vk/util: keep track of extension requirements

Signed-off-by: Eric Engestrom <eric@igalia.com>
Reviewed-by: Faith Ekstrand <faith.ekstrand@collabora.com>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21261>

src/vulkan/util/vk_entrypoints.py

@@ -135,7 +135,7 @@ def get_entrypoints(doc, entrypoints_to_defines):
 
         ext_name = extension.attrib['name']
 
-        ext = Extension(ext_name, 1, True)
+        ext = Extension(ext_name, 1, True, None)
         ext.type = extension.attrib['type']
 
         for command in extension.findall('./require/command'):

src/vulkan/util/vk_extensions.py

@@ -10,10 +10,11 @@ def _bool_to_c_expr(b):
     return b
 
 class Extension:
-    def __init__(self, name, ext_version, enable):
+    def __init__(self, name, ext_version, enable, requires):
         self.name = name
         self.ext_version = int(ext_version)
         self.enable = _bool_to_c_expr(enable)
+        self.requires = requires.split(',') if requires else []
 
     def c_android_condition(self):
         # if it's an EXT or vendor extension, it's allowed
@@ -98,6 +99,7 @@ def get_all_exts_from_xml(xml):
         name = ext_elem.attrib['name']
         if not supported and name != 'VK_ANDROID_native_buffer':
             continue
+        requires = ext_elem.attrib.get('requires')
         version = None
         for enum_elem in ext_elem.findall('.require/enum'):
             if enum_elem.attrib['name'].endswith('_SPEC_VERSION'):
@@ -105,7 +107,7 @@ def get_all_exts_from_xml(xml):
                 if 'value' in enum_elem.attrib:
                     assert version is None
                     version = int(enum_elem.attrib['value'])
-        extensions.append(Extension(name, version, True))
+        extensions.append(Extension(name, version, True, requires))
 
     return sorted(extensions, key=extension_order)
 
@@ -130,6 +132,7 @@ def init_exts_from_xml(xml, extensions, platform_defines):
 
         ext = ext_name_map[ext_name]
         ext.type = ext_elem.attrib['type']
+        ext.requires = [ext_name_map[req] for req in ext.requires]
 
 # Mapping between extension name and the android version in which the extension
 # was whitelisted in Android CTS's dEQP-VK.info.device_extensions and