IABSD.fr/xenocara/proto/xorgproto/xwaylandproto.txt

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• Author : matthieu
  Date : 2022-08-31 07:43:25
  Hash : 76306a21
  Message : Update xorgproto to version 2022.2 This adds the Xwayland extention definition + fixes

• proto/xorgproto/xwaylandproto.txt

•                         The XWAYLAND Extension
  			    Version 1.0
  			     2022-07-29
  
  1. Introduction
  
  The XWAYLAND extension allows clients to reliably identify whether an X server
  is Xwayland. It does not provide any functionality beyond the absolute minimum
  to identify as extension.
  
  Only Xwayland initializes this extension. Thus, if the extension is present,
  the X server is Xwayland. Clients should not need the protocol detailed in this
  document, a QueryExtension or ListExtensions request is sufficient to check
  whether the extension is present.
  
  The protocol detailed in this document is merely to future-proof this extension
  in case actual functionality is added in the future.
  
  			     ❄ ❄ ❄  ❄  ❄ ❄ ❄
  2. Version History
  
  - 1.0, July 2022: QueryVersion request only
  
  			     ❄ ❄ ❄  ❄  ❄ ❄ ❄
  
  3. Events and Errors
  
  XWAYLAND defines no events or errrors
  
  			     ❄ ❄ ❄  ❄  ❄ ❄ ❄
  
  4. Extension initialization
  
  The name of this extension is "XWAYLAND"
  
  ┌───
     XwlQueryVersion
  	client-major-version:	CARD16
  	client-minor-version:	CARD16
        ▶
  	major-version:		CARD16
  	minor-version:		CARD16
  └───
  
  	The client sends the highest supported version to the server
  	and the server replies with the highest version it supports,
  	but no higher than the requested version. Major versions changes
  	can introduce incompatibilities in existing functionality, minor
  	version changes introduce only backward compatible changes.
  	It is the clients responsibility to ensure that the server
  	supports a version which is compatible with its expectations.
  
  	Backwards compatible changes include addition of new
  	requests.
  
  			     ❄ ❄ ❄  ❄  ❄ ❄ ❄
  
  Appendix A. Protocol Encoding
  
  Syntactic Conventions
  
  This document uses the same syntactic conventions as the core X
  protocol encoding document.
  
  A.1 Common Types
  
  None.
  
  A.2 Protocol Requests
  
  ┌───
      XwlQueryVersion
  	1	CARD8			major opcode
  	1	0			XWAYLAND opcode
  	2	2			length
  	2	CARD16			major version
  	2	CARD16			minor version
        ▶
  	1	1			Reply
  	1				unused
  	2	CARD16			sequence number
  	4	0			reply length
  	2	CARD16			major version
  	2	CARD16			minor version
  	20				unused
  └───
  
  A.3 Protocol Events
  
  The XWAYLAND extension defines no events.
  
  A.4 Protocol Errors
  
  The XWAYLAND extension defines no errors.
  
  			     ❄ ❄ ❄  ❄  ❄ ❄ ❄