Mesa (shader-work): mesa: add MESA_ROBUST_ACCESS env var to enable ARB_robustness

[Luca Barbieri]

Module: Mesa
Branch: shader-work
Commit: 6e677f16c4496e050f82ed4a43f53db87a72c3e4
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=6e677f16c4496e050f82ed4a43f53db87a72c3e4

Author: Luca Barbieri <luca at luca-barbieri.com>
Date:   Wed Sep  8 06:24:10 2010 +0200

mesa: add MESA_ROBUST_ACCESS env var to enable ARB_robustness

We use the robust access bit to choose whether to apply some loop
optimizations in the GLSL compiler, so it's a good idea to be able
to test this, and it's useful in general to be able to force robustness
from the command line.

In the future, GLX_ARB_create_context_robustness will also allow to turn
this on programmatically in the standard way.

---

 src/mesa/main/context.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/src/mesa/main/context.c b/src/mesa/main/context.c
index 979bc40..f5fe94d 100644
--- a/src/mesa/main/context.c
+++ b/src/mesa/main/context.c
@@ -873,6 +873,11 @@ _mesa_initialize_context_for_api(GLcontext *ctx,
    ctx->WinSysDrawBuffer = NULL;
    ctx->WinSysReadBuffer = NULL;
 
+   /* eventually, GLX_ARB_create_context_robustness will be usable to enable this too */
+   if (_mesa_getenv("MESA_ROBUST_ACCESS")) {
+      ctx->Const.ContextFlags |= GL_CONTEXT_FLAG_ROBUST_ACCESS_BIT_ARB;
+   }
+
    /* misc one-time initializations */
    one_time_init(ctx);