503 lines
18 KiB
Plaintext
503 lines
18 KiB
Plaintext
# Copyright (c) 2013-2019 The Khronos Group Inc.
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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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# Relax NG schema for Khronos Vulkan API Registry XML
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#
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# See https://www.khronos.org/vulkan/
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#
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# This definition is subject to change (mostly in the form of additions)
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namespace xsd = "http://www.w3.org/2001/XMLSchema-datatypes"
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# Toplevel is a <registry> tag.
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# May be led by an optional <comment> tag containing e.g. copyrights.
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start = element registry {
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(
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element comment { text } ? |
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Platforms * |
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Tags * |
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Types * |
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Enums * |
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Commands * |
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Feature * |
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Extensions *
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) *
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}
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# <platforms> defines a group of platform names
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Platforms = element platforms {
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Comment ? ,
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Platform *
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}
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# <platform> defines a single platform name.
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# name - string name of the platform, used as part of extension names
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# protect - preprocessor symbol to include platform headers from <vulkan.h>
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# comment - platform description
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Platform = element platform {
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attribute name { text } ,
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attribute protect { text } ,
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Comment
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}
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# <tags> defines a group of author tags
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Tags = element tags {
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Comment ? ,
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Tag *
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}
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# <tag> defines a single author tag.
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# name - name of the tag
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# author - name of the author (usually a company or project name)
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# contact - contact responsible for the tag (name and contact information)
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Tag = element tag {
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attribute name { text } ,
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attribute author { text } ,
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attribute contact { text }
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}
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# <types> defines a group of types
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Types = element types {
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Comment ? ,
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(
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Type |
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element comment { text }
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) *
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}
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# <type> defines a single type. It is usually a C typedef but
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# may contain arbitrary C code.
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# name - name of this type, if not present in the <name> tag
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# api - matches a <feature> api attribute, if present
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# requires - name of another type definition required by this one
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# category - if present, 'enum' indicates a matching <enums>
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# block to generate an enumerated type for, and 'struct'
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# causes special interpretation of the contents of the type
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# tag including ... TBD ...
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# Other allowed values are 'include', 'define', 'handle' and 'bitmask',
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# which don't change syntactic interpretation but allow organization in
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# the generated header.
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# comment - unused
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# parent - only applicable if category is 'handle'. Notes another type with
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# the 'handle' category that acts as a parent object for this type.
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# returnedonly - only applicable if category is 'struct'. Notes that this
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# struct is going to be filled in by the API, rather than an application
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# filling it out and passing it to the API.
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# structextends - only applicable if category is 'struct'. Lists parent
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# structures which this structure may extend via the pNext chain
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# of the parent.
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# When present it suppresses generation of automatic validity for the
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# pNext member of that structure, and instead the structure is added
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# to pNext chain validity for the parent structures it extends.
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# For types without a category, contents include
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# <apientry /> - substitutes for an APIENTRY-style macro on output
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# <name> - contains name of the type being defined
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# <type> - contains name of types used to define this type. There
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# may be multiple imbedded <type> tags
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# For types with category 'enum', contents should be empty
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# For types with category 'struct', contents should be one or more
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# <member> - like <param> for a struct or union member
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# len - if the member is an array, len may be one or more of the following
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# things, separated by commas (one for each array indirection): another
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# member of that struct, 'null-terminated' for a string, '1' to indicate it's
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# just a pointer (used for nested pointers), or a latex equation (prefixed with
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# 'latexmath:')
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# altlen - if len has latexmath equations, this contains equivalent C99
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# expressions separated by commas.
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# externsync - denotes that the member should be externally synchronized
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# when accessed by Vulkan
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# optional - whether this value can be omitted by providing NULL (for
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# pointers), VK_NULL_HANDLE (for handles) or 0 (for bitmasks/values)
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# noautovalidity - tag stating that no automatic validity language should be generated
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# values - comma-separated list of legal values, usually used only for sType enums
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# <comment> - containing arbitrary text (unused)
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#
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# *** There's a problem here: I'm not sure how to represent the <type>
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# syntax where it may contain arbitrarily interleaved text, <type>, and
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# <enum> child tags. This allows only the syntax
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# text <type>name</type> text <enum>name</enum> text
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# where <type> and <enum> are both optional and occur in the specified
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# order, which might eventually be a problem.
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Type = element type {
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attribute api { text } ? ,
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attribute alias { text } ? ,
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attribute requires { text } ? ,
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attribute name { TypeName } ? ,
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attribute category { text } ? ,
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attribute parent { TypeName } ? ,
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attribute returnedonly { text } ? ,
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attribute structextends { text } ? ,
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Comment ? ,
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(
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(
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( text ,
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element type { text } *
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) * ,
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element apientry { text } ? ,
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( text ,
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element type { text } *
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) * ,
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element name { TypeName } ? ,
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( text ,
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element type { text } *
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) *
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) |
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(
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element member {
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attribute len { text } ? ,
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attribute altlen { text } ? ,
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attribute externsync { text } ? ,
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attribute optional { text } ? ,
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attribute noautovalidity { text } ? ,
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attribute values { text } ? ,
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mixed {
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element type { TypeName } ? ,
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element name { text } ,
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element enum { EnumName } ? ,
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element comment { text } ?
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}
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} |
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element comment { text }
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) *
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)
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}
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# <enums> defines a group of enumerants
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# name - identifies a type name associated with this group. Should
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# match a <type> name to trigger generation of the type.
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# start, end - beginning and end of a numeric range
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# vendor - owner of the numeric range
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# type - 'enum' or 'bitmask', if present
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# comment - unused
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Enums = element enums {
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attribute name { text } ? ,
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attribute type { text } ? ,
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attribute start { Integer } ? ,
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attribute end { Integer } ? ,
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Vendor ? ,
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Comment ? ,
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(
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Enum |
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Unused |
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element comment { text}
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) *
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}
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# <enum> defines or references a single enumerant. There are two places it
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# can be used: in an <enums> block, providing a global definition which
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# may later be required by a feature or extension; or in a feature or
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# extension, defining an enumerant specific to that feature. The second
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# form has more possible attributes. Some combinations of attributes are
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# nonsensical in on or the other place, but these are not detected by the
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# validator.
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#
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# Ways to specify the enumerant value:
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# value - integer (including hex) value of the enumerant
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# bitpos - integer bit position of the enumerant in a bitmask
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# [extnumber], offset, [dir] - integer extension number specifying a
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# base block value (inherited from surrounding <extension> if
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# not specified); integer offset in that block; and direction
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# of offset ('-' for negative, positive if not specified).
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# alias - name of another enum this is an alias of
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#
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# value and bitpos allow, and extnumber/offset/dir require:
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# extends - type name of the enumerant being extended
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#
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# Other attributes:
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# api - matches a <feature> api attribute, if present
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# type - 'u' (unsigned), 'ull' (uint64), or integer if not present
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# name - enumerant name
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# alias - another enumerant this is semantically identical to
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# comment - unused
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Enum = element enum {
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(
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(
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(
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attribute value { Integer } &
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attribute extends { TypeName } ?
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) |
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(
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attribute bitpos { Integer } &
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attribute extends { TypeName } ?
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) |
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(
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attribute extnumber { Integer } ? &
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attribute offset { Integer } &
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attribute dir { text } ? &
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attribute extends { TypeName }
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) |
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(
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attribute extends { TypeName } ? &
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attribute alias { TypeName }
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)
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) ? &
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attribute api { text } ? &
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attribute type { TypeSuffix } ? &
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attribute name { text } &
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Comment ?
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)
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}
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# <unused> defines a range of enumerants not currently being used
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# start, end - beginning and end of an unused numeric range
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# vendor - unused
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# comment - unused
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Unused = element unused {
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attribute start { Integer } ,
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attribute end { Integer } ? ,
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Vendor ? ,
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Comment ?
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}
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# <commands> defines a group of commands
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Commands = element commands {
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Comment ? ,
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Command *
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}
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# <command> defines a single command
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#
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# There are two forms of the tag.
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#
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# The first only has 'name' and 'alias' attributes, and no contents.
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# It defines a command alias.
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#
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# The second fully defines a command, and has the following structure:
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# The possible attributes are not described in this comment block yet, but
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# are in readme.pdf.
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#
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# <proto> is the C function prototype, including the return type
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# <param> are function parameters, in order
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# len - if the member is an array, len may be one or more of the following
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# things, separated by commas (one for each array indirection): another
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# member of that struct, 'null-terminated' for a string, '1' to indicate it's
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# just a pointer (used for nested pointers), or a latex equation (prefixed with
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# 'latexmath:')
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# altlen - if len has latexmath equations, this contains equivalent C99
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# expressions separated by commas.
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# externsync - denotes that the member should be externally synchronized
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# when accessed by Vulkan
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# optional - whether this value can be omitted by providing NULL (for
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# pointers), VK_NULL_HANDLE (for handles) or 0 (for bitmasks/values)
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# noautovalidity - tag stating that no automatic validity language should be generated
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# <type> is a <type> name, if present
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# <name> is the function / parameter name
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# The textual contents of <proto> and <param> should be legal C
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# for those parts of a function declaration.
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# <alias> - denotes function aliasing, if present
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# name - name of aliased function
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# <description> - unused text
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# <implicitexternsyncparams> are spec-language descriptions of
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# objects that are not parameters of the command, but
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# are related to them and also require external synchronization.
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Command = element command {
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( attribute name { text } ,
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attribute alias { text } ) |
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(
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attribute queues { text } ? ,
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attribute successcodes { text } ? ,
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attribute errorcodes { text } ? ,
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attribute renderpass { text } ? ,
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attribute cmdbufferlevel { text } ? ,
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attribute pipeline { text } ? ,
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Comment ? ,
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element proto {
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mixed {
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element type { TypeName } ? ,
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element name { text }
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}
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} ,
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element param {
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attribute len { text } ? ,
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attribute altlen { text } ? ,
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attribute externsync { text } ? ,
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attribute optional { text } ? ,
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attribute noautovalidity { text } ? ,
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mixed {
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element type { TypeName } ? ,
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element name { text }
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}
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} * ,
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(
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element alias {
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Name
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} ? &
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element description {
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text
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} ? &
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element implicitexternsyncparams {
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element param { text } *
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} ?
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)
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)
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}
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# Each <feature> defines the interface of an API version (e.g. OpenGL 1.2)
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# api - API tag (e.g. 'gl', 'gles2', etc. - used internally, not
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# necessarily an actual API name
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# name - version name (C preprocessor name, e.g. GL_VERSION_4_2)
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# number - version number, e.g. 4.2
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# protect - additional #ifdef symbol to place around the feature
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# <require> / <remove> contains features to require or remove in
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# this version
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# profile - only require/remove when generated profile matches
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# comment - unused
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Feature = element feature {
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attribute api { text } ,
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Name ,
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attribute number { xsd:float } ,
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attribute protect { text } ? ,
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Comment ? ,
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(
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element require {
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ProfileName ? ,
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ExtensionName ? ,
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Comment ? ,
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(
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InterfaceElement |
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element comment { text }
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) *
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} |
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element remove {
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ProfileName ? ,
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Comment ? ,
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(
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InterfaceElement |
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element comment { text }
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) *
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}
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) *
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}
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Extensions = element extensions {
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Comment ? ,
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Extension *
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}
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# Defines the interface of an API <extension>. Like a <feature>
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# tag, but with slightly different attributes:
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# api - regexp pattern matching one or more API tags, indicating
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# which APIs the extension is known to work with. The only
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# syntax supported is <name>{|<name>}* and each name must
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# exactly match an API being generated (implicit ^$ surrounding).
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# name - extension name string
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# number - extension number (positive integer, should be unique)
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# protect - C preprocessor symbol to conditionally define the interface
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# platform - should be one of the platform names defined in the
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# <platform> tag. Currently unused.
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# author - name of the author (usually a company or project name)
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# contact - contact responsible for the tag (name and contact information)
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# type - 'device' or 'instance', if present
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# requires - commas-separated list of extension names required by this
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# extension
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# requiresCore - core version of Vulkan required by the extension, e.g.
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# "1.1". Defaults to "1.0".
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# supported - profile name(s) supporting this extension, e.g. 'vulkan'
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# or 'disabled' to never generate output.
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# promotedto - Vulkan version or a name of an extension that this
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# extension was promoted to; e.g. 'VK_VERSION_1_1', or
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# 'VK_KHR_draw_indirect_county'
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# deprecatedby - Vulkan version or a name of an extension that deprecates
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# this extension. It may be empty string.
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# e.g. 'VK_VERSION_1_1', or 'VK_EXT_debug_utils', or ''
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# obsoletedby - Vulkan version or a name of an extension that obsoletes
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# this extension. It may be empty string.
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# e.g. 'VK_VERSION_1_1', or 'VK_EXT_debug_utils', or ''
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# provisional - 'true' if this extension is released provisionally
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# In addition, <require> / <remove> tags also support an api attribute:
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# api - only require/remove these features for the matching API.
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# Not a regular expression.
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Extension = element extension {
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Name ,
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attribute number { Integer } ? ,
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attribute protect { text } ? ,
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attribute platform { text } ? ,
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attribute author { text } ? ,
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attribute contact { text } ? ,
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attribute type { text } ? ,
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attribute requires { text } ? ,
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attribute requiresCore { text } ? ,
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attribute supported { StringGroup } ? ,
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attribute promotedto { text } ? ,
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attribute deprecatedby { text } ? ,
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attribute obsoletedby { text } ? ,
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attribute provisional { text } ? ,
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Comment ? ,
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(
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element require {
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attribute api { text } ? ,
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ProfileName ? ,
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ExtensionName ? ,
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FeatureName ? ,
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Comment ? ,
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(
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InterfaceElement |
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element comment { text }
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) *
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} |
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element remove {
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attribute api { text } ? ,
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ProfileName ? ,
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Comment ? ,
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(
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InterfaceElement |
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element comment { text }
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) *
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}
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) *
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}
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# Contents of a <require> / <remove> tag, defining a group
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# of features to require or remove.
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# <type> / <enum> / <command> all have attributes
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# name - feature name which must match
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InterfaceElement =
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element type {
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Name ,
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Comment ?
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} |
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Enum |
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element command {
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Name ,
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Comment ?
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}
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# Integers are allowed to be either decimal or C-hex (0x[0-9A-F]+), but
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# XML Schema types don't seem to support hex notation, so we use this
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# as a placeholder.
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Integer = text
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# EnumName is an compile-time constant name
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EnumName = text
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# TypeName is an argument/return value C type name
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TypeName = text
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# TypeSuffix is a C numeric type suffix, e.g. 'u' or 'ull'
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TypeSuffix = text
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# StringGroup is a regular expression with an implicit
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# '^(' and ')$' bracketing it.
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StringGroup = text
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# Repeatedly used attributes
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ProfileName = attribute profile { text }
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ExtensionName = attribute extension { text }
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FeatureName = attribute feature { text }
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Vendor = attribute vendor { text }
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Comment = attribute comment { text }
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Name = attribute name { text }
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