From 32fb841e581c0d6bd04d463ffddb68c05c186fd8 Mon Sep 17 00:00:00 2001
From: Paul MARTZ <pmartz@skew-matrix.com>
Date: Wed, 21 Oct 2009 20:13:37 +0000
Subject: [PATCH] From Paul Martz: Branch of the 2.8.2 release to add
 workaround for issue on OS X NVIDIA driver 1.5.49. glBlitFramebuffer on both
 color and depth locks the OS X desktop. Fix is a CMake-controlled switch,
 when enabled, the glBlitFramebuffer does not blit depth. This produces
 acceptable results because apps doing RTT generally don't need to resolve
 MSFBO to depth.