[Bug 21944] New: Security on measureText is unneccessary

https://www.w3.org/Bugs/Public/show_bug.cgi?id=21944

            Bug ID: 21944
           Summary: Security on measureText is unneccessary
    Classification: Unclassified
           Product: HTML WG
           Version: unspecified
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: normal
          Priority: P2
         Component: CR HTML Canvas 2D Context
          Assignee: jaymunro@microsoft.com
          Reporter: cabanier@adobe.com
        QA Contact: public-html-bugzilla@w3.org
                CC: mike@w3.org
        Depends on: 21943

+++ This bug was initially created as a clone of Bug #21943 +++

The canvas 2d spec currently states that a font has to be local in order for
measureText to work: 
If doing these measurements requires using a font that has an origin that is
not the same as that of the Document object that owns the canvas element (even
if "using a font" means just checking if that font has a particular glyph in it
before falling back to another font), then the method must throw a
SecurityError exception.
http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#dom-context-2d-measuretext
http://www.w3.org/TR/2dcontext/#dom-context-2d-measuretext

After a small discussion on the mailing list, we agreed that the spec should
not have this text. Instead it should be silent and rely on the general font
loading algorithm that CSS specifies.

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Received on Monday, 6 May 2013 21:30:02 UTC