SetDSequenceSrcRect
The SetDSequenceSrcRect function defines the portion of the image to decompress.
pascal OSErr SetDSequenceSrcRect (ImageSequence seqID,
const Rect *srcRect);
seqID
- Contains the unique sequence identifier that was returned by the
DecompressSequenceBegin function (described on page 3-107).
srcRect
- Contains a pointer to a rectangle defining the portion of the image to decompress. This rectangle must lie within the boundary rectangle of the compressed image, which is defined by (0,0) and
((**desc).width,(**desc).height), where desc refers to the image description structure you supply to the DecompressSequenceBegin function. If the srcRect parameter is nil, the rectangle is set to the rectangle structure of the image description structure.
DESCRIPTION
The decompressor acts on that portion of the compressed image that lies within this rectangle. The new source rectangle takes effect with the next frame in the sequence.
RESULT CODES
| noErr | 0 | No error |
| paramErr | -50 | Invalid parameter specified |
SEE ALSO
You set the default source rectangle for a sequence with the srcRect parameter to the DecompressSequenceBegin function.
