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2022-05-21til: supply a seed to til_module_t.create_context()Vito Caputo
In the recent surge of ADD-style rtv+compose focused development, a bunch of modules were changed to randomize initial states at context_create() so they wouldn't be so repetitive. But the way this was done in a way that made it impossible to suppress the randomized initial state, which sometimes may be desirable in compositions. Imagine for instance something like the checkers module, rendering one module in the odd cells, and another module into the even cells. Imagine if these modules are actually the same, but if checkers used one seed for all the odd cells and another seed for all the even cells. If the modules used actually utilized the seed provided, checkers would be able to differentiate the odd from even by seeding them differently even when the modules are the same. This commit is a step in that direction, but rototiller and all the composite modules (rtv,compose,montage) are simply passing rand() as the seeds. Also none of the modules have yet been modified to actually make use of these seeds. Subsequent commits will update modules to seed their pseudo-randomized initial state from the seed value rather than always calling things like rand() themselves.
2022-05-01til_fb: add draw flags for controlling texturabilityVito Caputo
Just adds TIL_FB_DRAW_FLAG_TEXTURABLE so callers can granularly inhibit texturing if desired.
2022-05-01modules/*: make use of generic fragmentersVito Caputo
Just one case, modules/submit, was using 32x32 tiles and is now using 64x64. I don't expect it to make any difference. While here I fixed up the num_cpus/n_cpus naming inconsistencies, normalizing on n_cpus.
2022-05-01til: wire n_cpus up to the fragmenter functionVito Caputo
Fragmenting is often dimensioned according to the number of cpus, and by not supplying this to the fragmenter it was made rather common for module contexts to plumb this themselves - in some cases incorporating a context type/create/destroy rigamarole for the n_cpus circuit alone. So just plumb it in libtil, and the prepare_frame functions can choose to ignore it if they have something more desirable onhand. Future commits will remove a bunch of n_cpus from module contexts in favor of this.
2022-04-25modules/*: set TIL_MODULE_OVERLAYABLE where appropriateVito Caputo
In the interests of facilitating randomized automagic layered compositing, tell the world when you're overlay-appropriate.
2022-04-24*: s/void */til_setup_t */Vito Caputo
This brings something resembling an actual type to the private objects returrned in *res_setup. Internally libtil/rototiller wants this to be a til_setup_t, and it's up to the private users of what's returned in *res_setup to embed this appropriately and either use container_of() or casting when simply embedded at the start to go between til_setup_t and their private containing struct. Everywhere *res_setup was previously allocated using calloc() is now using til_setup_new() with a free_func, which til_setup_new() will initialize appropriately. There's still some remaining work to do with the supplied free_func in some modules, where free() isn't quite appropriate. Setup freeing isn't actually being performed yet, but this sets the foundation for that to happen in a subsequent commit that cleans up the setup leaks. Many modules use a static default setup for when no setup has been provided. In those cases, the free_func would be NULL, which til_setup_new() refuses to do. When setup freeing actually starts happening, it'll simply skip freeing when til_setup_t.free_func is NULL.
2022-04-22modules/checkers: experimenting with a checkers overlayVito Caputo
This adds a checkers style overlay module, it's not terribly interesting but may be made more useful if modules start differentiating themselves as substantial vs. overlay effects. It'd be nice if rtv/compose could automagically apply and randomize overlay modules atop others, which would make use of this type of thing as well as encourage more small modules like these be written.
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