🎉 Initial Release #

First public release of Flutter Notemus - a professional music notation rendering package for Flutter with complete SMuFL support.

✨ Added #

Core Features

• Complete SMuFL (Standard Music Font Layout) support with 2932 glyphs from Bravura font
• Professional music notation rendering engine
• Staff position calculation system with precise pitch-to-position conversion
• Collision detection and smart spacing system
• Customizable theme system with colors and styles

Musical Elements

• Notes & Rests: All durations from whole to 1024th notes
• Clefs: Treble, bass, alto, tenor, percussion, and tablature clefs
• Key Signatures: Support for all major and minor keys
• Time Signatures: Simple, compound, and complex meters
• Accidentals: Natural, sharp, flat, double sharp/flat, and microtonal accidentals
• Articulations: Staccato, accent, tenuto, marcato, fermata, and more
• Ornaments: Trills, turns, mordents, and grace notes
• Dynamics: Full range from ppp to fff, crescendos, diminuendos
• Chords: Multi-note chords with proper stem alignment and spacing
• Augmentation Dots: Single, double, and triple dots with correct positioning
• Ledger Lines: Automatic ledger lines for notes outside the staff
• Beams: Note beaming support
• Tuplets: Triplets, quintuplets, and other irregular groupings
• Slurs & Ties: Curved connectors between notes
• Repeat Marks: Segno, coda, and other navigation symbols
• Barlines: Single, double, final, and repeat barlines using official SMuFL glyphs
• Breath Marks: Comma, tick, and caesura marks for wind/vocal music

Specialized Renderers (SRP Architecture)

• NoteRenderer - Note head rendering
• StemRenderer - Note stem rendering with SMuFL anchors
• FlagRenderer - Note flag rendering
• DotRenderer - Augmentation dot positioning and rendering
• LedgerLineRenderer - Ledger line rendering
• AccidentalRenderer - Accidental rendering with collision detection
• ChordRenderer - Multi-note chord rendering with custom stem lengths
• DynamicRenderer - Dynamic markings and hairpins
• RepeatMarkRenderer - Repeat symbols (segno, coda)
• TextRenderer - Musical text rendering

Data & Parsing

• JSON music data parser
• JSON export functionality
• Programmatic API for building music notation

Examples

• Complete working examples for all musical elements
• Demonstration of clefs, key signatures, time signatures
• Rhythm notation examples
• Chord and harmony examples
• Articulation and ornament examples
• Dynamic marking examples
• Augmentation dot examples
• Ledger line examples

🏗️ Architecture #

Design Principles

• Single Responsibility Principle: Each renderer has one well-defined purpose
• Modular Design: Easy to extend and customize
• SMuFL Compliant: Follows SMuFL specification for glyph positioning
• Typography-Aware: Uses optical centers and engraving standards

Key Systems

• Staff Coordinate System: Unified coordinate system for staff elements
• SMuFL Positioning Engine: Precise glyph positioning using SMuFL metadata
• Base Glyph Renderer: Shared rendering logic with bounding box support
• Collision Detector: Smart spacing to avoid overlapping elements
• Layout Engine: Intelligent layout with proper spacing

📚 Documentation #

• Comprehensive README with quick start guide
• API reference documentation
• Architecture documentation
• Complete example application
• Inline code documentation

🎨 Themes & Customization #

• Default theme with professional appearance
• Customizable colors for all elements
• Support for dark mode
• Theme inheritance and composition
• Adjustable staff space sizing
• Configurable barline and staff line margins

📦 Database Integration #

• Complete JSON format for storage
• SQLite integration examples
• Database schema recommendations
• Full CRUD operation examples
• Cloud sync patterns (Firebase, Supabase)

Layout & Rendering

• Horizontal Justification: Measures stretch proportionally to fill available width
• Intelligent Line Breaking: Automatic line breaks every 4 measures
• Optimized Staff Lines: Lines end exactly where music ends with smart barline detection
• Configurable Margins: Type-aware staff line margins (normal vs final barlines)
• Multi-System Support: Correct rendering across multiple staff systems

Advanced Beaming System

• Primary Beams: Colcheias (8th notes) with automatic slope calculation
• Secondary Beams: Semicolcheias, fusas, semifusas (up to 128th notes)
• Broken Beams: Fractional beams for dotted rhythms following "Behind Bars" rules
• Smart Breaking: "Two levels above" rule implementation
• SMuFL Precision: 0.5 SS thickness, 0.25 SS gap, perfect geometry

Measure Validation System

• Automatic Validation: Music theory-based validation
• Real-time Capacity Checking: Prevents overfilled measures
• Detailed Error Messages: Shows exactly what's wrong
• Tuplet-Aware: Correctly handles complex rhythms

🐛 Critical Bug Fixes #

Barline Rendering

• Multi-System Alignment: Fixed barlines appearing outside staff on systems 1+
  • Root cause: Inconsistent coordinate systems between staff lines and barlines
  • Solution: Use StaffCoordinateSystem.getStaffLineY() as single source of truth
• Repeat Barline Positioning: Adjusted X offset (-1.0 SS) for proper alignment
• SMuFL Baseline Correction: Applied barlineYOffset = -2.05 for typographic accuracy

Other Fixes

• Augmentation Dot Positioning: Fixed vertical alignment using real note position
• Stem Lengths: Corrected stem lengths for both individual notes and chords
• Ledger Lines: Fixed alignment with noteheads
• Baseline Correction: Applied proper SMuFL glyph baseline correction

🔧 Technical Improvements #

• Optimized glyph rendering with TextPainter caching
• Efficient collision detection algorithm
• Memory-efficient asset loading
• Clean separation of concerns
• Complete removal of debug logging for production
• Zero TODO comments - all planned features documented in README

📦 Dependencies #

• Flutter SDK: >=1.17.0
• Dart SDK: >=3.8.1
• xml: ^6.5.0 (for future MusicXML support)

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[Unreleased] - v0.2.0 (Planned for January 2026) #

📅 Planned Features #

Multi-Staff Support

• Piano Grand Staff: Two interconnected staves with shared barlines
• SATB Vocal Scores: Four-part vocal notation with proper grouping
• Cross-Staff Beaming: Beams spanning multiple staves

Notation Enhancements

• Tablature: 4-string (bass) and 6-string (guitar) tablature rendering
• Chord Symbols: Jazz/pop chord symbols with proper typography
• Grace Notes: Appoggiatura and acciaccatura with correct spacing
• Multiple Voices: Independent rhythms on same staff

Additional Features

• MusicXML import/export support
• MIDI playback integration
• Percussion notation improvements
• Performance optimizations

🚫 Current Limitations (v0.1.0) #

See README.md for detailed information on features not yet implemented but planned for v0.2.0.

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Notes #

Version Numbering #

• Major (X.0.0): Breaking API changes
• Minor (0.X.0): New features, backward compatible
• Patch (0.0.X): Bug fixes, backward compatible

SMuFL Compliance #

All rendering follows the SMuFL 1.40 specification for professional music engraving.

Engraving Standards #

Follows industry-standard engraving practices from:

• "Behind Bars" by Elaine Gould
• "The Art of Music Engraving" by Ted Ross

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Flutter Notemus - Professional music notation for Flutter 🎵