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Subject: Fwd: Re: [office] Direction of radial gradients


Pinging again about this.

There's an inconsistency between OpenOffice.org and SVG, so we need to clarify
in the spec which way is intended. I guess the first step would be for someone from
Sun like Michael to check with the graphics team what they think about it?

----------  Forwarded Message  ----------

Subject: Re: [office] Direction of radial gradients
Date: Monday 07 July 2008
From: David Faure <faure@kde.org>
To: office@lists.oasis-open.org

Any input on this issue, especially from OpenOffice developers?

There is no actual proposal in this email because before we can make a proposal
we need to understand what the current situation is, and what it's supposed to be :-)

On Friday 13 June 2008, David Faure wrote:
> The spec is unclear about the direction of radial gradients:
> 
> > 18.354 draw:start-color 
> > The draw:start-color attributes specifies the start value for the <draw:gradient> element, which interpolates between the value 
> > of this attribute and draw:end-color. 
> > The draw:start-color attribute may be used with the following element: <draw:gradient> 15.17.1 
> 
> And similar for end-color, but it doesn't say which color is the inner color and which is the
> outer color for a radial gradient.
> 
> Testing with OpenOffice: creating a radial gradient gives:
> 
> <draw:gradient draw:name="Radial_20_red_2f_yellow" draw:display-name="Radial
> red/yellow" draw:style="radial" draw:cx="50%" draw:cy="50%"
> draw:start-color="#ff3333" draw:end-color="#e6ff00"
> draw:start-intensity="100%" draw:end-intensity="100%" draw:border="0%"/>
> 
> start-color is red and end-color is yellow.
> 
> At the moment we have the following situation (example image attached):
> KOffice (Karbon): start-color is the inner color, end-color the outer
> OpenOffice: start-color is the outer, end-color the inner
> 
> In SVG the first color stop is the most inner color and the last stop the
> most outer color.
> 
> The OpenDocument specification needs to be clearer about how the colors 
> need to be handled, especially since OpenOffice and SVG have a different
> view on the question.
> 
> In 1.1 the specification also said:
> > 14.14.1 Colors is the following:
> > The gradient interpolates between a start color and an end color, which are
> > specified using the attributes draw:start-color and draw:end-color.
> but I don't see this in 1.2-draft7 ?
> 
> The specification could say something like: "If the gradient is radial, ... 
> then start-color is the inner color and end-color is the outer color",
> if we decide to follow the OpenOffice behavior.
> 
> -- 
> David Faure, faure@kde.org, sponsored by Trolltech to work on KDE,
> Konqueror (http://www.konqueror.org), and KOffice (http://www.koffice.org).
> 



-- 
David Faure, faure@kde.org, sponsored by Trolltech to work on KDE,
Konqueror (http://www.konqueror.org), and KOffice (http://www.koffice.org).

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-------------------------------------------------------

-- 
David Faure, faure@kde.org, sponsored by Qt Software @ Nokia to work on KDE,
Konqueror (http://www.konqueror.org), and KOffice (http://www.koffice.org).


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