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bflatasticandClaude Opus 5.5
42ad4540b7
With alignDashes every run between corners and path ends holds a whole number of periods, scaled to fit, with a dash (or dot) centred on each corner and on both ends of an open path. It lives in the shared dash generator, so the canvas, SVG and PDF export (as outlines) and Outline Stroke all draw it. stroke.set: alignDashes and dashOffset edit the current pattern on their own, and a new dash array keeps the offset and alignment it replaces. The Stroke panel turns dashes on fitted to corners (or as last turned off), and its Exact/Fit buttons send only the flag. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
42 lines
1.9 KiB
Rust
42 lines
1.9 KiB
Rust
//! Dashes fitted to corners export as the canvas's filled outlines (a dash array can't fit them);
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//! exact dashes stay a `stroke-dasharray`. Checked by rendering the exported SVG with resvg.
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use vectorcraft_color::{Color, Paint};
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use vectorcraft_doc::{Appearance, AppearanceItem, Dash, Document, Node, StrokeLayer};
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use vectorcraft_geom::{Rect, shapes};
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use vectorcraft_svg::{ExportOptions, export};
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use vectorcraft_testkit::raster::{Image, assert_similar, render_artboard};
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fn rect_doc(align_corners: bool) -> Document {
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let mut d = Document::new(140.0, 90.0);
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let mut st = StrokeLayer::new(Paint::solid(Color::BLACK), 4.0);
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st.dash = Some(Dash { pattern: vec![12.0, 6.0], offset: 0.0, align_corners });
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let n = Node::path(
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d.alloc_id(),
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shapes::rectangle(Rect::new(20.0, 20.0, 120.0, 70.0)),
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Appearance { items: vec![AppearanceItem::Stroke(st)], effects: vec![] },
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);
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let l = d.layers[0].id;
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d.insert(Some(l), 0, n).unwrap();
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d
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}
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/// The SVG rendered by resvg on white at 1 px/pt.
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fn resvg_render(svg: &str, w: u32, h: u32) -> Image {
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let tree = resvg::usvg::Tree::from_str(svg, &resvg::usvg::Options::default()).expect("parse");
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let mut pm = resvg::tiny_skia::Pixmap::new(w, h).unwrap();
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pm.fill(resvg::tiny_skia::Color::WHITE);
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resvg::render(&tree, resvg::tiny_skia::Transform::identity(), &mut pm.as_mut());
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Image { width: w, height: h, rgba: pm.data().to_vec() }
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}
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#[test]
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fn fitted_dashes_export_as_outlines_that_render_like_the_canvas() {
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let d = rect_doc(true);
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let svg = export(&d, &ExportOptions::default());
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assert!(!svg.contains("stroke-dasharray") && !svg.contains("stroke="), "{svg}");
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assert_similar(&render_artboard(&d), &resvg_render(&svg, 140, 90), 24.0, 0.002);
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// Exact dashes are still a dash array.
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assert!(export(&rect_doc(false), &ExportOptions::default()).contains("stroke-dasharray=\"12 6\""));
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}
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