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vectorcraft/crates/effects/src/lib.rs
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jmvergesandClaude Opus 5.5 543034987e Envelopes: type's strokes paint at their own weight along the bent outlines (#6644)
With Envelope Options > Distort Appearance on, VectorCraft turned the strokes
of type in an envelope into filled outlines and bent them with the art, so a
stroke got thinner where the grid squeezes the type and thicker where it
stretches it. The drawn art of users' .ai files keeps those strokes as stroked
paths at the type's own weights, and the ring they paint is as wide wherever
the grid squeezes or stretches the type. An envelope of stroked type in such a
grid therefore didn't draw as its drawn art and kept it instead of opening live.

Type's strokes (its characters' and those on its own appearance) now paint
along the bent glyph outlines at their own weight, with Distort Appearance on
or off, also in an envelope inside an envelope:

- doc: `map_node` maps the groups that hold type's glyph outlines with
  `Hooks::type_appearance` in place of `Hooks::appearance`, for type in the
  envelope's contents and for type that a live object in them (an inner
  envelope) outlined (`Warper::type_outlines`). Such a group's opacity mask
  is mapped with the ordinary hooks, so it bends as other art does. Groups
  marked as type's outlines in the contents themselves (art an earlier Expand
  made) stay plain art.
- effects: `bake_type_appearance`, `bake_appearance` with strokes kept as
  strokes: geometry effects on type's fills and strokes still bake in and bend.
- doc: `max_outset` counts type's character strokes as type's own visual
  bounds do (`char_stroke_outset`). It left them out, though they already
  painted past an envelope's grid where the glyphs reach its edge; this also
  grows the visual bounds of blends and repeats of stroked type and the reach
  of symbol art holding it.

Paths' strokes, geometry effects, opacity masks, linear gradients and pattern
fills bend as before. The canvas, hit testing, effect bounds, Expand, every
export and the .ai save take the evaluation from the same hooks. Expand of an
envelope of stroked type gives the bent outlines with the strokes on them.
This changes how VectorCraft's own envelopes of stroked type draw.

Tests: envelope_distort::type_strokes_paint_at_their_own_weight_in_a_squeezed_envelope,
a_stroke_on_types_appearance_paints_at_its_own_weight_in_a_squeezed_envelope,
type_strokes_paint_at_their_own_weight_in_an_envelope_inside_an_envelope,
a_paths_stroke_still_bends_in_a_squeezed_envelope,
an_opacity_mask_on_type_bends_as_other_art,
the_visual_bounds_of_an_envelope_hold_its_types_strokes,
the_visual_bounds_of_a_repeat_of_stroked_type_grow_by_half_the_stroke,
expanding_an_envelope_of_stroked_type_keeps_the_stroke_at_its_weight,
bake::tests::type_pieces_bake_their_geometry_effects_and_keep_their_strokes and
tests_native::an_envelope_of_stroked_type_whose_drawn_art_strokes_the_bent_outlines_at_the_weight_opens_live.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-11-11 20:45:33 +00:00

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//! VectorCraft live effects (Illustrator's Effect menu).
//!
//! Effects live in appearance stacks as [`Effect`] `{id, params, visible}` records. This crate
//! interprets them:
//!
//! - **Geometry effects** (Distort & Transform, Path, Convert to Shape, Round Corners, Scribble,
//! Warp) rewrite a path: [`apply_geometry`] evaluates them in stack order.
//! - **Raster effects** (Drop Shadow, Inner/Outer Glow, Feather, Gaussian Blur, Rasterize, and the
//! Photoshop-style filters of [`pixel`]: Radial Blur, Smart Blur, Color Halftone, Crystallize, Mezzotint, Pointillize, Halftone Pattern,
//! Unsharp Mask and Glowing Edges, and the SVG filters of [`svg_filter`]) are described by
//! [`raster_effects`] and painted by the renderer; [`outset`] says how far they reach beyond
//! the geometry.
//! - **Stroke geometry** ([`stroke`]): arrowheads, dash patterns and width profiles, shared by the
//! renderer, the exporters and Outline Stroke.
//! - [`effect_catalog`] lists every effect with its menu path, parameter documentation and
//! default values. Missing parameters always fall back to those defaults.
//! - [`reshape`] applies geometry effects to type, images, symbol instances and live objects
//! through their outlines.
//! - [`evaluate_container`] turns a group's or layer's own fills, strokes and geometry effects into
//! art painting its members (its raster effects then apply to the composite).
//! - [`clip_outline`] is the region a clip group clips to, shared by the renderer and the SVG and
//! PDF writers.
//! - [`preview`] measures objects as they are drawn, with their geometry effects (Use Preview
//! Bounds).
//! - **Plug-in effects** (`plugin.<plug-in id>`, Effect › Plug-ins) are geometry effects run by an
//! installed WebAssembly plug-in (`vectorcraft-plugins`); [`effect_info`] describes them like
//! built-in ones, and an effect whose plug-in isn't installed leaves the geometry as it is.
//! - **Colour adjustments** (Brightness/Contrast, Curves, Levels, Hue/Saturation, Shift to Color,
//! Temperature/Tint) recolour what an object paints with: [`adjust`] evaluates them for the
//! renderer and the exporters.
//!
//! Everything is deterministic: "random" effects (Roughen, Tweak, Scribble) use a seeded hash
//! noise (`seed` parameter, default 0); the random Pixelate filters hash their pattern's cells,
//! anchored at the object's centre.
#![forbid(unsafe_code)]
pub mod addons;
mod adjust;
mod bake;
mod clip;
mod distort;
mod group;
mod lighting;
mod lighting_presets;
mod live;
mod marks;
pub mod pixel;
pub mod preview;
mod raster;
mod reshape;
mod revolve;
mod solids;
pub mod stroke;
mod stylize;
pub mod svg_filter;
pub mod trap;
mod util;
mod warp;
#[cfg(test)]
mod tests;
use serde_json::{Map, Value, json};
use vectorcraft_doc::{Appearance, AppearanceItem, Effect, Node, NodeKind, StrokeLayer};
use vectorcraft_geom::{BezPath, FillRule, PathData, Rect};
pub use adjust::{
ADJUSTMENTS, CHANNELS, ColorMap, ImageHook, adjust, adjust_in_document, color_map, curve_at, curve_points, has_adjustment, is_adjustment,
is_channel,
};
pub use bake::{StrokeArt, bake_appearance, bake_document, bake_type_appearance, expand_art, expand_leaf, fresh_ids, needs_bake};
pub use clip::clip_outline;
pub use group::{
OutlineHook, PATHFINDER_EFFECTS, compound_shape_area, compound_shape_art, evaluate_container, has_container_appearance, has_pathfinder,
is_pathfinder, member_leaves, member_shapes, paints, pathfinder_children, shape_art,
};
pub use lighting_presets::{LIGHTING_PRESETS, LightingPreset, lighting_preset_params, matching_lighting_preset};
pub use live::{expand_live, expand_live_deep, expanded_live_group, outline_object, text_outliner};
pub use marks::{CROP_MARKS, crop_marks_art, has_crop_marks};
pub use pixel::{PIXEL_EFFECTS, PixelFx, PixelSpace};
pub use raster::{RASTERIZE, RasterFx, Rasterize, color_param, outset, raster_effects};
pub use reshape::{
SYMBOL_ART_MAX_NODES, expand_outlined, gives_image_shape, has_gradient_copies, has_item_geometry, has_painted_effects, has_transform_art,
has_transform_copies, has_transform_options, image_paint, needs_outline, outline_art, outline_text, reshape,
};
pub use revolve::{REVOLVE, has_revolve, revolve_art, revolve_art_in, revolve_options, validate_revolve, validate_revolve_in};
pub use solids::{
CLASSIC_EXTRUDE, EXTRUDE, INFLATE, ROTATE, ROTATION_PRESETS, SHADING_COLORS, SOLIDS, SolidMesh, THREE_D_TYPES, classic_extrude_options,
classic_shading, extrude_options, has_solid, inflate_options, is_three_d, solid_art, solid_art_in, three_d_meshes, three_d_meshes_in,
three_d_meshes_of, three_d_meshes_of_in, three_d_params_as, validate_solid, validate_solid_in, validate_three_d, validate_three_d_at,
validate_three_d_at_in, validate_three_d_in, validate_three_d_params, view_options,
};
pub use stylize::{ScribbleSetting, scribble_setting_id, scribble_settings};
pub use svg_filter::SVG_FILTER;
pub use trap::TRAP;
pub use vectorcraft_three_d::Mesh;
pub use warp::{WarpStyle, warp_point};
mod catalog;
mod geometry;
mod params;
pub use catalog::{EffectInfo, Lengths, WARP_STYLES, effect_catalog, effect_info, is_length, length_range, plugin_effects, raster_px_range};
pub(crate) use geometry::{Budget, apply_one};
pub use geometry::{
Carry, GeomContext, apply_geometry, apply_geometry_bez, apply_geometry_bez_carrying, apply_geometry_carrying, apply_geometry_with,
};
#[cfg(test)]
pub(crate) use geometry::{MAX_EFFECT_LINES, apply_geometry_within};
pub use params::{
any_plugin_paints_output, default_params, has_geometry, has_painted_plugin_effect, has_plugin_effect, is_geometry, is_raster, merged_params,
new_effect, plugin_revision, scale_effect, upgrade_params,
};