Images going black

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mwieder
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Re: Images going black

Post by mwieder » Wed Nov 11, 2020 3:58 am

hello? a *beta* operating system?

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Re: Images going black

Post by richmond62 » Wed Nov 11, 2020 10:10 am

mwieder wrote:
Wed Nov 11, 2020 3:58 am
hello? a *beta* operating system?
Indeed: and the end of a long line of beta operating systems running from macOS 10.15.0
to macOS 11.0.1, and, only with macOS 11.0.1 has this phenomenon with PNG images and LiveCode happened.

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Re: Images going black

Post by richmond62 » Wed Nov 11, 2020 10:35 am

So . . .

I ran up a stack containing some PNG images I downloaded from the internet alongside PNG images made in GIMP.
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Screenshot 2020-11-11 at 11.30.22.png
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In the stack, as you can see, both images are rendered properly.
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Screenshot 2020-11-11 at 11.32.29.png
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In a Macintosh standalone the image from the internet looks fine, but the GIMP one does not.

This is odd as I never, in about 15 years, had this type of problem with a GIMP png image before.

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Re: Images going black

Post by richmond62 » Mon Nov 16, 2020 8:53 pm

Screenshot 2020-11-16 at 21.50.56.jpg
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In a standalone the PNG processed in GIMP fales, while the PNG prcessed in Photoshop 21 trial version succeeds.

Currently NOT running beta software: this is macOS 11.0.1 final.

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Re: Images going black

Post by jacque » Tue Nov 17, 2020 9:31 pm

That looks like all LC sees is the alpha channel.
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Re: Images going black

Post by richmond62 » Sat Nov 21, 2020 3:29 pm

Oddly enough Seashore ( a GIMP derivative) produces PNG images that behave themselves:
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PING_PROB.jpg
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https://github.com/robaho/seashore

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Re: Images going black

Post by bn » Sat Nov 21, 2020 6:33 pm

Richmond,

could you have a look at the color profiles of the different images? If you select an image on a Mac and then do command + i you get the info. There should be a section that indicates which color profiles those images use. If those are different from the Gimp vs Photoshop/Seashore then you could change the color profile of the Gimp png to a profile of the other ones. Use Color Sync.app for that.
This is just a hunch and might not be the problem but it is worth a try.

Kind regards
Bernd

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Re: Images going black

Post by bn » Sat Nov 21, 2020 9:51 pm

You could also try to upload a zipped Gimp png that is not working and a zipped Seashor png that is working. I could have a look at them.

Kind regards
Bernd

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Re: Images going black

Post by richmond62 » Sat Nov 21, 2020 10:06 pm

Here we go then . . .
-
Krita

Photoshop

Gimp
Attachments
house_Krita.png.zip
(24.34 KiB) Downloaded 5 times
houseGIMP.png.zip
(25.27 KiB) Downloaded 5 times
hoosePHSH.png.zip
(67.47 KiB) Downloaded 5 times
Last edited by richmond62 on Sat Nov 21, 2020 10:08 pm, edited 1 time in total.

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Re: Images going black

Post by richmond62 » Sat Nov 21, 2020 10:08 pm

More than 3 options:

This is the Seashore one.
Attachments
houseSeashore.zip
(23.9 KiB) Downloaded 5 times

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Re: Images going black

Post by bn » Sat Nov 21, 2020 11:17 pm

the profiles are

houseGIMP.png
GIMP built-in sRGB


houseSeashore.png
sRGB IEC61966-2.1

hoosePHSH.png
RGB


house_Krita.png
sRGB built-in


I attach the houseGimp with color profile sRGB IEC61966-2.1

Could you try this one?
houseGIMP 2 other profile.png.zip
(24.15 KiB) Downloaded 5 times
Kind regards
Bernd

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Re: Images going black

Post by richmond62 » Sun Nov 22, 2020 6:55 pm

Whacko!

Thank you Bernd for your trouble.
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Screenshot 2020-11-22 at 19.52.48.png
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Now there are 2 considerations to point out re GIMP png images with their original profiles:

1. They appear perfectly properly in stacks.

2. On the first card of a macOS standalone they appear perfectly properly.

3. It is only on second and subsequent cards in standalones that these images seem to appear as their alpha-channel mask.

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Re: Images going black

Post by bn » Sun Nov 22, 2020 7:08 pm

Glad it worked.

Maybe you can change the default color profile in GIMP?

Kind regards
Bernd

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Re: Images going black

Post by richmond62 » Sun Nov 22, 2020 7:15 pm

That does seem a good idea.

But it will take me some time to located .icm files to do that.

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Re: Images going black

Post by richmond62 » Sun Nov 22, 2020 7:46 pm

Screenshot 2020-11-22 at 20.44.30.png
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Hmm . . .

Frankly, I shall stick to Seashore.
Attachments
hooseJRM.png.zip
(38.83 KiB) Downloaded 15 times
PHL 274E5 Calibrated.icc.zip
My display profile
(2.73 KiB) Downloaded 5 times

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