PNG Transformation

Please use this forum to post bug reports, feature requests, tips, etc. for beta versions of Picture Window Pro 8

Moderator: jsachs

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Winfried
Posts: 239
Joined: June 18th, 2010, 4:27 pm
What is the make/model of your primary camera?: Pentax K1

PNG Transformation

Post by Winfried »

I am not able to save a PNG-file with the Save As button from the PNG Transformation.
Just a zero-Byte file is saved, i.e. just the filename, but no data.
I know, I was able to save a PNG-file some versions ago. Bug or a problem with my system (security? again)
Winfried
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migrated to Windows 10 in Nov. 2019
PWP Pro 64
CUDA not available
jsachs
Posts: 4203
Joined: January 22nd, 2009, 11:03 pm

Re: PNG Transformation

Post by jsachs »

I just tried it here and it seemed to be working. Let me know if you can narrow down the problem.
Jonathan Sachs
Digital Light & Color
Winfried
Posts: 239
Joined: June 18th, 2010, 4:27 pm
What is the make/model of your primary camera?: Pentax K1

Re: PNG Transformation

Post by Winfried »

I did some more test and maybe found the guilty: colormanagement
If colormanagement is disabled, the save seemes to work
If it is enabled an empty file is created
Winfried
-----
migrated to Windows 10 in Nov. 2019
PWP Pro 64
CUDA not available
jsachs
Posts: 4203
Joined: January 22nd, 2009, 11:03 pm

Re: PNG Transformation

Post by jsachs »

Still not seeing it here -- can you post a screen shot of your color management settings? Also, what profile is associated with the image you are saving?

I don't see how color management comes into play in saving PNGs, so maybe you could email a copy of afile that fails as well.
Jonathan Sachs
Digital Light & Color
Winfried
Posts: 239
Joined: June 18th, 2010, 4:27 pm
What is the make/model of your primary camera?: Pentax K1

Re: PNG Transformation

Post by Winfried »

mail send
Winfried
-----
migrated to Windows 10 in Nov. 2019
PWP Pro 64
CUDA not available
jsachs
Posts: 4203
Joined: January 22nd, 2009, 11:03 pm

Re: PNG Transformation

Post by jsachs »

The problem is deep inside the PNG library which apparently checks for bad copies of the sRGB profile and seems to have decided that the one we use (which was downloaded from www.color.org) is invalid. I am working on finding a way to reconfigure the library to stop doing this "helpful" behavior.
Jonathan Sachs
Digital Light & Color
jsachs
Posts: 4203
Joined: January 22nd, 2009, 11:03 pm

Re: PNG Transformation

Post by jsachs »

I finally figured out how to suppress the PNG profile validation, so the problem should be fixed for the next release.
Jonathan Sachs
Digital Light & Color
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