Texture mapping on Disk surface

It is required in our application that a square image should be converted to circular one.
we have decided to take advantage of OpenGL’s Texture mapping concept.

We had started with considering Disk surface. But Texture mapping to a Disk surface cuts off image data at corners.i.e. it’s
appearance on a disk surface is same as that in case of original one with corner cut.

Can anybody can guide me regarding this.

(Textronics Design System)

Calculate the texture coordinates by way of a conformal map. And then rest assured, that you will always be missing some portion of the image. All you can do is minimize what is left out.

[This message has been edited by DFrey (edited 02-12-2003).]