Hi,<br><br>I think I&#39;ll be a little bit off topic but I don&#39;t know where to ask (my question about svg on inkscapeforum are left unanswered)<br><br>Can someone point me to reference papers (or friendly forum) about coefficients in FeColorMatrix, Fecomposite ?<br>
Something that could answer the following questions :<br><br>What are safe values ? For exemple inkscape UI allows x10 for k1,k2,k3,k4 in FeComposite, can I push to 255 ? 256 ? 1000000 ? <br>I don&#39;t see anything in SVG spec about max values for those coeffs.<br>
<br>What about neg values ? When does clipping occur ? Particularly for k4.<br><br>What is the effect of a &lt;100% opacity source or dest ? (On clipping for exemple) <br><br>I try to port svg2 PorterDuff operations in svg 1 and I often get strange results (to me) with inkscape. Is there some known bugs in rendering fecomposite with neg values in inkscape ?<br>
<br>Thx.<br><br>V.<br><br>Bonus question : why is inkscape so slow at rendering filters ? ;)<br>