Crate hokusai

Expand description

Hokusai — pure Rust brush engine inspired by libmypaint.

Umbrella crate that re-exports the active backends based on cargo features.

Modules§

brush: The Brush value: a full configuration consumed by the stroke engine.
brushmodes: Pixel blending — port of libmypaint’s brushmodes.c.
color: Color types. Internal pipeline is linear sRGB; HSV is used at brush configuration boundaries (matches libmypaint).
evaluator: Setting evaluator: turn a Brush + normalized input values into the per-setting evaluated values needed by the dab loop.
fix15: Fixed-point pixel math matching libmypaint’s fix15 representation.
input: Brush inputs — drivers fed by the application each stroke_to call.
mapping: Per-setting input → value mapping (piecewise-linear, matches libmypaint).
myb
rng: libmypaint-compatible PRNG.
setting: Brush settings — 1:1 with libmypaint’s brushsettings.json keys.
spectral: Spectral upsampling / downsampling for libmypaint’s pigment-style “paint” blend mode.
state: Per-stroke mutable state. Mirrors libmypaint’s MyPaintBrush runtime fields so the stroke engine port can be a near-line-for-line translation.
stroke: Stroke engine — port of libmypaint’s mypaint_brush_stroke_to.
surface: TiledSurface abstraction and the Dab description passed to it.
tile: 64×64 RGBA fix15 tile — matches libmypaint’s tiling so brush math, tile traversal order, and rounding behaviour can be made bit-identical.
tile_mem