Passes messages generated during a PostScript conversion process.
- macOS 10.3+
- Mac Catalyst 13.0+
- Core Graphics
A generic pointer to private data shared among your callback functions. This is the same pointer you supplied to
A string containing the message from the PostScript conversion process.
There are several kinds of message that might be sent during a conversion process. The most likely are font substitution messages, and any messages that the PostScript code itself generates. Any PostScript messages written to
stdout are routed through this callback—typically these are debugging or status messages and, although uncommon, can be useful in debugging. In addition, there may be error messages if the document is malformed.