[png-mng-implement] Optimize PNG Size

[cprogrammer <cpr...@gm...>]

hello all,

i am writing a program that converts a BMP to a PNG using libpng and i want
my output PNG to be the smallest posibile...
and right now ... i need some tips ... :)

first off all i have removed redundant/not used colors in PLTE
i have set *png_set_compression_level to 9* and *
png_set_compression_strategy* to Z_DEFAULT_STRATEGY

what can i do more ?

many thaks

-- 
If God had intended humans to program, we would be born with I/O ports