POV-Ray: Newsgroups: povray.beta-test: PNG output

POV-Ray : Newsgroups : povray.beta-test : PNG output		Server Time 29 Jul 2024 02:21:54 EDT (-0400)

From: Gilles Tran
Subject: PNG output
Date: 16 Apr 2005 17:40:36
Message: <42618654@news.povray.org>

Unlike the BMP output, PNG output (+FN) doesn't cause POV-Ray to crash but 
the resulting file is corrupt according to several viewing or image apps 
(Windows XP viewer, Gimp, Picture Publisher). They either refuse to open the 
file or show a damaged picture (artefacts).

G.

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From: Gilles Tran
Subject: Re: PNG output CORRECTION
Date: 16 Apr 2005 17:48:00
Message: <42618810@news.povray.org>


42618654@news.povray.org...
> Unlike the BMP output, PNG output (+FN) doesn't cause POV-Ray to crash but 
> the resulting file is corrupt according to several viewing or image apps 
> (Windows XP viewer, Gimp, Picture Publisher). They either refuse to open 
> the file or show a damaged picture (artefacts).

What happens is that the file is kept open until POV-Ray is closed (it 
cannot be deleted for instances). Closing POV-Ray seems to add a couple of 
bytes to the file and then it becomes "finished" (and can be opened 
normally).

G.

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From: Gilles Tran
Subject: Re: PNG output CORRECTION
Date: 16 Apr 2005 17:57:28
Message: <42618a48@news.povray.org>


42618810@news.povray.org...

> 42618654@news.povray.org...
>> Unlike the BMP output, PNG output (+FN) doesn't cause POV-Ray to crash 
>> but the resulting file is corrupt according to several viewing or image 
>> apps (Windows XP viewer, Gimp, Picture Publisher). They either refuse to 
>> open the file or show a damaged picture (artefacts).
>
> What happens is that the file is kept open until POV-Ray is closed (it 
> cannot be deleted for instances). Closing POV-Ray seems to add a couple of 
> bytes to the file and then it becomes "finished" (and can be opened 
> normally).
>

Well, Windows and Picture Publisher find the PNG files to be OK but the GIMP 
still complains about the files being corrupted (but displays them OK after 
that)...

G.

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From: Thorsten Froehlich
Subject: Re: PNG output CORRECTION
Date: 16 Apr 2005 18:11:52
Message: <42618da8$1@news.povray.org>

Gilles Tran wrote:
> What happens is that the file is kept open until POV-Ray is closed (it 
> cannot be deleted for instances). Closing POV-Ray seems to add a couple of 
> bytes to the file and then it becomes "finished" (and can be opened 
> normally).

Thanks for pointing this out.  This actually applies to all image files. 
This problem will be fixed in the next beta.

	Thorsten

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