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Re: [ft-devel] ftgrays - exact pixel coverage?
From: |
Werner LEMBERG |
Subject: |
Re: [ft-devel] ftgrays - exact pixel coverage? |
Date: |
Thu, 09 Feb 2012 16:09:39 +0100 (CET) |
>> ... this deserves a comment in the code (near the word `exact' :-).
>> Alexei, can you prepare something?
>>
>
> What was the situation before the flattening was introduced?
No idea :-)
> As it stands right now with permitted deviation of up to ONE_PIXEL /
> 8, The coverage can be missed by as much as 0.169 of a pixel in the
> absolute worst (diagonal) case and less than half of that on
> average. So we are still better than 8 levels of gray from Redmond
> on average. How much better do we want to be is a real question.
Again I have no idea. However, I would like to have a comment which
mentions that due to flattening we slightly deviate from the `exact'
values.
Werner