Provided by: libsvga1-dev_1.4.3-27ubuntu1_i386 bug


       vga_flip - toggle between text and graphics mode


       #include <vga.h>

       int vga_flip(void);


       switches  between  graphics and text mode without destroying the screen
       contents. This makes it possible for your application to use both  text
       and graphics output.

       However,  This is an old vgalib function. You should really only use it
       for debugging as it runs extremely unstable because  svgalib  now  does
       its  own  virtual  console management. If you want to perform a similar
       action, save the current screen  contents  with  ordinary  memory  copy
       operation  to  the frame buffer or gl_getbox(3), set vga_setmode(TEXT),
       then call vga_setmode(3) to return to graphics  operation  and  restore
       the screen contents with memory or gl_putbox(3).

       One  could  also  use  vga_drawscansegment(3) and vga_getscansegment(3)

       However, avoid any calls to vga_flip() in your applications.

       The function always returns 0, a fact on which you shouldn’t rely.

       It  might  be  useful  if  you  are  debugging  one  of  your   svgalib
       applications  though.   If  your  program reaches a breakpoint while in
       graphics mode, you can switch to text mode with the gdb command

       print vga_flip()

       and later restore the graphics screen contents with the  same  command.
       It is useful to define the following alias in gdb:

       define flip <Return> print vga_flip() <Return> end <Return>


       svgalib(7),        vgagl(7),       libvga.config(5),       vga_init(3),
       vga_setflipchar(3),    vga_drawscanline(3),     vga_drawscansegment(3),
       vga_getscansegment(3), gl_getbox(3), gl_putbox(3)


       the original documentation is unknown.

       Hanemaayer <>.

       original author and will happily accept any additions or corrections to
       this first version of the svgalib manual.