Bug 216686

Summary:	Lines in SVG images mishandled
Product:	[Applications] konqueror	Reporter:	Dave Farrance <dave.tmp2>
Component:	general	Assignee:	Konqueror Bugs <konqueror-bugs-null>
Status:	RESOLVED WORKSFORME
Severity:	normal	CC:	maksim, martin
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Mandriva RPMs
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Dave Farrance 2009-11-29 17:46:26 UTC

Version:            (using KDE 4.3.2)
OS:                Linux
Installed from:    Mandriva RPMs

Konqueror does not show lines in valid SVG image files, such as those created by line-drawing in Inkscape.

Take this example. It's an SVG image file with two parallel lines, one red and one blue, across a green background:

<svg xmlns="http://www.w3.org/2000/svg" width="100" height="60">
  <g>
    <rect width="60" height="60" x="20" y="0" fill="yellowgreen" />
    <path d="m 0 40 100 0" stroke="red" stroke-width="10" />
    <path d="m 0 20 l 100 0" stroke="blue" stroke-width="10" />
  </g>
</svg>

Konqueror fails to show the red line. That's because it seems to require that the lower-case-L "lineto" be put in explicitly, as is done with the blue line, but instead it's treating the second pair of coordinates as if they were a repetition of the lower-case-M "moveto" command, and thus no line is shown.  However, the last line in section 8.3.2 of the SVG spec says: "If a moveto is followed by multiple pairs of coordinates, the subsequent pairs are treated as implicit lineto commands", therefore the line should have been shown.

The SVG spec:
http://www.w3.org/TR/SVG/paths.html#PathDataMovetoCommands

My SVG example:
http://anvil.pwp.blueyonder.co.uk/images/test1.svg

How it looks, incorrectly, in Konqueror:
http://anvil.pwp.blueyonder.co.uk/images/test1kn.png

How it looks, correctly, in Firefox and others:
http://anvil.pwp.blueyonder.co.uk/images/test1ff.png

Comment 1 Maksim Orlovich 2009-11-29 18:06:23 UTC

Thanks for the great report... but your testcase actually passes for me, on 4.3.3.

Comment 2 Dave Farrance 2009-11-29 18:25:05 UTC

After posting that, I see that Konqueror renders it OK in web-browser mode, but not in file-manager mode. Try downloading the test case onto hard drive, then view it there with Konqueror.

http://anvil.pwp.blueyonder.co.uk/images/test1.svg

Comment 3 Maksim Orlovich 2009-11-29 18:35:48 UTC

Works fine either way for me; could you perhaps check the viewer in use under view -> view mode?

Comment 4 Dave Farrance 2009-11-29 18:42:13 UTC

This renders it incorrectly:
  view -> view mode -> Svg  Part

This renders it correctly:
  view -> view mode -> KHTML

Comment 5 Maksim Orlovich 2009-12-02 13:14:11 UTC

The SVG part is Qt's builtin SVG viewer... I guess I will need to test whether it's still broken in Qt4.6.0....

Comment 6 Martin Koller 2011-07-03 18:49:58 UTC

Works with KDE 4.6.4 and Qt 4.7.3