Since only one of the places that used glXFunction::command_payload_length

actually used both values, it was refactored into command_fixed_length and
command_variable_length.  glXFunction::offset_of_first_parameter was also
added.

src/mesa/glapi/glX_XML.py

@@ -240,7 +240,7 @@ class glXEnumFunction:
 class glXEnum(gl_XML.glEnum):
 	def __init__(self, context, name, attrs):
 		gl_XML.glEnum.__init__(self, context, name, attrs)
-		self.glx_functions = []
+
 
 	def startElement(self, name, attrs):
 		if name == "size":
@@ -416,6 +416,7 @@ class glXFunction(gl_XML.glFunction):
 
 		return
 
+
 	def variable_length_parameter(self):
 		for param in self.fn_parameters:
 			if param.is_variable_length_array():
@@ -424,8 +425,14 @@ class glXFunction(gl_XML.glFunction):
 		return None
 
 
-	def command_payload_length(self):
+	def offset_of_first_parameter(self):
-		size = 0
+		"""Get the offset of the first parameter in the command.
+
+		Gets the offset of the first function parameter in the GLX
+		command packet.  This byte offset is measured from the end
+		of the Render / RenderLarge header.  The offset for all non-
+		pixel commends is zero.  The offset for pixel commands depends
+		on the number of dimensions of the pixel data."""
 
 		if self.image:
 			[dim, junk, junk, junk, junk] = self.dimensions()
@@ -435,47 +442,53 @@ class glXFunction(gl_XML.glFunction):
 			# of dimensions.
 
 			if dim <=  2:
-				size = 20
+				return 20
 			elif dim <= 4:
-				size = 36
+				return 36
 			else:
 				raise RuntimeError('Invalid number of dimensions %u for parameter "%s" in function "%s".' % (dim, self.image.name, self.name))
+		else:
+			return 0
 
-			if self.image.img_null_flag:
+
+	def command_fixed_length(self):
+		"""Return the length, in bytes as an integer, of the
+		fixed-size portion of the command."""
+
+		size = self.offset_of_first_parameter()
+
+		for p in gl_XML.glFunction.parameterIterator(self):
+			if not p.is_output:
+				size += p.size()
+				if self.pad_after(p):
 					size += 4
 
-			if self.image.img_pad_dimensions:
+		if self.image and self.image.img_null_flag:
-				size += 4 * (dim & 1)
+			size += 4
 
-				# If the image has offset parameters, like
+		return size
-				# TexSubImage1D or TexSubImage3D, they need to
-				# be padded out as well.
-
-				if self.image.img_xoff:
-					size += 4 * (dim & 1)
 
 
+	def command_variable_length(self):
+		"""Return the length, as a string, of the variable-sized
+		portion of the command."""
 
 		size_string = ""
 		for p in gl_XML.glFunction.parameterIterator(self):
-			if p.is_output: continue
+			if (not p.is_output) and (p.size() == 0):
-			temp = p.size_string()
+				size_string = size_string + " + __GLX_PAD(%s)" % (p.size_string())
-			try:
+
-				s = int(temp)
+		return size_string
-				size += s
-			except Exception,e:
-				size_string = size_string + " + __GLX_PAD(%s)" % (temp)
 
-		return [size, size_string]
 
 	def command_length(self):
-		[size, size_string] = self.command_payload_length()
+		size = self.command_fixed_length()
 
 		if self.glx_rop != 0:
 			size += 4
 
 		size = ((size + 3) & ~3)
-		return "%u%s" % (size, size_string)
+		return "%u%s" % (size, self.command_variable_length())
 
 
 	def opcode_real_value(self):

src/mesa/glapi/glX_proto_send.py

@@ -470,18 +470,13 @@ generic_%u_byte( GLint rop, const void * ptr )
 					indent += "    "
 
 				[dim, width, height, depth, extent] = pixel_func.dimensions()
-
+				adjust = pixel_func.offset_of_first_parameter() + 4
-				if dim < 3:
-					adjust = 20 + 4
-				else:
-					adjust = 36 + 4
-
 
 				print '%s    emit_header(gc->pc, opcode, cmdlen);' % (indent)
 
 				offset = self.pixel_emit_args(pixel_func, "gc->pc", indent, adjust, dim, 0)
 
-				[s, junk] = pixel_func.command_payload_length()
+				s = pixel_func.command_fixed_length()
 
 				pixHeaderPtr = "gc->pc + 4"
 				pcPtr = "gc->pc + %u" % (s + 4)
@@ -559,18 +554,13 @@ generic_%u_byte( GLint rop, const void * ptr )
 			indent += "    "
 
 		[dim, width, height, depth, extent] = f.dimensions()
-
+		adjust = f.offset_of_first_parameter() + 4
-		if dim < 3:
-			adjust = 20 + 4
-		else:
-			adjust = 36 + 4
-
 
 		print '%s    emit_header(gc->pc, %s, cmdlen);' % (indent, f.opcode_real_name())
 
 		offset = self.pixel_emit_args(f, "gc->pc", indent, adjust, dim, 0)
 
-		[s, junk] = f.command_payload_length()
+		s = f.command_fixed_length()
 
 		pixHeaderPtr = "gc->pc + 4"
 		pcPtr = "gc->pc + %u" % (s + 4)
@@ -623,7 +613,7 @@ generic_%u_byte( GLint rop, const void * ptr )
 		if f.variable_length_parameter() == None and len(f.fn_parameters) == 1:
 			p = f.fn_parameters[0]
 			if p.is_pointer:
-				[cmdlen, size_string] = f.command_payload_length()
+				cmdlen = f.command_fixed_length()
 				if cmdlen in self.generic_sizes:
 					self.common_func_print_just_header(f)
 					print '    generic_%u_byte( %s, %s );' % (cmdlen, f.opcode_real_name(), p.name)