Guy English has posted the source code to a basic implementation of the Cocoa Shaders he talked about here. There’s code for conditional shaders, shader lists, clip shaders, and affine transform shaders. As far as shaders that actually draw there’s a solid color shader and one for drawing an image. The image shader lets you tweak the compositing operation, source rect, and set a drawing scale.

In this episode of The Mac Developer Roundtable Scotty, Daniel Jalkut, Uli Kusterer, Gus Mueller and Guy English discuss their high points of 2007 , Error and Exception Handling and what they are hoping for in 2008

In Episode 19 we discuss WWDC with four top developers Daniel Jalkut, Gus Mueller, Wil Shipley and Guy English.