[1] Web Applications 1.0 r8078 Defer to Rik's spec for globalCompositeOperation ( ( 版)) <http://html5.org/tools/web-apps-tracker?from=8077&to=8078>
[2] Compositing and Blending Level 1 ( ( 版)) <http://dev.w3.org/fxtf/compositing-1/>
[3] Safari 7.0 ( 版) <https://developer.apple.com/library/safari/releasenotes/General/WhatsNewInSafari/Articles/Safari_7_0.html#//apple_ref/doc/uid/TP40014305-CH5-SW16>
The globalCompositeOperation property now supports several new blending and compositing modes for combining colors:
normal
multiply
screen
overlay
darken
lighten
color-dodge
color-burn
hard-light
soft-light
difference
exclusion
hue
saturation
color
luminosity
clear
copy
destination
source-over
destination-over
source-in
destination-in
source-out
destination-out
source-atop
destination-atop
xor
lighter