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Bug 11399 - <canvas>: Locking individual color channels (e.g. drawing to alpha only)
Summary: <canvas>: Locking individual color channels (e.g. drawing to alpha only)
Status: RESOLVED WONTFIX
Alias: None
Product: WHATWG
Classification: Unclassified
Component: HTML (show other bugs)
Version: unspecified
Hardware: All All
: P3 enhancement
Target Milestone: 2015 Q3
Assignee: Ian 'Hixie' Hickson
QA Contact: contributor
URL: https://www.w3.org/Bugs/Public/show_b...
Whiteboard:
Keywords: a11y, a11y_canvas
: 13096 (view as bug list)
Depends on:
Blocks:
 
Reported: 2010-11-24 17:23 UTC by contributor
Modified: 2017-07-21 10:36 UTC (History)
8 users (show)

See Also:

Attachments

Description contributor 2010-11-24 17:23:13 UTC 
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
Comment 1 Ian 'Hixie' Hickson 2011-01-10 22:08:52 UTC 
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.
Comment 2 Michael[tm] Smith 2011-08-04 05:04:01 UTC 
mass-move component to LC1
Comment 3 Ian 'Hixie' Hickson 2012-02-29 19:18:26 UTC 
Punting again. Mostly working on path stuff on this iteration.
Comment 4 public-rdfa-wg 2013-01-24 06:55:42 UTC 
This bug was cloned to create HTML WG bug 19043.
Comment 5 Ian 'Hixie' Hickson 2013-03-18 22:28:21 UTC 
Are there browser vendors interested in implementing this?
Comment 6 Ian 'Hixie' Hickson 2013-04-09 17:49:01 UTC 
(Apparently yes. I'll deal with this via the WHATWG threads and then loop back on this bug.)
Comment 7 Ian 'Hixie' Hickson 2014-07-28 23:54:32 UTC 
*** Bug 13096 has been marked as a duplicate of this bug. ***
Comment 8 Anne 2017-07-21 10:36:02 UTC 
Please file a new issue at https://github.com/whatwg/html/issues/new if there's still interest.