Function JxlDecoderGetBoxSizeContents 

pub unsafe extern "C-unwind" fn JxlDecoderGetBoxSizeContents(
    dec: *mut JxlDecoder,
    size: *mut u64,
) -> JxlDecoderStatus

Returns the size of the contents of a box, after the JxlDecoderStatus::Box event. This does not include any of the headers of the box. For compressed “brob” boxes, this is the size of the compressed content. Even when JxlDecoderSetDecompressBoxes is enabled, the return value of function does not change, and the decompressed size is not known before it has already been decompressed and output.

Parameters

• dec: decoder object
• size: size of the payload of the box in bytes

Returns

• JxlDecoderStatus::Error if no box size is available, JxlDecoderStatus::Success otherwise.