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Re: [ft-devel] two delta_shift questions
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From: |
Alexei Podtelezhnikov |
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Subject: |
Re: [ft-devel] two delta_shift questions |
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Date: |
Mon, 13 Oct 2014 16:41:21 -0400 |
On Mon, Oct 13, 2014 at 11:27 AM, Alexei Podtelezhnikov
<address@hidden> wrote:
> The second question is how often do you see delta_shift larger than 6?
> I am basically thinking about this optimization:
> B = B * ( 1L << ( 6 - CUR.GS.delta_shift ) );
I think I found the answer:
"The legal range for delta shift is zero through six. Negative values
are illegal."
from
https://developer.apple.com/fonts/TrueType-Reference-Manual/RM04/Chap4.html#delta%20shift