- From: Boris Zbarsky <bzbarsky@MIT.EDU>
- Date: Thu, 03 Feb 2011 13:55:21 -0500
It looks like CSS rgba colors with an alpha value of 0 are serialized as rgba() with "0" as the alpha value. in at least Gecko, Webkit, and Presto. It also looks like canvas style color with an alpha value of 0 are serialized as rgba() with "0.0" as the alpha value in Gecko 3.6, Webkit, and Presto. In Gecko 2.0 we made a change to the canvas code to fix some bugs in the serialization by the simple expedient of reusing the well-tested code that CSS colors use. This has the incidental benefit of more behavior consistency for authors. Unfortunately, this makes us not do what these other UAs do, nor do what the current spec draft says. While we can clearly special-case 0 in this code, it seems like an authoring pitfall to have the two different serialization styles, so I would prefer to have consistent behavior between the two. What do other UA vendors think of standardizing on "0" as the serialization for canvas color alpha channels when they're transparent? Alternately, what about using "0.0" for CSS colors? -Boris
Received on Thursday, 3 February 2011 10:55:21 UTC