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[Bug 19043] New: The ability to lock individual channels (i.e. prevent them from being updated by drawing functions) would allow for some interesting composition tricks, such as drawing directly to the alpha channel.

From: <bugzilla@jessica.w3.org>
Date: Tue, 25 Sep 2012 21:59:03 +0000
To: public-html@w3.org
Message-ID: <bug-19043-2495@http.www.w3.org/Bugs/Public/>
https://www.w3.org/Bugs/Public/show_bug.cgi?id=19043

           Summary: The ability to lock individual channels (i.e. prevent
                    them from being updated by drawing functions) would
                    allow for some interesting composition tricks, such as
                    drawing directly to the alpha channel.
           Product: HTML WG
           Version: unspecified
          Platform: All
               URL: http://www.whatwg.org/specs/web-apps/current-work/#com
                    positing
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P3
         Component: HTML5 spec
        AssignedTo: dave.null@w3.org
        ReportedBy: contributor@whatwg.org
         QAContact: public-html-bugzilla@w3.org
                CC: ian@hixie.ch, mike@w3.org,
                    public-html-wg-issue-tracking@w3.org,
                    public-html@w3.org


This was was cloned from bug 11399 as part of operation LATER convergence.
Originally filed: 2010-11-24 17:23:00 +0000

================================================================================
 #0   contributor@whatwg.org                          2010-11-24 17:23:13 +0000 
--------------------------------------------------------------------------------
Specification: http://www.whatwg.org/specs/web-apps/current-work/
Section:
http://www.whatwg.org/specs/web-apps/current-work/complete.html#compositing

Comment:
The ability to lock individual channels (i.e. prevent them from being updated
by drawing functions) would allow for some interesting composition tricks,
such as drawing directly to the alpha channel.

Posted from: 87.114.199.5
================================================================================
 #1   Ian 'Hixie' Hickson                             2011-01-10 22:08:52 +0000 
--------------------------------------------------------------------------------
EDITOR'S RESPONSE: This is an Editor's Response to your comment. If you are
satisfied with this response, please change the state of this bug to CLOSED. If
you have additional information and would like the editor to reconsider, please
reopen this bug. If you would like to escalate the issue to the full HTML
Working Group, please add the TrackerRequest keyword to this bug, and suggest
title and text for the tracker issue; or you may create a tracker issue
yourself, if you are able to do so. For more details, see this document:
   http://dev.w3.org/html5/decision-policy/decision-policy.html

Status: Partially Accepted
Change Description: none yet
Rationale: Seems reasonable, but probably best to wait until the rest of the
spec is more stable before adding more canvas features.
================================================================================
 #3   Ian 'Hixie' Hickson                             2012-02-29 19:18:26 +0000 
--------------------------------------------------------------------------------
Punting again. Mostly working on path stuff on this iteration.
================================================================================

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Received on Tuesday, 25 September 2012 21:59:07 GMT

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