Hi John,
Does the redesign of the display system make it easier to add support
for screen rotation? And what (if any) is the level of interest within
Genode Labs for this feature?
It would be a very nice feature for phones and tablets, but it would
also be useful in a multi-monitor situation for the desktop. From the
outside perspective, it looks like it would fit seamlessly into the
overall design, but that is without any insight into the low-level details.
the most straight-forward idea to support screen rotation would be
adding this as a configurable driver feature. We have actually briefly
explored this topic in the context of the intel-fb driver and the
display driver for the MNT Pocket Reform (which strictly requires screen
rotation). For the former, we found that rotation does not seem to be
offered as a hardware feature. For the latter, we went for a simple
software-based rotation function as an intermediate solution. For both
cases, I'm planning to investigate the use of SIMD (AVX and Neon) to
make this technically possible and reasonably fast. But no promise. :)
Cheers
Norman
--
Dr.-Ing. Norman Feske
Genode Labs
https://www.genode-labs.com · https://genode.org
Genode Labs GmbH · Amtsgericht Dresden · HRB 28424 · Sitz Dresden
Geschäftsführer: Dr.-Ing. Norman Feske, Christian Helmuth
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