Maximum Size of IDL Buffer Object

QUESTION: The documentation doesn't mention it, but there seems to be a maximum size of the IDLgrBuffer object of 1600 by 1200. Is this correct?

ANSWER: Yes, you are correct. The documentation doesn't mention it and there is a maximum size for the buffer object. The buffer object is actually implemented in software by the Mesa OpenGL software library. In versions of IDL prior to IDL 5.6, the maximum size of this buffer was 1600 by 1200. In IDL 5.6, the buffer size was upgraded to 2048 by 2048.