[Interest] Fonts not rendering!

[Lata Agrawal]

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*
>> *                                 *
>>
>> ****
>>
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>> 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
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>>
>> Please consider the environment before printing this email.
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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*
> *                                 *
>
>


-- 
*
*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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