Re: NSImage > trapezium...

FROM : Cathy Shive
DATE : Sun Mar 23 14:54:25 2008

Seriously?

You aren't going to be able to distort your bitmap like this with 
NSImage and there is no ready-made CIFilter to do this distortion 
that I'm aware of.  If I'm wrong about that, then that's the way to 
go.  But,  I think you've gotta do your own pixel pushing for this one.

Explore the CoreImage API .  If there isn't a filter that you can use 
already, you'll want to learn how to create your own.
http://developer.apple.com/documentation/GraphicsImaging/Conceptual/
CoreImaging/ci_intro/chapter_1_section_1.html

I have the feeling, however that  you're going to need to provide the 
math.  You should figure that out first.

Might not be a bad idea to research your topic a little more.  If 
after you do that, you still have questions to ask, try the Quartz 
list.  There will be more graphics people there.

Best of luck!
Cathy

On Mar 23, 2008, at 2:14 PM, Luca wrote:

> Hello. Do you know how can I transform a rectangular image in a 
> trapezium?
>
> Thanks,
> Luca.
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