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ghc-colour-devel-2.3.1-1.fc14.i686.rpm

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>Data.Colour.RGBSpace</TITLE
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>colour-2.3.1: A model for human colour/color perception</TD
><TD CLASS="topbut"
><A HREF="src/Data-Colour-RGBSpace.html"
>Source code</A
></TD
><TD CLASS="topbut"
><A HREF="index.html"
>Contents</A
></TD
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><TD
><FONT SIZE="6"
>Data.Colour.RGBSpace</FONT
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD
><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="section4"
><B
>Contents</B
></TD
></TR
><TR
><TD
><DL
><DT
><A HREF="#1"
>RGB Tuple
</A
></DT
><DT
><A HREF="#2"
>RGB Gamut
</A
></DT
><DT
><A HREF="#3"
>RGB Space
</A
></DT
></DL
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="section1"
>Description</TD
></TR
><TR
><TD CLASS="doc"
>An <TT
><A HREF="Data-Colour-RGBSpace.html#t%3ARGBSpace"
>RGBSpace</A
></TT
> is characterized by <TT
><A HREF="Data-Colour-CIE.html#t%3AChromaticity"
>Chromaticity</A
></TT
> for red, green, and
 blue, the <TT
><A HREF="Data-Colour-CIE.html#t%3AChromaticity"
>Chromaticity</A
></TT
> of the white point, and it's
 <TT
><A HREF="Data-Colour-RGBSpace.html#t%3ATransferFunction"
>TransferFunction</A
></TT
>.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="section1"
>Synopsis</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="body"
><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="decl"
><SPAN CLASS="keyword"
>data</SPAN
>  <A HREF="#t%3AColour"
>Colour</A
> a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><SPAN CLASS="keyword"
>data</SPAN
>  <A HREF="#t%3ARGB"
>RGB</A
> a = <A HREF="#v%3ARGB"
>RGB</A
> {<TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="recfield"
><A HREF="#v%3AchannelRed"
>channelRed</A
> :: !a</TD
></TR
><TR
><TD CLASS="recfield"
><A HREF="#v%3AchannelGreen"
>channelGreen</A
> :: !a</TD
></TR
><TR
><TD CLASS="recfield"
><A HREF="#v%3AchannelBlue"
>channelBlue</A
> :: !a</TD
></TR
></TABLE
>}</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AuncurryRGB"
>uncurryRGB</A
> ::  (a -&gt; a -&gt; a -&gt; b) -&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ARGB"
>RGB</A
> a -&gt; b</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AcurryRGB"
>curryRGB</A
> ::  (<A HREF="Data-Colour-RGBSpace.html#t%3ARGB"
>RGB</A
> a -&gt; b) -&gt; a -&gt; a -&gt; a -&gt; b</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><SPAN CLASS="keyword"
>data</SPAN
>  <A HREF="#t%3ARGBGamut"
>RGBGamut</A
> </TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AmkRGBGamut"
>mkRGBGamut</A
> :: <A HREF="Data-Colour-RGBSpace.html#t%3ARGB"
>RGB</A
> (<A HREF="Data-Colour-CIE.html#t%3AChromaticity"
>Chromaticity</A
> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3ARational"
>Rational</A
>) -&gt; <A HREF="Data-Colour-CIE.html#t%3AChromaticity"
>Chromaticity</A
> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3ARational"
>Rational</A
> -&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ARGBGamut"
>RGBGamut</A
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3Aprimaries"
>primaries</A
> :: <A HREF="Data-Colour-RGBSpace.html#t%3ARGBGamut"
>RGBGamut</A
> -&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ARGB"
>RGB</A
> (<A HREF="Data-Colour-CIE.html#t%3AChromaticity"
>Chromaticity</A
> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3ARational"
>Rational</A
>)</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AwhitePoint"
>whitePoint</A
> :: <A HREF="Data-Colour-RGBSpace.html#t%3ARGBGamut"
>RGBGamut</A
> -&gt; <A HREF="Data-Colour-CIE.html#t%3AChromaticity"
>Chromaticity</A
> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3ARational"
>Rational</A
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AinGamut"
>inGamut</A
> :: (<A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Ord.html#t%3AOrd"
>Ord</A
> a, <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3AFractional"
>Fractional</A
> a) =&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ARGBGamut"
>RGBGamut</A
> -&gt; <A HREF="Data-Colour-RGBSpace.html#t%3AColour"
>Colour</A
> a -&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Bool.html#t%3ABool"
>Bool</A
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><SPAN CLASS="keyword"
>data</SPAN
>  <A HREF="#t%3ATransferFunction"
>TransferFunction</A
> a = <A HREF="#v%3ATransferFunction"
>TransferFunction</A
> {<TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="recfield"
><A HREF="#v%3Atransfer"
>transfer</A
> :: a -&gt; a</TD
></TR
><TR
><TD CLASS="recfield"
><A HREF="#v%3AtransferInverse"
>transferInverse</A
> :: a -&gt; a</TD
></TR
><TR
><TD CLASS="recfield"
><A HREF="#v%3AtransferGamma"
>transferGamma</A
> :: a</TD
></TR
></TABLE
>}</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AlinearTransferFunction"
>linearTransferFunction</A
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3ANum"
>Num</A
> a =&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ATransferFunction"
>TransferFunction</A
> a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3ApowerTransferFunction"
>powerTransferFunction</A
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3AFloating"
>Floating</A
> a =&gt; a -&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ATransferFunction"
>TransferFunction</A
> a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AinverseTransferFunction"
>inverseTransferFunction</A
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3AFractional"
>Fractional</A
> a =&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ATransferFunction"
>TransferFunction</A
> a -&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ATransferFunction"
>TransferFunction</A
> a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><SPAN CLASS="keyword"
>data</SPAN
>  <A HREF="#t%3ARGBSpace"
>RGBSpace</A
> a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AmkRGBSpace"
>mkRGBSpace</A
> ::  <A HREF="Data-Colour-RGBSpace.html#t%3ARGBGamut"
>RGBGamut</A
> -&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ATransferFunction"
>TransferFunction</A
> a -&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ARGBSpace"
>RGBSpace</A
> a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3Agamut"
>gamut</A
> :: <A HREF="Data-Colour-RGBSpace.html#t%3ARGBSpace"
>RGBSpace</A
> a -&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ARGBGamut"
>RGBGamut</A
></TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AtransferFunction"
>transferFunction</A
> :: <A HREF="Data-Colour-RGBSpace.html#t%3ARGBSpace"
>RGBSpace</A
> a -&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ATransferFunction"
>TransferFunction</A
> a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AlinearRGBSpace"
>linearRGBSpace</A
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3ANum"
>Num</A
> a =&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ARGBGamut"
>RGBGamut</A
> -&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ARGBSpace"
>RGBSpace</A
> a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3ArgbUsingSpace"
>rgbUsingSpace</A
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3AFractional"
>Fractional</A
> a =&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ARGBSpace"
>RGBSpace</A
> a -&gt; a -&gt; a -&gt; a -&gt; <A HREF="Data-Colour-RGBSpace.html#t%3AColour"
>Colour</A
> a</TD
></TR
><TR
><TD CLASS="s8"
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="#v%3AtoRGBUsingSpace"
>toRGBUsingSpace</A
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3AFractional"
>Fractional</A
> a =&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ARGBSpace"
>RGBSpace</A
> a -&gt; <A HREF="Data-Colour-RGBSpace.html#t%3AColour"
>Colour</A
> a -&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ARGB"
>RGB</A
> a</TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="section1"
>Documentation</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><SPAN CLASS="keyword"
>data</SPAN
>  <A NAME="t:Colour"
><A NAME="t%3AColour"
></A
></A
><B
>Colour</B
> a </TD
><TD CLASS="declbut"
><A HREF="src/Data-Colour-Internal.html#Colour"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="body"
><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="ndoc"
><P
>This type represents the human preception of colour.
 The <TT
>a</TT
> parameter is a numeric type used internally for the
 representation.
</P
><P
>The <TT
><A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Monoid.html#t%3AMonoid"
>Monoid</A
></TT
> instance allows one to add colours, but beware that adding
 colours can take you out of gamut.  Consider using <TT
><A HREF="Data-Colour.html#v%3Ablend"
>blend</A
></TT
> whenever
 possible.
</P
></TD
></TR
><TR
><TD CLASS="section4"
><IMG SRC="minus.gif" CLASS="coll" ONCLICK="toggle(this,'i:Colour')" ALT="show/hide"
> Instances</TD
></TR
><TR
><TD CLASS="body"
><DIV ID="i:Colour" STYLE="display:block;"
><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0"
><TR
><TD CLASS="decl"
><A HREF="Data-Colour.html#t%3AColourOps"
>ColourOps</A
> <A HREF="Data-Colour-RGBSpace.html#t%3AColour"
>Colour</A
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="Data-Colour.html#t%3AAffineSpace"
>AffineSpace</A
> <A HREF="Data-Colour-RGBSpace.html#t%3AColour"
>Colour</A
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Eq.html#t%3AEq"
>Eq</A
> a =&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Eq.html#t%3AEq"
>Eq</A
> (<A HREF="Data-Colour-RGBSpace.html#t%3AColour"
>Colour</A
> a)</TD
></TR
><TR
><TD CLASS="decl"
>(<A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3AFractional"
>Fractional</A
> a, <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Read.html#t%3ARead"
>Read</A
> a) =&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Read.html#t%3ARead"
>Read</A
> (<A HREF="Data-Colour-RGBSpace.html#t%3AColour"
>Colour</A
> a)</TD
></TR
><TR
><TD CLASS="decl"
><A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3AFractional"
>Fractional</A
> a =&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow"
>Show</A
> (<A HREF="Data-Colour-RGBSpace.html#t%3AColour"
>Colour</A
> a)</TD
></TR
><TR
><TD CLASS="decl"
><A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3ANum"
>Num</A
> a =&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Monoid.html#t%3AMonoid"
>Monoid</A
> (<A HREF="Data-Colour-RGBSpace.html#t%3AColour"
>Colour</A
> a)</TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="section1"
><A NAME="1"
><A NAME="1"
>RGB Tuple
</A
></A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><SPAN CLASS="keyword"
>data</SPAN
>  <A NAME="t:RGB"
><A NAME="t%3ARGB"
></A
></A
><B
>RGB</B
> a </TD
><TD CLASS="declbut"
><A HREF="src/Data-Colour-RGB.html#RGB"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="body"
><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="ndoc"
>An RGB triple for an unspecified colour space.
</TD
></TR
><TR
><TD CLASS="section4"
>Constructors</TD
></TR
><TR
><TD CLASS="body"
><TABLE CLASS="vanilla" CELLSPACING="5" CELLPADDING="0"
><TR
><TD CLASS="arg"
><A NAME="v:RGB"
><A NAME="v%3ARGB"
></A
></A
><B
>RGB</B
></TD
><TD CLASS="rdoc"
></TD
></TR
><TR
><TD CLASS="body" COLSPAN="2"
><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0"
><TR
><TD CLASS="arg"
><A NAME="v:channelRed"
><A NAME="v%3AchannelRed"
></A
></A
><B
>channelRed</B
> :: !a</TD
><TD CLASS="rdoc"
></TD
></TR
><TR
><TD CLASS="arg"
><A NAME="v:channelGreen"
><A NAME="v%3AchannelGreen"
></A
></A
><B
>channelGreen</B
> :: !a</TD
><TD CLASS="rdoc"
></TD
></TR
><TR
><TD CLASS="arg"
><A NAME="v:channelBlue"
><A NAME="v%3AchannelBlue"
></A
></A
><B
>channelBlue</B
> :: !a</TD
><TD CLASS="rdoc"
></TD
></TR
></TABLE
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="section4"
><IMG SRC="minus.gif" CLASS="coll" ONCLICK="toggle(this,'i:RGB')" ALT="show/hide"
> Instances</TD
></TR
><TR
><TD CLASS="body"
><DIV ID="i:RGB" STYLE="display:block;"
><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0"
><TR
><TD CLASS="decl"
><A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Control-Monad.html#t%3AFunctor"
>Functor</A
> <A HREF="Data-Colour-RGBSpace.html#t%3ARGB"
>RGB</A
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Control-Applicative.html#t%3AApplicative"
>Applicative</A
> <A HREF="Data-Colour-RGBSpace.html#t%3ARGB"
>RGB</A
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Eq.html#t%3AEq"
>Eq</A
> a =&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Eq.html#t%3AEq"
>Eq</A
> (<A HREF="Data-Colour-RGBSpace.html#t%3ARGB"
>RGB</A
> a)</TD
></TR
><TR
><TD CLASS="decl"
><A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Read.html#t%3ARead"
>Read</A
> a =&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Read.html#t%3ARead"
>Read</A
> (<A HREF="Data-Colour-RGBSpace.html#t%3ARGB"
>RGB</A
> a)</TD
></TR
><TR
><TD CLASS="decl"
><A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow"
>Show</A
> a =&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow"
>Show</A
> (<A HREF="Data-Colour-RGBSpace.html#t%3ARGB"
>RGB</A
> a)</TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:uncurryRGB"
><A NAME="v%3AuncurryRGB"
></A
></A
><B
>uncurryRGB</B
> ::  (a -&gt; a -&gt; a -&gt; b) -&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ARGB"
>RGB</A
> a -&gt; b</TD
><TD CLASS="declbut"
><A HREF="src/Data-Colour-RGB.html#uncurryRGB"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>Uncurries a function expecting three r, g, b parameters.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:curryRGB"
><A NAME="v%3AcurryRGB"
></A
></A
><B
>curryRGB</B
> ::  (<A HREF="Data-Colour-RGBSpace.html#t%3ARGB"
>RGB</A
> a -&gt; b) -&gt; a -&gt; a -&gt; a -&gt; b</TD
><TD CLASS="declbut"
><A HREF="src/Data-Colour-RGB.html#curryRGB"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>Curries a function expecting one RGB parameter.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="section1"
><A NAME="2"
><A NAME="2"
>RGB Gamut
</A
></A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><SPAN CLASS="keyword"
>data</SPAN
>  <A NAME="t:RGBGamut"
><A NAME="t%3ARGBGamut"
></A
></A
><B
>RGBGamut</B
>  </TD
><TD CLASS="declbut"
><A HREF="src/Data-Colour-RGB.html#RGBGamut"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="body"
><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="ndoc"
>An <TT
><A HREF="Data-Colour-RGBSpace.html#t%3ARGBGamut"
>RGBGamut</A
></TT
> is a 3-D colour &#x201c;cube&#x201d; that contains all the
 colours that can be displayed by a RGB device.
 The &#x201c;cube&#x201d; is normalized so that white has
 Data.Colour.CIE.luminance 1.
</TD
></TR
><TR
><TD CLASS="section4"
><IMG SRC="minus.gif" CLASS="coll" ONCLICK="toggle(this,'i:RGBGamut')" ALT="show/hide"
> Instances</TD
></TR
><TR
><TD CLASS="body"
><DIV ID="i:RGBGamut" STYLE="display:block;"
><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0"
><TR
><TD CLASS="decl"
><A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Eq.html#t%3AEq"
>Eq</A
> <A HREF="Data-Colour-RGBSpace.html#t%3ARGBGamut"
>RGBGamut</A
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Read.html#t%3ARead"
>Read</A
> <A HREF="Data-Colour-RGBSpace.html#t%3ARGBGamut"
>RGBGamut</A
></TD
></TR
><TR
><TD CLASS="decl"
><A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow"
>Show</A
> <A HREF="Data-Colour-RGBSpace.html#t%3ARGBGamut"
>RGBGamut</A
></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:mkRGBGamut"
><A NAME="v%3AmkRGBGamut"
></A
></A
><B
>mkRGBGamut</B
></TD
><TD CLASS="declbut"
><A HREF="src/Data-Colour-RGB.html#mkRGBGamut"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="body"
><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="arg"
>:: <A HREF="Data-Colour-RGBSpace.html#t%3ARGB"
>RGB</A
> (<A HREF="Data-Colour-CIE.html#t%3AChromaticity"
>Chromaticity</A
> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3ARational"
>Rational</A
>)</TD
><TD CLASS="rdoc"
>The three primaries
</TD
></TR
><TR
><TD CLASS="arg"
>-&gt; <A HREF="Data-Colour-CIE.html#t%3AChromaticity"
>Chromaticity</A
> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3ARational"
>Rational</A
></TD
><TD CLASS="rdoc"
>The white point
</TD
></TR
><TR
><TD CLASS="arg"
>-&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ARGBGamut"
>RGBGamut</A
></TD
><TD CLASS="rdoc"
></TD
></TR
><TR
><TD CLASS="ndoc" COLSPAN="2"
>An RGB gamut is specified by three primary colours (red, green, and 
 blue) and a white point (often Data.Colour.CIE.Illuminant.d65).
</TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:primaries"
><A NAME="v%3Aprimaries"
></A
></A
><B
>primaries</B
> :: <A HREF="Data-Colour-RGBSpace.html#t%3ARGBGamut"
>RGBGamut</A
> -&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ARGB"
>RGB</A
> (<A HREF="Data-Colour-CIE.html#t%3AChromaticity"
>Chromaticity</A
> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3ARational"
>Rational</A
>)</TD
><TD CLASS="declbut"
><A HREF="src/Data-Colour-RGB.html#primaries"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:whitePoint"
><A NAME="v%3AwhitePoint"
></A
></A
><B
>whitePoint</B
> :: <A HREF="Data-Colour-RGBSpace.html#t%3ARGBGamut"
>RGBGamut</A
> -&gt; <A HREF="Data-Colour-CIE.html#t%3AChromaticity"
>Chromaticity</A
> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3ARational"
>Rational</A
></TD
><TD CLASS="declbut"
><A HREF="src/Data-Colour-RGB.html#whitePoint"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:inGamut"
><A NAME="v%3AinGamut"
></A
></A
><B
>inGamut</B
> :: (<A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Ord.html#t%3AOrd"
>Ord</A
> a, <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3AFractional"
>Fractional</A
> a) =&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ARGBGamut"
>RGBGamut</A
> -&gt; <A HREF="Data-Colour-RGBSpace.html#t%3AColour"
>Colour</A
> a -&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Bool.html#t%3ABool"
>Bool</A
></TD
><TD CLASS="declbut"
><A HREF="src/Data-Colour-RGBSpace.html#inGamut"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>Returns <TT
><A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Bool.html#v%3ATrue"
>True</A
></TT
> if the given colour lies inside the given gamut.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="section1"
><A NAME="3"
><A NAME="3"
>RGB Space
</A
></A
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><SPAN CLASS="keyword"
>data</SPAN
>  <A NAME="t:TransferFunction"
><A NAME="t%3ATransferFunction"
></A
></A
><B
>TransferFunction</B
> a </TD
><TD CLASS="declbut"
><A HREF="src/Data-Colour-RGBSpace.html#TransferFunction"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="body"
><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="ndoc"
><P
>A <TT
><A HREF="Data-Colour-RGBSpace.html#v%3Atransfer"
>transfer</A
></TT
> function is a function that typically translates linear
 colour space coordinates into non-linear coordinates.
 The <TT
><A HREF="Data-Colour-RGBSpace.html#v%3AtransferInverse"
>transferInverse</A
></TT
> function reverses this by translating non-linear
 colour space coordinates into linear coordinates.
 It is required that
</P
><PRE
> transfer . transferInverse === id === transferInverse . inverse
</PRE
><P
>(or that this law holds up to floating point rounding errors).
</P
><P
>We also require that <TT
><A HREF="Data-Colour-RGBSpace.html#v%3Atransfer"
>transfer</A
></TT
> is approximately <TT
>(**transferGamma)</TT
>
 (and hence <TT
><A HREF="Data-Colour-RGBSpace.html#v%3AtransferInverse"
>transferInverse</A
></TT
> is approximately
 <TT
>(**(recip transferGamma))</TT
>).
 The value <TT
><A HREF="Data-Colour-RGBSpace.html#v%3AtransferGamma"
>transferGamma</A
></TT
> is for informational purposes only, so there
 is no bound on how good this approximation needs to be.
</P
></TD
></TR
><TR
><TD CLASS="section4"
>Constructors</TD
></TR
><TR
><TD CLASS="body"
><TABLE CLASS="vanilla" CELLSPACING="5" CELLPADDING="0"
><TR
><TD CLASS="arg"
><A NAME="v:TransferFunction"
><A NAME="v%3ATransferFunction"
></A
></A
><B
>TransferFunction</B
></TD
><TD CLASS="rdoc"
></TD
></TR
><TR
><TD CLASS="body" COLSPAN="2"
><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0"
><TR
><TD CLASS="arg"
><A NAME="v:transfer"
><A NAME="v%3Atransfer"
></A
></A
><B
>transfer</B
> :: a -&gt; a</TD
><TD CLASS="rdoc"
></TD
></TR
><TR
><TD CLASS="arg"
><A NAME="v:transferInverse"
><A NAME="v%3AtransferInverse"
></A
></A
><B
>transferInverse</B
> :: a -&gt; a</TD
><TD CLASS="rdoc"
></TD
></TR
><TR
><TD CLASS="arg"
><A NAME="v:transferGamma"
><A NAME="v%3AtransferGamma"
></A
></A
><B
>transferGamma</B
> :: a</TD
><TD CLASS="rdoc"
></TD
></TR
></TABLE
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="section4"
><IMG SRC="minus.gif" CLASS="coll" ONCLICK="toggle(this,'i:TransferFunction')" ALT="show/hide"
> Instances</TD
></TR
><TR
><TD CLASS="body"
><DIV ID="i:TransferFunction" STYLE="display:block;"
><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0"
><TR
><TD CLASS="decl"
><A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3ANum"
>Num</A
> a =&gt; <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Monoid.html#t%3AMonoid"
>Monoid</A
> (<A HREF="Data-Colour-RGBSpace.html#t%3ATransferFunction"
>TransferFunction</A
> a)</TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:linearTransferFunction"
><A NAME="v%3AlinearTransferFunction"
></A
></A
><B
>linearTransferFunction</B
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3ANum"
>Num</A
> a =&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ATransferFunction"
>TransferFunction</A
> a</TD
><TD CLASS="declbut"
><A HREF="src/Data-Colour-RGBSpace.html#linearTransferFunction"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>This is the identity <TT
><A HREF="Data-Colour-RGBSpace.html#t%3ATransferFunction"
>TransferFunction</A
></TT
>.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:powerTransferFunction"
><A NAME="v%3ApowerTransferFunction"
></A
></A
><B
>powerTransferFunction</B
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3AFloating"
>Floating</A
> a =&gt; a -&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ATransferFunction"
>TransferFunction</A
> a</TD
><TD CLASS="declbut"
><A HREF="src/Data-Colour-RGBSpace.html#powerTransferFunction"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>This is the <TT
>(**gamma)</TT
> <TT
><A HREF="Data-Colour-RGBSpace.html#t%3ATransferFunction"
>TransferFunction</A
></TT
>.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:inverseTransferFunction"
><A NAME="v%3AinverseTransferFunction"
></A
></A
><B
>inverseTransferFunction</B
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3AFractional"
>Fractional</A
> a =&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ATransferFunction"
>TransferFunction</A
> a -&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ATransferFunction"
>TransferFunction</A
> a</TD
><TD CLASS="declbut"
><A HREF="src/Data-Colour-RGBSpace.html#inverseTransferFunction"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>This reverses a <TT
><A HREF="Data-Colour-RGBSpace.html#t%3ATransferFunction"
>TransferFunction</A
></TT
>.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><SPAN CLASS="keyword"
>data</SPAN
>  <A NAME="t:RGBSpace"
><A NAME="t%3ARGBSpace"
></A
></A
><B
>RGBSpace</B
> a </TD
><TD CLASS="declbut"
><A HREF="src/Data-Colour-RGBSpace.html#RGBSpace"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="body"
><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0"
><TR
><TD CLASS="ndoc"
>An <TT
><A HREF="Data-Colour-RGBSpace.html#t%3ARGBSpace"
>RGBSpace</A
></TT
> is a colour coordinate system for colours laying
 <TT
><A HREF="Data-Colour-RGBSpace.html#v%3AinGamut"
>inGamut</A
></TT
> of <TT
><A HREF="Data-Colour-RGBSpace.html#v%3Agamut"
>gamut</A
></TT
>.
 Linear coordinates are passed through a <TT
><A HREF="Data-Colour-RGBSpace.html#v%3AtransferFunction"
>transferFunction</A
></TT
> to
 produce non-linear <TT
><A HREF="Data-Colour-RGBSpace.html#t%3ARGB"
>RGB</A
></TT
> values.
</TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:mkRGBSpace"
><A NAME="v%3AmkRGBSpace"
></A
></A
><B
>mkRGBSpace</B
> ::  <A HREF="Data-Colour-RGBSpace.html#t%3ARGBGamut"
>RGBGamut</A
> -&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ATransferFunction"
>TransferFunction</A
> a -&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ARGBSpace"
>RGBSpace</A
> a</TD
><TD CLASS="declbut"
><A HREF="src/Data-Colour-RGBSpace.html#mkRGBSpace"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>An RGBSpace is specified by an <TT
><A HREF="Data-Colour-RGBSpace.html#t%3ARGBGamut"
>RGBGamut</A
></TT
> and a <TT
><A HREF="Data-Colour-RGBSpace.html#t%3ATransferFunction"
>TransferFunction</A
></TT
>.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:gamut"
><A NAME="v%3Agamut"
></A
></A
><B
>gamut</B
> :: <A HREF="Data-Colour-RGBSpace.html#t%3ARGBSpace"
>RGBSpace</A
> a -&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ARGBGamut"
>RGBGamut</A
></TD
><TD CLASS="declbut"
><A HREF="src/Data-Colour-RGBSpace.html#gamut"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:transferFunction"
><A NAME="v%3AtransferFunction"
></A
></A
><B
>transferFunction</B
> :: <A HREF="Data-Colour-RGBSpace.html#t%3ARGBSpace"
>RGBSpace</A
> a -&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ATransferFunction"
>TransferFunction</A
> a</TD
><TD CLASS="declbut"
><A HREF="src/Data-Colour-RGBSpace.html#transferFunction"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:linearRGBSpace"
><A NAME="v%3AlinearRGBSpace"
></A
></A
><B
>linearRGBSpace</B
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3ANum"
>Num</A
> a =&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ARGBGamut"
>RGBGamut</A
> -&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ARGBSpace"
>RGBSpace</A
> a</TD
><TD CLASS="declbut"
><A HREF="src/Data-Colour-RGBSpace.html#linearRGBSpace"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>Produce a linear colour space from an <TT
><A HREF="Data-Colour-RGBSpace.html#t%3ARGBGamut"
>RGBGamut</A
></TT
>.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:rgbUsingSpace"
><A NAME="v%3ArgbUsingSpace"
></A
></A
><B
>rgbUsingSpace</B
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3AFractional"
>Fractional</A
> a =&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ARGBSpace"
>RGBSpace</A
> a -&gt; a -&gt; a -&gt; a -&gt; <A HREF="Data-Colour-RGBSpace.html#t%3AColour"
>Colour</A
> a</TD
><TD CLASS="declbut"
><A HREF="src/Data-Colour-RGBSpace.html#rgbUsingSpace"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>Create a <TT
><A HREF="Data-Colour-RGBSpace.html#t%3AColour"
>Colour</A
></TT
> from red, green, and blue coordinates given in a
 general <TT
><A HREF="Data-Colour-RGBSpace.html#t%3ARGBSpace"
>RGBSpace</A
></TT
>.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="topdecl"
><TABLE CLASS="declbar"
><TR
><TD CLASS="declname"
><A NAME="v:toRGBUsingSpace"
><A NAME="v%3AtoRGBUsingSpace"
></A
></A
><B
>toRGBUsingSpace</B
> :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Prelude.html#t%3AFractional"
>Fractional</A
> a =&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ARGBSpace"
>RGBSpace</A
> a -&gt; <A HREF="Data-Colour-RGBSpace.html#t%3AColour"
>Colour</A
> a -&gt; <A HREF="Data-Colour-RGBSpace.html#t%3ARGB"
>RGB</A
> a</TD
><TD CLASS="declbut"
><A HREF="src/Data-Colour-RGBSpace.html#toRGBUsingSpace"
>Source</A
></TD
></TR
></TABLE
></TD
></TR
><TR
><TD CLASS="doc"
>Return the coordinates of a given <TT
><A HREF="Data-Colour-RGBSpace.html#t%3AColour"
>Colour</A
></TT
> for a general <TT
><A HREF="Data-Colour-RGBSpace.html#t%3ARGBSpace"
>RGBSpace</A
></TT
>.
</TD
></TR
><TR
><TD CLASS="s15"
></TD
></TR
><TR
><TD CLASS="botbar"
>Produced by <A HREF="http://www.haskell.org/haddock/"
>Haddock</A
> version 2.6.1</TD
></TR
></TABLE
></BODY
></HTML
>

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