[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [ft-devel] Artefacts when rendering with FreeType 2.4.9
From: |
Werner LEMBERG |
Subject: |
Re: [ft-devel] Artefacts when rendering with FreeType 2.4.9 |
Date: |
Wed, 13 Jun 2012 15:22:04 +0200 (CEST) |
> Do you understand the Rx calculations?
Not without a lot of time to introduce myself to the code :-)
> They are wrong if integer overflows, aren't they?
Yes, it seems so, but up to now we haven't had a bug report.
> So there will be artifacts, possibly very small ones, when
> SMulDiv_NoRound becomes necessary. Aren't we overthinking here?
> Does Ftgrays avoid FT_MulDiv by splitting long lines?
It's probably a good idea to fix Rx also. What about this:
old:
Rx = ( ras.precision * Dx ) % Dy;
new:
Rx = ( ( ras.precision % Dy ) * ( Dx % Dy ) ) % Dy;
Werner
- Re: [ft-devel] Artefacts when rendering with FreeType 2.4.9, Alexei Podtelezhnikov, 2012/06/01
- Re: [ft-devel] Artefacts when rendering with FreeType 2.4.9, jola, 2012/06/04
- Re: [ft-devel] Artefacts when rendering with FreeType 2.4.9, Alexei Podtelezhnikov, 2012/06/05
- Re: [ft-devel] Artefacts when rendering with FreeType 2.4.9, jola, 2012/06/05
- Re: [ft-devel] Artefacts when rendering with FreeType 2.4.9, Alexei Podtelezhnikov, 2012/06/05
- Re: [ft-devel] Artefacts when rendering with FreeType 2.4.9, jola, 2012/06/06
- Re: [ft-devel] Artefacts when rendering with FreeType 2.4.9, Werner LEMBERG, 2012/06/06
- Re: [ft-devel] Artefacts when rendering with FreeType 2.4.9, Alexei Podtelezhnikov, 2012/06/06
- Re: [ft-devel] Artefacts when rendering with FreeType 2.4.9,
Werner LEMBERG <=
- Re: [ft-devel] Artefacts when rendering with FreeType 2.4.9, Alexei Podtelezhnikov, 2012/06/13
- Re: [ft-devel] Artefacts when rendering with FreeType 2.4.9, Werner LEMBERG, 2012/06/13