When dragging an object, objects behind him are erased

[Jan Flaška]

When dragging an object in Inkscape 0.92 and later, it often happens that all objects behind the one being dragged are erased by a white rectangle size of the bounding box. I noticed the bug on Windows 8 and 10 and all versions of Inkscape 0.92 on a variety computers (DELL, Lenovo, HP, ASUS...). The bug is not dependent on the graphics card, it occurs on a variety of Intel gfx cards and on nVidia cards alike. The bug appears regardless to whether the objects are transparent or blurred.

When zooming in / out of the picture, the missing parts are redrawn again.

Besides the above said, I noticed that rendering the image during drawing is notably slower in 0.92 than in 0.91. I use Inkscape to teach my students vector graphics, but for the time being, I need to keep the old version.

[Alvin Penner (apenner)]

could you attach the corresponding svg file?

[Jan Flaška (jan-flaska)]

Hello,

sure, here it is. This is not an exception, though - the bug occurs in
various files and if you wish, I can send you more.

I'm not sure if I said that the bug isn't present in Inkscape 0.91 so it
must be something with the new rendering engine (or whatever :-))

BTW I just realized that by using "him", referring to the object in the
subject of the message, I demonstrated a surprising level of grammatical
stupidity :-)

All my best and thank you for your work on Inkscape,

Jan Flaska

---------- Původní e-mail ----------
Od: Alvin Penner <email address hidden>
Komu: <email address hidden>
Datum: 23. 1. 2019 18:00:59
Předmět: [Bug 1813023] Re: When dragging an object, objects behind him are
erased
"could you attach the corresponding svg file?

--
You received this bug notification because you are subscribed to the bug
report.
https://bugs.launchpad.net/bugs/1813023

Title:
When dragging an object, objects behind him are erased

Status in Inkscape:
New

Bug description:
When dragging an object in Inkscape 0.92 and later, it often happens
that all objects behind the one being dragged are erased by a white
rectangle size of the bounding box. I noticed the bug on Windows 8 and
10 and all versions of Inkscape 0.92 on a variety computers (DELL,
Lenovo, HP, ASUS...). The bug is not dependent on the graphics card,
it occurs on a variety of Intel gfx cards and on nVidia cards alike.
The bug appears regardless to whether the objects are transparent or
blurred.

When zooming in / out of the picture, the missing parts are redrawn
again.

Besides the above said, I noticed that rendering the image during
drawing is notably slower in 0.92 than in 0.91. I use Inkscape to
teach my students vector graphics, but for the time being, I need to
keep the old version.

To manage notifications about this bug go to:
https://bugs.launchpad.net/inkscape/+bug/1813023/+subscriptions
"

[Alvin Penner (apenner)]

thanks for the file.
I was not able to reproduce the problem on Windows 10, Inkscape 0.92.4 (5da689c313, 2019-01-14).

I tried dragging various objects. In particular I dragged the object 'path4274-9-6-8' which appeared to be similar to your screenshot.

could you indicate which version of Inkscape (Help->About)

[Jan Flaška (jan-flaska)]

---------- Původní e-mail ----------
Od: Alvin Penner <email address hidden>
Komu: <email address hidden>
Datum: 24. 1. 2019 15:10:50
Předmět: [Bug 1813023] Re: When dragging an object, objects behind him are
erased
"thanks for the file.
I was not able to reproduce the problem on Windows 10, Inkscape 0.92.4 (5da
689c313, 2019-01-14).

I tried dragging various objects. In particular I dragged the object
'path4274-9-6-8' which appeared to be similar to your screenshot.
"

Yes, the object in question was path4274-9-6-8-5, a blurred ellipse. But the
bug is exactly the same with path4309 (the grey-black curve connecting the
base of the lamp with the lampshade) as well as number of other objects
which I'm just too lazy to list.

"could you indicate which version of Inkscape (Help->About) "

I tried all versions starting with 0.92.1 and every now and then I updated
Inkscape to a new version to see whether the bug is gone, but it's been
there ever since 0.92 which I downloaded the day it came out... The
screenshot is from a version that I downloaded from the Inkscape site
yesterday.

I uninstalled it already, seeing that the bug hasn't gone, replacing
Inkscape with v0.91.

It might seem like a very silly idea, but can it be somehow connected to the
Czech version of Inkscape and/or Windows?

It's really strange, because since 0.92 the bug has been consistent across
platforms, computers, Inkscape subversions, Windows versions, drawings and
users...

Best,

Jan

[Jan Flaška (jan-flaska)]

Hello again,

I was teaching my students to combine objects - while in 0.91 everything
worked fine, this is what it looked like in 0.92:

https://we.tl/t-4FuxDORnkv(https://we.tl/t-4FuxDORnkv)

There is a single object on the canvas, created by blending other objects
(two basic rectangles, one three-point star, one skewed rectangle). The
system in Windows 10 EDU Czech, Inkscape v 0.92.2.

I am not sure whether this behaviour is somehow connected to the bug I
reported previously or whether it has already been addressed in later
versions of Inkscape.

Best,

Jan

---------- Původní e-mail ----------
Od: Alvin Penner <email address hidden>
Komu: <email address hidden>
Datum: 24. 1. 2019 15:10:50
Předmět: [Bug 1813023] Re: When dragging an object, objects behind him are
erased
"thanks for the file.
I was not able to reproduce the problem on Windows 10, Inkscape 0.92.4 (5da
689c313, 2019-01-14).

I tried dragging various objects. In particular I dragged the object
'path4274-9-6-8' which appeared to be similar to your screenshot.

could you indicate which version of Inkscape (Help->About)

--
You received this bug notification because you are subscribed to the bug
report.
https://bugs.launchpad.net/bugs/1813023

Title:
When dragging an object, objects behind him are erased

Status in Inkscape:
New

Bug description:
When dragging an object in Inkscape 0.92 and later, it often happens
that all objects behind the one being dragged are erased by a white
rectangle size of the bounding box. I noticed the bug on Windows 8 and
10 and all versions of Inkscape 0.92 on a variety computers (DELL,
Lenovo, HP, ASUS...). The bug is not dependent on the graphics card,
it occurs on a variety of Intel gfx cards and on nVidia cards alike.
The bug appears regardless to whether the objects are transparent or
blurred.

When zooming in / out of the picture, the missing parts are redrawn
again.

Besides the above said, I noticed that rendering the image during
drawing is notably slower in 0.92 than in 0.91. I use Inkscape to
teach my students vector graphics, but for the time being, I need to
keep the old version.

To manage notifications about this bug go to:
https://bugs.launchpad.net/inkscape/+bug/1813023/+subscriptions
"

[Jan Flaška (jan-flaska)]

One more thing is probably worth noting: Inkscape (both 0.91 and 0.92) takes
up to 4 minutes to start. We are on LAN, with some network shares, but file
history is clean and number of files to remember in the history is set to
zero.

Best,

Jan

---------- Původní e-mail ----------
Od: Alvin Penner <email address hidden>
Komu: <email address hidden>
Datum: 24. 1. 2019 15:10:50
Předmět: [Bug 1813023] Re: When dragging an object, objects behind him are
erased
"thanks for the file.
I was not able to reproduce the problem on Windows 10, Inkscape 0.92.4 (5da
689c313, 2019-01-14).

I tried dragging various objects. In particular I dragged the object
'path4274-9-6-8' which appeared to be similar to your screenshot.

could you indicate which version of Inkscape (Help->About)

--
You received this bug notification because you are subscribed to the bug
report.
https://bugs.launchpad.net/bugs/1813023

Title:
When dragging an object, objects behind him are erased

Status in Inkscape:
New

Bug description:
When dragging an object in Inkscape 0.92 and later, it often happens
that all objects behind the one being dragged are erased by a white
rectangle size of the bounding box. I noticed the bug on Windows 8 and
10 and all versions of Inkscape 0.92 on a variety computers (DELL,
Lenovo, HP, ASUS...). The bug is not dependent on the graphics card,
it occurs on a variety of Intel gfx cards and on nVidia cards alike.
The bug appears regardless to whether the objects are transparent or
blurred.

When zooming in / out of the picture, the missing parts are redrawn
again.

Besides the above said, I noticed that rendering the image during
drawing is notably slower in 0.92 than in 0.91. I use Inkscape to
teach my students vector graphics, but for the time being, I need to
keep the old version.

To manage notifications about this bug go to:
https://bugs.launchpad.net/inkscape/+bug/1813023/+subscriptions
"

[Alvin Penner (apenner)]

couple of quick comments:
1. comments 6 and 7 appear to represent two new bugs, they should each be reported separately.
2. the link
https://we.tl/t-4FuxDORnkv(https://we.tl/t-4FuxDORnkv)
does not work
3. it is always best to submit an svg file so that we can try to reproduce the problem, if necessary a "before" and an "after" svg file.
4. the new bug tracker location has been relocated to:
https://gitlab.com/inkscape/inbox/issues

[Jan Flaška (jan-flaska)]

OK, here's the link again:

https://we.tl/t-4FuxDORnkv

It's working, I've checked it.

"couple of quick comments:
1. comments 6 and 7 appear to represent two new bugs, they should each be
reported separately. "

Alright. I'm not sure how to describe the bug, though, so I'll probably just
give up reporting it and keep using 0.91 instead.

"3. it is always best to submit an svg file so that we can try to reproduce
the problem, if necessary a "before" and an "after" svg file. "

Yeah, I know, I asked the student to send me the SVG file but he shut
Inkscape down before he saved the file.

"4. the new bug tracker location has been relocated to:
https://gitlab.com/inkscape/inbox/issues
"

OK, thank you.

Jan

[Jan Flaška (jan-flaska)]

Dear Alvin,

it seems you haven't downloaded the files from WeTransfer yet, depicting a
rendering and editing bug in Inkscape 0.92. Unfortunately, I find it too
difficult to describe (even in my mother tongue) to enter the bug into the
bugtracker - please could you have a look at the videos and perhaps analyze
what is happening?

Thank you,

Jan Flaska

[Alvin Penner (apenner)]

the recommended procedure is to submit a separate report for each bug and attach an svg file with instructions as to which operation to perform on the file in order to reproduce the bug.

[Jan Flaška (jan-flaska)]

Yes, I understand that, but, quite obviously, when I did that, you were not
able to reproduce the bug.
Hence I sent a video that shows how the bug looks on our computer. I really
do suspect it to be somehow local-specific, given that it doesn't occur on
EN Windows.

Best,

Jan

---------- Původní e-mail ----------
Od: Alvin Penner <email address hidden>
Komu: <email address hidden>
Datum: 30. 1. 2019 14:01:32
Předmět: [Bug 1813023] Re: When dragging an object, objects behind him are
erased
"the recommended procedure is to submit a separate report for each bug
and attach an svg file with instructions as to which operation to
perform on the file in order to reproduce the bug.

--
You received this bug notification because you are subscribed to the bug
report.
https://bugs.launchpad.net/bugs/1813023

Title:
When dragging an object, objects behind him are erased

Status in Inkscape:
New

Bug description:
When dragging an object in Inkscape 0.92 and later, it often happens
that all objects behind the one being dragged are erased by a white
rectangle size of the bounding box. I noticed the bug on Windows 8 and
10 and all versions of Inkscape 0.92 on a variety computers (DELL,
Lenovo, HP, ASUS...). The bug is not dependent on the graphics card,
it occurs on a variety of Intel gfx cards and on nVidia cards alike.
The bug appears regardless to whether the objects are transparent or
blurred.

When zooming in / out of the picture, the missing parts are redrawn
again.

Besides the above said, I noticed that rendering the image during
drawing is notably slower in 0.92 than in 0.91. I use Inkscape to
teach my students vector graphics, but for the time being, I need to
keep the old version.

To manage notifications about this bug go to:
https://bugs.launchpad.net/inkscape/+bug/1813023/+subscriptions
"

[Bryce Harrington (bryce)]

Hi Jan,

Like Alvin mentioned, we've migrated to gitlab.com for issues going forward, and I too would encourage filing separate bug reports per distinct issue.

I am not sure what is causing the canvas refresh problem, although the renderer didn't change significantly between 0.91 and 0.92. The program shouldn't be taking 4 minutes to load up, so that makes me wonder if there is some other condition unique to your systems that might be involved.

Since we're not able to reproduce this issue so far, and since we're migrating to gitlab I'm going to close this issue out. Please feel free to file new bugs about the issues you're seeing at http://inkscape.org/report.

Closed by: https://gitlab.com/bryceharrington