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glx: Don't allow glXMakeContextCurrent() with only one valid drawable
[mesa.git]
/
src
/
glx
/
glxcurrent.c
diff --git
a/src/glx/glxcurrent.c
b/src/glx/glxcurrent.c
index fd04929b89f3a2bbac5d5d06b7e291cfbc516420..2b9c708c3ee6fc97fd11fa503bbdbbce54a21eb6 100644
(file)
--- a/
src/glx/glxcurrent.c
+++ b/
src/glx/glxcurrent.c
@@
-194,6
+194,13
@@
MakeContextCurrent(Display * dpy, GLXDrawable draw,
return True;
}
return True;
}
+ /* can't have only one be 0 */
+ if (!!draw != !!read) {
+ __glXUnlock();
+ __glXSendError(dpy, BadMatch, None, X_GLXMakeContextCurrent, True);
+ return False;
+ }
+
if (oldGC != &dummyContext) {
if (--oldGC->thread_refcount == 0) {
oldGC->vtable->unbind(oldGC, gc);
if (oldGC != &dummyContext) {
if (--oldGC->thread_refcount == 0) {
oldGC->vtable->unbind(oldGC, gc);