A dashed stroke is cut into dashes with corners wherever they fall round
the outline, and a width profile or a brush can give the stroke corners
of its own. A drop shadow's spread mitres those corners out, but a whole
ellipse or a box still counted as growing by exactly its spread, so the
shadow was cut off at the layer's edge (up to 255 levels).
Such a node now gets the room a star does. Whether the outline's own
mitres end on its box is a check of its own, which the stroke's reach
keeps using, so a node with no spread keeps its bounds.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* M8: an arc's spread shadow gets room for its mitred corners
Rectangles, frames and ellipses grow by exactly their spread, so their
layers only make room for the spread itself; other shapes make room for
the mitre at sharp corners (up to four times the spread). An ellipse
with arc data (a pie slice, or a ring cut short) counted as an ellipse,
but its ends meet its sides in sharp corners: a spread of 25 on a slice
of 0.3 rad cut its shadow off at the layer's edge (up to 255 levels).
Only an ellipse that goes all the way round now grows by exactly its
spread. `figcraft_geom::full_sweep` is what `ellipse` already used to
tell a whole ellipse or ring from an arc, so the two agree.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
* M8: an arc's mitred stroke gets room for its corners too
Review: `outline_reach` counted every ellipse as an outline whose stroke
mitres end on the grown box, the same mistake as the spread. A thin
slice with a 20-unit mitred stroke and a spread of 10 still had its
shadow cut off (255 levels). It now asks `grows_by_exactly_its_spread`,
which picks the same shapes and leaves arcs out.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
- Background blur sees the whole backdrop under the layer: the renderer keeps the stack of
isolated surfaces it draws into (clipping frames, rounded clips, faded groups, masks) and
flattens it for the layer's area, reading past the layer's own box. A blur inside a clipping
frame now shows the frame's fill instead of the sharp layers below, on the canvas and in PNG
exports. The PDF export draws background blur and glass through the same code from a render of
what lies under the node (`backdrop::render_beneath`, which the PDF's backdrop now shares), and
its images match the PNG's pixels.
- Shadow spread offsets the outline: the shape filled and stroked twice the spread wide with
mitred joins (grow) or cut away (shrink), the stroked bands cached per outline. Ellipses stay
ellipses, stars keep sharp points, text keeps its letterforms, rounded corners grow their
radius. Inner shadows shrink the outline the same way. Canvas, PNG and PDF share the shadow
code; SVG writes spread shadows as the same geometry and now exports inner shadows.
- Glass effect (light angle and intensity, refraction, depth, dispersion, frost, splay): the
frosted backdrop bent towards the inside within `depth` of the edge, colour fringes, light on
the rim, from an exact distance transform with smoothed normals.
- Noise: mono, duo and multi colour modes, grain size, density, opacity and blend mode; grains
live in the layer's coordinates (stable when panning and zooming). Texture is now drawn
(pixels scattered by the radius, grain size, clip to shape).
- Design panel rows for noise mode/colours/opacity, texture clip to shape and every glass value;
`effect.add` takes `glass`; REST import of NOISE, TEXTURE and GLASS; Inspect rows and CSS;
the scale tool scales grain sizes, texture radius, glass depth and frost.
- Tests in new modules: render backdrop/spread/grain tests, PDF backdrop tests, SVG, doc,
engine and REST effect tests.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
