GXSetupImageData
QuickDraw GX sends theGXSetupImageDatamessage to allow you to send initialization data that is specific to the kind of imaging system (raster, PostScript, or vector) that is being used for a job. You need to override theGXSetupImageDatamessage if you want to modify imaging data. Your override of theGXSetupImageDatamessage must match the following formal declaration:
OSErr MySetupImageData (void *imageData);
imageData- A pointer to imaging-system-specific data for initializing the printing device.
- function result
- An error code. The value
noErrindicates that the operation was successful.DESCRIPTION
QuickDraw GX sends theGXSetupImageDatamessage to initialize data specific to the type of printer that is being printed to: raster, PostScript, or vector.The default implementation of this message reads the default imaging information from resources within the specific driver.
SPECIAL CONSIDERATIONS
You never send theGXSetupImageDatamessage yourself.You almost always forward the
GXSetupImageDatamessage to other message handlers. Forward the message to get the default values of the imaging data filled in, and then change the data as you require.RESULT CODES
gxSegmentLoadFailedErr A required code segment could not be found,
or there was not enough memory to load it.gxPrUserAbortErr The user has canceled printing. SEE ALSO
You can find an example of an override of theGXSetupImageDatamessage in
Listing 3-11 on page 3-36 in the chapter "Printer Drivers."The raster imaging system structure, which contains the data used by the raster imaging system, is described on page 4-23.
The PostScript imaging system structure, which contains the data used by the PostScript imaging system, is described on page 4-26.
The vector imaging system structure, which contains the data used by the vector imaging system, is described on page 4-32.
Main | Page One | What's New | Apple Computer, Inc. | Find It | Contact Us | Help