MobileRead Forums - View Single Post - 602 FBreader : a different way of displaying images ?

GrayNM · 02-08-2011, 01:31 PM

Tulapi
Yes, FBReader uses dithering.
The simple algorithm with fixed pattern, as you can see.

I suppose that was done because FBReader works in 2-bit color mode.
That's correct at least for PB301/360. I didn`t see FBReader sources from Pro series, but I think they remain the same.
The main reason behind using 4-color mode in FBreader is the speed. 8- or 16-color modes are much slower.

Image viewer uses best available mode so it doesn't needed to use so aggressive dithering. But there is no reason to use the same mode in the text reader.

02-08-2011, 01:31 PM	#12
GrayNM flat square cat Posts: 30 Karma: 1004 Join Date: Apr 2010 Location: Moscow region Device: PocketBook 360	Tulapi Yes, FBReader uses dithering. The simple algorithm with fixed pattern, as you can see. I suppose that was done because FBReader works in 2-bit color mode. That's correct at least for PB301/360. I didn`t see FBReader sources from Pro series, but I think they remain the same. The main reason behind using 4-color mode in FBreader is the speed. 8- or 16-color modes are much slower. Image viewer uses best available mode so it doesn't needed to use so aggressive dithering. But there is no reason to use the same mode in the text reader.