PeachPDF

GifPassthrough Class

Reads a GIF’s first frame’s LZW-compressed image data verbatim, with no LZW decompress, for callers that want to re-embed the original compressed pixel stream in another container — e.g. a PDF /LZWDecode image stream — rather than decode it into an Image and re-encode it. Only the first frame is read (mirroring PeachImage.Formats.Gif.GifDecoder.Decode(System.IO.Stream,PeachImage.DecoderOptions)’s “decode just the first frame” semantics); see IsAnimated.

public static class GifPassthrough

Inheritance System.Object → GifPassthrough

Methods
TryRead(Stream, GifPassthroughInfo)	Attempts to read info from stream. Returns false (never throws) if the stream is not a GIF, or is structurally invalid, or has no image frames — matching TryLoad(Stream, Image, DecoderOptions)’s contract. Succeeds for interlaced and animated GIFs alike; callers should check Interlaced and MinCodeSize themselves to decide whether the raw data is usable for their target format (see those members’ doc comments for the specific compatibility conditions).

Methods

TryRead(Stream, GifPassthroughInfo)

Attempts to read info from stream. Returns false (never throws) if the stream is not a GIF, or is structurally invalid, or has no image frames — matching TryLoad(Stream, Image, DecoderOptions)’s contract. Succeeds for interlaced and animated GIFs alike; callers should check Interlaced and MinCodeSize themselves to decide whether the raw data is usable for their target format (see those members’ doc comments for the specific compatibility conditions).