QuickTime 4 Reference

Specifying the Source

The input image for an export operation can come from a QuickDraw Picture, GWorld or PixMap , or a QuickTime graphics importer instance. To specify such a source, call the respective function:



 
GraphicsExportSetInputPicture

GraphicsExportSetInputGWorld

GraphicsExportSetInputPixMap

GraphicsExportSetInputGraphicsImporter

Alternatively, the input image may be a segment of compressed data described by an image description. To specify such a source, call one of these functions:



 
GraphicsExportSetInputDataReference

GraphicsExportSetInputFile

GraphicsExportSetInputHandle

GraphicsExportSetInputPtr

In this case, the compressed data may comprise only a segment of the whole data reference. You may limit access to a segment by calling the GraphicsExportSetInputOffsetAndLimit .