211 lines
8.0 KiB
Plaintext
211 lines
8.0 KiB
Plaintext
// Copyright (c) 2014-2016 Khronos Group. This work is licensed under a
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// Creative Commons Attribution 4.0 International License; see
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// http://creativecommons.org/licenses/by/4.0/
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= Vulkan^(R)^ Documentation and Extensions: Procedures and Conventions
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Jon Leech, Tobias Hector
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include::specversion.txt[]
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:toc2:
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:toclevels: 3
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:max-width: 100
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:numbered:
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:doctype: book
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:imagewidth: 800
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:fullimagewidth: {svgpdf@pdf:scaledwidth="75%":width="800"}
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:cl: :
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// Various special / math symbols. This is easier to edit with than Unicode.
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include::config/attribs.txt[]
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:leveloffset: 1
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// :icons:
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// :toc-placement: manual
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<<<<
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include::copyright-ccby.txt[]
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<<<<
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[[introduction]]
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= Introduction
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This document contains required procedures and conventions when writing
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specifications for new Vulkan APIs, extensions and layers, or related
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Khronos documentation such as white papers and tutorials; or contributing to
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existing Vulkan specifications.
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These are collectively referred to as _Vulkan Documentation_ or just
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_documentation_ below.
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The primary focus is the API Specification and API extensions, although all
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of the markup and most of the writing style is equally applicable to other
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documentation.
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The primary purpose is to achieve consistency across the API, as well as
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across all of our source and output documents.
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Consistency makes it easier for developers, editors, reviewers, and users of
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our documentation to understand and modify it.
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This document is now formally voted on and approved by the Vulkan Working
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Group.
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This means that unless explicitly stated otherwise, the procedures and
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conventions must be followed If you have a strong desire to modify the
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procedures and conventions, such changes must be made through the normal
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Vulkan Working Group processes.
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[[introduction-terminology]]
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== Terminology
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The key words *must*, *must not*, *required*, *shall*, *shall not*,
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*should*, *should not*, *recommend*, *may*, and *optional* in this document
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are to be interpreted as described in RFC 2119 and by the Vulkan 1.0
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Specification in the ``Terminology'' section.
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[[introduction-structure]]
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== Document Structure
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The style guide is broken into four sections:
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* <<naming,API Naming Conventions>> - the required rules for choosing
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names of Vulkan identifiers of all types.
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* <<extensions,Extensions and Layers>> - the required procedures for
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creating formal Vulkan extensions and layers.
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* <<markup,Markup Style>> - the required and recommended markup style for
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writing asciidoc and XML source that follows consistent formatting and
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layout guidelines, tags special terms and phrases for proper processing
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by the spec generation tools, etc.
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* <<writing,Writing Style>> - the required and recommended writing style
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for overall and fine-grained structure and conventions, normative
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language use, API naming conventions, common words and phrases to use
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and to avoid, linking and cross-referencing, etc.
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[[introduction-asciidoc]]
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== Asciidoc Markup
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Vulkan Documentation is primarily written in Asciidoc, a form of text markup
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language.
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Asciidoc is documented on its website at http://www.asciidoc.org/.
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[[userguide]]
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References to the Asciidoc User Guide are to sections in the document at
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http://asciidoc.org/userguide.html .
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Asciidoc packages are available for Linux, MacOS, and Microsoft Windows,
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together with the other toolchain components required to generate output
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documents corresponding to the markup.
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[NOTE]
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.Note
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====
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We are currently using the original _asciidoc_ tool.
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Other tools to process Asciidoc markup, such as _asciidoctor_, are also
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available, but are not currently usable for our documents.
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While asciidoctor supports the basic Asciidoc markup syntax, it does not
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support asciidoc macros, which are used extensively in the documentation.
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We expect to transition from asciidoc to asciidoctor eventually.
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There may be minor effects on markup and if so, we will document them at the
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time of the transition.
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====
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The asciidoc toolchain and build process are not addressed by this document,
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which concentrates solely on source documents.
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[[introduction-normative]]
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== Normative References
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Normative references are references to external documents or resources to
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which documentation authors must comply.
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[[iso-8601]]
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International Organization for Standardization, _Data elements and
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interchange formats -- Information interchange -- Representation of dates
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and times_, http://www.iso.org/iso/catalogue_detail?csnumber=40874,
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2004-12-01.
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Also see https://www.w3.org/QA/Tips/iso-date for colloquial examples.
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[[vulkan-docs]]
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Khronos Vulkan Working Group, +KhronosGroup/Vulkan-Docs+ project on GitHub,
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https://github.com/KhronosGroup/Vulkan-Docs, 2016-07-05.
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[[vulkan-spec]]
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Vulkan Working Group, _Vulkan 1.0.27 - A Specification_,
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https://www.khronos.org/registry/vulkan/, 2016-09-16
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Version 1.0.27 is the latest patch release of the Vulkan API Specification
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as of the time this reference was created, but that Specification is
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frequently updated with minor bugfixes and clarifications.
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When a more recent patch release is made, it becomes the normative reference
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for the API.
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// Chapters of the text are included below
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include::style/naming.txt[]
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include::style/extensions.txt[]
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include::style/markup.txt[]
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include::style/writing.txt[]
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= Still To Be Done
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* Something about Image formats
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* Something about validation scripts
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* Something about pictures
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* Glossary lists
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* New param/enum macros
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= Revision History
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* 2016-09-28 - Add asciidoc math markup guidelines.
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* 2016-09-16 - Make style guide markup more consistent with its own
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recommendations.
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Simplify some tables of preferred terms.
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Add sections on block and table markup.
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* 2016-09-12 - Describe writing and markup style for labelled lists.
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Require use of the ISO 8601 date format except in rare legacy cases.
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Expand the description of <<markup-layout,Line Lengths>> and add a
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description of markup for <<markup-footnotes,Footnotes>>.
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* 2016-09-08 - Add a writing section about proper use of
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<<writing-misc-a-an,``a'' and ``an''>> (internal issue 432).
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* 2016-08-30 - Remove mustnot{cl} and shouldnot{cl} macro definitions, which
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are no longer used in the Specification (internal issue 407).
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* 2016-08-29 - Add spelling and compound word rules (public issue 352).
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* 2016-08-23 - Modify description of specifying extensions in the
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<<extensions,Layers and Extensions>> chapter to refer to the new
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single-branch model for extensions (internal issue 397).
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* 2016-07-26 - Add section describing <<writing-refpages,markup for
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automatic reference page extraction>>.
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* 2016-07-18 - Add examples of function-parameter and structure-member
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markup (based on public issue 286).
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* 2016-07-11 - Change the document title.
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* 2016-07-07 - Rename document, change license to CC BY, clarify required
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and recommended actions, and reserve use of ``normative'' for the
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Specifications.
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* 2016-06-26 - Move Layers and Extensions chapter from Appendix C of the
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Vulkan API Specification and merge content with the naming guide.
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Put extension and naming chapters into their own source files.
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* 2016-06-20 - Add API naming guide.
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* 2016-05-22 - Add markup and image creation rules, after fixing missing
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figure captions for public issue 219.
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* 2016-05-01 - Include feedback from public issues 120 and 190.
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Use consistent conventions for defining structures.
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Use American rather than British spelling conventions.
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* 2016-03-12 - Recommend against "the value of".
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* 2016-02-26 - Replace use of the "maynot{cl}" macro with "may{cl} not".
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* 2016-02-16 - Place asciidoc conversion post-release.
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* 2016-02-09 - Added quotation mark convention.
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* 2016-02-01 - Add the Oxford Comma section and issue resolution.
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* 2016-01-26 - Add bullet-list style description of command parameters.
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* 2016-01-11 - Add ``Numbers in Text'' section from WSI work.
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* 2015-12-16 - Make ``begin / end'' preferred terms to ``start / finish''.
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* 2015-12-15 - Make ``implementation'' preferred term instead of ``system''.
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* 2015-12-13 - Add tlink{cl}/tname{cl} macros for function pointer types.
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* 2015-12-10 - Initial release for feedback.
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