The owner of the stream - either a Page or Form XObject.
contents
The contents of the stream as obtained from a call to
ArrayAtom.FromContentStream or similar.
ops
The operators to process as obtained from a call to OpAtom.Find
or similar.
Notes
Process a content stream keeping track of state.
In general you will not need to do this but you can assign
custom graphics State
settings prior to calling this function. At completion this
function will assign a new graphics state stack ready for the next
call.