From aabf086a03f27aace21f56098989f94b5697c8dd Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Tue, 7 Mar 2000 17:54:58 +0000
Subject: added GL_EXT_texture_lod_bias extension (Michael Vance)

---
 src/mesa/main/extensions.c | 32 ++++++++++++++++++++++++++------
 1 file changed, 26 insertions(+), 6 deletions(-)

(limited to 'src/mesa/main/extensions.c')

diff --git a/src/mesa/main/extensions.c b/src/mesa/main/extensions.c
index b3b7a05382..b6ff6d1293 100644
--- a/src/mesa/main/extensions.c
+++ b/src/mesa/main/extensions.c
@@ -1,4 +1,4 @@
-/* $Id: extensions.c,v 1.18 2000/02/25 03:55:40 keithw Exp $ */
+/* $Id: extensions.c,v 1.19 2000/03/07 17:54:58 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -41,7 +41,7 @@
 
 struct extension {
    struct extension *next, *prev;
-   int enabled;
+   GLint enabled;
    char name[MAX_EXT_NAMELEN+1];
    void (*notify)( GLcontext *, GLboolean ); 
 };
@@ -77,9 +77,23 @@ static struct { int enabled; const char *name; } default_extensions[] = {
    { ALWAYS_ENABLED, "GL_ARB_tranpose_matrix" },
    { DEFAULT_OFF,    "GL_EXT_vertex_array_set" },
    { DEFAULT_OFF,    "GL_EXT_texture_env" },
+   { DEFAULT_ON,     "GL_EXT_texture_lod_bias" }
 };
 
 
+/*
+ * Update the boolean convenience flags in the Extensions struct.
+ */
+static void
+update_extension_flags( GLcontext *ctx )
+{
+   /* Update flags */
+   ctx->Extensions.HaveTextureEnvAdd = gl_extension_is_enabled(ctx, "GL_EXT_texture_env_add");
+   ctx->Extensions.HaveTextureLodBias = gl_extension_is_enabled(ctx, "GL_EXT_texture_lod_bias");
+}
+
+
+
 int gl_extensions_add( GLcontext *ctx, 
 		       int state, 
 		       const char *name, 
@@ -101,21 +115,26 @@ int gl_extensions_add( GLcontext *ctx,
 }
 
 
-static int set_extension( GLcontext *ctx, const char *name, GLuint state )
+/*
+ * Either enable or disable the named extension.
+ */
+static int set_extension( GLcontext *ctx, const char *name, GLint state )
 {
    struct extension *i;
    foreach( i, ctx->Extensions.ext_list ) 
       if (strncmp(i->name, name, MAX_EXT_NAMELEN) == 0) 
 	 break;
 
-   if (i == ctx->Extensions.ext_list) return 1;
+   if (i == ctx->Extensions.ext_list)
+      return 1;
 
-   if (i->enabled && !(i->enabled & ALWAYS_ENABLED))
-   {
+   if (i->enabled && !(i->enabled & ALWAYS_ENABLED)) {
       if (i->notify) i->notify( ctx, state );      
       i->enabled = state;
    }
 
+   update_extension_flags(ctx);
+
    return 0;
 }   
 
@@ -189,6 +208,7 @@ void gl_extensions_ctr( GLcontext *ctx )
 			 default_extensions[i].name,
 			 0 );
    }
+   update_extension_flags(ctx);
 }
 
 
-- 
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