[Upstream] [regression] font display corruption in merged cells containing line breaks in Calc when scrolling

[Ilja Sekler]

Binary package hint: openoffice.org

Pixel rows inside merged and centered cells in Calc get randomly dropped or (seldom) duplicated when scrolling the sheet. This is a regression from openoffice.org-calc 3.2.1-7ubuntu1 res. OpenOffice.org 3.2.1 which I see in Ubuntu's openoffice.org-calc 3.2.1-7ubuntu1.1 as well as in OpenOffice.org 3.3.0 from Sun/Oracle.

Steps to reproduce:

1. Select a cell range spanning some cell rows, merge and center the selected cells.

2. Activate "wrap text automatically" for the merged cells.

3. Insert a (long) text and leave the cell.

4. Scroll the sheet.

Ubuntu release: 10.10
openoffice.org-calc 3.2.1-7ubuntu1.1

I see this both with Metacity and with Compiz. It doesn't matter whether Calc runs fullscreen or in a window.

lspci -nnk | grep -A 2 VGA
00:02.0 VGA compatible controller [0300]: Intel Corporation N10 Family Integrated Graphics Controller [8086:a011]
 Subsystem: ASUSTeK Computer Inc. Device [1043:83ac]
 Kernel driver in use: i915

[Ilja Sekler (ilja-sekler-)]

LibreOffice 3.3.0
OOO330m19 (Build:6)
tag libreoffice-3.3.0.4

is also affected.

[Ilja Sekler (ilja-sekler-)]

The bug is present in

LibreOffice 3.3.1
OOO330m19 (Build:7)
tag libreoffice-3.3.1.1

as well.

[Ilja Sekler (ilja-sekler-)]

After further testing it turns out to be that only like breaks are required and that the issue is not linked to Intel graphics. Retested and reproduced with

LibreOffice 3.3.0
OOO330m19 (Build:6)
tag libreoffice-3.3.0.4, Ubuntu package 1:3.3.0-1ubuntu1

on Natty too. Adjusting the summary and the package accordingly, as LibreOffice will surely get more attention.

[Ilja Sekler (ilja-sekler-)]

Created attachment 43646
Screenshot illustrating the issue

When scrolling a sheet with merged cells, a few pixel high stripe hidden behind the column header at scroll stops is randomly dropped or duplicated, corrupting font display in the merged cells. This was not the case in OpenOffice.org 3.2.1, but was introduced during the development cycle of 3.3.0 and was imported by LibreOffice as well.

Only fonts in the merged cells are affected, not graphics. Text with line breaks in normal, not merged cells is not affected too, because Calc scrolls always row-wise.

STR:

1. Select a cell range spanning some cell rows, merge selected cells.

2. Activate "wrap text automatically" for the merged cells to get line breaks.

3. Insert a (long) text and leave the cell.

4. Vertically scroll the sheet.

Actual results: randomly dropped or duplicated horizontal stripes corrupting font display in the cell.

Both normal and page break preview are affected, forcing redraw of the cell by resizing the window or scrolling horizontally clears the font corruption.

Tested with

LibreOffice 3.3.1
OOO330m19 (Build:8)
tag libreoffice-3.3.1.2

on Ubuntu 10.10 and with the current LibreOffice package shipped with Ubuntu Natty. Downstream bug: <https://bugs.launchpad.net/ubuntu/+source/libreoffice/+bug/720327>.

[Ilja Sekler (ilja-sekler-)]

Created attachment 43647
a simple testcase

[Ilja Sekler (ilja-sekler-)]

Filed upstream bug <https://bugs.freedesktop.org/show_bug.cgi?id=34558> and adjusted once again the summary.

[Ilja Sekler (ilja-sekler-)]

FYI: The issue is fixed in Beta 1 of Oracle's OpenOffice.org 3.4 (Build:9583). The display gets properly redrawn on scroll. I don't have a build environment set up for LibreOffice, so I can't tell whether the bug is already fixed in the current LibreOffice code as well.

[Björn Michaelsen (bjoern-michaelsen)]

needs to be fixed upstream.

[Björn Michaelsen (bjoern-michaelsen)]

I can confirm the issue with 3.4/recent master.

[Libreoffice-z (libreoffice-z)]

Related to "Bug 36391 - VIEWING Redraw problems"?

[Reproducible] with reporter's sample and "LibreOffice 3.4.5 RC1 - WIN7 Home Premium (64bit) German UI [Build ID: OOO340m1 (Build:501)]" with 64 bit AMD Phenom II X4 955 Processor 3.2 GHz, 4GB RAM, Graphic Card: NVIDIA GeForce GT 430

Also with Server installation of Master "LOdev 3.5.0beta2+ – WIN7 Home Premium (64bit) ENGLISH UI [Build ID: 22905fb-b605e4f-4c1bcb5]" Win-x86@6- - pull time 2011-12-20 20:59:59)

@Ilja Sekler:
<http://wiki.documentfoundation.org/BugReport_Details#Version>
Your version is?

@Kohei:
Please feel free to reassign (or reset Assignee to default) if it’s not your area or if provided information is not sufficient. Please set Status to ASSIGNED if you accept this Bug.

[Ilja Sekler (ilja-sekler-)]

> Related to "Bug 36391 - VIEWING Redraw problems"?

Bug 36391 is rather a dupe of this one, but for Windows as well. Adjusting Platform from "Other - Linux (All)" to "All - All".

> @Ilja Sekler:
<http://wiki.documentfoundation.org/BugReport_Details#Version>
Your version is?

Version set to "LibO 3.3.0 release" according to <https://bugs.launchpad.net/ubuntu/+source/libreoffice/+bug/720327/comments/3>.

[Libreoffice-bugs (libreoffice-bugs)]

David Tardon committed a patch related to this issue.
It has been pushed to "master":

http://cgit.freedesktop.org/libreoffice/core/commit/?id=e462a30d03c16aa4202f8d28ad52b15feb3d9255

fdo#34558 don't crash on undoing text frame removal

The patch should be included in the daily builds available at
http://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More
information about daily builds can be found at:
http://wiki.documentfoundation.org/Testing_Daily_Builds
Affected users are encouraged to test the fix and report feedback.

[Joren-libreoffice (joren-libreoffice)]

(In reply to comment #5)
> David Tardon committed a patch related to this issue.
> It has been pushed to "master":
>
> http://cgit.freedesktop.org/libreoffice/core/commit/
> ?id=e462a30d03c16aa4202f8d28ad52b15feb3d9255
>
> fdo#34558 don't crash on undoing text frame removal
>
>
>
> The patch should be included in the daily builds available at
> http://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More
> information about daily builds can be found at:
> http://wiki.documentfoundation.org/Testing_Daily_Builds
> Affected users are encouraged to test the fix and report feedback.

Sorry for that, but due a typo in the title this message was posted to the wrong bug report. Therefore I also delete the 'whiteboard target'.

Kind regards,
Joren

[Libreoffice-bugs (libreoffice-bugs)]

Michael Stahl committed a patch related to this issue.
It has been pushed to "master":

http://cgit.freedesktop.org/libreoffice/core/commit/?id=ed09e6b233eac719744b32daf0ea47cea423bcc3

Revert "fdo#34558 don't crash on undoing text frame removal"

The patch should be included in the daily builds available at
http://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More
information about daily builds can be found at:
http://wiki.documentfoundation.org/Testing_Daily_Builds
Affected users are encouraged to test the fix and report feedback.

[Korrawit Pruegsanusak (detective-conan-1412)]

Removed the target again per comment 7

[Björn Michaelsen (bjoern-michaelsen)]

Resolving as per upstream: https://bugs.documentfoundation.org/show_bug.cgi?id=34558#c10