602 lines
24 KiB
Python
602 lines
24 KiB
Python
#!/usr/bin/env python2
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# Copyright 2017 The Dawn Authors
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import json, os, sys
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from collections import namedtuple
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from generator_lib import Generator, run_generator, FileRender
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############################################################
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# OBJECT MODEL
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############################################################
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class Name:
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def __init__(self, name, native=False):
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self.native = native
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if native:
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self.chunks = [name]
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else:
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self.chunks = name.split(' ')
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def CamelChunk(self, chunk):
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return chunk[0].upper() + chunk[1:]
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def canonical_case(self):
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return (' '.join(self.chunks)).lower()
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def concatcase(self):
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return ''.join(self.chunks)
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def camelCase(self):
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return self.chunks[0] + ''.join([self.CamelChunk(chunk) for chunk in self.chunks[1:]])
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def CamelCase(self):
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return ''.join([self.CamelChunk(chunk) for chunk in self.chunks])
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def SNAKE_CASE(self):
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return '_'.join([chunk.upper() for chunk in self.chunks])
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def snake_case(self):
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return '_'.join(self.chunks)
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def concat_names(*names):
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return ' '.join([name.canonical_case() for name in names])
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class Type:
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def __init__(self, name, json_data, native=False):
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self.json_data = json_data
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self.dict_name = name
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self.name = Name(name, native=native)
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self.category = json_data['category']
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EnumValue = namedtuple('EnumValue', ['name', 'value', 'valid'])
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class EnumType(Type):
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def __init__(self, name, json_data):
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Type.__init__(self, name, json_data)
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self.values = [EnumValue(Name(m['name']), m['value'], m.get('valid', True)) for m in self.json_data['values']]
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# Assert that all values are unique in enums
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all_values = set()
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for value in self.values:
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if value.value in all_values:
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raise Exception("Duplicate value {} in enum {}".format(value.value, name))
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all_values.add(value.value)
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BitmaskValue = namedtuple('BitmaskValue', ['name', 'value'])
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class BitmaskType(Type):
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def __init__(self, name, json_data):
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Type.__init__(self, name, json_data)
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self.values = [BitmaskValue(Name(m['name']), m['value']) for m in self.json_data['values']]
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self.full_mask = 0
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for value in self.values:
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self.full_mask = self.full_mask | value.value
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class NativeType(Type):
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def __init__(self, name, json_data):
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Type.__init__(self, name, json_data, native=True)
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class NativelyDefined(Type):
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def __init__(self, name, json_data):
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Type.__init__(self, name, json_data)
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# Methods and structures are both "records", so record members correspond to
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# method arguments or structure members.
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class RecordMember:
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def __init__(self, name, typ, annotation, optional=False,
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is_return_value=False, default_value=None,
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skip_serialize=False):
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self.name = name
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self.type = typ
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self.annotation = annotation
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self.length = None
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self.optional = optional
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self.is_return_value = is_return_value
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self.handle_type = None
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self.default_value = default_value
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self.skip_serialize = skip_serialize
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def set_handle_type(self, handle_type):
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assert self.type.dict_name == "ObjectHandle"
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self.handle_type = handle_type
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Method = namedtuple('Method', ['name', 'return_type', 'arguments'])
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class ObjectType(Type):
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def __init__(self, name, json_data):
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Type.__init__(self, name, json_data)
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self.methods = []
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self.native_methods = []
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self.built_type = None
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class Record:
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def __init__(self, name):
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self.name = Name(name)
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self.members = []
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self.has_dawn_object = False
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def update_metadata(self):
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def has_dawn_object(member):
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if isinstance(member.type, ObjectType):
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return True
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elif isinstance(member.type, StructureType):
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return member.type.has_dawn_object
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else:
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return False
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self.has_dawn_object = any(has_dawn_object(member) for member in self.members)
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class StructureType(Record, Type):
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def __init__(self, name, json_data):
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Record.__init__(self, name)
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Type.__init__(self, name, json_data)
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self.extensible = json_data.get("extensible", False)
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class Command(Record):
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def __init__(self, name, members=None):
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Record.__init__(self, name)
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self.members = members or []
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self.derived_object = None
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self.derived_method = None
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def linked_record_members(json_data, types):
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members = []
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members_by_name = {}
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for m in json_data:
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member = RecordMember(Name(m['name']), types[m['type']],
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m.get('annotation', 'value'),
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optional=m.get('optional', False),
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is_return_value=m.get('is_return_value', False),
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default_value=m.get('default', None),
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skip_serialize=m.get('skip_serialize', False))
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handle_type = m.get('handle_type')
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if handle_type:
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member.set_handle_type(types[handle_type])
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members.append(member)
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members_by_name[member.name.canonical_case()] = member
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for (member, m) in zip(members, json_data):
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if member.annotation != 'value':
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if not 'length' in m:
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if member.type.category != 'object':
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member.length = "constant"
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member.constant_length = 1
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else:
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assert(False)
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elif m['length'] == 'strlen':
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member.length = 'strlen'
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else:
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member.length = members_by_name[m['length']]
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return members
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############################################################
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# PARSE
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############################################################
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def is_native_method(method):
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return method.return_type.category == "natively defined" or \
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any([arg.type.category == "natively defined" for arg in method.arguments])
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def link_object(obj, types):
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def make_method(json_data):
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arguments = linked_record_members(json_data.get('args', []), types)
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return Method(Name(json_data['name']), types[json_data.get('returns', 'void')], arguments)
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methods = [make_method(m) for m in obj.json_data.get('methods', [])]
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obj.methods = [method for method in methods if not is_native_method(method)]
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obj.methods.sort(key=lambda method: method.name.canonical_case())
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obj.native_methods = [method for method in methods if is_native_method(method)]
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def link_structure(struct, types):
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struct.members = linked_record_members(struct.json_data['members'], types)
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# Sort structures so that if struct A has struct B as a member, then B is listed before A
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# This is a form of topological sort where we try to keep the order reasonably similar to the
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# original order (though th sort isn't technically stable).
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# It works by computing for each struct type what is the depth of its DAG of dependents, then
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# resorting based on that depth using Python's stable sort. This makes a toposort because if
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# A depends on B then its depth will be bigger than B's. It is also nice because all nodes
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# with the same depth are kept in the input order.
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def topo_sort_structure(structs):
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for struct in structs:
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struct.visited = False
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struct.subdag_depth = 0
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def compute_depth(struct):
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if struct.visited:
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return struct.subdag_depth
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max_dependent_depth = 0
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for member in struct.members:
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if member.type.category == 'structure':
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max_dependent_depth = max(max_dependent_depth, compute_depth(member.type) + 1)
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struct.subdag_depth = max_dependent_depth
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struct.visited = True
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return struct.subdag_depth
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for struct in structs:
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compute_depth(struct)
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result = sorted(structs, key=lambda struct: struct.subdag_depth)
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for struct in structs:
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del struct.visited
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del struct.subdag_depth
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return result
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def parse_json(json):
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category_to_parser = {
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'bitmask': BitmaskType,
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'enum': EnumType,
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'native': NativeType,
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'natively defined': NativelyDefined,
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'object': ObjectType,
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'structure': StructureType,
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}
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types = {}
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by_category = {}
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for name in category_to_parser.keys():
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by_category[name] = []
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for (name, json_data) in json.items():
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if name[0] == '_':
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continue
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category = json_data['category']
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parsed = category_to_parser[category](name, json_data)
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by_category[category].append(parsed)
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types[name] = parsed
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for obj in by_category['object']:
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link_object(obj, types)
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for struct in by_category['structure']:
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link_structure(struct, types)
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for category in by_category.keys():
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by_category[category] = sorted(by_category[category], key=lambda typ: typ.name.canonical_case())
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by_category['structure'] = topo_sort_structure(by_category['structure'])
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for struct in by_category['structure']:
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struct.update_metadata()
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return {
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'types': types,
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'by_category': by_category
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}
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############################################################
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# WIRE STUFF
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############################################################
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# Create wire commands from api methods
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def compute_wire_params(api_params, wire_json):
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wire_params = api_params.copy()
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types = wire_params['types']
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commands = []
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return_commands = []
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# Generate commands from object methods
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for api_object in wire_params['by_category']['object']:
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for method in api_object.methods:
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command_name = concat_names(api_object.name, method.name)
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command_suffix = Name(command_name).CamelCase()
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# Only object return values or void are supported. Other methods must be handwritten.
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if method.return_type.category != 'object' and method.return_type.name.canonical_case() != 'void':
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assert(command_suffix in wire_json['special items']['client_handwritten_commands'])
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continue
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if command_suffix in wire_json['special items']['client_side_commands']:
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continue
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# Create object method commands by prepending "self"
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members = [RecordMember(Name('self'), types[api_object.dict_name], 'value')]
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members += method.arguments
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# Client->Server commands that return an object return the result object handle
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if method.return_type.category == 'object':
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result = RecordMember(Name('result'), types['ObjectHandle'], 'value', is_return_value=True)
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result.set_handle_type(method.return_type)
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members.append(result)
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command = Command(command_name, members)
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command.derived_object = api_object
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command.derived_method = method
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commands.append(command)
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for (name, json_data) in wire_json['commands'].items():
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commands.append(Command(name, linked_record_members(json_data, types)))
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for (name, json_data) in wire_json['return commands'].items():
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return_commands.append(Command(name, linked_record_members(json_data, types)))
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wire_params['cmd_records'] = {
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'command': commands,
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'return command': return_commands
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}
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for commands in wire_params['cmd_records'].values():
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for command in commands:
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command.update_metadata()
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commands.sort(key=lambda c: c.name.canonical_case())
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wire_params.update(wire_json.get('special items', {}))
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return wire_params
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#############################################################
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# Generator
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#############################################################
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def as_varName(*names):
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return names[0].camelCase() + ''.join([name.CamelCase() for name in names[1:]])
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def as_cType(name):
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if name.native:
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return name.concatcase()
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else:
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return 'WGPU' + name.CamelCase()
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def as_cTypeDawn(name):
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if name.native:
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return name.concatcase()
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else:
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return 'Dawn' + name.CamelCase()
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def as_cTypeEnumSpecialCase(typ):
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if typ.category == 'bitmask':
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return as_cType(typ.name) + 'Flags'
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return as_cType(typ.name)
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def as_cppType(name):
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if name.native:
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return name.concatcase()
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else:
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return name.CamelCase()
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def convert_cType_to_cppType(typ, annotation, arg, indent=0):
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if typ.category == 'native':
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return arg
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if annotation == 'value':
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if typ.category == 'object':
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return '{}::Acquire({})'.format(as_cppType(typ.name), arg)
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elif typ.category == 'structure':
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converted_members = [
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convert_cType_to_cppType(
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member.type, member.annotation,
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'{}.{}'.format(arg, as_varName(member.name)),
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indent + 1)
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for member in typ.members]
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converted_members = [(' ' * 4) + m for m in converted_members ]
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converted_members = ',\n'.join(converted_members)
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return as_cppType(typ.name) + ' {\n' + converted_members + '\n}'
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else:
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return 'static_cast<{}>({})'.format(as_cppType(typ.name), arg)
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else:
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return 'reinterpret_cast<{} {}>({})'.format(as_cppType(typ.name), annotation, arg)
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def decorate(name, typ, arg):
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if arg.annotation == 'value':
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return typ + ' ' + name
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elif arg.annotation == '*':
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return typ + ' * ' + name
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elif arg.annotation == 'const*':
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return typ + ' const * ' + name
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elif arg.annotation == 'const*const*':
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return 'const ' + typ + '* const * ' + name
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else:
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assert(False)
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def annotated(typ, arg):
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name = as_varName(arg.name)
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return decorate(name, typ, arg)
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def as_cEnum(type_name, value_name):
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assert(not type_name.native and not value_name.native)
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return 'WGPU' + type_name.CamelCase() + '_' + value_name.CamelCase()
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def as_cEnumDawn(type_name, value_name):
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assert(not type_name.native and not value_name.native)
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return 'DAWN' + '_' + type_name.SNAKE_CASE() + '_' + value_name.SNAKE_CASE()
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def as_cppEnum(value_name):
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assert(not value_name.native)
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if value_name.concatcase()[0].isdigit():
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return "e" + value_name.CamelCase()
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return value_name.CamelCase()
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def as_cMethod(type_name, method_name):
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assert(not type_name.native and not method_name.native)
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return 'wgpu' + type_name.CamelCase() + method_name.CamelCase()
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def as_cMethodDawn(type_name, method_name):
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assert(not type_name.native and not method_name.native)
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return 'dawn' + type_name.CamelCase() + method_name.CamelCase()
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def as_MethodSuffix(type_name, method_name):
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assert(not type_name.native and not method_name.native)
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return type_name.CamelCase() + method_name.CamelCase()
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def as_cProc(type_name, method_name):
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assert(not type_name.native and not method_name.native)
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return 'WGPU' + 'Proc' + type_name.CamelCase() + method_name.CamelCase()
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def as_cProcDawn(type_name, method_name):
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assert(not type_name.native and not method_name.native)
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return 'Dawn' + 'Proc' + type_name.CamelCase() + method_name.CamelCase()
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def as_frontendType(typ):
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if typ.category == 'object':
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return typ.name.CamelCase() + 'Base*'
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elif typ.category in ['bitmask', 'enum']:
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return 'wgpu::' + typ.name.CamelCase()
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elif typ.category == 'structure':
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return as_cppType(typ.name)
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else:
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return as_cType(typ.name)
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def as_wireType(typ):
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if typ.category == 'object':
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return typ.name.CamelCase() + '*'
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elif typ.category in ['bitmask', 'enum']:
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return 'WGPU' + typ.name.CamelCase()
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else:
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return as_cppType(typ.name)
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def cpp_native_methods(types, typ):
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return sorted(typ.methods + typ.native_methods, key=lambda method: method.name.canonical_case())
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def c_native_methods(types, typ):
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return cpp_native_methods(types, typ) + [
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Method(Name('reference'), types['void'], []),
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Method(Name('release'), types['void'], []),
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]
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def get_methods_sorted_by_name(api_params):
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unsorted = [(as_MethodSuffix(typ.name, method.name), typ, method) \
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for typ in api_params['by_category']['object'] \
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for method in c_native_methods(api_params['types'], typ) ]
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return [(typ, method) for (_, typ, method) in sorted(unsorted)]
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class MultiGeneratorFromDawnJSON(Generator):
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def get_description(self):
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return 'Generates code for various target from Dawn.json.'
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def add_commandline_arguments(self, parser):
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allowed_targets = ['dawn_headers', 'dawncpp_headers', 'dawncpp', 'dawn_proc', 'mock_dawn', 'dawn_wire', "dawn_native_utils"]
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parser.add_argument('--dawn-json', required=True, type=str, help ='The DAWN JSON definition to use.')
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parser.add_argument('--wire-json', default=None, type=str, help='The DAWN WIRE JSON definition to use.')
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parser.add_argument('--targets', required=True, type=str, help='Comma-separated subset of targets to output. Available targets: ' + ', '.join(allowed_targets))
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def get_file_renders(self, args):
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with open(args.dawn_json) as f:
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loaded_json = json.loads(f.read())
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api_params = parse_json(loaded_json)
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|
targets = args.targets.split(',')
|
|
|
|
wire_json = None
|
|
if args.wire_json:
|
|
with open(args.wire_json) as f:
|
|
wire_json = json.loads(f.read())
|
|
|
|
base_params = {
|
|
'Name': lambda name: Name(name),
|
|
|
|
'as_annotated_cType': lambda arg: annotated(as_cTypeEnumSpecialCase(arg.type), arg),
|
|
'as_annotated_cppType': lambda arg: annotated(as_cppType(arg.type.name), arg),
|
|
'as_cEnum': as_cEnum,
|
|
'as_cEnumDawn': as_cEnumDawn,
|
|
'as_cppEnum': as_cppEnum,
|
|
'as_cMethod': as_cMethod,
|
|
'as_cMethodDawn': as_cMethodDawn,
|
|
'as_MethodSuffix': as_MethodSuffix,
|
|
'as_cProc': as_cProc,
|
|
'as_cProcDawn': as_cProcDawn,
|
|
'as_cType': as_cType,
|
|
'as_cTypeDawn': as_cTypeDawn,
|
|
'as_cppType': as_cppType,
|
|
'convert_cType_to_cppType': convert_cType_to_cppType,
|
|
'as_varName': as_varName,
|
|
'decorate': decorate,
|
|
'methods_sorted_by_name': get_methods_sorted_by_name(api_params),
|
|
}
|
|
|
|
renders = []
|
|
|
|
c_params = {'native_methods': lambda typ: c_native_methods(api_params['types'], typ)}
|
|
cpp_params = {'native_methods': lambda typ: cpp_native_methods(api_params['types'], typ)}
|
|
|
|
if 'dawn_headers' in targets:
|
|
renders.append(FileRender('webgpu.h', 'src/include/dawn/webgpu.h', [base_params, api_params, c_params]))
|
|
renders.append(FileRender('dawn.h', 'src/include/dawn/dawn.h', [base_params, api_params, c_params]))
|
|
renders.append(FileRender('dawn_proc_table.h', 'src/include/dawn/dawn_proc_table.h', [base_params, api_params, c_params]))
|
|
|
|
if 'dawncpp_headers' in targets:
|
|
renders.append(FileRender('webgpu_cpp.h', 'src/include/dawn/webgpu_cpp.h', [base_params, api_params, cpp_params]))
|
|
renders.append(FileRender('dawncpp.h', 'src/include/dawn/dawncpp.h', [base_params, api_params, cpp_params]))
|
|
|
|
if 'dawn_proc' in targets:
|
|
renders.append(FileRender('dawn_proc.c', 'src/dawn/dawn_proc.c', [base_params, api_params, c_params]))
|
|
|
|
if 'dawncpp' in targets:
|
|
renders.append(FileRender('webgpu_cpp.cpp', 'src/dawn/webgpu_cpp.cpp', [base_params, api_params, cpp_params]))
|
|
|
|
if 'mock_dawn' in targets:
|
|
renders.append(FileRender('mock_api.h', 'src/dawn/mock_dawn.h', [base_params, api_params, c_params]))
|
|
renders.append(FileRender('mock_api.cpp', 'src/dawn/mock_dawn.cpp', [base_params, api_params, c_params]))
|
|
|
|
if 'dawn_native_utils' in targets:
|
|
frontend_params = [
|
|
base_params,
|
|
api_params,
|
|
c_params,
|
|
{
|
|
'as_frontendType': lambda typ: as_frontendType(typ), # TODO as_frontendType and friends take a Type and not a Name :(
|
|
'as_annotated_frontendType': lambda arg: annotated(as_frontendType(arg.type), arg)
|
|
}
|
|
]
|
|
|
|
renders.append(FileRender('dawn_native/ValidationUtils.h', 'src/dawn_native/ValidationUtils_autogen.h', frontend_params))
|
|
renders.append(FileRender('dawn_native/ValidationUtils.cpp', 'src/dawn_native/ValidationUtils_autogen.cpp', frontend_params))
|
|
renders.append(FileRender('dawn_native/wgpu_structs.h', 'src/dawn_native/wgpu_structs_autogen.h', frontend_params))
|
|
renders.append(FileRender('dawn_native/wgpu_structs.cpp', 'src/dawn_native/wgpu_structs_autogen.cpp', frontend_params))
|
|
renders.append(FileRender('dawn_native/ProcTable.cpp', 'src/dawn_native/ProcTable.cpp', frontend_params))
|
|
|
|
if 'dawn_wire' in targets:
|
|
additional_params = compute_wire_params(api_params, wire_json)
|
|
|
|
wire_params = [
|
|
base_params,
|
|
api_params,
|
|
c_params,
|
|
{
|
|
'as_wireType': as_wireType,
|
|
'as_annotated_wireType': lambda arg: annotated(as_wireType(arg.type), arg),
|
|
},
|
|
additional_params
|
|
]
|
|
renders.append(FileRender('dawn_wire/WireCmd.h', 'src/dawn_wire/WireCmd_autogen.h', wire_params))
|
|
renders.append(FileRender('dawn_wire/WireCmd.cpp', 'src/dawn_wire/WireCmd_autogen.cpp', wire_params))
|
|
renders.append(FileRender('dawn_wire/client/ApiObjects.h', 'src/dawn_wire/client/ApiObjects_autogen.h', wire_params))
|
|
renders.append(FileRender('dawn_wire/client/ApiProcs.cpp', 'src/dawn_wire/client/ApiProcs_autogen.cpp', wire_params))
|
|
renders.append(FileRender('dawn_wire/client/ApiProcs.h', 'src/dawn_wire/client/ApiProcs_autogen.h', wire_params))
|
|
renders.append(FileRender('dawn_wire/client/ClientBase.h', 'src/dawn_wire/client/ClientBase_autogen.h', wire_params))
|
|
renders.append(FileRender('dawn_wire/client/ClientHandlers.cpp', 'src/dawn_wire/client/ClientHandlers_autogen.cpp', wire_params))
|
|
renders.append(FileRender('dawn_wire/client/ClientPrototypes.inc', 'src/dawn_wire/client/ClientPrototypes_autogen.inc', wire_params))
|
|
renders.append(FileRender('dawn_wire/server/ServerBase.h', 'src/dawn_wire/server/ServerBase_autogen.h', wire_params))
|
|
renders.append(FileRender('dawn_wire/server/ServerDoers.cpp', 'src/dawn_wire/server/ServerDoers_autogen.cpp', wire_params))
|
|
renders.append(FileRender('dawn_wire/server/ServerHandlers.cpp', 'src/dawn_wire/server/ServerHandlers_autogen.cpp', wire_params))
|
|
renders.append(FileRender('dawn_wire/server/ServerPrototypes.inc', 'src/dawn_wire/server/ServerPrototypes_autogen.inc', wire_params))
|
|
|
|
return renders
|
|
|
|
def get_dependencies(self, args):
|
|
deps = [os.path.abspath(args.dawn_json)]
|
|
if args.wire_json != None:
|
|
deps += [os.path.abspath(args.wire_json)]
|
|
return deps
|
|
|
|
if __name__ == '__main__':
|
|
sys.exit(run_generator(MultiGeneratorFromDawnJSON()))
|