Bug in filter coordinates system

[Hadmut Danisch]

Hi,

fetch http://upload.wikimedia.org/wikibooks/de/7/72/SVG_Buch01.svg (which renders well with rsvg) and try to render it with inkscape. The result is an empty canvas.

I have tracked this down to that I have to replace

<filter id="LichtUndSchatten" filterUnits="userSpaceOnUse" x="0" y="150" width="1000" height="700">

with

<filter id="LichtUndSchatten" filterUnits="objectBoundingBox" x="-50%" y="-50%" width="200%" height="200%">

to get inkscape create something visible.

(however, there's still something wrong with the specular shading. There was a bad change in inkscape some versions ago after which I had to update all my svg scripts and increase specularConstant from 0.5 to 0.9. Compare the output of rsvg with the output of inkscape from this particular svg file. )
[ modified 'specularConstant' rendering between 0.46 and 0.47 had reported as Bug #484507 “Filtering broken” ]

[su_v (suv-lp)]

reproduced with Inkscape 0.48pre1 on OS X 10.5.8, compared to Squiggle (Batik 1.7)

Possibly related:
Bug #229246 “incorrect filter effects region”:
<https://bugs.launchpad.net/inkscape/+bug/229246>

[Tavmjong Bah (tavmjong-free)]

A new W3C test has been created that could be useful in debugging filter coordinate problems.

http://dev.w3.org/SVG/profiles/1.1F2/test/svg/filters-image-03-f.svg

[su_v (suv-lp)]

No longer reproduced with current trunk (see attached bitmap export done with Inkscape 0.48+devel r12185).