Changelog

0.1.0.1

Bug Fixes

• Fix arc segments silently replaced with straight lines in Boolean ops and PathOps
• Fix arc length measurement using straight-line distance instead of true arc length
• Fix subpath potential overflow when t0 is very close to 1
• Fix test suite leaving temporary SVG files in project root

Improvements

• cubicLength now uses adaptive flattening instead of uniform sampling for better accuracy
• grad2D expanded from 4 to 8 gradient directions for better noise isotropy
• 100% Haddock coverage across all 17 modules (was 64%)
• Document Sutherland-Hodgman convexity requirement on intersection and difference
• Document union behavior with non-overlapping polygons
• Document intersectEpsilon as absolute tolerance
• 9 new tests (294 total): arc flattening, arc measurement, arc boolean ops, subpath edge case, saturate safety, noise determinism, arcToCubics validation

Internal

• Add directory to test suite dependencies for temp file cleanup

0.1.0.0

Initial release.

Core Types

• V2 2D vector, Segment (line/cubic/quad/arc), Path (closed/open)
• Color type with RGBA in [0, 1] — rgb, rgba, rgb8, hex constructors
• 43 named colors, lerp, withAlpha, toHex
• hsl, hsla — HSL color construction
• Oklab perceptual color space: toOklab, fromOklab, lerpOklab
• Color adjustments: lighten, darken, saturate, desaturate, invert

Element Tree

• Element recursive sum type — style and transforms as wrapping constructors
• Compose via function application or left-to-right with (&)
• Semigroup/Monoid instance via EGroup

Shapes

• circle, rect, roundedRect, ellipse, polygon, star
• line, square, regularPolygon, arc, ring

Path DSL

• buildPath — run a PathBuilder monad to produce a Path
• PathBuilder actions: startAt, lineTo, cubicTo, quadTo, arcTo, closePath
• polylinePath, polygonPath convenience constructors

Path Operations

• reversePath, measurePath — reversal and arc length
• splitPathAt, subpath — splitting and extraction
• offsetPath — parallel curve approximation
• simplifyPath — Ramer-Douglas-Peucker simplification

Boolean Operations

• union, intersection, difference, xorPaths — polygon clipping
• pathToPolygon, polygonToPath — conversion utilities
• polygonArea, pointInPolygon — polygon analysis

Transforms

• translate, rotate, rotateAround, scale, scaleXY, skewX, skewY
• Matrix type with identity, composeMatrix, applyMatrix
• Matrix constructors: translateM, rotateM, scaleM, scaleXYM, skewXM, skewYM

Gradients

• linearGradient, radialGradient — gradient constructors
• stop, stopWithOpacity, evenStops, oklabStops — gradient stop builders

Style

• fill, fillColor, fillGradient, fillNone, fillRule
• stroke, strokeEx, dashedStroke, defaultStrokeConfig
• opacity, clip, mask, blur, dropShadow
• withId, use, raw, title, desc

Text

• text, textAt, textWithConfig — text element constructors
• defaultTextConfig, fontSize, fontFamily, bold, italic, anchor — config builders

Noise

• perlin2D, simplex2D — deterministic 2D noise
• fbm — fractional Brownian motion
• noisePath, noiseClosedPath — procedural path generation
• wobblePath, jitterPoints — noise-driven distortion
• voronoiCells, voronoiEdges — Voronoi diagram generation

Patterns

• dotGrid, lineGrid, crosshatch, checker — tileable pattern generators
• patternDef, PatternConfig, defaultPatternConfig — SVG pattern element construction

SVG Parsing

• parseSvg, parseElement — parse SVG text back to Element trees
• Supports basic shapes, paths, groups, text, and presentation attributes
• Enables round-trip workflows: render, parse, manipulate, re-export

Composition

• group, empty, document, documentWithViewBox, background
• optimizeElement — collapse redundant transforms and empty groups

SVG Output

• render :: Document -> Text — pure SVG serialization
• renderCompact :: Document -> Text — compact SVG output
• renderElement :: Element -> Text — render a fragment without <svg> wrapper
• writeSvg :: FilePath -> Document -> IO () — file output