feImage filter not updating filtered region when referenced object changes

[Felipe "Juca" Sanches]

The feature was introduced in revision 17484
http://inkscape.svn.sourceforge.net/viewvc/inkscape?view=rev&revision=17484

It renders ok, but when you edit the referenced object, the filtered object does not get updated. It is only updated when you indirectly induce an update. (i.e. by manipulating it).

steps to reproduce:

* create a star
* create a square
* open filter effects dialog
* create a new filter
* add an Image filter primitive
* select the star
* click on "Selected SVG Element"
* select the square
* apply the filter to the square

You will see that the filter correctly renders the star in the square object.

* edit the star

you wont see the filtered object change until you induce a render update.

* drag the filtered object to update it on canvas.

There must be a way to invoke the renderer on the filtered object when the referenced object is edited.

[Felipe "Juca" Sanches (felipe-sanches)]

This patch is intended to fix this bug. My doubt is how to update the filtered object display.

I tried to use obj->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); but it seems to not work.

[Niko Kiirala (kiirala)]

Mon, 25 Feb 2008 08:27:23 -0000
"Felipe \"Juca\" Sanches" <email address hidden> kirjoitti:

> This patch is intended to fix this bug. My doubt is how to update the
> filtered object display.
>
> I tried to use obj->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
> but it seems to not work.

The rest of filter primitives use
filter_primitive->parent->requestModified(SP_OBJECT_MODIFIED_FLAG);
I believe, it would work here, too.

(that is, a filter primitive requests update for it's parent element,
which should be svg:filter, which results in all styles using that
filter to receive the modified signal)