On May 6, 2010, at 8:03 PM, Laurent Sansonetti wrote:
> You're right, the Pointer class must be used. Sorry about the lack of
> documentation. Here is a snippet that might work:
>
> # n must be defined
> origins = Pointer.new(CGPoint.type, n) # this builds a pointer to n times
> CGPoint
> CTFrameGetLineOrigins(frame, CFRange.new(0, n), origins)
>
>> 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?
>
> Using Pointer#[] you can simply dereference a given slot in the pointer, as
> in C.
>
> n.times { |i| p origins[i] } # should print nth points
>
> Let me know if this works or not for you.
If it does, I can see this being a useful entry in Matt's book!
- Jordan
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