Fix autogen using wrong macro guards and types

The autogen accidentally took a reference instead of a copy, so all the aliases
were using the same data as the base type, leading to incorrect macro guards.

In addition, any aliased function would use the base funciton's types, leading
to incompatibilities when compiling with older headers. The chosen solution is
to always use the alias type if it exists.

Lastly, NVX was added to a blacklist, no functions from NVX extensions will be
generated, since they are experimental in nature.

script/generate_dispatch.py

@@ -35,6 +35,11 @@ exclusions = [
 	'vkDestroyDevice'
 ]
 
+# Excluded extension authors - don't generate anything for these types of extensions
+excluded_extension_authors = [
+	'NVX'
+]
+
 # Check for/install xmltodict
 import sys
 import subprocess
@@ -48,17 +53,17 @@ xmltodict_missing = {'xmltodict'} - installed
 
 # Install xmltodict
 if xmltodict_missing:
-	val = input("xmltodict is required to run this script. Would you like to install? (y/n): ");
+	val = input("xmltodict is required to run this script. Would you like to install? (y/n): ")
 	if(val.lower() == "y"):
 		try:
 			subprocess.check_call([sys.executable, '-m', 'pip', 'install', 'xmltodict'])
 		except subprocess.CalledProcessError as error:
-			print("Failed to install xmltodict due to error:");
-			print(error);
-			input("Press Enter to continue...");
-			sys.exit();
+			print("Failed to install xmltodict due to error:")
+			print(error)
+			input("Press Enter to continue...")
+			sys.exit()
 	else:
-		sys.exit();
+		sys.exit()
 
 # Fetch fresh vk.xml from Khronos repo
 import urllib.request
@@ -67,10 +72,10 @@ import xmltodict
 try:
 	response = urllib.request.urlopen('https://raw.githubusercontent.com/KhronosGroup/Vulkan-Headers/main/registry/vk.xml')
 except urllib.error.URLError as error:
-	print("Failed to download vk.xml due to error:");
+	print("Failed to download vk.xml due to error:")
 	print(error.reason)
-	input("Press Enter to continue...");
-	sys.exit();
+	input("Press Enter to continue...")
+	sys.exit()
 vk_xml_raw = response.read()
 
 vk_xml = xmltodict.parse(vk_xml_raw,process_namespaces=True)
@@ -79,6 +84,12 @@ command_params = {'return_type': '', 'args': [], 'requirements': [], 'macro_temp
 
 device_commands = {}
 
+aliased_types = {}
+types_node = vk_xml['registry']['types']['type']
+for type_node in  types_node:
+	if '@alias' in type_node:
+		aliased_types[type_node['@alias']] = type_node['@name']
+
 # Gather all device functions/aliases for filtering core/extension function fetching
 commands_node = vk_xml['registry']['commands']['command']
 aliases = {}
@@ -92,16 +103,17 @@ for command_node in commands_node:
 		else:
 			new_command_params['args'] = [command_node['param']]
 		if not command_name in exclusions:
-			if new_command_params['args'][0]['type'] == 'VkDevice' or new_command_params['args'][0]['type'] == 'VkCommandBuffer' or new_command_params['args'][0]['type'] == 'VkQueue':
+			if new_command_params['args'][0]['type'] in ['VkDevice', 'VkCommandBuffer', 'VkQueue']:
 				device_commands[command_name] = new_command_params
+				device_commands[command_name]['is_alias'] = False
 	elif '@alias' in command_node:
-		aliases[command_node['@alias']] = command_node['@name'];
+		aliases[command_node['@alias']] = command_node['@name']
 
 # Push the alias name as a device function if the alias exists in device commands
 for alias in aliases:
 	if alias in device_commands:
-		aliased_command_params = device_commands[alias].copy()
-		device_commands[aliases[alias]] = aliased_command_params;
+		device_commands[aliases[alias]] = copy.deepcopy(device_commands[alias])
+		device_commands[aliases[alias]]['is_alias'] = True
 
 # Add requirements for core PFN's
 features_node = vk_xml['registry']['feature']
@@ -124,7 +136,7 @@ for extension_node in extensions_node:
 	if 'require' in extension_node.keys():
 		require_nodes = extension_node['require']
 		for require_node in require_nodes:
-			requirements = [extension_name];
+			requirements = [extension_name]
 			if type(require_node) is not str:
 				if 'command' in require_node.keys():
 					if '@feature' in require_node.keys():
@@ -135,12 +147,18 @@ for extension_node in extensions_node:
 						require_node['command'] = [require_node['command']]
 					for command_node in require_node['command']:
 						if command_node['@name'] in device_commands:
+							if '@author' in extension_node and extension_node['@author'] in excluded_extension_authors:
+								device_commands.pop(command_node['@name'])
+							else:
 								device_commands[command_node['@name']]['requirements'] += [requirements]
 			elif require_node == 'command':
 				if type(require_nodes['command']) is not list:
 					require_nodes['command'] = [require_nodes['command']]
 				for command_node in require_nodes['command']:
 					if command_node['@name'] in device_commands:
+						if '@author' in extension_node and extension_node['@author'] in excluded_extension_authors:
+							device_commands.pop(command_node['@name'])
+						else:
 							device_commands[command_node['@name']]['requirements'] += [requirements]
 
 # Generate macro templates
@@ -226,9 +244,9 @@ for command in device_commands:
 	args_count = len(params['args'])
 	i = args_count
 	for arg in params['args']:
-		front_mods = '';
-		back_mods = ' ';
-		array = '';
+		front_mods = ''
+		back_mods = ' '
+		array = ''
 		arg_type = arg['type']
 		arg_name = arg['name']
 		if '#text' in arg:
@@ -260,6 +278,8 @@ for command in device_commands:
 				if i > 0:
 			 		args_names += ', '
 		else:
+			if arg_type in aliased_types:
+				arg_type = aliased_types[arg_type]
 			args_full += arg_template.substitute(front_mods = front_mods, arg_type = arg_type, back_mods = back_mods, arg_name = arg_name, array = array)
 			args_names += arg_name
 			if i > 0: