ericandhideoneric 5b051861bc fix(blend): keep 32-bit Hue/Saturation/Color/Luminosity above 1 (#1735) ...

- Hue, Saturation, Color and Luminosity no longer clip 32-bit documents to 0..1, so values above 1 survive in the CPU compositor (blend_rgb_hdr now uses blend_rgb_within at f32::MAX) and in the GPU shader (under the existing F_HDR flag). 8/16-bit results are unchanged apart from rounding at white.
- ClipColor returns the grey when the luminosity is outside the in-gamut range, instead of dividing by max − lum rounding noise. The old formula turned colours inside out (Luminosity of a grey of 2 over (0.5, 0.25, 0.125) gave (1.0, 2.32, 2.99)), and CPU and GPU disagreed (Hue over a grey of 2: CPU 1.0, GPU 2.82).
- Tests: 8/16-bit inputs match the ISO 32000 formula, HDR cases in compose, psblend::with_hdr nesting, and a CPU/GPU parity test across depths.

Co-authored-by: hideoneric <hideoneric@users.noreply.github.com>

2026-10-10 13:15:18 -04:00

..

src

fix(blend): keep 32-bit Hue/Saturation/Color/Luminosity above 1 (#1735)

2026-10-10 13:15:18 -04:00

Cargo.toml

more algorithms, progress

2026-10-01 08:25:06 -04:00