829325 - Common points in SVG polygon and polyline do not coincide

Status: VERIFIED WORKSFORME

(Core :: Graphics, defect)

Description

[Duncan Loveday]

Attachment: BPTMDiagram.svg

User Agent: Mozilla/5.0 (Windows NT 6.1; rv:20.0) Gecko/20130105 Firefox/20.0
Build ID: 20130105030839

Steps to reproduce:

Load this test SVG. note the point (300,200) in present in both the polygon and polyline.

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg xmlns="http://www.w3.org/2000/svg">
<polygon points="200,200 300,200" fill="none" stroke="#00ff00" stroke-width="20px"/>
<polyline points="300,100 300,200" fill="none" stroke="#ff0000" stroke-width="20px"/>
</svg>




Actual results:

In the resulting image the polygon and polyline do not meet in the corner.


Expected results:

In the resulting image the polygon and polyline should meet in the corner.

Comment 1

[Duncan Loveday]

Same behaviour in Fx 17.0.1 and a recent nightly.

Displayed as expected in IE9 and earlier versions of Firefox.

Comment 2

[Robert Longson [:longsonr]]

Could you get a regression range please Duncan?

https://quality.mozilla.org/docs/bugzilla/guide-to-triaging-bugs-for-firefox/finding-a-regression-window/

type about:buildconfig in the address bar in the last good and subsequent first bad build and post the Built from link please.

or alternatively and perhaps more simply:

http://mozilla.github.com/mozregression/ is a handy tool that automates the regression-finding process (and prints out a link at the end, with the last-good and first-bad changesets built in).

Comment 3

[Duncan Loveday]

Also looks correct in chrome and opera.

Yes I'll try to get the range.

Comment 4

[Duncan Loveday]

Last good build (downloaded from http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/2012/05/2012-05-22-14-50-33-mozilla-central/firefox-15.0a1.en-US.win32.zip)

        => Built from http://hg.mozilla.org/mozilla-central/rev/b038090f07c2

First bad build (downloaded from http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/2012/05/2012-05-23-14-33-59-mozilla-central/firefox-15.0a1.en-US.win32.zip)

        => Built from http://hg.mozilla.org/mozilla-central/rev/e912c25c141f

Comment 5

[Loic]

Likely Azure-Thebes bug, not SVG. Disabling HWA fixes the issue.

m-c
good=2012-05-23
bad=2012-05-24
http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=36e938e51481&tochange=f43e8d300f21

Suspected bug:
Bas Schouten — Bug 715768: Enable Azure-Thebes wrapper by default for D2D. r=jrmuizel

Comment 6

[Loic]

Attachment: screenshot FF21 Win 7

Anyway I got various results with HWA/Azure on/off, see my screenshot.

Comment 7

[Duncan Loveday]

Bottom left matches what I see in IE9, opera, chrome

Comment 8

[Duncan Loveday]

Possibly worth mentioning that it is the polygon that looks wrong. It seems to overshoot at *both ends*. Two polylines look right; two polygons cross; a polygon and a polyline make a T shape.

Comment 9

[Boris Zbarsky [:bzbarsky]]

Bottom left of that screenshot is what I see on Mac, fwiw.

Comment 10

[Duncan Loveday]

Can I work around this in any way by changing my web app code ?

Comment 11

[Virtual_ManPL [:Virtual] 🇵🇱 - (please needinfo? me - so I will see your comment/reply/question/etc.)]

Can you still reproduce the issue with latest version with clean new fresh profile without any addons and plugins?

Comment 12

[Duncan Loveday]

I'm seeing "bottom left" of the second attachment now using a nightly for 38.0a1 (2015-01-17) (Built from https://hg.mozilla.org/mozilla-central/rev/369a8f14ccf8). That's probably correct as the mid points of the two lines coincide.

Comment 13

[Duncan Loveday]

Chrome, Opera, IE10, Safari and Firefox all show the "bottom left" version. Happy days.

Comment 14

[Virtual_ManPL [:Virtual] 🇵🇱 - (please needinfo? me - so I will see your comment/reply/question/etc.)]

Thank you very much for checking.
If it's fixed or it looks so, I'm closing this bug as WORKSFORME.