From 40332059e4f7b289e5524d10c5565232d27bffbe Mon Sep 17 00:00:00 2001
From: Keith Whitwell <keith@tungstengraphics.com>
Date: Mon, 12 Dec 2005 12:57:08 +0000
Subject: Split _MaintainTexEnvProgram into two flags _Maintain and _Use.  This
 restores the ability to run the software driver with program TNL but
 tradtional swrast.

---
 src/mesa/main/context.c | 4 ++++
 src/mesa/main/mtypes.h  | 3 ++-
 src/mesa/main/state.c   | 4 +++-
 3 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/mesa/main/context.c b/src/mesa/main/context.c
index 8fd9af760e..a50632615d 100644
--- a/src/mesa/main/context.c
+++ b/src/mesa/main/context.c
@@ -1237,7 +1237,11 @@ _mesa_initialize_context( GLcontext *ctx,
 #endif
 
    ctx->_MaintainTexEnvProgram = (_mesa_getenv("MESA_TEX_PROG") != NULL);
+   ctx->_UseTexEnvProgram = ctx->_MaintainTexEnvProgram;
+
    ctx->_MaintainTnlProgram = (_mesa_getenv("MESA_TNL_PROG") != NULL);
+   if (ctx->_MaintainTnlProgram)
+      ctx->_MaintainTexEnvProgram = 1; /* this is required... */
 
    ctx->FirstTimeCurrent = GL_TRUE;
 
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 3a7ae03b45..81f10cb1f7 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -2803,8 +2803,9 @@ struct __GLcontextRec
    struct fragment_program *_TexEnvProgram;     /**< Texture state as fragment program */
    struct vertex_program *_TnlProgram;          /**< Fixed func TNL state as vertex program */
 
-   GLboolean _MaintainTexEnvProgram;
    GLboolean _MaintainTnlProgram;
+   GLboolean _MaintainTexEnvProgram;
+   GLboolean _UseTexEnvProgram;
 
    struct gl_query_state Query;  /**< GL_ARB_occlusion_query */
 
diff --git a/src/mesa/main/state.c b/src/mesa/main/state.c
index 57fa4a836c..56cb358c4a 100644
--- a/src/mesa/main/state.c
+++ b/src/mesa/main/state.c
@@ -949,7 +949,9 @@ update_program(GLcontext *ctx)
 	    ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0);
 
       ctx->FragmentProgram._Current = ctx->_TexEnvProgram;
-      ctx->FragmentProgram._Active = GL_TRUE;
+
+      if (ctx->_UseTexEnvProgram)
+	 ctx->FragmentProgram._Active = GL_TRUE;
    }
 }
 
-- 
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