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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<!-- Generated by HsColour, http://code.haskell.org/~malcolm/hscolour/ -->
<title>dist-ghc/build/Graphics/GD.hs</title>
<link type='text/css' rel='stylesheet' href='hscolour.css' />
</head>
<body>
<pre><a name="line-1"></a><span class='hs-comment'>{-# LINE 1 "Graphics/GD.hsc" #-}</span>
<a name="line-2"></a><span class='hs-comment'>{-# LANGUAGE EmptyDataDecls #-}</span>
<a name="line-3"></a><span class='hs-comment'>{-# LINE 2 "Graphics/GD.hsc" #-}</span>
<a name="line-4"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>GD</span> <span class='hs-layout'>(</span>
<a name="line-5"></a>                    <span class='hs-comment'>-- * Types</span>
<a name="line-6"></a>                    <span class='hs-conid'>Image</span><span class='hs-layout'>,</span> <span class='hs-conid'>Size</span><span class='hs-layout'>,</span> <span class='hs-conid'>Point</span><span class='hs-layout'>,</span> <span class='hs-conid'>Color</span><span class='hs-layout'>,</span> <span class='hs-conid'>PCREOption</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-7"></a>                    <span class='hs-comment'>-- * Creating and copying images</span>
<a name="line-8"></a>                    <span class='hs-varid'>newImage</span><span class='hs-layout'>,</span> <span class='hs-varid'>copyImage</span><span class='hs-layout'>,</span> 
<a name="line-9"></a>                    <span class='hs-varid'>copyRegion</span><span class='hs-layout'>,</span> <span class='hs-varid'>copyRegionScaled</span><span class='hs-layout'>,</span>
<a name="line-10"></a>                    <span class='hs-comment'>-- * Memory management</span>
<a name="line-11"></a>                    <span class='hs-varid'>withImage</span><span class='hs-layout'>,</span>
<a name="line-12"></a>                    <span class='hs-comment'>-- * Loading images</span>
<a name="line-13"></a>                    <span class='hs-comment'>-- ** JPEG</span>
<a name="line-14"></a>                    <span class='hs-varid'>loadJpegFile</span><span class='hs-layout'>,</span> <span class='hs-varid'>loadJpegData</span><span class='hs-layout'>,</span> <span class='hs-varid'>loadJpegByteString</span><span class='hs-layout'>,</span>
<a name="line-15"></a>                    <span class='hs-comment'>-- ** PNG</span>
<a name="line-16"></a>                    <span class='hs-varid'>loadPngFile</span><span class='hs-layout'>,</span> <span class='hs-varid'>loadPngData</span><span class='hs-layout'>,</span> <span class='hs-varid'>loadPngByteString</span><span class='hs-layout'>,</span>
<a name="line-17"></a>                    <span class='hs-comment'>-- ** GIF</span>
<a name="line-18"></a>                    <span class='hs-varid'>loadGifFile</span><span class='hs-layout'>,</span> <span class='hs-varid'>loadGifData</span><span class='hs-layout'>,</span> <span class='hs-varid'>loadGifByteString</span><span class='hs-layout'>,</span>
<a name="line-19"></a>                    <span class='hs-comment'>-- * Saving images</span>
<a name="line-20"></a>                    <span class='hs-comment'>-- ** JPEG</span>
<a name="line-21"></a>                    <span class='hs-varid'>saveJpegFile</span><span class='hs-layout'>,</span> <span class='hs-varid'>saveJpegByteString</span><span class='hs-layout'>,</span>
<a name="line-22"></a>                    <span class='hs-comment'>-- ** PNG</span>
<a name="line-23"></a>                    <span class='hs-varid'>savePngFile</span><span class='hs-layout'>,</span> <span class='hs-varid'>savePngByteString</span><span class='hs-layout'>,</span>
<a name="line-24"></a>                    <span class='hs-comment'>-- ** GIF</span>
<a name="line-25"></a>                    <span class='hs-varid'>saveGifFile</span><span class='hs-layout'>,</span> <span class='hs-varid'>saveGifByteString</span><span class='hs-layout'>,</span>
<a name="line-26"></a>                    <span class='hs-comment'>-- * Getting image information</span>
<a name="line-27"></a>                    <span class='hs-varid'>imageSize</span><span class='hs-layout'>,</span>
<a name="line-28"></a>                    <span class='hs-comment'>-- * Querying</span>
<a name="line-29"></a>                    <span class='hs-varid'>getPixel</span><span class='hs-layout'>,</span>
<a name="line-30"></a>                    <span class='hs-comment'>-- * Manipulating images</span>
<a name="line-31"></a>                    <span class='hs-varid'>resizeImage</span><span class='hs-layout'>,</span> <span class='hs-varid'>rotateImage</span><span class='hs-layout'>,</span>
<a name="line-32"></a>                    <span class='hs-comment'>-- * Drawing</span>
<a name="line-33"></a>                    <span class='hs-varid'>brushed</span><span class='hs-layout'>,</span>
<a name="line-34"></a>                    <span class='hs-varid'>setBrush</span><span class='hs-layout'>,</span>
<a name="line-35"></a>                    <span class='hs-varid'>fillImage</span><span class='hs-layout'>,</span>
<a name="line-36"></a>                    <span class='hs-varid'>drawFilledRectangle</span><span class='hs-layout'>,</span>
<a name="line-37"></a>                    <span class='hs-varid'>drawFilledEllipse</span><span class='hs-layout'>,</span>
<a name="line-38"></a>                    <span class='hs-varid'>drawLine</span><span class='hs-layout'>,</span>
<a name="line-39"></a>                    <span class='hs-varid'>drawArc</span><span class='hs-layout'>,</span>
<a name="line-40"></a>                    <span class='hs-varid'>antiAliased</span><span class='hs-layout'>,</span>
<a name="line-41"></a>                    <span class='hs-varid'>setPixel</span><span class='hs-layout'>,</span>
<a name="line-42"></a>                    <span class='hs-varid'>colorAllocate</span><span class='hs-layout'>,</span>
<a name="line-43"></a>                    <span class='hs-comment'>-- * Text</span>
<a name="line-44"></a>                    <span class='hs-varid'>useFontConfig</span><span class='hs-layout'>,</span>
<a name="line-45"></a>                    <span class='hs-varid'>drawString</span><span class='hs-layout'>,</span> <span class='hs-varid'>measureString</span><span class='hs-layout'>,</span>
<a name="line-46"></a>                    <span class='hs-varid'>drawStringCircle</span><span class='hs-layout'>,</span>
<a name="line-47"></a>                    <span class='hs-comment'>-- * Colors</span>
<a name="line-48"></a>                    <span class='hs-varid'>rgb</span><span class='hs-layout'>,</span> <span class='hs-varid'>rgba</span><span class='hs-layout'>,</span> <span class='hs-varid'>toRGBA</span><span class='hs-layout'>,</span>
<a name="line-49"></a>                    <span class='hs-comment'>-- * Misc</span>
<a name="line-50"></a>                    <span class='hs-varid'>saveAlpha</span><span class='hs-layout'>,</span>
<a name="line-51"></a>                    <span class='hs-varid'>alphaBlending</span><span class='hs-layout'>,</span>
<a name="line-52"></a>
<a name="line-53"></a>                   <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-54"></a>
<a name="line-55"></a><span class='hs-keyword'>import</span>           <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Exception</span>        <span class='hs-layout'>(</span><span class='hs-varid'>bracket</span><span class='hs-layout'>)</span>
<a name="line-56"></a><span class='hs-keyword'>import</span>           <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span>            <span class='hs-layout'>(</span><span class='hs-varid'>liftM</span><span class='hs-layout'>,</span> <span class='hs-varid'>unless</span><span class='hs-layout'>)</span>
<a name="line-57"></a><span class='hs-keyword'>import</span>           <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Bits</span>
<a name="line-58"></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'>ByteString</span><span class='hs-varop'>.</span><span class='hs-conid'>Internal</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>B</span>
<a name="line-59"></a><span class='hs-keyword'>import</span>           <span class='hs-conid'>Foreign</span>                  <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span><span class='hs-layout'>,</span><span class='hs-conid'>FunPtr</span><span class='hs-layout'>,</span><span class='hs-conid'>ForeignPtr</span><span class='hs-layout'>)</span>
<a name="line-60"></a><span class='hs-keyword'>import</span>           <span class='hs-conid'>Foreign</span>                  <span class='hs-layout'>(</span><span class='hs-varid'>peekByteOff</span><span class='hs-layout'>)</span>
<a name="line-61"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Foreign</span>                  <span class='hs-keyword'>as</span> <span class='hs-conid'>F</span>
<a name="line-62"></a><span class='hs-keyword'>import</span>           <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>C</span>                <span class='hs-layout'>(</span><span class='hs-conid'>CString</span><span class='hs-layout'>)</span>
<a name="line-63"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>C</span>                <span class='hs-keyword'>as</span> <span class='hs-conid'>C</span>
<a name="line-64"></a><span class='hs-keyword'>import</span>           <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span>
<a name="line-65"></a>
<a name="line-66"></a><a name="CFILE"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>CFILE</span>
<a name="line-67"></a>
<a name="line-68"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"stdio.h fopen"</span> <span class='hs-varid'>c_fopen</span>
<a name="line-69"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CString</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CString</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>CFILE</span><span class='hs-layout'>)</span>
<a name="line-70"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"stdio.h fclose"</span> <span class='hs-varid'>c_fclose</span>
<a name="line-71"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>CFILE</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-72"></a>
<a name="line-73"></a><a name="fopen"></a><span class='hs-definition'>fopen</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>CFILE</span><span class='hs-layout'>)</span>
<a name="line-74"></a><span class='hs-definition'>fopen</span> <span class='hs-varid'>file</span> <span class='hs-varid'>mode</span> <span class='hs-keyglyph'>=</span> 
<a name="line-75"></a>    <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>throwErrnoIfNull</span> <span class='hs-varid'>file</span> <span class='hs-varop'>$</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>withCString</span> <span class='hs-varid'>file</span> <span class='hs-varop'>$</span> 
<a name="line-76"></a>                         <span class='hs-keyglyph'>\</span><span class='hs-varid'>f</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>withCString</span> <span class='hs-varid'>mode</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>m</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>c_fopen</span> <span class='hs-varid'>f</span> <span class='hs-varid'>m</span>
<a name="line-77"></a>
<a name="line-78"></a><a name="fclose"></a><span class='hs-definition'>fclose</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>CFILE</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-79"></a><span class='hs-definition'>fclose</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>throwErrnoIf_</span> <span class='hs-layout'>(</span><span class='hs-varop'>==</span> <span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-str'>"fclose"</span> <span class='hs-varop'>$</span> <span class='hs-varid'>c_fclose</span> <span class='hs-varid'>p</span>
<a name="line-80"></a><span class='hs-comment'>{-# LINE 78 "Graphics/GD.hsc" #-}</span>
<a name="line-81"></a>
<a name="line-82"></a><a name="withCFILE"></a><span class='hs-definition'>withCFILE</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>CFILE</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span>
<a name="line-83"></a><span class='hs-definition'>withCFILE</span> <span class='hs-varid'>file</span> <span class='hs-varid'>mode</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>bracket</span> <span class='hs-layout'>(</span><span class='hs-varid'>fopen</span> <span class='hs-varid'>file</span> <span class='hs-varid'>mode</span><span class='hs-layout'>)</span> <span class='hs-varid'>fclose</span>
<a name="line-84"></a>
<a name="line-85"></a>
<a name="line-86"></a><span class='hs-comment'>{-# LINE 83 "Graphics/GD.hsc" #-}</span>
<a name="line-87"></a>
<a name="line-88"></a><span class='hs-comment'>{-# LINE 84 "Graphics/GD.hsc" #-}</span>
<a name="line-89"></a>
<a name="line-90"></a><a name="GDImage"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>GDImage</span>
<a name="line-91"></a>
<a name="line-92"></a><span class='hs-comment'>-- JPEG format</span>
<a name="line-93"></a>
<a name="line-94"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImageCreateFromJpeg"</span> <span class='hs-varid'>gdImageCreateFromJpeg</span>
<a name="line-95"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>CFILE</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span><span class='hs-layout'>)</span>
<a name="line-96"></a>
<a name="line-97"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImageCreateFromJpegPtr"</span> <span class='hs-varid'>gdImageCreateFromJpegPtr</span>
<a name="line-98"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span><span class='hs-layout'>)</span>
<a name="line-99"></a>
<a name="line-100"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImageJpeg"</span> <span class='hs-varid'>gdImageJpeg</span>
<a name="line-101"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>CFILE</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-102"></a>
<a name="line-103"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImageJpegPtr"</span> <span class='hs-varid'>gdImageJpegPtr</span>
<a name="line-104"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-105"></a>
<a name="line-106"></a><span class='hs-comment'>-- PNG format</span>
<a name="line-107"></a>
<a name="line-108"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImageCreateFromPng"</span> <span class='hs-varid'>gdImageCreateFromPng</span>
<a name="line-109"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>CFILE</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span><span class='hs-layout'>)</span>
<a name="line-110"></a>
<a name="line-111"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImageCreateFromPngPtr"</span> <span class='hs-varid'>gdImageCreateFromPngPtr</span>
<a name="line-112"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span><span class='hs-layout'>)</span>
<a name="line-113"></a>
<a name="line-114"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImagePng"</span> <span class='hs-varid'>gdImagePng</span>
<a name="line-115"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>CFILE</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-116"></a>
<a name="line-117"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImagePngPtr"</span> <span class='hs-varid'>gdImagePngPtr</span>
<a name="line-118"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-119"></a>
<a name="line-120"></a><span class='hs-comment'>-- GIF format</span>
<a name="line-121"></a>
<a name="line-122"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImageCreateFromGif"</span> <span class='hs-varid'>gdImageCreateFromGif</span>
<a name="line-123"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>CFILE</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span><span class='hs-layout'>)</span>
<a name="line-124"></a>
<a name="line-125"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImageCreateFromGifPtr"</span> <span class='hs-varid'>gdImageCreateFromGifPtr</span>
<a name="line-126"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span><span class='hs-layout'>)</span>
<a name="line-127"></a>
<a name="line-128"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImageGif"</span> <span class='hs-varid'>gdImageGif</span>
<a name="line-129"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>CFILE</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-130"></a>
<a name="line-131"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImageGifPtr"</span> <span class='hs-varid'>gdImageGifPtr</span>
<a name="line-132"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-133"></a>
<a name="line-134"></a><span class='hs-comment'>-- Creating and destroying images</span>
<a name="line-135"></a>
<a name="line-136"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImageCreateTrueColor"</span> <span class='hs-varid'>gdImageCreateTrueColor</span> 
<a name="line-137"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span><span class='hs-layout'>)</span>
<a name="line-138"></a>
<a name="line-139"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImageDestroy"</span> <span class='hs-varid'>gdImageDestroy</span>
<a name="line-140"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-141"></a>
<a name="line-142"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd-extras.h &amp;gdImagePtrDestroyIfNotNull"</span>
<a name="line-143"></a>        <span class='hs-varid'>ptr_gdImagePtrDestroyIfNotNull</span> 
<a name="line-144"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FunPtr</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span>
<a name="line-145"></a>
<a name="line-146"></a>
<a name="line-147"></a><span class='hs-comment'>-- Copying image parts</span>
<a name="line-148"></a>
<a name="line-149"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImageCopy"</span> <span class='hs-varid'>gdImageCopy</span>
<a name="line-150"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> 
<a name="line-151"></a>    <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span>
<a name="line-152"></a>    <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-153"></a>
<a name="line-154"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImageCopyResampled"</span> <span class='hs-varid'>gdImageCopyResampled</span>
<a name="line-155"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> 
<a name="line-156"></a>    <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span>
<a name="line-157"></a>    <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-158"></a>
<a name="line-159"></a><span class='hs-comment'>{-
<a name="line-160"></a>foreign import ccall "gd.h gdImageCopyRotated" gdImageCopyRotated
<a name="line-161"></a>    :: Ptr GDImage -&gt; Ptr GDImage 
<a name="line-162"></a>    -&gt; CDouble -&gt; CDouble -&gt; CInt -&gt; CInt
<a name="line-163"></a>    -&gt; CInt -&gt; CInt -&gt; CInt -&gt; IO ()
<a name="line-164"></a>-}</span>
<a name="line-165"></a>
<a name="line-166"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd-extras.h gdImageCopyRotated90"</span> <span class='hs-varid'>gdImageCopyRotated90</span>
<a name="line-167"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> 
<a name="line-168"></a>    <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span>
<a name="line-169"></a>    <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-170"></a>
<a name="line-171"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImageGetPixel"</span> <span class='hs-varid'>gdImageGetPixel</span>
<a name="line-172"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-173"></a>
<a name="line-174"></a><span class='hs-comment'>-- Drawing functions</span>
<a name="line-175"></a>
<a name="line-176"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImageSetBrush"</span> <span class='hs-varid'>gdImageSetBrush</span>
<a name="line-177"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-178"></a>
<a name="line-179"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImageFilledRectangle"</span> <span class='hs-varid'>gdImageFilledRectangle</span>
<a name="line-180"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-181"></a>
<a name="line-182"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImageFilledEllipse"</span> <span class='hs-varid'>gdImageFilledEllipse</span>
<a name="line-183"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-184"></a>
<a name="line-185"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImageLine"</span> <span class='hs-varid'>gdImageLine</span>
<a name="line-186"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-187"></a>
<a name="line-188"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImageArc"</span> <span class='hs-varid'>gdImageArc</span>
<a name="line-189"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span>
<a name="line-190"></a>    <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-191"></a>
<a name="line-192"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImageSetAntiAliased"</span> <span class='hs-varid'>gdImageSetAntiAliased</span>
<a name="line-193"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-194"></a>
<a name="line-195"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImageSetPixel"</span> <span class='hs-varid'>gdImageSetPixel</span>
<a name="line-196"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-197"></a>
<a name="line-198"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImageColorAllocate"</span> <span class='hs-varid'>gdImageColorAllocate</span>
<a name="line-199"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-200"></a>
<a name="line-201"></a><span class='hs-comment'>-- Text functions</span>
<a name="line-202"></a>
<a name="line-203"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdFTUseFontConfig"</span> <span class='hs-varid'>gdFTUseFontConfig</span>
<a name="line-204"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-205"></a>
<a name="line-206"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImageStringFT"</span> <span class='hs-varid'>gdImageStringFT</span>
<a name="line-207"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CString</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CDouble</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CDouble</span> <span class='hs-keyglyph'>-&gt;</span>
<a name="line-208"></a>       <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CString</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CString</span>
<a name="line-209"></a>
<a name="line-210"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImageStringFTCircle"</span> <span class='hs-varid'>gdImageStringFTCircle</span>
<a name="line-211"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CDouble</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CDouble</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CDouble</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CString</span>
<a name="line-212"></a>       <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CDouble</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CString</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CString</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CString</span>
<a name="line-213"></a>
<a name="line-214"></a><span class='hs-comment'>-- Miscellaneous functions</span>
<a name="line-215"></a>
<a name="line-216"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h &amp;gdFree"</span> <span class='hs-varid'>gdFree</span>
<a name="line-217"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FunPtr</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span>
<a name="line-218"></a>    
<a name="line-219"></a><a name="toRGBA"></a><span class='hs-definition'>toRGBA</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Color</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-layout'>(</span><span class='hs-conid'>Int</span><span class='hs-layout'>,</span> <span class='hs-conid'>Int</span><span class='hs-layout'>,</span> <span class='hs-conid'>Int</span><span class='hs-layout'>,</span> <span class='hs-conid'>Int</span><span class='hs-layout'>)</span> 
<a name="line-220"></a><span class='hs-definition'>toRGBA</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>r</span><span class='hs-layout'>,</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>g</span><span class='hs-layout'>,</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>b</span><span class='hs-layout'>,</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-221"></a> <span class='hs-keyword'>where</span>
<a name="line-222"></a>   <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>c</span> <span class='hs-varop'>`mod`</span> <span class='hs-varid'>byte</span>
<a name="line-223"></a>   <span class='hs-varid'>g</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>shiftR</span> <span class='hs-varid'>c</span> <span class='hs-num'>8</span> <span class='hs-varop'>`mod`</span> <span class='hs-varid'>byte</span>
<a name="line-224"></a>   <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>shiftR</span> <span class='hs-varid'>c</span> <span class='hs-num'>16</span> <span class='hs-varop'>`mod`</span> <span class='hs-varid'>byte</span>
<a name="line-225"></a>   <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>shiftR</span> <span class='hs-varid'>c</span> <span class='hs-num'>24</span> <span class='hs-varop'>`mod`</span> <span class='hs-varid'>byte</span>
<a name="line-226"></a>   <span class='hs-varid'>byte</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>2</span> <span class='hs-varop'>^</span> <span class='hs-layout'>(</span><span class='hs-num'>8</span><span class='hs-keyglyph'>::</span><span class='hs-conid'>Int</span><span class='hs-layout'>)</span>
<a name="line-227"></a>
<a name="line-228"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImageSaveAlpha"</span> <span class='hs-varid'>gdImageSaveAlpha</span>
<a name="line-229"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-230"></a>
<a name="line-231"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-str'>"gd.h gdImageAlphaBlending"</span> <span class='hs-varid'>gdImageAlphaBlending</span>
<a name="line-232"></a>    <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-233"></a>
<a name="line-234"></a><a name="PCREOption"></a><span class='hs-comment'>-- | To access the definition 'gdBrush' from GD</span>
<a name="line-235"></a><a name="PCREOption"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>PCREOption</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PCREOption</span> <span class='hs-layout'>{</span> <span class='hs-varid'>unPCREOption</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CInt</span> <span class='hs-layout'>}</span>
<a name="line-236"></a>    <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span><span class='hs-layout'>,</span><span class='hs-conid'>Show</span><span class='hs-layout'>)</span>
<a name="line-237"></a>
<a name="line-238"></a><a name="Image"></a><span class='hs-comment'>-- We use a second level of indirection to allow storing a null pointer</span>
<a name="line-239"></a><a name="Image"></a><span class='hs-comment'>-- when the image has already been freed. This allows 'withImage' to </span>
<a name="line-240"></a><a name="Image"></a><span class='hs-comment'>-- free the @gdImage@ early.</span>
<a name="line-241"></a><a name="Image"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>Image</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Image</span> <span class='hs-layout'>(</span><span class='hs-conid'>ForeignPtr</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-242"></a>
<a name="line-243"></a><a name="Size"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Size</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>Int</span><span class='hs-layout'>,</span><span class='hs-conid'>Int</span><span class='hs-layout'>)</span>
<a name="line-244"></a>
<a name="line-245"></a><a name="Point"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Point</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>Int</span><span class='hs-layout'>,</span><span class='hs-conid'>Int</span><span class='hs-layout'>)</span>
<a name="line-246"></a>
<a name="line-247"></a><a name="Color"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Color</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>CInt</span>
<a name="line-248"></a>
<a name="line-249"></a><a name="mkImage"></a><span class='hs-definition'>mkImage</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Image</span>
<a name="line-250"></a><span class='hs-definition'>mkImage</span> <span class='hs-varid'>img</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>fp</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>mallocForeignPtr</span>
<a name="line-251"></a>                 <span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>fp</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>poke</span> <span class='hs-varid'>p</span> <span class='hs-varid'>img</span>
<a name="line-252"></a>                 <span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>addForeignPtrFinalizer</span> <span class='hs-varid'>ptr_gdImagePtrDestroyIfNotNull</span> <span class='hs-varid'>fp</span>
<a name="line-253"></a>                 <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Image</span> <span class='hs-varid'>fp</span>
<a name="line-254"></a>
<a name="line-255"></a><a name="withImage"></a><span class='hs-comment'>-- | Creates an image, performs an operation on the image, and</span>
<a name="line-256"></a><span class='hs-comment'>-- frees it.</span>
<a name="line-257"></a><span class='hs-comment'>-- This function allows block scoped management of 'Image'</span>
<a name="line-258"></a><span class='hs-comment'>-- objects.  If you are handling large images, the delay before</span>
<a name="line-259"></a><span class='hs-comment'>-- the finalizer which frees the image runs may cause significant</span>
<a name="line-260"></a><span class='hs-comment'>-- temporary extra memory use.  Use this function to force the</span>
<a name="line-261"></a><span class='hs-comment'>-- image to be freed as soons as you are done with it.  Note that</span>
<a name="line-262"></a><span class='hs-comment'>-- it is unsafe to hold on to the 'Image' after the function is</span>
<a name="line-263"></a><span class='hs-comment'>-- done.</span>
<a name="line-264"></a><span class='hs-definition'>withImage</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Image</span>        <span class='hs-comment'>-- ^ Image creation action.</span>
<a name="line-265"></a>          <span class='hs-keyglyph'>-&gt;</span> <span class='hs-layout'>(</span><span class='hs-conid'>Image</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- ^ Some operation on the image. The result should</span>
<a name="line-266"></a>                             <span class='hs-comment'>-- not reference the 'Image'.</span>
<a name="line-267"></a>          <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span>
<a name="line-268"></a><span class='hs-definition'>withImage</span> <span class='hs-varid'>ini</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>bracket</span> <span class='hs-varid'>ini</span> <span class='hs-varid'>freeImage</span> <span class='hs-varid'>f</span>
<a name="line-269"></a>
<a name="line-270"></a><a name="freeImage"></a><span class='hs-comment'>-- | Overwrites the pointer with a null pointer, and frees the @gdImage@. </span>
<a name="line-271"></a><span class='hs-comment'>-- Safe to call twice. Doesn't free the 'ForeignPtr', we rely on the</span>
<a name="line-272"></a><span class='hs-comment'>-- GC to do that.</span>
<a name="line-273"></a><span class='hs-definition'>freeImage</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Image</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-274"></a><span class='hs-definition'>freeImage</span> <span class='hs-layout'>(</span><span class='hs-conid'>Image</span> <span class='hs-varid'>fp</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>fp</span> <span class='hs-varop'>$</span> 
<a name="line-275"></a>  <span class='hs-keyglyph'>\</span><span class='hs-varid'>pp</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>peek</span> <span class='hs-varid'>pp</span>
<a name="line-276"></a>            <span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>poke</span> <span class='hs-varid'>pp</span> <span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>nullPtr</span>
<a name="line-277"></a>            <span class='hs-varid'>unless</span> <span class='hs-layout'>(</span><span class='hs-varid'>p</span> <span class='hs-varop'>==</span> <span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>nullPtr</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>gdImageDestroy</span> <span class='hs-varid'>p</span>
<a name="line-278"></a>
<a name="line-279"></a><a name="withImagePtr"></a><span class='hs-definition'>withImagePtr</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Image</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span>
<a name="line-280"></a><span class='hs-definition'>withImagePtr</span> <span class='hs-layout'>(</span><span class='hs-conid'>Image</span> <span class='hs-varid'>fp</span><span class='hs-layout'>)</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>fp</span> <span class='hs-varop'>$</span>
<a name="line-281"></a>  <span class='hs-keyglyph'>\</span><span class='hs-varid'>pp</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>peek</span> <span class='hs-varid'>pp</span> <span class='hs-varop'>&gt;&gt;=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-&gt;</span>
<a name="line-282"></a>       <span class='hs-keyword'>if</span> <span class='hs-varid'>p</span> <span class='hs-varop'>==</span> <span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>nullPtr</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>fail</span> <span class='hs-str'>"Image has been freed."</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>f</span> <span class='hs-varid'>p</span>
<a name="line-283"></a>
<a name="line-284"></a><a name="newImage"></a><span class='hs-comment'>-- | Create a new empty image.</span>
<a name="line-285"></a><span class='hs-definition'>newImage</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Size</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Image</span>
<a name="line-286"></a><span class='hs-definition'>newImage</span> <span class='hs-layout'>(</span><span class='hs-varid'>w</span><span class='hs-layout'>,</span><span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>newImage_</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span>
<a name="line-287"></a>
<a name="line-288"></a><a name="newImage_"></a><span class='hs-definition'>newImage_</span>  <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Image</span>
<a name="line-289"></a><span class='hs-definition'>newImage_</span> <span class='hs-varid'>w</span> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>throwIfNull</span> <span class='hs-str'>"gdImageCreateTrueColor"</span> <span class='hs-varop'>$</span>
<a name="line-290"></a>                        <span class='hs-varid'>gdImageCreateTrueColor</span> <span class='hs-varid'>w</span> <span class='hs-varid'>h</span>
<a name="line-291"></a>                   <span class='hs-varid'>mkImage</span> <span class='hs-varid'>p</span>
<a name="line-292"></a>
<a name="line-293"></a><a name="onNewImage"></a><span class='hs-comment'>-- | Create a new empty image and apply a function to it.</span>
<a name="line-294"></a><span class='hs-definition'>onNewImage</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Image</span>
<a name="line-295"></a><span class='hs-definition'>onNewImage</span> <span class='hs-varid'>w</span> <span class='hs-varid'>h</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>newImage_</span> <span class='hs-varid'>w</span> <span class='hs-varid'>h</span> <span class='hs-varop'>&gt;&gt;=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>i</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>withImagePtr</span> <span class='hs-varid'>i</span> <span class='hs-varid'>f</span> <span class='hs-varop'>&gt;&gt;</span> <span class='hs-varid'>return</span> <span class='hs-varid'>i</span>
<a name="line-296"></a>
<a name="line-297"></a><a name="copyImage"></a><span class='hs-comment'>-- | Make a copy of an image.</span>
<a name="line-298"></a><span class='hs-definition'>copyImage</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Image</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Image</span>
<a name="line-299"></a><span class='hs-definition'>copyImage</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withImagePtr</span> <span class='hs-varid'>i</span> <span class='hs-varid'>f</span>
<a name="line-300"></a>  <span class='hs-keyword'>where</span> <span class='hs-varid'>f</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-layout'>(</span><span class='hs-varid'>w</span><span class='hs-layout'>,</span><span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>imageSize_</span> <span class='hs-varid'>p</span>
<a name="line-301"></a>                 <span class='hs-varid'>onNewImage</span> <span class='hs-varid'>w</span> <span class='hs-varid'>h</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>p'</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>gdImageCopy</span> <span class='hs-varid'>p'</span> <span class='hs-varid'>p</span> <span class='hs-num'>0</span> <span class='hs-num'>0</span> <span class='hs-num'>0</span> <span class='hs-num'>0</span> <span class='hs-varid'>w</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span>
<a name="line-302"></a>
<a name="line-303"></a><a name="copyRegion"></a><span class='hs-comment'>-- | Copy a region of one image into another</span>
<a name="line-304"></a><span class='hs-definition'>copyRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Point</span>    <span class='hs-comment'>-- ^ Source upper left-hand corner</span>
<a name="line-305"></a>              <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Size</span>  <span class='hs-comment'>-- ^ Size of copied region</span>
<a name="line-306"></a>              <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Image</span> <span class='hs-comment'>-- ^ Source image</span>
<a name="line-307"></a>              <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Point</span> <span class='hs-comment'>-- ^ Destination upper left-hand corner</span>
<a name="line-308"></a>              <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Image</span> <span class='hs-comment'>-- ^ Destination image</span>
<a name="line-309"></a>              <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-310"></a><span class='hs-definition'>copyRegion</span> <span class='hs-layout'>(</span><span class='hs-varid'>srcX</span><span class='hs-layout'>,</span> <span class='hs-varid'>srcY</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>w</span><span class='hs-layout'>,</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>srcIPtr</span> <span class='hs-layout'>(</span><span class='hs-varid'>dstX</span><span class='hs-layout'>,</span> <span class='hs-varid'>dstY</span><span class='hs-layout'>)</span> <span class='hs-varid'>dstIPtr</span>
<a name="line-311"></a>    <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withImagePtr</span> <span class='hs-varid'>dstIPtr</span> <span class='hs-varop'>$</span>
<a name="line-312"></a>      <span class='hs-keyglyph'>\</span><span class='hs-varid'>dstImg</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>withImagePtr</span> <span class='hs-varid'>srcIPtr</span> <span class='hs-varop'>$</span>
<a name="line-313"></a>      <span class='hs-keyglyph'>\</span><span class='hs-varid'>srcImg</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>gdImageCopy</span> <span class='hs-varid'>dstImg</span> <span class='hs-varid'>srcImg</span>
<a name="line-314"></a>                    <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>dstX</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>dstY</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>srcX</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>srcY</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span>
<a name="line-315"></a>
<a name="line-316"></a><a name="copyRegionScaled"></a><span class='hs-comment'>-- | Copy a region of one image into another, rescaling the region </span>
<a name="line-317"></a><span class='hs-definition'>copyRegionScaled</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Point</span> <span class='hs-comment'>-- ^ Source upper left-hand corner</span>
<a name="line-318"></a>                 <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Size</span>  <span class='hs-comment'>-- ^ Size of source region</span>
<a name="line-319"></a>                 <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Image</span> <span class='hs-comment'>-- ^ Source image</span>
<a name="line-320"></a>                 <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Point</span> <span class='hs-comment'>-- ^ Destination upper left-hand corner</span>
<a name="line-321"></a>                 <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Size</span>  <span class='hs-comment'>-- ^ Size of destination region</span>
<a name="line-322"></a>                 <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Image</span> <span class='hs-comment'>-- ^ Destination image</span>
<a name="line-323"></a>                 <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-324"></a><span class='hs-definition'>copyRegionScaled</span> <span class='hs-layout'>(</span><span class='hs-varid'>srcX</span><span class='hs-layout'>,</span><span class='hs-varid'>srcY</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>srcW</span><span class='hs-layout'>,</span><span class='hs-varid'>srcH</span><span class='hs-layout'>)</span> <span class='hs-varid'>srcIPtr</span> <span class='hs-layout'>(</span><span class='hs-varid'>dstX</span><span class='hs-layout'>,</span><span class='hs-varid'>dstY</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>dstW</span><span class='hs-layout'>,</span><span class='hs-varid'>dstH</span><span class='hs-layout'>)</span> <span class='hs-varid'>dstIPtr</span>
<a name="line-325"></a>    <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withImagePtr</span> <span class='hs-varid'>dstIPtr</span> <span class='hs-varop'>$</span>
<a name="line-326"></a>      <span class='hs-keyglyph'>\</span><span class='hs-varid'>dstImg</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>withImagePtr</span> <span class='hs-varid'>srcIPtr</span> <span class='hs-varop'>$</span>
<a name="line-327"></a>      <span class='hs-keyglyph'>\</span><span class='hs-varid'>srcImg</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>gdImageCopyResampled</span> <span class='hs-varid'>dstImg</span> <span class='hs-varid'>srcImg</span>
<a name="line-328"></a>                   <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>dstX</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>dstY</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>srcX</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>srcY</span><span class='hs-layout'>)</span>
<a name="line-329"></a>                   <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>dstW</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>dstH</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>srcW</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>srcH</span><span class='hs-layout'>)</span>
<a name="line-330"></a>
<a name="line-331"></a><span class='hs-comment'>--</span>
<a name="line-332"></a><span class='hs-comment'>-- * Loading images</span>
<a name="line-333"></a><span class='hs-comment'>--</span>
<a name="line-334"></a>
<a name="line-335"></a><a name="loadJpegFile"></a><span class='hs-comment'>-- | Load a JPEG image from a file.</span>
<a name="line-336"></a><span class='hs-definition'>loadJpegFile</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Image</span>
<a name="line-337"></a><span class='hs-definition'>loadJpegFile</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>loadImageFile</span> <span class='hs-varid'>gdImageCreateFromJpeg</span>
<a name="line-338"></a>
<a name="line-339"></a><a name="loadJpegData"></a><span class='hs-comment'>-- | Load a JPEG image from a buffer.</span>
<a name="line-340"></a><span class='hs-definition'>loadJpegData</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span>   <span class='hs-comment'>-- ^ Buffer size.</span>
<a name="line-341"></a>             <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-comment'>-- ^ Buffer with image data.</span>
<a name="line-342"></a>             <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Image</span>
<a name="line-343"></a><span class='hs-definition'>loadJpegData</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>loadImageData</span> <span class='hs-varid'>gdImageCreateFromJpegPtr</span>
<a name="line-344"></a>
<a name="line-345"></a><a name="loadJpegByteString"></a><span class='hs-comment'>-- | Load a JPEG image from a ByteString</span>
<a name="line-346"></a><span class='hs-definition'>loadJpegByteString</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Image</span>
<a name="line-347"></a><span class='hs-definition'>loadJpegByteString</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>onByteStringData</span> <span class='hs-varid'>loadJpegData</span>
<a name="line-348"></a>
<a name="line-349"></a>
<a name="line-350"></a><a name="loadPngFile"></a><span class='hs-comment'>-- | Load a PNG image from a file.</span>
<a name="line-351"></a><span class='hs-definition'>loadPngFile</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Image</span>
<a name="line-352"></a><span class='hs-definition'>loadPngFile</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>loadImageFile</span> <span class='hs-varid'>gdImageCreateFromPng</span>
<a name="line-353"></a>
<a name="line-354"></a><a name="loadPngData"></a><span class='hs-comment'>-- | Load a PNG image from a buffer.</span>
<a name="line-355"></a><span class='hs-definition'>loadPngData</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span>   <span class='hs-comment'>-- ^ Buffer size.</span>
<a name="line-356"></a>            <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-comment'>-- ^ Buffer with image data.</span>
<a name="line-357"></a>            <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Image</span>
<a name="line-358"></a><span class='hs-definition'>loadPngData</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>loadImageData</span> <span class='hs-varid'>gdImageCreateFromPngPtr</span>
<a name="line-359"></a>
<a name="line-360"></a><a name="loadPngByteString"></a><span class='hs-comment'>-- | Load a PNG image from a ByteString</span>
<a name="line-361"></a><span class='hs-definition'>loadPngByteString</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Image</span>
<a name="line-362"></a><span class='hs-definition'>loadPngByteString</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>onByteStringData</span> <span class='hs-varid'>loadPngData</span>
<a name="line-363"></a>
<a name="line-364"></a><a name="loadGifFile"></a><span class='hs-comment'>-- | Load a GIF image from a file.</span>
<a name="line-365"></a><span class='hs-definition'>loadGifFile</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Image</span>
<a name="line-366"></a><span class='hs-definition'>loadGifFile</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>loadImageFile</span> <span class='hs-varid'>gdImageCreateFromGif</span>
<a name="line-367"></a>
<a name="line-368"></a><a name="loadGifData"></a><span class='hs-comment'>-- | Load a GIF image from a buffer.</span>
<a name="line-369"></a><span class='hs-definition'>loadGifData</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span>   <span class='hs-comment'>-- ^ Buffer size.</span>
<a name="line-370"></a>            <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-comment'>-- ^ Buffer with image data.</span>
<a name="line-371"></a>            <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Image</span>
<a name="line-372"></a><span class='hs-definition'>loadGifData</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>loadImageData</span> <span class='hs-varid'>gdImageCreateFromGifPtr</span>
<a name="line-373"></a>
<a name="line-374"></a><a name="loadGifByteString"></a><span class='hs-comment'>-- | Load a GIF image from a ByteString</span>
<a name="line-375"></a><span class='hs-definition'>loadGifByteString</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Image</span>
<a name="line-376"></a><span class='hs-definition'>loadGifByteString</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>onByteStringData</span> <span class='hs-varid'>loadGifData</span>
<a name="line-377"></a>
<a name="line-378"></a>
<a name="line-379"></a><a name="loadImageFile"></a><span class='hs-definition'>loadImageFile</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>CFILE</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Image</span>
<a name="line-380"></a><span class='hs-definition'>loadImageFile</span> <span class='hs-varid'>f</span> <span class='hs-varid'>file</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-381"></a>    <span class='hs-varid'>p</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>throwIfNull</span> <span class='hs-layout'>(</span><span class='hs-str'>"Loading image from "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>file</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>withCFILE</span> <span class='hs-varid'>file</span> <span class='hs-str'>"rb"</span> <span class='hs-varid'>f</span>
<a name="line-382"></a>    <span class='hs-varid'>mkImage</span> <span class='hs-varid'>p</span>
<a name="line-383"></a>
<a name="line-384"></a><a name="loadImageData"></a><span class='hs-definition'>loadImageData</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Image</span>
<a name="line-385"></a><span class='hs-definition'>loadImageData</span> <span class='hs-varid'>f</span> <span class='hs-varid'>sz</span> <span class='hs-varid'>buf</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-386"></a>    <span class='hs-varid'>p</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>throwIfNull</span> <span class='hs-layout'>(</span><span class='hs-str'>"Loading image"</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>sz</span><span class='hs-layout'>)</span> <span class='hs-varid'>buf</span>
<a name="line-387"></a>    <span class='hs-varid'>mkImage</span> <span class='hs-varid'>p</span>
<a name="line-388"></a>
<a name="line-389"></a><a name="onByteStringData"></a><span class='hs-definition'>onByteStringData</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span>
<a name="line-390"></a><span class='hs-definition'>onByteStringData</span> <span class='hs-varid'>f</span> <span class='hs-varid'>bstr</span> <span class='hs-keyglyph'>=</span>
<a name="line-391"></a>    <span class='hs-keyword'>case</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>toForeignPtr</span> <span class='hs-varid'>bstr</span> <span class='hs-keyword'>of</span>
<a name="line-392"></a>      <span class='hs-layout'>(</span><span class='hs-varid'>fptr</span><span class='hs-layout'>,</span> <span class='hs-varid'>start</span><span class='hs-layout'>,</span> <span class='hs-varid'>sz</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>fptr</span> <span class='hs-varop'>$</span>
<a name="line-393"></a>                           <span class='hs-keyglyph'>\</span><span class='hs-varid'>ptr</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>f</span> <span class='hs-varid'>sz</span> <span class='hs-layout'>(</span><span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>plusPtr</span> <span class='hs-varid'>ptr</span> <span class='hs-varid'>start</span><span class='hs-layout'>)</span>
<a name="line-394"></a>
<a name="line-395"></a><span class='hs-comment'>--</span>
<a name="line-396"></a><span class='hs-comment'>-- * Saving images</span>
<a name="line-397"></a><span class='hs-comment'>--</span>
<a name="line-398"></a>
<a name="line-399"></a><a name="saveJpegFile"></a><span class='hs-comment'>-- | Save an image as a JPEG file.</span>
<a name="line-400"></a><span class='hs-definition'>saveJpegFile</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-comment'>-- ^ quality: 0-95, or negative for default quality.</span>
<a name="line-401"></a>             <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Image</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-402"></a><span class='hs-definition'>saveJpegFile</span> <span class='hs-varid'>q</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>saveImageFile</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>gdImageJpeg</span> <span class='hs-varid'>p</span> <span class='hs-varid'>h</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>q</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-403"></a>
<a name="line-404"></a><a name="saveJpegByteString"></a><span class='hs-comment'>-- | Write a JPEG format ByteString of an image.</span>
<a name="line-405"></a><span class='hs-definition'>saveJpegByteString</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Image</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span>
<a name="line-406"></a><span class='hs-definition'>saveJpegByteString</span> <span class='hs-varid'>q</span> <span class='hs-keyglyph'>=</span>
<a name="line-407"></a>  <span class='hs-varid'>saveImageByteString</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>gdImageJpegPtr</span> <span class='hs-varid'>p</span> <span class='hs-varid'>h</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>q</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-408"></a>
<a name="line-409"></a>
<a name="line-410"></a><a name="savePngFile"></a><span class='hs-comment'>-- | Save an image as a PNG file.</span>
<a name="line-411"></a><span class='hs-definition'>savePngFile</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Image</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-412"></a><span class='hs-definition'>savePngFile</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>saveImageFile</span> <span class='hs-varid'>gdImagePng</span>
<a name="line-413"></a>
<a name="line-414"></a><a name="savePngByteString"></a><span class='hs-comment'>-- | Write a PNG format ByteString of an image.</span>
<a name="line-415"></a><span class='hs-definition'>savePngByteString</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Image</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span>
<a name="line-416"></a><span class='hs-definition'>savePngByteString</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>saveImageByteString</span> <span class='hs-varid'>gdImagePngPtr</span>
<a name="line-417"></a>
<a name="line-418"></a>
<a name="line-419"></a><a name="saveGifFile"></a><span class='hs-comment'>-- | Save an image as a GIF file.</span>
<a name="line-420"></a><span class='hs-definition'>saveGifFile</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Image</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-421"></a><span class='hs-definition'>saveGifFile</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>saveImageFile</span> <span class='hs-varid'>gdImageGif</span>
<a name="line-422"></a>
<a name="line-423"></a><a name="saveGifByteString"></a><span class='hs-comment'>-- | Write a GIF format ByteString of an image.</span>
<a name="line-424"></a><span class='hs-definition'>saveGifByteString</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Image</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span>
<a name="line-425"></a><span class='hs-definition'>saveGifByteString</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>saveImageByteString</span> <span class='hs-varid'>gdImageGifPtr</span>
<a name="line-426"></a>
<a name="line-427"></a><a name="saveImageFile"></a><span class='hs-definition'>saveImageFile</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>CFILE</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span> 
<a name="line-428"></a>                 <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Image</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-429"></a><span class='hs-definition'>saveImageFile</span> <span class='hs-varid'>f</span> <span class='hs-varid'>file</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withImagePtr</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>withCFILE</span> <span class='hs-varid'>file</span> <span class='hs-str'>"wb"</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-430"></a>
<a name="line-431"></a><a name="saveImageByteString"></a><span class='hs-definition'>saveImageByteString</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Image</span>
<a name="line-432"></a>                       <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-layout'>)</span>
<a name="line-433"></a><span class='hs-definition'>saveImageByteString</span> <span class='hs-varid'>f</span> <span class='hs-varid'>img</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withImagePtr</span> <span class='hs-varid'>img</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>dataByteString</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-434"></a>
<a name="line-435"></a><a name="dataByteString"></a><span class='hs-definition'>dataByteString</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span>
<a name="line-436"></a><span class='hs-definition'>dataByteString</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>alloca</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>szPtr</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-keyword'>do</span>
<a name="line-437"></a>    <span class='hs-varid'>datPtr</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>f</span> <span class='hs-varid'>szPtr</span> <span class='hs-varop'>&gt;&gt;=</span> <span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>newForeignPtr</span> <span class='hs-varid'>gdFree</span> <span class='hs-varop'>.</span> <span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>castPtr</span>
<a name="line-438"></a>    <span class='hs-varid'>liftM</span> <span class='hs-layout'>(</span><span class='hs-conid'>B</span><span class='hs-varop'>.</span><span class='hs-varid'>fromForeignPtr</span> <span class='hs-varid'>datPtr</span> <span class='hs-num'>0</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fromIntegral</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>peek</span> <span class='hs-varid'>szPtr</span><span class='hs-layout'>)</span>
<a name="line-439"></a>                  
<a name="line-440"></a><span class='hs-comment'>--</span>
<a name="line-441"></a><span class='hs-comment'>-- * Querying</span>
<a name="line-442"></a><span class='hs-comment'>--</span>
<a name="line-443"></a>                                       
<a name="line-444"></a><a name="getPixel"></a><span class='hs-comment'>-- | Retrieves the color index or the color values of a particular pixel.</span>
<a name="line-445"></a><span class='hs-definition'>getPixel</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Int</span><span class='hs-layout'>,</span><span class='hs-conid'>Int</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Image</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Color</span>
<a name="line-446"></a><span class='hs-definition'>getPixel</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withImagePtr</span> <span class='hs-varid'>i</span> <span class='hs-varid'>f</span>
<a name="line-447"></a>    <span class='hs-keyword'>where</span> <span class='hs-varid'>f</span> <span class='hs-varid'>p'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>gdImageGetPixel</span> <span class='hs-varid'>p'</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span>
<a name="line-448"></a>                     
<a name="line-449"></a><span class='hs-comment'>--</span>
<a name="line-450"></a><span class='hs-comment'>-- * Getting information about images.</span>
<a name="line-451"></a><span class='hs-comment'>--</span>
<a name="line-452"></a>
<a name="line-453"></a><a name="imageSize"></a><span class='hs-comment'>-- | Get the size of an image.</span>
<a name="line-454"></a><span class='hs-definition'>imageSize</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Image</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Int</span><span class='hs-layout'>,</span><span class='hs-conid'>Int</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- ^ (width, height)</span>
<a name="line-455"></a><span class='hs-definition'>imageSize</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>liftM</span> <span class='hs-varid'>f</span> <span class='hs-varop'>$</span> <span class='hs-varid'>withImagePtr</span> <span class='hs-varid'>i</span> <span class='hs-varid'>imageSize_</span>
<a name="line-456"></a>    <span class='hs-keyword'>where</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span> <span class='hs-layout'>(</span><span class='hs-varid'>w</span><span class='hs-layout'>,</span><span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>w</span><span class='hs-layout'>,</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-457"></a>
<a name="line-458"></a><a name="imageSize_"></a><span class='hs-definition'>imageSize_</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>CInt</span><span class='hs-layout'>,</span><span class='hs-conid'>CInt</span><span class='hs-layout'>)</span>
<a name="line-459"></a><span class='hs-definition'>imageSize_</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>w</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>hsc_ptr</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>peekByteOff</span> <span class='hs-varid'>hsc_ptr</span> <span class='hs-num'>8</span><span class='hs-layout'>)</span> <span class='hs-varid'>p</span>
<a name="line-460"></a><span class='hs-comment'>{-# LINE 455 "Graphics/GD.hsc" #-}</span>
<a name="line-461"></a>                  <span class='hs-varid'>h</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>hsc_ptr</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>peekByteOff</span> <span class='hs-varid'>hsc_ptr</span> <span class='hs-num'>12</span><span class='hs-layout'>)</span> <span class='hs-varid'>p</span>
<a name="line-462"></a><span class='hs-comment'>{-# LINE 456 "Graphics/GD.hsc" #-}</span>
<a name="line-463"></a>                  <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>w</span><span class='hs-layout'>,</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span>
<a name="line-464"></a>
<a name="line-465"></a><span class='hs-comment'>--</span>
<a name="line-466"></a><span class='hs-comment'>-- * Transforming images.</span>
<a name="line-467"></a><span class='hs-comment'>--</span>
<a name="line-468"></a>
<a name="line-469"></a><a name="resizeImage"></a><span class='hs-comment'>-- | Resize an image to a give size.</span>
<a name="line-470"></a><span class='hs-definition'>resizeImage</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-comment'>-- ^ width in pixels of output image</span>
<a name="line-471"></a>            <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Int</span> <span class='hs-comment'>-- ^ height in pixels of output image</span>
<a name="line-472"></a>            <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Image</span> 
<a name="line-473"></a>            <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Image</span>
<a name="line-474"></a><span class='hs-definition'>resizeImage</span> <span class='hs-varid'>w</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withImagePtr</span> <span class='hs-varid'>i</span> <span class='hs-varid'>f</span>
<a name="line-475"></a>    <span class='hs-keyword'>where</span> 
<a name="line-476"></a>      <span class='hs-varid'>f</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>outW</span><span class='hs-layout'>,</span><span class='hs-varid'>outH</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>w</span><span class='hs-layout'>,</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span>
<a name="line-477"></a>               <span class='hs-layout'>(</span><span class='hs-varid'>inW</span><span class='hs-layout'>,</span> <span class='hs-varid'>inH</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>imageSize_</span> <span class='hs-varid'>p</span>
<a name="line-478"></a>               <span class='hs-varid'>onNewImage</span> <span class='hs-varid'>outW</span> <span class='hs-varid'>outH</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p'</span> <span class='hs-keyglyph'>-&gt;</span> 
<a name="line-479"></a>                   <span class='hs-varid'>gdImageCopyResampled</span> <span class='hs-varid'>p'</span> <span class='hs-varid'>p</span> <span class='hs-num'>0</span> <span class='hs-num'>0</span> <span class='hs-num'>0</span> <span class='hs-num'>0</span> <span class='hs-varid'>outW</span> <span class='hs-varid'>outH</span> <span class='hs-varid'>inW</span> <span class='hs-varid'>inH</span>
<a name="line-480"></a>
<a name="line-481"></a><a name="rotateImage"></a><span class='hs-comment'>-- | Rotate an image by a multiple of 90 degrees counter-clockwise.</span>
<a name="line-482"></a><span class='hs-definition'>rotateImage</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-comment'>-- ^ 1 for 90 degrees counter-clockwise, </span>
<a name="line-483"></a>                   <span class='hs-comment'>-- 2 for 180 degrees, etc.</span>
<a name="line-484"></a>            <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Image</span> 
<a name="line-485"></a>            <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Image</span>
<a name="line-486"></a><span class='hs-definition'>rotateImage</span> <span class='hs-varid'>r</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withImagePtr</span> <span class='hs-varid'>i</span> <span class='hs-varid'>f</span>
<a name="line-487"></a>    <span class='hs-keyword'>where</span> <span class='hs-varid'>f</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-layout'>(</span><span class='hs-varid'>inW</span><span class='hs-layout'>,</span><span class='hs-varid'>inH</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>imageSize_</span> <span class='hs-varid'>p</span>
<a name="line-488"></a>                   <span class='hs-keyword'>let</span> <span class='hs-varid'>q</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-layout'>(</span><span class='hs-varid'>r</span> <span class='hs-varop'>`mod`</span> <span class='hs-num'>4</span><span class='hs-layout'>)</span>
<a name="line-489"></a>                       <span class='hs-layout'>(</span><span class='hs-varid'>outW</span><span class='hs-layout'>,</span><span class='hs-varid'>outH</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>r</span> <span class='hs-varop'>`mod`</span> <span class='hs-num'>2</span> <span class='hs-varop'>==</span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>inW</span><span class='hs-layout'>,</span><span class='hs-varid'>inH</span><span class='hs-layout'>)</span> 
<a name="line-490"></a>                                   <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span>      <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>inH</span><span class='hs-layout'>,</span><span class='hs-varid'>inW</span><span class='hs-layout'>)</span>
<a name="line-491"></a>                       <span class='hs-varid'>srcX</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>q</span> <span class='hs-varop'>==</span> <span class='hs-num'>1</span> <span class='hs-varop'>||</span> <span class='hs-varid'>q</span> <span class='hs-varop'>==</span> <span class='hs-num'>2</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>inW</span><span class='hs-comment'>-</span><span class='hs-num'>1</span> <span class='hs-keyword'>else</span> <span class='hs-num'>0</span><span class='hs-layout'>;</span>
<a name="line-492"></a>                       <span class='hs-varid'>srcY</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>q</span> <span class='hs-varop'>==</span> <span class='hs-num'>2</span> <span class='hs-varop'>||</span> <span class='hs-varid'>q</span> <span class='hs-varop'>==</span> <span class='hs-num'>3</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>inH</span><span class='hs-comment'>-</span><span class='hs-num'>1</span> <span class='hs-keyword'>else</span> <span class='hs-num'>0</span><span class='hs-layout'>;</span>
<a name="line-493"></a>                   <span class='hs-varid'>onNewImage</span> <span class='hs-varid'>outW</span> <span class='hs-varid'>outH</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>p'</span> <span class='hs-keyglyph'>-&gt;</span>
<a name="line-494"></a>                       <span class='hs-varid'>gdImageCopyRotated90</span> <span class='hs-varid'>p'</span> <span class='hs-varid'>p</span> <span class='hs-num'>0</span> <span class='hs-num'>0</span> <span class='hs-varid'>srcX</span> <span class='hs-varid'>srcY</span> <span class='hs-varid'>inW</span> <span class='hs-varid'>inH</span> <span class='hs-varid'>q</span><span class='hs-layout'>)</span>
<a name="line-495"></a>
<a name="line-496"></a><span class='hs-comment'>--</span>
<a name="line-497"></a><span class='hs-comment'>-- * Drawing</span>
<a name="line-498"></a><span class='hs-comment'>--</span>
<a name="line-499"></a>
<a name="line-500"></a><a name="brushed"></a><span class='hs-comment'>-- | Special character for gdBrushed</span>
<a name="line-501"></a><span class='hs-definition'>brushed</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>PCREOption</span>
<a name="line-502"></a><span class='hs-definition'>brushed</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PCREOption</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-num'>3</span><span class='hs-layout'>)</span>
<a name="line-503"></a><span class='hs-comment'>{-# LINE 496 "Graphics/GD.hsc" #-}</span>
<a name="line-504"></a>
<a name="line-505"></a><a name="setBrush"></a><span class='hs-comment'>-- | Set an @Image@ as a brush for an @Image@</span>
<a name="line-506"></a><span class='hs-definition'>setBrush</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Image</span> <span class='hs-comment'>-- ^ Source image</span>
<a name="line-507"></a>         <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Image</span> <span class='hs-comment'>-- ^ Brush</span>
<a name="line-508"></a>         <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-509"></a><span class='hs-definition'>setBrush</span> <span class='hs-varid'>i</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=</span> 
<a name="line-510"></a>    <span class='hs-varid'>withImagePtr</span> <span class='hs-varid'>b</span> <span class='hs-varop'>$</span>
<a name="line-511"></a>    <span class='hs-keyglyph'>\</span><span class='hs-varid'>brushImg</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>withImagePtr</span> <span class='hs-varid'>i</span> <span class='hs-varop'>$</span>
<a name="line-512"></a>    <span class='hs-keyglyph'>\</span><span class='hs-varid'>srcImg</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>gdImageSetBrush</span> <span class='hs-varid'>srcImg</span> <span class='hs-varid'>brushImg</span>
<a name="line-513"></a>
<a name="line-514"></a><a name="fillImage"></a><span class='hs-comment'>-- | Fill the entire image with the given color.</span>
<a name="line-515"></a><span class='hs-definition'>fillImage</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Color</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Image</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-516"></a><span class='hs-definition'>fillImage</span> <span class='hs-varid'>c</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>sz</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>imageSize</span> <span class='hs-varid'>i</span>
<a name="line-517"></a>                   <span class='hs-varid'>drawFilledRectangle</span> <span class='hs-layout'>(</span><span class='hs-num'>0</span><span class='hs-layout'>,</span><span class='hs-num'>0</span><span class='hs-layout'>)</span> <span class='hs-varid'>sz</span> <span class='hs-varid'>c</span> <span class='hs-varid'>i</span>
<a name="line-518"></a>
<a name="line-519"></a><a name="drawFilledRectangle"></a><span class='hs-definition'>drawFilledRectangle</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Point</span> <span class='hs-comment'>-- ^ Upper left corner</span>
<a name="line-520"></a>                    <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Point</span> <span class='hs-comment'>-- ^ Lower right corner</span>
<a name="line-521"></a>                    <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Color</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Image</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-522"></a><span class='hs-definition'>drawFilledRectangle</span> <span class='hs-layout'>(</span><span class='hs-varid'>x1</span><span class='hs-layout'>,</span><span class='hs-varid'>y1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>x2</span><span class='hs-layout'>,</span><span class='hs-varid'>y2</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span>
<a name="line-523"></a>    <span class='hs-varid'>withImagePtr</span> <span class='hs-varid'>i</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-&gt;</span> 
<a name="line-524"></a>        <span class='hs-varid'>gdImageFilledRectangle</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>x1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>y1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>x2</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>y2</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span>
<a name="line-525"></a>
<a name="line-526"></a><a name="drawFilledEllipse"></a><span class='hs-definition'>drawFilledEllipse</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Point</span> <span class='hs-comment'>-- ^ Center</span>
<a name="line-527"></a>                  <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Size</span>  <span class='hs-comment'>-- ^ Width and height</span>
<a name="line-528"></a>                  <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Color</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Image</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-529"></a><span class='hs-definition'>drawFilledEllipse</span> <span class='hs-layout'>(</span><span class='hs-varid'>cx</span><span class='hs-layout'>,</span><span class='hs-varid'>cy</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>w</span><span class='hs-layout'>,</span><span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span>
<a name="line-530"></a>    <span class='hs-varid'>withImagePtr</span> <span class='hs-varid'>i</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-&gt;</span> 
<a name="line-531"></a>        <span class='hs-varid'>gdImageFilledEllipse</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>cx</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>cy</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span>
<a name="line-532"></a>
<a name="line-533"></a><a name="drawLine"></a><span class='hs-definition'>drawLine</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Point</span> <span class='hs-comment'>-- ^ Start</span>
<a name="line-534"></a>         <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Point</span> <span class='hs-comment'>-- ^ End</span>
<a name="line-535"></a>         <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Color</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Image</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-536"></a><span class='hs-definition'>drawLine</span> <span class='hs-layout'>(</span><span class='hs-varid'>x1</span><span class='hs-layout'>,</span><span class='hs-varid'>y1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>x2</span><span class='hs-layout'>,</span><span class='hs-varid'>y2</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span>
<a name="line-537"></a>    <span class='hs-varid'>withImagePtr</span> <span class='hs-varid'>i</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-&gt;</span>
<a name="line-538"></a>        <span class='hs-varid'>gdImageLine</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>x1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>y1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>x2</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>y2</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span>
<a name="line-539"></a>
<a name="line-540"></a><a name="drawArc"></a><span class='hs-definition'>drawArc</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Point</span> <span class='hs-comment'>-- ^ Center</span>
<a name="line-541"></a>        <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Size</span>  <span class='hs-comment'>-- ^ Width and height</span>
<a name="line-542"></a>        <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Int</span>   <span class='hs-comment'>-- ^ Starting position (degrees)</span>
<a name="line-543"></a>        <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Int</span>   <span class='hs-comment'>-- ^ Ending position (degrees)</span>
<a name="line-544"></a>        <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Color</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Image</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-545"></a><span class='hs-definition'>drawArc</span> <span class='hs-layout'>(</span><span class='hs-varid'>cx</span><span class='hs-layout'>,</span><span class='hs-varid'>cy</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>w</span><span class='hs-layout'>,</span><span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>sp</span> <span class='hs-varid'>ep</span> <span class='hs-varid'>c</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span>
<a name="line-546"></a>    <span class='hs-varid'>withImagePtr</span> <span class='hs-varid'>i</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-&gt;</span>
<a name="line-547"></a>        <span class='hs-varid'>gdImageArc</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>cx</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>cy</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>sp</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>ep</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span>
<a name="line-548"></a>
<a name="line-549"></a><a name="antiAliased"></a><span class='hs-comment'>-- | Use anti-aliasing when performing the given drawing function.</span>
<a name="line-550"></a><span class='hs-comment'>--   This can cause a segault with some gd versions.</span>
<a name="line-551"></a><span class='hs-definition'>antiAliased</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Color</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Image</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Color</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Image</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span>
<a name="line-552"></a><span class='hs-definition'>antiAliased</span> <span class='hs-varid'>f</span> <span class='hs-varid'>c</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> 
<a name="line-553"></a>    <span class='hs-keyword'>do</span> <span class='hs-varid'>withImagePtr</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>gdImageSetAntiAliased</span> <span class='hs-varid'>p</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-554"></a>       <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-num'>7</span><span class='hs-layout'>)</span> <span class='hs-varid'>i</span>
<a name="line-555"></a><span class='hs-comment'>{-# LINE 547 "Graphics/GD.hsc" #-}</span>
<a name="line-556"></a>
<a name="line-557"></a><a name="setPixel"></a><span class='hs-definition'>setPixel</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Point</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Color</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Image</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-558"></a><span class='hs-definition'>setPixel</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span>
<a name="line-559"></a>    <span class='hs-varid'>withImagePtr</span> <span class='hs-varid'>i</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-&gt;</span>
<a name="line-560"></a>        <span class='hs-varid'>gdImageSetPixel</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span>
<a name="line-561"></a>
<a name="line-562"></a><a name="colorAllocate"></a><span class='hs-definition'>colorAllocate</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Image</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Color</span>
<a name="line-563"></a><span class='hs-definition'>colorAllocate</span> <span class='hs-varid'>r</span> <span class='hs-varid'>g</span> <span class='hs-varid'>b</span> <span class='hs-varid'>a</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span>
<a name="line-564"></a>    <span class='hs-varid'>withImagePtr</span> <span class='hs-varid'>i</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-&gt;</span>
<a name="line-565"></a>        <span class='hs-varid'>gdImageColorAllocate</span> <span class='hs-varid'>p</span> <span class='hs-varid'>r</span> <span class='hs-varid'>g</span> <span class='hs-varid'>b</span> <span class='hs-varid'>a</span>
<a name="line-566"></a>
<a name="line-567"></a><span class='hs-comment'>--</span>
<a name="line-568"></a><span class='hs-comment'>-- * Text</span>
<a name="line-569"></a><span class='hs-comment'>--</span>
<a name="line-570"></a>
<a name="line-571"></a><a name="useFontConfig"></a><span class='hs-comment'>-- | Globally switch from using font file names to fontconfig paths</span>
<a name="line-572"></a><span class='hs-comment'>-- | for fonts in drawString (and measureString).</span>
<a name="line-573"></a><span class='hs-definition'>useFontConfig</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Bool</span>
<a name="line-574"></a><span class='hs-definition'>useFontConfig</span> <span class='hs-varid'>use</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>liftM</span> <span class='hs-layout'>(</span><span class='hs-varop'>/=</span> <span class='hs-num'>0</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>gdFTUseFontConfig</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>use</span> <span class='hs-keyword'>then</span> <span class='hs-num'>1</span> <span class='hs-keyword'>else</span> <span class='hs-num'>0</span>
<a name="line-575"></a>
<a name="line-576"></a><a name="drawString"></a><span class='hs-comment'>-- | Draw a string using the FreeType 2.x library</span>
<a name="line-577"></a><span class='hs-definition'>drawString</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ Font name</span>
<a name="line-578"></a>           <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Double</span> <span class='hs-comment'>-- ^ Font point size</span>
<a name="line-579"></a>           <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Double</span> <span class='hs-comment'>-- ^ Angle in counterclockwise radians</span>
<a name="line-580"></a>           <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Point</span> <span class='hs-comment'>-- ^ Origin</span>
<a name="line-581"></a>           <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ Text, including HTML entities</span>
<a name="line-582"></a>           <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Color</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Image</span>
<a name="line-583"></a>           <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Point</span><span class='hs-layout'>,</span> <span class='hs-conid'>Point</span><span class='hs-layout'>,</span> <span class='hs-conid'>Point</span><span class='hs-layout'>,</span> <span class='hs-conid'>Point</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- ^ Bounding box</span>
<a name="line-584"></a>                                              <span class='hs-comment'>-- of the drawn</span>
<a name="line-585"></a>                                              <span class='hs-comment'>-- text.</span>
<a name="line-586"></a><span class='hs-definition'>drawString</span> <span class='hs-varid'>fontName</span> <span class='hs-varid'>ptSize</span> <span class='hs-varid'>angle</span> <span class='hs-layout'>(</span><span class='hs-varid'>oriX</span><span class='hs-layout'>,</span> <span class='hs-varid'>oriY</span><span class='hs-layout'>)</span> <span class='hs-varid'>txt</span> <span class='hs-varid'>color</span> <span class='hs-varid'>img</span>
<a name="line-587"></a>    <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withImagePtr</span> <span class='hs-varid'>img</span> <span class='hs-varop'>$</span>
<a name="line-588"></a>        <span class='hs-varid'>drawStringImagePtr</span> <span class='hs-varid'>color</span> <span class='hs-varid'>fontName</span> <span class='hs-varid'>ptSize</span> <span class='hs-varid'>angle</span> <span class='hs-layout'>(</span><span class='hs-varid'>oriX</span><span class='hs-layout'>,</span> <span class='hs-varid'>oriY</span><span class='hs-layout'>)</span> <span class='hs-varid'>txt</span>
<a name="line-589"></a>
<a name="line-590"></a><a name="measureString"></a><span class='hs-comment'>-- | Measure a string using the FreeType 2.x library.  This computes</span>
<a name="line-591"></a><span class='hs-comment'>-- the bounding box but does not actually draw the string to any</span>
<a name="line-592"></a><span class='hs-comment'>-- image.</span>
<a name="line-593"></a><span class='hs-definition'>measureString</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ Font name</span>
<a name="line-594"></a>              <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Double</span> <span class='hs-comment'>-- ^ Font point size</span>
<a name="line-595"></a>              <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Double</span> <span class='hs-comment'>-- ^ Angle in counterclockwise radians</span>
<a name="line-596"></a>              <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Point</span> <span class='hs-comment'>-- ^ Origin</span>
<a name="line-597"></a>              <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ Text, including HTML entities</span>
<a name="line-598"></a>              <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Color</span>
<a name="line-599"></a>              <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Point</span><span class='hs-layout'>,</span> <span class='hs-conid'>Point</span><span class='hs-layout'>,</span> <span class='hs-conid'>Point</span><span class='hs-layout'>,</span> <span class='hs-conid'>Point</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- ^ Bounding</span>
<a name="line-600"></a>                                                 <span class='hs-comment'>-- box of the</span>
<a name="line-601"></a>                                                 <span class='hs-comment'>-- drawn text</span>
<a name="line-602"></a><span class='hs-definition'>measureString</span> <span class='hs-varid'>fontName</span> <span class='hs-varid'>ptSize</span> <span class='hs-varid'>angle</span> <span class='hs-layout'>(</span><span class='hs-varid'>oriX</span><span class='hs-layout'>,</span> <span class='hs-varid'>oriY</span><span class='hs-layout'>)</span> <span class='hs-varid'>txt</span> <span class='hs-varid'>color</span>
<a name="line-603"></a>    <span class='hs-keyglyph'>=</span> <span class='hs-varid'>drawStringImagePtr</span> <span class='hs-varid'>color</span> <span class='hs-varid'>fontName</span> <span class='hs-varid'>ptSize</span> <span class='hs-varid'>angle</span> <span class='hs-layout'>(</span><span class='hs-varid'>oriX</span><span class='hs-layout'>,</span> <span class='hs-varid'>oriY</span><span class='hs-layout'>)</span> <span class='hs-varid'>txt</span> <span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>nullPtr</span>
<a name="line-604"></a>
<a name="line-605"></a><a name="drawStringImagePtr"></a><span class='hs-definition'>drawStringImagePtr</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Color</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Double</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Double</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Point</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-&gt;</span>
<a name="line-606"></a>                      <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GDImage</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Point</span><span class='hs-layout'>,</span> <span class='hs-conid'>Point</span><span class='hs-layout'>,</span> <span class='hs-conid'>Point</span><span class='hs-layout'>,</span> <span class='hs-conid'>Point</span><span class='hs-layout'>)</span>
<a name="line-607"></a><span class='hs-definition'>drawStringImagePtr</span> <span class='hs-varid'>color</span> <span class='hs-varid'>fontName</span> <span class='hs-varid'>ptSize</span> <span class='hs-varid'>angle</span> <span class='hs-layout'>(</span><span class='hs-varid'>oriX</span><span class='hs-layout'>,</span> <span class='hs-varid'>oriY</span><span class='hs-layout'>)</span> <span class='hs-varid'>txt</span> <span class='hs-varid'>imgPtr</span>
<a name="line-608"></a>    <span class='hs-keyglyph'>=</span> <span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>allocaArray</span> <span class='hs-num'>8</span> <span class='hs-varop'>$</span>
<a name="line-609"></a>      <span class='hs-keyglyph'>\</span><span class='hs-varid'>bboxPtr</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>withCAString</span> <span class='hs-varid'>fontName</span> <span class='hs-varop'>$</span>
<a name="line-610"></a>      <span class='hs-keyglyph'>\</span><span class='hs-varid'>cFontName</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>withCAString</span> <span class='hs-varid'>txt</span> <span class='hs-varop'>$</span>
<a name="line-611"></a>      <span class='hs-keyglyph'>\</span><span class='hs-varid'>cTxt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>res</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>gdImageStringFT</span> <span class='hs-varid'>imgPtr</span> <span class='hs-varid'>bboxPtr</span> <span class='hs-varid'>color</span> <span class='hs-varid'>cFontName</span>
<a name="line-612"></a>                                         <span class='hs-layout'>(</span><span class='hs-varid'>double</span> <span class='hs-varid'>ptSize</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>double</span> <span class='hs-varid'>angle</span><span class='hs-layout'>)</span>
<a name="line-613"></a>                                         <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>oriX</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>oriY</span><span class='hs-layout'>)</span> <span class='hs-varid'>cTxt</span>
<a name="line-614"></a>                  <span class='hs-keyword'>if</span> <span class='hs-varid'>res</span> <span class='hs-varop'>==</span> <span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>nullPtr</span>
<a name="line-615"></a>                     <span class='hs-keyword'>then</span> <span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>peekArray</span> <span class='hs-num'>8</span> <span class='hs-varid'>bboxPtr</span> <span class='hs-varop'>&gt;&gt;=</span> <span class='hs-varid'>parseBBox</span>
<a name="line-616"></a>                     <span class='hs-keyword'>else</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>peekCAString</span> <span class='hs-varid'>res</span> <span class='hs-varop'>&gt;&gt;=</span> <span class='hs-varid'>ioError</span> <span class='hs-varop'>.</span> <span class='hs-varid'>userError</span>
<a name="line-617"></a>    <span class='hs-keyword'>where</span> <span class='hs-varid'>parseBBox</span> <span class='hs-varid'>l</span> <span class='hs-keyglyph'>=</span>
<a name="line-618"></a>            <span class='hs-keyword'>case</span> <span class='hs-varid'>map</span> <span class='hs-varid'>int</span> <span class='hs-varid'>l</span> <span class='hs-keyword'>of</span>
<a name="line-619"></a>              <span class='hs-keyglyph'>[</span><span class='hs-varid'>llx</span><span class='hs-layout'>,</span> <span class='hs-varid'>lly</span><span class='hs-layout'>,</span> <span class='hs-varid'>lrx</span><span class='hs-layout'>,</span> <span class='hs-varid'>lry</span><span class='hs-layout'>,</span> <span class='hs-varid'>urx</span><span class='hs-layout'>,</span> <span class='hs-varid'>ury</span><span class='hs-layout'>,</span> <span class='hs-varid'>ulx</span><span class='hs-layout'>,</span> <span class='hs-varid'>uly</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-&gt;</span>
<a name="line-620"></a>                <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>llx</span><span class='hs-layout'>,</span> <span class='hs-varid'>lly</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varid'>lrx</span><span class='hs-layout'>,</span> <span class='hs-varid'>lry</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varid'>urx</span><span class='hs-layout'>,</span> <span class='hs-varid'>ury</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varid'>ulx</span><span class='hs-layout'>,</span> <span class='hs-varid'>uly</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-621"></a>              <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>ioError</span> <span class='hs-varop'>$</span> <span class='hs-varid'>userError</span> <span class='hs-varop'>$</span>
<a name="line-622"></a>                     <span class='hs-str'>"parseBBox with /= 8 elements: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>l</span>
<a name="line-623"></a>
<a name="line-624"></a><a name="drawStringCircle"></a><span class='hs-comment'>-- | Draw strings around the top and bottom of a torus</span>
<a name="line-625"></a><span class='hs-definition'>drawStringCircle</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Point</span> <span class='hs-comment'>-- ^ Center of text path circle</span>
<a name="line-626"></a>                 <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Double</span> <span class='hs-comment'>-- ^ Outer radius of text</span>
<a name="line-627"></a>                 <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Double</span> <span class='hs-comment'>-- ^ Fraction of radius occupied by text</span>
<a name="line-628"></a>                 <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Double</span> <span class='hs-comment'>-- ^ Portion of circle arc filled by text</span>
<a name="line-629"></a>                 <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ Font name</span>
<a name="line-630"></a>                 <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Double</span> <span class='hs-comment'>-- ^ Font size hint</span>
<a name="line-631"></a>                 <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ Text to write on the top of the circle</span>
<a name="line-632"></a>                 <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ Text to write on the bottom of the circle</span>
<a name="line-633"></a>                 <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Color</span> <span class='hs-comment'>-- ^ Text color</span>
<a name="line-634"></a>                 <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Image</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-635"></a><span class='hs-definition'>drawStringCircle</span> <span class='hs-layout'>(</span><span class='hs-varid'>ctrX</span><span class='hs-layout'>,</span> <span class='hs-varid'>ctrY</span><span class='hs-layout'>)</span> <span class='hs-varid'>rad</span> <span class='hs-varid'>textRad</span> <span class='hs-varid'>textFill</span> <span class='hs-varid'>fontName</span>
<a name="line-636"></a>                 <span class='hs-varid'>fontSize</span> <span class='hs-varid'>topTxt</span> <span class='hs-varid'>bottomTxt</span> <span class='hs-varid'>color</span> <span class='hs-varid'>img</span>
<a name="line-637"></a>    <span class='hs-keyglyph'>=</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>withCAString</span> <span class='hs-varid'>fontName</span> <span class='hs-varop'>$</span> 
<a name="line-638"></a>      <span class='hs-keyglyph'>\</span><span class='hs-varid'>cFontName</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>withCAString</span> <span class='hs-varid'>topTxt</span> <span class='hs-varop'>$</span>
<a name="line-639"></a>      <span class='hs-keyglyph'>\</span><span class='hs-varid'>cTopTxt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>withCAString</span> <span class='hs-varid'>bottomTxt</span> <span class='hs-varop'>$</span> 
<a name="line-640"></a>      <span class='hs-keyglyph'>\</span><span class='hs-varid'>cBottomTxt</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>withImagePtr</span> <span class='hs-varid'>img</span> <span class='hs-varop'>$</span> 
<a name="line-641"></a>      <span class='hs-keyglyph'>\</span><span class='hs-varid'>imgPtr</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-keyword'>do</span>
<a name="line-642"></a>        <span class='hs-varid'>res</span> <span class='hs-keyglyph'>&lt;-</span> <span class='hs-varid'>gdImageStringFTCircle</span> <span class='hs-varid'>imgPtr</span>
<a name="line-643"></a>                   <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>ctrX</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>ctrY</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>double</span> <span class='hs-varid'>rad</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>double</span> <span class='hs-varid'>textRad</span><span class='hs-layout'>)</span>
<a name="line-644"></a>                   <span class='hs-layout'>(</span><span class='hs-varid'>double</span> <span class='hs-varid'>textFill</span><span class='hs-layout'>)</span> <span class='hs-varid'>cFontName</span> <span class='hs-layout'>(</span><span class='hs-varid'>double</span> <span class='hs-varid'>fontSize</span><span class='hs-layout'>)</span>
<a name="line-645"></a>                   <span class='hs-varid'>cTopTxt</span> <span class='hs-varid'>cBottomTxt</span>  <span class='hs-varid'>color</span>                    
<a name="line-646"></a>        <span class='hs-varid'>unless</span> <span class='hs-layout'>(</span><span class='hs-varid'>res</span> <span class='hs-varop'>==</span> <span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>nullPtr</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>peekCAString</span> <span class='hs-varid'>res</span> <span class='hs-varop'>&gt;&gt;=</span> <span class='hs-varid'>ioError</span> <span class='hs-varop'>.</span> <span class='hs-varid'>userError</span><span class='hs-layout'>)</span>
<a name="line-647"></a>
<a name="line-648"></a><a name="saveAlpha"></a><span class='hs-definition'>saveAlpha</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Image</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-649"></a><span class='hs-definition'>saveAlpha</span> <span class='hs-varid'>b</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withImagePtr</span> <span class='hs-varid'>i</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>gdImageSaveAlpha</span> <span class='hs-varid'>p</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>b</span> <span class='hs-keyword'>then</span> <span class='hs-num'>1</span> <span class='hs-keyword'>else</span> <span class='hs-num'>0</span>
<a name="line-650"></a>
<a name="line-651"></a><a name="alphaBlending"></a><span class='hs-definition'>alphaBlending</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Image</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-652"></a><span class='hs-definition'>alphaBlending</span> <span class='hs-varid'>b</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withImagePtr</span> <span class='hs-varid'>i</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>p</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>gdImageAlphaBlending</span> <span class='hs-varid'>p</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>b</span> <span class='hs-keyword'>then</span> <span class='hs-num'>1</span> <span class='hs-keyword'>else</span> <span class='hs-num'>0</span>
<a name="line-653"></a>
<a name="line-654"></a><span class='hs-comment'>--</span>
<a name="line-655"></a><span class='hs-comment'>-- * Colors</span>
<a name="line-656"></a><span class='hs-comment'>--</span>
<a name="line-657"></a>
<a name="line-658"></a><a name="rgb"></a><span class='hs-definition'>rgb</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-comment'>-- ^ Red (0-255)</span>
<a name="line-659"></a>         <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Int</span> <span class='hs-comment'>-- ^ Green (0-255)</span>
<a name="line-660"></a>         <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Int</span> <span class='hs-comment'>-- ^ Blue (0-255)</span>
<a name="line-661"></a>         <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Color</span>
<a name="line-662"></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-varid'>rgba</span> <span class='hs-varid'>r</span> <span class='hs-varid'>g</span> <span class='hs-varid'>b</span> <span class='hs-num'>0</span>
<a name="line-663"></a>
<a name="line-664"></a><a name="rgba"></a><span class='hs-definition'>rgba</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-comment'>-- ^ Red (0-255)</span>
<a name="line-665"></a>          <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Int</span> <span class='hs-comment'>-- ^ Green (0-255)</span>
<a name="line-666"></a>          <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Int</span> <span class='hs-comment'>-- ^ Blue (0-255)</span>
<a name="line-667"></a>          <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Int</span> <span class='hs-comment'>-- ^ Alpha (0-127), 0 is opaque, 127 is transparent</span>
<a name="line-668"></a>          <span class='hs-keyglyph'>-&gt;</span> <span class='hs-conid'>Color</span>
<a name="line-669"></a><span class='hs-definition'>rgba</span> <span class='hs-varid'>r</span> <span class='hs-varid'>g</span> <span class='hs-varid'>b</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> 
<a name="line-670"></a>    <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>a</span> <span class='hs-varop'>`</span><span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>shiftL</span><span class='hs-varop'>`</span> <span class='hs-num'>24</span><span class='hs-layout'>)</span> <span class='hs-varop'>.|.</span>
<a name="line-671"></a>    <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>r</span> <span class='hs-varop'>`</span><span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>shiftL</span><span class='hs-varop'>`</span> <span class='hs-num'>16</span><span class='hs-layout'>)</span> <span class='hs-varop'>.|.</span>
<a name="line-672"></a>    <span class='hs-layout'>(</span><span class='hs-varid'>int</span> <span class='hs-varid'>g</span> <span class='hs-varop'>`</span><span class='hs-conid'>F</span><span class='hs-varop'>.</span><span class='hs-varid'>shiftL</span><span class='hs-varop'>`</span> <span class='hs-num'>8</span><span class='hs-layout'>)</span>  <span class='hs-varop'>.|.</span>
<a name="line-673"></a>    <span class='hs-varid'>int</span> <span class='hs-varid'>b</span>
<a name="line-674"></a>
<a name="line-675"></a>
<a name="line-676"></a><span class='hs-comment'>--</span>
<a name="line-677"></a><span class='hs-comment'>-- * Utilities</span>
<a name="line-678"></a><span class='hs-comment'>--</span>
<a name="line-679"></a>
<a name="line-680"></a><a name="int"></a><span class='hs-definition'>int</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Integral</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Num</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=&gt;</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>b</span>
<a name="line-681"></a><span class='hs-definition'>int</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromIntegral</span>
<a name="line-682"></a>
<a name="line-683"></a><a name="double"></a><span class='hs-definition'>double</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Real</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Fractional</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=&gt;</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-&gt;</span> <span class='hs-varid'>b</span>
<a name="line-684"></a><span class='hs-definition'>double</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>realToFrac</span>
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