1gl_getcontext(3)              Svgalib User Manual             gl_getcontext(3)
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NAME

6       gl_getcontext, currentcontext - get the current graphics contents.
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SYNOPSIS

10       #include <vgagl.h>
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12       void gl_getcontext(GraphicsContext *gc);
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14       extern GraphicsContext currentcontext; /* this is already in vgagl.h */
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DESCRIPTION

18       Save the current context in the structure variable gc.
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20       You  can also get the current context from the global variable current‐
21       context;
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23       However, simply access single  elements  in  this  structure  with  the
24       macros  given  in  vgagl(7)  but  do not copy currentcontext in another
25       structure. This is because the size of the structure might  change  and
26       your  program  does  not  know it when it will be linked dynamically to
27       future svgalib versions.
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29       Instead use gl_allocatecontext(3) to allocate such a structure, fill it
30       with gl_getcontext and release it with free(3) after usage.
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SEE ALSO

34       svgalib(7),   vgagl(7),   svgalib.conf(5),   threedkit(7),   testgl(1),
35       plane(1), wrapdemo(1), gl_allocatecontext(3), gl_copyboxfromcontext(3),
36       gl_copyboxtocontext(3), gl_freecontext(3), gl_setcontext(3), gl_setcon‐
37       textheight(3), gl_setcontextvga(3), gl_setcontextvgavirtual(3), gl_set‐
38       contextvirtual(3), gl_setcontextwidth(3).
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AUTHOR

42       This  manual  page  was  edited by Michael Weller <eowmob@exp-math.uni-
43       essen.de>. The exact source of the referenced demo as well  as  of  the
44       original documentation is unknown.
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46       It is very likely that both are at least to some extent are due to Harm
47       Hanemaayer <H.Hanemaayer@inter.nl.net>.
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49       Occasionally this might be wrong. I hereby asked to be excused  by  the
50       original author and will happily accept any additions or corrections to
51       this first version of the svgalib manual.
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55Svgalib (>= 1.2.11)               2 Aug 1997                  gl_getcontext(3)