incorrect filter effects region

[sas]

The attached SVG file (moon.svg) is rendered incorrectly in Inkscape (SVN revision 18586): the blur is clipped to the bounding box of the crescent. It's as if Inkscape assumes filterUnits="objectBoundingBox" even though the file specifies filterUnits="userSpaceOnUse".

(I also see strange banding at some zoom levels. This may be related to bug 181995, and in any case is not the subject of the current bug report.)

[sas (sas-sas)]

Here is what the image should look like (as rendered by Batik).

[sas (sas-sas)]

Here is how Inkscape renders it.

[jazzynico (jazzynico)]

Confirmed on Ubuntu 9.04, Inkscape rev. 21460.
Not only the filter is not displayed as it should, but it's incorrectly exported to PNG and PDF (not tested with other formats). The SVG file looks good when opened with Firefox 3.0.10.

[su_v (suv-lp)]

@Jimmy - I think the region (resulting visual bbox) of the filter effect is meant, not the region affected by the filter. ;-)

[Jaspervdg (jaspervdg)]

Partially fixed now, Inkscape will respect the userSpaceOnUse value but computes percentages w.r.t. the bounding box of the object. The specification is a little unclear about this, but it would probably be better to use the viewport dimensions (in the local user coordinates) as reference (I think Batik also does this). This is slightly odd when transformations are used (for example, Batik also renders this image with a clipped blur at the top, because of the translation used on the path), but it would correspond to the behaviour of a rect with x/y/width/height in percentages for example.

[theAdib (theadib)]

the attached image shows a regression in filters.

[Tavmjong Bah (tavmjong-free)]

Fixed in r12073.

Note, fix only works for viewport from root SVG element.

[Jonathan Hofinger (jhofinger)]

No longer reproduced in current master; closing as part of Inkscape's bug migration.

Closed by: https://gitlab.com/jhofinger