Font rendering bug on some Android devices!?

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...