[whatwg] Re: Canvas tag

[Dave Hyatt]

There is documentation, but it is WWDC documentation and so I can't 
disclose it.  I'm going to see if I can get approval to publish it.

dave

On Jul 13, 2004, at 11:15 AM, Brad Neuberg wrote:

> Erik, thanks for enumerating those methods.  Dave, is there more 
> documentation than just the source code for the canvas tag?  Are there 
> plans to integrate this tag with the work being done in this group?  
> What is the consensus here on the canvas tag?
>
> Thanks,
>    Brad Neuberg
>    Senior Software Engineer, Rojo
>
> At 10:48 AM 7/13/2004, Dave Hyatt wrote:
>> The various color methods can be overloaded to take CSS colors or to
>> take individual rgb components.  That may not have been obvious from
>> the code.
>>
>> dave
>>
>> On Jul 13, 2004, at 8:18 AM, Erik Arvidsson wrote:
>>
>>> 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.
>>>
>