: - The every pixel is divided by 255 in the drawing loop. ( alphablend 
case )
: - In case ARM, ARM core do not support hardware for division. Instead, 
compiler implement a division by calling software routine in C library. The 
standard integer division routine supported by C library takes 20~100 cycle. 
It depens on ARM processor family.

In that case, perhaps we should use a macro to
perform the alphablending, which could then be
/255 for accuracy, or >>8 for speed, and set it
in device.h.

Regards,

Greg 


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