Technical Q&A's

GXPD 13 - QuickDraw GX Print Extension (1-May-95)

Q I'm working on a GX print extension that needs to call some C++ routines. Is there a way to accomplish this with either MPW or Metrowerks?

A It is possible to include C++ code in a QuickDraw GX print extension, but it may be difficult, depending on the compiler you choose. There is a related article in issue 4 of develop, which is available on the Developer CD Series. This code does everything necessary to initialize your C++ vtables, since in a stand- alone code resource (your print driver), this is not done for you by the runtime support. Note that vtable layouts are C++ compiler specific.

Support for CFront is being discontinued, so you may want to look into using Symantec's C/C++ for Macintosh or MetroWerks C/C++. The glue code referred to in the develop 4 issue article needs to be modified to work with Symantec's/MetroWerks' compilers. Note that documentation on exact vtable layout in Symantec/MetroWerks may not be readily available.

You could also use the Code Fragment Manager. However, this would work only for the PowerPC environment at this time, since a Code Fragment Manager is not yet available for the 68K environment. CFM fragments can be written in any language, including C++.

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