Does OpenGL have preshaders?

Question

My question is kinda simple but i cant find it in the web. Does OpenGL / OpenGL ES have preshaders like DirectX?

so that you can write things like

mat4 wvpMat = worldMat * viewMat * projMat;
gl_Position = wvpMat * position;

and it will compute the wvpMat only once in the preshader. Or is this not supported and you should make it on the CPU instead?

see Riemers example for XNA:

Answer 1

OpenGL defines several shader stages:

1. vertex shader: runs first for all points you wish to draw

2. optional tesselation with 2 shaders: a control shader to specify how to tesselate and a evaluation shader to do the actual tesselation

3. optional geometry shader: emit a variable amount of primitive per drawn primitive

4. fragment shader: runs per fragment

The driver is allowed to optimize each of these as needed when linking the program together, which may include generating a preshader. However, it is implementation-defined.