Issue 103842 - In the version 3.1 with Impress,a slide is not the same at design time than at presentation time
Summary: In the version 3.1 with Impress,a slide is not the same at design time than a...
Alias: None
Product: Impress
Classification: Application
Component: formatting (show other issues)
Version: OOO310m1
Hardware: PC Windows XP
: P3 Trivial (vote)
Target Milestone: ---
Assignee: AOO issues mailing list
QA Contact:
Keywords: needmoreinfo
Depends on:
Reported: 2009-07-27 16:44 UTC by jorgefm
Modified: 2017-05-20 10:55 UTC (History)
2 users (show)

See Also:
Issue Type: DEFECT
Latest Confirmation in: ---
Developer Difficulty: ---

example file (465.87 KB, text/plain)
2009-07-27 16:47 UTC, jorgefm
no flags Details
example shot (25.27 KB, text/plain)
2009-07-28 09:19 UTC, jorgefm
no flags Details
Presentation mode 1280x1024 (98.52 KB, image/jpeg)
2009-09-01 10:48 UTC, fusero
no flags Details
Presentation mode 1280x800 (76.98 KB, text/plain)
2009-09-01 10:50 UTC, fusero
no flags Details
Presentation mode 1280x800 (76.98 KB, image/jpeg)
2009-09-01 10:50 UTC, fusero
no flags Details
Edition mode with zoom (152.28 KB, image/jpeg)
2009-09-01 10:54 UTC, fusero
no flags Details
Presentation mode 1280x800 antialiasing disabled (73.74 KB, image/jpeg)
2009-09-03 14:37 UTC, fusero
no flags Details
screenshot of small window (123.79 KB, image/jpeg)
2009-09-11 06:11 UTC, cemkaner
no flags Details
Screenshot of medium window (153.26 KB, image/jpeg)
2009-09-11 06:11 UTC, cemkaner
no flags Details
Screenshot of large window (197.55 KB, image/jpeg)
2009-09-11 06:12 UTC, cemkaner
no flags Details

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Description jorgefm 2009-07-27 16:44:29 UTC
In the enclosed file I have a presentation that the lines are different at
design time that at presentation time, please have a look to the enclosed file

Reproducible: Always

Steps to Reproduce: the file f5
Comment 1 jorgefm 2009-07-27 16:47:50 UTC
Created attachment 63807 [details]
example file
Comment 2 wolframgarten 2009-07-28 07:31:33 UTC
Please add some screenshots and mark the problem or describe it more precise.
Comment 3 jorgefm 2009-07-28 09:18:56 UTC
I add a screenshot of the impress problem. You can see that the lines width 
are different at presentation time and design time
Comment 4 jorgefm 2009-07-28 09:19:50 UTC
Created attachment 63818 [details]
example shot
Comment 5 wolframgarten 2009-07-29 12:39:48 UTC
Sorry, not reproducible here. Is this a special monitor resolution you are
using? Does it happen when you deselect AntiAliasing under Tools/options/view
graphics output? Thanks for your help.
Comment 6 fusero 2009-08-26 08:28:39 UTC
wg, cannot you see that some lines have different width at edition time and at
presentation time? Another difference is that grey lines may appear as black at
presentation time (as pointed out in the screenshot).

Some other times, the white spaces between cell borders are black at
presentation time....

When switching from antialiasing to not antialiasing the difference is shown
only at edition time. At presentation time the result is the same both with and
without antialiasing.

We want the result to llok exactly the same at edition time and at presentation
time when it comes to lines borders, widths and colors.

Did this provide enough detail in order to be able to reproduce the bug?

Comment 7 wolframgarten 2009-08-26 11:54:40 UTC
When anti aliasing is switched off you say that the problem is only visible in
edit view. Does it consist even if you zoom into the view? I think that this is
a problem connected to Anti-aliasing and the used monitor resolution. I can only
reproduce something if I chose Slide Show/SlideShow Settings ,Type Window. With
a quite small window something similar to your screenshot appears. Normally I
use a 24 inch Monitor and cannot reproduce your problem. Whats your monitor
Comment 8 fusero 2009-09-01 10:47:37 UTC
Hi wg, i am attaching three aditional shots in order to provide more details:

- In edition mode, (using my laptop: 1280x800 resolution) when i zoom into the
grid, i see it much better. Please have a look at file

- In presentation mode (using my laptop: 1280x800), the problems appear. Please
have a look at "presentation_mode_1280x800.jpg"

- In presentation mode, using another computer (1280x1024 resolution), problems
do not appear. Example in file: "presentation_mode_1280x1024.jpg"

Hope this helps

Comment 9 fusero 2009-09-01 10:48:56 UTC
Created attachment 64472 [details]
Presentation mode 1280x1024
Comment 10 fusero 2009-09-01 10:50:08 UTC
Created attachment 64473 [details]
Presentation mode 1280x800
Comment 11 fusero 2009-09-01 10:50:16 UTC
Created attachment 64474 [details]
Presentation mode 1280x800
Comment 12 fusero 2009-09-01 10:54:04 UTC
Created attachment 64475 [details]
Edition mode with zoom
Comment 13 wolframgarten 2009-09-03 14:08:40 UTC
Please try if the problem exists when Anti Aliasing is switched off : uncheck
Tools/options/view/use anti aliasing. Thanks again.
Comment 14 fusero 2009-09-03 14:36:45 UTC
the problem persists whe antialiasing is disabled. See attachment:
Comment 15 fusero 2009-09-03 14:37:42 UTC
Created attachment 64526 [details]
Presentation mode 1280x800 antialiasing disabled
Comment 16 talemu2009 2009-09-06 02:37:01 UTC
I tried to replicate the bug on window xp proffessional edition service pack 3 
on a toshiba laptop of 1GB of ram with 1.66hz processing speed. I couldn't 
replicate the bug. If you can add some information on how you created the table 
diagram which shows difference at design and slide show.I created the table 
insert table command. 
Comment 17 cemkaner 2009-09-11 06:11:02 UTC
Created attachment 64683 [details]
screenshot of small window
Comment 18 cemkaner 2009-09-11 06:11:41 UTC
Created attachment 64684 [details]
Screenshot of medium window
Comment 19 cemkaner 2009-09-11 06:12:21 UTC
Created attachment 64685 [details]
Screenshot of large window
Comment 20 cemkaner 2009-09-11 06:29:01 UTC
I think I have replicated this, but I don't think that what I see is a bug, or
if we call it a bug, not a bug that is within the reasonable control of the OOo

Configuration: Dell Precision M6300 1920x1200 display, Windows XP, OOo-dev 3.2.0
DEV300m55, antialiasing turned off

(1) download file prueba.odp from the attachments above
(2) Set zoom to variable so the slide is scaled to fit within the window
(3) Scale the window (make it small, see small.jpg, make it bigger, see
medium.jpg, make it bigger, see large.jpg)
(4) The slide should show vertical and horizontal lines that are styled as two
relatively lightweight parallel lines. Instead, at different scalings, some of
the horizontals or verticals are displayed as one thick black line rather than
two thinner parallel lines separated by whitespace. This looks like the same
distortion identified in attachment: Tue Sep 1 09:50:00 +0000 2009:

I see this kind of distortion when resizing windows in other applications. The
display algorithm has a rounding error (I assume) and fills in the space between
the lines. Given that I see this in other applications (Adobe Premiere for
example), I assume this is a minor bug in a library routine used by OOo and many
other applications, or perhaps in libraries provided with Windows. 

The usual workaround is to display the window at a resolution that is an even
multiple of the resolution at which the slide was created, so that we aren't
attempting to draw, for example, a 3-pixel wide area into a 2-pixel or 5-pixel
area. Drawing those half-pixels is a nuisance. Similarly, the height should
probably be multiplied by the same amount as the width.

Maybe my intuition about cause is incorrect but the workaround does appear to
work for these slides on my machine.
Comment 21 fusero 2009-09-11 08:20:23 UTC
Hi cemkaner, you didi it. You replicated the problem. I agree with you that
rounding widths of lines is a behaviour shown in other pieces of SW but main
problem here is that the rounding is not done in a consistent way. Some times in
a use case witdh is rounded to 2 and some other times -in a similar use case- it
is rounded to 1.

This makes auwful the visualization of the file when it comes to slideshow mode.

Two last things:

-> Same grid is perfectly shown by PowerPoint (we are trying to migrate)
-> The resolution is not a proper workaround because we cannot guarantee the
resolution that we are going to find in customer dependencies when showing this

What do you think?
Comment 22 wolframgarten 2009-09-11 11:05:58 UTC
@cemkaner: thanks for your explicit help!
Reassinged. @af: is there something that could be done about this rounding problem? 
Comment 23 yohana22 2010-03-25 13:16:44 UTC
We’ve tried version 3.2 and the error is still in there.
Comment 24 Marcus 2017-05-20 10:55:59 UTC
Reset assigne to the default "".