PDF MP operator

Forum|Forum|9 years ago
October 31, 2016
1 reply
460 views

I have a PDF job. The test case contains 12345 MP in its /Contents stream.

The PDF spec says that MP operator requires a name operand. But Adobe

printers and Acrobat seem to ignore the error. Does anybody know why?

This topic has been closed for replies.

T

Test Screen Name

Legend

Acrobat is not a validator. As an implementation, if there is no reason to use the result of an operator - which has no effect on display or printing - the operator is likely to be skipped. There is also no obligation to report an error even if one is detected.

Better forum for PDF language questions: PDF Language and Specifications

P

PS-InterpAuthor

Known Participant

Thanks so much for the response.Why you say that MP "has no effect on display or printing"? I could not reach the same conclusion from the spec.

T

Test Screen Name

Legend

Well, it doesn't affect the graphics state, and it doesn't mark the page, so I see that as "no effect". A renderer has to be aware of it enough to skip the operator and its operands, but this could be done without even being aware of the existence of the MP operator, since every operator leaves the stack clear.

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