Topic       : The ATARI Compendium
Author      : Scott Sanders / JAY Software
Version     : 1.25 (20/6/2003)
Subject     : Documentation
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Index Size  : 32614
HCP-Version : 6
Compiled on : Atari
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                                FONTGDOS


FONTGDOS is the successor to GDOS 1.x. As with the original GDOS,
FONTGDOS supports only bitmap fonts. Its differences are improved driver
support, support for bezier curves, improved error handling, and a much
quicker response time.

Bezier Curves

FONTGDOS conforms to the PC-GEM/3 file standard with the inclusion of
bezier curve rendering capability with the v_bez() and v_bez_fill() calls.
v_bez_on() must be used to allow FONTGDOS to allocate the memory
necessary for bezier rendering. Likewise v_bez_off() should be used before
an application exits to free any memory used for bezier calls.

Error Support

When GDOS 1.x encountered an error condition, it simply wrote an error
message at the top of the display overwriting a portion of the menu bar
and display screen. FONTGDOS allows an application to disengage this
behavior and instead return error codes in a global variable. It is then
the applications responsibility to check this variable after calls which
may cause an error condition. See the VDI Function Reference call
vst_error() for more information.


See also    GDOS 1.x, FSM-GDOS, SpeedoGDOS