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feat(plugin): expose the slicing print-graph as raw orca.host classes + Twistify sample

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Adds PluginHostSlicing, which registers the print-graph data model (Print,
PrintObject, Layer, LayerRegion, Surface, ExPolygon, extrusions, ...) into the
orca.host submodule in the same raw-class style as PluginHostApi's Model/Preset
graph, with shared helpers in PluginBindingUtils. SlicingPipelinePluginCapability
is trimmed to the capability surface (the standalone SlicingNumpy helper is folded
away). Adds the Twistify example plugin next to Inset and broadens the binding,
hook, and plugin-install tests.
This commit is contained in:
SoftFever
2026-07-08 00:05:28 +08:00
parent aafcccc83c
commit f81a24abfb
29 changed files with 1718 additions and 962 deletions
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30
src/slic3r/GUI/GUI_App.cpp
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@@ -3145,10 +3145,8 @@ bool GUI_App::on_init_inner()
[&](std::shared_ptr<Slic3r::SlicingPipelinePluginCapability> cap, const Slic3r::PluginCapabilityRef& ref) {
Slic3r::ExecutionResult r;
try {
// GIL is acquired per capability (not once for the whole dispatch) so it is
// released between capabilities. ctx is built inside this scope because
// ctx.owner is a py::capsule: it must be created and destroyed while the GIL
// is held (ctx destructs before `gil`, so its capsule is decref'd under GIL).
// GIL is acquired per capability (not once for the whole dispatch) so it
// is released between capabilities.
PythonGILState gil;
// throw_if_canceled() is protected on PrintBase; canceled() is the public
// equivalent check (same cancel flag), so honor cancellation via it.
@@ -3159,10 +3157,10 @@ bool GUI_App::on_init_inner()
ctx.step = step;
ctx.print = &print;
ctx.object = object;
// No-op-destructor capsule threaded into every zero-copy numpy array as its
// base. It references `print` but frees nothing: `print` is owned by libslic3r
// and outlives the hook, and arrays are valid only during this execute() call.
ctx.owner = pybind11::capsule(&print, [](void*) {});
// hand the plugin its own [tool.orcaslicer.plugin.settings] as ctx.params
// (same plugin_key the capability was resolved by, so it always matches).
const std::string plugin_key = ref.uuid.empty() ? ref.name : ref.uuid;
ctx.params = Slic3r::PluginManager::instance().get_loader().get_plugin_settings(plugin_key);
r = cap->execute(ctx);
} catch (const Slic3r::CanceledException&) {
throw; // cancellation must reach process(), never become a slicing error
@@ -3175,6 +3173,22 @@ bool GUI_App::on_init_inner()
if (r.status == Slic3r::PluginResult::FatalError)
throw Slic3r::SlicingError(std::string("Slicing pipeline plugin '") +
ref.capability_name + "' error: " + r.message);
// log a non-empty success/skipped message instead of dropping it. This is
// log-only by design: every pipeline hook fires AFTER set_done() (see Print.cpp),
// so the Print-level m_step_active is -1 here. Calling active_step_add_warning()
// would then index m_state[-1] (out-of-bounds; the guarding assert is compiled
// out in Release), so it must NOT be called from a pipeline hook.
if (!r.message.empty()) {
static const char* const kStepNames[] = {
"Slice", "Perimeters", "EstimateCurledExtrusions", "PrepareInfill", "Infill",
"Ironing", "Contouring", "SupportMaterial", "DetectOverhangsForLift",
"SimplifyPath", "WipeTower", "SkirtBrim"
}; // order must match Slic3r::SlicingPipelineStep
const char* step_name = static_cast<size_t>(step) < sizeof(kStepNames) / sizeof(kStepNames[0])
? kStepNames[static_cast<int>(step)] : "Unknown";
BOOST_LOG_TRIVIAL(info) << "Slicing pipeline plugin '" << ref.capability_name
<< "' [" << step_name << "]: " << r.message;
}
});
});