* Use default arguments when undefined arguments are passed.
* Throw TypeError on first invalid argument
* Accept a number 'encoderOptions' as the quality
* Fall through to image/png if an unsupported encoding is requested
* Return "data:," if the canvas has no pixels
* Lower-case the format before testing for support
Remove the undocumented 3rd argument of the emitters (bytes left in buffer).
Add a column to the browser tests that displays JPEGs.
Revise how buffers are allocated.
From "[WHATWG HTML Living Standard]
(https://html.spec.whatwg.org/multipage/indices.html#event-load)", the definition of 'onload':
> Fired at the Window when the document has finished loading; fired at an
element containing a resource (e.g. img, embed) when its resource has finished
loading
To adhere to that specification both handlers should be called as many times as Image loads.
From Google Chrome's Developer Tools:
```js
> function handler(evt) { console.log('img handler: %s', evt.type); }
< undefined
> var img = document.createElement('img')
< undefined
> img.onload = handler
< handler(evt)
> img.onerror = handler
< handler(evt)
> img.src = 'https://www.google.com/images/errors/logo_sm_2.png'; true
< true
< img handler: load
> img.src = 'https://www.google.com/images/errors/logo_sm_2.png'; true
< true
< img handler: load
> img.src = 'https://example.com/404.png'; true
< true
< img handler: error
> img.src = 'https://example.com/404.png'; true
< true
< img handler: error
```
hsl() and hsla() color values are now supported, with corresponding unit tests.
Also added rebeccapurple (from CSS Color Level 4) to the named color list.
Described here:
http://www.w3.org/TR/2dcontext/#dom-context-2d-setlinedash
The test images match on Chrome, but not on Firefox. It looks like
Firefox resets the lineDash to [] when given invalid parameters. My
reading of the spec agrees with Chrome.
Raul Ochoa
Zach Bjornson
Hussein Jafferjee
Michaël Zasso
Linus Unnebäck
kibao
Joe Freeman
Andy Wood
motiz88
Thaddee Tyl
Enno Boland
David Caldwell
William Riancho
TJ Holowaychuk
Brian White
Robert Sköld
atomizer
