[jitter] normalize shader

On Oct 8, 2007, at 3:17 PM, subzero wrote:

> Ok, these examples are clear, nice way to use deinterlace for  
> downsampling and keep track of the max value. But I do not  
> understand how to access every other pixel in a shader, and get the  
> same functionality as deinterlace with a shader...

The idea is not to send out two matrices, but use @dimscale 0.5 0.5  
in your jit.gl.slab and then access four input pixels. A similar  
technique is used in cc.rgba2uyvy.jxs just for the x-axis. I don't  
have time at the moment to make this example for you, but perhaps  
someone else with shader skills does.

-Joshua