Comment 37 for bug 1583088

Yes, but probably no :)

Performance of the GL pipeline suffers, sometimes dramatically, if you glGet-anything like the current GL_UNPACK_ALIGNMENT.

So getting it for later restoration is highly undesirable. Better to just set it to the right value whenever it's important. That keeps communication between the CPU and GPU in one direction and avoids stalling the pipeline.

https://www.khronos.org/opengl/wiki/Common_Mistakes#glGetFloatv_glGetBooleanv_glGetDoublev_glGetIntegerv