Hello all, A while back, in the IVI PR call we had an open discussion about potential improvements and features we could add to the AGL compositor [1] as to make it more appealing to OEMs and other Tier participants in the AGL project. This week, at the AGL F2F Meeting, we've lunched this topic again and we've further decided to extend this request for comments to gather more feedback over the mailing list on the matter. The idea is to figure out what kind of features are useful to have in the AGL compositor, what features you've been using and you believe you'd require to have in the AGL compositor. So with that in mind, feel free to comment, bring in examples, potential use-cases that need to handled in the AGL compositor so we can translate those into actionable development plans. We'd like to use this occasion to try to engage as many people as possible, and keep this discussions always open. For example, some of suggestions we have gathered so far, mostly from Joel Winarske mentioned back then were the following: - support for hybrid cases like CarPlay or Android Auto as well as supporting native IVI. - a rules based engine - arbitrary positioning and z-order of windows/applications - some kind of panel expansion happening automatically if they do not match the entire width - animations for the panels; presumably user-controllable - support multiple-touch gestures for panels (3 finger swipe) Some of these are, in some form, already present in the compositor but their usage is fairly limited, having either literally no users, or being used sporadically. So I suppose here we might actually need demos and some further specific use-cases to exercise those code paths and to verify how much of these are actually useful or need feature improvements. For instance we have support for integrating with a rule based engine in the compositor [2], support for arbitrary positioning and activation using a private extension [3], with a design plan to switch to using another channel of communication (gRPC) for manipulation and management of windows and their properties [4]. ivi-shell [5] and wayland-ivi-extension [6] has been a predominant part of IVI, and some of it is still is, but contributions to maintain it and improving it has been for some years quite low. The most important change upstream has seen in a while is to be able to use xdg-shell clients applications to run on ivi-shell. All toolkits implement the xdg-shell underneath so that's the de facto window management protocol in use. Nevertheless the ability to perform additional management of windows -- the arbitrary positioning and z-order of windows/applications item list, mentioned already above, is exposed in some form when using the AGL compositor, with some plans in-flight to further improve the way this works in terms of client API but also internally, in the compositor. The follow-up from this would be what other features from the ivi-shell/wayland-ivi-extension would be good to have -- or maybe a requirement -- in the AGL compositor? Uses-cases or examples would be a good candidate to try to understand what are the bits missing and are useful for people developing IVI systems. [1] https://docs.automotivelinux.org/en/needlefish/#5_Component_Documentation/1_agl-compositor/ [2] https://docs.automotivelinux.org/en/needlefish/#5_Component_Documentation/3_rba/ [3] https://gerrit.automotivelinux.org/gerrit/gitweb?p=src/agl-compositor.git;a=blob;f=protocol/agl-shell-desktop.xml;h=e4445bd071f242b229789c68dc71d04ea2eed140;hb=refs/heads/master [4] https://jira.automotivelinux.org/browse/SPEC-4503 [5] https://gitlab.freedesktop.org/wayland/weston/-/tree/main/ivi-shell [6] https://github.com/COVESA/wayland-ivi-extension -=-=-=-=-=-=-=-=-=-=-=- Links: You receive all messages sent to this group. View/Reply Online (#10212): https://lists.automotivelinux.org/g/agl-dev-community/message/10212 Mute This Topic: https://lists.automotivelinux.org/mt/94404982/2167316 Group Owner: agl-dev-community+owner@xxxxxxxxxxxxxxxxxxxxxxxxx Unsubscribe: https://lists.automotivelinux.org/g/agl-dev-community/leave/4543822/2167316/883735764/xyzzy [list-automotive-discussions82@xxxxxxxxxxx] -=-=-=-=-=-=-=-=-=-=-=-
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