freetype-devel
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [ft-devel] ttinterp.c optimization


From: Werner LEMBERG
Subject: Re: [ft-devel] ttinterp.c optimization
Date: Wed, 27 Aug 2014 06:42:30 +0200 (CEST)

> Furthermore, it turns out that MPS instruction is *very* *very*
> common.  Why do we call CURRENT_Ppem here?  The comment suggest that
> the decision was arbitrary and, perhaps, wasteful.  I see a huge
> number of trivial FT_MulFix's by 1.0 still.

Measuring ppem and pt values are done along the projection vector, so
they *must* be recomputed each time since this value can change any
time.  However, it certainly makes sense to catch factor `1.0'
explicitly instead of performing a multiplication.  So please
optimize :-)


    Werner

reply via email to

[Prev in Thread] Current Thread [Next in Thread]