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gl_enablepageflipping(3)      Svgalib User Manual     gl_enablepageflipping(3)


NAME

       gl_enablepageflipping - enables automatic page flipping


SYNOPSIS

       #include <vgagl.h>

       int gl_enablepageflipping(GraphicsContext *gc);


DESCRIPTION

       Enable page flipping or triple buffering in gl_copyscreen(3) if the
       physical context gc can do it.

       Returns 3 if triple buffering will be used, 2 for page flipping, 0 if
       page flipping is not possible (due to video memory/mode limitations).

       When pageflipping is enabled, the gl_screenoffset(3) is ignored in
       gl_copyscreen(3).

       The idea is that you draw your picture in gc and copy it to the screen
       by consecutive gl_copyscreen(3) calls. Each of these will choose a free
       buffer in the screen and adjust the display start accourdingly.

       The current context must by the VGA when gl_copyscreen(3) is called in
       this situation.


SEE ALSO

       svgalib(7), vgagl(7), svgalib.conf(5), threedkit(7), testgl(1),
       plane(1), wrapdemo(1), gl_copybox(3), gl_copyboxfromcontext(3),
       gl_copyboxtocontext(3), gl_copyscreen(3), gl_getbox(3), gl_putbox(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.

Svgalib (>= 1.2.11)               2 Aug 1997          gl_enablepageflipping(3)

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