DFXP LC Comments - Issue 15 Response; Chris Lilley

Dear Chris,
	
Thank you for your comments, [1], on the DFXP Last Call Working Draft
[2].  The TT WG has concluded its review of your comments and has
agreed upon the following responses.

If you require any further follow-up, then please do so no later than
September 1, and please forward your follow-up to <public-tt@w3.org>.

Regards,
Glenn Adams
Chair, Timed Text Working Group

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Citations:

[1] http://lists.w3.org/Archives/Public/public-tt/2005May/0000.html
[2] http://www.w3.org/TR/2005/WD-ttaf1-dfxp-20050321/

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Comment - Issue #15 [1]; 27 May 2005 16:01:28 +0200

a) what is the color space for the RGB values (I expect it is sRGB, but
the spec does not say so)

Response:

The intention is to use sRGB.  We will ensure the specification
normatively reflects this intent.

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Comment - Issue #15 [1]; 27 May 2005 16:01:28 +0200

b) Do rgba values represent premultiplied values or not?

Response:

The RGB components of an RGBA tuple expressed by the rgba() function
are NOT premultiplied by alpha; we believe this matches the
interpretation used by CSS3 Color Module. We will ensure the
specification normatively reflects this intent.

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Comment - Issue #15 [1]; 27 May 2005 16:01:28 +0200

c) Is the opacity channel linear, or not?

Response:

The intent is to be linear. We will ensure the specification
normatively reflects this intent.

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Comment - Issue #15 [1]; 27 May 2005 16:01:28 +0200

d) What color space is used for compositing of two rgba values?

Response:

The intent is that the input and output color spaces from the
compositing function are all sRGB. We will ensure the specification
normatively reflects this intent.

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Comment - Issue #15 [1]; 27 May 2005 16:01:28 +0200

Also, in section 8.3.12 <namedColor>
the same comment applies (I assume the answers are the same).

Response:

The intent is to use sRGBA. We will ensure the specification
normatively reflects this intent.

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Received on Friday, 12 August 2005 20:25:10 UTC