add opening of display

1 files changed, 29 insertions, 0 deletions

diff --git a/xnap.c b/xnap.c
index 29b0e2e..7a4f294 100644
--- a/xnap.c
+++ b/xnap.c
@@ -1,7 +1,36 @@
 #include <stdlib.h>
+#include <stdio.h>
 
 #include <X11/Xlib.h>
 
+void die(const char* s);
+void quit(void);
+void xsetup(void);
+
+Display* dpy = NULL;
+Window root = None;
+int scr = -1;
+
+void die(const char* s)
+{
+	fprintf(stderr, "xnap: %s", s);
+	exit(1);
+}
+
+void quit(void)
+{
+	XCloseDisplay(dpy);
+}
+
+void xsetup(void)
+{
+	if (!(dpy = XOpenDisplay(NULL)))
+		die ("failed to open display");
+
+	int scr = DefaultScreen(dpy);
+	root = RootWindow(dpy, scr);
+}
+
 int main(void)
 {
 	return EXIT_SUCCESS;