Re: [Vala] Vala to Android - Cairo
Very good results. But why the Android device is needed to be rooted? And is it possible to use OpenGLES in Vala there? Tal From: tarn...@tarnyko.net To: vala-list@gnome.org Date: Mon, 1 Apr 2013 06:10:40 +0200 Subject: Re: [Vala] Vala to Android - Cairo Hi people, Last message from myself on this thread, just to let you know that I made a tutorial for using Cairo on Android - from Vala : http://www.tarnyko.net/en/?q=node/26 So we can now draw shapes, text, images... and all sort of nice things on Android's screen from Vala code. More interesting stuff in this style will come later, working on this. Regards, Tarnyko ___ vala-list mailing list vala-list@gnome.org https://mail.gnome.org/mailman/listinfo/vala-list ___ vala-list mailing list vala-list@gnome.org https://mail.gnome.org/mailman/listinfo/vala-list
Re: [Vala] Vala to Android - Cairo
Hi Tal, thanks for your interest, Tal Hadad writes: Very good results. But why the Android device is needed to be rooted? Well, during my tutorial, I speed up things by directly copying the native binary deep in the phone's internal filesystem ; I think you are not allowed to do that with an unrooted phone. A solution -not requiring root- would be to regenerate and reinstall the whole APK each time you recompile stuff. But the tutorial would have been a hell longer (explanations on SDK, APK, a.s.o.) so I decided to concentrate on core Vala things. And is it possible to use OpenGLES in Vala there? Potentially, yes. By using the SDL Android port, which has support for ES 1.1 and 2.0 (see http://bugzilla.libsdl.org/show_bug.cgi?id=1291). Vala has already a SDL VAPI, we just need to recompile libs and write some glue code, like I did here for Cairo. I'm just too busy to do this right now. Tal From: tarn...@tarnyko.net To: vala-list@gnome.org Date: Mon, 1 Apr 2013 06:10:40 +0200 Subject: Re: [Vala] Vala to Android - Cairo Hi people, Last message from myself on this thread, just to let you know that I made a tutorial for using Cairo on Android - from Vala : http://www.tarnyko.net/en/?q=node/26 So we can now draw shapes, text, images... and all sort of nice things on Android's screen from Vala code. More interesting stuff in this style will come later, working on this. Regards, Tarnyko ___ vala-list mailing list vala-list@gnome.org https://mail.gnome.org/mailman/listinfo/vala-list ___ vala-list mailing list vala-list@gnome.org https://mail.gnome.org/mailman/listinfo/vala-list ___ vala-list mailing list vala-list@gnome.org https://mail.gnome.org/mailman/listinfo/vala-list
Re: [Vala] Vala to Android - Cairo
Hi people, Last message from myself on this thread, just to let you know that I made a tutorial for using Cairo on Android - from Vala : http://www.tarnyko.net/en/?q=node/26 So we can now draw shapes, text, images... and all sort of nice things on Android's screen from Vala code. More interesting stuff in this style will come later, working on this. Regards, Tarnyko ___ vala-list mailing list vala-list@gnome.org https://mail.gnome.org/mailman/listinfo/vala-list
Re: [Vala] Vala to Android - Cairo
OK, I'm posting it mostly for the record, please note it is a long mail.
Feel free to ask questions. Here we go.
I found some pre-compiled versions of Cairo for Android on the Internet ;
none of them was complete (with dependencies) nor usable with agcc/valac.
So, after struggling a bit...
Cairo 1.10.2 for Android :
http://www.tarnyko.net/repo/cairo-1.10.2-android-(TARNYKO).tar.bz2
Here is a stand-alone Vala sample :
http://www.tarnyko.net/repo/cairo.vala
to be compiled with :
valac --cc=agcc --pkg cairo -o cairo cairo.vala --Xcc=-lpixman-1
--Xcc=-lpng15
It blits a image.png file with some overlay text. Should run fine on an
Android phone.
Next step is to display this stuff to Android's screen, and here we have
a problem ; by design, the OS doesn't allow native code to draw to screen.
Any data should be passed between a native library (*.so) and a running Java
app. So I will use AndroidBitmapInfo from JNI as a vector.
I've prepared a demo project :
http://www.tarnyko.net/repo/cairo-android-vala.tar.bz2
contains :
android.vapi : Android VAPI (dummy)
cairo-android.vala : Vala source
cairo-android.glue.c : C Android Glue
should be compiled with :
valac --cc=agcc -X -shared --pkg cairo --pkg android --vapidir .
cairo-android.vala cairo-android.glue.c -o libcairo-android.so
--Xcc=-lpixman-1 --Xcc=-lpng15 --Xcc=-ljnigraphics
and drops a libcairo-android.so file which you can call from Java :
static { System.loadLibrary(cairo-android); }
drawPNG(bmp);
Regards,
Tarnyko
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