296411 - SVG radial gradients with repeat or reflect spreadMethod tile

Status: RESOLVED WONTFIX

(Core :: SVG, defect)

Description

[chris]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8b2) Gecko/20050527 Firefox/1.0+
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8b2) Gecko/20050527 Firefox/1.0+

In the SVG component, radial gradients that use spreadMethod="repeat" or
spreadMethod="reflect" are incorrect. The gradient is tiled, giving the effect
of a grid of circular gradients, rather than repeating or reflecting the
gradient stops, which would give the effect of concentric circles.

Reproducible: Always

Steps to Reproduce:
1. display the test file
2. look


Actual Results:  
incorrect rendering compared to reference image

Expected Results:  
same rendering as reference image

Comment 1

[chris]

Attachment: svg testcase

Comment 2

[chris]

Attachment: reference image

this is the correct rendering

Comment 3

[tor]

Works fine with cairo, broken with gdi+.

Comment 4

[chris]

Attachment: Firefox deerpark alpha1 rendering

incorrect rendering

Comment 5

[tor]

GDI+'s WrapMode doesn't do what one might first expect on PathGradientBrushes. 
It doesn't seem as though GDI+ has the capability to do the SVG spreadMethods
natively, so likely this bug will not be fixed until we switch to cairo on
MS-Windows (probably a year or so from now).

Comment 6

[Gervase Markham [:gerv]]

This is an automated message, with ID "auto-resolve01".

This bug has had no comments for a long time. Statistically, we have found that
bug reports that have not been confirmed by a second user after three months are
highly unlikely to be the source of a fix to the code.

While your input is very important to us, our resources are limited and so we
are asking for your help in focussing our efforts. If you can still reproduce
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Comment 7

[chris]

auto-resolving all bugs no-one cares about, huh?

in this particular case though I can confirm that it works correctly with a
cairo-based backend, its solely the GDI+ backen version that is affected.

Comment 8

[Jonathan Watt [:jwatt]]

Marking wontfix. We have no plans to continue work on the GDI+ backend.

Comment 9

[chris]

I'm happy to see this closed, since it works in the Cairo backend and Firefox has now moved to the Cairo backend, so the fact that this didn't work in the GDI+ is just historical. 

Comment 10

[[e-mail]]

Looks like this problem is still with us in 2012 - FF 10.0.2

Sure it maybe a little used function - but it is still not implemented

Fails:

http://www.w3.org/Graphics/SVG/Test/20061213/svg/pservers-grad-14-b.svg 
http://www.w3.org/Graphics/SVG/Test/20110816/harness/htmlObjectApproved/pservers-grad-14-b.html

Comment 11

[Robert Longson [:longsonr]]

This works perfectly fine for me. An old GDI+ bug is probably not the place for this though. If you have an issue please open a new bug and attach a screenshot.