Font rendering bug on some Android devices!?

Xander84

I still have some users complaining about this bug, I hope this gets fixed with Qt 5.3. :/

Another screenshot from a user using Samsung Galaxy 3 running CM11:
!http://i.imgur.com/GIzIYFZ.png(font bug)!

Same thing reported from a user running Samsung Galaxy 3 on Android version 4.3.

I don't know if that is only happening only samsung devices, but i know some users have no problems on samsung devices and I still can't reproduce this bug.. :(
From what I can see mostly bold text is affected, very weird, I have one screenshot in landscape mode where normal text is affected too so it's not only bold text but if you look at there screens here it's happening with bold font.

Anyone have any idea or can maybe test the app on their device? Here is the Google play link: https://play.google.com/store/apps/details?id=ws.aggregator.critiq

broulik

I also just got a bugreport from a user with a Sony Xperia TS running Android 4.3 that fonts are broken. At the moment I'm using a plain Text element with font.family set to Roboto and shipping the Roboto font with the app to workaround a HTC rendering bug.

There have been a lot of fixes for text rendering on Android recently and I hope that one is among them :/

I'm getting more and more reports of people with broken font rendering (so far various Huawei (P2, P6) devices, Sony Xperia TS, HTC One S (however I cannot reproduce it on that device)...

Xander84

Hi, yeah I know the worst is we can't reproduce the bug ourselves and test possible fixes for it. :/

Another user send me a possible workaround, I have set the QML environment variable QML_USE_GLYPHCACHE_WORKAROUND to 1, that should work for some devices, but again I can't test it myself so it's hard to say.

qputenv("QML_USE_GLYPHCACHE_WORKAROUND", QByteArray("1"));

that workaround was described here: https://bugreports.qt-project.org/browse/QTBUG-34984

I think most rendering bugs are due to corrupt device drivers for OpenGL, but there is nothing we can do about it I guess.

broulik

I just got feedback from a user that Qt 5.3 fixes the issue for him on his Sony Xperia T, I hope it will work on Huawei and the others too. Stay tuned :)

Xander84

Great, I am waiting fort the stable release of Qt 5.3, but if that fixes the font problems that would be nice. :)

onek24

Greetings,

i have a font rendering bug under windows which doesn't exist on android-devices... strange QML. :)

jiangcaiyang

I usually use native font "Droid Sans" when building Android application. It is so far so good.

Xander84

For my app I did not specify any font explicitly, so it should use the default device font I think ( Roboto on Android?). It looked good on my devices so I thought it would be best not to set any font family at all.
[quote author="jiangcaiyang" date="1399629141"]I usually use native font "Droid Sans" when building Android application. It is so far so good.[/quote]

mehrdad

Hi
how can i set the QML environment variable QML_USE_GLYPHCACHE_WORKAROUND to 1?

p3c0

@mehrdad Using qputenv. Call this before loading the QML.

mehrdad

thanks, it work for huawei p6 but not for textfiled element...

p3c0

@mehrdad Well the bug report https://bugreports.qt-project.org/browse/QTBUG-34984 (posted by @Xander84 here) says it is fixed. Which Qt version are you using ?

mehrdad

5.4.1
i use textEdit for create my own textField and it work!
thanks...