SK-AM62: building application for directfb output

Emanuele Peruzzi

Part Number: SK-AM62

Hello,

i am using Processor sdk 8.03.00.19 and i am trying to build an application that prints directly onto linux framebuffer bypassing Wayland. Since i am still unfamiliar with linux development, i need some hints for doing this.

I do not need any desktop manager, like wayland, at all, and would like to disable it. I need my application to directly write onto framebuffer. My questions are:

1. Have i to rebuild the entire sdk through bitbake?

2. According to this documentation, adding DISTRO_FEATURES_remove = "wayland" to .conf file is enought to have a qt app that prints directly onto fb.

3. an example would be very appreciated.

Kind Regards

Emanuele Peruzzi

over 2 years ago

+1 Krunal Bhargav34 over 2 years ago

TI__Mastermind 44585 points

Hello Emanuele,

For development purposes, I do not think you need to rebuild the entire SDK. My recommendation would be to run the commands:

# /etc/init.d/weston stop
# kmscube --device=/dev/dri/card0

or 

# kmstest

The above examples will write to your FB to DSS without having a need for a windowing manager. The source code for above examples are public and you can find then on the following links:
1. https://github.com/tomba/kmsxx/tree/master/kms%2B%2B/src
2. https://gitlab.freedesktop.org/mesa/kmscube 

Regards,
Krunal

0 Emanuele Peruzzi over 2 years ago in reply to Krunal Bhargav34

Intellectual 645 points

ty, krunal,

i noticed that stopping weston and launching the qt app with qt variable as documented here did the trick. Thank you

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SK-AM62: building application for directfb output