Open and close a visual
Name
ggiOpen, ggiClose : Open and close a visual
Synopsis
#include <ggi/ggi.h> int ggiOpen(ggi_visual_t vis, const char *display, ...); int ggiClose(ggi_visual_t vis);
Description
ggiOpen opens a visual. vis is a stem created by ggNewStem(3). 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. 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 0 for OK, otherwise a gg-error(3) code.
ggiClose returns 0 for OK, otherwise a gg-error(3) code.
Examples
Open and closing default visual:
int err;
ggi_visual_t vis;
vis = ggNewStem(libggi, NULL);
if (vis == NULL) {
ggPanic("Couldn't create stem!\n");
}
err = ggiOpen(vis, NULL);
if (err != GGI_OK) {
ggPanic("Couldn't open default visual!\n");
}
/* do stuff */
err = ggiClose(vis);
if (err != GGI_OK) {
ggPanic("Couldn't close default visual!\n");
}
ggDelStem(vis);
ggExit();Open and closing a memory visual:
int err;
ggi_visual_t memvis;
memvis = ggNewStem(libggi, NULL);
if (memvis == NULL) {
ggPanic("Could not create stem!\n");
}
err = ggiOpen(memvis, "display-memory", NULL);
if (err != GGI_OK) {
return -1;
}
/* do stuff */
err = ggiClose(memvis);
if (err != GGI_OK) {
return -1;
}
ggDelStem(memvis);
ggExit();