Canvas 2D Context规范文档
摘要
本规范文档为HTML的canvas元素定义了2D上下文。2D上下文提供了对象、方法和属性，用来绘制并操纵canvas绘图表面上的图形。
本文档的状态
This section describes the status of this document at the time of its publication. Other documents may supersede this document. A list of current W3C publications and the latest revision of this technical report can be found in the W3C technical reports index at http://www.w3.org/TR/.
This is the specification for the 2D Context for the HTML canvas element, published by the HTML Working Group.
If you wish to make comments regarding this document in a manner that is tracked by the W3C, please submit them via using our public issues list. If you cannot do this then you can also e-mail feedback to public-canvas-api@w3.org (subscribe, archives), and arrangements will be made to transpose the comments to our public bug database. All feedback is welcome.
By publishing this Recommendation, W3C expects the functionality specified in this Recommendation will not be affected by changes to Web IDL, CSS Object Model, CSS Images Values, or CSS Fonts as those specifications proceed to Recommendation.
Work on extending this specification typically proceeds through extension specifications which should be consulted to see what new features are being reviewed.
The bulk of the text of this specification is also available in the WHATWG HTML Living Standard, under a license that permits reuse of the specification text.
Work on this specification is also done at the WHATWG. The W3C HTML working group actively pursues convergence of the HTML specification with the WHATWG living standard, within the bounds of theW3C HTML working group charter. There are various ways to follow this work at the WHATWG:
- Commit-Watchers mailing list (complete source diffs): http://lists.whatwg.org/listinfo.cgi/commit-watchers-whatwg.org
- Github commits: https://github.com/whatwg/html/commits
This document has been reviewed by W3C Members, by software developers, and by other W3C groups and interested parties, and is endorsed by the Director as a W3C Recommendation. It is a stable document and may be used as reference material or cited from another document. W3C's role in making the Recommendation is to draw attention to the specification and to promote its widespread deployment. This enhances the functionality and interoperability of the Web.
The old issue list is still available. No changes were done since the previous publication.
During the Candidate Recommendation phase, the group made available an implementation report as well as its companion report for drawFocusIfNeeded and addHitRegion.
This specification is an extension to the HTML5 language. All normative content in the HTML5 specification, unless specifically overridden by this specification, is intended to be the basis for this specification.
This document was produced by a group operating under the 5 February 2004 W3C Patent Policy. W3C maintains a public list of any patent disclosures made in connection with the deliverables of the group; that page also includes instructions for disclosing a patent. An individual who has actual knowledge of a patent which the individual believes contains Essential Claim(s) must disclose the information in accordance with section 6 of the W3C Patent Policy.
This document is governed by the 14 October 2005 W3C Process Document.