[bug #57335] PNG writing support appears to be broken

From	Yavor Doganov <INVALID.NOREPLY@gnu.org>
Newsgroups	gnu.gnustep.bug
Subject	[bug #57335] PNG writing support appears to be broken
Date	2019-12-02 02:02 -0500
Message-ID	<mailman.97.1575270133.1979.bug-gnustep@gnu.org> (permalink)
References	<20191201-185428.sv47215.42504@savannah.gnu.org> <20191201-220010.sv431.4631@savannah.gnu.org> <20191202-090210.sv47215.65969@savannah.gnu.org>

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Follow-up Comment #2, bug #57335 (project gnustep):

[comment #1 comment #1:]
> the white bits where shown as black. Is this the bug you are reporting?

Yes.

> What you did is switch off this conversion.

Yes, but not as a "fix", I was hoping that it might give you a clue what's
going wrong.

> And for simple data where alpha is either 1 or 0 this results in correct
images.

I just tried with a half-transparent image (alpha 0.5) and to my surprise the
conversion is correct with current code.  But I'm afraid that "simple data" is
quite a common case, especially for icons.

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[bug #57335] PNG writing support appears to be broken Yavor Doganov <INVALID.NOREPLY@gnu.org> - 2019-12-02 02:02 -0500

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