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bflatastic
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Effect › Color Effects › Vector Halftone… (addon.color.halftone, also in Object › Plug-ins › Color Effects) draws its object as the halftone dots Object › Vector Halftone makes, live: mono (one dot colour, or each dot in the art's colour under it) or CMYK screens, the five dot shapes, frequency, angle, invert and clip to the art's outline. - The screens, dots and caps move to vectorcraft_effects::addons::halftone, shared by the command (its behaviour and tests unchanged) and the effect. - The renderer samples the art (vectorcraft_render::addons::halftone) and keeps the dots by the object's content and what it reads from the document, so unchanged art isn't sampled again; past 100000 cells per screen the object draws as it is. - Expand Appearance turns the object into its dots, and the SVG, PDF, EPS and AI exporters write them as paths. - Its dialog reuses the command's fields, without Keep Original. Deferred: stochastic and radial patterns, a dot-gain curve, per-screen separation settings, type or symbols as dots.
69 lines
3.0 KiB
Rust
69 lines
3.0 KiB
Rust
//! Object → Vector Halftone: the dot shape, the screen frequency and angle, mono (in one colour)
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//! or CMYK screens, Invert, Clip to Art and Keep Original, previewed live on the canvas; OK keeps
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//! the preview as one undo step (`object.vectorHalftone`).
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//!
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//! Fields: `shape`, `frequency`, `angle`, `mode`, `color`, `invert`, `clip`, `keepOriginal` (the
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//! command's parameters) and `preview`. The live effect's dialog shows the same fields but Keep
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//! Original ([`screen_fields`]).
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use serde_json::{Value, json};
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use vectorcraft_color::Color;
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use super::{DialogSpec, form};
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use crate::panels::c32;
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use crate::state::Dialog;
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use crate::{VectorcraftApp, widgets};
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/// The dialog kind of Vector Halftone.
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pub const KIND: &str = "vectorHalftone";
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const CMD: &str = "object.vectorHalftone";
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/// Width of the label column.
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const LABEL_W: f32 = 84.0;
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pub(super) const SPEC: DialogSpec = DialogSpec { heading: |_| tl!("Vector Halftone").into(), body, confirm, preview: true, ..DialogSpec::FORM };
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/// The dialog's fields as it opens: the command's defaults, previewed.
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pub fn fields() -> Value {
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json!({"shape": "circle", "frequency": 20, "angle": 45, "mode": "mono", "color": "#000000", "invert": false, "clip": true, "keepOriginal": false, "preview": true})
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}
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fn body(app: &mut VectorcraftApp, ui: &mut egui::Ui, d: &mut Dialog) -> bool {
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screen_fields(ui, d);
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form::check(ui, d, "keepOriginal", tl!("Keep Original"));
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let p = form::params(d);
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form::preview(app, ui, d, "Vector Halftone", CMD, p);
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false
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}
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/// The fields Object › Vector Halftone and the live effect (Effect › Color Effects › Vector
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/// Halftone…) share: the dot shape, the screen frequency and angle, mono or CMYK screens, the dot
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/// colour (or, with the effect's `fromArt`, the art's), Invert and Clip to Art.
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pub(super) fn screen_fields(ui: &mut egui::Ui, d: &mut Dialog) {
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let shapes =
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[("circle", tl!("Circle")), ("ellipse", tl!("Ellipse")), ("square", tl!("Square")), ("diamond", tl!("Diamond")), ("line", tl!("Line"))];
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form::choice(ui, d, "shape", tl!("Shape"), (LABEL_W, 140.0), &shapes);
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form::slider_w(ui, d, ("frequency", tl!("Frequency"), LABEL_W), 1.0..=150.0, " lpi", &|x| c32(&Color::gray(1.0 - x)));
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form::slider_w(ui, d, ("angle", tl!("Angle"), LABEL_W), -90.0..=90.0, "°", &|x| c32(&Color::gray(0.2 + 0.6 * x)));
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form::choice(ui, d, "mode", tl!("Screens"), (LABEL_W, 140.0), &[("mono", tl!("Mono")), ("cmyk", tl!("CMYK"))]);
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if d.str("mode") != "cmyk" {
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if d.fields.contains_key("fromArt") {
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form::check(ui, d, "fromArt", tl!("Dot Color from Art"));
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}
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if !d.bool("fromArt") {
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widgets::label_row(ui, tl!("Color"), LABEL_W, |ui| {
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form::text(ui, d, "color", 120.0);
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});
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}
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}
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ui.add_space(4.0);
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for (key, label) in [("invert", tl!("Invert")), ("clip", tl!("Clip to Art"))] {
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form::check(ui, d, key, label);
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}
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}
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fn confirm(app: &mut VectorcraftApp, d: &Dialog) -> Result<Value, String> {
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form::commit_preview(app, CMD, form::params(d))
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}
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