I need some help with this example which arises at the boundary between MacRuby
and the C Core Text framework.
Consider the following Core Text function definition:
void CTFrameGetLineOrigins( CTFrameRef frame, CFRange range, CGPoint
origins[] )
The third argument is defined as:
"origins
The buffer to which the origins are copied. The buffer must have at least as
many elements as specified by range's length."
Clearly origins is a buffer and a series of CGPoint structures are copied into
it.
How can this be handled in MacRuby? Specifically:
1. What kind of argument should be passed? Presumably something constructed
using the Pointer.new_with_type() function? Documentation on this function is
very hard to find.
2. How to access the individual CGPoints in the returned buffer? This is not an
Objective-C / MacRuby array object. It is just an address to a buffer. Easy to
do in C, but how to do in MacRuby?
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Paul Howson
Warwick Qld Australia
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