v0.3.0

This release introduces new features, performance improvements, and a significant increase in test coverage.

✨ New Features

• Partial Decode Functionality:
  • Added overloads to the decodeImage method that accept Rect and RectF arguments, enabling the efficient decoding of partial image regions.
  • Ratio-based region decoding is also supported for more flexible image manipulation.
• Caching API:
  • Introduced a caching API (the precache method) in Jp2kDecoder and Jp2kDecoderAsync. This improves the performance of subsequent getSize and decodeImage calls.
• Image Size Retrieval:
  • Implemented the getSize method to retrieve image dimensions (width, height) without decoding the entire image data.

🚀 Improvements

• Increased Test Coverage:
  • Significantly improved test coverage for Jp2kDecoder, Jp2kDecoderAsync, and the native C library to enhance robustness.
  • Added boundary value tests, particularly for the partial decoding feature.
• C Wrapper Enhancements:
  • Improved the coverage, robustness, and error handling of the underlying C wrapper.

What's Changed

• Add Usage Guide to README.md by @google-labs-jules[bot] in #81
• Bump nmcp from 1.4.2 to 1.4.3 in /android by @dependabot[bot] in #83
• Bump actions/upload-artifact from 4 to 6 by @dependabot[bot] in #82
• Bump androidx.compose:compose-bom from 2025.12.01 to 2026.01.00 in /android in the androidx group by @dependabot[bot] in #84
• Fix constant access in Jp2kDecoderAsync.kt by @google-labs-jules[bot] in #85
• Implement getSize to retrieve image dimensions without decoding by @keiji in #89
• Bump nmcp from 1.4.3 to 1.4.4 in /android by @dependabot[bot] in #92
• Bump the androidx group in /android with 2 updates by @dependabot[bot] in #90
• Bump gradle-wrapper from 9.1.0 to 9.3.0 in /android by @dependabot[bot] in #91
• Add coverage measurement and reporting for C and Android by @keiji in #93
• Improve test coverage and error handling by @keiji in #94
• Add cached data support to Jp2kDecoder and Jp2kDecoderAsync by @keiji in #95
• Implement partial decoding for JPEG2000 by @keiji in #96
• Update sample app with ROI decoding and add documentation by @keiji in #97
• Support ratio-based region decoding (0.0-1.0) by @keiji in #98
• Improve test coverage for C wrapper and Android library by @keiji in #99
• Improve test coverage for Jp2kDecoderAsync and C wrapper by @keiji in #100
• Add boundary value tests for partial decoding by @keiji in #101
• Improve Android test coverage > 70% by @keiji in #102
• Update .gitignore by @keiji in #105
• Improve Android Test Coverage > 80% by @keiji in #107
• Increase Android Test Coverage by @keiji in #108
• Fix C coverage reporting by using gcov directly by @keiji in #109
• Improve C wrapper coverage with boundary and error tests by @keiji in #110
• Document and implement Float and RectF partial decoding by @keiji in #111

Full Changelog: v0.2.0...v0.3.0

v0.2.0

New Features

• Added support for 1-channel images.

Breaking Changes

• Moved applicationContext injection from the constructor to the init method.
• Introduced strict state management.

What's Changed

• Add publishing instructions to README.md by @google-labs-jules[bot] in #50
• Update README.md with installation instructions by @google-labs-jules[bot] in #52
• Add commented out jp2k-decoder-android dependency to app build.gradle… by @keiji in #51
• Add License section to README.md by @keiji in #53
• Update README with Maven Central installation instructions by @google-labs-jules[bot] in #54
• Refactor Jp2kDecoder for Thread Safety and Lazy Init by @google-labs-jules[bot] in #55
• Add Mutex to Jp2kDecoder to handle concurrent calls by @google-labs-jules[bot] in #56
• Update Instrumentation Tests for Jp2kDecoder API and add state validation by @google-labs-jules[bot] in #57
• Add API to retrieve WASM/JS memory usage by @google-labs-jules[bot] in #58
• Reduce initial WASM memory footprint to 4MB by @google-labs-jules[bot] in #60
• Implement AutoCloseable in Jp2kDecoderAsync by @google-labs-jules[bot] in #61
• Update design.md with architecture and flow diagrams by @google-labs-jules[bot] in #62
• docs: fix broken mermaid diagram in design.md by @google-labs-jules[bot] in #63
• Update design doc regarding Hex conversion responsibility by @google-labs-jules[bot] in #64
• docs: fix duplicate return json entry in design.md by @google-labs-jules[bot] in #65
• Fix layer count discrepancy in design doc by @google-labs-jules[bot] in #66
• Update README to link to Design Document by @google-labs-jules[bot] in #67
• Cleanup constants and secure WASI logging by @google-labs-jules[bot] in #68
• Expose decoder state and add KDoc by @google-labs-jules[bot] in #71
• Make Jp2kDecoderAsync.init idempotent by @google-labs-jules[bot] in #70
• Refine Jp2kDecoderAsync state behavior and documentation by @google-labs-jules[bot] in #72
• Decouple Jp2kDecoder and make it native Coroutines by @google-labs-jules[bot] in #73
• Use HexString for WASM loading and refactor JS utils by @google-labs-jules[bot] in #74
• Bump version to 0.2.0 by @keiji in #75
• Support Grayscale (1ch) and Multi-channel (>4ch) Inputs by @google-labs-jules[bot] in #76
• Configure NMCP to use USER_MANAGED publishing type by @google-labs-jules[bot] in #77
• Use Base64 for App-WASM data exchange by @google-labs-jules[bot] in #78
• Add execution time logging for JS/WASM decoding by @google-labs-jules[bot] in #79
• Improve error reporting for JavaScript exceptions in Jp2kDecoder by @google-labs-jules[bot] in #80

Full Changelog: v0.1.0...v0.2.0

v0.1.0

Known Issue

• Unable to decode 1-channel images.

What's Changed

• Update README.md with JPEG2000 decoding features by @google-labs-jules[bot] in #1
• Optimize Bitmap creation by generating BMP in JS by @google-labs-jules[bot] in #2
• Move JP2 format detection to wrapper.c by @google-labs-jules[bot] in #4
• Add GitHub Actions CI for Android and WASM by @google-labs-jules[bot] in #3
• Move BMP generation to wrapper.c by @google-labs-jules[bot] in #5
• Change data exchange from Base64 to HexString by @google-labs-jules[bot] in #6
• Sync built WASM to Android assets in CI workflow by @google-labs-jules[bot] in #7
• Update WASM workflow to target lib assets by @google-labs-jules[bot] in #8
• Rename sample to android by @keiji in #9
• Setup Dependabot by @google-labs-jules[bot] in #10
• Bump actions/setup-java from 4 to 5 by @dependabot[bot] in #12
• Bump the androidx group in /android with 8 updates by @dependabot[bot] in #15
• Bump actions/checkout from 4 to 6 by @dependabot[bot] in #13
• Bump actions/upload-artifact from 4 to 6 by @dependabot[bot] in #14
• Bump gradle/actions from 3 to 5 by @dependabot[bot] in #11
• Add logging configuration to Jp2kDecoder by @google-labs-jules[bot] in #18
• Update GitHub Actions workflow triggers for feature branches by @google-labs-jules[bot] in #19
• Bump org.jetbrains.kotlin.plugin.compose from 2.0.21 to 2.3.0 in /android by @dependabot[bot] in #16
• Add Jp2kDecoderAsync class by @google-labs-jules[bot] in #21
• Refactor Jp2kDecoder to use shared JavaScriptSandbox and optimize settings by @google-labs-jules[bot] in #23
• Add release method to Jp2kDecoder and update sample app by @google-labs-jules[bot] in #24
• Add Jp2kError enum matching wrapper.c error codes by @google-labs-jules[bot] in #25
• Add Android Instrumentation tests for Jp2kDecoder by @google-labs-jules[bot] in #26
• Validate input length in Jp2kDecoder by @google-labs-jules[bot] in #27
• Update Android instrumentation tests by @keiji in #29
• Make decoder memory and pixel limits configurable by @keiji in #30
• Update wrapper.c input size validation and error renaming by @google-labs-jules[bot] in #33
• Update README with security motivation by @google-labs-jules[bot] in #32
• Refactor Jp2kDecoder config to data class by @google-labs-jules[bot] in #31
• Update README with OpenJPEG build instructions by @google-labs-jules[bot] in #35
• Enable Android Lint with Reviewdog in CI by @google-labs-jules[bot] in #34
• Add design document by @google-labs-jules[bot] in #36
• Support Alpha channel in wrapper.c by @google-labs-jules[bot] in #37
• Support RGB565 and ARGB8888 decoding formats by @google-labs-jules[bot] in #39
• Refactor wrapper.c and add unit tests by @google-labs-jules[bot] in #40
• Add CI badge to README.md by @google-labs-jules[bot] in #41
• Add KDoc comments to public API in android lib by @keiji in #44
• Configure Dokka for KDoc generation by @google-labs-jules[bot] in #45
• Fix Dokka documentation generation failure by @google-labs-jules[bot] in #46
• Refactor Jp2kDecoder and update build config by @keiji in #47
• Setup NMCP publishing for lib module by @google-labs-jules[bot] in #49
• Configure Maven Central Publishing for Lib Module by @google-labs-jules[bot] in #48

New Contributors

• @google-labs-jules[bot] made their first contribution in #1
• @keiji made their first contribution in #9
• @dependabot[bot] made their first contribution in #12

Full Changelog: https://github.com/keiji/jp2k-decoder-android/commits/v0.1.0