On 02.10.2013 08:57, Melki Christian (consultant) wrote: > 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.. 8-bit palette is an easy one. The tricky one is 4-/2-/1-bit palettes (16-/4-/2-color) since then PNG packs several pixels in a single byte. Usefulness of it to compress image is debatable since although it saves space by itself, it messes with filter and huffman. > 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... The compatibility is the idea. Or if editor used by artist defaults to adam7 and doesn't have an option (at least not easily accessible one) to change this behaviour > 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: grub-devel-bounces+christian.melki=saabgroup....@gnu.org >> [mailto:grub-devel-bounces+christian.melki=saabgroup....@gnu.org] 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? > _______________________________________________ > Grub-devel mailing list > Grub-devel@gnu.org > https://lists.gnu.org/mailman/listinfo/grub-devel >
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