| Age | Commit message (Collapse) | Author |
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checkers::fill_module is presently implemented via creating
n_cpus identical module contexts, each having n_cpus=1.
Establishing a set of cloned per-cpu contexts, allowing threaded
rendering using any fill_module, regardless of if that module
internally implements threaded rendering.
This works fine, but creates some awkwardness for a future where
contexts are registered and discoverable within the stream at
their respective setup's path. In the checkers::fill_module
case, there would be n_cpus contexts at the same path since they
share the same til_setup_t. Those need to be dealt with
gracefully, ideally making the clones available to another
potentially clone-needing module (imagine a checkers::fill_module
transitionining to another checkers::fill_module situation, where
the transitioned-to fill_module refers to the context by path, it
should get all the contexts out of the stream as-is)
In this commit I'm adding a more formalized method of creating
multiple contexts from the same set of parameters, in preparation
for a future where module contexts get registered on the stream
at their til_setup_t.path. By putting the cloned creates behind
the til API it should at least be relatively trivial to get the
on-stream context registration to capture the multiple contexts.
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This makes TIL_MAXCPUS a proper thing
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The win32 and mach builds were free to violate this, as it's
always just been a local define for putting some kind of bound on
the linux "/sys/devices/system/cpu/cpuN" probing loop.
But in preparation for moving TIL_MAXCPUS out to til_util.h for
public consumption in sizing per-cpu arrays, it needs to actually
be enforced consistently as an upper bound cap. That way
everything can safely assume n_cpus won't ever exceed
TIL_MAXCPUS.
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Mechanical rename in preparation for context buckets for hashing
all contexts existing on a stream.
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Somewhere along the line this leak was created, there's been a
lot of activity surrounding this stuff so it's unsurprising.
A little janky surrounding the conditional on snow module, but
that's just how snow is handled today - it doesn't get randomized
like the other channels do.
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Rather than creating an orphaned settings instance private to
til_module_setup_randomize(), the function now requires the
settings instance be provided.
The one remaining caller of this function is modules::rtv. Now
that rtv is responsible for creating the settings beforehand, and
the settings may be created with a path prefix, rtv gets its
til_module_context_t->setup.path prefixed for all the channel
settings.
Another improvement is now the channel settings instance gets
created from the module name as the settings string. So while
it's not yet possible to sparsely specify settings with others
being randomized, at least now when log_channels=on is in effect,
the printed args include the top-level channel module.
Having proper complete paths for the rtv channel modules is
especially visible in --print-paths output FYI.
An interesting test for exercising all this is:
```
$ src/rototiller --module=rtv,duration=0,context_duration=0,snow_module=none,channels=all,log_channels=on --print-pipes --defaults --go 2>/tmp/channels
in another terminal:
$ tail -F /tmp/channels
```
watch the chaos unfold
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r variable is checked for zero(success) before writing to *res_arg,
but could be left uninitialized (especially in a future scenario where
an incoming til_settings_t is fully populated and described).
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Preparatory commit for bridging the gap separating a baked
til_setup_t from a runtime-populated descendant til_settings_t
like modules::rtv produces for its channels via
til_module_setup_randomize().
For these currently orphaned til_settings_t instances we don't
readily have access to the logical ancestor til_settings_t that
was used to produce the module_context's bound til_setup_t. But
we don't really need the ancestor til_settings_t, all we _really_
want is the ancestral path to prefix the orphan til_settings_t
instances.
So this commit introduces supplying a prefix which gets prepended
to paths printed via the settings instance. A later commit will
make use of this in modules::rtv when producing the settings
instance passed to til_module_setup_randomize()
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These were being leaked by til_esttings_free()
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Preparatory commit for when settings are supplied by caller,
potentially populated and described.
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In a world where "describing" settings is an iterative process,
especially post-nested-settings which are realized via the
desc-applying process, it's better to not even offer desc-setting
while adding a new setting.
This commit just gets rid of that.
The one caller that was passing a non-NULL desc to
til_settings_add_value(), til_module_setup_randomize(), was
redundantly doing so since the subsequent desc-processing was
assigning it again anyways. Future commits will likely change
til_module_setup_randomize() use a non-NULL desc for skipping
desc-applying, which wouldn't even work if it was always setting
the desc @ add time. That becomes necessary for partially
randomizing sparsely-populated settings.
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Montage would randomize orphaned setting instances for the
participating modules @ context create time.
This not only produced montage tiles one couldn't configure via
settings even if they wanted to, but it also produced partial
paths due to the orphaned settings instances.
With this commit montage tiles are configurable in the same way
compose::layers are; a comma-separated list of modules with
settings accompanying them.
Randomizing is no longer performed, but if seen via something
like rtv, that randomizer will operate on the regular setup
machinery to produce randomized montages.
One new ability delivered with tiles= is you can specify the same
module repeatedly to produce a tiled display of the same thing.
Those instances may have the same or different settings, it's
totally controllable.
This also opens up the future for more interesting things like
shiftng ticks in the montage tiles... imagine showing the same
module a few times in each row, but offsetting ticks into the
future/past in the columns. For ticks-driven modules, you'd see
the future/past frames side by side, like a flipbook effect.
This leaves rtv as the only til_module_setup_randomize() caller
remaining...
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There's often a need to exclude specific modules, though it's
often a hacky kludge. It's something relied upon currently for
preventing dangerous recursion scenarios, which will likely get
fixed up more robustly in the future.
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In situations where modules wish to alias setting values like
expanding "all" -> "mod0,mod1,mod2,mod3" they need a way to
intercept the value-acceptance @ desc-assignment time in the
front-end. This optional override() function does just that when
present in the spec.
The current setting's value is passed to the override, and
if what's returned differs from what was passed (by pointer
value), then the current value is freed and the override takes
its place. The override function is expected to _always_ return
non-NULL; either the value provided, or a newly allocated value
override. The override function must never free the supplied
value, that's the front-end's job in applying the override.
The override() must return NULL on errors, which are assumed to
be limited to ENOMEM failures.
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Composite modules that want to provide "all" aliases for modules
like rtv have to construct a comma-separated string of all module
names, usually filtered by some flags.
This helper does just that, but it does add yet another
open_memstream() user to revisit when those all get fixed up.
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Once til_module_context_t.module was introduced, this vestigial
module member @ compose_layer_t.module became redundant.
So here it's dropped in the obvious manner, but the
compose_layer_t struct is retained despite only having
til_module_context_t* now. This is in anticipation of future
additions where compose settings may set per-layer/texture
rendering behaviors (think alpha, colors, texturing toggles, etc)
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There doesn't seem to be a use case for inserting NULL-value
settings, and it's ergonomic to assume a til_setting_t.value is
always a non-NULL heap-allocated string.
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This drops the seq_module= setting in favor of a scenes= setting
in the same style of compose::layers; a nested settings instance
composed of more nested settings instances, one per scene.
A nice side-effect of this change is it no longer uses
til_module_setup_randomize() at all, which was being used to mix
up the seq_module's settings in a pre-nested-settings world.
A new Rocket sync track is introduced named "$context_path:scene"
for selecting which scene to render.
For now all scenes get created @ context create time, and persist
for the entire rkt context lifetime. In the future the context
lifetimes might become explicitly controllable with separate
Rocket tracks used as booleans. This becomes relevant once
modules can make use of existing contexts located within the
stream at their respective context paths. Something necessary
for integrated transitions between scenes using stuff like
fade modules which haven't been added yet.
With this change you can already enumerate a set of scenes in the
rkt settings string, each 100% explicitly configured, and have
Rocket track data select which scene to render on the timeline,
and manipulate the taps at their scene-specific
context-path-derived track names.
In addition to the need for modules picking up existing contexts
on the stream, rkt probably needs a way to interactively
add/remove/modify scenes then spit out the serialized settings
string for the current state of the world.
As these aren't functionalities provided by GNU Rocket, and it's
unclear how receptive upstream GNU Rocket/glrocket maintainers
would be to such additions, rkt will likely first add another
listener for a strictly scenes-editing client to connect
alongside the GNU Rocket stuff. Just something that shows the
current scenes table, and provides a way to edit/add/remove rows
there, with the changes realized in rkt real-time. Then the
Rocket Editor will just continue using the rkt:scene track to
numerically index into this scenes table, without the Rocket
Editor having any visibility or awareness of what's going on in
that table. Probably ok as an initial stab at making demos with
this stack.
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Mechanical change removing some rkt_setup_t* casting verbosity in
rkt_create_context()
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This eliminates the ad-hoc track_name[] allocation and
construction, since the track_name wasn't being used after
getting the track anyways. No point wasting the memory on it,
and the little helper constructing the name on-stack exists now
for another future use @ rkt_create_context().
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Preparatory commit for adding scenes and a $rkt_setup_path:scene
track for selecting them. This will also likely replace the
whole track_name allocation/construction in rkt_pipe_t since we
don't actually make use of that name after getting the track
(except maybe for debugging purposes)
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Mechanical rename just to make this consistent with
til_module_setup()/til_module_setup_finalize()
I should probably do a cleanup pass throughout the til APIs to
standardize on a subject-verb-object or subject-object-verb
order... Things have become a little inconsistent organically
over time
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This changes til_setup_t* from optional to required for
til_module_context_t creation, while dropping the separate path
parameter construction and passing throughout.
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Preparatory for required til_setup_t @ til_module_create_context()
This basically brings til_module_randomize_setup() inline with
til_module_setup_finalize() in that it will still produce a
minimal til_setup_t even if there is no til_module_t.setup()
method.
A future commit will do something about the orphaned
til_settings_t within til_module_randomize_setup() to get a full
path on the produced setup - which will likely simultaneously
bring us into a world where one can influence the randomized
settings externally as well. Influenced in the sense of
potentialy making some of those settings statically configured
while leaving others to be (re)randomized at the time of
til_module_randomize_setup() executing.
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This replaces the few ad-hoc til_module_t.setup() setup-baking
callers with the new til_module_setup_finalize() which always
produces a til_setup_t having an appropriate path, even when
there is no til_module_t.setup() method.
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Preparatory commit for til_module_create_context() requiring
setups even when there's no til_module_t.setup() method.
This helper will produce the minimal til_setup_t in such cases,
or hand off the task to til_module_t.setup() when present.
Note the need for passing res_setting and res_desc to
til_module_t.setup() despite not being a settings-construction
scenario. This is because of how modules using nested settings
tend to use res_setting for storing the current setting in
accessing the nested instance, which must still occur even when
just baking the complete setup.
It's expected that any composite/meta modules utilizing other
modules will use this helper to produce the baked setups, instead
of the ad-hoc direct calling of til_module_t.setup() they do
presently.
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Preparatory commit for deprecating til_module_context_t.path in
favor of mandatory til_module_context_t.setup providing the
settings-derived context path.
Future commit will drop til_module_context_t.{path,path_hash}
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b9123bbb added describing incoming preexisting settings, but the
spec's returned values omitted experimental modules. This
resulted in breaking the ability to say things like --module=rkt
to access the experimental rkt module despite it not showing in
the interactive setup list of values.
This commit includes experimental modules in the spec's values
when being produced for a preexisting, undescribed setting.
Restoring one's ability to access experimental modules via the
CLI.
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This commit adds passing the settings instance to til_setup_new()
which is used for deriving a path for the setup via
til_settings_print_path() on the supplied settings.
That path gets an allocated copy left in the returned
til_setup_t at til_setup_t.path
This path will exist for the lifetime of the til_setup_t, to be
freed along with the rest of the baked setup instance when the
refcount reaches 0.
The incoming til_settings_t is only read @ til_setup_new() in
constructing the path, no reference is kept. Basically the
til_settings_t* is just passed in for convenience reasons, since
constructing the path needs memory and may fail, this approach
lets the existing til_setup_new() call error handling also
capture the path allocation failures as-is turning
til_setup_new() into a bit more of a convenience helper.
Note that now all code may assume a til_setup_t has a set and
valid til_setup_t.path, which should be useful for context
creates when a setup is available.
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Commit 7c8086020 switched the til_setup_new() api to support NULL
free_func for free().
This mechanical change pivots to that instead of the awkwardly
cast free() parameters.
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When voronoi is overlayed the colors get sampled, so randomizing
them is pointless work every frame.
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This seems to work on my 2c/4t laptop and is certainly faster.
But I'm not being careful about using atomics loading/storing the
d->cell pointer, which seems problematic. Surprisingly things
aren't crashing here despite that, maybe on a non-x86 smp box
it'd be a different story.
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Preparatory commit for doing the voronoi distance calculations in
parallel when possible, as part of render_fragment() instead of
all in prepare_frame().
Not all of the distance calculation work can easily be threaded,
but it should be possible to compute the post-seed distances
concurrently within the spatial bounds of the tiled fragment.
This commit doesn't actually change anything functionally, as
it's just splitting the old voronoi_calculate_distances() into
two and calling them both in succession still from
voronoi_prepare_frame().
Subsequent commits will work towards making the render_pass()
fragment-aware then ultimately moved to voronoi_render_fragment()
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This variant is kind of a broken hack, and its brokenness becomes
more apparent in a threaded voronoi world.
So just drop it for now.
I am interested in more voronoi variants, but they can't
compromise correctness/introduce instabilities or significantly
interfere with performance improvements like threaded rendering.
The dithered-ish look of dirty=on was an interesting variant
though... bummer.
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trivial change; voronoi_sample_colors() only reads from the fragment
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Like modules/checkers required for fill_module, we need to do the
same for for rtv::snow_module.
There's more work to do on rtv::channels, but that's still
unsettled stuff in terms of settings syntax since rtv randomizes
settings. It's desirable to have the rtv settings able to
specify which settings to hold constant at a specific value
per-channel, leaving everything else for randomizing on channel
switch.
But there's no syntax for that kind of stuff currently, and it
seems like there's a need to communicate during the setup_func
dance when we're in a "settings optional because we'll fill them
in automatically at time of use later" to the front-end.
It's not strictly a front-end issue though - because the back-end
setup_func actually controls the forward progress. From the
current setup_func's perspective, everything's important to it
and must be fulfilled. And we certainly want the setup_func to
continue informing the setup process.
So it's more like the channel settings being populated via rtv
still need to all get populated, rtv just needs a way to add an
attribute to mark which settings are static vs. which should get
randomized on every use.
Perhaps there should just be a special value syntax reserved for
saying "random value" and the front-end can apply that, but then
a til_module_randomize_setup() could detect that too in a
per-setting flag the front-end set. That way the value gets
re-randomized, while the ones without that value set get left
alone.
Yes, I know this isn't the appropriate place for such commentary.
But nobody is reading these things anyways on my toy side project.
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This is harmless as long as rtv stays hermetic.
But if rtv gets used in a composite scenario in the future by
either removing the hermetic flag, or allowing forced overrides,
n_cpus=0 will cause the nested module contexts to become threaded
on SMP machines.
That's problematic if the outer module context is already a
threaded render. What's appropriate here is to just propagate
the n_cpus down so if an upper layer has already gone threaded,
it will be sending down n_cpus=1 to serialize the nested
instances.
In practice, as-is, this change basically changes nothing, but
prepares for a potential future where rtv participates in
threaded compositions.
Through a lens of "rtv just rejiggers scenes and there settings
on a timer from a settings-specified subset of modules and
settings" it's arguably useful as just another module. Sometimes
you want something to change itself up periodically in say a
compose layer.
So preparing for this possibility isn't really all that
far-fetched/hypothetical.
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This commit introduces setting path printing to interactive
setup, making it much more clear what on earth you're setting up
in more complex scenarios.
e.g. an interactive setup of module=compose is now:
```
$ src/rototiller --module=compose
/module/compose/layers:
Comma-separated list of module layers, in draw-order [drizzle,stars,spiro,plato]:
/module/compose/layers/[0]/drizzle/viscosity:
Puddle viscosity:
0: .005
1: .01
2: .03
3: .05
Enter a value 0-3 [1 (.01)]:
/module/compose/layers/[0]/drizzle/style:
Overlay style:
0: mask
1: map
Enter a value 0-1 [0 (mask)]:
/module/compose/layers/[1]/stars/rot_adj:
Rotation rate:
0: .0
1: .00001
2: .00003
3: .0001
4: .0003
5: .001
Enter a value 0-5 [2 (.00003)]:
/module/compose/layers/[3]/plato/orbit_rate:
Orbit rate and direction:
0: -1
1: -.75
2: -.5
3: -.25
4: .1
5: 0
6: .1
7: .25
8: .5
9: .75
10: 1
Enter a value 0-10 [7 (.25)]:
/module/compose/layers/[3]/plato/spin_rate:
Spin rate and direction:
0: -1
1: -.75
2: -.5
3: -.25
4: .1
5: 0
6: .1
7: .25
8: .5
9: .75
10: 1
Enter a value 0-10 [9 (.75)]:
/module/compose/texture:
Module to use for source texture, "none" to disable:
0: none
1: blinds
2: checkers
3: drizzle
4: julia
5: moire
6: plasma
7: roto
8: stars
9: submit
10: swab
11: voronoi
Enter a value 0-11 [0 (none)]: 1
/module/compose/texture/blinds/orientation:
Blinds orientation:
0: horizontal
1: vertical
Enter a value 0-1 [0 (horizontal)]:
/module/compose/texture/blinds/count:
Blinds count:
0: 2
1: 4
2: 8
3: 12
4: 16
5: 24
6: 32
Enter a value 0-6 [4 (16)]: 3
/video:
Video backend:
0: drm
1: mem
2: sdl
Enter a value 0-2 [2 (sdl)]:
/video/sdl/fullscreen:
SDL fullscreen mode:
0: off
1: on
Enter a value 0-1 [0 (off)]:
/video/sdl/size:
SDL window size [640x480]:
Configured settings as flags:
--seed=0x6471f827 '--module=compose,layers=drizzle\\\,viscosity\\\=.01\\\,style\\\=mask\,stars\\\,rot_adj\\\=.00003\,spiro\,plato\\\,orbit_rate\\\=.25\\\,spin_rate\\\=.75,texture=blinds\,orientation\=horizontal\,count\=12' '--video=sdl,fullscreen=off,size=640x480'
Press enter to continue, add --go to skip this step...
```
Previously it would be like so:
$ src/rototiller --module=compose
Comma-separated list of module layers, in draw-order [drizzle,stars,spiro,plato]:
Puddle viscosity:
0: .005
1: .01
2: .03
3: .05
Enter a value 0-3 [1 (.01)]:
Overlay style:
0: mask
1: map
Enter a value 0-1 [0 (mask)]:
Rotation rate:
0: .0
1: .00001
2: .00003
3: .0001
4: .0003
5: .001
Enter a value 0-5 [2 (.00003)]:
Orbit rate and direction:
0: -1
1: -.75
2: -.5
3: -.25
4: .1
5: 0
6: .1
7: .25
8: .5
9: .75
10: 1
Enter a value 0-10 [7 (.25)]:
Spin rate and direction:
0: -1
1: -.75
2: -.5
3: -.25
4: .1
5: 0
6: .1
7: .25
8: .5
9: .75
10: 1
Enter a value 0-10 [9 (.75)]:
Module to use for source texture, "none" to disable:
0: none
1: blinds
2: checkers
3: drizzle
4: julia
5: moire
6: plasma
7: roto
8: stars
9: submit
10: swab
11: voronoi
Enter a value 0-11 [0 (none)]: 1
Blinds orientation:
0: horizontal
1: vertical
Enter a value 0-1 [0 (horizontal)]:
Blinds count:
0: 2
1: 4
2: 8
3: 12
4: 16
5: 24
6: 32
Enter a value 0-6 [4 (16)]: 3
Video backend:
0: drm
1: mem
2: sdl
Enter a value 0-2 [2 (sdl)]:
SDL fullscreen mode:
0: off
1: on
Enter a value 0-1 [0 (off)]:
SDL window size [640x480]:
Configured settings as flags:
--seed=0x6471f827 '--module=compose,layers=drizzle\\\,viscosity\\\=.01\\\,style\\\=mask\,stars\\\,rot_adj\\\=.00003\,spiro\,plato\\\,orbit_rate\\\=.25\\\,spin_rate\\\=.75,texture=blinds\,orientation\=horizontal\,count\=12' '--video=sdl,fullscreen=off,size=640x480'
Press enter to continue, add --go to skip this step...
```
Which gets rather confusing, especially if you go even deeper
with nested module situations like
compose/layers/[0]/checkers/fill_module/compose/layers/[0]/drizzle
You just lose track of which module instance's settings you're
actually setting up
This is just the first step of making use of these paths. In the
future the module context paths will be derived from the settings
paths so they're more reliably distinct and descriptive, along
with consistent with paths in the settings namespace. That
becomes important when module contexts start getting registered
on the stream for use in other modules.
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These print to a stdio FILE*, which for now is harmless since
setup_interactively() will be the only consumer (... for now).
If one needed the path in a buffer, they could use
open_memstream() and pass that FILE* to the printers. And since
commit 40feb61 there's already a dependency on the function, but
it's icky to dig deeper into that portability trap.
Although it seemed like rototiller actually compiled on MacOS at
Gene's house, so maybe open_memstream() isn't as problematic as
it once was.
Anywhow, this commit only adds the path printing helpers, nothing
is using them yet.
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Currently settings instances get labels from three sources:
1. explicitly labeled by a root-level til_settings_new() call,
like main.c::til_settings_new(NULL, "video", args->video);
2. implicitly labeled in a spec.as_nested_settings w/spec.key
3. positionally labeled in a spec.as_nested_settings w/o spec.key
But when constructing setting/desc paths, using strictly these
settings instance labels as the "directory name path component"
equivalent, leaves something to be desired.
Take this hypothetical module setting path for example:
/module/layers/[0]/viscosity
Strictly using settings instance labels as-is, the above is what
you'd get for the drizzle::viscosity setting in something like:
--module=compose,layers=drizzle
Which is really awkward. What's really desired is more like:
/module/compose/layers/[0]/drizzle/viscosity
Now one way to achieve that is to just create more settings
instances to hold these module names as labels and things would
Just Work more or less.
But that would be rather annoying and heavyweight, when what's
_really_ wanted is a way to turn the first entry's value of a
given setting instance into a sort of synthetic directory
component in the path.
So that's what this commit does. When a spec has .as_label
specified, it's saying that path construction should treat this
setting's value as if it were a label on a settings instance.
But it's special cased to only apply to descs hanging off the
first entry of a settings instance, as that's the only scenario
we're making use of, and it avoids having to do crazy things like
search all the entries for specs w/.as_label set.
It feels a bit janky but it does achieve what's needed with
little pain/churn.
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7ff8ef94 switched things to always describe relevant settings,
but left some loose ends. Obvious fixups for those
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In this "all settings require descs" world, when setup_func
forgets to return a res_desc for a setting it wants, we can end
up in an infinite loop situation. It's better to abort
immediately on the assert to catch such a program error.
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Like modules/checkers required for fill_module, we need to do the
same for for compose.
It's a little more weird in compose since compose::layers is a
nested settings full of unnamed nested settings.
But compose::texture is analogous to checkers::fill_module.
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The bare-value value_as_nested_settings.entries[0] setting which
serves as the name for module lookup is in a sort of no-mans land
between checkers and the underlying fill_module's setup.
So we have to do this little bit of rigamarole in checkers, being
the entity wiring up the nested module. The fill_module's
setup_func won't be doing anything to describe the name's
setting as it's only interested in its own settings.
There will likely be some helpers made later to streamline this
process of composing module/settings hierarchies.
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Since these are ultimately intended for use in path construction,
it's redundant to include the settings->label in the generated
label. Instead what's really useful is just the subscript part:
/module/compose/layers/layers[0]/drizzle/viscosity
Becomes:
/module/compose/layers/[0]/drizzle/viscosity
which is far better. It may seem silly to have both the
positional subscript *and* the module name, as in why not just
have:
/module/compose/layers/drizzle/viscosity
But there's a need ot handle potential collisions like so:
/module/compose/layers/[0]/drizzle/viscosity
/module/compose/layers/[1]/stars
/module/compose/layers/[2]/drizzle/viscosity
So then maybe you think; ok, why have the module name? just use
the positional subscript since that alone prevents the
collisions. Result:
/module/compose/layers/[0]/viscosity
...
/module/compose/layers/[2]/viscosity
Well, now we've lost useful context. The viscosity setting
recurs on multiple modules, and we don't know just at a glance
what we're working with anymore.
Hence, why there's both. The module name in the path makes
things substantially more self-explanatory. These paths will
likely be what you're looking at as the labels of tracks in a
multitrack sequencer like GNU Rocket. So this decision is likely
affecting the UX at that level in the fullness of time.
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Since 1a8abe80dabd this ceased to be the right thing to do, since
there's no longer the whole bare-key setting with null value.
It's now always a value, and the key that's optional.
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Preparatory for constructing unique paths from a given
setting/settings instance by walking up the tree
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Using on/off for boolean settings is the established convention
in rototiller, rtv went rogue here.
Just make it consistent
Sometimes it feels like this should be more flexible and support
0/1 yes/no true/false on/off by just having "boolean" typed
settings. But I think it may actually pay off long-term to be so
opinionated here and making serialized settings heirarchies
directly hashable/comparable without major normalization steps
(nothing beyond say... case normalization).
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sig_t collides with some signals-related system header on macos.
Just prefix it under the sig namespace.. leaving sig_ops alone
for now, but maybe they'll become sig_sig_ops in the future too.
Note nothing in master actually uses libs/sig currently, but I
have an experimental branch with a dusty module using it.
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