Function parseChunk

parseChunk(
    ctx: IDecodeContext,
    header: IPngHeaderDetails,
    chunk: IPngChunk,
): IPngMetadataPhysicalScaleOfImageSubject
sCAL Physical scale of image subject

Spec: http://www.libpng.org/pub/png/spec/register/pngext-1.4.0-pdg.html#C.sCAL
Parameters
- ctx: IDecodeContext
- header: IPngHeaderDetails
- chunk: IPngChunk
Returns IPngMetadataPhysicalScaleOfImageSubject
- Defined in src/png-codec/decode/chunks/chunk_sCAL.ts:31