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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.
2021-02-08modules/*: normalize description capitalizationVito Caputo
Minor cosmetic consistency fixup
2020-01-25rototiller: introduce ticks and wire up to modulesVito Caputo
Most modules find themselves wanting some kind of "t" value increasing with time or frames rendered. It's common for them to create and maintain this variable locally, incrementing it with every frame rendered. It may be interesting to introduce a global notion of ticks since rototiller started, and have all modules derive their "t" value from this instead of having their own private versions of it. In future modules and general innovations it seems likely that playing with time, like jumping it forwards and backwards to achieve some visual effects, will be desirable. This isn't applicable to all modules, but for many their entire visible state is derived from their "t" value, making them entirely reversible. This commit doesn't change any modules functionally, it only adds the plumbing to pull a ticks value down to the modules from the core. A ticks offset has also been introduced in preparation for supporting dynamic shifting of the ticks value, though no API is added for doing so yet. It also seems likely an API will be needed for disabling the time-based ticks advancement, with functions for explicitly setting its value. If modules are created for incorporating external sequencers and music coordination, they will almost certainly need to manage the ticks value explicitly. When a sequencer jumps forwards/backwards in the creative process, the module glue responsible will need to keep ticks synchronized with the sequencer/editor tool. Before any of this can happen, we need ticks as a first-class core thing shared by all modules. Future commits will have to modify existing modules to use the ticks appropriately, replacing their bespoke variants.
2019-12-30pixbounce: fix bugs, refactor for resizingPhilip J Freeman
- fix bug for square fragments - use create and destroy context hooks instead of globals - refactor to allow fragment resizing - handle extremely small fragments gracefully
2019-11-23rototiller: pass cpu to .render_fragment()Vito Caputo
Mostly mechanical change, though threads.c needed some jiggering to make the logical cpu id available to the worker threads. Now render_fragment() can easily addresss per-cpu data created by create_context().
2019-11-10pixbounce: add pixbounce modulePhilip J Freeman
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