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From Jeremias Maerki <...@jeremias-maerki.ch>
Subject Re: Thinking about color
Date Wed, 16 Jun 2010 06:52:21 GMT
Yes, I could use feedback from people with advanced knowledge of color
issues. I'm still learning and only trying to become a color expert.

As for your comment, I can't tell why lightbrown should cause trouble.
It's just a simple named sRGB color which is mapped to predefined R, G
and B values. FOP actually implements SVG's list of colors, not just the
ones from CSS: http://www.w3.org/TR/SVG11/types.html#ColorKeywords

On 15.06.2010 20:26:00 Eric Douglas wrote:
> Maybe I'm not quite sure what you're getting at, maybe it takes a color
> expert?  All I know is I tried using names for those colors and ran into
> a couple of issues.
> For one it didn't seem to like the brown, but of course I wanted to make
> it more dynamic to compute colors for the possibility of many pie
> pieces, but here's what I started with.
> 
>           <xsl:when test="$i=1">orangered</xsl:when>
>           <xsl:when test="$i=2">cornflowerblue</xsl:when>
>           <xsl:when test="$i=3">yellow</xsl:when>
>           <xsl:when test="$i=4">lightgreen</xsl:when>
>           <xsl:when test="$i=5">blueviolet</xsl:when>
>           <xsl:when test="$i=6">chartreuse</xsl:when>
>           <xsl:when test="$i=7">deepskyblue</xsl:when>
> ** for some reason light brown causes extreme delay on output create
>           <xsl:when test="$i=8">lightbrown</xsl:when>
>           <xsl:when test="$i=9">aquamarine</xsl:when>
>           <xsl:when test="$i=10">pink</xsl:when>
>           <xsl:when test="$i=11">cornflowerblue</xsl:when>
>           <xsl:when test="$i=12">lightyellow</xsl:when>
>           <xsl:when test="$i=13">burlywood</xsl:when>
>           <xsl:when test="$i=14">cornflowerblue</xsl:when>
>           <xsl:when test="$i=15">cornsilk</xsl:when>
>           <xsl:otherwise>black</xsl:otherwise> 
> 
> -----Original Message-----
> From: Jeremias Maerki [mailto:dev@jeremias-maerki.ch] 
> Sent: Tuesday, June 15, 2010 2:20 PM
> To: general@xmlgraphics.apache.org
> Subject: Re: Thinking about color
> 
> Thanks, Eric. Actually, I'm talking about more than just sRGB which is
> already sufficiently implemented in both Batik and FOP. What I'm trying
> to cover are device-specific colors, CIE-family colors and foremost
> named colors (spot colors).
> 
> On 15.06.2010 20:12:57 Eric Douglas wrote:
> > Color works fine for me in FOP.
> > I looked up default color names on the web and found these weird 
> > things, from cornflowerblue to burlywood.
> > I just use a value of RGB(#,#,#) on the fill attribute in the svg
> tags.
> > Of course being a programmer I prefer to use the numbers to calculate 
> > the colors rather than putting in goofy names.
> > I copied some SVG code for a pie chart from some web page and replaced
> 
> > the color section (attempting to make the color of each slice 
> > distinguishable from the next) with:
> >           <xsl:when test="$i=1">rgb(255,127,127)</xsl:when>
> >           <xsl:when test="$i=2">rgb(127,127,255)</xsl:when>
> >           <xsl:when test="$i=3">rgb(255,255,127)</xsl:when>
> >           <xsl:when test="$i=4">rgb(191,64,255)</xsl:when>
> >           <xsl:when test="$i=5">rgb(127,255,127)</xsl:when>
> >           <xsl:when test="$i=6">rgb(255,191,64)</xsl:when>
> >           <xsl:when test="$i=7">rgb(223,95,191)</xsl:when>
> >           <xsl:when test="$i=8">rgb(127,191,191)</xsl:when>
> >           <xsl:when test="$i=9">rgb(255,223,32)</xsl:when>
> >           <xsl:when test="$i=10">rgb(159,95,255)</xsl:when>
> >           <xsl:when test="$i=11">rgb(191,255,127)</xsl:when>
> >           <xsl:when test="$i=12">rgb(255,223,95)</xsl:when>
> >           <xsl:when test="$i=13">rgb(239,111,223)</xsl:when>
> >           <xsl:when test="$i=14">rgb(127,159,223)</xsl:when>
> >           <xsl:when test="$i=15">rgb(255,239,79)</xsl:when>
> >           <xsl:otherwise><xsl:value-of 
> > select="concat('rgb(',string(255
> > - (($i - 15) * 32)),',',string(255 - (($i - 15) * 32)),',',string(255 
> > - (($i - 15) * 32)),')')"/></xsl:otherwise>
> > 
> > -----Original Message-----
> > From: Jeremias Maerki [mailto:dev@jeremias-maerki.ch]
> > Sent: Tuesday, June 15, 2010 2:02 PM
> > To: batik-dev@xmlgraphics.apache.org; fop-dev@xmlgraphics.apache.org; 
> > general@xmlgraphics.apache.org
> > Subject: Thinking about color
> > 
> > Folks,
> > if you haven't seen it, yet, I've started to write down some notes on 
> > handling color on the Wiki which applies to both Batik and FOP:
> > http://wiki.apache.org/xmlgraphics/ColorHandling
> > 
> > This is mostly triggered by my wanting to add support for named colors
> 
> > in SVG and FO. I'm grateful for feedback from anyone who knows a few 
> > things about colors. I'm especially hoping for Thomas to chime in 
> > since her works for a color-phile company. ;-)
> > 
> > Discussion on general@ please.
> > 
> > Thanks,
> > Jeremias Maerki
> > 
> 
> 
> 
> Jeremias Maerki
> 
> 
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> 
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> 




Jeremias Maerki


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