diff --git a/src/mesa/glapi/glX_XML.py b/src/mesa/glapi/glX_XML.py
index 3759e8da02e..1b5c3239e01 100644
--- a/src/mesa/glapi/glX_XML.py
+++ b/src/mesa/glapi/glX_XML.py
@@ -262,7 +262,7 @@ class glx_function(gl_XML.gl_function):
 
 				if param.name != self.img_reset:
 					param.offset = offset
-					if not param.is_variable_length():
+					if not param.is_variable_length() and not param.is_client_only:
 						offset += param.size()
 					
 				if self.pad_after( param ):
@@ -331,7 +331,7 @@ class glx_function(gl_XML.gl_function):
 
 		size = 0
 		for param in self.parameterIterateGlxSend(0):
-			if param.name != self.img_reset:
+			if param.name != self.img_reset and not param.is_client_only:
 				if size == 0:
 					size = param.offset + param.size()
 				else:
diff --git a/src/mesa/glapi/gl_API.dtd b/src/mesa/glapi/gl_API.dtd
index 2f0c88aae5b..f89d3818663 100644
--- a/src/mesa/glapi/gl_API.dtd
+++ b/src/mesa/glapi/gl_API.dtd
@@ -40,6 +40,7 @@
                    mode                (get | set) "set">
 <!ATTLIST param    name                NMTOKEN #REQUIRED
                    type                CDATA   #REQUIRED
+		   client_only	       (true | false) "false"
                    count               NMTOKEN #IMPLIED
                    counter             (true | false) "false"
                    count_scale         NMTOKEN "1"
@@ -79,6 +80,9 @@ will just mean adding a '<glx ignore="true"/>' tag.
 param:
      name - name of the parameter
      type - fully qualified type (e.g., with "const", etc.)
+     client_only - boolean flag set on parameters which are interpreted only
+         by the client and are not present in the protocol encoding (e.g.,
+	 the stride parameters to Map1f, etc.)
      count - for counted arrays (e.g., the 'lists' parameter to glCallLists),
          the parameter or literal that represents the count.  For functions
          like glVertex3fv it will be a litteral, for others it will be one of
diff --git a/src/mesa/glapi/gl_API.xml b/src/mesa/glapi/gl_API.xml
index 4f3a8805e08..905c4a03a67 100644
--- a/src/mesa/glapi/gl_API.xml
+++ b/src/mesa/glapi/gl_API.xml
@@ -2364,9 +2364,9 @@
         <param name="target" type="GLenum"/>
         <param name="u1" type="GLdouble"/>
         <param name="u2" type="GLdouble"/>
-        <param name="stride" type="GLint"/>
+        <param name="stride" type="GLint" client_only="true"/>
         <param name="order" type="GLint"/>
-        <param name="points" type="const GLdouble *"/>
+        <param name="points" type="const GLdouble *" variable_param="order"/>
         <glx rop="143" handcode="true"/>
     </function>
 
@@ -2374,9 +2374,9 @@
         <param name="target" type="GLenum"/>
         <param name="u1" type="GLfloat"/>
         <param name="u2" type="GLfloat"/>
-        <param name="stride" type="GLint"/>
+        <param name="stride" type="GLint" client_only="true"/>
         <param name="order" type="GLint"/>
-        <param name="points" type="const GLfloat *"/>
+        <param name="points" type="const GLfloat *" variable_param="order"/>
         <glx rop="144" handcode="true"/>
     </function>
 
@@ -2384,13 +2384,13 @@
         <param name="target" type="GLenum"/>
         <param name="u1" type="GLdouble"/>
         <param name="u2" type="GLdouble"/>
-        <param name="ustride" type="GLint"/>
+        <param name="ustride" type="GLint" client_only="true"/>
         <param name="uorder" type="GLint"/>
         <param name="v1" type="GLdouble"/>
         <param name="v2" type="GLdouble"/>
-        <param name="vstride" type="GLint"/>
+        <param name="vstride" type="GLint" client_only="true"/>
         <param name="vorder" type="GLint"/>
-        <param name="points" type="const GLdouble *"/>
+        <param name="points" type="const GLdouble *" variable_param="uorder"/>
         <glx rop="145" handcode="true"/>
     </function>
 
@@ -2398,13 +2398,13 @@
         <param name="target" type="GLenum"/>
         <param name="u1" type="GLfloat"/>
         <param name="u2" type="GLfloat"/>
-        <param name="ustride" type="GLint"/>
+        <param name="ustride" type="GLint" client_only="true"/>
         <param name="uorder" type="GLint"/>
         <param name="v1" type="GLfloat"/>
         <param name="v2" type="GLfloat"/>
-        <param name="vstride" type="GLint"/>
+        <param name="vstride" type="GLint" client_only="true"/>
         <param name="vorder" type="GLint"/>
-        <param name="points" type="const GLfloat *"/>
+        <param name="points" type="const GLfloat *" variable_param="uorder"/>
         <glx rop="146" handcode="true"/>
     </function>
 
diff --git a/src/mesa/glapi/gl_XML.py b/src/mesa/glapi/gl_XML.py
index 15c3adc02b7..b7a7388400d 100644
--- a/src/mesa/glapi/gl_XML.py
+++ b/src/mesa/glapi/gl_XML.py
@@ -438,8 +438,9 @@ class gl_parameter:
 		#if ts == "GLdouble":
 		#	print '/* stack size -> %s = %u (after) */' % (self.name, self.type_expr.get_stack_size())
 
-		self.is_counter = is_attr_true( element, 'counter' )
-		self.is_output  = is_attr_true( element, 'output' )
+		self.is_client_only = is_attr_true( element, 'client_only' )
+		self.is_counter     = is_attr_true( element, 'counter' )
+		self.is_output      = is_attr_true( element, 'output' )
 
 
 		# Pixel data has special parameters.