v0.0.5

Full Changelog: v0.0.4...v0.0.5

v0.0.4

Full Changelog: v0.0.3...v0.0.4

v0.0.3

Blanket 0.0.3 adds drawing and text, image expressions, public color helpers, and runtime codec diagnostics. It also expands the Image API and improves native processing across image modes.

New features

• ImageDraw: Draw points, lines, rectangles, rounded rectangles, ellipses, arcs, chords, pieslices, and polygons. Includes optional antialiasing, translucent drawing on RGB images, bitmap drawing, and flood fill.
• Text drawing: Measure and draw single-line and multiline text with anchors, alignment, spacing, and strokes. A built-in bitmap font works without extra dependencies; compatible font objects, including explicitly supplied Pillow fonts, are also supported.
• ImageMath: Evaluate arithmetic, bitwise operations, comparisons, and conversions over single-band images with lambda_eval() and unsafe_eval(). Pixel calculations run in Rust, with parallel execution for large images.
• ImageColor: Use getrgb() and getcolor() to turn CSS color strings into RGB/RGBA tuples or mode-specific pixel values.
• Runtime diagnostics: The new features module provides check(), version(), get_supported(), and blanketinfo() to inspect codec availability, backend versions, and HEIF encoder/decoder support.
• More Image methods: Adds show(), verify(), draft(), getim(), im, remap_palette(), tobitmap(), and effect_spread(). show() supports a custom viewer through BLANKET_IMAGE_VIEWER.

Fixes and processing improvements

• Correct integer and floating-point conversions, including full-precision grayscale samples, 16-bit saturation and byte order, and independent output storage.
• Correct cropped scalar-image resizing and vertical reduction so intermediate results do not include unrelated rows or previous row sums.
• Improve neighborhood filtering across channels, large windows, image edges, and custom filter subclasses.
• Improve flood-fill coverage and drawing on independent images from multiple threads.
• Keep earlier winning PNG candidates during extended lossy-compression searches.
• Reduce metadata parsing allocations by skipping large pixel payloads in JPEG, PNG, and JPEG XL files.
• Expand portable SIMD kernels and parallel integer conversions; optimize packed-pixel operations, image math, resampling, filtering, and quantization.

Build and compatibility notes

• Source builds now require the nightly Rust toolchain pinned in rust-toolchain.toml for portable SIMD. Native operations, codecs, and compression are split into focused workspace crates.
• Update PyO3 to 0.30 and refresh native dependencies. Fix macOS linking by removing an unsupported linker flag.
• Drawing rasterization and the built-in font can differ from Pillow. draft() is a compatibility no-op because decoding is eager; getim() and im expose Blanket's native image object.
• ImageMath.unsafe_eval() and its eval() alias evaluate Python expressions and require trusted input. Prefer lambda_eval() for callable expressions.

Installation

Requires Python 3.12+:

pip install --upgrade pyblanket==0.0.3

Release assets include wheels for Linux x86_64 and ARM64 (glibc 2.39+), macOS 26+ on Apple Silicon, and a source distribution.

Full changelog: v0.0.2...v0.0.3

v0.0.2

Blanket 0.0.2 expands image-mode support beyond grayscale, RGB, RGBA, and indexed images, adding bilevel, alpha, integer, floating-point, and additional color modes.

New features

• Bilevel and alpha modes: Adds 1, LA, and PA images, with mode-aware conversion, pixel access, and supported image operations.
• Integer samples: Adds signed 32-bit I and unsigned 16-bit I;16, I;16L, and I;16B modes, including explicit byte-order handling.
• Floating-point images: Adds F mode with pixel access, conversion, copying, cropping, transposition, resizing, transforms, and TIFF interchange.
• Additional color modes: Adds HSV, CMYK, and YCbCr, plus 8-bit CIE LAB with native LittleCMS conversion between sRGB and D50 LAB.
• Logical channel operations: Adds native bilevel logical operations in ImageChops.

Fixes and processing improvements

• Match Pillow's CMYK and YCbCr conversion behavior.
• Optimize integer and floating-point conversions, parallel HSV conversion, pixel processing, nearest-neighbor mesh transforms, PNG encoding, and TIFF encoding.
• Enable system WebP linking by default for the Python extension and improve native dependency builds.
• Reorganize the Rust core into workspace crates for image storage, operations, codecs, and Python bindings.

Mode compatibility

• Operation support varies by mode. Integer modes and F support selected pixel and geometric operations; many processing operations still require conversion to an 8-bit mode. Indexed P and PA support remains limited.
• CMYK uses raw channels without ICC color management. CMYK output supports JPEG, TIFF, and PDF; save-time compression optimization is unsupported.
• YCbCr output is limited to JPEG through RGB conversion. HSV images require conversion before saving.
• F and LAB output is limited to TIFF. LAB save-time compression optimization is unsupported.
• Blanket remains alpha software with a subset of Pillow's API. Animation and multipage editing are unsupported.

Installation

Requires Python 3.12+:

pip install --upgrade pyblanket==0.0.2

Release assets include wheels for Linux x86_64 and ARM64 (glibc 2.39+), macOS 26+ on Apple Silicon, and a source distribution. Linux ARM64 wheels are new in this release.

Full changelog: v0.0.1...v0.0.2

v0.0.1

The first release of Blanket, a Rust-backed image library with a Pillow-shaped Python API and no external Python runtime dependencies.

Features

• Image processing: Create, open, convert, crop, resize, rotate, transpose, and save images. Includes all six Image.Resampling filters, channel access, palette handling, quantization, and dithering.
• ImageOps: Fit, contain, pad, flip, mirror, adjust colors, and correct EXIF orientation.
• Compositing and analysis: Paste with masks, blend images, alpha-composite overlays, perform channel arithmetic with ImageChops, and calculate per-band statistics with ImageStat.
• Enhancement and filtering: Adjust brightness, contrast, color, and sharpness; apply blur, convolution, rank filters, and 3D color LUTs.
• Formats: Read and write PNG, JPEG, JPEG XL, TIFF, WebP, AVIF, HEIC/HEIF, BMP, GIF, and ICO. Export single-page PDFs with transparency.
• High-bit-depth workflows: Retain 10-, 12-, and 16-bit samples in supported formats and selected operations, with explicit conversion to 8-bit processing.
• Save-time compression: LosslessImageCompressor searches PNG, JPEG, JPEG XL, and HEIF/HEIC encodings without adding loss relative to the requested save. LossyImageCompressor searches for smaller output within a configurable decoded RGB error limit, preserving alpha.
• Interoperability: Work with binary streams, construct images from bytes or array-interface objects, and explicitly convert to Pillow with to_pillow() when Pillow is installed.
• Native execution: Pixel kernels use Rust, SIMD, and parallel processing for supported operations.

Scope and limitations

This alpha release focuses on L, RGB, and RGBA images, with limited indexed P support. It implements a subset of Pillow's API.

Animation and multipage editing are unsupported. Saving writes pixels without preserving source metadata. High-bit-depth support varies by operation and format; most processing requires 8-bit samples. Compression optimization applies to the requested save rather than recovering the original encoded file.

Installation

Requires Python 3.12+:

pip install pyblanket==0.0.1

Release assets include wheels for Linux x86_64 (glibc 2.39+) and macOS 26+ on Apple Silicon, plus a source distribution.

Source: v0.0.1