dotCooCooandGert Pellin 1b744eae52 Gradients: conic gradients sweep the stops once around the center ...

A fourth gradient kind, conic (also accepted as `angle` or `conical`),
sweeps the stops once around the center (the gradient's start),
clockwise on the page from the vector, with a seam where the last stop
meets the first. A negative aspect mirrors the sweep, and reflecting an
object turns its sweep the other way, also for a conic without a
vector or with a flat extent.

- Gradient panel: a Conic button in the Type row; the Aspect Ratio
  field works for conic gradients and keeps a mirrored sweep mirrored.
- Gradient tool: the extent ellipse, aspect handle and center ring of a
  radial gradient, without a focal point.
- Rendering, swatch chips, transforms, warps, plug-in round trips, and
  Object > Expand into wedges or a mesh of columns around the center.
- Commands: a negative `aspect` is an error for linear and radial
  gradients, and so is a `focal` point for a conic gradient.
- PDF export writes a function-based shading whose calculator function
  turns the angle into the ramp, and PDF import reads a function-based
  shading that turns around the origin of its space back as a conic
  gradient, also when that origin lies outside the painted area. A
  PDF/A file, or a conic with more than 97 stops, gets an image
  instead.
- SVG export writes 360 solid wedges clipped to the shape for opaque
  stops and an image otherwise, and a linear gradient on characters.
- CSS export writes `conic-gradient(from ...)`, with the stops mirrored
  for a mirrored sweep.
- EPS and legacy .ai export write 360 solid wedges; the .ai editing data
  holds a linear gradient along the vector with the same stops.
- .af files: conical gradients open as conic gradients.
- An export that writes the gradient in another form gives a warning.

Supersedes #2326 and includes switch87's code from it.

Co-authored-by: Gert Pellin <gert@pellin.be>

2026-11-11 15:51:11 -08:00

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src

Gradients: conic gradients sweep the stops once around the center

2026-11-11 15:51:11 -08:00

Cargo.toml

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