TV bezel shaped overlay?

I really like the look of the crt-geom-curved.cg shader found in the shader folder of retroarch, the only problem with it is it distorts the other shaders you added.

Does anyone have an overlay that can be used that gives the bezel shape of an Arcade or CRT TV, so slightly curved edges and rounded corners.

Similar shape to the bezel that is used in these arcade overlay by big10p…

http://ouyaforum.com/showthread.php?955 … IY-artwork

im after just the shape though not actual bezel texture and would want it to fit the height of the display (2560x1440). Could anyone guide me through how to make a shader for retroarch please??