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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>Graphics.Rendering.Chart.Backend.Cairo</title><link href="ocean.css" rel="stylesheet" type="text/css" title="Ocean" /><script src="haddock-util.js" type="text/javascript"></script><script src="file:///usr/share/javascript/mathjax/MathJax.js" type="text/javascript"></script><script type="text/javascript">//<![CDATA[
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</script></head><body><div id="package-header"><ul class="links" id="page-menu"><li><a href="src/Graphics-Rendering-Chart-Backend-Cairo.html">Source</a></li><li><a href="index.html">Contents</a></li><li><a href="doc-index.html">Index</a></li></ul><p class="caption">Chart-cairo-1.8.2: Cairo backend for Charts.</p></div><div id="content"><div id="module-header"><table class="info"><tr><th>Safe Haskell</th><td>None</td></tr><tr><th>Language</th><td>Haskell98</td></tr></table><p class="caption">Graphics.Rendering.Chart.Backend.Cairo</p></div><div id="description"><p class="caption">Description</p><div class="doc"><p>The backend to render charts with cairo.</p></div></div><div id="synopsis"><p id="control.syn" class="caption expander" onclick="toggleSection('syn')">Synopsis</p><ul id="section.syn" class="hide" onclick="toggleSection('syn')"><li class="src short"><span class="keyword">data</span> <a href="#t:FileFormat">FileFormat</a><ul class="subs"><li>= <a href="#v:PNG">PNG</a></li><li>| <a href="#v:SVG">SVG</a></li><li>| <a href="#v:PS">PS</a></li><li>| <a href="#v:PDF">PDF</a></li></ul></li><li class="src short"><span class="keyword">data</span> <a href="#t:FileOptions">FileOptions</a> = <a href="#v:FileOptions">FileOptions</a> {<ul class="subs"><li><a href="#v:_fo_size">_fo_size</a> :: (<a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.9.1.0/Data-Int.html#t:Int">Int</a>, <a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.9.1.0/Data-Int.html#t:Int">Int</a>)</li><li><a href="#v:_fo_format">_fo_format</a> :: <a href="Graphics-Rendering-Chart-Backend-Cairo.html#t:FileFormat">FileFormat</a></li></ul>}</li><li class="src short"><a href="#v:runBackend">runBackend</a> :: CEnv -&gt; <a href="file:///usr/share/doc/libghc-chart-doc/html/Graphics-Rendering-Chart-Backend-Impl.html#t:BackendProgram">BackendProgram</a> a -&gt; <a href="file:///usr/share/doc/libghc-cairo-doc/html/Graphics-Rendering-Cairo.html#t:Render">Render</a> a</li><li class="src short"><a href="#v:renderableToFile">renderableToFile</a> :: <a href="Graphics-Rendering-Chart-Backend-Cairo.html#t:FileOptions">FileOptions</a> -&gt; <a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.9.1.0/System-IO.html#t:FilePath">FilePath</a> -&gt; <a href="file:///usr/share/doc/libghc-chart-doc/html/Graphics-Rendering-Chart-Renderable.html#t:Renderable">Renderable</a> a -&gt; <a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.9.1.0/System-IO.html#t:IO">IO</a> (<a href="file:///usr/share/doc/libghc-chart-doc/html/Graphics-Rendering-Chart-Renderable.html#t:PickFn">PickFn</a> a)</li><li class="src short"><a href="#v:toFile">toFile</a> :: (<a href="file:///usr/share/doc/libghc-data-default-class-doc/html/Data-Default-Class.html#t:Default">Default</a> r, <a href="file:///usr/share/doc/libghc-chart-doc/html/Graphics-Rendering-Chart-Renderable.html#t:ToRenderable">ToRenderable</a> r) =&gt; <a href="Graphics-Rendering-Chart-Backend-Cairo.html#t:FileOptions">FileOptions</a> -&gt; <a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.9.1.0/System-IO.html#t:FilePath">FilePath</a> -&gt; <a href="file:///usr/share/doc/libghc-chart-doc/html/Graphics-Rendering-Chart-State.html#t:EC">EC</a> r () -&gt; <a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.9.1.0/System-IO.html#t:IO">IO</a> ()</li><li class="src short"><a href="#v:defaultEnv">defaultEnv</a> :: <a href="file:///usr/share/doc/libghc-chart-doc/html/Graphics-Rendering-Chart-Backend-Types.html#t:AlignmentFns">AlignmentFns</a> -&gt; CEnv</li><li class="src short"><a href="#v:fo_size">fo_size</a> :: <a href="file:///usr/share/doc/libghc-lens-doc/html/Control-Lens-Type.html#t:Lens-39-">Lens'</a> <a href="Graphics-Rendering-Chart-Backend-Cairo.html#t:FileOptions">FileOptions</a> (<a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.9.1.0/Data-Int.html#t:Int">Int</a>, <a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.9.1.0/Data-Int.html#t:Int">Int</a>)</li><li class="src short"><a href="#v:fo_format">fo_format</a> :: <a href="file:///usr/share/doc/libghc-lens-doc/html/Control-Lens-Type.html#t:Lens-39-">Lens'</a> <a href="Graphics-Rendering-Chart-Backend-Cairo.html#t:FileOptions">FileOptions</a> <a href="Graphics-Rendering-Chart-Backend-Cairo.html#t:FileFormat">FileFormat</a></li><li class="src short"><a href="#v:cBackendToFile">cBackendToFile</a> :: <a href="Graphics-Rendering-Chart-Backend-Cairo.html#t:FileOptions">FileOptions</a> -&gt; <a href="file:///usr/share/doc/libghc-chart-doc/html/Graphics-Rendering-Chart-Backend-Impl.html#t:BackendProgram">BackendProgram</a> a -&gt; <a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.9.1.0/System-IO.html#t:FilePath">FilePath</a> -&gt; <a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.9.1.0/System-IO.html#t:IO">IO</a> a</li></ul></div><div id="interface"><h1>Documentation</h1><div class="top"><p class="src"><span class="keyword">data</span> <a id="t:FileFormat" class="def">FileFormat</a> <a href="src/Graphics-Rendering-Chart-Backend-Cairo.html#FileFormat" class="link">Source</a> <a href="#t:FileFormat" class="selflink">#</a></p><div class="subs constructors"><p class="caption">Constructors</p><table><tr><td class="src"><a id="v:PNG" class="def">PNG</a></td><td class="doc empty">&nbsp;</td></tr><tr><td class="src"><a id="v:SVG" class="def">SVG</a></td><td class="doc empty">&nbsp;</td></tr><tr><td class="src"><a id="v:PS" class="def">PS</a></td><td class="doc empty">&nbsp;</td></tr><tr><td class="src"><a id="v:PDF" class="def">PDF</a></td><td class="doc empty">&nbsp;</td></tr></table></div></div><div class="top"><p class="src"><span class="keyword">data</span> <a id="t:FileOptions" class="def">FileOptions</a> <a href="src/Graphics-Rendering-Chart-Backend-Cairo.html#FileOptions" class="link">Source</a> <a href="#t:FileOptions" class="selflink">#</a></p><div class="subs constructors"><p class="caption">Constructors</p><table><tr><td class="src"><a id="v:FileOptions" class="def">FileOptions</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><div class="subs fields"><p class="caption">Fields</p><ul><li><dfn class="src"><a id="v:_fo_size" class="def">_fo_size</a> :: (<a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.9.1.0/Data-Int.html#t:Int">Int</a>, <a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.9.1.0/Data-Int.html#t:Int">Int</a>)</dfn><div class="doc empty">&nbsp;</div></li><li><dfn class="src"><a id="v:_fo_format" class="def">_fo_format</a> :: <a href="Graphics-Rendering-Chart-Backend-Cairo.html#t:FileFormat">FileFormat</a></dfn><div class="doc empty">&nbsp;</div></li></ul></div></td></tr></table></div><div class="subs instances"><p id="control.i:FileOptions" class="caption collapser" onclick="toggleSection('i:FileOptions')">Instances</p><div id="section.i:FileOptions" class="show"><table><tr><td class="src clearfix"><span class="inst-left"><span id="control.i:id:FileOptions:Default:1" class="instance expander" onclick="toggleSection('i:id:FileOptions:Default:1')"></span> <a href="file:///usr/share/doc/libghc-data-default-class-doc/html/Data-Default-Class.html#t:Default">Default</a> <a href="Graphics-Rendering-Chart-Backend-Cairo.html#t:FileOptions">FileOptions</a></span> <a href="src/Graphics-Rendering-Chart-Backend-Cairo.html#line-177" class="link">Source</a> <a href="#t:FileOptions" class="selflink">#</a></td><td class="doc empty">&nbsp;</td></tr><tr><td colspan="2"><div id="section.i:id:FileOptions:Default:1" class="inst-details hide"><div class="subs methods"><p class="caption">Methods</p><p class="src"><a href="#v:def">def</a> :: <a href="Graphics-Rendering-Chart-Backend-Cairo.html#t:FileOptions">FileOptions</a> <a href="#v:def" class="selflink">#</a></p></div></div></td></tr></table></div></div></div><div class="top"><p class="src"><a id="v:runBackend" class="def">runBackend</a> <a href="src/Graphics-Rendering-Chart-Backend-Cairo.html#runBackend" class="link">Source</a> <a href="#v:runBackend" class="selflink">#</a></p><div class="subs arguments"><p class="caption">Arguments</p><table><tr><td class="src">:: CEnv</td><td class="doc"><p>Environment to start rendering with.</p></td></tr><tr><td class="src">-&gt; <a href="file:///usr/share/doc/libghc-chart-doc/html/Graphics-Rendering-Chart-Backend-Impl.html#t:BackendProgram">BackendProgram</a> a</td><td class="doc"><p>Chart render code.</p></td></tr><tr><td class="src">-&gt; <a href="file:///usr/share/doc/libghc-cairo-doc/html/Graphics-Rendering-Cairo.html#t:Render">Render</a> a</td><td class="doc"><p>Cairo render code.</p></td></tr></table></div><div class="doc"><p>Run this backends renderer.</p></div></div><div class="top"><p class="src"><a id="v:renderableToFile" class="def">renderableToFile</a> :: <a href="Graphics-Rendering-Chart-Backend-Cairo.html#t:FileOptions">FileOptions</a> -&gt; <a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.9.1.0/System-IO.html#t:FilePath">FilePath</a> -&gt; <a href="file:///usr/share/doc/libghc-chart-doc/html/Graphics-Rendering-Chart-Renderable.html#t:Renderable">Renderable</a> a -&gt; <a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.9.1.0/System-IO.html#t:IO">IO</a> (<a href="file:///usr/share/doc/libghc-chart-doc/html/Graphics-Rendering-Chart-Renderable.html#t:PickFn">PickFn</a> a) <a href="src/Graphics-Rendering-Chart-Backend-Cairo.html#renderableToFile" class="link">Source</a> <a href="#v:renderableToFile" class="selflink">#</a></p><div class="doc"><p>Generate an image file for the given renderable, at the specified path. Size and
 format are set through the <code><a href="Graphics-Rendering-Chart-Backend-Cairo.html#t:FileOptions">FileOptions</a></code> parameter.</p></div></div><div class="top"><p class="src"><a id="v:toFile" class="def">toFile</a> :: (<a href="file:///usr/share/doc/libghc-data-default-class-doc/html/Data-Default-Class.html#t:Default">Default</a> r, <a href="file:///usr/share/doc/libghc-chart-doc/html/Graphics-Rendering-Chart-Renderable.html#t:ToRenderable">ToRenderable</a> r) =&gt; <a href="Graphics-Rendering-Chart-Backend-Cairo.html#t:FileOptions">FileOptions</a> -&gt; <a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.9.1.0/System-IO.html#t:FilePath">FilePath</a> -&gt; <a href="file:///usr/share/doc/libghc-chart-doc/html/Graphics-Rendering-Chart-State.html#t:EC">EC</a> r () -&gt; <a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.9.1.0/System-IO.html#t:IO">IO</a> () <a href="src/Graphics-Rendering-Chart-Backend-Cairo.html#toFile" class="link">Source</a> <a href="#v:toFile" class="selflink">#</a></p><div class="doc"><p>Generate an image file from from the state content of an EC
 computation. The state may have any type that is an instance of
 <code><a href="file:///usr/share/doc/libghc-chart-doc/html/Graphics-Rendering-Chart-Renderable.html#t:ToRenderable">ToRenderable</a></code></p></div></div><div class="top"><p class="src"><a id="v:defaultEnv" class="def">defaultEnv</a> :: <a href="file:///usr/share/doc/libghc-chart-doc/html/Graphics-Rendering-Chart-Backend-Types.html#t:AlignmentFns">AlignmentFns</a> -&gt; CEnv <a href="src/Graphics-Rendering-Chart-Backend-Cairo.html#defaultEnv" class="link">Source</a> <a href="#v:defaultEnv" class="selflink">#</a></p><div class="doc"><p>Produce a environment with no transformation and clipping. 
   It will use the default styles.</p></div></div><div class="top"><p class="src"><a id="v:fo_size" class="def">fo_size</a> :: <a href="file:///usr/share/doc/libghc-lens-doc/html/Control-Lens-Type.html#t:Lens-39-">Lens'</a> <a href="Graphics-Rendering-Chart-Backend-Cairo.html#t:FileOptions">FileOptions</a> (<a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.9.1.0/Data-Int.html#t:Int">Int</a>, <a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.9.1.0/Data-Int.html#t:Int">Int</a>) <a href="src/Graphics-Rendering-Chart-Backend-Cairo.html#fo_size" class="link">Source</a> <a href="#v:fo_size" class="selflink">#</a></p></div><div class="top"><p class="src"><a id="v:fo_format" class="def">fo_format</a> :: <a href="file:///usr/share/doc/libghc-lens-doc/html/Control-Lens-Type.html#t:Lens-39-">Lens'</a> <a href="Graphics-Rendering-Chart-Backend-Cairo.html#t:FileOptions">FileOptions</a> <a href="Graphics-Rendering-Chart-Backend-Cairo.html#t:FileFormat">FileFormat</a> <a href="src/Graphics-Rendering-Chart-Backend-Cairo.html#fo_format" class="link">Source</a> <a href="#v:fo_format" class="selflink">#</a></p></div><div class="top"><p class="src"><a id="v:cBackendToFile" class="def">cBackendToFile</a> :: <a href="Graphics-Rendering-Chart-Backend-Cairo.html#t:FileOptions">FileOptions</a> -&gt; <a href="file:///usr/share/doc/libghc-chart-doc/html/Graphics-Rendering-Chart-Backend-Impl.html#t:BackendProgram">BackendProgram</a> a -&gt; <a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.9.1.0/System-IO.html#t:FilePath">FilePath</a> -&gt; <a href="file:///usr/share/doc/ghc-doc/html/libraries/base-4.9.1.0/System-IO.html#t:IO">IO</a> a <a href="src/Graphics-Rendering-Chart-Backend-Cairo.html#cBackendToFile" class="link">Source</a> <a href="#v:cBackendToFile" class="selflink">#</a></p><div class="doc"><p>Generate an image file for the given drawing instructions, at the specified path. Size and
 format are set through the <code><a href="Graphics-Rendering-Chart-Backend-Cairo.html#t:FileOptions">FileOptions</a></code> parameter.</p></div></div></div></div><div id="footer"><p>Produced by <a href="http://www.haskell.org/haddock/">Haddock</a> version 2.17.3</p></div></body></html>