SVG export ignored an image's colorize paint and wrote the image's own
black, white and gray pixels. EPS export flattened every colorized image
into a process-color raster, so a spot color lost its plate. Both now
write the image in the fill color, with the coverage the canvas and PDF
export use (darkness times alpha), so white and transparent pixels take
no color.
- SVG writes a coverage PNG as a mask over a rectangle in the color,
shared between repeated images while each keeps its own color. Linked
mode writes the coverage PNG as a file, and SVG Tiny 1.2 writes a PNG
in the color. A colorized image whose pixels are missing, or whose
grayscale pixels can't be decoded, is left out with a warning.
- EPS writes fully covered or uncovered pixels as an imagemask in the
color's process or Separation ink (Registration on every plate), and a
grayscale image as ink samples scaled by coverage. Level 3 masks its
uncovered pixels out and Level 2 writes them white; gray midtones are
written over white, with the existing warnings.
- EPS flattening no longer counts a solid colorize paint on a grayscale
or 1-bit image as transparency by itself. Opacity, blending modes,
opacity masks, effects and overlapping transparent art still flatten
it, and so does a colorize paint the writer can't draw.
The svg crate's tests turn on resvg's raster-images feature to render
the embedded PNGs.
Docs: docs/mcp.md, docs/target-app-parity.md.
With Styling set to Internal CSS, Inline Style or Style Entities, font-size
and letter-spacing were written as bare numbers. Only presentation attributes
take a bare number; in CSS a browser drops them, so the type was drawn at its
default size. They are now written in px, SVG's user unit, and presentation
attributes keep bare numbers.
Envelope Options stored Anti-Alias and Preserve Shape Using, but nothing that
draws an image read them: a distorted image was always smoothed and always
cut into clip groups.
- With Anti-Alias off, each piece of a distorted image is marked pixelated
(saved as `pixelated`). The renderer draws it with nearest-neighbor
sampling and without mips, SVG export writes `image-rendering: pixelated`,
and PDF export writes it without /Interpolate.
- With Preserve Shape Using Transparency, each piece is the image with a
white opacity mask in the piece's shape instead of a clip group. The
renderer paints an image whose mask is one plain white path straight into
that path, as it does for an image in a clip group, when the path lies
inside the image's frame.
Docs: docs/mcp.md, docs/target-app-parity.md.
Writer::fresh_id probed prefix-1, prefix-2, ... from 1 on every call,
formatting and hashing each candidate, so writing N gradients, clip
paths or masks cost O(N^2). Ids are never released, so every number
below the last one handed out for a prefix is taken: remember where
the search for each prefix stopped and resume there. The ids written
are the same as before.
examples/still-life.vectorcraft (12k gradients, 6.3 MB SVG) exported
in about 8.6 s (median); it now takes about 0.15 s. Output is byte-identical
for every document in examples/.
Add crates/engine/examples/export_bench.rs to time document.export
on the example documents, and a test pinning the generated id
sequence when object names already take some of the numbers.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
dotCooCoo