Initial revision

1 files changed, 196 insertions, 0 deletions

diff --git a/src/mesa/main/extensions.c b/src/mesa/main/extensions.c
new file mode 100644
index 00000000000..55687294d17
--- /dev/null
+++ b/src/mesa/main/extensions.c
@@ -0,0 +1,196 @@
+/* $Id: extensions.c,v 1.1 1999/08/19 00:55:41 jtg Exp $ */
+
+/*
+ * Mesa 3-D graphics library
+ * Version:  3.1
+ * 
+ * Copyright (C) 1999  Brian Paul   All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include <stdlib.h>
+#include "extensions.h"
+#include "simple_list.h"
+#include "types.h"
+
+#define MAX_EXT_NAMELEN 80
+#define MALLOC_STRUCT(T)  (struct T *) malloc( sizeof(struct T) )
+
+struct extension {
+   struct extension *next, *prev;
+   int enabled;
+   char name[MAX_EXT_NAMELEN+1];
+   void (*notify)( GLcontext *, GLboolean ); 
+};
+
+
+
+static struct { int enabled; const char *name; } default_extensions[] = {
+   { ALWAYS_ENABLED, "GL_EXT_blend_color" },
+   { ALWAYS_ENABLED, "GL_EXT_blend_minmax" },
+   { ALWAYS_ENABLED, "GL_EXT_blend_logic_op" },
+   { ALWAYS_ENABLED, "GL_EXT_blend_subtract" },
+   { ALWAYS_ENABLED, "GL_EXT_paletted_texture" },
+   { DEFAULT_ON,     "GL_EXT_point_parameters" },
+   { ALWAYS_ENABLED, "GL_EXT_polygon_offset" },
+   { ALWAYS_ENABLED, "GL_EXT_vertex_array" },
+   { ALWAYS_ENABLED, "GL_EXT_texture_object" },
+   { DEFAULT_ON,     "GL_EXT_texture3D" },
+   { ALWAYS_ENABLED, "GL_MESA_window_pos" },
+   { ALWAYS_ENABLED, "GL_MESA_resize_buffers" },
+   { ALWAYS_ENABLED, "GL_EXT_shared_texture_palette" },
+   { ALWAYS_ENABLED, "GL_EXT_rescale_normal" },
+   { ALWAYS_ENABLED, "GL_EXT_abgr" },
+   { ALWAYS_ENABLED, "GL_SGIS_texture_edge_clamp" },
+   { ALWAYS_ENABLED, "GL_EXT_stencil_wrap" },
+   { ALWAYS_ENABLED, "GL_INGR_blend_func_separate" },
+   { DEFAULT_ON,     "GL_ARB_multitexture" },
+   { ALWAYS_ENABLED, "GL_NV_texgen_reflection" },
+   { DEFAULT_ON,     "GL_PGI_misc_hints" },
+   { DEFAULT_ON,     "GL_EXT_compiled_vertex_array" },
+   { DEFAULT_OFF,    "GL_EXT_vertex_array_set" },
+   { DEFAULT_ON,     "GL_EXT_clip_volume_hint" },
+};
+
+
+int gl_extensions_add( GLcontext *ctx, 
+		       int state, 
+		       const char *name, 
+		       void (*notify)() )
+{
+   (void) notify;
+
+   if (ctx->Extensions.ext_string == 0) 
+   {
+      struct extension *t = MALLOC_STRUCT(extension);
+      t->enabled = state;
+      strncpy(t->name, name, MAX_EXT_NAMELEN);
+      t->name[MAX_EXT_NAMELEN] = 0;
+      t->notify = (void (*)(GLcontext *, GLboolean)) notify;
+      insert_at_tail( ctx->Extensions.ext_list, t );
+      return 0;
+   }
+   return 1;
+}
+
+
+static int set_extension( GLcontext *ctx, const char *name, GLuint 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->enabled && !(i->enabled & ALWAYS_ENABLED))
+   {
+      if (i->notify) i->notify( ctx, state );      
+      i->enabled = state;
+   }
+
+   return 0;
+}   
+
+
+int gl_extensions_enable( GLcontext *ctx, const char *name )
+{
+   if (ctx->Extensions.ext_string == 0) 
+      return set_extension( ctx, name, 1 );
+   return 1;
+}
+
+
+int gl_extensions_disable( GLcontext *ctx, const char *name )
+{
+   if (ctx->Extensions.ext_string == 0) 
+      return set_extension( ctx, name, 0 );
+   return 1;
+}
+      
+
+void gl_extensions_dtr( GLcontext *ctx )
+{
+   struct extension *i, *nexti;
+
+   if (ctx->Extensions.ext_string) {
+      free( ctx->Extensions.ext_string );
+      ctx->Extensions.ext_string = 0;
+   }
+
+   if (ctx->Extensions.ext_list) {
+      foreach_s( i, nexti, ctx->Extensions.ext_list ) {
+	 free( i );
+      }
+   
+      free(ctx->Extensions.ext_list);
+      ctx->Extensions.ext_list = 0;
+   }      
+}
+
+
+void gl_extensions_ctr( GLcontext *ctx )
+{
+   GLuint i;
+
+   ctx->Extensions.ext_string = 0;
+   ctx->Extensions.ext_list = MALLOC_STRUCT(extension);
+   make_empty_list( ctx->Extensions.ext_list );
+
+   for (i = 0 ; i < Elements(default_extensions) ; i++) {
+      gl_extensions_add( ctx, 
+			 default_extensions[i].enabled,
+			 default_extensions[i].name,
+			 0 );
+   }
+}
+
+
+const char *gl_extensions_get_string( GLcontext *ctx )
+{
+   if (ctx->Extensions.ext_string == 0) 
+   {
+      struct extension *i;
+      char *str;
+      GLuint len = 0;
+      foreach (i, ctx->Extensions.ext_list) 
+	 if (i->enabled)
+	    len += strlen(i->name) + 1;
+      
+      if (len == 0) 
+	 return "";
+
+      str = (char *)malloc(len * sizeof(char));
+      ctx->Extensions.ext_string = str;
+
+      foreach (i, ctx->Extensions.ext_list) 
+	 if (i->enabled) {
+	    strcpy(str, i->name);
+	    str += strlen(str);
+	    *str++ = ' ';
+	 }
+
+      *(str-1) = 0;
+   }
+      
+   return ctx->Extensions.ext_string;
+}
+
+