Call XdbeQueryExtension before of calling any Xdbe function

From: Roberto E. Vargas Caballero <k0ga_AT_shike2.com>
Date: Fri, 14 Sep 2012 21:09:51 +0200

XdbeQueryExtension() tells to the caller if the Xdbe extension is present in
the X server, so it should be called for sanity. But like is said in
XdbeQueryExtension(3):

        No other Xdbe functions may be called before this function. If a
        client violates this rule, the effects of all subsequent Xdbe calls
        that it makes are undefined.

it is mandatory call this function.

---
 st.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/st.c b/st.c
index 2e1ac67..b013bca 100644
--- a/st.c
+++ b/st.c
_AT_@ -1970,7 +1970,7 @@ xinit(void) {
 	XSetWindowAttributes attrs;
 	Cursor cursor;
 	Window parent;
-	int sw, sh;
+	int sw, sh, major, minor;
 
 	if(!(xw.dpy = XOpenDisplay(NULL)))
 		die("Can't open display\n");
_AT_@ -2021,9 +2021,10 @@ xinit(void) {
 			CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
 			| CWColormap,
 			&attrs);
+	if(!XdbeQueryExtension(xw.dpy, &major, &minor))
+		die("Xdbe extension is not present\n");
 	xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
 
-
 	/* input methods */
 	xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
 	xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
-- 
1.7.10.4
--X1bOJ3K7DJ5YkBrT
Content-Type: text/x-diff; charset=utf-8
Content-Disposition: attachment; filename="0002-Call-XSync-in-redraw.patch"

Received on Mon Sep 17 2001 - 00:00:00 CEST