This allows one to query monitors (or use BIOS EDID data) and learn their
default modes, etc. To use this, pass an EDID data block edid_parse(), and
get back nicely parsed data, including precalculated modes using GTF, etc.
The result can be printed using edid_print().
Also, if you want to use GTF to generate modes without EDID, you can use the
vesagtf pseudo-device. vesagtf.c can also be compiled as a standalone program
to generate XFree86 modelines.
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