;
guchar color = (float)value/8848 * 255;
- pixels[r*stride + c*nchan + 0] = color;
- pixels[r*stride + c*nchan + 1] = color;
- pixels[r*stride + c*nchan + 2] = color;
- if (nchan == 4)
- pixels[r*stride + c*nchan + 3] = 128;
+ //guchar color = (float)(MAX(value,0))/8848 * 255;
+ pixels[r][c][0] = color;
+ pixels[r][c][1] = color;
+ pixels[r][c][2] = color;
+ pixels[r][c][3] = 0xff;
}
}
- g_debug("GritsPluginElev: load_pixbuf %p", pixbuf);
- return pixbuf;
-}
-static guint _load_opengl(GdkPixbuf *pixbuf)
-{
- /* Load image */
- guchar *pixels = gdk_pixbuf_get_pixels(pixbuf);
- gint alpha = gdk_pixbuf_get_has_alpha(pixbuf);
- gint nchan = 4; // gdk_pixbuf_get_n_channels(pixbuf);
- gint width = gdk_pixbuf_get_width(pixbuf);
- gint height = gdk_pixbuf_get_height(pixbuf);
-
- /* Create Texture */
- guint opengl;
- glGenTextures(1, &opengl);
- glBindTexture(GL_TEXTURE_2D, opengl);
-
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- glPixelStorei(GL_PACK_ALIGNMENT, 1);
- glTexImage2D(GL_TEXTURE_2D, 0, nchan, 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_EDGE);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-
- g_debug("GritsPluginElev: load_opengl %d", opengl);
- return opengl;
+
+ g_debug("GritsPluginElev: load_pixels %p", pixels);
+ return (guchar*)pixels;
}
-static gboolean _load_tile_cb(gpointer _load)
+
+static gboolean _load_tile_cb(gpointer _data)
{
- struct _LoadTileData *load = _load;
- g_debug("GritsPluginElev: _load_tile_cb: %s", load->path);
- GritsPluginElev *elev = load->elev;
- GritsTile *tile = load->tile;
- GdkPixbuf *pixbuf = load->pixbuf;
- struct _TileData *data = load->data;
- g_free(load->path);
- g_free(load);
-
- if (LOAD_OPENGL)
- data->opengl = _load_opengl(pixbuf);
-
- tile->data = data;
-
- /* Do necessasairy processing */
- /* TODO: Lock this and move to thread, can remove elev from _load then */
- if (LOAD_BIL)
- grits_viewer_set_height_func(elev->viewer, &tile->edge,
- _height_func, elev, TRUE);
+ struct _LoadTileData *data = _data;
+ struct _TileData *tdata = data->tdata;
+ g_debug("GritsPluginElev: _load_tile_cb start");
+
+ /* Load OpenGL texture (from main thread) */
+ if (data->pixels) {
+ glGenTextures(1, &tdata->tex);
+ glBindTexture(GL_TEXTURE_2D, tdata->tex);
+
+ glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+ glPixelStorei(GL_PACK_ALIGNMENT, 1);
+ glTexImage2D(GL_TEXTURE_2D, 0, TILE_CHANNELS, TILE_WIDTH, TILE_HEIGHT, 0,
+ GL_RGBA, GL_UNSIGNED_BYTE, data->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_EDGE);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+ glFlush();
+ }
- /* Cleanup unneeded things */
- if (!LOAD_BIL)
- g_free(data->bil);
- if (LOAD_OPENGL)
- g_object_unref(pixbuf);
+ /* Set hight function (from main thread) */
+ if (tdata->bil) {
+ grits_viewer_set_height_func(data->elev->viewer, &data->tile->edge,
+ _height_func, data->elev, TRUE);
+ }
+
+ /* Queue tiles for drawing */
+ data->tile->data = tdata;
+ gtk_widget_queue_draw(GTK_WIDGET(data->elev->viewer));
+ /* Cleanup */
+ g_free(data->pixels);
+ g_free(data);
return FALSE;
}
+
static void _load_tile(GritsTile *tile, gpointer _elev)
{
GritsPluginElev *elev = _elev;
+ guint16 *bil = NULL;
+ guchar *pixels = NULL;
- struct _LoadTileData *load = g_new0(struct _LoadTileData, 1);
- load->path = grits_wms_fetch(elev->wms, tile, GRITS_ONCE, NULL, NULL);
- if (!load->path) return; // Canceled/error
- g_debug("GritsPluginElev: _load_tile: %s", load->path);
- load->elev = elev;
- load->tile = tile;
- load->data = g_new0(struct _TileData, 1);
- if (LOAD_BIL || LOAD_OPENGL) {
- load->data->bil = _load_bil(load->path);
- if (!load->data->bil) {
- g_remove(load->path);
- g_free(load->data);
- g_free(load->path);
- g_free(load);
- return;
- }
- }
- if (LOAD_OPENGL) {
- load->pixbuf = _load_pixbuf(load->data->bil);
+ g_debug("GritsPluginElev: _load_tile start %p", g_thread_self());
+ if (elev->aborted) {
+ g_debug("GritsPluginElev: _load_tile - aborted");
+ return;
}
- g_idle_add_full(G_PRIORITY_LOW, _load_tile_cb, load, NULL);
+ /* Download tile */
+ gchar *path = grits_wms_fetch(elev->wms, tile, GRITS_ONCE, NULL, NULL);
+ if (!path) return;
+
+ /* Load bil */
+ bil = _load_bil(path);
+ g_free(path);
+ if (!bil) return;
+
+ /* Load pixels */
+ if (LOAD_TEX)
+ pixels = _load_pixels(bil);
+ if (!LOAD_BIL)
+ g_free(bil);
+
+ /* Copy pixbuf data for callback */
+ struct _LoadTileData *data = g_new0(struct _LoadTileData, 1);
+ struct _TileData *tdata = g_new0(struct _TileData, 1);
+ data->elev = elev;
+ data->tile = tile;
+ data->pixels = pixels;
+ data->tdata = tdata;
+ tdata->tex = 0;
+ tdata->bil = bil;
+
+ /* Load the GL texture from the main thread */
+ g_idle_add_full(G_PRIORITY_LOW, _load_tile_cb, data, NULL);
+ g_debug("GritsPluginElev: _load_tile end %p", g_thread_self());
}
static gboolean _free_tile_cb(gpointer _data)
struct _TileData *data = _data;
if (LOAD_BIL)
g_free(data->bil);
- if (LOAD_OPENGL)
- glDeleteTextures(1, &data->opengl);
+ if (LOAD_TEX)
+ glDeleteTextures(1, &data->tex);
g_free(data);
return FALSE;
}
g_idle_add_full(G_PRIORITY_LOW, _free_tile_cb, tile->data, NULL);
}
-static gpointer _update_tiles(gpointer _elev)
+static void _update_tiles(gpointer _, gpointer _elev)
{
+ g_debug("GritsPluginElev: _update_tiles");
GritsPluginElev *elev = _elev;
- if (!g_mutex_trylock(&elev->mutex))
- return NULL;
GritsPoint eye;
grits_viewer_get_location(elev->viewer, &eye.lat, &eye.lon, &eye.elev);
grits_tile_update(elev->tiles, &eye,
_load_tile, elev);
grits_tile_gc(elev->tiles, time(NULL)-10,
_free_tile, elev);
- g_mutex_unlock(&elev->mutex);
- return NULL;
}
/*************
static void _on_location_changed(GritsViewer *viewer,
gdouble lat, gdouble lon, gdouble elevation, GritsPluginElev *elev)
{
- g_thread_new("update-tiles-thread", _update_tiles, elev);
-}
-
-static gpointer _threaded_init(GritsPluginElev *elev)
-{
- _load_tile(elev->tiles, elev);
- _update_tiles(elev);
- return NULL;
+ g_thread_pool_push(elev->threads, NULL+1, NULL);
}
/***********
elev->viewer = g_object_ref(viewer);
/* Load initial tiles */
- g_thread_new("init-thread", (GThreadFunc)_threaded_init, elev);
+ _load_tile(elev->tiles, elev);
+ _update_tiles(NULL, elev);
/* Connect signals */
elev->sigid = g_signal_connect(elev->viewer, "location-changed",
G_CALLBACK(_on_location_changed), elev);
/* Add renderers */
- if (LOAD_OPENGL)
+ if (LOAD_TEX)
grits_viewer_add(viewer, GRITS_OBJECT(elev->tiles), GRITS_LEVEL_WORLD, FALSE);
return elev;
{
g_debug("GritsPluginElev: init");
/* Set defaults */
- g_mutex_init(&elev->mutex);
+ elev->threads = g_thread_pool_new(_update_tiles, elev, 1, FALSE, NULL);
elev->tiles = grits_tile_new(NULL, NORTH, SOUTH, EAST, WEST);
elev->wms = grits_wms_new(
"http://www.nasa.network.com/elev", "mergedSrtm", "application/bil",
"srtm/", "bil", TILE_WIDTH, TILE_HEIGHT);
+ g_object_ref(elev->tiles);
}
static void grits_plugin_elev_dispose(GObject *gobject)
{
g_debug("GritsPluginElev: dispose");
GritsPluginElev *elev = GRITS_PLUGIN_ELEV(gobject);
+ elev->aborted = TRUE;
/* Drop references */
if (elev->viewer) {
- if (LOAD_BIL)
- grits_viewer_clear_height_func(elev->viewer);
- if (LOAD_OPENGL)
- grits_viewer_remove(elev->viewer, GRITS_OBJECT(elev->tiles));
- g_signal_handler_disconnect(elev->viewer, elev->sigid);
- g_object_unref(elev->viewer);
+ GritsViewer *viewer = elev->viewer;
elev->viewer = NULL;
+ g_signal_handler_disconnect(viewer, elev->sigid);
+ if (LOAD_BIL)
+ grits_viewer_clear_height_func(viewer);
+ if (LOAD_TEX)
+ grits_viewer_remove(viewer, GRITS_OBJECT(elev->tiles));
+ soup_session_abort(elev->wms->http->soup);
+ g_thread_pool_free(elev->threads, TRUE, TRUE);
+ while (gtk_events_pending())
+ gtk_main_iteration();
+ g_object_unref(viewer);
}
G_OBJECT_CLASS(grits_plugin_elev_parent_class)->dispose(gobject);
}
g_debug("GritsPluginElev: finalize");
GritsPluginElev *elev = GRITS_PLUGIN_ELEV(gobject);
/* Free data */
- grits_tile_free(elev->tiles, _free_tile, elev);
grits_wms_free(elev->wms);
- g_mutex_lock(&elev->mutex);
- g_mutex_unlock(&elev->mutex);
- g_mutex_clear(&elev->mutex);
+ grits_tile_free(elev->tiles, _free_tile, elev);
G_OBJECT_CLASS(grits_plugin_elev_parent_class)->finalize(gobject);
}
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