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bug#15138: Font selection error on OSX
From: |
Michael Toomim |
Subject: |
bug#15138: Font selection error on OSX |
Date: |
Sun, 1 Sep 2013 11:51:34 -0700 |
Fantastic! I will try it out and let you know.
On Sep 1, 2013, at 3:00 AM, Jan Djärv <jan.h.d@swipnet.se> wrote:
> Hello.
>
> I've made a fix for this in the trunk, please try it.
>
> Thanks,
>
> Jan D.
>
> 28 aug 2013 kl. 06:55 skrev Jan Djärv <jan.h.d@swipnet.se>:
>
>> Hi.
>>
>> 27 aug 2013 kl. 21:08 skrev Michael Toomim <toomim@cs.washington.edu>:
>>
>>> That sounds very strange indeed! Thank you very much for investigating
>>> this. Where in the source are you looking?
>>>
>>
>> Just tracing calls and parameters to functions in nsfont_driver in nsfont.m.
>>
>> Jan D.
>>
>>> On Aug 27, 2013, at 8:59 AM, Jan Djärv <jan.h.d@swipnet.se> wrote:
>>>
>>>> Hello.
>>>>
>>>> This seems to be in the general font code. It does not even try to check
>>>> if that glyph is present in the current font (it is), but instead asks for
>>>> a font with script symbol. The logic seems strange to me.
>>>>
>>>> Jan D.
>>>>
>>>> 26 aug 2013 kl. 18:14 skrev Jan Djärv <jan.h.d@swipnet.se>:
>>>>
>>>>> Hello.
>>>>>
>>>>> 20 aug 2013 kl. 04:44 skrev Michael Toomim <toomim@cs.washington.edu>:
>>>>>
>>>>>> A simple way to reproduce this bug is to press option-8 (inserts a
>>>>>> bullet on a mac) anywhere in a text buffer. You can see the line grow
>>>>>> taller.
>>>>>>
>>>>>> In default OSX settings, you'll need to (setq ns-alternate-modifier
>>>>>> 'none) before you can use option-8.
>>>>>
>>>>> It is strictly not a font rendering error, but a font selection error.
>>>>> The bullet is from a different font than the surrounding text.
>>>>>
>>>>> Jan D.
>>>>>
>>>>>> On Aug 19, 2013, at 7:37 PM, Michael Toomim <toomim@gmail.com> wrote:
>>>>>>
>>>>>>> Some extended characters are rendered incorrectly in the new Cocoa 24.3
>>>>>>> emacs on OSX. They are rendered:
>>>>>>> - too small
>>>>>>> - too tall (forcing an increase in line-height of a pixel or two)
>>>>>>>
>>>>>>> The result is that some lines are too tall, and monospace layouts (like
>>>>>>> ASCII art) lose alignment.
>>>>>>>
>>>>>>> Here is an example in three screenshots, where the "•" bullet character
>>>>>>> is rendered incorrectly. The first screenshot shows the bug on the
>>>>>>> current release. You can see that the center line takes up too much
>>>>>>> vertical space, and not enough horizontal space. This is a monospace
>>>>>>> font (apple monaco).
>>>>>>>
>>>>>>> The second and third show the correct rendering. The second is an older
>>>>>>> emacs build I have that rendered text with Carbon. The third is Apple's
>>>>>>> native TextEdit.app, for reference.
>>>>>>>
>>>>>>>
>>>>>>> <PastedGraphic-21.png>
>>>>>>> <PastedGraphic-19.png>
>>>>>>> <PastedGraphic-20.png>
>>>>>
>>
>
bug#15138: Font selection error on OSX, Michael Toomim, 2013/09/02