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2021-10-01*: librototiller->libtilVito Caputo
Largely mechanical rename of librototiller -> libtil, but introducing a til_ prefix to all librototiller (now libtil) functions and types where a rototiller prefix was absent. This is just a step towards a more libized librototiller, and til is just a nicer to type/read prefix than rototiller_.
2021-02-14*: split rototiller.[ch] into lib and mainVito Caputo
This is a first approximation of separating the core modules and threaded rendering from the cli-centric rototiller program and its sdl+drm video backends. Unfortunately this seemed to require switching over to libtool archives (.la) to permit consolidating the per-lib and per-module .a files into the librototiller.a and linking just with librototiller.a to depend on the aggregate of libs+modules+librototiller-glue in a simple fashion. If an alternative to .la comes up I will switch over to it, using libtool really slows down the build process. Those are implementation/build system details though. What's important in these changes is establishing something resembling a librototiller API boundary, enabling creating alternative frontends which vendor this tree as a submodule and link just to librototiller.{la,a} for all the modules+threaded rendering of them, while providing their own fb_ops_t for outputting into, and their own settings applicators for driving the modules setup.
2021-02-14compose,montage,rtv: drop author and license fieldsVito Caputo
These modules are meta modules, and the only place this information is presented currently is in the rtv module captions overlaying the visual output of unrelated modules. So it's rather misleading to put the meta module's author and license on-screen when what's being shown is arguably just a tiny fraction of the meta module's contribution. Rather than bother with constructing license and author lists at runtime from the modules incorporated by these meta modules, let's instead adopt a policy of meta modules omit any declaration of license or authorship outside of the source. This is a simple solution for now, it can be revisited later if necessary. Changing the .author member of rototiller_module_t to an .authors() function pointer wouldn't be difficult. But it does open up something of a can of worms when considering recursive dependencies and needing to construct unique authors and licenses lists from things like nested meta modules. Obviously there can't be infinite recursion as that would manifest in the rendering path as well, but what I'm more concerned about is properly handling potentialy quite long lists. It's already annoying when rtv has to deal with a long settings string, which I believe currently is just truncated. The same would have to be done with long authors/licenses I guess. In any case, I think it's probably fine to just leave authorship and license ambiguous when a meta module is shown in rtv. It's certainly preferable to vcaputo@pengaru.com getting credit for everything shown in the three meta modules currently implemented, or more specifically, the two shown in rtv; compose and montage. Note this required making rtv tolerante of NULL .license and .author rototiller_module_t members.
2021-02-08modules/*: normalize description capitalizationVito Caputo
Minor cosmetic consistency fixup
2021-01-17compose: add plato to default layersVito Caputo
now: "drizzle:stars:spiro:plato"
2020-09-26modules/compose: set default layersVito Caputo
In case some code path creates module contexts and renders without applying settings, it's important to ensure there are defaults. As-is this would have crashed compose because compose_layers would have been NULL, and compose_create_context() assumed compose_layers always contained something useful. Montage would have been an example of this, though for other reasons montage has had compose disabled so I don't think anything currently would have triggered this.
2020-09-25modules/compose: add a rudimentary compositing moduleVito Caputo
--module=compose,layers=first:second:third:... this draws the named modules in the order listed, overdrawing the output of the previous layers in a cumulative fashion.
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