mirror of
https://github.com/charles-lunarg/vk-bootstrap.git
synced 2024-11-25 16:24:35 +00:00
a330227666
vulkan.h includes platform specific headers that cause non trivial build overhead. Because vk-bootstrap doesn't make use of any platform specific API's, it can move over to vulkan_core.h. This *MAY* break users of the library who were depending on vulkan/vulkan.h including other headers, like windows.h. But because the benefits outweigh the drawbacks, it is a good change.
432 lines
19 KiB
Python
432 lines
19 KiB
Python
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#
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# generate_dispatch.py
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#
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# Copyright © 2021 Cody Goodson (contact@vibimanx.com)
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# Copyright © 2022 Charles Giessen (charles@lunarg.com)
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
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# documentation files (the “Software”), to deal in the Software without restriction, including without
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# limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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# of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
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# LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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# This file is a part of VkBootstrap
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# https://github.com/charles-lunarg/vk-bootstrap
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# On run, vk.xml is pulled from the master of Khronos's Vulkan-Headers repo and a VkBoostrapDispatch header
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# is generated and placed in VkBoostrap's source directory
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# https://raw.githubusercontent.com/KhronosGroup/Vulkan-Headers/master/registry/vk.xml
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# This script makes use of xmltodict
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# https://github.com/martinblech/xmltodict
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# User will be prompted to install if not detected
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# Command Line Arguments
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# [--auto] Don't ask for input from the command line
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import sys
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import os
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import subprocess
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import copy
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import codecs
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import re
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from string import Template
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import urllib.request
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import pkg_resources
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# Exclusions
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exclusions = [
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'vkGetDeviceProcAddr',
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'vkCreateDevice',
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'vkDestroyDevice'
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]
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# Excluded extension authors - don't generate anything for these types of extensions
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excluded_extension_authors = [
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'NVX'
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]
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excluded_alias_types = [
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'VkPipelineInfoKHR'
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]
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# Check for/install xmltodict
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installed = {pkg.key for pkg in pkg_resources.working_set}
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xmltodict_missing = {'xmltodict'} - installed
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# Install xmltodict
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if xmltodict_missing:
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if '--auto' not in sys.argv:
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val = input('xmltodict is required to run this script. Would you like to install? (y/n): ')
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else:
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val = 'y'
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if val.lower() == 'y':
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try:
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subprocess.check_call([sys.executable, '-m', 'pip', 'install', 'xmltodict'])
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except subprocess.CalledProcessError as error:
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print('Failed to install xmltodict due to error:')
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print(error)
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if '--auto' not in sys.argv:
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input('Press Enter to continue...')
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sys.exit()
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else:
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sys.exit()
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# Fetch fresh vk.xml from Khronos repo
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import xmltodict
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try:
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response = urllib.request.urlopen('https://raw.githubusercontent.com/KhronosGroup/Vulkan-Headers/main/registry/vk.xml')
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except urllib.error.URLError as error:
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print('Failed to download vk.xml due to error:')
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print(error.reason)
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if '-q' not in sys.argv:
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input('Press Enter to continue...')
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sys.exit()
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vk_xml_raw = response.read()
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vk_xml = xmltodict.parse(vk_xml_raw,process_namespaces=True)
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command_params = {'return_type': '', 'args': [], 'dispatch_type': '', 'requirements': [], 'macro_template': Template('')}
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commands = {}
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INSTANCE = 'instance'
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DEVICE = 'device'
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# No good way to detect incompatibilities with the macro defines and the actual functions. Just keep a list here
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HEADER_VERSION_WORKAROUNDS = {
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'vkGetLatencyTimingsNV': '271', # Changed API parameters
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'vkCmdSetDiscardRectangleEnableEXT': '241', # new function in older extension
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'vkCmdSetDiscardRectangleModeEXT': '241', # new function in older extension
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'vkCmdSetExclusiveScissorEnableNV': '241', # new function in older extension
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}
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def get_macro_guard(reqs_collection, command_name):
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guard = ''
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count = len(reqs_collection)
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if count > 0:
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while count > 0:
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for reqs in reqs_collection:
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reqs_count = len(reqs)
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guard += '('
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for req in reqs:
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guard += f'defined({req})'
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reqs_count -= 1
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if reqs_count > 0:
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guard += ' && '
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guard += ')'
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if count > 0:
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count -= 1
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if count > 0:
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guard += ' || '
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# API breaking change causes this function to fail compilation
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for function, version in HEADER_VERSION_WORKAROUNDS.items():
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if command_name == function:
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guard = f'({guard}) && VK_HEADER_VERSION >= {version}'
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return guard
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aliased_types = {}
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types_node = vk_xml['registry']['types']['type']
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for type_node in types_node:
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if '@alias' in type_node:
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aliased_types[type_node['@alias']] = type_node['@name']
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# Gather all device functions/aliases for filtering core/extension function fetching
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commands_node = vk_xml['registry']['commands']['command']
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aliases = {}
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for command_node in commands_node:
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if 'proto' in command_node:
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command_name = command_node['proto']['name']
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new_command_params = copy.deepcopy(command_params)
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new_command_params['return_type'] = command_node['proto']['type']
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if isinstance(command_node['param'], list):
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params = command_node['param']
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else:
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params = [command_node['param']]
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new_command_params['args'] = []
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for param in params:
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# if the api attribute does exist, make sure it is for vulkan
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if not '@api' in param or param['@api'] == 'vulkan':
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new_command_params['args'].append(param)
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if not command_name in exclusions:
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commands[command_name] = new_command_params
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commands[command_name]['is_alias'] = False
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if new_command_params['args'][0]['type'] in ['VkDevice', 'VkCommandBuffer', 'VkQueue']:
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commands[command_name]['dispatch_type'] = DEVICE
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elif new_command_params['args'][0]['type'] in ['VkInstance', 'VkPhysicalDevice']:
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commands[command_name]['dispatch_type'] = INSTANCE
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elif '@alias' in command_node:
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aliases[command_node['@alias']] = command_node['@name']
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# Push the alias name as a device function if the alias exists in device commands
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for aliased_type, alias in aliases.items():
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if aliased_type in commands:
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commands[alias] = copy.deepcopy(commands[aliased_type])
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commands[alias]['is_alias'] = True
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# Add requirements for core PFN's
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features_node = vk_xml['registry']['feature']
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for feature_node in features_node:
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if feature_node['@name'] != 'VK_VERSION_1_0':
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for require_node in feature_node['require']:
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for param_node in require_node:
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if param_node == 'command':
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if not isinstance(require_node[param_node], list):
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require_node[param_node] = [require_node[param_node]]
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for param in require_node[param_node]:
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if param['@name'] in commands:
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commands[param['@name']]['requirements'] += [[feature_node['@name']]]
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# Add requirements for extension PFN's
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extensions_node = vk_xml['registry']['extensions']['extension']
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for extension_node in extensions_node:
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extension_name = extension_node['@name']
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if 'require' in extension_node.keys():
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require_nodes = extension_node['require']
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for require_node in require_nodes:
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requirements = [extension_name]
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if not isinstance(require_node, str):
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if 'command' in require_node.keys():
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if '@feature' in require_node.keys():
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requirements.append(require_node['@feature'])
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if '@extension' in require_node.keys():
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requirements.extend(require_node['@extension'].split(','))
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if not isinstance(require_node['command'], list):
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require_node['command'] = [require_node['command']]
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for command_node in require_node['command']:
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if command_node['@name'] in commands:
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if '@author' in extension_node and extension_node['@author'] in excluded_extension_authors:
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commands.pop(command_node['@name'])
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else:
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commands[command_node['@name']]['requirements'] += [requirements]
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elif require_node == 'command':
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if not isinstance(require_nodes['command'], list):
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require_nodes['command'] = [require_nodes['command']]
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for command_node in require_nodes['command']:
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if command_node['@name'] in commands:
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if '@author' in extension_node and extension_node['@author'] in excluded_extension_authors:
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commands.pop(command_node['@name'])
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else:
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commands[command_node['@name']]['requirements'] += [requirements]
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# Generate macro templates
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for command_name, command in commands.items():
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if len(commands[command_name]['requirements']) > 0:
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macro_guard = get_macro_guard(commands[command_name]['requirements'], command_name)
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macro = f'#if {macro_guard}\n$body#endif\n'
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else:
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macro = '$body'
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commands[command_name]['macro_template'] = Template(macro)
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for command_name, command in commands.items():
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if len(commands[command_name]['requirements']) > 0:
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macro_guard = get_macro_guard(commands[command_name]['requirements'], command_name)
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pfn_decl_macro = f'#if {macro_guard}\n$body#else\n void * fp_{command_name}{{}};\n#endif\n'
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else:
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pfn_decl_macro = '$body'
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commands[command_name]['pfn_decl_macro_template'] = Template(pfn_decl_macro)
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# License
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dispatch_license = '''/*
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* Copyright © 2021 Cody Goodson (contact@vibimanx.com)
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* Copyright © 2022 Charles Giessen (charles@lunarg.com)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
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* documentation files (the “Software”), to deal in the Software without restriction, including without
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* limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
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* LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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'''
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# Info
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info = '// This file is a part of VkBootstrap\n'
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info += '// https://github.com/charles-lunarg/vk-bootstrap\n\n'
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# # Content
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head = '\n#pragma once\n\n#include <vulkan/vulkan_core.h>\n\n'
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head += 'namespace vkb {\n\n'
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def create_dispatch_table(dispatch_type):
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out = ''
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if dispatch_type == INSTANCE:
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out += 'struct InstanceDispatchTable {\n'
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out += ' InstanceDispatchTable() = default;\n'
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out += ' InstanceDispatchTable(VkInstance instance, PFN_vkGetInstanceProcAddr procAddr) : instance(instance), populated(true) {\n'
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else:
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out += 'struct DispatchTable {\n'
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out += ' DispatchTable() = default;\n'
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out += ' DispatchTable(VkDevice device, PFN_vkGetDeviceProcAddr procAddr) : device(device), populated(true) {\n'
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proxy_section = ''
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fp_decl_section = ''
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pfn_load_section = ''
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proxy_template = Template(' $return_type $proxy_name($args_full) const noexcept {\n $opt_return$fp_name($args_names);\n }\n')
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fp_decl_template = Template(' $pfn_name $fp_name = nullptr;\n')
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if dispatch_type == INSTANCE:
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pfn_load_template = Template(' $fp_name = reinterpret_cast<$pfn_name>(procAddr(instance, "$command_name"));\n')
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else:
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pfn_load_template = Template(' $fp_name = reinterpret_cast<$pfn_name>(procAddr(device, "$command_name"));\n')
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for command_name, command in commands.items():
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if command['dispatch_type'] != dispatch_type:
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continue
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params = commands[command_name]
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# easy stuff out of the way
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return_type = params['return_type']
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if return_type != 'void':
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opt_return = 'return '
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else:
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opt_return = ''
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proxy_name = command_name[2].lower() + command_name[3:]
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fp_name = 'fp_' + command_name
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pfn_name = 'PFN_' + command_name
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# Now for args
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arg_template = Template('$front_mods$arg_type$back_mods$arg_name$array')
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args_full = ''
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args_names = ''
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args_count = len(params['args'])
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i = args_count
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for arg in params['args']:
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front_mods = ''
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back_mods = ' '
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array = ''
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arg_type = arg['type']
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arg_name = arg['name']
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if '#text' in arg:
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text = arg['#text']
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text = text.replace(' ', '')
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array_index = text.find('[')
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if array_index != -1:
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array = text[array_index:]
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text = text[0:array_index]
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if text == '*':
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front_mods = ''
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back_mods = '* '
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elif text == '**':
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front_mods = ''
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back_mods = '** '
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elif text == 'struct*':
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front_mods = 'struct '
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back_mods = '* '
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elif text == 'struct**':
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front_mods = 'struct '
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back_mods = '** '
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elif text == 'const':
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front_mods = 'const '
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back_mods = ' '
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elif text == 'const*':
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front_mods = 'const '
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back_mods = '* '
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elif text == 'const**':
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front_mods = 'const '
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back_mods = '** '
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elif text == 'const*const*':
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front_mods = 'const '
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back_mods = '* const* '
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elif text == 'conststruct*':
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front_mods = 'const struct '
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back_mods = '* '
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else:
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print("Unhandled Text Case!")
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assert(False)
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if i == args_count and (dispatch_type == INSTANCE and arg_type == 'VkInstance') or (dispatch_type == DEVICE and arg_type == 'VkDevice'):
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args_names += arg_name
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if i > 0:
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i -= 1
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if i > 0:
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args_names += ', '
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else:
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if arg_type in aliased_types and arg_type not in excluded_alias_types:
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arg_type = aliased_types[arg_type]
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args_full += arg_template.substitute(front_mods = front_mods, arg_type = arg_type, back_mods = back_mods, arg_name = arg_name, array = array)
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args_names += arg_name
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if i > 0:
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i -= 1
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if i > 0:
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args_full += ', '
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args_names += ', '
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proxy_body = proxy_template.substitute(return_type = return_type, proxy_name = proxy_name, args_full = args_full, opt_return = opt_return, fp_name = fp_name, args_names = args_names)
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fp_decl_body = fp_decl_template.substitute(pfn_name = pfn_name, fp_name = fp_name)
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pfn_load_body = pfn_load_template.substitute(fp_name = fp_name, pfn_name = pfn_name, command_name = command_name)
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macro_template = params['macro_template']
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pfn_decl_macro_template = params['pfn_decl_macro_template']
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proxy_section += macro_template.substitute(body=proxy_body)
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fp_decl_section += pfn_decl_macro_template.substitute(body=fp_decl_body)
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pfn_load_section += macro_template.substitute(body=pfn_load_body)
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out += pfn_load_section
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out += ' }\n'
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out += proxy_section
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out += fp_decl_section
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out += ' bool is_populated() const { return populated; }\n'
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if dispatch_type == INSTANCE:
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out += ' VkInstance instance = VK_NULL_HANDLE;\n'
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else:
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out += ' VkDevice device = VK_NULL_HANDLE;\n'
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out += 'private:\n'
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out += ' bool populated = false;\n'
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out += '};\n\n'
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return out
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tail = '} // namespace vkb'
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# find the version used to generate the code
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for type_node in types_node:
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if '@api' in type_node and type_node['@api'] == 'vulkan' and 'name' in type_node and type_node['name'] == 'VK_HEADER_VERSION_COMPLETE':
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complete_header_version = type_node['#text']
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if '@api' in type_node and type_node['@api'] == 'vulkan' and 'name' in type_node and type_node['name'] == 'VK_HEADER_VERSION':
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vk_header_version = type_node['#text']
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find_number_fields = re.compile('[0-9]+')
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version_fields = find_number_fields.findall(complete_header_version)
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header_version_field = find_number_fields.findall(vk_header_version)[0]
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version_tag = f'{version_fields[1]}.{version_fields[2]}.{header_version_field}'
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path_to_src = os.path.join('src')
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if not os.path.exists(path_to_src):
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path_to_src = os.path.join('..', 'src')
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if not os.path.exists(path_to_src):
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print('Could not find source folder. Is the current directory wrong?')
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sys.exit()
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header_file = codecs.open(os.path.join(path_to_src,'VkBootstrapDispatch.h'), 'w', 'utf-8')
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header_file.write(dispatch_license + info + head + create_dispatch_table('instance') + create_dispatch_table('device') + tail)
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header_file.close()
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path_to_gen = os.path.join('gen')
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if not os.path.exists(path_to_gen):
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path_to_gen = os.path.join('..', 'gen')
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if not os.path.exists(path_to_gen):
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print('Could not find gen folder. Is the current directory wrong?')
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sys.exit()
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# Generate a CMake file that contains the header version used.
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cmake_version_file = codecs.open(os.path.join(path_to_gen,'CurrentBuildVulkanVersion.cmake'), 'w', 'utf-8')
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cmake_version_file.write(f'set(VK_BOOTSTRAP_SOURCE_HEADER_VERSION {version_tag})\n')
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cmake_version_file.write(f'set(VK_BOOTSTRAP_SOURCE_HEADER_VERSION_GIT_TAG v{version_tag})\n')
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cmake_version_file.close()
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print('Generation finished.')
|