diff --git a/src/mesa/glapi/extension_helper.py b/src/mesa/glapi/extension_helper.py
index 375e3ea59e7..64f64a2fd86 100644
--- a/src/mesa/glapi/extension_helper.py
+++ b/src/mesa/glapi/extension_helper.py
@@ -174,6 +174,9 @@ class PrintGlExtensionGlue(gl_XML.gl_print_base):
 
 				parameter_signature = ''
 				for p in f.parameterIterator():
+					if p.is_padding:
+						continue
+
 					# FIXME: This is a *really* ugly hack. :(
 
 					tn = p.type_expr.get_base_type_node()
diff --git a/src/mesa/glapi/glX_proto_recv.py b/src/mesa/glapi/glX_proto_recv.py
index 20f75575cf1..78bebb2dfe4 100644
--- a/src/mesa/glapi/glX_proto_recv.py
+++ b/src/mesa/glapi/glX_proto_recv.py
@@ -225,6 +225,8 @@ class PrintGlxDispatchFunctions(glX_proto_common.glx_print_proto):
 		list = []
 
 		for param in f.parameterIterator():
+			if param.is_padding:
+				continue
 
 			if param.is_counter or param.is_image() or param.is_output or param.name in f.count_parameter_list or len(param.count_parameter_list):
 				location = param.name
diff --git a/src/mesa/glapi/glX_proto_send.py b/src/mesa/glapi/glX_proto_send.py
index b00b8a1ba6d..501706acc77 100644
--- a/src/mesa/glapi/glX_proto_send.py
+++ b/src/mesa/glapi/glX_proto_send.py
@@ -333,7 +333,7 @@ const GLuint __glXDefaultPixelStore[9] = { 0, 0, 0, 0, 0, 0, 0, 0, 1 };
 					if image.img_pad_dimensions:
 						do_it = 1
 						break
-			
+
 
 				if do_it:
 					[h, n] = hash_pixel_function(func)
@@ -422,7 +422,10 @@ generic_%u_byte( GLint rop, const void * ptr )
 		else:
 			src_ptr = "&" + p.name
 
-		if not extra_offset:
+		if p.is_padding:
+			print '(void) memset((void *)(%s + %u), 0, %s);' \
+			    % (pc, p.offset + adjust, p.size_string() )
+		elif not extra_offset:
 			print '(void) memcpy((void *)(%s + %u), (void *)(%s), %s);' \
 			    % (pc, p.offset + adjust, src_ptr, p.size_string() )
 		else:
@@ -472,6 +475,10 @@ generic_%u_byte( GLint rop, const void * ptr )
 				else:
 					dim_str = str(dim)
 
+				if param.is_padding:
+					print '(void) memset((void *)(%s + %u), 0, %s);' \
+					% (pc, (param.offset - 4) + adjust, param.size_string() )
+
 				if param.img_null_flag:
 					if large:
 						print '(void) memcpy((void *)(%s + %u), zero, 4);' % (pc, (param.offset - 4) + adjust)
@@ -739,6 +746,9 @@ generic_%u_byte( GLint rop, const void * ptr )
 
 			p_string = ""
 			for param in f.parameterIterateGlxSend():
+				if param.is_padding:
+					continue
+
 				p_string += ", " + param.name
 
 				if param.is_image():
diff --git a/src/mesa/glapi/gl_API.dtd b/src/mesa/glapi/gl_API.dtd
index f89d3818663..30c646c9244 100644
--- a/src/mesa/glapi/gl_API.dtd
+++ b/src/mesa/glapi/gl_API.dtd
@@ -45,6 +45,7 @@
                    counter             (true | false) "false"
                    count_scale         NMTOKEN "1"
                    output              (true | false) "false"
+                   padding             (true | false) "false"
                    img_width           NMTOKEN #IMPLIED
                    img_height          NMTOKEN #IMPLIED
                    img_depth           NMTOKEN #IMPLIED
diff --git a/src/mesa/glapi/gl_API.xml b/src/mesa/glapi/gl_API.xml
index 6c0367aad79..951fd957994 100644
--- a/src/mesa/glapi/gl_API.xml
+++ b/src/mesa/glapi/gl_API.xml
@@ -3267,7 +3267,8 @@
         <param name="width" type="GLsizei"/>
         <param name="format" type="GLenum"/>
         <param name="type" type="GLenum"/>
-        <param name="pixels" type="const GLvoid *" img_width="width" img_xoff="xoffset" img_format="format" img_type="type" img_target="target" img_null_flag="true" img_pad_dimensions="true"/>
+        <param name="UNUSED" type="GLuint" padding="true"/>
+        <param name="pixels" type="const GLvoid *" img_width="width" img_xoff="xoffset" img_format="format" img_type="type" img_target="target" img_pad_dimensions="true"/>
         <glx rop="4099" large="true"/>
     </function>
 
@@ -3280,7 +3281,8 @@
         <param name="height" type="GLsizei"/>
         <param name="format" type="GLenum"/>
         <param name="type" type="GLenum"/>
-        <param name="pixels" type="const GLvoid *" img_width="width" img_height="height" img_xoff="xoffset" img_yoff="yoffset" img_format="format" img_type="type" img_target="target" img_null_flag="true" img_pad_dimensions="true"/>
+        <param name="UNUSED" type="GLuint" padding="true"/>
+        <param name="pixels" type="const GLvoid *" img_width="width" img_height="height" img_xoff="xoffset" img_yoff="yoffset" img_format="format" img_type="type" img_target="target" img_pad_dimensions="true"/>
         <glx rop="4100" large="true"/>
     </function>
 
@@ -3994,7 +3996,8 @@
         <param name="depth" type="GLsizei"/>
         <param name="format" type="GLenum"/>
         <param name="type" type="GLenum"/>
-        <param name="pixels" type="const GLvoid *" img_width="width" img_height="height" img_depth="depth" img_xoff="xoffset" img_yoff="yoffset" img_zoff="zoffset" img_format="format" img_type="type" img_target="target" img_null_flag="true" img_pad_dimensions="true"/>
+        <param name="UNUSED" type="GLuint" padding="true"/>
+        <param name="pixels" type="const GLvoid *" img_width="width" img_height="height" img_depth="depth" img_xoff="xoffset" img_yoff="yoffset" img_zoff="zoffset" img_format="format" img_type="type" img_target="target" img_pad_dimensions="true"/>
         <glx rop="4115" large="true"/>
     </function>
 
@@ -8061,6 +8064,7 @@
         <param name="depth" type="GLsizei"/>
         <param name="format" type="GLenum"/>
         <param name="type" type="GLenum"/>
+        <param name="UNUSED" type="GLuint" padding="true"/>
         <param name="pixels" type="const GLvoid *"/>
     </function>
 </category>
@@ -8092,6 +8096,7 @@
         <param name="width" type="GLsizei"/>
         <param name="format" type="GLenum"/>
         <param name="type" type="GLenum"/>
+        <param name="UNUSED" type="GLuint" padding="true"/>
         <param name="pixels" type="const GLvoid *"/>
     </function>
 
@@ -8104,6 +8109,7 @@
         <param name="height" type="GLsizei"/>
         <param name="format" type="GLenum"/>
         <param name="type" type="GLenum"/>
+        <param name="UNUSED" type="GLuint" padding="true"/>
         <param name="pixels" type="const GLvoid *"/>
     </function>
 </category>
@@ -8627,7 +8633,8 @@
         <param name="size4d" type="GLsizei"/>
         <param name="format" type="GLenum"/>
         <param name="type" type="GLenum"/>
-        <param name="pixels" type="const GLvoid *" img_width="width" img_height="height" img_depth="depth" img_extent="size4d" img_xoff="xoffset" img_yoff="yoffset" img_zoff="zoffset" img_woff="woffset" img_format="format" img_type="type" img_target="target" img_null_flag="true" img_pad_dimensions="true"/>
+        <param name="UNUSED" type="GLuint" padding="true"/>
+        <param name="pixels" type="const GLvoid *" img_width="width" img_height="height" img_depth="depth" img_extent="size4d" img_xoff="xoffset" img_yoff="yoffset" img_zoff="zoffset" img_woff="woffset" img_format="format" img_type="type" img_target="target" img_pad_dimensions="true"/>
         <glx rop="2058" ignore="true"/>
     </function>
 </category>
diff --git a/src/mesa/glapi/gl_XML.py b/src/mesa/glapi/gl_XML.py
index b7a7388400d..b98919134fb 100644
--- a/src/mesa/glapi/gl_XML.py
+++ b/src/mesa/glapi/gl_XML.py
@@ -309,6 +309,9 @@ def create_parameter_string(parameters, include_names):
 
 	list = []
 	for p in parameters:
+		if p.is_padding:
+			continue
+
 		if include_names:
 			list.append( p.string() )
 		else:
@@ -463,6 +466,7 @@ class gl_parameter:
 		self.img_null_flag      = is_attr_true( element, 'img_null_flag' )
 		self.img_send_null      = is_attr_true( element, 'img_send_null' )
 
+		self.is_padding = is_attr_true( element, 'padding' )
 		return
 
 
diff --git a/src/mesa/glapi/gl_apitemp.py b/src/mesa/glapi/gl_apitemp.py
index 6e35571e143..a37c08d6ce1 100644
--- a/src/mesa/glapi/gl_apitemp.py
+++ b/src/mesa/glapi/gl_apitemp.py
@@ -63,6 +63,9 @@ class PrintGlOffsets(gl_XML.gl_print_base):
 		n = f.static_name(name)
 
 		for p in f.parameterIterator():
+			if p.is_padding:
+				continue
+
 			if p.is_pointer():
 				cast = "(const void *) "
 			else:
diff --git a/src/mesa/glapi/gl_x86_asm.py b/src/mesa/glapi/gl_x86_asm.py
index 651cb03f14d..0dbf3ebe0ab 100644
--- a/src/mesa/glapi/gl_x86_asm.py
+++ b/src/mesa/glapi/gl_x86_asm.py
@@ -44,6 +44,9 @@ class PrintGenericStubs(gl_XML.gl_print_base):
 	def get_stack_size(self, f):
 		size = 0
 		for p in f.parameterIterator():
+			if p.is_padding:
+				continue
+
 			size += p.get_stack_size()
 
 		return size