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Re: [css3-color] #rrggbbaa annotation

From: Brad Kemper <brad.kemper@gmail.com>
Date: Tue, 18 May 2010 10:49:09 -0700
Cc: Simon Fraser <smfr@me.com>, Patrick Garies <pgaries@fastmail.us>, Alberto Lepe <dev@alepe.com>, www-style list <www-style@w3.org>
Message-Id: <8EEBDD22-DE6B-4821-875A-0B332C237BAB@gmail.com>
To: "Tab Atkins Jr." <jackalmage@gmail.com>
Fine with me.

On May 18, 2010, at 10:47 AM, Tab Atkins Jr. wrote:

> On Fri, May 14, 2010 at 9:07 PM, Tab Atkins Jr. <jackalmage@gmail.com> wrote:
>> I submitted my very first patch to Webkit today, to add this syntax:
>> https://bugs.webkit.org/show_bug.cgi?id=39140 .
>> I'm still ambivalent about adding this to Level 3, but given the
>> triviality of the patch, and the presumed triviality of similar
>> changes to the other browsers, I highly doubt it would slow down the
>> progression of Level 3.  Lachy has expressed a desire to get Opera to
>> support it, and Sylvain has said that he'll at least support a
>> proposal.
>> The spec change is similarly trivial.  Replace the second paragraph
>> under "RGBA Color Values", which starts with "Unlike RGB values...",
>> with "The format of an RGBA value in hexadecimal notation is a #
>> immediately followed by either four or eight hexadecimal characters.
>> The four-digit RGB notation (#rgba) is converted into eight-digit form
>> (#rrggbbaa) by replicating digits, not by adding zeros.  The last two
>> digits are divided by 256 to form an <alphavalue>."  Then add the
>> obvious examples to the two example sections.
>> (I actually need to go check and see what exactly we do with the
>> mapping.  0x80 maps to .5, but 0xFF maps to 1.0.  Something seems
>> slightly amiss here...)
> So, my patch is currently denied based on 4/8 hexit colors not being
> in any draft.  Can we just go ahead and start Colors level 4?  We can
> put in #rgba notation, along with color-correction and the color-space
> stuff we removed during TPAC.  They need somewhere to live anyway.
> ~TJ

Received on Tuesday, 18 May 2010 18:18:01 UTC

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