How does one render an image on a window making it fit into a circle or an ellipse?

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Given a rectangular or square based image, how do I render it on a window so that the image fit into a circle or ellipse of my own choice?

What I have tried:

I have googled fora solution but was unable to find any.

Posted 2-May-16 13:59pm

Gbenbam

Updated 2-May-16 20:20pm

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Sergey Alexandrovich Kryukov 2-May-16 20:04pm

Not clear. Do you want to distort the image into an ellipse, or you just want to cut out (make transparent) all parts beyond the ellipse? In both cases, what's the problem?

And please pay attention: you have 306 questions by now (!); and I'm sure that many have been removed due to some abuse reports. And still, you have no clue how to ask questions. Are you ignoring all comments. I wonder, how many time you got the note that you have to show What have you tried so far? How many times people try to explain to you that problems are not solved by googling, but you need to read the documentation and write code?

—SA

Ravi Bhavnani 3-May-16 0:16am

What you want to do is draw the image in a clipped region. This article and Googling for "win32 draw image" should be more than enough to help you meet your goal:

A Guide to WIN32 Clipping Regions
http://www.codeproject.com/Articles/2095/A-Guide-to-WIN32-Clipping-Regions

/ravi

Gbenbam 3-May-16 2:58am

I don't want to distort the image.I want to cut out all parts outside the ellipse.

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KarstenK · Accepted Answer · 2016-05-02T20:20:00

If you want to draw only parts of the image you must draw only these parts. With somemath you can detect whether a coordinate and its pixel belomg to our drawing region.

Another way is to work with regions. Take a dive into the article A Region Creator.

My tip is to stick with regions, because Microsoft has some functionality built into Windows.