swrast: Add glBlitFramebuffer to commands affected by conditional rendering

Cc: <mesa-stable@lists.freedesktop.org>
Signed-off-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Brian Paul <brianp@vmware.com>

src/mesa/swrast/s_blit.c

@@ -29,6 +29,7 @@
 #include "main/macros.h"
 #include "main/format_unpack.h"
 #include "main/format_pack.h"
+#include "main/condrender.h"
 #include "s_context.h"
 
 
@@ -748,6 +749,13 @@ _swrast_BlitFramebuffer(struct gl_context *ctx,
    };
    GLint i;
 
+   /* Page 679 of OpenGL 4.4 spec says:
+    *    "Added BlitFramebuffer to commands affected by conditional rendering in
+    *     section 10.10 (Bug 9562)."
+    */
+   if (!_mesa_check_conditional_render(ctx))
+      return; /* Do not blit */
+
    if (!_mesa_clip_blit(ctx, &srcX0, &srcY0, &srcX1, &srcY1,
                         &dstX0, &dstY0, &dstX1, &dstY1)) {
       return;