I want to know whether it is possible in OpenGL to disable rendering
when reading and writing something in the framebuffer?
I want to write and read(!) something in the framebuffer but meanwhile
the framebuffer shouldn't be drawn.
There are two functions related to this:
glDrawBuffer - specifies a buffer to render to
glReadBuffer - specifies the buffer where pixels are read from
But I couldn't find the function for disabling rendering the framebuffer
to the monitor! Or isn't it possible to disable it and the current read
buffer is displayed?