https://bugs.freedesktop.org/show_bug.cgi?id=92309
--- Comment #18 from Alex Deucher alexdeucher@gmail.com --- (In reply to acutiator from comment #17)
This is what I'm asking you, actually. I don't know if it's possible. I'm asking if it is. From what I understand based on the comments by Michel and Kamil it sounds like it should be possible. So I wanted to clarify on whether or not it is. The comment about a (0,0,0,0) pixel being a clear indicator that something is wrong is what triggered my question. If it can be clearly detected that it's a premultiplied alpha, even when the program doesn't indicate this, I would think that should be implemented. Now the question is if that can be easily detected without human intervention. But based on your question to me it doesn't sound like it is. Is that correct?
Correct. I don't think it's possible. We just get the raw image. How do you determine the indent of a specific pixel based on the pixel value? Did the provider intend it to be clear or did they indent it to be some specific color?