crop image into triangle shape

[dazz]

hello everyone,


i have an image ,i want to crop that image into small parts of triangle shape.
i know how to crop image into rectangle and square using below method....

CGImageCreateWithImageInRect (tempCgImage,localRect);

the resulted cgimage iam making as uiimage.

but, i need the small image (resulted image) sholud be in triangle shape.

Thanks in advance.....