[Mesa-stable] [PATCH] glx: Generate GLXBadDrawable when drawable is zero

[Ian Romanick]

From: Ian Romanick <ian.d.romanick at intel.com>

Fixes piglit glx-query-drawable-GLXBadDrawable.

Signed-off-by: Ian Romanick <ian.d.romanick at intel.com>
Cc: "9.2" <mesa-stable at lists.freedesktop.org>
---
 src/glx/glx_pbuffer.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/src/glx/glx_pbuffer.c b/src/glx/glx_pbuffer.c
index f11305a..183fbaa 100644
--- a/src/glx/glx_pbuffer.c
+++ b/src/glx/glx_pbuffer.c
@@ -40,9 +40,10 @@
 #ifdef GLX_USE_APPLEGL
 #include <pthread.h>
 #include "apple_glx_drawable.h"
-#include "glx_error.h"
 #endif
 
+#include "glx_error.h"
+
 #define WARN_ONCE_GLX_1_3(a, b) {		\
 		static int warned=1;		\
 		if(warned) {			\
@@ -279,7 +280,16 @@ GetDrawableAttribute(Display * dpy, GLXDrawable drawable,
    unsigned int num_attributes;
    GLboolean use_glx_1_3;
 
-   if ((dpy == NULL) || (drawable == 0)) {
+   if (dpy == NULL)
+      return 0;
+
+   /* Page 38 (page 52 of the PDF) of glxencode1.3.pdf says:
+    *
+    *     "If drawable is not a valid GLX drawable, a GLXBadDrawable error is
+    *     generated."
+    */
+   if (drawable == 0) {
+      __glXSendError(dpy, GLXBadDrawable, 0, X_GLXGetDrawableAttributes, false);
       return 0;
    }
 
-- 
1.8.1.4