Convert terrasync into a subsystem.

Fixed scenery tile refresh method.
Simgear automake makefiles with libsvn detection.
Simgear CMake support for libsvn (may not work :) )

CMakeLists.txt

@@ -20,6 +20,8 @@ set(CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/CMakeModules;${CMAKE_MODULE_PATH}")
 option(SIMGEAR_SHARED "Set to ON to build SimGear as a shared library/framework" OFF)
 option(SIMGEAR_HEADLESS "Set to ON to build SimGear with GUI/graphics support" OFF)
 option(JPEG_FACTORY "Enable JPEG-factory support" OFF)
+option(ENABLE_LIBSVN "Set to ON to build SimGear with libsvnclient support" OFF)
+
 set(MSVC_3RDPARTY_ROOT NOT_FOUND CACHE PATH "Location where the third-party dependencies are extracted")
 
 if (MSVC AND MSVC_3RDPARTY_ROOT)
@@ -67,6 +69,16 @@ if(JPEG_FACTORY)
     include_directories(${JPEG_INCLUDE_DIR})
 endif()
 
+if(ENABLE_LIBSVN)
+	find_package(SvnClient)
+	
+	if(LIBSVN_FOUND)
+		message(STATUS "libsvn found, enabling in SimGear")
+		set(HAVE_SVN_CLIENT_H 1)
+		set(HAVE_LIBSVN_CLIENT_1 1)
+	endif(LIBSVN_FOUND)
+endif(ENABLE_LIBSVN)
+
 check_include_file(sys/time.h HAVE_SYS_TIME_H)
 check_include_file(sys/timeb.h HAVE_SYS_TIMEB_H)
 check_include_file(unistd.h HAVE_UNISTD_H)

configure.ac

@@ -540,6 +540,39 @@ if test "x$ac_cv_header_zlib_h" != "xyes"; then
     echo
 fi
 
+dnl Check for Subversion library support
+# libsvn support defaults to yes
+save_LIBS=$LIBS
+save_CPPFLAGS=$CPPFLAGS
+AC_ARG_WITH(libsvn, [  --without-libsvn        Do not use built-in subversion (libsvn) for simgear [default=no]], [], [with_libsvn=yes])
+if test "x$with_libsvn" = "xyes"; then
+    LIBS="`apr-1-config --link-ld`"
+    CPPFLAGS="-I/usr/include/subversion-1 `apr-1-config --includes --cppflags`"
+    AC_CHECK_HEADERS([svn_client.h])
+       if test "x$ac_cv_header_svn_client_h" = "xyes"; then
+	echo "Using built-in subversion (libsvn) for scenery downloads."
+	AC_SEARCH_LIBS(svn_client_checkout, svn_client-1,
+	               [AC_DEFINE([HAVE_LIBSVN_CLIENT_1], [1], [Define to 1 if you have libsvn_client-1])],
+	               [AC_MSG_ERROR(svn_client-1 library not found.)],)
+	AC_SEARCH_LIBS(svn_cmdline_init, svn_subr-1, , [AC_MSG_ERROR(svn_subr-1 library not found.)],)
+	AC_SEARCH_LIBS(svn_ra_initialize, svn_ra-1, , [AC_MSG_ERROR(svn_ra-1 library not found.)],)
+	svn_LIBS=$LIBS
+	svn_CPPFLAGS=$CPPFLAGS
+	AC_SUBST(svn_LIBS)
+	AC_SUBST(svn_CPPFLAGS)
+       else
+	echo "Libsvn not found. Will use command line subversion for scenery downloads."
+	svn_LIBS=""
+	svn_CPPFLAGS=""
+       fi
+else
+echo "Libsvn explicitly disabled. Will use command line subversion for scenery downloads."
+  svn_LIBS=""
+  svn_CPPFLAGS=""
+fi
+LIBS=$save_LIBS
+CPPFLAGS=$save_CPPFLAGS
+
 dnl Checks for header files.
 AC_HEADER_STDC
 AC_CHECK_HEADERS( \
@@ -596,6 +629,7 @@ AC_CONFIG_FILES([ \
 	simgear/scene/sky/Makefile \
 	simgear/scene/tgdb/Makefile \
 	simgear/scene/util/Makefile \
+	simgear/scene/tsync/Makefile \
 	simgear/screen/Makefile \
 	simgear/serial/Makefile \
 	simgear/sound/Makefile \

projects/VC90/SimGear.vcproj

@@ -1460,6 +1460,18 @@
 				>
 			</File>
 		</Filter>
+		<Filter
+			Name="Lib_sgtsync"
+			>
+			<File
+				RelativePath="..\..\simgear\scene\tsync\terrasync.cxx"
+				>
+			</File>
+			<File
+				RelativePath="..\..\simgear\scene\tsync\terrasync.hxx"
+				>
+			</File>
+		</Filter>
 		<Filter
 			Name="Lib_sgthread"
 			>

simgear/scene/CMakeLists.txt

@@ -9,6 +9,7 @@ foreach( mylibfolder
         sky
         tgdb
         util
+        tsync
     )
 
     add_subdirectory(${mylibfolder})

simgear/scene/tgdb/TileCache.cxx

@@ -192,13 +192,8 @@ void TileCache::refresh_tile(long tile_index)
 
     SG_LOG( SG_TERRAIN, SG_DEBUG, "REFRESHING CACHE ENTRY = " << tile_index );
 
-    TileEntry* e = NULL;
+    if (it->second)
-    if (!it->second->is_expired(current_time))
+        it->second->refresh();
-        e = new TileEntry(it->second);
-
-    entry_free(tile_index);
-    if (e)
-        tile_cache[tile_index] = e;
 }
 
 // update tile's priority and expiry time according to current request
@@ -207,7 +202,7 @@ void TileCache::request_tile(TileEntry* t,float priority,bool current_view,doubl
     if ((!current_view)&&(request_time<=0.0))
         return;
 
-    // update priority when hire - or old has expired
+    // update priority when higher - or old request has expired
     if ((t->is_expired(current_time))||
          (priority > t->get_priority()))
     {

simgear/scene/tgdb/TileEntry.cxx

@@ -415,3 +415,20 @@ TileEntry::removeFromSceneGraph()
         }
     }
 }
+
+void
+TileEntry::refresh()
+{
+    osg::Group *parent = NULL;
+    // find the nodes branch parent
+    if ( _node->getNumParents() > 0 ) {
+        // find the first parent (should only be one)
+        parent = _node->getParent( 0 ) ;
+        if( parent ) {
+            parent->removeChild( _node.get() );
+        }
+    }
+    _node = new osg::LOD;
+    if (parent)
+        parent->addChild(_node.get());
+}

simgear/scene/tgdb/TileEntry.hxx

@@ -132,6 +132,10 @@ public:
      */
     void removeFromSceneGraph();
     
+    /**
+     * Refresh a tile, reload the node from disk.
+     */
+    void refresh();
 
     /**
      * return the scenegraph node for the terrain

simgear/scene/tsync/CMakeLists.txt

@@ -0,0 +1,11 @@
+include (SimGearComponent)
+
+set(HEADERS
+    terrasync.hxx
+    )
+
+set(SOURCES 
+    terrasync.cxx
+    )
+
+simgear_component(tsync scene/tsync "${SOURCES}" "${HEADERS}")

simgear/scene/tsync/Makefile.am

@@ -0,0 +1,15 @@
+includedir = @includedir@/scene/tsync
+
+AM_CPPFLAGS = $(svn_CPPFLAGS)
+
+lib_LIBRARIES = libsgtsync.a
+
+noinst_HEADERS =
+
+include_HEADERS = \
+	terrasync.hxx
+
+libsgtsync_a_SOURCES = \
+	terrasync.cxx
+
+INCLUDES = -I$(top_srcdir)