[whatwg] Re: Canvas tag
Erik Arvidsson
erik at eae.net
Tue Jul 13 08:18:55 PDT 2004
After some digging in the webcore source files online at
http://www.opensource.apple.com/darwinsource/WWDC2004/WebCore-146.1/ I
found the following methods on the Context2D object which you get from
the canvas element
save Arguments 0
restore Arguments 0
scale Arguments 2
rotate Arguments 2
translate Arguments 1
beginPath Arguments 0
closePath Arguments 0
setStrokeColor Arguments 1
setFillColor Arguments 1
setLineWidth Arguments 1
setLineCap Arguments 1
setLineJoin Arguments 1
setMiterLimit Arguments 1
fillPath Arguments 0
strokePath Arguments 0
moveToPoint Arguments 2
addLineToPoint Arguments 2
addQuadraticCurveToPoint Arguments 4
addBezierCurveToPoint Arguments 6
addArcToPoint Arguments 5
addArc Arguments 6
addRect Arguments 4
clip Arguments 0
clearRect Arguments 4
fillRect Arguments 4
strokeRect Arguments 4
drawImage Arguments 6
drawImageFromRect Arguments 10
setShadow Arguments 3
clearShadow Arguments 0
setAlpha Arguments 1
setCompositeOperation Arguments 1
See
http://www.opensource.apple.com/darwinsource/WWDC2004/WebCore-146.1/khtml/ecma/kjs_html.cpp
for complete source code.
This looks pretty good and seems very useful. One thing that struck me
as wrong was that the colors could not be provided as HSB which is
supported by CSS3 so it would make sense to allow that as well.
erik
Malcolm Rowe wrote:
> There's not been any discussion of <canvas> yet, though there has been
> on <input type=range>. What David said on his weblog was:
> "We are willing to discuss these elements in an open forum like the
> WHAT-WG. You can see our proposal for canvas and for the new form
> controls, since we released the complete source of these extensions in
> WebCore-146, and anyone can download it to view the current APIs."
> I imagine that if you can get hold of 'WebCore-146' (whatever that is),
> you'll be able to find what you're looking for.
> It is entirely possible, of course, that David has 'submitted' <canvas>
> privately to the WHATWG members (of which he's one himself, as it
> happens), but I'd suggest that that is pretty unlikely.
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