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<title>Graphics/Rendering/Chart/Backend/Cairo.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE GeneralizedNewtypeDeriving #-}</span>
<a name="line-2"></a><span class='hs-comment'>{-# LANGUAGE GADTs #-}</span>
<a name="line-3"></a><span class='hs-comment'>{-# LANGUAGE TemplateHaskell #-}</span>
<a name="line-4"></a>
<a name="line-5"></a><span class='hs-comment'>-- | The backend to render charts with cairo.</span>
<a name="line-6"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>Chart</span><span class='hs-varop'>.</span><span class='hs-conid'>Backend</span><span class='hs-varop'>.</span><span class='hs-conid'>Cairo</span>
<a name="line-7"></a> <span class='hs-layout'>(</span> <span class='hs-conid'>FileFormat</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-8"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>FileOptions</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-9"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>runBackend</span>
<a name="line-10"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>renderableToFile</span>
<a name="line-11"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>toFile</span>
<a name="line-12"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>defaultEnv</span>
<a name="line-13"></a>
<a name="line-14"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>fo_size</span>
<a name="line-15"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>fo_format</span>
<a name="line-16"></a>
<a name="line-17"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>cBackendToFile</span>
<a name="line-18"></a>
<a name="line-19"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-20"></a>
<a name="line-21"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Default</span><span class='hs-varop'>.</span><span class='hs-conid'>Class</span>
<a name="line-22"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Colour</span>
<a name="line-23"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Colour</span><span class='hs-varop'>.</span><span class='hs-conid'>Names</span>
<a name="line-24"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Colour</span><span class='hs-varop'>.</span><span class='hs-conid'>SRGB</span>
<a name="line-25"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span> <span class='hs-layout'>(</span><span class='hs-varid'>unfoldr</span><span class='hs-layout'>)</span>
<a name="line-26"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Monoid</span>
<a name="line-27"></a>
<a name="line-28"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Lens</span><span class='hs-layout'>(</span><span class='hs-varid'>makeLenses</span><span class='hs-layout'>)</span>
<a name="line-29"></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-varop'>.</span><span class='hs-conid'>Reader</span>
<a name="line-30"></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-varop'>.</span><span class='hs-conid'>Operational</span>
<a name="line-31"></a>
<a name="line-32"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>Cairo</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>C</span>
<a name="line-33"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>Cairo</span><span class='hs-varop'>.</span><span class='hs-conid'>Matrix</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>CM</span>
<a name="line-34"></a>
<a name="line-35"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>Chart</span><span class='hs-varop'>.</span><span class='hs-conid'>Backend</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>G</span>
<a name="line-36"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>Chart</span><span class='hs-varop'>.</span><span class='hs-conid'>Backend</span><span class='hs-varop'>.</span><span class='hs-conid'>Impl</span>
<a name="line-37"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>Chart</span><span class='hs-varop'>.</span><span class='hs-conid'>Backend</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span>
<a name="line-38"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>Chart</span><span class='hs-varop'>.</span><span class='hs-conid'>Drawing</span>
<a name="line-39"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>Chart</span><span class='hs-varop'>.</span><span class='hs-conid'>Geometry</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>G</span>
<a name="line-40"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>Chart</span><span class='hs-varop'>.</span><span class='hs-conid'>Renderable</span>
<a name="line-41"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>Chart</span><span class='hs-varop'>.</span><span class='hs-conid'>SparkLine</span>
<a name="line-42"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>Chart</span><span class='hs-varop'>.</span><span class='hs-conid'>State</span><span class='hs-layout'>(</span><span class='hs-conid'>EC</span><span class='hs-layout'>,</span> <span class='hs-varid'>execEC</span><span class='hs-layout'>)</span>
<a name="line-43"></a>
<a name="line-44"></a><span class='hs-comment'>-----------------------------------------------------------------------</span>
<a name="line-45"></a><span class='hs-comment'>-- Rendering Backend Environment</span>
<a name="line-46"></a><span class='hs-comment'>-----------------------------------------------------------------------</span>
<a name="line-47"></a>
<a name="line-48"></a><a name="CEnv"></a><span class='hs-comment'>-- | The environment we need to track when rendering to cairo</span>
<a name="line-49"></a><a name="CEnv"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>CEnv</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>CEnv</span>
<a name="line-50"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>ceAlignmentFns</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>AlignmentFns</span>
<a name="line-51"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>ceFontColor</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>AlphaColour</span> <span class='hs-conid'>Double</span>
<a name="line-52"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>cePathColor</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>AlphaColour</span> <span class='hs-conid'>Double</span>
<a name="line-53"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>ceFillColor</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>AlphaColour</span> <span class='hs-conid'>Double</span>
<a name="line-54"></a><span class='hs-layout'>}</span>
<a name="line-55"></a>
<a name="line-56"></a><a name="defaultEnv"></a><span class='hs-comment'>-- | Produce a environment with no transformation and clipping. </span>
<a name="line-57"></a><span class='hs-comment'>-- It will use the default styles.</span>
<a name="line-58"></a><span class='hs-definition'>defaultEnv</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>AlignmentFns</span>
<a name="line-59"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CEnv</span>
<a name="line-60"></a><span class='hs-definition'>defaultEnv</span> <span class='hs-varid'>alignFns</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>CEnv</span>
<a name="line-61"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>ceAlignmentFns</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>alignFns</span>
<a name="line-62"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>ceFontColor</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>opaque</span> <span class='hs-varid'>black</span>
<a name="line-63"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>cePathColor</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>opaque</span> <span class='hs-varid'>black</span>
<a name="line-64"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>ceFillColor</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>opaque</span> <span class='hs-varid'>white</span>
<a name="line-65"></a> <span class='hs-layout'>}</span>
<a name="line-66"></a>
<a name="line-67"></a><span class='hs-comment'>-- -----------------------------------------------------------------------</span>
<a name="line-68"></a><span class='hs-comment'>-- Backend and Monad</span>
<a name="line-69"></a><span class='hs-comment'>-- -----------------------------------------------------------------------</span>
<a name="line-70"></a>
<a name="line-71"></a><a name="runBackend"></a><span class='hs-comment'>-- | Run this backends renderer.</span>
<a name="line-72"></a><span class='hs-definition'>runBackend</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CEnv</span> <span class='hs-comment'>-- ^ Environment to start rendering with.</span>
<a name="line-73"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>BackendProgram</span> <span class='hs-varid'>a</span> <span class='hs-comment'>-- ^ Chart render code.</span>
<a name="line-74"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Render</span> <span class='hs-varid'>a</span> <span class='hs-comment'>-- ^ Cairo render code.</span>
<a name="line-75"></a><span class='hs-definition'>runBackend</span> <span class='hs-varid'>env</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>runBackend'</span> <span class='hs-varid'>env</span> <span class='hs-layout'>(</span><span class='hs-varid'>withDefaultStyle</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span>
<a name="line-76"></a>
<a name="line-77"></a><a name="runBackend'"></a><span class='hs-definition'>runBackend'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CEnv</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>BackendProgram</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Render</span> <span class='hs-varid'>a</span>
<a name="line-78"></a><span class='hs-definition'>runBackend'</span> <span class='hs-varid'>env</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>eval</span> <span class='hs-varid'>env</span> <span class='hs-layout'>(</span><span class='hs-varid'>view</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span>
<a name="line-79"></a> <span class='hs-keyword'>where</span>
<a name="line-80"></a> <span class='hs-varid'>eval</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CEnv</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ProgramView</span> <span class='hs-conid'>ChartBackendInstr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Render</span> <span class='hs-varid'>a</span>
<a name="line-81"></a> <span class='hs-varid'>eval</span> <span class='hs-varid'>env</span> <span class='hs-layout'>(</span><span class='hs-conid'>Return</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varid'>v</span>
<a name="line-82"></a> <span class='hs-varid'>eval</span> <span class='hs-varid'>env</span> <span class='hs-layout'>(</span><span class='hs-conid'>StrokePath</span> <span class='hs-varid'>p</span> <span class='hs-conop'>:>>=</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cStrokePath</span> <span class='hs-varid'>env</span> <span class='hs-varid'>p</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>step</span> <span class='hs-varid'>env</span> <span class='hs-varid'>f</span>
<a name="line-83"></a> <span class='hs-varid'>eval</span> <span class='hs-varid'>env</span> <span class='hs-layout'>(</span><span class='hs-conid'>FillPath</span> <span class='hs-varid'>p</span> <span class='hs-conop'>:>>=</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cFillPath</span> <span class='hs-varid'>env</span> <span class='hs-varid'>p</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>step</span> <span class='hs-varid'>env</span> <span class='hs-varid'>f</span>
<a name="line-84"></a> <span class='hs-varid'>eval</span> <span class='hs-varid'>env</span> <span class='hs-layout'>(</span><span class='hs-conid'>GetTextSize</span> <span class='hs-varid'>s</span> <span class='hs-conop'>:>>=</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cTextSize</span> <span class='hs-varid'>s</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>step</span> <span class='hs-varid'>env</span> <span class='hs-varid'>f</span>
<a name="line-85"></a> <span class='hs-varid'>eval</span> <span class='hs-varid'>env</span> <span class='hs-layout'>(</span><span class='hs-conid'>DrawText</span> <span class='hs-varid'>p</span> <span class='hs-varid'>s</span> <span class='hs-conop'>:>>=</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cDrawText</span> <span class='hs-varid'>env</span> <span class='hs-varid'>p</span> <span class='hs-varid'>s</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>step</span> <span class='hs-varid'>env</span> <span class='hs-varid'>f</span>
<a name="line-86"></a> <span class='hs-varid'>eval</span> <span class='hs-varid'>env</span> <span class='hs-layout'>(</span><span class='hs-conid'>GetAlignments</span> <span class='hs-conop'>:>>=</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>ceAlignmentFns</span> <span class='hs-varid'>env</span><span class='hs-layout'>)</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>step</span> <span class='hs-varid'>env</span> <span class='hs-varid'>f</span>
<a name="line-87"></a> <span class='hs-varid'>eval</span> <span class='hs-varid'>env</span> <span class='hs-layout'>(</span><span class='hs-conid'>WithTransform</span> <span class='hs-varid'>m</span> <span class='hs-varid'>p</span> <span class='hs-conop'>:>>=</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cWithTransform</span> <span class='hs-varid'>env</span> <span class='hs-varid'>m</span> <span class='hs-varid'>p</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>step</span> <span class='hs-varid'>env</span> <span class='hs-varid'>f</span>
<a name="line-88"></a> <span class='hs-varid'>eval</span> <span class='hs-varid'>env</span> <span class='hs-layout'>(</span><span class='hs-conid'>WithFontStyle</span> <span class='hs-varid'>font</span> <span class='hs-varid'>p</span> <span class='hs-conop'>:>>=</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cWithFontStyle</span> <span class='hs-varid'>env</span> <span class='hs-varid'>font</span> <span class='hs-varid'>p</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>step</span> <span class='hs-varid'>env</span> <span class='hs-varid'>f</span>
<a name="line-89"></a> <span class='hs-varid'>eval</span> <span class='hs-varid'>env</span> <span class='hs-layout'>(</span><span class='hs-conid'>WithFillStyle</span> <span class='hs-varid'>fs</span> <span class='hs-varid'>p</span> <span class='hs-conop'>:>>=</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cWithFillStyle</span> <span class='hs-varid'>env</span> <span class='hs-varid'>fs</span> <span class='hs-varid'>p</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>step</span> <span class='hs-varid'>env</span> <span class='hs-varid'>f</span>
<a name="line-90"></a> <span class='hs-varid'>eval</span> <span class='hs-varid'>env</span> <span class='hs-layout'>(</span><span class='hs-conid'>WithLineStyle</span> <span class='hs-varid'>ls</span> <span class='hs-varid'>p</span> <span class='hs-conop'>:>>=</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cWithLineStyle</span> <span class='hs-varid'>env</span> <span class='hs-varid'>ls</span> <span class='hs-varid'>p</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>step</span> <span class='hs-varid'>env</span> <span class='hs-varid'>f</span>
<a name="line-91"></a> <span class='hs-varid'>eval</span> <span class='hs-varid'>env</span> <span class='hs-layout'>(</span><span class='hs-conid'>WithClipRegion</span> <span class='hs-varid'>r</span> <span class='hs-varid'>p</span> <span class='hs-conop'>:>>=</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cWithClipRegion</span> <span class='hs-varid'>env</span> <span class='hs-varid'>r</span> <span class='hs-varid'>p</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>step</span> <span class='hs-varid'>env</span> <span class='hs-varid'>f</span>
<a name="line-92"></a>
<a name="line-93"></a> <span class='hs-varid'>step</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CEnv</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>v</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>BackendProgram</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>v</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Render</span> <span class='hs-varid'>a</span>
<a name="line-94"></a> <span class='hs-varid'>step</span> <span class='hs-varid'>env</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>v</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>runBackend'</span> <span class='hs-varid'>env</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span>
<a name="line-95"></a>
<a name="line-96"></a><a name="walkPath"></a><span class='hs-definition'>walkPath</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Path</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Render</span> <span class='hs-conid'>()</span>
<a name="line-97"></a><span class='hs-definition'>walkPath</span> <span class='hs-layout'>(</span><span class='hs-conid'>MoveTo</span> <span class='hs-varid'>p</span> <span class='hs-varid'>path</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>moveTo</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_x</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_y</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-varop'>>></span> <span class='hs-varid'>walkPath</span> <span class='hs-varid'>path</span>
<a name="line-98"></a><span class='hs-definition'>walkPath</span> <span class='hs-layout'>(</span><span class='hs-conid'>LineTo</span> <span class='hs-varid'>p</span> <span class='hs-varid'>path</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>lineTo</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_x</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_y</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-varop'>>></span> <span class='hs-varid'>walkPath</span> <span class='hs-varid'>path</span>
<a name="line-99"></a><span class='hs-definition'>walkPath</span> <span class='hs-layout'>(</span><span class='hs-conid'>Arc</span> <span class='hs-varid'>p</span> <span class='hs-varid'>r</span> <span class='hs-varid'>a1</span> <span class='hs-varid'>a2</span> <span class='hs-varid'>path</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>arc</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_x</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_y</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span> <span class='hs-varid'>a1</span> <span class='hs-varid'>a2</span> <span class='hs-varop'>>></span> <span class='hs-varid'>walkPath</span> <span class='hs-varid'>path</span>
<a name="line-100"></a><span class='hs-definition'>walkPath</span> <span class='hs-layout'>(</span><span class='hs-conid'>ArcNeg</span> <span class='hs-varid'>p</span> <span class='hs-varid'>r</span> <span class='hs-varid'>a1</span> <span class='hs-varid'>a2</span> <span class='hs-varid'>path</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>arcNegative</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_x</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_y</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span> <span class='hs-varid'>a1</span> <span class='hs-varid'>a2</span> <span class='hs-varop'>>></span> <span class='hs-varid'>walkPath</span> <span class='hs-varid'>path</span>
<a name="line-101"></a><span class='hs-definition'>walkPath</span> <span class='hs-conid'>End</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-102"></a><span class='hs-definition'>walkPath</span> <span class='hs-conid'>Close</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>closePath</span>
<a name="line-103"></a>
<a name="line-104"></a><a name="cStrokePath"></a><span class='hs-definition'>cStrokePath</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CEnv</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Path</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Render</span> <span class='hs-conid'>()</span>
<a name="line-105"></a><span class='hs-definition'>cStrokePath</span> <span class='hs-varid'>env</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>preserveCState0</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-106"></a> <span class='hs-varid'>setSourceColor</span> <span class='hs-layout'>(</span><span class='hs-varid'>cePathColor</span> <span class='hs-varid'>env</span><span class='hs-layout'>)</span>
<a name="line-107"></a> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>newPath</span> <span class='hs-varop'>>></span> <span class='hs-varid'>walkPath</span> <span class='hs-varid'>p</span> <span class='hs-varop'>>></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>stroke</span>
<a name="line-108"></a>
<a name="line-109"></a><a name="cFillPath"></a><span class='hs-definition'>cFillPath</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CEnv</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Path</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Render</span> <span class='hs-conid'>()</span>
<a name="line-110"></a><span class='hs-definition'>cFillPath</span> <span class='hs-varid'>env</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>preserveCState0</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-111"></a> <span class='hs-varid'>setSourceColor</span> <span class='hs-layout'>(</span><span class='hs-varid'>ceFillColor</span> <span class='hs-varid'>env</span><span class='hs-layout'>)</span>
<a name="line-112"></a> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>newPath</span> <span class='hs-varop'>>></span> <span class='hs-varid'>walkPath</span> <span class='hs-varid'>p</span> <span class='hs-varop'>>></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>fill</span>
<a name="line-113"></a>
<a name="line-114"></a><a name="cTextSize"></a><span class='hs-definition'>cTextSize</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Render</span> <span class='hs-conid'>TextSize</span>
<a name="line-115"></a><span class='hs-definition'>cTextSize</span> <span class='hs-varid'>text</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-116"></a> <span class='hs-varid'>te</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>textExtents</span> <span class='hs-varid'>text</span>
<a name="line-117"></a> <span class='hs-varid'>fe</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>fontExtents</span>
<a name="line-118"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>TextSize</span>
<a name="line-119"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>textSizeWidth</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>textExtentsWidth</span> <span class='hs-varid'>te</span>
<a name="line-120"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>textSizeAscent</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>fontExtentsAscent</span> <span class='hs-varid'>fe</span>
<a name="line-121"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>textSizeDescent</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>fontExtentsDescent</span> <span class='hs-varid'>fe</span>
<a name="line-122"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>textSizeYBearing</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>textExtentsYbearing</span> <span class='hs-varid'>te</span>
<a name="line-123"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>textSizeHeight</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>fontExtentsHeight</span> <span class='hs-varid'>fe</span>
<a name="line-124"></a> <span class='hs-layout'>}</span>
<a name="line-125"></a>
<a name="line-126"></a><a name="cDrawText"></a><span class='hs-definition'>cDrawText</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CEnv</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Point</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Render</span> <span class='hs-conid'>()</span>
<a name="line-127"></a><span class='hs-definition'>cDrawText</span> <span class='hs-varid'>env</span> <span class='hs-varid'>p</span> <span class='hs-varid'>text</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>preserveCState0</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-128"></a> <span class='hs-varid'>setSourceColor</span> <span class='hs-varop'>$</span> <span class='hs-layout'>(</span><span class='hs-varid'>ceFontColor</span> <span class='hs-varid'>env</span><span class='hs-layout'>)</span>
<a name="line-129"></a> <span class='hs-varid'>cTranslate</span> <span class='hs-varid'>p</span>
<a name="line-130"></a> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>moveTo</span> <span class='hs-num'>0</span> <span class='hs-num'>0</span>
<a name="line-131"></a> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>showText</span> <span class='hs-varid'>text</span>
<a name="line-132"></a>
<a name="line-133"></a><a name="cWithTransform"></a><span class='hs-definition'>cWithTransform</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CEnv</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Matrix</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>BackendProgram</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Render</span> <span class='hs-varid'>a</span>
<a name="line-134"></a><span class='hs-definition'>cWithTransform</span> <span class='hs-varid'>env</span> <span class='hs-varid'>m</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>preserveCState0</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-135"></a> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>transform</span> <span class='hs-layout'>(</span><span class='hs-varid'>convertMatrix</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span>
<a name="line-136"></a> <span class='hs-varid'>runBackend'</span> <span class='hs-varid'>env</span> <span class='hs-varid'>p</span>
<a name="line-137"></a>
<a name="line-138"></a><a name="cWithFontStyle"></a><span class='hs-definition'>cWithFontStyle</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CEnv</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FontStyle</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>BackendProgram</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Render</span> <span class='hs-varid'>a</span>
<a name="line-139"></a><span class='hs-definition'>cWithFontStyle</span> <span class='hs-varid'>env</span> <span class='hs-varid'>font</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>preserveCState0</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-140"></a> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>selectFontFace</span> <span class='hs-layout'>(</span><span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-sel'>_font_name</span> <span class='hs-varid'>font</span><span class='hs-layout'>)</span>
<a name="line-141"></a> <span class='hs-layout'>(</span><span class='hs-varid'>convertFontSlant</span> <span class='hs-varop'>$</span> <span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-sel'>_font_slant</span> <span class='hs-varid'>font</span><span class='hs-layout'>)</span>
<a name="line-142"></a> <span class='hs-layout'>(</span><span class='hs-varid'>convertFontWeight</span> <span class='hs-varop'>$</span> <span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-sel'>_font_weight</span> <span class='hs-varid'>font</span><span class='hs-layout'>)</span>
<a name="line-143"></a> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>setFontSize</span> <span class='hs-layout'>(</span><span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-sel'>_font_size</span> <span class='hs-varid'>font</span><span class='hs-layout'>)</span>
<a name="line-144"></a> <span class='hs-varid'>runBackend'</span> <span class='hs-varid'>env</span><span class='hs-layout'>{</span><span class='hs-varid'>ceFontColor</span><span class='hs-keyglyph'>=</span><span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-sel'>_font_color</span> <span class='hs-varid'>font</span><span class='hs-layout'>}</span> <span class='hs-varid'>p</span>
<a name="line-145"></a>
<a name="line-146"></a><a name="cWithFillStyle"></a><span class='hs-definition'>cWithFillStyle</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CEnv</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FillStyle</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>BackendProgram</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Render</span> <span class='hs-varid'>a</span>
<a name="line-147"></a><span class='hs-definition'>cWithFillStyle</span> <span class='hs-varid'>env</span> <span class='hs-varid'>fs</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-148"></a> <span class='hs-varid'>runBackend'</span> <span class='hs-varid'>env</span><span class='hs-layout'>{</span><span class='hs-varid'>ceFillColor</span><span class='hs-keyglyph'>=</span><span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-sel'>_fill_color</span> <span class='hs-varid'>fs</span><span class='hs-layout'>}</span> <span class='hs-varid'>p</span>
<a name="line-149"></a>
<a name="line-150"></a><a name="cWithLineStyle"></a><span class='hs-definition'>cWithLineStyle</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CEnv</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>LineStyle</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>BackendProgram</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Render</span> <span class='hs-varid'>a</span>
<a name="line-151"></a><span class='hs-definition'>cWithLineStyle</span> <span class='hs-varid'>env</span> <span class='hs-varid'>ls</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>preserveCState0</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-152"></a> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>setLineWidth</span> <span class='hs-layout'>(</span><span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-sel'>_line_width</span> <span class='hs-varid'>ls</span><span class='hs-layout'>)</span>
<a name="line-153"></a> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>setLineCap</span> <span class='hs-layout'>(</span><span class='hs-varid'>convertLineCap</span> <span class='hs-varop'>$</span> <span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-sel'>_line_cap</span> <span class='hs-varid'>ls</span><span class='hs-layout'>)</span>
<a name="line-154"></a> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>setLineJoin</span> <span class='hs-layout'>(</span><span class='hs-varid'>convertLineJoin</span> <span class='hs-varop'>$</span> <span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-sel'>_line_join</span> <span class='hs-varid'>ls</span><span class='hs-layout'>)</span>
<a name="line-155"></a> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>setDash</span> <span class='hs-layout'>(</span><span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-sel'>_line_dashes</span> <span class='hs-varid'>ls</span><span class='hs-layout'>)</span> <span class='hs-num'>0</span>
<a name="line-156"></a> <span class='hs-varid'>runBackend'</span> <span class='hs-varid'>env</span><span class='hs-layout'>{</span><span class='hs-varid'>cePathColor</span><span class='hs-keyglyph'>=</span><span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-sel'>_line_color</span> <span class='hs-varid'>ls</span><span class='hs-layout'>}</span> <span class='hs-varid'>p</span>
<a name="line-157"></a>
<a name="line-158"></a><a name="cWithClipRegion"></a><span class='hs-definition'>cWithClipRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CEnv</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Rect</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>BackendProgram</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Render</span> <span class='hs-varid'>a</span>
<a name="line-159"></a><span class='hs-definition'>cWithClipRegion</span> <span class='hs-varid'>env</span> <span class='hs-varid'>r</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>preserveCState0</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-160"></a> <span class='hs-varid'>setClipRegion</span> <span class='hs-varid'>r</span>
<a name="line-161"></a> <span class='hs-varid'>runBackend'</span> <span class='hs-varid'>env</span> <span class='hs-varid'>p</span>
<a name="line-162"></a>
<a name="line-163"></a><span class='hs-comment'>-- -----------------------------------------------------------------------</span>
<a name="line-164"></a><span class='hs-comment'>-- Output rendering functions</span>
<a name="line-165"></a><span class='hs-comment'>-- -----------------------------------------------------------------------</span>
<a name="line-166"></a>
<a name="line-167"></a><a name="FileFormat"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>FileFormat</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PNG</span>
<a name="line-168"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>SVG</span>
<a name="line-169"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>PS</span>
<a name="line-170"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>PDF</span>
<a name="line-171"></a>
<a name="line-172"></a><a name="FileOptions"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>FileOptions</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FileOptions</span> <span class='hs-layout'>{</span>
<a name="line-173"></a> <span class='hs-sel'>_fo_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><span class='hs-layout'>,</span>
<a name="line-174"></a> <span class='hs-sel'>_fo_format</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FileFormat</span>
<a name="line-175"></a><span class='hs-layout'>}</span>
<a name="line-176"></a>
<a name="line-177"></a><a name="instance%20Default%20FileOptions"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Default</span> <span class='hs-conid'>FileOptions</span> <span class='hs-keyword'>where</span>
<a name="line-178"></a> <span class='hs-varid'>def</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FileOptions</span> <span class='hs-layout'>(</span><span class='hs-num'>800</span><span class='hs-layout'>,</span><span class='hs-num'>600</span><span class='hs-layout'>)</span> <span class='hs-conid'>PNG</span>
<a name="line-179"></a>
<a name="line-180"></a><a name="renderableToFile"></a><span class='hs-comment'>-- | Generate an image file for the given renderable, at the specified path. Size and</span>
<a name="line-181"></a><span class='hs-comment'>-- format are set through the `FileOptions` parameter.</span>
<a name="line-182"></a><span class='hs-definition'>renderableToFile</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FileOptions</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Renderable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>PickFn</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-183"></a><span class='hs-definition'>renderableToFile</span> <span class='hs-varid'>fo</span> <span class='hs-varid'>path</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cBackendToFile</span> <span class='hs-varid'>fo</span> <span class='hs-varid'>cr</span> <span class='hs-varid'>path</span>
<a name="line-184"></a> <span class='hs-keyword'>where</span>
<a name="line-185"></a> <span class='hs-varid'>cr</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>render</span> <span class='hs-varid'>r</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>width</span><span class='hs-layout'>,</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>height</span><span class='hs-layout'>)</span>
<a name="line-186"></a> <span class='hs-layout'>(</span><span class='hs-varid'>width</span><span class='hs-layout'>,</span><span class='hs-varid'>height</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>_fo_size</span> <span class='hs-varid'>fo</span>
<a name="line-187"></a>
<a name="line-188"></a><a name="toFile"></a><span class='hs-comment'>-- | Generate an image file from from the state content of an EC</span>
<a name="line-189"></a><span class='hs-comment'>-- computation. The state may have any type that is an instance of</span>
<a name="line-190"></a><span class='hs-comment'>-- `ToRenderable`</span>
<a name="line-191"></a><span class='hs-definition'>toFile</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Default</span> <span class='hs-varid'>r</span><span class='hs-layout'>,</span> <span class='hs-conid'>ToRenderable</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>FileOptions</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>EC</span> <span class='hs-varid'>r</span> <span class='hs-conid'>()</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-192"></a><span class='hs-definition'>toFile</span> <span class='hs-varid'>fo</span> <span class='hs-varid'>path</span> <span class='hs-varid'>ec</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>void</span> <span class='hs-varop'>$</span> <span class='hs-varid'>renderableToFile</span> <span class='hs-varid'>fo</span> <span class='hs-varid'>path</span> <span class='hs-layout'>(</span><span class='hs-varid'>toRenderable</span> <span class='hs-layout'>(</span><span class='hs-varid'>execEC</span> <span class='hs-varid'>ec</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-193"></a>
<a name="line-194"></a><a name="cBackendToFile"></a><span class='hs-comment'>-- | Generate an image file for the given drawing instructions, at the specified path. Size and</span>
<a name="line-195"></a><span class='hs-comment'>-- format are set through the `FileOptions` parameter.</span>
<a name="line-196"></a><span class='hs-definition'>cBackendToFile</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FileOptions</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>BackendProgram</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span>
<a name="line-197"></a><span class='hs-definition'>cBackendToFile</span> <span class='hs-varid'>fo</span> <span class='hs-varid'>cr</span> <span class='hs-varid'>path</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-198"></a> <span class='hs-keyword'>case</span> <span class='hs-layout'>(</span><span class='hs-sel'>_fo_format</span> <span class='hs-varid'>fo</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-199"></a> <span class='hs-conid'>PS</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>write</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>withPSSurface</span>
<a name="line-200"></a> <span class='hs-conid'>PDF</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>write</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>withPDFSurface</span>
<a name="line-201"></a> <span class='hs-conid'>SVG</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>write</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>withSVGSurface</span>
<a name="line-202"></a> <span class='hs-conid'>PNG</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>writePNG</span>
<a name="line-203"></a> <span class='hs-keyword'>where</span>
<a name="line-204"></a> <span class='hs-varid'>write</span> <span class='hs-varid'>withSurface</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-205"></a> <span class='hs-varid'>withSurface</span> <span class='hs-varid'>path</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>width</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>height</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>result</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-206"></a> <span class='hs-varid'>pf</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>renderWith</span> <span class='hs-varid'>result</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-207"></a> <span class='hs-varid'>pf</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>runBackend</span> <span class='hs-layout'>(</span><span class='hs-varid'>defaultEnv</span> <span class='hs-varid'>vectorAlignmentFns</span><span class='hs-layout'>)</span> <span class='hs-varid'>cr</span>
<a name="line-208"></a> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>showPage</span>
<a name="line-209"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>pf</span>
<a name="line-210"></a> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>surfaceFinish</span> <span class='hs-varid'>result</span>
<a name="line-211"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>pf</span>
<a name="line-212"></a>
<a name="line-213"></a> <span class='hs-varid'>writePNG</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>withImageSurface</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>FormatARGB32</span> <span class='hs-varid'>width</span> <span class='hs-varid'>height</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>result</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-214"></a> <span class='hs-varid'>pf</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>renderWith</span> <span class='hs-varid'>result</span> <span class='hs-varop'>$</span> <span class='hs-varid'>runBackend</span> <span class='hs-layout'>(</span><span class='hs-varid'>defaultEnv</span> <span class='hs-varid'>bitmapAlignmentFns</span><span class='hs-layout'>)</span> <span class='hs-varid'>cr</span>
<a name="line-215"></a> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>surfaceWriteToPNG</span> <span class='hs-varid'>result</span> <span class='hs-varid'>path</span>
<a name="line-216"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>pf</span>
<a name="line-217"></a>
<a name="line-218"></a> <span class='hs-layout'>(</span><span class='hs-varid'>width</span><span class='hs-layout'>,</span><span class='hs-varid'>height</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>_fo_size</span> <span class='hs-varid'>fo</span>
<a name="line-219"></a>
<a name="line-220"></a><span class='hs-comment'>-- -----------------------------------------------------------------------</span>
<a name="line-221"></a><span class='hs-comment'>-- Type Conversions: Chart -> Cairo</span>
<a name="line-222"></a><span class='hs-comment'>-- -----------------------------------------------------------------------</span>
<a name="line-223"></a>
<a name="line-224"></a><a name="convertLineJoin"></a><span class='hs-comment'>-- | Convert a charts line join to a cairo line join.</span>
<a name="line-225"></a><span class='hs-definition'>convertLineJoin</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-conid'>LineJoin</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>LineJoin</span>
<a name="line-226"></a><span class='hs-definition'>convertLineJoin</span> <span class='hs-varid'>lj</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>lj</span> <span class='hs-keyword'>of</span>
<a name="line-227"></a> <span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-conid'>LineJoinMiter</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>LineJoinMiter</span>
<a name="line-228"></a> <span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-conid'>LineJoinRound</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>LineJoinRound</span>
<a name="line-229"></a> <span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-conid'>LineJoinBevel</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>LineJoinBevel</span>
<a name="line-230"></a>
<a name="line-231"></a><a name="convertLineCap"></a><span class='hs-comment'>-- | Convert a charts line cap to a cairo line cap.</span>
<a name="line-232"></a><span class='hs-definition'>convertLineCap</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-conid'>LineCap</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>LineCap</span>
<a name="line-233"></a><span class='hs-definition'>convertLineCap</span> <span class='hs-varid'>lc</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>lc</span> <span class='hs-keyword'>of</span>
<a name="line-234"></a> <span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-conid'>LineCapRound</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>LineCapRound</span>
<a name="line-235"></a> <span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-conid'>LineCapButt</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>LineCapButt</span>
<a name="line-236"></a> <span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-conid'>LineCapSquare</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>LineCapSquare</span>
<a name="line-237"></a>
<a name="line-238"></a><a name="convertFontSlant"></a><span class='hs-definition'>convertFontSlant</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-conid'>FontSlant</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>FontSlant</span>
<a name="line-239"></a><span class='hs-definition'>convertFontSlant</span> <span class='hs-varid'>fs</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>fs</span> <span class='hs-keyword'>of</span>
<a name="line-240"></a> <span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-conid'>FontSlantItalic</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>FontSlantItalic</span>
<a name="line-241"></a> <span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-conid'>FontSlantNormal</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>FontSlantNormal</span>
<a name="line-242"></a> <span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-conid'>FontSlantOblique</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>FontSlantOblique</span>
<a name="line-243"></a>
<a name="line-244"></a><a name="convertFontWeight"></a><span class='hs-definition'>convertFontWeight</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-conid'>FontWeight</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>FontWeight</span>
<a name="line-245"></a><span class='hs-definition'>convertFontWeight</span> <span class='hs-varid'>fw</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>fw</span> <span class='hs-keyword'>of</span>
<a name="line-246"></a> <span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-conid'>FontWeightBold</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>FontWeightBold</span>
<a name="line-247"></a> <span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-conid'>FontWeightNormal</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>FontWeightNormal</span>
<a name="line-248"></a>
<a name="line-249"></a><a name="convertMatrix"></a><span class='hs-definition'>convertMatrix</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-conid'>Matrix</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CM</span><span class='hs-varop'>.</span><span class='hs-conid'>Matrix</span>
<a name="line-250"></a><span class='hs-definition'>convertMatrix</span> <span class='hs-layout'>(</span><span class='hs-conid'>G</span><span class='hs-varop'>.</span><span class='hs-conid'>Matrix</span> <span class='hs-varid'>a1</span> <span class='hs-varid'>a2</span> <span class='hs-varid'>b1</span> <span class='hs-varid'>b2</span> <span class='hs-varid'>c1</span> <span class='hs-varid'>c2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>CM</span><span class='hs-varop'>.</span><span class='hs-conid'>Matrix</span> <span class='hs-varid'>a1</span> <span class='hs-varid'>a2</span> <span class='hs-varid'>b1</span> <span class='hs-varid'>b2</span> <span class='hs-varid'>c1</span> <span class='hs-varid'>c2</span>
<a name="line-251"></a>
<a name="line-252"></a><span class='hs-comment'>-- -----------------------------------------------------------------------</span>
<a name="line-253"></a><span class='hs-comment'>-- Assorted helper functions in Cairo Usage</span>
<a name="line-254"></a><span class='hs-comment'>-- -----------------------------------------------------------------------</span>
<a name="line-255"></a>
<a name="line-256"></a><a name="setClipRegion"></a><span class='hs-definition'>setClipRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Rect</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Render</span> <span class='hs-conid'>()</span>
<a name="line-257"></a><span class='hs-definition'>setClipRegion</span> <span class='hs-layout'>(</span><span class='hs-conid'>Rect</span> <span class='hs-varid'>p2</span> <span class='hs-varid'>p3</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-258"></a> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>moveTo</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_x</span> <span class='hs-varid'>p2</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_y</span> <span class='hs-varid'>p2</span><span class='hs-layout'>)</span>
<a name="line-259"></a> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>lineTo</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_x</span> <span class='hs-varid'>p2</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_y</span> <span class='hs-varid'>p3</span><span class='hs-layout'>)</span>
<a name="line-260"></a> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>lineTo</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_x</span> <span class='hs-varid'>p3</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_y</span> <span class='hs-varid'>p3</span><span class='hs-layout'>)</span>
<a name="line-261"></a> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>lineTo</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_x</span> <span class='hs-varid'>p3</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_y</span> <span class='hs-varid'>p2</span><span class='hs-layout'>)</span>
<a name="line-262"></a> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>lineTo</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_x</span> <span class='hs-varid'>p2</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_y</span> <span class='hs-varid'>p2</span><span class='hs-layout'>)</span>
<a name="line-263"></a> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>clip</span>
<a name="line-264"></a>
<a name="line-265"></a><a name="colourChannel"></a><span class='hs-definition'>colourChannel</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Floating</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Ord</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>AlphaColour</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Colour</span> <span class='hs-varid'>a</span>
<a name="line-266"></a><span class='hs-definition'>colourChannel</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>darken</span> <span class='hs-layout'>(</span><span class='hs-varid'>recip</span> <span class='hs-layout'>(</span><span class='hs-varid'>alphaChannel</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span> <span class='hs-varop'>`over`</span> <span class='hs-varid'>black</span><span class='hs-layout'>)</span>
<a name="line-267"></a>
<a name="line-268"></a><a name="setSourceColor"></a><span class='hs-definition'>setSourceColor</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>AlphaColour</span> <span class='hs-conid'>Double</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Render</span> <span class='hs-conid'>()</span>
<a name="line-269"></a><span class='hs-definition'>setSourceColor</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-conid'>RGB</span> <span class='hs-varid'>r</span> <span class='hs-varid'>g</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toSRGB</span> <span class='hs-varop'>$</span> <span class='hs-varid'>colourChannel</span> <span class='hs-varid'>c</span>
<a name="line-270"></a> <span class='hs-keyword'>in</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>setSourceRGBA</span> <span class='hs-varid'>r</span> <span class='hs-varid'>g</span> <span class='hs-varid'>b</span> <span class='hs-layout'>(</span><span class='hs-varid'>alphaChannel</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-271"></a>
<a name="line-272"></a><a name="preserveCState0"></a><span class='hs-comment'>-- | Execute a rendering action in a saved context (ie bracketed</span>
<a name="line-273"></a><span class='hs-comment'>-- between C.save and C.restore).</span>
<a name="line-274"></a><span class='hs-definition'>preserveCState0</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Render</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Render</span> <span class='hs-varid'>a</span>
<a name="line-275"></a><span class='hs-definition'>preserveCState0</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-276"></a> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>save</span>
<a name="line-277"></a> <span class='hs-varid'>v</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>a</span>
<a name="line-278"></a> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>restore</span>
<a name="line-279"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>v</span>
<a name="line-280"></a>
<a name="line-281"></a><span class='hs-comment'>-- -- -----------------------------------------------------------------------</span>
<a name="line-282"></a><span class='hs-comment'>-- -- Cairo Operation Wrappers</span>
<a name="line-283"></a><span class='hs-comment'>-- -- -----------------------------------------------------------------------</span>
<a name="line-284"></a>
<a name="line-285"></a><a name="cTranslate"></a><span class='hs-definition'>cTranslate</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Point</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Render</span> <span class='hs-conid'>()</span>
<a name="line-286"></a><span class='hs-definition'>cTranslate</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'>translate</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_x</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_y</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-287"></a>
<a name="line-288"></a><a name="cLineTo"></a><span class='hs-definition'>cLineTo</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Point</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Render</span> <span class='hs-conid'>()</span>
<a name="line-289"></a><span class='hs-definition'>cLineTo</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'>lineTo</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_x</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_y</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-290"></a>
<a name="line-291"></a><a name="cMoveTo"></a><span class='hs-definition'>cMoveTo</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Point</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Render</span> <span class='hs-conid'>()</span>
<a name="line-292"></a><span class='hs-definition'>cMoveTo</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'>moveTo</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_x</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_y</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-293"></a>
<a name="line-294"></a><a name="cArc"></a><span class='hs-definition'>cArc</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Point</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Double</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Double</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Double</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Render</span> <span class='hs-conid'>()</span>
<a name="line-295"></a><span class='hs-definition'>cArc</span> <span class='hs-varid'>p</span> <span class='hs-varid'>r</span> <span class='hs-varid'>a1</span> <span class='hs-varid'>a2</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>arc</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_x</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_y</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span> <span class='hs-varid'>a1</span> <span class='hs-varid'>a2</span>
<a name="line-296"></a>
<a name="line-297"></a><a name="cArcNegative"></a><span class='hs-definition'>cArcNegative</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Point</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Double</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Double</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Double</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Render</span> <span class='hs-conid'>()</span>
<a name="line-298"></a><span class='hs-definition'>cArcNegative</span> <span class='hs-varid'>p</span> <span class='hs-varid'>r</span> <span class='hs-varid'>a1</span> <span class='hs-varid'>a2</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>arcNegative</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_x</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>p_y</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span> <span class='hs-varid'>a1</span> <span class='hs-varid'>a2</span>
<a name="line-299"></a>
<a name="line-300"></a><span class='hs-varop'>$</span><span class='hs-layout'>(</span> <span class='hs-varid'>makeLenses</span> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>FileOptions</span> <span class='hs-layout'>)</span>
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