fixed dangling pointer problem (Chris Burghart)

diff --git a/docs/VERSIONS b/docs/VERSIONS
index 2b4ab62736659423f74f124ab74d00d6352c4722..8e1d85eef769c47bb58d03e0eb453b03fefb05dd 100644 (file)
--- a/docs/VERSIONS
+++ b/docs/VERSIONS
@@ -1,4 +1,4 @@
-$Id: VERSIONS,v 1.70 2001/08/28 23:12:37 brianp Exp $
+$Id: VERSIONS,v 1.71 2001/08/31 04:30:14 brianp Exp $
 
 
 Mesa Version History
@@ -891,3 +891,4 @@ Mesa Version History
        - fixed glDrawRangeElements() bug
        - fixed a glPush/PopAttrib() bug related to texture binding
        - flat-shaded, textured lines were broken
+       - fixed a dangling pointer problem in the XMesa code (Chris Burghart)

diff --git a/src/mesa/drivers/x11/xm_api.c b/src/mesa/drivers/x11/xm_api.c
index a077749d597235d7f3bd3de9b6789627aa3338bb..f80a7a70bde3b73d9908f9f61b8f5996649713c5 100644 (file)
--- a/src/mesa/drivers/x11/xm_api.c
+++ b/src/mesa/drivers/x11/xm_api.c
@@ -1,4 +1,4 @@
-/* $Id: xm_api.c,v 1.26 2001/08/28 22:46:22 brianp Exp $ */
+/* $Id: xm_api.c,v 1.27 2001/08/31 04:30:14 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -2032,6 +2032,10 @@ GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer,
       if (drawBuffer->FXctx) {
          fxMesaMakeCurrent(drawBuffer->FXctx);
 
+         /* Disassociate drawBuffer's current context from drawBuffer */
+         if (drawBuffer->xm_context)
+            drawBuffer->xm_context->xm_buffer = NULL;
+
          /* Disassociate old buffer from this context */
          if (c->xm_buffer)
             c->xm_buffer->xm_context = NULL;
@@ -2054,9 +2058,14 @@ GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer,
          return GL_TRUE;
       }
 
+      /* Disassociate drawBuffer's current context from drawBuffer */
+      if (drawBuffer->xm_context)
+         drawBuffer->xm_context->xm_buffer = NULL;
+ 
       /* Disassociate old buffer with this context */
       if (c->xm_buffer)
          c->xm_buffer->xm_context = NULL;
+
       drawBuffer->xm_context = c; /* Associate the context with this buffer */
 
       c->xm_buffer = drawBuffer;