Use a program object’s executable shader attachments in the current OpenGL rendering state.
In order to install the program object in the current rendering state, a
program must have been successfully linked by calling linkProgram() or
glLinkProgram.
program (int) – Handle of program to use. Must have originated from a
createProgram() or glCreateProgram call and was successfully
linked. Passing 0 or None disables shader programs.
Examples
Install a program for use in the current rendering state:
useProgram(myShader)
Disable the current shader program by specifying 0:
useProgram(0)