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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[Unreleased]

[0.1.0] - 2026-01-14

Added

Core Package (@autumnsgrove/gossamer)

  • GossamerRenderer class for canvas-based ASCII rendering

    • Cell-based rendering with configurable cell size
    • Animation loop with FPS limiting
    • Support for ImageData and brightness grid inputs
    • Per-character color rendering

  • Pattern generators for procedural effects

    • perlinNoise2D - Classic Perlin noise
    • fbmNoise - Fractal Brownian Motion for organic patterns
    • wavePattern - Sine/cosine wave interference
    • ripplePattern - Concentric circular waves
    • staticNoise / seededNoise2D - Random and reproducible noise
    • generateBrightnessGrid - Main pattern-to-grid function

  • 12 built-in character sets

    • Standard, Dense, Minimal, Grove, Dots, Blocks
    • Lines, Stars, Nature, Weather, Binary, Math
    • Utilities: getCharacterSet, createCharacterSet, invertCharacters

  • Animation utilities

    • createAnimationLoop - Managed loop with start/stop/pause/resume
    • throttle / debounce - Rate limiting functions
    • calculateFPS - Performance monitoring
    • easings - Animation easing functions (linear, easeIn, easeOut, bounce, etc.)

  • Canvas utilities

    • createCanvas, resizeCanvasToContainer, createOffscreenCanvas
    • optimizeContext, setupTextRendering, setBlendMode

  • Image utilities

    • loadImage, loadAndScaleImage, imageToPixelData
    • sampleImageCells, extractBrightness
    • Color functions: rgbToHex, hexToRgb, adjustBrightness, adjustContrast

  • Performance utilities

    • createVisibilityObserver - Pause when off-screen
    • createResizeObserver - Handle container resizing
    • prefersReducedMotion / onReducedMotionChange - Accessibility
    • isLowPowerMode, getRecommendedFPS - Device adaptation
    • isBrowser, isCanvasSupported - Environment detection

Svelte Package (@gossamer/svelte)

  • 5 Svelte 5 components

    • GossamerClouds - Animated ambient background patterns
    • GossamerImage - Image to ASCII transformation with hover reveal
    • GossamerText - ASCII-styled text with animation effects
    • GossamerOverlay - Composite effects with blend modes
    • GossamerBorder - Decorative ASCII borders (6 styles)

  • 11 presets organized by category

    • Grove: grove-mist, grove-fireflies, grove-rain, grove-dew
    • Seasonal: winter-snow, autumn-leaves, spring-petals, summer-heat
    • Ambient: ambient-static, ambient-waves, ambient-clouds

  • Preset utilities

    • getPreset, getPresetNames, getPresetsByCategory

Accessibility

  • All canvas elements marked aria-hidden="true"
  • prefers-reduced-motion support in all animated components
  • Visibility-based animation pausing (IntersectionObserver)
  • Screen-reader text for GossamerText component

Testing

  • 107 unit tests passing
    • Core package: 85 tests (characters, patterns, animation, index)
    • Svelte package: 22 tests (presets)

Documentation

  • Full project specification (docs/SPEC.md)
  • API reference (docs/API.md)
  • Package READMEs

For migration guides and detailed release notes, see GitHub Releases.