vipsobject fallback for new_from_string() as well

TODO

@@ -1,28 +1,12 @@
-- interpolate needs stuff for new new_from_string etc. system
+- also VipsFormat ... could this replace vips_image_new_from_string()? or
-
-  also VipsFormat ... could this replace vips_image_new_from_string()? or
   could we call this from vips_image_new_from_string()? 
 
-  vipsobject should have a fall-back implementation that does something, I
-  don't quite know what
 
 
 
 
 
-
+- use this system to do file format options, eg.
-- vips_object_new_from_string() must go, use the vfunc thing instead
-
-  at the moment, vips_object_new_from_string() is used for
-
-  	affinei bilinear{arg=12}
-
-  instead, have a new_from_string vfunc on interpolate which takes off the
-  main part of the arg and uses that to look up the interpolate subclass
-
-  parsing off required and optional sub-args could be moved somewhere else
-
-  use this system to do file format options, eg.
 
   	vips copy fred.v fred.jpg{quality=90}
 
@@ -37,6 +21,9 @@
 - perhaps we should have hard refs everywhere? it's very confusing having a
   mxture :-( use vips_object_local() to make hard refs autounref
 
+  what would the API look like?
+
+
 
 
 - try out:

libvips/iofuncs/object.c

@@ -874,6 +874,29 @@ vips_object_real_rewind( VipsObject *object )
 	object->postclose = FALSE;
 }
 
+static VipsObject *
+vips_object_real_new_from_string( const char *string )
+{
+	GType type;
+
+	/* The main arg selects the subclass.
+	 */
+	if( !(type = vips_type_find( "VipsObject", string )) )
+		return( NULL );
+
+	return( VIPS_OBJECT( g_object_new( type, NULL ) ) );
+}
+
+static void 
+vips_object_real_to_string( VipsObject *object, VipsBuf *buf )
+{
+	VipsObjectClass *class = VIPS_OBJECT_GET_CLASS( object );
+
+	/* Just "bicubic" or whatever.
+	 */
+	vips_buf_appends( buf, class->nickname );
+}
+
 static void
 transform_string_double( const GValue *src_value, GValue *dest_value )
 {
@@ -904,6 +927,8 @@ vips_object_class_init( VipsObjectClass *class )
 	class->print = vips_object_real_print;
 	class->sanity = vips_object_real_sanity;
 	class->rewind = vips_object_real_rewind;
+	class->new_from_string = vips_object_real_new_from_string;
+	class->to_string = vips_object_real_to_string;
 	class->nickname = "object";
 	class->description = _( "VIPS base class" );
 

libvips/resample/interpolate.c

@@ -167,43 +167,17 @@ vips_interpolate_real_get_window_offset( VipsInterpolate *interpolate )
 	}
 }
 
-static VipsObject * 
-vips_interpolate_new_from_string( const char *string )
-{
-	GType type;
-
-	/* The main arg selects the subclass.
-	 */
-	if( !(type = vips_type_find( "VipsInterpolate", string )) )
-		return( NULL );
-	return( VIPS_OBJECT( g_object_new( type, NULL ) ) );
-}
-
-static void 
-vips_interpolate_to_string( VipsObject *object, VipsBuf *buf )
-{
-	VipsObjectClass *class = VIPS_OBJECT_GET_CLASS( object );
-
-	/* Just "bicubic" or whatever.
-	 */
-	vips_buf_appends( buf, class->nickname );
-}
-
 static void
 vips_interpolate_class_init( VipsInterpolateClass *class )
 {
 #ifdef DEBUG
 	GObjectClass *gobject_class = G_OBJECT_CLASS( class );
 #endif /*DEBUG*/
-	VipsObjectClass *vobject_class = VIPS_OBJECT_CLASS( class );
 
 #ifdef DEBUG
 	gobject_class->finalize = vips_interpolate_finalize;
 #endif /*DEBUG*/
 
-	vobject_class->new_from_string = vips_interpolate_new_from_string;
-	vobject_class->to_string = vips_interpolate_to_string;
-
 	class->interpolate = NULL;
 	class->get_window_size = vips_interpolate_real_get_window_size;
 	class->get_window_offset = vips_interpolate_real_get_window_offset;