NAME¶
gl_getcontext, currentcontext - get the current graphics contents.
SYNOPSIS¶
#include <vgagl.h>
void gl_getcontext(GraphicsContext *gc);
extern GraphicsContext currentcontext; /* this is already
in vgagl.h */
DESCRIPTION¶
Save the current context in the structure variable
gc.
You can also get the current context from the global variable
currentcontext;
However, simply access single elements in this structure with the macros given
in
vgagl(7) but do not copy
currentcontext in another structure.
This is because the size of the structure might change and your program does
not know it when it will be linked dynamically to future svgalib versions.
Instead use
gl_allocatecontext(3) to allocate such a structure, fill it
with
gl_getcontext and release it with
free(3) after usage.
SEE ALSO¶
svgalib(7),
vgagl(7),
svgalib.conf(5),
threedkit(7),
testgl(1),
plane(1),
wrapdemo(1),
gl_allocatecontext(3),
gl_copyboxfromcontext(3),
gl_copyboxtocontext(3),
gl_freecontext(3),
gl_setcontext(3),
gl_setcontextheight(3),
gl_setcontextvga(3),
gl_setcontextvgavirtual(3),
gl_setcontextvirtual(3),
gl_setcontextwidth(3).
AUTHOR¶
This manual page was edited by Michael Weller
<eowmob@exp-math.uni-essen.de>. The exact source of the referenced demo
as well as of the original documentation is unknown.
It is very likely that both are at least to some extent are due to Harm
Hanemaayer <H.Hanemaayer@inter.nl.net>.
Occasionally this might be wrong. I hereby asked to be excused by the original
author and will happily accept any additions or corrections to this first
version of the svgalib manual.
