On Mon, 8 Aug 2016 16:36:36 +0100 Emmanuel Gil Peyrot <[email protected]> wrote:
> On Mon, May 23, 2016 at 12:00:13PM +0300, Pekka Paalanen wrote: > > On Sat, 21 May 2016 03:43:04 +0100 > > Emmanuel Gil Peyrot <[email protected]> wrote: > > > > > This client uses libiio to retrieve accelerometer values from the iio > > > subsystem on Linux (and maybe some other kernels), and automatically > > > rotate the output whenever orientation changed. > > > > > > I tested it with a mma8453 accelerometer, but everything needed should > > > be available in the configuration to make it work with any other iio > > > device. > > > > > > Signed-off-by: Emmanuel Gil Peyrot <[email protected]> > > > --- > > > Makefile.am | 24 +++ > > > clients/autorotater.c | 472 > > > ++++++++++++++++++++++++++++++++++++++++++++ > > > configure.ac | 15 ++ > > > desktop-shell/shell.c | 1 + > > > protocol/weston-rotater.xml | 26 +++ > > > src/compositor.h | 3 + > > > src/rotater.c | 150 ++++++++++++++ > > > 7 files changed, 691 insertions(+) > > > create mode 100644 clients/autorotater.c > > > create mode 100644 protocol/weston-rotater.xml > > > create mode 100644 src/rotater.c > > > > Hi Emmanuel, > > Hi Pekka, > > > > > why is there a new client for this? Could it not be a plugin? > > > > Is IIO potentially so slow and blocking we cannot use it in the server > > process? > > > > Why the polling approach, cannot IIO deliver events? > > The actual issue here is driver support for event-based IIO is spotty > at best, as I found out while trying to implement that method. I > haven’t been able to find out programatically whether a driver will > behave as expected in the event-based API (which IIO people call “the > high-speed mode”), and implementing both methods with a blacklist > doesn’t seem sensible. Having a method working with every driver seems > to be the most sensible and generic way. Hi, ok, that's an important design choice worth mentioning. > > > > Should there be a way to set which outputs get rotated by a specific > > IIO device, rather than assuming there is just one device rotating all > > outputs at once? > > This has been added to the v2, an arbitrary number of autorotators can > now be used to drive an arbitrary number of weston_outputs. > > > > > Any reason why this is limited to desktop-shell rather than being a > > shell-agnostic feature? > > In the v2 I made it a Weston module, it now won’t be used without being > listed in the modules option of the [core] section. Sounds good! Thanks, pq
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