DecompressSequenceBeginS allows you to pass a compressed sample so the codec can do preflighting before the first DecompressSequenceFrame.

pascal OSErr DecompressSequenceBeginS(
    ImageSequence *seqID,
    ImageDescriptionHandle desc,
    Ptr data, long dataSize,
    CGrafPtr port,
    GDHandle gdh,
    const Rect *srcRect,
    MatrixRecordPtr matrix,
    short mode,
    RgnHandle mask,
    CodecFlags flags,
    CodecQ accuracy,
    DecompressorComponent codec)
       = {0x203C,0x30,0x5D,0xAAA3};

seqID Contains a pointer to a field to receive the unique identifier for this sequence returned by the CompressSequenceBegin function.

desc Contains a handle to the image description structure that describes the compressed image.

port Points to the graphics port for the destination image.

gdh Contains a handle to the graphics device record for the destination image.

srcRect Contains a pointer to a rectangle defining the portions of the image to decompress.

matrix Points to a matrix structure that specifies how to transform the image during decompression.

mode Specifies the transfer mode for the operation.

mask Contains a handle to the clipping region in the destination coordinate system.

flags Contains flags providing further control information.

accuracy Specifies the accuracy desired in the decompressed image.

codec Contains compressor identifier.

[May 01 1995]

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