Module codestream_header 

Definitions of structs and enums for the metadata from the JPEG XL codestream headers (signature, metadata, preview dimensions, …), excluding color encoding which is in crate::color::color_encoding.

Structs

JxlAnimationHeader

The codestream animation header, optionally present in the beginning of the codestream, and if it is it applies to all animation frames, unlike JxlFrameHeader which applies to an individual frame.

JxlBasicInfo

Basic image information. This information is available from the file signature and first part of the codestream header.

JxlBlendInfo

The information about blending the color channels or a single extra channel. When decoding, if coalescing is enabled (default), this can be ignored and the blend mode is considered to be JxlBlendMode::Replace. When encoding, these settings apply to the pixel data given to the encoder.

JxlExtraChannelInfo

Information for a single extra channel.

JxlFrameHeader

The header of one displayed frame or non-coalesced layer.

JxlHeaderExtensions

Extensions in the codestream header.

JxlLayerInfo

The information about layers. When decoding, if coalescing is enabled (default), this can be ignored. When encoding, these settings apply to the pixel data given to the encoder, the encoder could choose an internal representation that differs.

JxlPreviewHeader

The codestream preview header

Enums

JxlBlendMode

Frame blend modes. When decoding, if coalescing is enabled (default), this can be ignored.

JxlExtraChannelType

Given type of an extra channel.

JxlOrientation

Image orientation metadata.