[OLPC-devel] Emulating the laptop display with Xephyr

[Mark J. Foster]

Hi, Arnd!

The text anti-aliasing algorithm is based on the full-resolution 
(1200x900) input image, with each input pixel having 19 bits of color 
information (R:6 G:7 B:6) - the algorithm computes the data for the 
current output pixel based on its input color information, along with 
that of its adjacent four neighbors (Up, Down, Left, Right).  Color 
swizzling is the last step in the process, where the appropriate six-bit 
result is written to the frame buffer and/or the LCD (the panel driver 
itself uses a six bit interface).

Cheers!
MarkF

Arnd Bergmann wrote:
> On Friday 28 July 2006 19:22, Manu Cornet wrote:
>   
>> There are a few screenshots on the project's wiki page :
>>
>> http://wiki.laptop.org/go/GTK_for_OLPC
>>
>> In particular, check you the difference between antialiased and not
>> antialiased swizzling :
>>     
>
> Hmm, I wonder how much difference there is between viewing
> this on a TFT and something that does not have its own
> structure interfering with it, e.g. a CRT.
>
> When zooming in, I found the diagonal line pattern somewhat
> irritating, but I guess there is not much that can be done
> about that.
>
> Is the text antialiasing algorithm sub-pixel based, or does it
> assume non-swizzled pixels?
>
> 	Arnd <><
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