This section describes functions and a variable that you can use to get information about the capabilities and origin of the X server corresponding to a particular device. The device argument is generally optional and defaults to the selected device.
This function returns the list of version numbers of the X server device is on. The returned value is a list of three integers: the major and minor version numbers of the X protocol in use, and the vendor-specific release number.
This function returns the vendor supporting the X server device is on.
This function returns the visual class of the display device is on. The value is one of the symbols
static-gray,gray-scale,static-color,pseudo-color,true-color, anddirect-color. (Note that this is different from previous versions of SXEmacs, which returnedStaticGray,GrayScale, etc.)