Interface JxlImageData

A decoded JPEG XL image: RGBA8 pixels plus dimensions and alpha metadata. Returned by JxlDecoder.decode.

interface JxlImageData {
    hasAlpha: boolean;
    height: number;
    premultipliedAlpha: boolean;
    rgba: Uint8Array;
    width: number;
}

Properties

hasAlpha: boolean

Whether the source stream carries an alpha channel. The rgba buffer is always 4 channels (RGBA8) regardless of this flag.

height: number

Image height in pixels.

premultipliedAlpha: boolean

Whether the rgba colour channels are already multiplied by alpha (associated / premultiplied alpha) rather than straight alpha.

rgba: Uint8Array

Decoded pixels as 8-bit RGBA, row-major from the top-left, length width * height * 4 (4 bytes per pixel).

width: number

Image width in pixels.