[Interest] Fonts not rendering!
Lata Agrawal
lata.agrawal at enrouteinc.com
Fri Jun 29 10:47:31 CEST 2012
Sorry for the previous message, sent it by mistake.
Regards,
Lata
On 29 June 2012 14:15, Lata Agrawal <lata.agrawal at enrouteinc.com> wrote:
> without network connection.
>
> On 28 June 2012 09:10, Lata Agrawal <lata.agrawal at enrouteinc.com> wrote:
>
>> Thanks Atlant for the time and info you have provided here. I will follow
>> what you have recommended and hopefully be able to solve the problem.
>>
>> Thanks again and best regards,
>> Lata
>>
>>
>> On 28 June 2012 00:33, Atlant Schmidt <aschmidt at dekaresearch.com> wrote:
>>
>>> Lata:
>>>
>>> ****
>>>
>>> Desktop > grep -i 'q[sp]f' QScrollLabelLog.txt****
>>>
>>> stat64("/tmp/qtembedded-0//fonts/dejavu_sans_12_75.qsf",
>>> {st_mode=S_IFREG|0644, st_size=17284, ...}) = 0****
>>>
>>> stat64("/tmp/qtembedded-0//fonts/dejavu_sans_12_50.qsf",
>>> {st_mode=S_IFREG|0644, st_size=18600, ...}) = 0****
>>>
>>> unlink("/tmp/qtembedded-0//fonts/dejavu_sans_12_50.qsf") = 0****
>>>
>>> unlink("/tmp/qtembedded-0//fonts/dejavu_sans_12_75.qsf") = 0****
>>>
>>> ** **
>>>
>>> access("/tmp/qtembedded-0//fonts/dejavu_sans_12_50.qsf", F_OK) = -1
>>> ENOENT (No such file or directory)****
>>>
>>> open( "/tmp/qtembedded-0//fonts/dejavu_sans_12_50.qsf",
>>> O_RDWR|O_CREAT|O_EXCL|O_LARGEFILE, 0644) = 13****
>>>
>>> write( 13, "QPF2\0\0\0\0\2\0\0\324\0\0\0\vDejaVu Sans\0\1\0H/"...,
>>> 16596) = 16596****
>>>
>>> ** **
>>>
>>> access("/tmp/qtembedded-0//fonts/dejavu_sans_12_75.qsf", F_OK) = -1
>>> ENOENT (No such file or directory)****
>>>
>>> open( "/tmp/qtembedded-0//fonts/dejavu_sans_12_75.qsf",
>>> O_RDWR|O_CREAT|O_EXCL|O_LARGEFILE, 0644) = 14****
>>>
>>> write( 14, "QPF2\0\0\0\0\2\0\0\330\0\0\0\vDejaVu Sans\0\1\0M/"...,
>>> 16588) = 16588****
>>>
>>> ** **
>>>
>>> In general, this looks like the right stuff is going on. It indicates
>>> that Qt has opened the temporary cache file (.qsf in this case)
>>> for the Déjà vu sans-serif font in the 12 point size for both
>>> the regular (‘50’) and bold (‘75’) weights.****
>>>
>>>
>>> It wrote quite a bit of data to each file so probably all the
>>> correct header stuff and **MAYBE** the rendering of the
>>> first few glyphs.****
>>>
>>> ** **
>>>
>>> I’m not sure where you should go next, but maybe it’s time
>>> to consider whether things like text color and transparency are
>>> correct (so that you’d actually be able to see the text drawn on
>>> the buttons).****
>>>
>>> ** **
>>>
>>> It **IS** possible, by the way, to decode what’s in one of these
>>> .QPF/.qsf files. I have a Perl script that does this but I’m afraid my
>>> management wouldn’t agree to share it, but I know you could do the
>>> same reverse-engineering that I did. Try dumping the file with a
>>> variety
>>> of printout widths and you should eventually see the bitmaps of your
>>> rendered characters****
>>>
>>> ** **
>>>
>>> Note that the character bitmaps are stored in the .QPF/.qsf file only
>>> once and in the exact same order as they were first used by you, so
>>> if your button contained the text “Hello, world from Atlant!”, the
>>> glyphs in the file would be in the following order:****
>>>
>>> ** **
>>>
>>> Helo,wrdfmAtlan!****
>>>
>>> ** **
>>>
>>> In the file, the glyphs vary in width depending on the font metrics
>>> but they are always an even (or even multiple of 4?) in width.****
>>>
>>> ** **
>>>
>>> Atlant****
>>>
>>> ** **
>>>
>>> ** **
>>>
>>> *From:* Lata Agrawal [mailto:lata.agrawal at enrouteinc.com]
>>> *Sent:* Wednesday, June 27, 2012 2:09 PM
>>> *To:* Atlant Schmidt
>>> *Cc:* Konstantin Tokarev; interest at qt-project.org
>>>
>>> *Subject:* Re: [Interest] Fonts not rendering!****
>>>
>>> ** **
>>>
>>> Atlant, Thanks for replying.
>>>
>>> I checked strace according to which .qpf files are created at
>>> /tmp/qtembedded-0//fonts on my device. Qt app is also able to access the
>>> temporarily created font files.
>>> Can you please go through the strace (attached here) and suggest whats
>>> possibly gone wrong?
>>>
>>> Regards,
>>> Lata****
>>>
>>> On 27 June 2012 21:15, Atlant Schmidt <aschmidt at dekaresearch.com> wrote:
>>>
>>> ****
>>>
>>> Lata:****
>>>
>>> ****
>>>
>>> When your app is running, Qt should produce temporary .qpf files
>>> in your system’s fonts folder (for example,
>>> /usr/lib/fonts/helvetica_100_50.qpf).
>>> These represent a cache of glyphs that Qt has already rendered from
>>> the scalable font file. (In the case of my example, the Helvetica font
>>> rendered at 10.0 points, normal weight.)****
>>>
>>> ****
>>>
>>> See if these files are there; that may give you some clue as to how
>>> far font processing got.****
>>>
>>> ****
>>>
>>> Atlant****
>>>
>>> ****
>>>
>>> ****
>>>
>>> *From:* interest-bounces+aschmidt=dekaresearch.com at qt-project.org[mailto:
>>> interest-bounces+aschmidt=dekaresearch.com at qt-project.org] *On Behalf
>>> Of *Lata Agrawal
>>> *Sent:* Wednesday, June 27, 2012 11:12 AM
>>> *To:* Konstantin Tokarev
>>> *Cc:* interest at qt-project.org
>>> *Subject:* Re: [Interest] Fonts not rendering!****
>>>
>>> ****
>>>
>>> In configure command for QT, I have used -qt-freetype. That should build
>>> freetype support, right?****
>>>
>>> On 27 June 2012 20:38, Konstantin Tokarev <annulen at yandex.ru> wrote:****
>>>
>>>
>>> 27.06.2012, 19:06, "Lata Agrawal" <lata.agrawal at enrouteinc.com>:****
>>>
>>> > Hi,
>>> >
>>> > I am working with an Embedded Linux/MIPS device. It has qt-4.6.2 libs
>>> compiled using gcc-4.2.4 installed on it. LD_LIBRARY_PATH is set
>>> appropriately.
>>> >
>>> > I tried running a simple QT app with a button on device. The app runs
>>> fine but the text on button is not showing. I also executed the same app
>>> with strace (log attached here). In strace log, app appears to find the
>>> fonts in <QTDIR>/lib/fonts folder but still it is not rendering the text.
>>> > When I execute the same app on similar device having Qt-4.6.2 libs
>>> compiled using gcc-3.4.4, it shows the text properly.
>>> >
>>> > Can someone please check the strace and help me find out the reason
>>> for fonts not rendering?****
>>>
>>> Do you build Qt with freetype? If not, you need fonts to be rasterized
>>> to qpf2 format.
>>>
>>> --
>>> Regards,
>>> Konstantin****
>>>
>>>
>>>
>>>
>>> --
>>> *
>>> *Lata Agrawal
>>> 9699750643
>>> En Route Media Pvt. Ltd.
>>>
>>> *Winner of 'Innovative Creation of a New Medium' at the E4M & N2M
>>> Awards 2012*
>>> * *
>>>
>>> ****
>>>
>>> Click here <https://www.mailcontrol.com/sr/wQw0zmjPoHdJTZGyOCrrhg==> to
>>> report this email as spam.****
>>>
>>> ** **
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>>>
>>>
>>> --
>>> *
>>> *Lata Agrawal
>>> 9699750643
>>> En Route Media Pvt. Ltd.
>>>
>>> *Winner of 'Innovative Creation of a New Medium' at the E4M & N2M
>>> Awards 2012*
>>> * *****
>>>
>>> ------------------------------
>>> 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
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>>> Thank you.
>>>
>>> Please consider the environment before printing this email.
>>>
>>
>>
>>
>> --
>> *
>> *Lata Agrawal
>> 9699750643
>> En Route Media Pvt. Ltd.
>>
>> *Winner of 'Innovative Creation of a New Medium' at the E4M & N2M Awards
>> 2012*
>> * *
>>
>>
>
>
> --
> *
> *Lata Agrawal
> 9699750643
> En Route Media Pvt. Ltd.
>
> *Winner of 'Innovative Creation of a New Medium' at the E4M & N2M Awards
> 2012*
> * *
>
>
--
*
*Lata Agrawal
9699750643
En Route Media Pvt. Ltd.
*Winner of 'Innovative Creation of a New Medium' at the E4M & N2M Awards
2012*
* *
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