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<title>Graphics/Gloss/Data/Picture.hs</title>
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<pre><a name="line-1"></a>
<a name="line-2"></a><span class='hs-comment'>-- | Data types for representing pictures.</span>
<a name="line-3"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Gloss</span><span class='hs-varop'>.</span><span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Picture</span>
<a name="line-4"></a> <span class='hs-layout'>(</span> <span class='hs-conid'>Point</span>
<a name="line-5"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Vector</span>
<a name="line-6"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Path</span>
<a name="line-7"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Picture</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'>BitmapData</span>
<a name="line-9"></a>
<a name="line-10"></a> <span class='hs-comment'>-- * Aliases for Picture constructors</span>
<a name="line-11"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>blank</span>
<a name="line-12"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>polygon</span>
<a name="line-13"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>line</span>
<a name="line-14"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>circle</span><span class='hs-layout'>,</span> <span class='hs-varid'>thickCircle</span>
<a name="line-15"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>arc</span><span class='hs-layout'>,</span> <span class='hs-varid'>thickArc</span>
<a name="line-16"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>text</span>
<a name="line-17"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>bitmap</span>
<a name="line-18"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>color</span>
<a name="line-19"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>translate</span><span class='hs-layout'>,</span> <span class='hs-varid'>rotate</span><span class='hs-layout'>,</span> <span class='hs-varid'>scale</span>
<a name="line-20"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>pictures</span>
<a name="line-21"></a>
<a name="line-22"></a> <span class='hs-comment'>-- * Compound shapes</span>
<a name="line-23"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>lineLoop</span>
<a name="line-24"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>circleSolid</span>
<a name="line-25"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>arcSolid</span>
<a name="line-26"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>sectorWire</span>
<a name="line-27"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>rectanglePath</span>
<a name="line-28"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>rectangleWire</span>
<a name="line-29"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>rectangleSolid</span>
<a name="line-30"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>rectangleUpperPath</span>
<a name="line-31"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>rectangleUpperWire</span>
<a name="line-32"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>rectangleUpperSolid</span>
<a name="line-33"></a>
<a name="line-34"></a> <span class='hs-comment'>-- * Loading Bitmaps</span>
<a name="line-35"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>bitmapOfForeignPtr</span>
<a name="line-36"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>bitmapOfByteString</span>
<a name="line-37"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>bitmapOfBMP</span>
<a name="line-38"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>loadBMP</span><span class='hs-layout'>)</span>
<a name="line-39"></a>
<a name="line-40"></a><span class='hs-keyword'>where</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'>Gloss</span><span class='hs-varop'>.</span><span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Color</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'>Gloss</span><span class='hs-varop'>.</span><span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Point</span>
<a name="line-43"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Gloss</span><span class='hs-varop'>.</span><span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Vector</span>
<a name="line-44"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Gloss</span><span class='hs-varop'>.</span><span class='hs-conid'>Geometry</span><span class='hs-varop'>.</span><span class='hs-conid'>Angle</span>
<a name="line-45"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Gloss</span><span class='hs-varop'>.</span><span class='hs-conid'>Internals</span><span class='hs-varop'>.</span><span class='hs-conid'>Render</span><span class='hs-varop'>.</span><span class='hs-conid'>Bitmap</span>
<a name="line-46"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Codec</span><span class='hs-varop'>.</span><span class='hs-conid'>BMP</span>
<a name="line-47"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>ForeignPtr</span>
<a name="line-48"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Marshal</span><span class='hs-varop'>.</span><span class='hs-conid'>Alloc</span>
<a name="line-49"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Marshal</span><span class='hs-varop'>.</span><span class='hs-conid'>Utils</span>
<a name="line-50"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Ptr</span>
<a name="line-51"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Word</span>
<a name="line-52"></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-53"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span>
<a name="line-54"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Unsafe</span>
<a name="line-55"></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'>Unsafe</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>BSU</span>
<a name="line-56"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Prelude</span> <span class='hs-varid'>hiding</span> <span class='hs-layout'>(</span><span class='hs-varid'>map</span><span class='hs-layout'>)</span>
<a name="line-57"></a>
<a name="line-58"></a><a name="Path"></a><span class='hs-comment'>-- | A path through the x-y plane.</span>
<a name="line-59"></a><a name="Path"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Path</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Point</span><span class='hs-keyglyph'>]</span>
<a name="line-60"></a>
<a name="line-61"></a>
<a name="line-62"></a><a name="Picture"></a><span class='hs-comment'>-- | A 2D picture</span>
<a name="line-63"></a><a name="Picture"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Picture</span>
<a name="line-64"></a> <span class='hs-comment'>-- Primitives -------------------------------------</span>
<a name="line-65"></a>
<a name="line-66"></a> <span class='hs-comment'>-- | A blank picture, with nothing in it.</span>
<a name="line-67"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Blank</span>
<a name="line-68"></a>
<a name="line-69"></a> <span class='hs-comment'>-- | A convex polygon filled with a solid color.</span>
<a name="line-70"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Polygon</span> <span class='hs-conid'>Path</span>
<a name="line-71"></a>
<a name="line-72"></a> <span class='hs-comment'>-- | A line along an arbitrary path.</span>
<a name="line-73"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Line</span> <span class='hs-conid'>Path</span>
<a name="line-74"></a>
<a name="line-75"></a> <span class='hs-comment'>-- | A circle with the given radius.</span>
<a name="line-76"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Circle</span> <span class='hs-conid'>Float</span>
<a name="line-77"></a>
<a name="line-78"></a> <span class='hs-comment'>-- | A circle with the given thickness and radius.</span>
<a name="line-79"></a> <span class='hs-comment'>-- If the thickness is 0 then this is equivalent to `Circle`.</span>
<a name="line-80"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ThickCircle</span> <span class='hs-conid'>Float</span> <span class='hs-conid'>Float</span>
<a name="line-81"></a>
<a name="line-82"></a> <span class='hs-comment'>-- | A circular arc drawn counter-clockwise between two angles </span>
<a name="line-83"></a> <span class='hs-comment'>-- (in degrees) at the given radius.</span>
<a name="line-84"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Arc</span> <span class='hs-conid'>Float</span> <span class='hs-conid'>Float</span> <span class='hs-conid'>Float</span>
<a name="line-85"></a>
<a name="line-86"></a> <span class='hs-comment'>-- | A circular arc drawn counter-clockwise between two angles </span>
<a name="line-87"></a> <span class='hs-comment'>-- (in degrees), with the given radius and thickness.</span>
<a name="line-88"></a> <span class='hs-comment'>-- If the thickness is 0 then this is equivalent to `Arc`.</span>
<a name="line-89"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ThickArc</span> <span class='hs-conid'>Float</span> <span class='hs-conid'>Float</span> <span class='hs-conid'>Float</span> <span class='hs-conid'>Float</span>
<a name="line-90"></a>
<a name="line-91"></a> <span class='hs-comment'>-- | Some text to draw with a vector font.</span>
<a name="line-92"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Text</span> <span class='hs-conid'>String</span>
<a name="line-93"></a>
<a name="line-94"></a> <span class='hs-comment'>-- | A bitmap image with a width, height and some 32-bit RGBA</span>
<a name="line-95"></a> <span class='hs-comment'>-- bitmap data.</span>
<a name="line-96"></a> <span class='hs-comment'>-- </span>
<a name="line-97"></a> <span class='hs-comment'>-- The boolean flag controls whether Gloss should cache the data</span>
<a name="line-98"></a> <span class='hs-comment'>-- between frames for speed. If you are programatically generating</span>
<a name="line-99"></a> <span class='hs-comment'>-- the image for each frame then use `False`. If you have loaded it</span>
<a name="line-100"></a> <span class='hs-comment'>-- from a file then use `True`.</span>
<a name="line-101"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Bitmap</span> <span class='hs-conid'>Int</span> <span class='hs-conid'>Int</span> <span class='hs-conid'>BitmapData</span> <span class='hs-conid'>Bool</span>
<a name="line-102"></a>
<a name="line-103"></a> <span class='hs-comment'>-- Color ------------------------------------------</span>
<a name="line-104"></a> <span class='hs-comment'>-- | A picture drawn with this color.</span>
<a name="line-105"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Color</span> <span class='hs-conid'>Color</span> <span class='hs-conid'>Picture</span>
<a name="line-106"></a>
<a name="line-107"></a> <span class='hs-comment'>-- Transforms -------------------------------------</span>
<a name="line-108"></a> <span class='hs-comment'>-- | A picture translated by the given x and y coordinates.</span>
<a name="line-109"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Translate</span> <span class='hs-conid'>Float</span> <span class='hs-conid'>Float</span> <span class='hs-conid'>Picture</span>
<a name="line-110"></a>
<a name="line-111"></a> <span class='hs-comment'>-- | A picture rotated clockwise by the given angle (in degrees).</span>
<a name="line-112"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Rotate</span> <span class='hs-conid'>Float</span> <span class='hs-conid'>Picture</span>
<a name="line-113"></a>
<a name="line-114"></a> <span class='hs-comment'>-- | A picture scaled by the given x and y factors.</span>
<a name="line-115"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Scale</span> <span class='hs-conid'>Float</span> <span class='hs-conid'>Float</span> <span class='hs-conid'>Picture</span>
<a name="line-116"></a>
<a name="line-117"></a> <span class='hs-comment'>-- More Pictures ----------------------------------</span>
<a name="line-118"></a> <span class='hs-comment'>-- | A picture consisting of several others.</span>
<a name="line-119"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Pictures</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Picture</span><span class='hs-keyglyph'>]</span>
<a name="line-120"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show</span><span class='hs-layout'>,</span> <span class='hs-conid'>Eq</span><span class='hs-layout'>)</span>
<a name="line-121"></a>
<a name="line-122"></a>
<a name="line-123"></a><a name="instance%20Monoid%20Picture"></a><span class='hs-comment'>-- Instances ------------------------------------------------------------------</span>
<a name="line-124"></a><a name="instance%20Monoid%20Picture"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Monoid</span> <span class='hs-conid'>Picture</span> <span class='hs-keyword'>where</span>
<a name="line-125"></a> <span class='hs-varid'>mempty</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>blank</span>
<a name="line-126"></a> <span class='hs-varid'>mappend</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Pictures</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-varid'>b</span><span class='hs-keyglyph'>]</span>
<a name="line-127"></a> <span class='hs-varid'>mconcat</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Pictures</span>
<a name="line-128"></a>
<a name="line-129"></a>
<a name="line-130"></a><span class='hs-comment'>-- Constructors ----------------------------------------------------------------</span>
<a name="line-131"></a><span class='hs-comment'>-- NOTE: The docs here should be identical to the ones on the constructors.</span>
<a name="line-132"></a>
<a name="line-133"></a><a name="blank"></a><span class='hs-comment'>-- | A blank picture, with nothing in it.</span>
<a name="line-134"></a><span class='hs-definition'>blank</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Picture</span>
<a name="line-135"></a><span class='hs-definition'>blank</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Blank</span>
<a name="line-136"></a>
<a name="line-137"></a><a name="polygon"></a><span class='hs-comment'>-- | A convex polygon filled with a solid color.</span>
<a name="line-138"></a><span class='hs-definition'>polygon</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Path</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span>
<a name="line-139"></a><span class='hs-definition'>polygon</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Polygon</span>
<a name="line-140"></a>
<a name="line-141"></a><a name="line"></a><span class='hs-comment'>-- | A line along an arbitrary path.</span>
<a name="line-142"></a><span class='hs-definition'>line</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Path</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span>
<a name="line-143"></a><span class='hs-definition'>line</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Line</span>
<a name="line-144"></a>
<a name="line-145"></a><a name="circle"></a><span class='hs-comment'>-- | A circle with the given radius.</span>
<a name="line-146"></a><span class='hs-definition'>circle</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span>
<a name="line-147"></a><span class='hs-definition'>circle</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Circle</span>
<a name="line-148"></a>
<a name="line-149"></a><a name="thickCircle"></a><span class='hs-comment'>-- | A circle with the given thickness and radius.</span>
<a name="line-150"></a><span class='hs-comment'>-- If the thickness is 0 then this is equivalent to `Circle`.</span>
<a name="line-151"></a><span class='hs-definition'>thickCircle</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span>
<a name="line-152"></a><span class='hs-definition'>thickCircle</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ThickCircle</span>
<a name="line-153"></a>
<a name="line-154"></a><a name="arc"></a><span class='hs-comment'>-- | A circular arc drawn counter-clockwise between two angles (in degrees) </span>
<a name="line-155"></a><span class='hs-comment'>-- at the given radius.</span>
<a name="line-156"></a><span class='hs-definition'>arc</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span>
<a name="line-157"></a><span class='hs-definition'>arc</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Arc</span>
<a name="line-158"></a>
<a name="line-159"></a><a name="thickArc"></a><span class='hs-comment'>-- | A circular arc drawn counter-clockwise between two angles (in degrees),</span>
<a name="line-160"></a><span class='hs-comment'>-- with the given radius and thickness.</span>
<a name="line-161"></a><span class='hs-comment'>-- If the thickness is 0 then this is equivalent to `Arc`.</span>
<a name="line-162"></a><span class='hs-definition'>thickArc</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span>
<a name="line-163"></a><span class='hs-definition'>thickArc</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ThickArc</span>
<a name="line-164"></a>
<a name="line-165"></a><a name="text"></a><span class='hs-comment'>-- | Some text to draw with a vector font.</span>
<a name="line-166"></a><span class='hs-definition'>text</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span>
<a name="line-167"></a><span class='hs-definition'>text</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Text</span>
<a name="line-168"></a>
<a name="line-169"></a><a name="bitmap"></a><span class='hs-comment'>-- | A bitmap image with a width, height and a Vector holding the </span>
<a name="line-170"></a><span class='hs-comment'>-- 32-bit RGBA bitmap data.</span>
<a name="line-171"></a><span class='hs-comment'>-- </span>
<a name="line-172"></a><span class='hs-comment'>-- The boolean flag controls whether Gloss should cache the data</span>
<a name="line-173"></a><span class='hs-comment'>-- between frames for speed.</span>
<a name="line-174"></a><span class='hs-comment'>-- If you are programatically generating the image for</span>
<a name="line-175"></a><span class='hs-comment'>-- each frame then use `False`. </span>
<a name="line-176"></a><span class='hs-comment'>-- If you have loaded it from a file then use `True`.</span>
<a name="line-177"></a><span class='hs-definition'>bitmap</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>BitmapData</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span>
<a name="line-178"></a><span class='hs-definition'>bitmap</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Bitmap</span>
<a name="line-179"></a>
<a name="line-180"></a><a name="color"></a><span class='hs-comment'>-- | A picture drawn with this color.</span>
<a name="line-181"></a><span class='hs-definition'>color</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Color</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span>
<a name="line-182"></a><span class='hs-definition'>color</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Color</span>
<a name="line-183"></a>
<a name="line-184"></a><a name="translate"></a><span class='hs-comment'>-- | A picture translated by the given x and y coordinates.</span>
<a name="line-185"></a><span class='hs-definition'>translate</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span>
<a name="line-186"></a><span class='hs-definition'>translate</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Translate</span>
<a name="line-187"></a>
<a name="line-188"></a><a name="rotate"></a><span class='hs-comment'>-- | A picture rotated clockwise by the given angle (in degrees).</span>
<a name="line-189"></a><span class='hs-definition'>rotate</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span>
<a name="line-190"></a><span class='hs-definition'>rotate</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Rotate</span>
<a name="line-191"></a>
<a name="line-192"></a><a name="scale"></a><span class='hs-comment'>-- | A picture scaled by the given x and y factors.</span>
<a name="line-193"></a><span class='hs-definition'>scale</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span>
<a name="line-194"></a><span class='hs-definition'>scale</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Scale</span>
<a name="line-195"></a>
<a name="line-196"></a><a name="pictures"></a><span class='hs-comment'>-- | A picture consisting of several others.</span>
<a name="line-197"></a><span class='hs-definition'>pictures</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Picture</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span>
<a name="line-198"></a><span class='hs-definition'>pictures</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Pictures</span>
<a name="line-199"></a>
<a name="line-200"></a>
<a name="line-201"></a><span class='hs-comment'>-- Bitmaps --------------------------------------------------------------------</span>
<a name="line-202"></a><span class='hs-comment'>-- | O(1). Use a `ForeignPtr` of RGBA data as a bitmap with the given</span>
<a name="line-203"></a><span class='hs-comment'>-- width and height.</span>
<a name="line-204"></a>
<a name="line-205"></a><a name="bitmapOfForeignPtr"></a><span class='hs-comment'>-- The boolean flag controls whether Gloss should cache the data</span>
<a name="line-206"></a><span class='hs-comment'>-- between frames for speed. If you are programatically generating</span>
<a name="line-207"></a><span class='hs-comment'>-- the image for each frame then use `False`. If you have loaded it</span>
<a name="line-208"></a><span class='hs-comment'>-- from a file then use `True`.</span>
<a name="line-209"></a><span class='hs-definition'>bitmapOfForeignPtr</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ForeignPtr</span> <span class='hs-conid'>Word8</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span>
<a name="line-210"></a><span class='hs-definition'>bitmapOfForeignPtr</span> <span class='hs-varid'>width</span> <span class='hs-varid'>height</span> <span class='hs-varid'>fptr</span> <span class='hs-varid'>cacheMe</span>
<a name="line-211"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>len</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>width</span> <span class='hs-varop'>*</span> <span class='hs-varid'>height</span> <span class='hs-varop'>*</span> <span class='hs-num'>4</span>
<a name="line-212"></a> <span class='hs-varid'>bdata</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BitmapData</span> <span class='hs-varid'>len</span> <span class='hs-varid'>fptr</span>
<a name="line-213"></a> <span class='hs-keyword'>in</span> <span class='hs-conid'>Bitmap</span> <span class='hs-varid'>width</span> <span class='hs-varid'>height</span> <span class='hs-varid'>bdata</span> <span class='hs-varid'>cacheMe</span>
<a name="line-214"></a>
<a name="line-215"></a>
<a name="line-216"></a><a name="bitmapOfByteString"></a><span class='hs-comment'>-- | O(size). Copy a `ByteString` of RGBA data into a bitmap with the given</span>
<a name="line-217"></a><span class='hs-comment'>-- width and height.</span>
<a name="line-218"></a><span class='hs-comment'>--</span>
<a name="line-219"></a><span class='hs-comment'>-- The boolean flag controls whether Gloss should cache the data</span>
<a name="line-220"></a><span class='hs-comment'>-- between frames for speed. If you are programatically generating</span>
<a name="line-221"></a><span class='hs-comment'>-- the image for each frame then use `False`. If you have loaded it</span>
<a name="line-222"></a><span class='hs-comment'>-- from a file then use `True`.</span>
<a name="line-223"></a><span class='hs-comment'>{-# NOINLINE bitmapOfByteString #-}</span>
<a name="line-224"></a><span class='hs-definition'>bitmapOfByteString</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ByteString</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span>
<a name="line-225"></a><span class='hs-definition'>bitmapOfByteString</span> <span class='hs-varid'>width</span> <span class='hs-varid'>height</span> <span class='hs-varid'>bs</span> <span class='hs-varid'>cacheMe</span>
<a name="line-226"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafePerformIO</span>
<a name="line-227"></a> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>len</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>width</span> <span class='hs-varop'>*</span> <span class='hs-varid'>height</span> <span class='hs-varop'>*</span> <span class='hs-num'>4</span>
<a name="line-228"></a> <span class='hs-varid'>ptr</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mallocBytes</span> <span class='hs-varid'>len</span>
<a name="line-229"></a> <span class='hs-varid'>fptr</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>newForeignPtr</span> <span class='hs-varid'>finalizerFree</span> <span class='hs-varid'>ptr</span>
<a name="line-230"></a>
<a name="line-231"></a> <span class='hs-conid'>BSU</span><span class='hs-varop'>.</span><span class='hs-varid'>unsafeUseAsCString</span> <span class='hs-varid'>bs</span>
<a name="line-232"></a> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>cstr</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>copyBytes</span> <span class='hs-varid'>ptr</span> <span class='hs-layout'>(</span><span class='hs-varid'>castPtr</span> <span class='hs-varid'>cstr</span><span class='hs-layout'>)</span> <span class='hs-varid'>len</span>
<a name="line-233"></a>
<a name="line-234"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>bdata</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BitmapData</span> <span class='hs-varid'>len</span> <span class='hs-varid'>fptr</span>
<a name="line-235"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Bitmap</span> <span class='hs-varid'>width</span> <span class='hs-varid'>height</span> <span class='hs-varid'>bdata</span> <span class='hs-varid'>cacheMe</span>
<a name="line-236"></a>
<a name="line-237"></a>
<a name="line-238"></a><a name="bitmapOfBMP"></a><span class='hs-comment'>-- | O(size). Copy a `BMP` file into a bitmap.</span>
<a name="line-239"></a><span class='hs-comment'>{-# NOINLINE bitmapOfBMP #-}</span>
<a name="line-240"></a><span class='hs-definition'>bitmapOfBMP</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>BMP</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span>
<a name="line-241"></a><span class='hs-definition'>bitmapOfBMP</span> <span class='hs-varid'>bmp</span>
<a name="line-242"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafePerformIO</span>
<a name="line-243"></a> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span> <span class='hs-keyword'>let</span> <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-varid'>bmpDimensions</span> <span class='hs-varid'>bmp</span>
<a name="line-244"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>bs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unpackBMPToRGBA32</span> <span class='hs-varid'>bmp</span>
<a name="line-245"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>len</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>width</span> <span class='hs-varop'>*</span> <span class='hs-varid'>height</span> <span class='hs-varop'>*</span> <span class='hs-num'>4</span>
<a name="line-246"></a>
<a name="line-247"></a> <span class='hs-varid'>ptr</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mallocBytes</span> <span class='hs-varid'>len</span>
<a name="line-248"></a> <span class='hs-varid'>fptr</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>newForeignPtr</span> <span class='hs-varid'>finalizerFree</span> <span class='hs-varid'>ptr</span>
<a name="line-249"></a>
<a name="line-250"></a> <span class='hs-conid'>BSU</span><span class='hs-varop'>.</span><span class='hs-varid'>unsafeUseAsCString</span> <span class='hs-varid'>bs</span>
<a name="line-251"></a> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>cstr</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>copyBytes</span> <span class='hs-varid'>ptr</span> <span class='hs-layout'>(</span><span class='hs-varid'>castPtr</span> <span class='hs-varid'>cstr</span><span class='hs-layout'>)</span> <span class='hs-varid'>len</span>
<a name="line-252"></a>
<a name="line-253"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>bdata</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BitmapData</span> <span class='hs-varid'>len</span> <span class='hs-varid'>fptr</span>
<a name="line-254"></a> <span class='hs-varid'>reverseRGBA</span> <span class='hs-varid'>bdata</span>
<a name="line-255"></a>
<a name="line-256"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Bitmap</span> <span class='hs-varid'>width</span> <span class='hs-varid'>height</span> <span class='hs-varid'>bdata</span> <span class='hs-conid'>True</span>
<a name="line-257"></a>
<a name="line-258"></a>
<a name="line-259"></a><a name="loadBMP"></a><span class='hs-comment'>-- | Load an uncompressed 24 or 32bit RGBA BMP file as a bitmap.</span>
<a name="line-260"></a><span class='hs-definition'>loadBMP</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-conid'>Picture</span>
<a name="line-261"></a><span class='hs-definition'>loadBMP</span> <span class='hs-varid'>filePath</span>
<a name="line-262"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>ebmp</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>readBMP</span> <span class='hs-varid'>filePath</span>
<a name="line-263"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>ebmp</span> <span class='hs-keyword'>of</span>
<a name="line-264"></a> <span class='hs-conid'>Left</span> <span class='hs-varid'>err</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>error</span> <span class='hs-varop'>$</span> <span class='hs-varid'>show</span> <span class='hs-varid'>err</span>
<a name="line-265"></a> <span class='hs-conid'>Right</span> <span class='hs-varid'>bmp</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>bitmapOfBMP</span> <span class='hs-varid'>bmp</span>
<a name="line-266"></a>
<a name="line-267"></a>
<a name="line-268"></a><a name="lineLoop"></a><span class='hs-comment'>-- Other Shapes ---------------------------------------------------------------</span>
<a name="line-269"></a><span class='hs-comment'>-- | A closed loop along a path.</span>
<a name="line-270"></a><span class='hs-definition'>lineLoop</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Path</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span>
<a name="line-271"></a><span class='hs-definition'>lineLoop</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Line</span> <span class='hs-conid'>[]</span>
<a name="line-272"></a><span class='hs-definition'>lineLoop</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Line</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-varop'>++</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-273"></a>
<a name="line-274"></a>
<a name="line-275"></a><a name="circleSolid"></a><span class='hs-comment'>-- Circles and Arcs -----------------------------------------------------------</span>
<a name="line-276"></a><span class='hs-comment'>-- | A solid circle with the given radius.</span>
<a name="line-277"></a><span class='hs-definition'>circleSolid</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span>
<a name="line-278"></a><span class='hs-definition'>circleSolid</span> <span class='hs-varid'>r</span>
<a name="line-279"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>thickCircle</span> <span class='hs-layout'>(</span><span class='hs-varid'>r</span><span class='hs-varop'>/</span><span class='hs-num'>2</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span>
<a name="line-280"></a>
<a name="line-281"></a>
<a name="line-282"></a><a name="arcSolid"></a><span class='hs-comment'>-- | A solid arc, drawn counter-clockwise between two angles at the given radius.</span>
<a name="line-283"></a><span class='hs-definition'>arcSolid</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span>
<a name="line-284"></a><span class='hs-definition'>arcSolid</span> <span class='hs-varid'>a1</span> <span class='hs-varid'>a2</span> <span class='hs-varid'>r</span>
<a name="line-285"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>thickArc</span> <span class='hs-varid'>a1</span> <span class='hs-varid'>a2</span> <span class='hs-layout'>(</span><span class='hs-varid'>r</span><span class='hs-varop'>/</span><span class='hs-num'>2</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span>
<a name="line-286"></a>
<a name="line-287"></a>
<a name="line-288"></a><a name="sectorWire"></a><span class='hs-comment'>-- | A wireframe sector of a circle. </span>
<a name="line-289"></a><span class='hs-comment'>-- An arc is draw counter-clockwise from the first to the second angle at</span>
<a name="line-290"></a><span class='hs-comment'>-- the given radius. Lines are drawn from the origin to the ends of the arc.</span>
<a name="line-291"></a><span class='hs-comment'>---</span>
<a name="line-292"></a><span class='hs-comment'>-- NOTE: We take the absolute value of the radius incase it's negative.</span>
<a name="line-293"></a><span class='hs-comment'>-- It would also make sense to draw the sector flipped around the </span>
<a name="line-294"></a><span class='hs-comment'>-- origin, but I think taking the absolute value will be less surprising</span>
<a name="line-295"></a><span class='hs-comment'>-- for the user.</span>
<a name="line-296"></a><span class='hs-comment'>-- </span>
<a name="line-297"></a><span class='hs-definition'>sectorWire</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span>
<a name="line-298"></a><span class='hs-definition'>sectorWire</span> <span class='hs-varid'>a1</span> <span class='hs-varid'>a2</span> <span class='hs-varid'>r_</span>
<a name="line-299"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>abs</span> <span class='hs-varid'>r_</span>
<a name="line-300"></a> <span class='hs-keyword'>in</span> <span class='hs-conid'>Pictures</span>
<a name="line-301"></a> <span class='hs-keyglyph'>[</span> <span class='hs-conid'>Arc</span> <span class='hs-varid'>a1</span> <span class='hs-varid'>a2</span> <span class='hs-varid'>r</span>
<a name="line-302"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Line</span> <span class='hs-keyglyph'>[</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-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varid'>r</span> <span class='hs-varop'>*</span> <span class='hs-varid'>cos</span> <span class='hs-layout'>(</span><span class='hs-varid'>degToRad</span> <span class='hs-varid'>a1</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>r</span> <span class='hs-varop'>*</span> <span class='hs-varid'>sin</span> <span class='hs-layout'>(</span><span class='hs-varid'>degToRad</span> <span class='hs-varid'>a1</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-303"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Line</span> <span class='hs-keyglyph'>[</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-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varid'>r</span> <span class='hs-varop'>*</span> <span class='hs-varid'>cos</span> <span class='hs-layout'>(</span><span class='hs-varid'>degToRad</span> <span class='hs-varid'>a2</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>r</span> <span class='hs-varop'>*</span> <span class='hs-varid'>sin</span> <span class='hs-layout'>(</span><span class='hs-varid'>degToRad</span> <span class='hs-varid'>a2</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>]</span>
<a name="line-304"></a>
<a name="line-305"></a>
<a name="line-306"></a><span class='hs-comment'>-- Rectangles -----------------------------------------------------------------</span>
<a name="line-307"></a><span class='hs-comment'>-- NOTE: Only the first of these rectangle functions has haddocks on the</span>
<a name="line-308"></a><span class='hs-comment'>-- arguments to reduce the amount of noise in the extracted docs.</span>
<a name="line-309"></a>
<a name="line-310"></a><a name="rectanglePath"></a><span class='hs-comment'>-- | A path representing a rectangle centered about the origin</span>
<a name="line-311"></a><span class='hs-definition'>rectanglePath</span>
<a name="line-312"></a> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Float</span> <span class='hs-comment'>-- ^ width of rectangle</span>
<a name="line-313"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Float</span> <span class='hs-comment'>-- ^ height of rectangle</span>
<a name="line-314"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Path</span>
<a name="line-315"></a><span class='hs-definition'>rectanglePath</span> <span class='hs-varid'>sizeX</span> <span class='hs-varid'>sizeY</span>
<a name="line-316"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>sx</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sizeX</span> <span class='hs-varop'>/</span> <span class='hs-num'>2</span>
<a name="line-317"></a> <span class='hs-varid'>sy</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sizeY</span> <span class='hs-varop'>/</span> <span class='hs-num'>2</span>
<a name="line-318"></a> <span class='hs-keyword'>in</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-varid'>sx</span><span class='hs-layout'>,</span> <span class='hs-comment'>-</span><span class='hs-varid'>sy</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-varid'>sx</span><span class='hs-layout'>,</span> <span class='hs-varid'>sy</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varid'>sx</span><span class='hs-layout'>,</span> <span class='hs-varid'>sy</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varid'>sx</span><span class='hs-layout'>,</span> <span class='hs-comment'>-</span><span class='hs-varid'>sy</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-319"></a>
<a name="line-320"></a>
<a name="line-321"></a><a name="rectangleWire"></a><span class='hs-comment'>-- | A wireframe rectangle centered about the origin.</span>
<a name="line-322"></a><span class='hs-definition'>rectangleWire</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span>
<a name="line-323"></a><span class='hs-definition'>rectangleWire</span> <span class='hs-varid'>sizeX</span> <span class='hs-varid'>sizeY</span>
<a name="line-324"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>lineLoop</span> <span class='hs-varop'>$</span> <span class='hs-varid'>rectanglePath</span> <span class='hs-varid'>sizeX</span> <span class='hs-varid'>sizeY</span>
<a name="line-325"></a>
<a name="line-326"></a>
<a name="line-327"></a><a name="rectangleUpperWire"></a><span class='hs-comment'>-- | A wireframe rectangle in the y > 0 half of the x-y plane.</span>
<a name="line-328"></a><span class='hs-definition'>rectangleUpperWire</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span>
<a name="line-329"></a><span class='hs-definition'>rectangleUpperWire</span> <span class='hs-varid'>sizeX</span> <span class='hs-varid'>sizeY</span>
<a name="line-330"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>lineLoop</span> <span class='hs-varop'>$</span> <span class='hs-varid'>rectangleUpperPath</span> <span class='hs-varid'>sizeX</span> <span class='hs-varid'>sizeY</span>
<a name="line-331"></a>
<a name="line-332"></a>
<a name="line-333"></a><a name="rectangleUpperPath"></a><span class='hs-comment'>-- | A path representing a rectangle in the y > 0 half of the x-y plane.</span>
<a name="line-334"></a><span class='hs-definition'>rectangleUpperPath</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Path</span>
<a name="line-335"></a><span class='hs-definition'>rectangleUpperPath</span> <span class='hs-varid'>sizeX</span> <span class='hs-varid'>sy</span>
<a name="line-336"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>sx</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sizeX</span> <span class='hs-varop'>/</span> <span class='hs-num'>2</span>
<a name="line-337"></a> <span class='hs-keyword'>in</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-varid'>sx</span><span class='hs-layout'>,</span> <span class='hs-num'>0</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-varid'>sx</span><span class='hs-layout'>,</span> <span class='hs-varid'>sy</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varid'>sx</span><span class='hs-layout'>,</span> <span class='hs-varid'>sy</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varid'>sx</span><span class='hs-layout'>,</span> <span class='hs-num'>0</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-338"></a>
<a name="line-339"></a>
<a name="line-340"></a><a name="rectangleSolid"></a><span class='hs-comment'>-- | A solid rectangle centered about the origin.</span>
<a name="line-341"></a><span class='hs-definition'>rectangleSolid</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span>
<a name="line-342"></a><span class='hs-definition'>rectangleSolid</span> <span class='hs-varid'>sizeX</span> <span class='hs-varid'>sizeY</span>
<a name="line-343"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Polygon</span> <span class='hs-varop'>$</span> <span class='hs-varid'>rectanglePath</span> <span class='hs-varid'>sizeX</span> <span class='hs-varid'>sizeY</span>
<a name="line-344"></a>
<a name="line-345"></a>
<a name="line-346"></a><a name="rectangleUpperSolid"></a><span class='hs-comment'>-- | A solid rectangle in the y > 0 half of the x-y plane.</span>
<a name="line-347"></a><span class='hs-definition'>rectangleUpperSolid</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Float</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Picture</span>
<a name="line-348"></a><span class='hs-definition'>rectangleUpperSolid</span> <span class='hs-varid'>sizeX</span> <span class='hs-varid'>sizeY</span>
<a name="line-349"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Polygon</span> <span class='hs-varop'>$</span> <span class='hs-varid'>rectangleUpperPath</span> <span class='hs-varid'>sizeX</span> <span class='hs-varid'>sizeY</span>
<a name="line-350"></a>
</pre></body>
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