[whatwg] [canvas] globalCompositeOperation poorly defined

[Arve Bersvendsen]

On Fri, 23 Jun 2006 03:50:39 +0200, L. David Baron <dbaron at dbaron.org>  
wrote:

> The values of globalCompositeOperation are very poorly defined:
>   http://www.whatwg.org/specs/web-apps/current-work/#globalcompositeoperation
> Some math is probably needed; prose alone seems unlikely to be
> sufficient.
>
> I made a quick test at:
>   http://dbaron.org/tests/canvas/composite-operations

There are a number of tests for globalCompositeOperation here:

<URL:http://testsuite.org/html/elements/canvas/getContext/2d/globalCompositeOperation/>

These tests are written pretty much to the letter of the specification,  
but it would be appreciated if someone tried to verify the tests.


-- 
Arve Bersvendsen, Opera Software ASA, http://www.opera.com/