Image shear in WPF

Answer 1

You cannot achieve this kind of effect with linear transformation (mathematically impossible).

You could get this effect with WPF 3D.

Answer 2

You can achieve this effect with a custom pixel shader.

Download a copy of Shazzam (it's free) and check out the paperfold sample (shazzam-tool.com). While it's not exactly the shear effect you showed in your question, it is close.

Have you worked with shaders before? If you want to use a custom shader I have a prototype shear effect that I worked on a couple months ago. I can clean up the HLSL and post it here.

Edit

Shazzam contains a tutorial section and about 80 sample shaders. That's a good place to start. The hardest part about using custom shaders is that you have to learn a new language (HLSL).

There is a list of shader articles at http://blog.shazzam-tool.com/index.php/shader-articles/