[Paraview] Fwd: saving screen shot as a PNG image, Paraview-3.8.0

[Rakesh Hammond]

Sorry - I should have been more clearer

I am using the source tar ball 3.8.0 from the webpage

On 13 August 2010 19:41, Dave Partyka <dave.partyka at kitware.com> wrote:

> Hi Rakesh,
>
> You mentioned CVS. I just want to double check are you really still using
> CVS ParaView? or are you on the git release branch? Or using the source
> tarball from the webpage?
>
>
> On Fri, Aug 13, 2010 at 2:26 PM, Rakesh Hammond <
> rakesh.hammond at googlemail.com> wrote:
>
>>
>>
>> ---------- Forwarded message ----------
>> From: Rakesh Hammond <rakesh.hammond at googlemail.com>
>> Date: 13 August 2010 19:26
>> Subject: Re: [Paraview] saving screen shot as a PNG image, Paraview-3.8.0
>> To: pat marion <pat.marion at kitware.com>
>>
>>
>> Hi Pat,
>>
>> Thanks for your suggestion - but didn't help, PV-3.8 still crashed.
>>
>> I am able to save the screen shot using other formats (jpg, bmp etc).
>>
>> I looked into it a little bit further and I think this is where its seg
>> faulting
>> (I am on 3.8 release branch, not the latest CVS)
>>
>> in vtkPNGWriter.cxx
>>
>> line 278 - the following for loop
>>
>>  for (ui = 0; ui < height; ui++)
>>     {
>>     row_pointers[height - ui - 1] = (png_byte *)outPtr;
>>     outPtr = (unsigned char *)outPtr + rowInc;
>>     }
>>
>> However, if I put a print statement inside the for loop(Hello world for
>> example), PV doesn't crash.  This may be due to a memory leak some where
>> else.
>>
>> Can some one please comment on what sort of modifications I should make to
>> the above code?
>>
>> I think this may be a nasty bug to recreate - has any one else encountered
>> this problem?
>>
>> This is what I tried to do
>>
>> start PV
>> Load some data
>> File->SaveScreenShot->
>> Now choose the .PNG format and my PV-3.8 crashes
>>
>> Regards,
>>
>>
>> On 12 August 2010 19:26, pat marion <pat.marion at kitware.com> wrote:
>>
>>> Hi Rakesh,
>>>
>>> In Edit -> Settings -> Render View there is an option "Use Offscreen
>>> Rendering for Screenshots."  On some systems, this option will cause a crash
>>> when enabled.
>>>
>>> Pat
>>>
>>> On Thu, Aug 12, 2010 at 1:42 PM, Rakesh Hammond <
>>> rakesh.hammond at googlemail.com> wrote:
>>>
>>>>  Hi
>>>>
>>>> I have a .pvti file which I can visualize in Paraview-3.8.0.
>>>>
>>>> I would like to save a slice from my data set and able to display the
>>>> results correctly.
>>>> However, when I select SaveScreen option with PNG format, it seg faults.
>>>>
>>>> I am able to get this to work correctly on 3.6.2 without seg faulting.
>>>>
>>>> I am on SuSe-10.2.
>>>>
>>>> Do I need to turn on the USE_SYSTEM_PNG flag in CMake and re-compile?
>>>> I haven't done this for 3.6.2 and works OK.
>>>>
>>>> Has any one else come across this problem before?
>>>>
>>>> Any pointers would be greatly appreciated.
>>>>
>>>> Regards,
>>>>
>>>> Rakesh
>>>>
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>>>
>>
>>
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