Re: [Bug?] Text rendering under Cocoa

FROM : Aki Inoue
DATE : Tue Nov 12 20:42:11 2002

Marco,

This is a known issue with pre-OS X AAT fonts that have ligatures
designed for QD GX turned on by default.
AppKit has a workaround not to show this issue, but ATSUI apps are
affected by this problem.

Aki

On 2002.11.12, at 10:15  AM, Marco Binder wrote:

> Has no one ever noticed this weird bug, when an "o" followed by an "/"
> gives this overlapped glyph "x" (pretty sure you wont see that one
> here in the list). Well you know, this skandinavic umlaut, the striked
> "o". Backspace deletes only the "/" part of the thing, so its
> definitly two seperate characters just placed right ontop of each
> other. It happens for me in Terminal with Monaco selected.
>
> It also happened in other apps with Palatino (i think, or Bookman).
> Very strange. I couldnt track it down (ok, I havent spend too much
> effort to do so).
>
> marco
>
>
> Am Dienstag, 12.11.02 um 17:46 Uhr schrieb Rakesh Pandey:
>
>> This occurs with a few more fonts try to type 'gg' and change the
>> font to
>> 'Papyrus' and  size to 288.  See the first 'g' is chopped off ,
>> moreover
>> they overlap too.
>>
>> It happens with a few more fonts but with different characters.
>>
>> Regards
>> Rakesh
>>
>> On 11/12/02 10:05 PM, "Ondra Cada" <<email_removed>> wrote:
>>
>>> On Tuesday, November 12, 2002, at 05:00 , Stiphane Sudre wrote:
>>>
>>>> Is this a known bug that when you try to draw a huge 'j' letter
>>>> with the
>>>> AppKit, you get an improper result.
>>>
>>> Do you? I don't.
>>>
>>>> Example:
>>>>
>>>> 1) Launch TextEdit.app
>>>> 2) Type: JJoy of Tech
>>>> 3) Select the text and set the font to be Lucida Grande 288.
>>>>
>>>> And then compare the J on the left to its neighbour. Looks like the
>>>> first
>>>> J is on horizontal diet.
>>>
>>> When I try here (10.1.5), I get both J's exactly the same; only with
>>> Lucida Grande there seems to be a metric problem, which causes the
>>> left
>>> edge of the J to be somewhat into the letter, actually. Just try
>>> that, try
>>> also to place a space (or even better a letter, say, 'a') before the
>>> first
>>> J, and also try to select the J.
>>>
>>>> We're seeing this bug with [NSString drawAtPoint: withAttributes:];
>>>> too.
>>>> Do I need to file a bug report or is this a known issue (which is
>>>> also in
>>>> 10.1 AFAIK)?
>>>
>>> Can't say for sure, but this definitely looks as a specific problem
>>> of the
>>> metrics inside the Lucida Grande font (no such problem with
>>> Helvetica or
>>> Times; I haven't tried others). I haven't slightest idea whether it
>>> was
>>> reported or not.
>>> ---
>>> Ondra Cada
>>> OCSoftware:    <email_removed>              http://www.ocs.cz
>>> private        <email_removed>            http://www.ocs.cz/oc
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> --
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