move some functions, add some comments

diff --git a/src/mesa/main/dd.h b/src/mesa/main/dd.h
index 09a53e557cca9541c8ac10be7e906e5e1ba5daf5..c6760d4ed9053914a5b8dca130791119b7a50c56 100644 (file)
--- a/src/mesa/main/dd.h
+++ b/src/mesa/main/dd.h
@@ -51,6 +51,13 @@ struct gl_pixelstore_attrib;
 
 /**
  * Device driver function table.
+ * Core Mesa uses these function pointers to call into device drivers.
+ * Most of these functions directly correspond to OpenGL state commands.
+ * Core Mesa will call these functions after error checking has been done
+ * so that the drivers don't have to worry about error testing.
+ *
+ * Vertex transformation/clipping/lighting is patched into the T&L module.
+ * Rasterization functions are patched into the swrast module.
  */
 struct dd_function_table {
    /**
@@ -712,6 +719,39 @@ struct dd_function_table {
    /*@}*/
    
 
+   /**
+    * \name Vertex buffer object functions
+    */
+#if FEATURE_ARB_vertex_buffer_object
+   /*@{*/
+   void (*BindBuffer)( GLcontext *ctx, GLenum target,
+                      struct gl_buffer_object *obj );
+
+   struct gl_buffer_object * (*NewBufferObject)( GLcontext *ctx, GLuint buffer,
+                                                GLenum target );
+   
+   void (*DeleteBuffer)( GLcontext *ctx, struct gl_buffer_object *obj );
+
+   void (*BufferData)( GLcontext *ctx, GLenum target, GLsizeiptrARB size,
+                      const GLvoid *data, GLenum usage,
+                      struct gl_buffer_object *obj );
+
+   void (*BufferSubData)( GLcontext *ctx, GLenum target, GLintptrARB offset,
+                         GLsizeiptrARB size, const GLvoid *data,
+                         struct gl_buffer_object *obj );
+
+   void (*GetBufferSubData)( GLcontext *ctx, GLenum target,
+                            GLintptrARB offset, GLsizeiptrARB size,
+                            GLvoid *data, struct gl_buffer_object *obj );
+
+   void * (*MapBuffer)( GLcontext *ctx, GLenum target, GLenum access,
+                       struct gl_buffer_object *obj );
+
+   GLboolean (*UnmapBuffer)( GLcontext *ctx, GLenum target,
+                            struct gl_buffer_object *obj );
+   /*@}*/
+#endif
+
    /**
     * \name Support for multiple T&L engines
     */
@@ -830,38 +870,6 @@ struct dd_function_table {
    void (*UnlockArraysEXT)( GLcontext *ctx );
    /*@}*/
 
-
-   /**
-    * \name Vertex buffer object functions
-    */
-   /*@{*/
-
-   void (*BindBuffer)( GLcontext *ctx, GLenum target,
-                      struct gl_buffer_object *obj );
-
-   struct gl_buffer_object * (*NewBufferObject)( GLcontext *ctx, int buffer,
-                                                GLenum target );
-   
-   void (*DeleteBuffer)( GLcontext *ctx, struct gl_buffer_object *obj );
-
-   void (*BufferData)( GLcontext *ctx, GLenum target, GLsizeiptrARB size,
-                      const GLvoid *data, GLenum usage,
-                      struct gl_buffer_object *obj );
-
-   void (*BufferSubData)( GLcontext *ctx, GLenum target, GLintptrARB offset,
-                         GLsizeiptrARB size, const GLvoid *data,
-                         struct gl_buffer_object *obj );
-
-   void (*GetBufferSubData)( GLcontext *ctx, GLenum target,
-                            GLintptrARB offset, GLsizeiptrARB size,
-                            GLvoid *data, struct gl_buffer_object *obj );
-
-   void * (*MapBuffer)( GLcontext *ctx, GLenum target, GLenum access,
-                       struct gl_buffer_object *obj );
-
-   GLboolean (*UnmapBuffer)( GLcontext *ctx, GLenum target,
-                            struct gl_buffer_object *obj );
-   /*@}*/
 };