On Sat, Oct 17, 2009 at 5:37 PM, Oliver Hunt <span dir="ltr"><<a href="mailto:oliver@apple.com">oliver@apple.com</a>></span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div style="word-wrap: break-word;"><br><div><div class="im"><div>On Oct 16, 2009, at 8:10 PM, Robert O'Callahan wrote:</div><br><blockquote type="cite"><div>I think there is a reasonable argument that the spec should be changed so that compositing happens only within the shape. (In cairo terminology, all operators should be bounded.) Perhaps that's what Safari and Chrome developers want.<br>
</div></blockquote><br></div><div>This is the behaviour of the original canvas implementation (and it makes a degree of sense -- it is possible to fake composition implying an infinite 0-alpha surrounding when the default composite operator does not do this, but vice versa is not possible). </div>
</div></div></blockquote><div><br>Can't you just clip to the shape?<br><br></div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div style="word-wrap: break-word;">
<div><div>That said I suspect we are unable to do anything this anymore :-/</div></div></div></blockquote><div><br>If Safari and Chrome currently do bound composition to the shape, and always have, then surely it's not too late to spec that?<br>
</div></div><br>Rob<br>-- <br>"He was pierced for our transgressions, he was crushed for our iniquities; the punishment that brought us peace was upon him, and by his wounds we are healed. We all, like sheep, have gone astray, each of us has turned to his own way; and the LORD has laid on him the iniquity of us all." [Isaiah 53:5-6]<br>