Kerning messed up for Minion Pro in ConTeXt 2010.06.09

Kerning messed up for Minion Pro in ConTeXt 2010.06.09

[Michael Murphy]

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Hi all,

it looks like the kerning has gone weird for Minion Pro in the latest 
ConTeXt (this is the only font I could find with the problem, all others 
looked fine). I've attached a PDF to show the effect.

-- 
Michael Murphy

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Re: Kerning messed up for Minion Pro in ConTeXt 2010.06.09

[Mojca Miklavec]

On Wed, Jun 9, 2010 at 18:36, Michael Murphy wrote:
>
> it looks like the kerning has gone weird for Minion Pro in the latest
> ConTeXt (this is the only font I could find with the problem, all others
> looked fine). I've attached a PDF to show the effect.

Just a blind guess. Some Adobe fonts use "kerning groups" (a set of
characters with equal kerning on left/right), while most fonts, in
particular all the Polish fonts/LM use just "normal kerning" (kerning
defined for each pair of characters). I suspect that only kerning of
"group of characters" might be broken.

Mojca
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Re: Kerning messed up for Minion Pro in ConTeXt 2010.06.09

[Hans Hagen]

On 9-6-2010 10:59, Mojca Miklavec wrote:
> On Wed, Jun 9, 2010 at 18:36, Michael Murphy wrote:
>>
>> it looks like the kerning has gone weird for Minion Pro in the latest
>> ConTeXt (this is the only font I could find with the problem, all others
>> looked fine). I've attached a PDF to show the effect.
>
> Just a blind guess. Some Adobe fonts use "kerning groups" (a set of
> characters with equal kerning on left/right), while most fonts, in
> particular all the Polish fonts/LM use just "normal kerning" (kerning
> defined for each pair of characters). I suspect that only kerning of
> "group of characters" might be broken.

test code needed

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                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
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Re: Kerning messed up for Minion Pro in ConTeXt 2010.06.09

[Bernhard Rosensteiner]

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Am 10.06.2010 um 10:32 schrieb Hans Hagen:

> On 9-6-2010 10:59, Mojca Miklavec wrote:
>> On Wed, Jun 9, 2010 at 18:36, Michael Murphy wrote:
>>> 
>>> it looks like the kerning has gone weird for Minion Pro in the latest
>>> ConTeXt (this is the only font I could find with the problem, all others
>>> looked fine). I've attached a PDF to show the effect.
>> 
>> Just a blind guess. Some Adobe fonts use "kerning groups" (a set of
>> characters with equal kerning on left/right), while most fonts, in
>> particular all the Polish fonts/LM use just "normal kerning" (kerning
>> defined for each pair of characters). I suspect that only kerning of
>> "group of characters" might be broken.
> 
> test code needed




how exactly should the test code look like? to reproduce it one needs the adobe fonts.
Here are links to my testing of the adobe opticals:

http://dl.dropbox.com/u/2082519/Typescript_Test.pdf
http://dl.dropbox.com/u/2082519/Typescript_Test.log

Probably this does not help much but shows that the problem is not only with minion pro.

best regards
Bernhard


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Re: Kerning messed up for Minion Pro in ConTeXt 2010.06.09

[Hans Hagen]

On 10-6-2010 1:57, Bernhard Rosensteiner wrote:
> Am 10.06.2010 um 10:32 schrieb Hans Hagen:
>
>> On 9-6-2010 10:59, Mojca Miklavec wrote:
>>> On Wed, Jun 9, 2010 at 18:36, Michael Murphy wrote:
>>>>
>>>> it looks like the kerning has gone weird for Minion Pro in the latest
>>>> ConTeXt (this is the only font I could find with the problem, all others
>>>> looked fine). I've attached a PDF to show the effect.
>>>
>>> Just a blind guess. Some Adobe fonts use "kerning groups" (a set of
>>> characters with equal kerning on left/right), while most fonts, in
>>> particular all the Polish fonts/LM use just "normal kerning" (kerning
>>> defined for each pair of characters). I suspect that only kerning of
>>> "group of characters" might be broken.
>>
>> test code needed
>
>
>
>
> how exactly should the test code look like? to reproduce it one needs the adobe fonts.
> Here are links to my testing of the adobe opticals:
>
> http://dl.dropbox.com/u/2082519/Typescript_Test.pdf
> http://dl.dropbox.com/u/2082519/Typescript_Test.log

i reverted a change and not works ok, the problem is that we have to use 
a depricated (bit unreliable) lua function and i'd changes the code; 
however this is also unreliable ... a future version of luatex will 
circumvent this

Hans



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                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
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