Poster of Linux kernelThe best gift for a Linux geek
gl_getcontext

gl_getcontext

Section: Svgalib User Manual (3) Updated: 2 Aug 1997
Local index Up
 

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.


 

Index

NAME
SYNOPSIS
DESCRIPTION
SEE ALSO
AUTHOR

This document was created by man2html, using the manual pages.
Time: 21:46:58 GMT, April 16, 2011