Overlay::Spots(threshold): luminance minus its Gaussian blur (sigma relative to the long edge,
so the same specks show at any preview size), thresholded to white/black; the threshold slider
(0..100) raises sensitivity. Runs after either renderer like the other overlays (equivalence:
share of differing pixels, since the view is binary). Remove panel: Visualize Spots checkbox +
Threshold slider; UI command view.visualizeSpots (A) opens the Remove tool with the view on or
toggles it.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
pipeline::redeye: inside the user's ellipse the pupil is found on the source image (a fixed
grid in normalized coordinates, so previews and exports agree): weighted centroid and area of
red-dominant pixels (or, for pet eyes, of the brightest ones). Pupil Size scales the detected
disc; rendering in scene-linear light after white balance neutralizes the red where it is red
(iris and catchlights stay) and darkens it. CPU (lin stage) and GPU kernel redeye_k with an
equivalence test (both the GPU and the CPU scene-linear paths). Indexed controls
redEye.<i>.pupilSize/darken, redeye.add/delete commands, the Red Eye panel (selected eye's
sliders, delete) and the loupe tool (drag an ellipse, click to select).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Up to 8 OkLCh samples (pointColor.pick samples the colour after the mixer on a proxy render);
per sample hue/saturation/luminance shift, variance (compress/expand the spread around the
sample) and an overall + per-axis range with soft edges, applied after the colour mixer in
ColorOps and its WGSL twin (equivalence case). Indexed control specs
(pointColor.<i>.hueShift …) so develop.set/controls/MCP address each sample. Visualize range
is a render overlay (RenderRequest::overlay) drawn after either renderer: the sample's own
edit is left out and colours outside the range turn grey. Point Color flyout in the Color
section with swatches, eyedropper, sliders, visualize and delete.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
curve.refineSaturation (0..100, default 100 = the curve's own saturation): after the tone
curves, the chroma around luma is rescaled so saturation moves from the curve's towards the
pre-curve value, keeping the curve's tone. CPU (finish::refine_saturation) and GPU twin,
equivalence case, slider under the curve editor, crs:CurveRefineSaturation import.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
White-preserving primaries matrix (OkLCh hue rotation / chroma scale of each Rec.2020
primary) plus a luminance-preserving green/magenta shadows tint, applied in scene-linear
light before the tone map. CPU (colorops::calibrate) and GPU (finish.wgsl) with an
equivalence case; seven control specs (calibration.*), a settings group, crs: import
(ShadowTint, Red/Green/BlueHue/Saturation) and a Calibration section at the bottom of the
Edit panel.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The source is uploaded once per view (kept with the GPU stages) and resampled on
the device: orientation as an integer pixel map, the Mitchell area prefilter
with the CPU's exact taps, then one bilinear resample through the
crop/straighten/flip affine or through the full warp (inverse perspective,
manual distortion, embedded DNG WarpRectilinear per plane, lateral CA, manual
and embedded vignetting gain, blank outside the source). `Frame::sample_plan`
(new) decides prefilter size and mode for both renderers; sources larger than
the device's buffer limit are still resampled on the CPU.
Equivalence: all 8 orientations with and without crop/straighten/flip, embedded
lens + perspective: max 1 LSB.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Linear and radial gradients, luminance and colour ranges and brush strokes are
evaluated by a WGSL kernel per component, combined (add/subtract/intersect,
component and mask invert, amount) into one device buffer of alpha planes that
the per-pixel stage reads directly. Brushes use the CPU's dabs
(`masks::brush_dabs`, shared with the rasterizer) and the closed form of the
flow accumulation (1 − Π(1 − a·flow), capped at density). Sky / Subject /
Background and other heuristic shapes, and brushes of more than 4096 dabs, are
evaluated on the CPU inside the same render and uploaded.
New equivalence case with CPU-evaluated shapes, subtract/intersect and amount;
all cases stay at max 1 LSB.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
New L3 crate `lightcraft-gpu`: a wgpu device (Metal/Vulkan/DX12; none on wasm32),
WGSL kernels compiled once, buffer/dispatch/readback helpers, and a renderer that
runs the per-pixel stage (tone map, highlights/shadows, clarity/texture/sharpen,
dehaze, local mask terms, OkLCh colour ops, grading, vignette, gamut map, sRGB
encode, curves, grain) on the device. Earlier stages still run on the CPU and are
uploaded (per-stage hybrid). Stage results are cached per view next to the CPU
StageCache (new `StageCache::extension`).
The CPU pipeline stays the oracle and shares its resolved parameters with the
kernels: `finish::FinishParams` / `mask_terms`, `pipeline::plan` (stage-cache keys),
`local::plane_sigmas` / `nr_params` / `wb_matrix_for`, exact LUTs and OkLab
matrices exported for the shader prelude. Equivalence tests (skip without an
adapter): mean |d| < 0.5 LSB, max <= 3 LSB; measured max 1 LSB on Apple M4 Pro.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
