C#: Draw one Bitmap onto Another, with Transparency

Question

I have two Bitmaps, named largeBmp and smallBmp. I want to draw smallBmp onto largeBmp, then draw the result onto the screen. SmallBmp\'s white pixels should be transparent. Her

Answer 1

CompositingMode.SourceCopy is the problem here. You want CompositingMode.SourceOver to get alpha blending.