writing new states?

I am working on a project that requires a new type of graphics state. I know how to define functions, classes, modules, etc., but it does not seem to me that states are one of these. So my question is: how do I write new state commands?

Thank you.

I'm not completely sure what you mean by defining a new state. Do you want to keep a stack of some attribute of the drawing context, so that you can recall previous values, like push() and pop() for transforms? If it's something along those lines, take a look at this post.

If you want arrange that every object drawn to the canvas gets modified in a certain way, that may be tricky, but if you give some specifics, I'm sure one of us here can help you figure it out.