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2023-08-19til_stream: the first tap per-frame should drive the pipeVito Caputo
In the case of clones there's multiple identical contexts at the same path, putting their taps on the same pipe. Since these clones likely exist for the purpose of parallel rendering, chaotically scheduled, it's arbitrary which of the clones will render first in a given frame. So it would just be a matter of luck if the first to render was also the driving tap established at context create time. Until the driving context rendered, the non-driving contexts would render potentially stale values from their taps, carried from the last frame. Then the driving tap's context would render, advancing all taps it drove, and it plus any subsequent renders sharing the pipe in the frame would have the new tapped values, producing randomly inconsistent results. You can easily cause this today with checkers::fill_module=plato, since plato has some taps for the orbit/spin rates, and checkers uses context clones for parallel fill_module= rendering. Note this is orthogonal to cases like modules/rkt, where hooks are used to steal ownership of the pipes when they're created. rkt also becomes the driver of the taps from its ctor hook, since it bridges Rocket data to the taps, and this commit does potentially interfere with that by introducing a per-frame competition to determine driver. But since rkt is the top-level rendering module when its in use, calling into the per-scene module contexts when appropriate, it's guaranteed to always win the race as long as it maintains its taps using Rocket-provided values before rendering the scene - which is the way it works today.
2023-08-19til_stream: set frame in til_stream_pipe_set_driving_tap()Vito Caputo
This needs the stream pulled in so the signature changed to accomodate that. Also modules/rkt was calling this conditionally which won't be compatible with the per-frame driver race model, so always call it to maintain the driving position every frame.
2023-08-19til_stream: track frame in til_stream_pipe_tVito Caputo
This is needed for determining which tap's first on a given pipe per-frame.
2023-08-18main: call til_stream_start_frame()Vito Caputo
Tell the stream when starting a new frame...
2023-08-18til_stream: introduce a per-stream frame counterVito Caputo
This adds til_stream_start_frame() which advances a per-stream counter. Subsequent commits will make use of this for implementing a pre-frame competition for pipe ownership.
2023-08-16modules/*: update all taps in context_create()Vito Caputo
Mechanical change of ensuring what little taps are implemented always get updated @ til_module_t.context_create() time as well as on every frame. This ensures the pipes are registered on stream immediately upon context creation, rather than appearing only once the context gets rendered the first time.
2023-08-14modules/rkt: stop leaking rkt_setup_t.scener_addressVito Caputo
Another trivial leak fixup.
2023-08-14modules/rkt: gc module contexts after scener editsVito Caputo
This triggers immediate cleanup of the replaced context. It's being done after the new context is fully installed as the replacement, with an eye towards enabling a baton style handoff of the existing context's owned pipes to the replacement, for taps they have in common. That's not being done yet, but it'd be impossible if the gc occurred before creating the replacement, since the existing context's pipes would already be untapped (and removed).
2023-08-14modules/rkt: free rkt_context_t.scenes in rkt_destroy_context()Vito Caputo
Another trivial leak fixup
2023-08-14modules/rkt: wire up pipe_dtor to stop leaking rkt_pipe_tVito Caputo
On shutdown til_stream_untap_owner() will call into the pipe_dtor hook if set. So until now this was just (harmlessly) leaking the rkt_pipe_t allocated by the pipe_ctor hook on the road to process exit. But in the interests of silencing ASAN about leaks on graceful exit, I'm tying up these loose ends. This dtor will also be utilized for performing a FORGET_TRACK via Rocket once that's a thing. While here I also got rid of the pipe_dtor return value, as it's unused with no clear potential purpose (for now).
2023-08-14modules/mixer: restrict randomized module settingsVito Caputo
This is mainly to prevent the mixer's b_module=compose default from always sending the randomizer down a deep nested compose scenario. But it's also just giving the mixer random variety in both a/b modules, while keeping compose out. This alone seems to go a long way towards preventing problematically deep randomized setups under rtv.
2023-08-14modules/rtv: add blurb about tokchannels leakVito Caputo
Not bothering with fixing this because rtv needs its channels setup redone altogether to better resemble something like rkt::scenes, but allowing partial specification of the settings as a means of controlling specific settings while randomizing the rest.
2023-08-14til_settings: handle errors in til_settings_as_arg()Vito Caputo
til_str_appendf() preventing overflows doesn't do much good if we don't notice the errors and behave appropriately...
2023-08-14til_str: handle overflows in til_str_appendf()Vito Caputo
In the wholesale transition to til_module_setup_full() there's been a lot more problematic randomized setups either extremely deep or plain infinite. Due to the primitive escaping mechanism performed by til_settings_as_arg(), where escape patterns grow exponentially with depth, it's quite realistic (and observed) for these problematic setups to exceed SIZE_MAX. So I'm putting some guard rails in to cap a given til_str_t to SIZE_MAX. It might make more sense to move the limit well below SIZE_MAX, but this should at least prevent overflows.
2023-08-14til_str: realloc in increasingly larger incrementsVito Caputo
Typically people do a exponential style growth in such circumstances, but in my experience that tends to allocate nearly double what's needed quite often. Trying just a linearly increasing allocation size that bumps up the minimum amount every time a resize is triggered. If the needed amount exceeds the new growth increment, the larger value is used, but the growth rate still follows the minimum bump. I expect this to evolve more, just wanted to do something to speed up til_str a bit from it's naive approach.
2023-08-14modules/compose: exclude compose from layersVito Caputo
This was prevented before but lost in the shift to til_module_setup_full() wrappers...
2023-08-13main: free setups and settings in shutdownVito Caputo
more cleaning up stuff on exit
2023-08-13modules/rtv: don't gc from cleanup_channel()Vito Caputo
cleanup_channel() is called from rtv_destroy_context(), which can be called by a gc. The gc isn't reentrant and generally isn't expecting this, so it breaks in hilarious ways when this happens, usually ending in a segfault. gc should probably get some defenses for asserting on reentry... for now let's just prevent crashing by removing the gc call from the destroy path.
2023-08-13modules/shapes: plug context leakVito Caputo
b6362c54 introduced shapes_destroy_context() for the radcache, but didn't actually cleanup the context, oops. trivial fix
2023-08-13sdl_fb: plug title leakVito Caputo
trivial fix of a trivial leak on teardown
2023-08-13main: switch to til_fb_halt()Vito Caputo
This gets rid of the rototiller_thread() pthread_cancel() based exit which seemed to rarely make clang's ASAN (-fsanitize=address) very angry with a segfault in libc somewhere Instead of trying to chase that down I'm just getting rid of it, it's unnecessary.
2023-08-13til_fb: introduce til_fb_halt()Vito Caputo
This makes it so til_fb_page_get() will return NULL when the fb has been "halted". If til_fb_page_get() is already waiting for a page to become available, it will be woken up by til_fb_halt(). Preparatory commit for eliminating the reliance on pthread_cancel() to terminate rototiller_thread() on shutdown. Cancellation is always a PITA, especially cross-platform, but in general it's so easy to have subtle bugs when using it.
2023-08-13til_fb: track all pages and free them in til_fb_free()Vito Caputo
Pages that have been handed out from the inactive list didn't live on any lists, not until they were submitted. This commit keeps all pages on a separate list to make cleanup of outstanding pages in til_fb_free() trivial, which has also been introduced here. Just tidying up the shutdown to get rid of a bunch of harmless leaks, in an effort to make ASAN more useful in detecting real leaks on graceful exits.
2023-08-13til_stream: assert when gc leaks in til_stream_free()Vito Caputo
It's expected that all mondule contexts will have been cleaned up by the final gc in til_stream_free(). If the gc returns a non-zero skipped count, it suggests there's a program bug leaking registered contexts.
2023-08-13til_stream: return skipped count from til_stream_gc_module_contexts()Vito Caputo
Preparatory commit for making til_stream_free() assert on leaked module contexts.
2023-08-13til_stream: always assign n_module_contexts in registerVito Caputo
Leaving the larger n_module_contexts on reuse creates the potential for a NULL ptr dereference in places like gc which check the refcount of each countext in the set, without testing for NULL. Rather than making everything check for NULL, just shrink the count when it gets reused in a smaller case. This whole reuse thing is kind of a silly little optimization anyways, and will be revisited when cloning either happens or the sets become deprecated. For now just prevent creating situations that can crash.
2023-08-13til_stream: fix parent_path leak in til_stream_untap_owner()Vito Caputo
Plug a small leak
2023-08-13til_stream: gc module contexts on til_stream_free()Vito Caputo
Technically this was leaking contexts but it's only done on the road to process exit currently anyways.
2023-08-12til_fb: fix bug in til_fb_fragment_slice_single()Vito Caputo
Silly bug, these fragmenters need to be revisited in general to have less copy pasta across the texture fragment and main fragment. Easily triggered with: --seed=0x64daba35 '--module=compose,layers=julia\,checkers\\\,size\\\=:96\\\,pattern\\\=checkered\\\,fill_module\\\=:checkers\\\\\\\,size\\\\\\\=128\\\\\\\,pattern\\\\\\\=checkered\\\\\\\,fill_module\\\\\\\=moire\\\\\\\\\\\\\\\,type\\\\\\\\\\\\\\\=pinwheel\\\\\\\\\\\\\\\,scale\\\\\\\\\\\\\\\=1\\\\\\\\\\\\\\\,pinch\\\\\\\\\\\\\\\=0\\\\\\\\\\\\\\\,points\\\\\\\\\\\\\\\=5\\\\\\\\\\\\\\\,spin\\\\\\\\\\\\\\\=.1\\\\\\\,dynamics\\\\\\\=alternating\\\\\\\,dynamics_rate\\\\\\\=1.0\\\\\\\,fill\\\\\\\=textured\\\\\\\,fill_color\\\\\\\=0xffffff\\\\\\\,clear\\\\\\\=textured\\\\\\\,clear_color\\\\\\\=0x000000\\\,dynamics\\\=alternating\\\,dynamics_rate\\\=1.0\\\,fill\\\=textured\\\,fill_color\\\=0xffffff\\\,clear\\\=textured\\\,clear_color\\\=0x000000,texture=plasma' '--video=sdl,fullscreen=off,size=640x480'
2023-08-12modules/checkers: fix clipping bug in fragmenterVito Caputo
The existing code wasn't clipping correctly to the right/bottom edges of the incoming fragment when the xoff/yoff was 0 but xshift/yshift non-zero. In that case the incoming fragment bound was unintentionally being enlarged, resulting in an overrun when the such a cell was filled/cleared. It was discovered watching montage under rtv, which stumbled across running checkers w/size=128 on a montage tile of 128x96. The height/y coords of the single checker cell filling the whole montage tile weren't getting clamped properly down to the 96-tall tile. The shifting for centering checkers introduced some really annoying arithmetic in this fragmenter.
2023-08-12modules/checkers: minor cosmetic changes to fragmenterVito Caputo
Trivial changes to improve some naming / scoping, done while investigating a bug. Nothing functionally changed
2023-08-09modules/mixer: remove TIL_MODULE_EXPERIMENTAL flagVito Caputo
This module is here to stay
2023-08-09modules/mixer: %S/fade/blend/gVito Caputo
Blend is a more accurate word for what's being done. Fading is something you can achieve with the blend mode, if you use something like "blank" as one of the modules. But when you have two modules generating content, it's not a fade, it's just a blend. It might make sense in the future to support a "fade" which assumes a solid color for one module rather than having to use the "blank" builtin which burns memory bandwidth on a blank frame.
2023-08-08modules/rtv: til_module_setup_full()-ize snow_module=Vito Caputo
Just more largely mechanical changes transitioning ad-hoc nested module handling over to til_module_setup_full().
2023-08-08modules/roto: trivial indentation fixupVito Caputo
2023-08-07modules/rkt: add EDITSCENE state akin to NEWSCENEVito Caputo
Now you can seed the scene editing with a top-level serialized scene in "as_arg" form, just like NEWSCENE. The current scene being edited is shown in serialized form for convenient copy & paste into an editor for manipulation, between the []s both to also show what the default seed will be if you just press enter. When using the copy & paste w/editor approach, you'd just paste the tweaked form directly into the waiting prompt before hitting <enter>. Regardless of what happens at the initial EDITSCENE prompt, the current implementation always goes through an interactive visiting of all the settings. Simply pressing enter at those individual settings will accept their current value from the serialized seed, or a default if not present in the settings.
2023-08-07modules/rkt: make NEWSCENE state a simple functionVito Caputo
This doesn't need to be a distinct state since it's basically just a banner for the start of the newscene process which never recurs, it's not an interactive prompt or dialog of any kind...
2023-08-07modules/checkers: fix radcache partial initialization bugVito Caputo
Running something like: '--module=checkers,size=64,fill_module=shapes,style=circle --defaults --go' Would show some artifacts in the top portion of the filled cells at certain phases of the spining shape. This was introduce by the radcache, and it's caused by the overhanging tiles on the perimeter and how their being clipped was carrying into the radcache contents then used for all subsequent renders. This commit just makes setting radcache.initialized conditional on the incoming fragment being a full-frame fragment as a quick fix. See comment for more info on what to do long-term.
2023-08-07modules/checkers: ensure all fill_module_contexts renderVito Caputo
There's potential for some of the per-cpu fill_module_contexts to go unused for an entire frame. When this occurs, depending on the fill_module in use, it can lead to their context's state diverging. To mitigate this possibility, add a tidying up pass in checkers_finish_frame() where such straggler contexts are identified and forced to render once into a cell-sized waste_fb of off-screen memory. This ensures all contexts see all frames/ticks that any participated in, preserving their clone status across the board. Prior to this you could see jittering in something like '--module=checkers,fill_module=roto' as the roto contexts diverged on the r/rr variables when some didn't get in on the action of some frames. See large TODO comment for why this approach is used instead of something less wasteful of cpu time. If this approach is kept, it might make sense to do the waste rendering in parallel. Systems with large numbers of cores could end up with many stragglers, depending on how many cells there are vs. cpus. I don't have any such systems so it's difficult to test any efforts in that vein.
2023-08-06modules/roto: only update fill_fb on changed ticksVito Caputo
In compositions where roto recurs in the same frame, it's wasteful to keep rendering the fill_fb contents manifold for the same tick. They shouldn't be varying anyways... It'd be different if the fill_module rendered directly to the output fragment in an overlay manner, but the current roto implementation doesn't do that. It's just sampling fill_fb like a tiled texture sampler would. The performance hit here is easily observed by doing something like: --module='checkers,size=4,fill_module=roto\,fill_module\=moire' --video=mem --defaults --go Before this change, FPS=1 on my i7 X230. After, FPS=~400.
2023-08-05modules/mixer: til_module_setup_full() for inputsVito Caputo
Switch to til_module_setup_full() for handling the module setup of the input {a,b}_module settings
2023-08-05modules/compose: til_module_setup_full() layers=/texture=Vito Caputo
Switch to til_module_setup_full() for handling the module setup of the individual layer module settings as well as the texture. Since compose served as the development mule for adding nested settings, there was a lot of verbose comments that no longer seemed necessary since much of the dust has settled. The separate compose_layer_module_setup() and compose_texture_module_setup() wrappers feel a bit like copy-pasta too. I'm tempted to stop using these and just open code the til_module_setup_full() calls, except they get performed twice due to the split finalize, so it's probably still a net win as-is.
2023-08-05til: fix til_module_setup_full() exclusionsVito Caputo
Stupid bug in untested/unused exclusions handling
2023-08-05modules/montage: til_module_setup_full() for tiles=[...]Vito Caputo
Switch to til_module_setup_full() for handling the module setup of the individual tile module settings.
2023-08-05til_builtins: add flag to "blank" builtinVito Caputo
Missed one!
2023-08-05modules/roto: til_module_setup_full() for fill_module=Vito Caputo
Switch to the generic til_module_setup_full() and rely on the "none" builtin's NULL res_setup on finalize to indicate when no fill_module is desired. This gets rid of the need for a separate til_module_t* handle for the fill_module, since til_setup_t.creator can be used for that, and the NULL til_setup_t* to indicate no fill_module. Basically discards some busy work style code, there's more cleanups needed surrounding this stuff though. More or less identical to the previous change to modules/checkers.
2023-08-05modules/checkers: til_module_setup_full() for fill_module=Vito Caputo
Switch to the generic til_module_setup_full() and rely on the "none" builtin's NULL res_setup on finalize to indicate when no fill_module is desired. This gets rid of the need for a separate til_module_t* handle for the fill_module, since til_setup_t.creator can be used for that, and the NULL til_setup_t* to indicate no fill_module. Basically discards some busy work style code, there's more cleanups needed surrounding this stuff though.
2023-08-05setup: handle ':' prefixes in setup_interactively()Vito Caputo
This was done for rkt_scener already, this commit brings interactive setup inline WRT :raw_value overrides on multiple choice settings.
2023-08-05modules/{compose,montage,rtv}: exclude builtinsVito Caputo
Basically everywhere the TIL_MODULE_HERMETIC|TIL_MODULE_EXPERIMENTAL exclusions were being applied needed TIL_MODULE_BUILTIN added. Mostly this is to prevent randomizers from tripping over builtins in the available modules lists they draw from. Because builtins aren't visually interesting by themselves, and in some cases don't currently even have a means of being randomized properly like ref's path setting. This wasn't needed previously since builtins were kept off the modules list altogether. But since 1a6210be that changed and they must be explicitly filtered by flag instead. Note I deliberately left the rkt case with just a TODO comment. It's not a randomizer situation, and it might be acceptable to let rkt just show everything all the time in the module lists. That whole situation there is for advanced users. Also note that without this, rtv et al would easily trigger an assert on NULL setup due to the "none" builtin. Since there's still work to be done there in callers properly handling NULL @res_setup on a successful finalize. But this commit mitigates that by avoiding the builtins in the randomizers.
2023-08-05til: use set_raw_value() in randomize_setup() overridesVito Caputo
Missed this in the last round of moving things to the new raw_value() setter/getter api This snippet of copy-n-pasta the few setup front-ends continue to have should really be factored out into a libtil helper
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