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Re: [ft-devel] New `slight' auto-hinting mode
From: |
Alexei Podtelezhnikov |
Subject: |
Re: [ft-devel] New `slight' auto-hinting mode |
Date: |
Wed, 3 May 2017 19:31:28 -0400 |
On Wed, May 3, 2017 at 7:16 PM, Alexei Podtelezhnikov
<address@hidden> wrote:
>>> Maybe. I am talking about width as in bounding box that may and
>>> will change if you shift and hint.
>>
>> I don't understand this your paragraph. Please reformulate.
>
> Yes. This is really important. In subpixel positioning you have to
> shift glyph to take into account previous fractional advance. If you
> follow that by hinting, the result is not deterministic. The bounding
> box may differ by 1 pixel. Warping is more stable basically because
> its shift will undo some of the original shift.
Here is an example two stems shifted but with the same spacing
[0 64] [260 324]
[30 94] [290 354]
after hinting
[0 64] [256 320]
[0 64] [320 384]
This is ugly! Forget hinting in the context of subpixel positioning.
Nothing better than lsb_ and rsb_delta exists,
- Re: [ft-devel] New `slight' auto-hinting mode, (continued)
- Re: [ft-devel] New `slight' auto-hinting mode, Nikolaus Waxweiler, 2017/05/03
- Re: [ft-devel] New `slight' auto-hinting mode, Nikolaus Waxweiler, 2017/05/03
- Re: [ft-devel] New `slight' auto-hinting mode, Werner LEMBERG, 2017/05/03
- Re: [ft-devel] New `slight' auto-hinting mode, Alexei Podtelezhnikov, 2017/05/03
- Re: [ft-devel] New `slight' auto-hinting mode, Werner LEMBERG, 2017/05/03
- Re: [ft-devel] New `slight' auto-hinting mode, Alexei Podtelezhnikov, 2017/05/03
- Re: [ft-devel] New `slight' auto-hinting mode, Werner LEMBERG, 2017/05/03
- Re: [ft-devel] New `slight' auto-hinting mode, Alexei Podtelezhnikov, 2017/05/03
- Re: [ft-devel] New `slight' auto-hinting mode, Werner LEMBERG, 2017/05/03
- Re: [ft-devel] New `slight' auto-hinting mode, Alexei Podtelezhnikov, 2017/05/03
- Re: [ft-devel] New `slight' auto-hinting mode,
Alexei Podtelezhnikov <=
- Re: [ft-devel] New `slight' auto-hinting mode, Werner LEMBERG, 2017/05/04
- Re: [ft-devel] New `slight' auto-hinting mode, Alexei Podtelezhnikov, 2017/05/04
- Re: [ft-devel] New `slight' auto-hinting mode, Werner LEMBERG, 2017/05/15
- Re: [ft-devel] New `slight' auto-hinting mode, Alexei Podtelezhnikov, 2017/05/15
- Re: [ft-devel] New `slight' auto-hinting mode, Werner LEMBERG, 2017/05/16
- Re: [ft-devel] New `slight' auto-hinting mode, Alexei Podtelezhnikov, 2017/05/16
- Re: [ft-devel] New `slight' auto-hinting mode, Werner LEMBERG, 2017/05/18
- Re: [ft-devel] New `slight' auto-hinting mode, Alexei Podtelezhnikov, 2017/05/18
Re: [ft-devel] New `slight' auto-hinting mode, Werner LEMBERG, 2017/05/01
Re: [ft-devel] New `slight' auto-hinting mode, Hin-Tak Leung, 2017/05/03