jpegxl-rs

A safe JPEGXL wrapper over jpeg-xl library. Check out the original library and the bindings.

Building

The library build jpeg-xl and link to libc++ by default. Optionally, you can set --features=system-jpegxl to dynamically link to it. If you don't have it in default include and library paths, set them with DEP_JXL_INCLUDE and DEP_JXL_LIB respectively.

If you don't want to depend on C++ standard library, use --features without-threads to disable default threadpool.

Usage

Decoding

```rust let mut decoder = decoder_builder().build()?;

// Use multithread use jpegxlrs::ThreadsRunner; let runner = ThreadsRunner::default(); let mut decoder = decoderbuilder() .parallel_runner(&runner) .build()?;

// Customize pixel format let mut decoder = decoderbuilder() .numchannels(3) .endian(Endianness::Big) .align(8) .build()?;

// Set custom memory manager use jpegxlrs::memory::MallocManager; let manager = MallocManager::default(); let mut decoder = decoderbuilder() .memory_manager(&manager) .build()?; ```

Encoding

rust use image::io::Reader as ImageReader; let sample = ImageReader::open("test/sample.png")?.decode()?.to_rgba16(); let mut encoder = encoder_builder().build()?; let buffer: EncoderResult<f32> = encoder.encode(&sample, sample.width(), sample.height())?;

Set encoder options

rust let mut encoder = encoder_builder() .lossless(true) .speed(EncoderSpeed::Falcon) .build()?; // You can change the settings after initialization encoder.set_lossless(false); encoder.set_quality(3.0);

`image` crate integration

The integration is enabled by default. If you don't need it, use without-image feature.

```rust use jpegxl_rs::image::*; use image::DynamicImage;

let sample = std::fs::read("test/sample.jxl")?; let decoder: JxlImageDecoder = JxlImageDecoder::new(&sample)?; let img = DynamicImage::from_decoder(decoder)?; ```