[Qt-interest] Random load glyph error

[Josh]

Hello all,

So far I only saw the error once and hasn't appeared again that I know of. 
I'll keep watching the output to look for the error and see if I can 
figure out which font/characters it is related to. I haven't seen anything 
wrong with how text is displayed yet, but I display a lot of complex 
(Hebrew) text with my application and so I could have easily missed 
something. I'm using 4.7 beta at the moment.

Josh

> Folks:
>
>> I need to conduct a further experiment where I let the
>> system fall back even further to the DejaVu Sans TrueType
>> fonts.
>
>  Further testing reveals that neither problem that I
>  described (misplaced "u"s and the "load glyph failed"
>  error messages) occurs when I use the DejaVu Sans
>  TruType font.
>
>  For us, the problem seems to only be provoked when we
>  use the Luxi Sans TrueType font(s).
>
>                           Atlant
>
> -----Original Message-----
> From: qt-interest-bounces at trolltech.com [mailto:qt-interest-bounces at trolltech.com] On Behalf Of Atlant Schmidt
> Sent: Thursday, August 05, 2010 8:19 AM
> To: Josh; qt-interest at trolltech.com
> Subject: Re: [Qt-interest] Random load glyph error
>
> Josh:
>
>  I don't have a solution for you, but since we've
>  been attempting to upgraded to Qt 4.6.3, we've
>  been routinely seeing that error message as well.
>
>  It's deterministic in that a fixed number of these
>  messages appear when we display certain screens in
>  our app.
>
>  For us, the glyphs complained about are 832 and 960
>  (the Unicode "Accent Grave 'dead-key'" and the "Pi"
>  Symbol), but as far as I know, we never use either
>  of those code-points at all and certainly don't use
>  them on the screens which produce the messages.
>
>  We see another symptom as well: on one of our
>  screens (an application failure screen), all of
>  the lower-case "u"s in that message are displaced
>  downwards so the tops of the "u"s more-or-less
>  align with the baseline of the text.*
>
>  For us, both of these symptoms only appear when
>  we're using our Luxi Sans TrueType font; they
>  *DON'T* appear when we let the system fall-back
>  to a Luxi Sans Postscript Type 1 font.**,***.
>
>  How does this match-up with your application?
>
>  I've tried to write a simple reproducer but failed
>  utterly; everything my reproducer tries (including
>  using that exact same typeface as used on our error
>  screen and in the correct size and weight) works
>  fine. Proper subscripts work fine as well.
>
>  For us, this problem is a show-stopper for moving
>  to Qt 4.6.3. We could work-around some of the problem
>  by not using the TrueType Luxi Sans fonts, but we
>  also have an Asian font and (AFAIK) that's only
>  available to us a TrueType, not Postscript Type 1.
>
>                    Atlant
>
>
>
> *  They're not proper Qt subscripts because they aren't
>    reduced in height at all (whereas Qt subscripts are
>    reduced to 1/2 height) and they're displaced too far
>    downwards (whereas Qt subscripts are displaced downwards
>    by 1/6 of the line's full height).
>
> ** When the .ttf Luxi Sans fonts are in use, Qt generates
>    .qsf files in the /tmp/qtembedded-0/fonts/ folder. When
>    the PS1 versions of the fonts are in use, the .qsf files
>    aren't generated. This surprised me somewhat.
>
> *** I need to conduct a further experiment where I let the
>    system fall back even further to the DejaVu Sans TrueType
>    fonts.
>
>
> -----Original Message-----
> From: qt-interest-bounces at trolltech.com [mailto:qt-interest-bounces at trolltech.com] On Behalf Of Josh
> Sent: Wednesday, August 04, 2010 17:46 PM
> To: qt-interest at trolltech.com
> Subject: [Qt-interest] Random load glyph error
>
> Hello all,
>
> I got this error message from my Qt only program and was wondering if
> anyone could help me track it down. Does anyone know how to figure out
> which font and glyph these numbers refer to? I'm assuming this error is in
> either the font or Qt... Thanks for any help.
>
> load glyph failed err=6 face=0x2cb0f10, glyph=4160
>
> Thanks for any pointers!
>
> Josh
> _______________________________________________
> Qt-interest mailing list
> Qt-interest at trolltech.com
> http://lists.trolltech.com/mailman/listinfo/qt-interest
>
> This e-mail and the information, including any attachments, it contains are intended to be a confidential communication only to the person or entity to whom it is addressed and may contain information that is privileged. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender and destroy the original message.
>
> Thank you.
>
> Please consider the environment before printing this email.
>
> _______________________________________________
> Qt-interest mailing list
> Qt-interest at trolltech.com
> http://lists.trolltech.com/mailman/listinfo/qt-interest
>
> This e-mail and the information, including any attachments, it contains are intended to be a confidential communication only to the person or entity to whom it is addressed and may contain information that is privileged. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender and destroy the original message.
>
> Thank you.
>
> Please consider the environment before printing this email.
>