flutter_bicubic_resize

Changed

• pub.dev "Documentation" link now points to the hosted docs at codigee.com/open-source/flutter-bicubic-resize.

Changed

• Documentation: hosted docs at codigee.com/open-source/flutter-bicubic-resize (overview, API reference, advanced usage).
• README now links the hosted documentation and points the API reference at the hosted page, keeping doc/api.md as the markdown source.

Replaces auto-tag.yml with release.yml that pushes a v-tag on every main
push, auto-bumping the patch version when the current one is already
tagged so publish.yml always fires. Ignores android/.gradle/.

Added

• Aspect-ratio-preserving resize. New BicubicResizer.resizeToFit scales an image so it fits entirely within a maxWidth x maxHeight box without distortion or cropping ("contain" scaling), computing the target dimensions from the image's real size. Images smaller than the box are left untouched unless allowUpscale: true is passed. EXIF orientation is respected by default so the result never exceeds the box after rotation.
• BicubicResizer.computeFitDimensions, a pure, decode-free helper that returns the fitted BicubicDimensions for a source size and bounding box — usable on any platform and independently of the native library.
• BicubicDimensions, an immutable width/height pair with value equality.

Added

• macOS support. The plugin now builds and links its native C code on macOS, fixing Failed to lookup symbol 'bicubic_resize_rgb' (#3). Adds a macos/ podspec that reuses the shared cross-platform C sources and registers macos as an FFI platform. The Dart loader already resolved symbols via DynamicLibrary.executable() on macOS.

Changed

• The Objective-C registrant now imports FlutterMacOS or Flutter depending on the platform, so a single source file serves iOS and macOS.
• Package.swift now also declares the .macOS(10.15) platform.

Added

• Swift Package Manager support for iOS. The plugin now ships a Package.swift and an SPM-compatible source layout under ios/flutter_bicubic_resize/, resolving the "does not support Swift Package Manager" warning in recent Flutter versions (#4). CocoaPods remains supported via the updated podspec pointing at the same sources.

Changed

• Restructured the iOS native sources into ios/flutter_bicubic_resize/Sources/flutter_bicubic_resize/ with the public C header exposed through an umbrella module map. The former Swift symbol-retention registrant was rewritten in Objective-C so the C sources and registrant share a single SPM target.
• Raised the Android compileSdk to 36.
• Raised the minimum SDK constraints to Dart >=3.5.0 and Flutter >=3.24.0 (required for Swift Package Manager).

feat: add ImageFormatX mimeType/fileExtension getters; bump to 1.5.4

Added

• ImageFormatX extension exposing mimeType and fileExtension getters on ImageFormat.

• Replace deprecated 'library flutter_bicubic_resize;' directive with modern unnamed 'library;'.

• Apply 'dart fix --apply' to example/lib/main.dart (2 unnecessary_brace_in_string_interps). No production code changes.

• README install version bump to ^1.5.3.

Changed

• Replaced the deprecated library flutter_bicubic_resize; directive with the modern unnamed library; declaration in the barrel file.
• Removed unnecessary braces in two string interpolations in the example app (unnecessary_brace_in_string_interps lint cleanup via dart fix --apply). No production code changes.

docs: bump to 1.5.2 with corrected README versions

Changed

• Updated installation docs to ^1.5.2

chore: bump version to 1.5.1

Changed

• Dart SDK constraint: >=3.2.0 <4.0.0
• Flutter constraint: >=3.16.0
• Android compileSdk: 33 → 35
• Android Gradle Plugin: 7.4.2 → 8.7.3
• iOS deployment target: 11.0 → 13.0
• Modernized Gradle DSL (compileSdkVersion → compileSdk)

feat: v1.5.0 — getImageInfo, format conversion, file I/O, parameter v…

Added

• getImageInfo() — read image dimensions, format, channels, and EXIF orientation without decoding pixels
  • BicubicImageInfo class with width, height, channels, format, exifOrientation
  • Computed orientedWidth/orientedHeight for EXIF-corrected dimensions
  • Async variant: getImageInfoAsync()
• resizeFile() / resizeFileToFile() — File I/O convenience methods
  • Read from file path, resize, and return bytes or save to output path
  • Async variants: resizeFileAsync(), resizeFileToFileAsync()
• Format conversion — JPEG↔PNG conversion without resizing
  • jpegToPng() / pngToJpeg() — direct format conversion
  • convertFormat() — auto-detect input and convert to target format
  • Async variants: jpegToPngAsync(), pngToJpegAsync(), convertFormatAsync()
• formatUnknown error code (-6) in BicubicNativeError for unknown/unsupported image formats

Changed

• Parameter validation in C layer — out-of-range filter, edge mode, crop anchor, and aspect mode values are now clamped to safe defaults instead of causing undefined behavior
• Updated flutter_lints from ^3.0.0 to ^4.0.0

Added

• Async wrappers for all public resize methods using Isolate.run() to avoid blocking the UI thread
  • resizeJpegAsync(), resizePngAsync(), resizeRgbAsync(), resizeRgbaAsync()
  • resizeAsync() (auto-detect format), resizeForModelAsync() (ML preprocessing)
• Specific native error codes replacing generic -1 for better debugging
  • BicubicNativeError enum: nullInput (-1), invalidDims (-2), decodeFailed (-3), allocFailed (-4), encodeFailed (-5)
  • BicubicResizeException class with nativeCode, error, and human-readable message
• Custom normalization validation - resizeForModel() now throws ArgumentError if any std value is zero

Changed

• Native C functions now return specific BICUBIC_ERROR_* codes instead of -1 for all errors
• Dart error handling uses BicubicResizeException (implements Exception for backward compatibility)

Fixed

• Android 15 compatibility - Added 16KB page alignment for native library
  • Fixed libflutter_bicubic_resize.so alignment from 4KB to 16KB
  • Required for Android 15 (API 35+) which enforces 16KB page size
  • Added -Wl,-z,max-page-size=16384 linker flag in CMakeLists.txt

Added

• ML preprocessing with normalization - new resizeForModel() method returning Float32List
  • NormalizationType enum: none (default), simple [0,1], centered [-1,1], imageNet, custom
  • ChannelOrder enum: rgb (default), bgr
  • TensorLayout enum: hwc (default, TensorFlow), chw (PyTorch)
  • Custom mean/std normalization parameters
  • Native C pipeline for raw RGB output (no re-encoding overhead)

Optimized

• Pre-computed scale/offset factors for normalization (multiply+add instead of divide+subtract+divide)
• Branch conditions moved outside hot loops for better performance

Changed

• Added machine-learning topic to pubspec.yaml
• Updated API documentation with ML preprocessing section
• Updated README with normalization examples

Added

• Format detection and validation - library now handles unsupported formats
  • ImageFormat enum (jpeg, png) for supported formats
  • UnsupportedImageFormatException - thrown for unsupported formats (HEIC, WebP, GIF, etc.)
  • BicubicResizer.detectFormat(bytes) - detect image format from bytes
  • BicubicResizer.resize(bytes: ...) - generic resize with auto-detection, throws exception for unsupported formats

Added

• Crop anchor positions (CropAnchor) - crop from any position, not just center
  • center (default), topLeft, topCenter, topRight, centerLeft, centerRight, bottomLeft, bottomCenter, bottomRight
• Crop aspect ratio modes (CropAspectRatio) - control crop shape
  • square (default) - 1:1 aspect ratio
  • original - keep original image proportions
  • custom - use custom aspect ratio with aspectRatioWidth/aspectRatioHeight
• Edge handling modes (EdgeMode) - control how pixels outside bounds are handled
  • clamp (default) - repeat edge pixels
  • wrap - tile/repeat image
  • reflect - mirror reflection at edges
  • zero - black/transparent pixels outside
• JPEG EXIF control (applyExifOrientation) - option to disable EXIF orientation correction
• PNG compression control (compressionLevel) - adjust compression 0-9 (default: 6)

Changed

• All new parameters are optional with backward-compatible defaults
• Updated API documentation with comprehensive examples
• Expanded README with new features and usage examples

Fixed

• iOS release build crash - Fixed FFI symbol stripping issue that caused "symbol not found" errors in release/archive builds
• Added proper Xcode build settings to prevent symbol stripping (STRIP_STYLE=non-global)
• Added symbol retention mechanism in Swift plugin to ensure C functions are linked

Added

• EXIF orientation support for JPEG images - photos from mobile cameras now display correctly
• Automatic rotation/flip based on EXIF metadata (supports all 8 orientation values)

Changed

• Breaking: Crop now produces 1:1 aspect ratio (square) instead of proportional crop
  • crop: 1.0 on 1920x1080 image now crops to 1080x1080 (not 1920x1080)
  • This prevents stretching when resizing to square output (e.g., 224x224)
• Updated README with new features documentation

Added

• Optional center crop parameter (crop) for all resize methods
• Crop value range: 0.0-1.0 (1.0 = no crop, 0.5 = center 50%)
• Crop is applied before resize for efficient single-pass processing
• Example app now includes crop slider for testing

Changed

• Updated API documentation with crop parameter
• Updated README with crop usage examples

Fixed

• Fixed GitHub repository links in pubspec.yaml

Added

• Added API documentation (doc/api.md)
• Added topics for better discoverability on pub.dev
• Added funding link
• Added library documentation comments

Added

• Initial release
• Bicubic resize using native C code (stb_image_resize2)
• RGB and RGBA support
• JPEG and PNG encoding/decoding
• Isolate support for non-blocking operations
• iOS and Android support