[whatwg] Canvas performance issue: setting colors
gregory.houston at gmail.com
Fri Oct 3 17:55:36 PDT 2008
On Fri, Oct 3, 2008 at 6:37 PM, Oliver Hunt <oliver at apple.com> wrote:
> <thinking out loud>
> Just had a thought (no idea how original) -- how about if fillStyle were
> able to accept a 3 or 4 number array? eg. fillStyle = [0, 0.3, 0.6, 1.0] ?
> That might work well if people are using arrays as vectors/colours
> </thinking out loud>
I have an application that allows the developer to set color options
for most of the canvas shapes in the application. The options are
stored as arrays:
myColor: [255, 0, 0]
to apply them:
ctx.fillStyle = 'rgb(' + myColor.join(',') + ')';
Being able to simply write the following, as would be the case with
your idea, would be nice.
ctx.fillStyle = myColor;
Another example of using arrays for colors, both RGB and HSB can be
Note that also like your example the Mootools color plugin does not
have separate rgb and rgba methods. It is smart enough to recognize
that if there is a fourth value in the array it refers to the alpha. I
never quite grasped why there is both an rgb() and rgba() in canvas.
It seems like rgb is all that would have been necessary, and if a
fourth value is passed it obviously refers to the alpha.
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