png transparency not supported (lost in output) about hqx HOT 10 CLOSED

sorry, I attached the first icon in my folder without thinking. I'm not angry 
:D, attached below is another more neutral one :)

Looks like the code for hqx drops the alpha bit because of RGBtoYUV conversion. 
(hqx.c)

Any chance this will be fixed in the future? I need my sprite's border to 
antialias against a transparent background and not some arbitrary color. So 
preserving the alpha channel is important for me...

Yes please fix, need alpha! Thanks!

I added transparency handling to this code. It works for me (Debian x64), 
though I didn't test it very much. You can download the source code here: 
http://bitbucket.org/Mytskine/hqx/downloads

@comment 1: your smiley has no transparency! But I stilled used it for my tests 
after using Gimp to turn white into alpha.

@comment 2: Here there's no "alpha bit", but an alpha byte (8 bits). And the 
RGBtoYUV conversion isn't the only problem, so the main changes where not in 
"hqx.c".

Thank you! After some hacking I got it working on windows using MSVC2010.

[deleted comment]

For the people (like me) who have a result that is blocky at the borders, the 
alpha channel alone is not enough. Also color the R, G and B channels 
appropriately to get a nice border.

Yes I would love to support alpha. @mytskine can you supply me with a patch of 
the changes you have made?

Integrated changes by mytskine