int pdf_open_image ( int
PDF-document, string imagetype, string source, string data,
long length, int width, int height, int components, int bpc,
string params)
Use image data from a variety of data sources. Supported
types are "jpeg", "ccitt", "raw". Supported sources are
"memory", "fileref", "url". len is only used for type="raw",
params is only used for type="ccitt".