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photocraft/crates
cbcdeb2549 Layer styles: Photoshop's measured contour presets; Satin's contour lookup (#3803)
* fix(effects): Photoshop's measured contour presets; Satin reads contours from the far end

The built-in contour presets were hand-drawn guesses and none matched
Photoshop. They are now Photoshop 27.11's own curves, measured by running
a Satin with each preset against a Linear one (38 levels per curve,
thinned to within 1 %, straight segments).

The measurement also showed how Satin applies a contour: |c(1 - v) - c(1)|
(Cone and Cone - Inverted Satins are identical; a Gaussian Satin is 0.36
at 0.5 while the Gaussian on a glow is 0.64). New effects::satin_lut, used
by the CPU and GPU satin paths.

Probe results vs Photoshop (max level error): Satin with every preset
<= 3 (Cove - Shallow 9), was up to 128; Outer Glow Gaussian 38 -> 2,
Ring - Double 121 -> 15, Cone 48-52 -> 4-7; bevel Contour Cone at 100 %
range 27 -> 12. Corpus oracles unchanged (their stored curves are
symmetric). Gloss Contour is still off: that is the bevel's gloss model,
not the presets.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

* Layer style UI test: the Contour Editor on the measured Cone

The measured Cone preset has 18 points, all inner ones corners, so the
editor test moves point 1 between its neighbours and checks the corner
flags by position instead of the old three-point shape.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

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Co-authored-by: Claude Opus 5.5 <[email protected]>
Co-authored-by: Brandon Thomas <[email protected]>
2026-10-12 08:52:57 -04:00
..
2026-10-07 10:20:40 -04:00