303584 - SVG Gradients not displayed in standalone doc

Status: RESOLVED FIXED

(Core :: SVG, defect)

Description

[Jeff Schiller]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8b4) Gecko/20050728 Firefox/1.0+
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8b4) Gecko/20050728 Firefox/1.0+

If you view http://www.codedread.com/svghead.svg there is no gradient.  However,
if you view it as an embedded object (http://www.codedread.com/) the gradient is
properly displayed.

This seems to be a newer problem as I believe it used to work fine.

Reproducible: Always

Steps to Reproduce:
1.
2.
3.

Comment 1

[Holger Will]

this applies only to text elements, and only if gradientUnits="objectBoundingBox"
is used, which unfortunatly is the default. this might be connected to the fact
that getBBox is not implemented for text elements. you could rewrite the
gradient to use gradientUnits="userSpaceOnUse" as a workaround.

Comment 2

[Holger Will]

oh sorry for my ignorance, getBBox is implemented for text elements, it just
does not work on load.
the problem might still be connected to this.

Comment 3

[Jonathan Watt [:jwatt]]

Confirming. This has something to do with nsSVGLength::AxisLength not being able
to get the user unit length for percentage lengths.

http://lxr.mozilla.org/seamonkey/source/content/svg/content/src/nsSVGLength.cpp#556

If the user unit length can't be calculated we return 1.0f, so I think the
gradient is being drawn, it's just being drawn in a 1px height and width box
(perhaps outside the area we clip to). If you change the height and width on the
'svg' element to absolute units then the gradient works.

Comment 4

[Jeff Schiller]

Actually I just fiddled with this a little more.  Go to
http://www.codedread.com/svghead.svg and make the browser very wide
(x-direction) but very short (y-direction) and you'll see the gradient shows up
starting from the lower-right corner.  So it seems that the heighth and width of
the SVG document are maybe improperly calculated?

Comment 5

[Chris Ruvolo]

I'm getting something similar.  I've got a SVG with radial gradients.  The gradients for irregular regions with 1pt outline strokes are rendered as solid colors.  There are small rectangular boxes with a radial gradient that is rendered properly.  Can anyone confirm that this is the same problem?  I'm seeing this on Linux and Windows in FF 1.5rc  Thanks.

SVG: http://upload.wikimedia.org/wikipedia/commons/e/e1/NJ_109th_congressional_districts_shaded_by_party.svg

As rendered by Inkscape:
http://en.wikipedia.org/wiki/Image:NJ_109th_congressional_districts_shaded_by_party.png

Comment 6

[tor]

Attachment: reduced testcase - should show centered green gradient

Comment 7

[tor]

Attachment: working testcase - reduced viewbox in previous by 10x

Looks like the traditional cairo range problem in another guise.

Comment 8

[Robert Longson [:longsonr]]

It looks like Firefox 3 will be 24.8. i.e. it will have a coordinate range of
±33,554,432. The nightlies have this range now.

The testcases in this bug now work

fixed by check in for bug 384681