Add function to get a trackpoint by distance along a track.

[andy/viking.git] / src / mapcache.c

diff --git a/src/mapcache.c b/src/mapcache.c
index 6df3d8c16ae13f449a18183bba0e806b77aebef0..7b731bc311f71a743ddf59ad083baf0daa4f419c 100644 (file)
--- a/src/mapcache.c
+++ b/src/mapcache.c
@@ -18,10 +18,16 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  *
  */
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  *
  */

+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif

 
 #include <gtk/gtk.h>
 
 #include <gtk/gtk.h>

+#include <glib/gi18n.h>

 #include <string.h>
 #include <string.h>

+#include "globals.h"

 #include "mapcache.h"
 #include "mapcache.h"

+#include "preferences.h"

 
 #include "config.h"
 
 
 #include "config.h"
 


@@ -35,20 +41,56 @@ typedef struct _List {
 static List *queue_tail = NULL;
 static int queue_count = 0;
 
 static List *queue_tail = NULL;
 static int queue_count = 0;
 

-#define VIK_CONFIG_MAPCACHE_MAX_SIZE 50331648 /* 48 meggerbytes */

 static guint32 queue_size = 0;
 static guint32 queue_size = 0;

+static guint32 max_queue_size = VIK_CONFIG_MAPCACHE_SIZE * 1024 * 1024;

 
 
 static GHashTable *cache = NULL;
 
 
 
 static GHashTable *cache = NULL;
 

+static GMutex *mc_mutex = NULL;
+

 #define HASHKEY_FORMAT_STRING "%d-%d-%d-%d-%d-%d-%.3f-%.3f"
 #define HASHKEY_FORMAT_STRING_NOSHRINK_NOR_ALPHA "%d-%d-%d-%d-%d-"
 
 #define HASHKEY_FORMAT_STRING "%d-%d-%d-%d-%d-%d-%.3f-%.3f"
 #define HASHKEY_FORMAT_STRING_NOSHRINK_NOR_ALPHA "%d-%d-%d-%d-%d-"
 

+static VikLayerParamScale params_scales[] = {
+  /* min, max, step, digits (decimal places) */
+ { 1, 1024, 1, 0 },
+};
+
+static VikLayerParam prefs[] = {
+  { VIK_LAYER_NUM_TYPES, VIKING_PREFERENCES_NAMESPACE "mapcache_size", VIK_LAYER_PARAM_UINT, VIK_LAYER_GROUP_NONE, N_("Map cache memory size (MB):"), VIK_LAYER_WIDGET_HSCALE, params_scales, NULL, NULL },
+};
+

 void a_mapcache_init ()
 {
 void a_mapcache_init ()
 {

+  VikLayerParamData tmp;
+  tmp.u = VIK_CONFIG_MAPCACHE_SIZE;
+  a_preferences_register(prefs, tmp, VIKING_PREFERENCES_GROUP_KEY);
+
+  mc_mutex = g_mutex_new();

   cache = g_hash_table_new_full ( g_str_hash, g_str_equal, g_free, g_object_unref );
 }
 
   cache = g_hash_table_new_full ( g_str_hash, g_str_equal, g_free, g_object_unref );
 }
 

+static void cache_add(gchar *key, GdkPixbuf *pixbuf)
+{
+  /* TODO: Check if already exists */
+  g_hash_table_insert ( cache, key, pixbuf );
+  queue_size += gdk_pixbuf_get_rowstride(pixbuf) * gdk_pixbuf_get_height(pixbuf);
+  queue_size += 100;
+  queue_count++;
+}
+
+static void cache_remove(const gchar *key)
+{
+    GdkPixbuf *buf = g_hash_table_lookup ( cache, key );
+    if (buf) {
+      queue_size -= gdk_pixbuf_get_rowstride(buf) * gdk_pixbuf_get_height(buf);
+      queue_size -= 100;
+      queue_count --;
+      g_hash_table_remove ( cache, key );
+    }
+}
+

 /* returns key from head, adds on newtailkey to tail. */
 static gchar *list_shift_add_entry ( gchar *newtailkey )
 {
 /* returns key from head, adds on newtailkey to tail. */
 static gchar *list_shift_add_entry ( gchar *newtailkey )
 {


@@ -82,38 +124,25 @@ static void list_add_entry ( gchar *key )
   }
 }
 
   }
 }
 

-void a_mapcache_add ( GdkPixbuf *pixbuf, gint x, gint y, gint z, guint8 type, guint zoom, guint8 alpha, gdouble xshrinkfactor, gdouble yshrinkfactor )
+void a_mapcache_add ( GdkPixbuf *pixbuf, gint x, gint y, gint z, guint16 type, guint zoom, guint8 alpha, gdouble xshrinkfactor, gdouble yshrinkfactor )

 {
   gchar *key = g_strdup_printf ( HASHKEY_FORMAT_STRING, x, y, z, type, zoom, alpha, xshrinkfactor, yshrinkfactor );
   static int tmp = 0;
 
 {
   gchar *key = g_strdup_printf ( HASHKEY_FORMAT_STRING, x, y, z, type, zoom, alpha, xshrinkfactor, yshrinkfactor );
   static int tmp = 0;
 

-  /* FIXME: what if already exists? problem! */
-  g_hash_table_insert ( cache, key, pixbuf );
+  g_mutex_lock(mc_mutex);
+  cache_add(key, pixbuf);

 
 

-  queue_size += gdk_pixbuf_get_rowstride(pixbuf) * gdk_pixbuf_get_height(pixbuf);
-  queue_size += 100;
-  queue_count++;
+  // TODO: that should be done on preference change only...
+  max_queue_size = a_preferences_get(VIKING_PREFERENCES_NAMESPACE "mapcache_size")->u * 1024 * 1024;

 
 

-  if ( queue_size > VIK_CONFIG_MAPCACHE_SIZE ) {
+  if ( queue_size > max_queue_size ) {

     gchar *oldkey = list_shift_add_entry ( key );
     gchar *oldkey = list_shift_add_entry ( key );

-    GdkPixbuf *oldbuf = g_hash_table_lookup ( cache, oldkey );
-    queue_size -= gdk_pixbuf_get_rowstride(oldbuf) * gdk_pixbuf_get_height(oldbuf);
-    queue_size -= 100;
-    queue_count --;
-    g_hash_table_remove ( cache, oldkey );
-
-    /* should delete BEFORE adding -- not really possible because don't know size,
-     * but you could guess size (only applic if add big file to full cache) */
-
+    cache_remove(oldkey);

 
 

-    while ( queue_size > VIK_CONFIG_MAPCACHE_SIZE &&
+    while ( queue_size > max_queue_size &&

         (queue_tail->next != queue_tail) ) { /* make sure there's more than one thing to delete */
       oldkey = list_shift ();
         (queue_tail->next != queue_tail) ) { /* make sure there's more than one thing to delete */
       oldkey = list_shift ();

-      oldbuf = g_hash_table_lookup ( cache, oldkey );
-      queue_size -= gdk_pixbuf_get_rowstride(oldbuf) * gdk_pixbuf_get_height(oldbuf);
-      queue_size -= 100;
-      queue_count --;
-      g_hash_table_remove ( cache, oldkey );
+      cache_remove(oldkey);

     }
 
     /* chop off 'start' etc */
     }
 
     /* chop off 'start' etc */


@@ -121,18 +150,19 @@ void a_mapcache_add ( GdkPixbuf *pixbuf, gint x, gint y, gint z, guint8 type, gu
     list_add_entry ( key );
     /* business as usual */
   }
     list_add_entry ( key );
     /* business as usual */
   }

+  g_mutex_unlock(mc_mutex);

 
 

-  if ( (++tmp == 100 ))  { g_print("DEBUG: queue count=%d %ld\n", queue_count, queue_size ); tmp=0; }
+  if ( (++tmp == 100 ))  { g_print("DEBUG: queue count=%d size=%u\n", queue_count, queue_size ); tmp=0; }

 }
 
 }
 

-GdkPixbuf *a_mapcache_get ( gint x, gint y, gint z, guint8 type, guint zoom, guint8 alpha, gdouble xshrinkfactor, gdouble yshrinkfactor )
+GdkPixbuf *a_mapcache_get ( gint x, gint y, gint z, guint16 type, guint zoom, guint8 alpha, gdouble xshrinkfactor, gdouble yshrinkfactor )

 {
   static char key[48];
   g_snprintf ( key, sizeof(key), HASHKEY_FORMAT_STRING, x, y, z, type, zoom, alpha, xshrinkfactor, yshrinkfactor );
   return g_hash_table_lookup ( cache, key );
 }
 
 {
   static char key[48];
   g_snprintf ( key, sizeof(key), HASHKEY_FORMAT_STRING, x, y, z, type, zoom, alpha, xshrinkfactor, yshrinkfactor );
   return g_hash_table_lookup ( cache, key );
 }
 

-void a_mapcache_remove_all_shrinkfactors ( guint16 x, guint16 y, guint16 z, guint8 type, guint zoom )
+void a_mapcache_remove_all_shrinkfactors ( gint x, gint y, gint z, guint16 type, guint zoom )

 {
   char key[40];
   List *loop = queue_tail;
 {
   char key[40];
   List *loop = queue_tail;


@@ -145,16 +175,20 @@ void a_mapcache_remove_all_shrinkfactors ( guint16 x, guint16 y, guint16 z, guin
   g_snprintf ( key, sizeof(key), HASHKEY_FORMAT_STRING_NOSHRINK_NOR_ALPHA, x, y, z, type, zoom );
   len = strlen(key);
 
   g_snprintf ( key, sizeof(key), HASHKEY_FORMAT_STRING_NOSHRINK_NOR_ALPHA, x, y, z, type, zoom );
   len = strlen(key);
 

+  g_mutex_lock(mc_mutex);

   /* TODO: check logic here */
   do {
     tmp = loop->next;
     if ( strncmp(tmp->key, key, len) == 0 )
     {
   /* TODO: check logic here */
   do {
     tmp = loop->next;
     if ( strncmp(tmp->key, key, len) == 0 )
     {

-      g_hash_table_remove ( cache, tmp->key );
-      if ( tmp == loop )
+      cache_remove(tmp->key);
+      if ( tmp == loop ) /* we deleted the last thing in the queue! */

         loop = queue_tail = NULL;
         loop = queue_tail = NULL;

-      else
+      else {

         loop->next = tmp->next;
         loop->next = tmp->next;

+        if ( tmp == queue_tail )
+          queue_tail = tmp->next;
+      }

       g_free ( tmp );
       tmp = NULL;
     }
       g_free ( tmp );
       tmp = NULL;
     }


@@ -164,8 +198,31 @@ void a_mapcache_remove_all_shrinkfactors ( guint16 x, guint16 y, guint16 z, guin
   } while ( loop && (loop != queue_tail || tmp == NULL) );
 
   /* loop thru list, looking for the one, compare first whatever chars */
   } while ( loop && (loop != queue_tail || tmp == NULL) );
 
   /* loop thru list, looking for the one, compare first whatever chars */

+  cache_remove(key);
+  g_mutex_unlock(mc_mutex);
+}
+
+void a_mapcache_flush ()
+{
+  List *loop = queue_tail;
+  List *tmp;
+
+  if ( queue_tail == NULL )
+    return;
+
+  g_mutex_lock(mc_mutex);
+  do {
+    tmp = loop->next;
+    cache_remove(tmp->key);
+    if ( tmp == queue_tail ) /* we deleted the last thing in the queue */
+      loop = queue_tail = NULL;
+    else
+      loop->next = tmp->next;
+    g_free ( tmp );
+    tmp = NULL;
+  } while ( loop );

 
 

-  g_hash_table_remove ( cache, key );
+  g_mutex_unlock(mc_mutex);

 }
 
 void a_mapcache_uninit ()
 }
 
 void a_mapcache_uninit ()