This are the PNG read options. I'm not sure what means "Alpha is enabled?", but I can switch on/off the alpha per Ctrl-H, that works for the preview image, but I don't want to get a transparent image. I'm looking for a black disk at white ground. If I enable the alpha of the preview, than I get the XnView grey as background, but no the white of the image background.
I'm not sure what the is the best way to recreate the thumbnails. I copied the test image to a new directory and look at this directory. A new thumbnail should be created or?
Yes and No. I like, that your example show the white background without artefacts at the downscaled image "PNG_test", but I don't like, that the sky background is not visible at the original image "Eiche.png". I would like to see the background at both images, sky at "Eiche" and white at "test".
Or is the background color destroyed by Photoshop, so that PNG_Test dosn't contain any background info? And all other image software show the transparency with a white background allways? In this case, XnView could only support an option like "transparency fill color for missing background" for images without background info. But maybe it's a problem to detect, is a background at the PNG available or not. In this case you can't do anything.
One thing could be done - if I take my black disk image and I try to convert it to an image without transparency, than I used the convert function and convert the image to true colours. In this case I get a black quadrat. Could you make, that the transparency is taken in acount and the background is filled with white (or better the user can choose the color)?
This thread is totally confusing. So far I found out:
- the circle test file from the first post is shown as black square when 'Ignore Alpha Channel' is checked in Options/General/Operations. As I never changed this setting the default (unchecked) shows a circle and seems to be correct.
- As mentioned above to see the picture as intended (transparent, XnView is a viewer...) the option 'Compose Image with alpha (32 bits)' must be unchecked. This is not the default setting, which is highly disappointing as nobody will ever find this setting - nor understand it - IMHO.
Well, and I don't fully understand where exactly the problem is. What I see on my system is that the thumbnail in the browser is always shown transparent, no matter which option I use. Is it there where you want to see it without transparency?
Is the black square effect in preview mode on your system? Did you try with a fresh ini? There must be more settings influencing this if it works on my system but not on yours.
