Module export 

Encoder selection and per-implementation configuration.

EncodeOptions mirrors DecodeOptions: it is an implementation-keyed enum — each variant names one output format and one backend, and carries that backend’s configuration struct. A format that gains an alternative encoder simply gains another variant; there is no generic, implementation-agnostic option set.

EncodeOptions is #[non_exhaustive] so the planned C/C++ encoder backends (libjpeg-turbo, MozJPEG, jpegli, libaom, SVT-AV1) can be added without a breaking change. Their configuration structs are already defined below — see MozjpegEncodeConfig and friends — so the API surface is stable ahead of the implementations. The libjxl backend (LibjxlEncodeConfig) is wired up behind the jxl-encode-libjxl feature.

Structs

CommonEncodeOptions

Encoder-agnostic options shared by every backend.

JpegEncEncodeConfig

Configuration for the jpeg-encoder (pure-Rust) JPEG encoder.

JpegliEncodeConfig

Configuration for the planned jpegli JPEG encoder.

LibaomEncodeConfig

Configuration for the planned libaom AVIF encoder.

LibjpegTurboEncodeConfig

Configuration for the planned libjpeg-turbo JPEG encoder.

LibjxlEncodeConfig

Configuration for the libjxl JPEG XL encoder (the reference encoder).

LibwebpEncodeConfig

Configuration for the libwebp WebP encoder.

MetadataEmbedOptions

Controls which metadata blocks an encoder embeds into its output container.

MozjpegEncodeConfig

Configuration for the planned MozJPEG JPEG encoder.

RavifEncodeConfig

Configuration for the ravif (rav1e) AVIF encoder.

SvtAv1EncodeConfig

Configuration for the planned SVT-AV1 AVIF encoder.

ZuneJxlEncodeConfig

Configuration for the zune-jpegxl JPEG XL encoder (JxlSimpleEncoder).

ZunePngEncodeConfig

Configuration for the zune-png PNG encoder.

Enums

AvifRateControl

Rate-control strategy for AV1-based AVIF encoders.

BitDepth

Bits per pixel sample of an encoded image.

EncodeOptions

Selects the encoder implementation and carries its configuration.

JpegSubsampling

Chroma subsampling mode for JPEG encoders.

LibjxlColorTransform

Internal color transform for the libjxl encoder (JXL_ENC_FRAME_SETTING_COLOR_TRANSFORM).

LibjxlModular

Modular vs VarDCT mode for the libjxl encoder (JXL_ENC_FRAME_SETTING_MODULAR).

OutputFormat

An output container format produced by an EncodeOptions variant.

WebPMode

WebP encoding mode.