Flipping/inverting a Canvas Image

Question

How would I go by flipping an image horizontally so that it is in theory inverted before a draw it ?
Im presuming it will be done with a Transform matrix, but how would I do it ?

before calling:

session.DrawImage(myCanvasBitmap, myXLocation, myYLocation);

Answer 1

Hi,

Welcome to Microsoft Q&A!

You mean to flip image horizontally, right? If yes, you could use Matrix3x2.CreateScale(ScaleX,ScaleY,centerpoint) method, which is used to zoom image. ScaleX between 0 and -1 flip the scale object and decrease its width. ScaleX less than -1 flip the object and increase its width. A value of -1 flips the scaled object but does not change its horizontal size. As follows:

ds.Transform = Matrix3x2.CreateScale(-1,1, centerpoint);  

Please note the value of centerpoint.

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