c# - Detecting mouse move in a transparent image

Question

I have an image on my form which is a PNG of a car, and the background is transparent. In C# I am using e.Graphics.DrawImage to draw to the screen, but I want to be able to check when the mouse is moved over the image, but NOT the transparent part of the image.

Update: I had been previously drawing rectangles around the image and checking if mouse was inside the rectangle or not, but that was for the whole image not the non-transparent part of the image.

What would be the best way of going about this,

Thanks in advance

Mark

question from:https://stackoverflow.com/questions/65848625/detecting-mouse-move-in-a-transparent-image

Answer 1

I have solved it now!

I drew a rectangle around the image, and on the mouse move event, I retrieved the current pixel from the cursor location, and then got the Alpha channel from the colour. Then just checked for when the Alpha channel was not equal to 0.