[tex-k] zoom problem in xdvi

[Stefan Ulrich]

Hi,

I can't reproduce this on Linux with my EPS test files and gs 8.64.
Could you send me a minimal example file via Email?

Best regards,
Stefan

On Wed, Mar 3, 2010 at 10:59 AM, tmlam <tmlam at se.cuhk.edu.hk> wrote:
> Hi Stefan,
>
> The version in Solaris is 8.54. The one in Linux is compiled from source
> myself without extra configuration options. I am not if that make a
> difference.
>
> Anyway, I can confirm that it works after toggling the anti-aliasing option
> once. With "-gsalpha" which turns on the anti-aliasing, it will still have
> the zoom problem with figures. Turning it off afterward solved it instead.
>
> Regards,
>
> TM Lam
>
> On 3/3/2010 5:36 PM, Stefan Ulrich wrote:
>>
>> Hi,
>>
>> yes I meant the -gsalpha or +gsalpha option for xdvi and the 'v'
>> keystroke for xdvi (to toggle PS display), or 'V' to turn
>> anti-aliasing on or off. The latter will actually restart the gs
>> process, so it should be a workaround for this issue.
>>
>> Please compare the ghostscript versions on Linux (where it's broken)
>> with those on Solaris (where it works). Last time I looked there was
>> performance optimization in newer ghostscript versions that didn't
>> recompute the anti-aliased images when the zoom factor changed, but I
>> couldn't find out how to work around this in xdvi. I'm a bit surprised
>> that it also happens with anti-aliasing off; could you please
>> double-check this? (Use the +gsalpha option to turn if off, or check
>> that the menu option is switched off).
>>
>> Best regards,
>> Stefan
>>
>> On Wed, Mar 3, 2010 at 10:06 AM, tmlam<tmlam at se.cuhk.edu.hk>  wrote:
>>>
>>> Hi Stefan,
>>>
>>> I think you meant -gsalpha with xdvi. Anyway, as I said, turning
>>> anti-aliasing on with -gsalpha does not help but turning it off afterward
>>> solved the problem. However, xdvi by default does not turn on
>>> anti-aliasing
>>> by default (unless with -gsalpha). Somehow by turning it on to off solves
>>> the problem. Therefore, I believe there is something wrong.
>>>
>>> Regards,
>>>
>>> TM Lam
>>>
>>> On 3/3/2010 4:39 PM, tmlam wrote:
>>>>
>>>> Hi Stefan,
>>>>
>>>> Ghostscript is 8.64. I suppose the option -gsapha is to be used with gs.
>>>> However, gs is invoked by xdvi. How can we pass the option to gs through
>>>> xdvi?
>>>>
>>>> In fact, you are right about the anti-aliasing. There is an option
>>>> button in xdvi that allow turning PS anti-aliasing on/off. By turn it to
>>>> on, and then off, the figures can be displayed normally after zooming.
>>>> Very strange.
>>>>
>>>> I don't know how to switch postscript on/off. What keystroke we need to
>>>> press? I assume it is for xdvi.
>>>>
>>>> Many thanks for you ideas.
>>>>
>>>> Regards,
>>>>
>>>> TM Lam
>>>>
>>>>
>>>>
>>>> On 3/3/2010 3:37 PM, Stefan Ulrich wrote:
>>>>>
>>>>> Hi,
>>>>>
>>>>> Usually such problems are related to ghostscript. What are the
>>>>> ghostscript versions on these installations? Does the behaviour change
>>>>> if you switch off Postscript anti-aliasing (Menu or -gsapha option)?
>>>>> Does it work after you switch postscript on/off (v keystroke)?
>>>>>
>>>>> Best regards,
>>>>> Stefan
>>>>>
>>>>> On Wed, Mar 3, 2010 at 5:18 AM, tmlam<tmlam at se.cuhk.edu.hk>  wrote:
>>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> It seems that the xdvi in Linux has problem when zooming in. The
>>>>>> figures
>>>>>> (eps) will not zoom correctly. In fact, part of the figure will be
>>>>>> vanished.
>>>>>> I tried the xdvi in texlive 2009, the original xdvi in CentOS 5.4,
>>>>>> both have
>>>>>> this problem. However, running xdvi (texlive 2009) on Solaris (SPARC)
>>>>>> does
>>>>>> not have this problem.
>>>>>>
>>>>>> Is there a fix in Linux?
>>>>>>
>>>>>> TIA,
>>>>>>
>>>>>> TM Lam
>>>>>>
>>>>>>
>>>
>>>
>
>