stroke to path on round cap strokes gives defective results

[csigafi]

Inkscape Inkscape 0.91 r13725 (Windows 7 Home Premium 64-bit version 6.1 Build 7601. Service Pack 1)

This affects only round cap strokes if a "stroke to path" conversion applied on it. (My sample stroke is 10px width.)

The squarish look (marked with red arrows) seems just a visualization glitch for me as the outline view smooth and it's difference with other object also gives a smooth result.

But the main problem for me that the "stroke to path" conversion still not gives the exact shape as a result compared to the original stroke. (See the original stroke under the converted path.)

[csigafi (csigafi)]

Screenshot added.

[Liam P. White (liampwhite)]

Are you referring to the red outline not matching the filled area?

[csigafi (csigafi)]

Also, but the main thing is: the converted object's shape doesn't match with the original.

[Alvin Penner (apenner)]

probably related to Bug 1680179

[Alvin Penner (apenner)]

I believe this has been fixed in rev 15626
http://bazaar.launchpad.net/~inkscape.dev/inkscape/trunk/revision/15626

could you re-test with current trunk?

[csigafi (csigafi)]

To be honest I have no idea how to install this "trunk" thing to Win10. :)
But I retested with Inkscape 0.92.0 r15299, and the bug still exists.

[Alvin Penner (apenner)]

yes, you would have to either compile Inkscape yourself in order to test the change, or wait for a pre-compiled version to be posted. There are fairly recent versions posted at:

http://download.tuxfamily.org/inkscape/win64/

At this site, the most recent version is rev 15615, so you would need to wait for something newer than rev 15626 to be posted.

[csigafi (csigafi)]

Thanks for the info. This compile thing is too complicated for me so I better wait for a new version. :)

[Christoph Ra (chraab)]

To my layman's ears this sounds like a precision problem, similar to the one reported in https://bugs.launchpad.net/inkscape/+bug/1416983. I see this same problem in 0.92.2, with the extreme case being that rounded caps simply vanish at small sizes. Could someone clarify that the bug fix of rev 15626 addresses this? (I tried checking myself by compiling the current trunk, but it wouldn't - will have to go back and try to find a revision that compiles for me.)

[Alvin Penner (apenner)]

The bug report Bug 1680179 has been fixed in trunk.
https://bugs.launchpad.net/inkscape/+bug/1680179

Up to date, compiled versions of trunk are available at:
https://ci.appveyor.com/project/inkscape/inkscape/history
these builds are available as 7z files which can be decrunched and run without the need to compile. Instructions are at:
http://inkscape.13.x6.nabble.com/Daily-Inkscape-Builds-td4981283.html

I've tested Bug 1680179 to confirm it is still present in the 0.92.x branch
Inkscape 0.92.2 (4c1f5bf, 2017-12-22)
but is not present in trunk
Inkscape 0.92+devel (0beb22f, 2017-12-29)
both of which came from the Appveyor site

[Christoph Ra (chraab)]

Hi Alvin, thank you so much for putting in that work to test!

[Alvin Penner (apenner)]

so, have you been able to confirm that the bug is fixed?