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RE: Adam7 and narrow PNG

From: Melki Christian (consultant)
Subject: RE: Adam7 and narrow PNG
Date: Wed, 2 Oct 2013 06:57:56 +0000

Limited usefullness. I've used a lot of PNG's in GRUB lately and can't think of 
a reason why I would use either.
Maybe paletted 8-bit (if-that’s what you meant?) to save space.. but adam7? 
It's still going to be loaded as a bitmap.
If I had some web png's and was to lazy to pass them through a converter...
That beeing said, the work is done and unless it adds rediculous ammount of 
code size or execution time I'd be fine with the support.

> -----Original Message-----
> From: address@hidden
> [mailto:address@hidden On
> Behalf Of Vladimir 'f-coder/phcoder' Serbinenko
> Sent: den 2 oktober 2013 02:25
> To: The development of GRUB 2
> Subject: Adam7 and narrow PNG
> It was reported that GRUB doesn't support Adam7 and paletteed PNGs.
> Attached patch would implement both of them but combining them results
> in quite complex code since PNG works on bytes even if bpp <= 4 but
> adam7 works on pixels. Does anyone have thoughts on adam7 and narrow
> PNG usefulness?

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