Appendix D. State Variables
This appendix lists the queryable OpenGL state variables, their default values, and the commands for obtaining the values of these variables, and contains the following major sections:
The Query Commands
In addition to the basic commands, such as glGetIntegerv() and glIsEnabled(), to obtain the values of simple state variables, there are specialized commands to return more complex state variables. The prototypes for these specialized commands are listed here. Some of these routines, such as glGetError() and glGetString(), were discussed in more detail in Chapter 1.
To find out when you need to use these commands and their corresponding symbolic constants, use the ...
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