X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-core%2Ftrunk%2Fsrc%2Fsynfig%2Flayer.h;h=a9952990f7f6497dccd320578cd1753a1852d339;hb=29d94ccd0730e4c4f3287438910ef1bea4c89ba3;hp=fa7b3b76854e3fbfcf5782a160c230958cc2c70b;hpb=791af4d0deaf3da6360107ffee4cde1862a3d8c1;p=synfig.git

diff --git a/synfig-core/trunk/src/synfig/layer.h b/synfig-core/trunk/src/synfig/layer.h
index fa7b3b7..a995299 100644
--- a/synfig-core/trunk/src/synfig/layer.h
+++ b/synfig-core/trunk/src/synfig/layer.h
@@ -428,6 +428,14 @@ public:
 	//! Duplicates the Layer
 	virtual Handle clone(const GUID& deriv_guid=GUID())const;
 
+	//! Returns true if the layer needs to be able to examine its context.
+	/*! context to render itself, other than for simple blending.  For
+	**  example, the blur layer will return true - it can't do its job
+	**  if it can't see its context, and the circle layer will return
+	**  false - rendering a circle doesn't depend on the underlying
+	**  context until the final blend operation. */
+	virtual bool reads_context()const;
+
 #ifdef THIS_CODE_IS_NOT_USED
 	//! Duplicates the Layer without duplicating the value nodes
 	virtual Layer *simple_clone()const;