using Mac OS X CoreGraphics via ctypes

Diez B. Roggisch deets at nospam.web.de
Mon Jun 18 12:07:15 CEST 2007


Daniel wrote:

>> > # the next line causes a segfault - what's the right way to do this?
>> > #GCS_RGB = cglib.kCGColorSpaceGenericRGB()
>>
>> Usually, things in the OSX lib that start with k* are a constant - not a
>> function. As is this.
>>
>> Diez
> 
> That's what I thought too. But when I try passing it directly as if it
> were a constant:
> 
> GCS_RGB = cglib.kCGColorSpaceGenericRGB
> cs = cglib.CGColorSpaceCreateWithName(GCS_RGB)
> 
> I get a segfault too. ctypes said kCGColorSpaceGenericRGB was a
> function pointer, so I thought maybe I needed to call it to get the
> value (not very good reasoning, I know).

I'm not sure what that constant exported is - but how about looking the
constant up in the ref docs and pass it as value? Usually these thingies
are some 4-byte-string, or a normal zero-terminated one. 

Diez



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