v0.0.5

ci: publish job checks out main (already has bumped version)

v0.0.4

Unified layout I/O (load, load_library, Library), LaykitError, OASIS CBLOCK
decompression, full streaming element parsing, and property preservation
in GDSII/OASIS conversion.

v0.0.3

chore: bump version to 0.0.3

v0.0.1

Changelog

[0.0.1] - 2026-04-12

Initial release.

Added

• GDSII read/write — all element types (Boundary, Path, Text, StructRef, ArrayRef, Node, Box)
• OASIS read/write — all element types (Rectangle, Polygon, Path, Trapezoid, CTrapezoid, Circle, Text, Placement)
• Bidirectional format conversion (GDSII ↔ OASIS)
• Geometry module — bounding box, polygon area/perimeter/centroid, point-in-polygon, affine transforms, mirror, fillet, fracture
• Boolean operations — union, intersection, difference, XOR, polygon slice, offset, convex hull
• FlexPath — flexible paths with miter/bevel/round joins and flush/half-width/extended/round end caps
• Curve primitives — arc, quadratic/cubic/smooth Bezier, elliptical arc, spline interpolation, regular polygon, ellipse, rounded rectangle, star, spiral
• Topology utilities — cell flatten, dependency order, top-level cell detection, cycle detection, hierarchy validation, library merge
• Streaming parser — process large GDSII files without loading into memory
• Array reference expansion (AREF → individual SREFs)
• Property builders and managers for GDSII and OASIS metadata
• File format detection by magic bytes
• CLI tool — convert, info, validate commands
• 164 tests, zero external dependencies

v0.0.0 - Production-Ready GDSII and OASIS Library

GDS_OAS v0.0.0

Production-ready Rust library for GDSII and OASIS IC layout file formats.

Downloads

Pre-built binaries with examples are available for:

• Linux (x86_64)
• Windows (x86_64)
• macOS (x86_64 and ARM64)

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.

[0.1.0] - 2025-11-13

Added

• ✅ Complete GDSII file format support (read/write)
• ✅ Complete OASIS file format support (read/write)
• ✅ All GDSII element types: Boundary, Path, Text, StructRef, ArrayRef, Node, Box
• ✅ All OASIS element types: Rectangle, Polygon, Path, Trapezoid, CTrapezoid, Circle, Text, Placement
• ✅ GDSII transformation support (STrans: rotation, scaling, mirroring)
• ✅ Format conversion utilities (GDSII ↔ OASIS bidirectional)
• ✅ Variable-length integer encoding/decoding (zigzag for signed)
• ✅ Name table management for OASIS
• ✅ Comprehensive test suite (21 tests including round-trip, edge cases)
• ✅ Zero compiler warnings
• ✅ Targeted test assertions
• ✅ Edge case coverage (negative coords, large values, empty cells)
• ✅ Production-level documentation (comprehensive README)
• ✅ Complete API reference with examples
• ✅ Performance benchmarks and optimization tips
• ✅ Detailed technical specifications
• ✅ Two example programs demonstrating usage
• ✅ Full API documentation

Features

• Zero external dependencies (pure Rust std)
• Production-ready GDSII & OASIS support
• Binary format handling with proper encoding
• Hierarchical layout support
• Property metadata support
• OASIS round-trip tested (write then read)
• Rectangle detection from polygons

Fixed (v0.1.0 final)

• OASIS element reading within cells
• OASIS info byte handling in records
• OASIS coordinate mode record handling
• All OASIS tests passing
• All compiler warnings eliminated
• Type conversion issues in tests
• Proper cleanup in test cases

Known Limitations

• Array reference expansion not yet implemented
• Streaming parser for large files not yet available
• Advanced property handling to be enhanced

[Unreleased]

Planned for v0.2.0

• Streaming parser for large files (>1GB)
• Command-line tool for file conversions
• Array reference (AREF) expansion
• Enhanced property handling
• Performance optimizations (SIMD, parallelization)
• Layout validation utilities
• Additional OASIS element types (trapezoids, circles)
• Batch file conversion utilities

Full Changelog: https://github.com/GiridharSalana/laykit/commits/v0.0.0