SYNOPSIS

#include <ggi/ggi.h>
ggi_visual_t ggiOpen(const char *display, ...);
int ggiClose(ggi_visual_t vis);

DESCRIPTION

ggiOpen opens a visual. The visual is specified as a display string, followed by NULL. If only NULL is specified, the default display target is opened, which means first examining GGI_DISPLAY, then invoking display-auto(7). The other arguments are for internal purposes only, such as argptr, used to pass driver-specific, non-textual information to the driver.

ggiClose releases and destroys an open visual. This will close X windows, return consoles to text-mode, etc.

RETURN VALUE

ggiOpen returns the opened visual or NULL for error. The ggi_visual_t is opaque to the programmer and should only be used through GGI functions.

ggiClose returns 0 for OK, otherwise a ggi-error(3) code.

EXAMPLES

Open and closing default visual:

ggi_visual_t vis = ggiOpen(NULL);
if(vis==NULL) {
      ggiPanic("Couldn't open default visual!\n");
}
/* do stuff */
ggiClose(vis);

Open and closing a memory visual:

ggi_visual_t memvis = ggiOpen("display-memory", NULL);
if(memvis==NULL) {
      return -1;
}
/* do stuff */
ggiClose(memvis);