[Webkit-unassigned] [Bug 98504] [CSS Shaders] Implement overlay, color-dodge, color-burn, hard-light, soft-light blend modes.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=98504





--- Comment #9 from Huang Dongsung <luxtella at company100.net>  2012-10-10 23:41:05 PST ---
(In reply to comment #7)
> Regarding clamp, my assumption was that some of these expressions could produce a Co that is out of the range [0.0, 1.0]. That would be a problem because the alpha compositing operation after this blending operation expects colors in the range [0.0, 1.0]. 

I see now why you mentioned clamp. Thank for explanation!

> For the record, OS X Grapher [1] is amazing at analyzing these expressions. I made 3D graphs which mapped Co => z, Cb => x, Cb => y, and verified that z stayed between 0 and 1 while x and y were between 0 and 1.

Wow! :)

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