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Bug 26188 - Add support for opaque canvas
Summary: Add support for opaque canvas
Status: RESOLVED WONTFIX
Alias: None
Product: HTML WG
Classification: Unclassified
Component: HTML5 spec (show other bugs)
Version: unspecified
Hardware: All All
: P1 normal
Target Milestone: ---
Assignee: This bug has no owner yet - up for the taking
QA Contact: HTML WG Bugzilla archive list
URL:
Whiteboard: whatwg-resolved
Keywords:
Depends on:
Blocks:
 
Reported: 2014-06-24 20:25 UTC by rcabanie
Modified: 2016-10-25 14:16 UTC (History)
5 users (show)

See Also:

Attachments

Description rcabanie 2014-06-24 20:25:53 UTC 
spec: http://wiki.whatwg.org/wiki/CanvasOpaque

Both Firefox and Chrome implement this feature. It allows for faster drawing, AA text and potentially save memory.
Comment 1 Michael[tm] Smith 2015-06-16 11:34:34 UTC 
Raising priority and noting as requiring a minor "feature tweak" to an existing feature.
Comment 2 Arron Eicholz 2016-04-27 21:41:09 UTC 
HTML5.1 Bugzilla Bug Triage: Incubation needed

This bug constitutes a request for a new feature of HTML. The current guidelines [1], rather than track such requests as bugs or issues, please create a proposal outlining the desired behavior, or at least a sketch of what is wanted (much of which is probably contained in this bug), and start the discussion/proposal in the WICG [2]. As your idea gains interest and momentum, it may be brought back into HTML through the Intent to Migrate process [3].
[1] https://github.com/w3c/html#contributing-to-this-repository
[2] https://www.w3.org/community/wicg/
[3] https://wicg.github.io/admin/intent-to-migrate.html
Comment 3 rcabanie 2016-10-25 14:16:52 UTC 
This was implemented with the alpha flag of the ImageBitmapRenderingContext

See https://html.spec.whatwg.org/multipage/scripting.html#dom-imagebitmaprenderingcontextsettings-alpha