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<pre><a name="line-1"></a><span class='hs-comment'>{-# OPTIONS_HADDOCK not-home #-}</span>
<a name="line-2"></a><span class='hs-comment'>{-
<a name="line-3"></a>Copyright (c) 2008, 2009
<a name="line-4"></a>Russell O'Connor
<a name="line-5"></a>
<a name="line-6"></a>Permission is hereby granted, free of charge, to any person obtaining a copy
<a name="line-7"></a>of this software and associated documentation files (the "Software"), to deal
<a name="line-8"></a>in the Software without restriction, including without limitation the rights
<a name="line-9"></a>to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
<a name="line-10"></a>copies of the Software, and to permit persons to whom the Software is
<a name="line-11"></a>furnished to do so, subject to the following conditions:
<a name="line-12"></a>
<a name="line-13"></a>The above copyright notice and this permission notice shall be included in
<a name="line-14"></a>all copies or substantial portions of the Software.
<a name="line-15"></a>
<a name="line-16"></a>THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
<a name="line-17"></a>IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
<a name="line-18"></a>FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
<a name="line-19"></a>AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
<a name="line-20"></a>LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
<a name="line-21"></a>OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
<a name="line-22"></a>THE SOFTWARE.
<a name="line-23"></a>-}</span>
<a name="line-24"></a><span class='hs-comment'>-- |Provides a /linear/ colour space with the same gamut as</span>
<a name="line-25"></a><span class='hs-comment'>-- "Data.Colour.SRGB".</span>
<a name="line-26"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Colour</span><span class='hs-varop'>.</span><span class='hs-conid'>SRGB</span><span class='hs-varop'>.</span><span class='hs-conid'>Linear</span>
<a name="line-27"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Colour</span><span class='hs-layout'>,</span> <span class='hs-conid'>RGB</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-28"></a> <span class='hs-layout'>,</span><span class='hs-varid'>rgb</span><span class='hs-layout'>,</span> <span class='hs-varid'>toRGB</span>
<a name="line-29"></a> <span class='hs-layout'>,</span><span class='hs-varid'>sRGBGamut</span>
<a name="line-30"></a> <span class='hs-layout'>)</span>
<a name="line-31"></a><span class='hs-keyword'>where</span>
<a name="line-32"></a>
<a name="line-33"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Colour</span><span class='hs-varop'>.</span><span class='hs-conid'>Internal</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>Internal</span><span class='hs-layout'>(</span><span class='hs-conid'>Colour</span><span class='hs-layout'>(</span><span class='hs-conid'>RGB</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-34"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Colour</span><span class='hs-varop'>.</span><span class='hs-conid'>Internal</span> <span class='hs-layout'>(</span><span class='hs-conid'>Colour</span><span class='hs-layout'>)</span>
<a name="line-35"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Colour</span><span class='hs-varop'>.</span><span class='hs-conid'>Chan</span>
<a name="line-36"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Colour</span><span class='hs-varop'>.</span><span class='hs-conid'>RGB</span>
<a name="line-37"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Colour</span><span class='hs-varop'>.</span><span class='hs-conid'>CIE</span><span class='hs-varop'>.</span><span class='hs-conid'>Chromaticity</span>
<a name="line-38"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Colour</span><span class='hs-varop'>.</span><span class='hs-conid'>CIE</span><span class='hs-varop'>.</span><span class='hs-conid'>Illuminant</span> <span class='hs-layout'>(</span><span class='hs-varid'>d65</span><span class='hs-layout'>)</span>
<a name="line-39"></a>
<a name="line-40"></a><a name="rgb"></a><span class='hs-comment'>-- |Constructs a 'Colour' from RGB values using the /linear/ RGB colour</span>
<a name="line-41"></a><span class='hs-comment'>-- with the same gamut as sRGB.</span>
<a name="line-42"></a><span class='hs-definition'>rgb</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Fractional</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Colour</span> <span class='hs-varid'>a</span>
<a name="line-43"></a><span class='hs-definition'>rgb</span> <span class='hs-varid'>r</span> <span class='hs-varid'>g</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Internal</span><span class='hs-varop'>.</span><span class='hs-conid'>RGB</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chan</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chan</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chan</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-44"></a>
<a name="line-45"></a><a name="toRGB"></a><span class='hs-comment'>-- |Return RGB values using the /linear/ RGB colour with the same gamut</span>
<a name="line-46"></a><span class='hs-comment'>-- as sRGB.</span>
<a name="line-47"></a><span class='hs-definition'>toRGB</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Fractional</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Colour</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>RGB</span> <span class='hs-varid'>a</span>
<a name="line-48"></a><span class='hs-definition'>toRGB</span> <span class='hs-layout'>(</span><span class='hs-conid'>Internal</span><span class='hs-varop'>.</span><span class='hs-conid'>RGB</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chan</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chan</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Chan</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>RGB</span> <span class='hs-varid'>r</span> <span class='hs-varid'>g</span> <span class='hs-varid'>b</span>
<a name="line-49"></a>
<a name="line-50"></a><a name="sRGBGamut"></a><span class='hs-comment'>-- |This is the gamut for the sRGB colour space.</span>
<a name="line-51"></a><span class='hs-definition'>sRGBGamut</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>RGBGamut</span>
<a name="line-52"></a><span class='hs-definition'>sRGBGamut</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>RGBGamut</span> <span class='hs-layout'>(</span><span class='hs-conid'>RGB</span> <span class='hs-layout'>(</span><span class='hs-varid'>mkChromaticity</span> <span class='hs-num'>0.64</span> <span class='hs-num'>0.33</span><span class='hs-layout'>)</span>
<a name="line-53"></a> <span class='hs-layout'>(</span><span class='hs-varid'>mkChromaticity</span> <span class='hs-num'>0.30</span> <span class='hs-num'>0.60</span><span class='hs-layout'>)</span>
<a name="line-54"></a> <span class='hs-layout'>(</span><span class='hs-varid'>mkChromaticity</span> <span class='hs-num'>0.15</span> <span class='hs-num'>0.06</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-55"></a> <span class='hs-varid'>d65</span>
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