gl_getcontext(3) [linux man page]

gl_getcontext(3)						Svgalib User Manual						  gl_getcontext(3)

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 struc-
       ture. 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.

Svgalib (>;= 1.2.11)						    2 Aug 1997							  gl_getcontext(3)

restoretextmode(1)                                              Svgalib User Manual                                             restoretextmode(1)

NAME

       restoretextmode - save or restore the SVGA registers for textmode.

SYNOPSIS

       restoretextmode {-r|-w} filename

DESCRIPTION

       The state of the SVGA is written to or restored from filename using the vga_gettextmoderegs(3) and vga_settextmoderegs(3) functions.

       As of this writing this file is 385 bytes long but this might change with future versions.

       Please  do  not  fiddle with the contents of the file except when you know what you do. It might even result in hardware damage. Because of
       that, you should think twice to make this command available to all users on your system.

       The purpose of this program is usually to recover from a crashed console due to an svgalib, Xfree or other  program  bug.  First  save  the
       state  of  the  SVGA card when on a text console. After the crash restore this state. The savetextmode(1) and textmode(1) script makes this
       procedure very easy.

OPTIONS

       -w filename
              write the SVGA state to the file filename.

       -r filename
              restore the SVGA state from the file filename.

SEE ALSO

       svgalib(7), vgagl(7), libvga.config(5), vga_gettextmoderegs(3), vga_settextmoderegs(3),  dumpreg(1),  convfont(1),  fix132x43(1),  restore-
       font(1), restorepalette(1), runx(1), savetextmode(1), setmclk(1), textmode(1).

AUTHOR

       This  manual page was edited by Michael Weller <eowmob@exp-math.uni-essen.de>. The exact source of the referenced utility 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                                                  restoretextmode(1)