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<pre><a name="line-1"></a><span class='hs-comment'>{-# OPTIONS_GHC -cpp -fglasgow-exts #-}</span>
<a name="line-2"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-3"></a><span class='hs-comment'>-- |</span>
<a name="line-4"></a><span class='hs-comment'>-- Module : Graphics.X11.Xlib.Region</span>
<a name="line-5"></a><span class='hs-comment'>-- Copyright : (c) Alastair Reid, 1999-2003</span>
<a name="line-6"></a><span class='hs-comment'>-- License : BSD-style (see the file libraries/base/LICENSE)</span>
<a name="line-7"></a><span class='hs-comment'>--</span>
<a name="line-8"></a><span class='hs-comment'>-- Maintainer : libraries@haskell.org</span>
<a name="line-9"></a><span class='hs-comment'>-- Stability : provisional</span>
<a name="line-10"></a><span class='hs-comment'>-- Portability : portable</span>
<a name="line-11"></a><span class='hs-comment'>--</span>
<a name="line-12"></a><span class='hs-comment'>-- A collection of FFI declarations for interfacing with Xlib Regions.</span>
<a name="line-13"></a><span class='hs-comment'>--</span>
<a name="line-14"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-15"></a>
<a name="line-16"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>X11</span><span class='hs-varop'>.</span><span class='hs-conid'>Xlib</span><span class='hs-varop'>.</span><span class='hs-conid'>Region</span><span class='hs-layout'>(</span>
<a name="line-17"></a> <span class='hs-conid'>Region</span><span class='hs-layout'>,</span>
<a name="line-18"></a>
<a name="line-19"></a> <span class='hs-conid'>RectInRegionResult</span><span class='hs-layout'>,</span>
<a name="line-20"></a> <span class='hs-varid'>rectangleOut</span><span class='hs-layout'>,</span>
<a name="line-21"></a> <span class='hs-varid'>rectangleIn</span><span class='hs-layout'>,</span>
<a name="line-22"></a> <span class='hs-varid'>rectanglePart</span><span class='hs-layout'>,</span>
<a name="line-23"></a>
<a name="line-24"></a> <span class='hs-varid'>createRegion</span><span class='hs-layout'>,</span>
<a name="line-25"></a> <span class='hs-varid'>polygonRegion</span><span class='hs-layout'>,</span>
<a name="line-26"></a> <span class='hs-varid'>intersectRegion</span><span class='hs-layout'>,</span>
<a name="line-27"></a> <span class='hs-varid'>subtractRegion</span><span class='hs-layout'>,</span>
<a name="line-28"></a> <span class='hs-varid'>unionRectWithRegion</span><span class='hs-layout'>,</span>
<a name="line-29"></a> <span class='hs-varid'>unionRegion</span><span class='hs-layout'>,</span>
<a name="line-30"></a> <span class='hs-varid'>xorRegion</span><span class='hs-layout'>,</span>
<a name="line-31"></a> <span class='hs-varid'>emptyRegion</span><span class='hs-layout'>,</span>
<a name="line-32"></a> <span class='hs-varid'>equalRegion</span><span class='hs-layout'>,</span>
<a name="line-33"></a> <span class='hs-varid'>pointInRegion</span><span class='hs-layout'>,</span>
<a name="line-34"></a> <span class='hs-varid'>rectInRegion</span><span class='hs-layout'>,</span>
<a name="line-35"></a> <span class='hs-varid'>clipBox</span><span class='hs-layout'>,</span>
<a name="line-36"></a> <span class='hs-varid'>offsetRegion</span><span class='hs-layout'>,</span>
<a name="line-37"></a> <span class='hs-varid'>shrinkRegion</span><span class='hs-layout'>,</span>
<a name="line-38"></a> <span class='hs-varid'>setRegion</span><span class='hs-layout'>,</span>
<a name="line-39"></a>
<a name="line-40"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-41"></a>
<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'>X11</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</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'>X11</span><span class='hs-varop'>.</span><span class='hs-conid'>Xlib</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span>
<a name="line-44"></a>
<a name="line-45"></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-46"></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-47"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span>
<a name="line-48"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Storable</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'>Alloc</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'>Marshal</span><span class='hs-varop'>.</span><span class='hs-conid'>Array</span>
<a name="line-51"></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-52"></a>
<a name="line-53"></a><span class='hs-cpp'>#if __GLASGOW_HASKELL__</span>
<a name="line-54"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Generics</span>
<a name="line-55"></a><span class='hs-cpp'>#endif</span>
<a name="line-56"></a>
<a name="line-57"></a><span class='hs-comment'>----------------------------------------------------------------</span>
<a name="line-58"></a><span class='hs-comment'>-- Regions</span>
<a name="line-59"></a><span class='hs-comment'>----------------------------------------------------------------</span>
<a name="line-60"></a>
<a name="line-61"></a><a name="Region"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Region</span> <span class='hs-layout'>(</span><span class='hs-conid'>ForeignPtr</span> <span class='hs-conid'>Region</span><span class='hs-layout'>)</span>
<a name="line-62"></a><span class='hs-cpp'>#if __GLASGOW_HASKELL__</span>
<a name="line-63"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span><span class='hs-layout'>,</span> <span class='hs-conid'>Ord</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span><span class='hs-layout'>,</span> <span class='hs-conid'>Typeable</span><span class='hs-layout'>,</span> <span class='hs-conid'>Data</span><span class='hs-layout'>)</span>
<a name="line-64"></a><span class='hs-cpp'>#else</span>
<a name="line-65"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span><span class='hs-layout'>,</span> <span class='hs-conid'>Ord</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span><span class='hs-layout'>)</span>
<a name="line-66"></a><span class='hs-cpp'>#endif</span>
<a name="line-67"></a>
<a name="line-68"></a><a name="withRegion"></a><span class='hs-definition'>withRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span>
<a name="line-69"></a><span class='hs-definition'>withRegion</span> <span class='hs-layout'>(</span><span class='hs-conid'>Region</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>r</span>
<a name="line-70"></a>
<a name="line-71"></a><a name="RectInRegionResult"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>RectInRegionResult</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>CInt</span>
<a name="line-72"></a>
<a name="line-73"></a><a name="rectangleOut"></a><span class='hs-comment'>-- Return values from XRectInRegion()</span>
<a name="line-74"></a><span class='hs-definition'>rectangleOut</span><span class='hs-layout'>,</span> <span class='hs-varid'>rectangleIn</span><span class='hs-layout'>,</span> <span class='hs-varid'>rectanglePart</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>RectInRegionResult</span>
<a name="line-75"></a><span class='hs-definition'>rectangleOut</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>0</span>
<a name="line-76"></a><a name="rectangleIn"></a><span class='hs-definition'>rectangleIn</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>1</span>
<a name="line-77"></a><a name="rectanglePart"></a><span class='hs-definition'>rectanglePart</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>2</span>
<a name="line-78"></a>
<a name="line-79"></a><span class='hs-comment'>----------------------------------------------------------------</span>
<a name="line-80"></a><span class='hs-comment'>-- Creating regions</span>
<a name="line-81"></a><span class='hs-comment'>----------------------------------------------------------------</span>
<a name="line-82"></a>
<a name="line-83"></a><span class='hs-comment'>-- regions deallocation is handled by the GC (ForeignPtr magic)</span>
<a name="line-84"></a><span class='hs-comment'>-- so we don't provide XDestroyRegion explicitly</span>
<a name="line-85"></a><span class='hs-comment'>-- no idea what the int is for</span>
<a name="line-86"></a><span class='hs-comment'>-- %fun XDestroyRegion :: Region -> IO Int</span>
<a name="line-87"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"HsXlib.h &XDestroyRegion"</span>
<a name="line-88"></a> <span class='hs-varid'>xDestroyRegionPtr</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FunPtr</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span>
<a name="line-89"></a>
<a name="line-90"></a><a name="makeRegion"></a><span class='hs-definition'>makeRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Region</span>
<a name="line-91"></a><span class='hs-definition'>makeRegion</span> <span class='hs-varid'>rp</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-92"></a> <span class='hs-varid'>r</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>newForeignPtr</span> <span class='hs-varid'>xDestroyRegionPtr</span> <span class='hs-varid'>rp</span>
<a name="line-93"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>Region</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span>
<a name="line-94"></a>
<a name="line-95"></a><span class='hs-comment'>-- an empty region</span>
<a name="line-96"></a><span class='hs-comment'>-- (often used as "out argument" to binary operators which return regions)</span>
<a name="line-97"></a>
<a name="line-98"></a><a name="createRegion"></a><span class='hs-comment'>-- | interface to the X11 library function @XCreateRegion()@.</span>
<a name="line-99"></a><span class='hs-definition'>createRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Region</span>
<a name="line-100"></a><span class='hs-definition'>createRegion</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-101"></a> <span class='hs-varid'>rp</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>xCreateRegion</span>
<a name="line-102"></a> <span class='hs-varid'>makeRegion</span> <span class='hs-varid'>rp</span>
<a name="line-103"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"HsXlib.h XCreateRegion"</span>
<a name="line-104"></a> <span class='hs-varid'>xCreateRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span><span class='hs-layout'>)</span>
<a name="line-105"></a>
<a name="line-106"></a><a name="polygonRegion"></a><span class='hs-comment'>-- | interface to the X11 library function @XPolygonRegion()@.</span>
<a name="line-107"></a><span class='hs-definition'>polygonRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Point</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FillRule</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Region</span>
<a name="line-108"></a><span class='hs-definition'>polygonRegion</span> <span class='hs-varid'>points</span> <span class='hs-varid'>fill_rule</span> <span class='hs-keyglyph'>=</span>
<a name="line-109"></a> <span class='hs-varid'>withArrayLen</span> <span class='hs-varid'>points</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>n</span> <span class='hs-varid'>point_arr</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-110"></a> <span class='hs-varid'>rp</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>xPolygonRegion</span> <span class='hs-varid'>point_arr</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-varid'>fill_rule</span>
<a name="line-111"></a> <span class='hs-varid'>makeRegion</span> <span class='hs-varid'>rp</span>
<a name="line-112"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"HsXlib.h XPolygonRegion"</span>
<a name="line-113"></a> <span class='hs-varid'>xPolygonRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Point</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FillRule</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span><span class='hs-layout'>)</span>
<a name="line-114"></a>
<a name="line-115"></a><span class='hs-comment'>----------------------------------------------------------------</span>
<a name="line-116"></a><span class='hs-comment'>-- Combining Regions</span>
<a name="line-117"></a><span class='hs-comment'>--</span>
<a name="line-118"></a><span class='hs-comment'>-- The usual shoddy state of Xlib documentation fails to mention</span>
<a name="line-119"></a><span class='hs-comment'>-- what the Int is for.</span>
<a name="line-120"></a><span class='hs-comment'>--</span>
<a name="line-121"></a><span class='hs-comment'>-- All operations overwrite the region in their third argument</span>
<a name="line-122"></a><span class='hs-comment'>-- which is usually a freshly created region.</span>
<a name="line-123"></a><span class='hs-comment'>----------------------------------------------------------------</span>
<a name="line-124"></a>
<a name="line-125"></a><a name="intersectRegion"></a><span class='hs-comment'>-- | interface to the X11 library function @XIntersectRegion()@.</span>
<a name="line-126"></a><span class='hs-definition'>intersectRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-127"></a><span class='hs-definition'>intersectRegion</span> <span class='hs-varid'>src1</span> <span class='hs-varid'>src2</span> <span class='hs-varid'>dest</span> <span class='hs-keyglyph'>=</span>
<a name="line-128"></a> <span class='hs-varid'>withRegion</span> <span class='hs-varid'>src1</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>src1_ptr</span> <span class='hs-keyglyph'>-></span>
<a name="line-129"></a> <span class='hs-varid'>withRegion</span> <span class='hs-varid'>src2</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>src2_ptr</span> <span class='hs-keyglyph'>-></span>
<a name="line-130"></a> <span class='hs-varid'>withRegion</span> <span class='hs-varid'>dest</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>dest_ptr</span> <span class='hs-keyglyph'>-></span>
<a name="line-131"></a> <span class='hs-varid'>xIntersectRegion</span> <span class='hs-varid'>src1_ptr</span> <span class='hs-varid'>src2_ptr</span> <span class='hs-varid'>dest_ptr</span>
<a name="line-132"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span>
<a name="line-133"></a> <span class='hs-str'>"HsXlib.h XIntersectRegion"</span> <span class='hs-varid'>xIntersectRegion</span> <span class='hs-keyglyph'>::</span>
<a name="line-134"></a> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-135"></a>
<a name="line-136"></a><a name="subtractRegion"></a><span class='hs-comment'>-- | interface to the X11 library function @XSubtractRegion()@.</span>
<a name="line-137"></a><span class='hs-definition'>subtractRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-138"></a><span class='hs-definition'>subtractRegion</span> <span class='hs-varid'>src1</span> <span class='hs-varid'>src2</span> <span class='hs-varid'>dest</span> <span class='hs-keyglyph'>=</span>
<a name="line-139"></a> <span class='hs-varid'>withRegion</span> <span class='hs-varid'>src1</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>src1_ptr</span> <span class='hs-keyglyph'>-></span>
<a name="line-140"></a> <span class='hs-varid'>withRegion</span> <span class='hs-varid'>src2</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>src2_ptr</span> <span class='hs-keyglyph'>-></span>
<a name="line-141"></a> <span class='hs-varid'>withRegion</span> <span class='hs-varid'>dest</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>dest_ptr</span> <span class='hs-keyglyph'>-></span>
<a name="line-142"></a> <span class='hs-varid'>xSubtractRegion</span> <span class='hs-varid'>src1_ptr</span> <span class='hs-varid'>src2_ptr</span> <span class='hs-varid'>dest_ptr</span>
<a name="line-143"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span>
<a name="line-144"></a> <span class='hs-str'>"HsXlib.h XSubtractRegion"</span> <span class='hs-varid'>xSubtractRegion</span> <span class='hs-keyglyph'>::</span>
<a name="line-145"></a> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-146"></a>
<a name="line-147"></a><a name="unionRectWithRegion"></a><span class='hs-comment'>-- | interface to the X11 library function @XUnionRectWithRegion()@.</span>
<a name="line-148"></a><span class='hs-definition'>unionRectWithRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Rectangle</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-149"></a><span class='hs-definition'>unionRectWithRegion</span> <span class='hs-varid'>rect</span> <span class='hs-varid'>src</span> <span class='hs-varid'>dest</span> <span class='hs-keyglyph'>=</span>
<a name="line-150"></a> <span class='hs-varid'>with</span> <span class='hs-varid'>rect</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>rect_ptr</span> <span class='hs-keyglyph'>-></span>
<a name="line-151"></a> <span class='hs-varid'>withRegion</span> <span class='hs-varid'>src</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>src_ptr</span> <span class='hs-keyglyph'>-></span>
<a name="line-152"></a> <span class='hs-varid'>withRegion</span> <span class='hs-varid'>dest</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>dest_ptr</span> <span class='hs-keyglyph'>-></span>
<a name="line-153"></a> <span class='hs-varid'>xUnionRectWithRegion</span> <span class='hs-varid'>rect_ptr</span> <span class='hs-varid'>src_ptr</span> <span class='hs-varid'>dest_ptr</span>
<a name="line-154"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span>
<a name="line-155"></a> <span class='hs-str'>"HsXlib.h XUnionRectWithRegion"</span> <span class='hs-varid'>xUnionRectWithRegion</span> <span class='hs-keyglyph'>::</span>
<a name="line-156"></a> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Rectangle</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-157"></a>
<a name="line-158"></a><a name="unionRegion"></a><span class='hs-comment'>-- | interface to the X11 library function @XUnionRegion()@.</span>
<a name="line-159"></a><span class='hs-definition'>unionRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-160"></a><span class='hs-definition'>unionRegion</span> <span class='hs-varid'>src1</span> <span class='hs-varid'>src2</span> <span class='hs-varid'>dest</span> <span class='hs-keyglyph'>=</span>
<a name="line-161"></a> <span class='hs-varid'>withRegion</span> <span class='hs-varid'>src1</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>src1_ptr</span> <span class='hs-keyglyph'>-></span>
<a name="line-162"></a> <span class='hs-varid'>withRegion</span> <span class='hs-varid'>src2</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>src2_ptr</span> <span class='hs-keyglyph'>-></span>
<a name="line-163"></a> <span class='hs-varid'>withRegion</span> <span class='hs-varid'>dest</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>dest_ptr</span> <span class='hs-keyglyph'>-></span>
<a name="line-164"></a> <span class='hs-varid'>xUnionRegion</span> <span class='hs-varid'>src1_ptr</span> <span class='hs-varid'>src2_ptr</span> <span class='hs-varid'>dest_ptr</span>
<a name="line-165"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span>
<a name="line-166"></a> <span class='hs-str'>"HsXlib.h XUnionRegion"</span> <span class='hs-varid'>xUnionRegion</span> <span class='hs-keyglyph'>::</span>
<a name="line-167"></a> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-168"></a>
<a name="line-169"></a><a name="xorRegion"></a><span class='hs-comment'>-- | interface to the X11 library function @XXorRegion()@.</span>
<a name="line-170"></a><span class='hs-definition'>xorRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-171"></a><span class='hs-definition'>xorRegion</span> <span class='hs-varid'>src1</span> <span class='hs-varid'>src2</span> <span class='hs-varid'>dest</span> <span class='hs-keyglyph'>=</span>
<a name="line-172"></a> <span class='hs-varid'>withRegion</span> <span class='hs-varid'>src1</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>src1_ptr</span> <span class='hs-keyglyph'>-></span>
<a name="line-173"></a> <span class='hs-varid'>withRegion</span> <span class='hs-varid'>src2</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>src2_ptr</span> <span class='hs-keyglyph'>-></span>
<a name="line-174"></a> <span class='hs-varid'>withRegion</span> <span class='hs-varid'>dest</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>dest_ptr</span> <span class='hs-keyglyph'>-></span>
<a name="line-175"></a> <span class='hs-varid'>xXorRegion</span> <span class='hs-varid'>src1_ptr</span> <span class='hs-varid'>src2_ptr</span> <span class='hs-varid'>dest_ptr</span>
<a name="line-176"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span>
<a name="line-177"></a> <span class='hs-str'>"HsXlib.h XXorRegion"</span> <span class='hs-varid'>xXorRegion</span> <span class='hs-keyglyph'>::</span>
<a name="line-178"></a> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-179"></a>
<a name="line-180"></a><span class='hs-comment'>----------------------------------------------------------------</span>
<a name="line-181"></a><span class='hs-comment'>-- Examining regions (tests, bounding boxes, etc)</span>
<a name="line-182"></a><span class='hs-comment'>----------------------------------------------------------------</span>
<a name="line-183"></a>
<a name="line-184"></a><a name="emptyRegion"></a><span class='hs-comment'>-- | interface to the X11 library function @XEmptyRegion()@.</span>
<a name="line-185"></a><span class='hs-definition'>emptyRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Bool</span>
<a name="line-186"></a><span class='hs-definition'>emptyRegion</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>withRegion</span> <span class='hs-varid'>r</span> <span class='hs-varid'>xEmptyRegion</span>
<a name="line-187"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"HsXlib.h XEmptyRegion"</span>
<a name="line-188"></a> <span class='hs-varid'>xEmptyRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Bool</span>
<a name="line-189"></a>
<a name="line-190"></a><a name="equalRegion"></a><span class='hs-comment'>-- | interface to the X11 library function @XEqualRegion()@.</span>
<a name="line-191"></a><span class='hs-definition'>equalRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Bool</span>
<a name="line-192"></a><span class='hs-definition'>equalRegion</span> <span class='hs-varid'>r1</span> <span class='hs-varid'>r2</span> <span class='hs-keyglyph'>=</span>
<a name="line-193"></a> <span class='hs-varid'>withRegion</span> <span class='hs-varid'>r1</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>rp1</span> <span class='hs-keyglyph'>-></span>
<a name="line-194"></a> <span class='hs-varid'>withRegion</span> <span class='hs-varid'>r2</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>rp2</span> <span class='hs-keyglyph'>-></span>
<a name="line-195"></a> <span class='hs-varid'>xEqualRegion</span> <span class='hs-varid'>rp1</span> <span class='hs-varid'>rp2</span>
<a name="line-196"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"HsXlib.h XEqualRegion"</span>
<a name="line-197"></a> <span class='hs-varid'>xEqualRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Bool</span>
<a name="line-198"></a>
<a name="line-199"></a><a name="pointInRegion"></a><span class='hs-comment'>-- | interface to the X11 library function @XPointInRegion()@.</span>
<a name="line-200"></a><span class='hs-definition'>pointInRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Point</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Bool</span>
<a name="line-201"></a><span class='hs-definition'>pointInRegion</span> <span class='hs-varid'>r</span> <span class='hs-layout'>(</span><span class='hs-conid'>Point</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-202"></a> <span class='hs-varid'>withRegion</span> <span class='hs-varid'>r</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>rp</span> <span class='hs-keyglyph'>-></span>
<a name="line-203"></a> <span class='hs-varid'>xPointInRegion</span> <span class='hs-varid'>rp</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span>
<a name="line-204"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"HsXlib.h XPointInRegion"</span>
<a name="line-205"></a> <span class='hs-varid'>xPointInRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Position</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Position</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Bool</span>
<a name="line-206"></a>
<a name="line-207"></a><a name="rectInRegion"></a><span class='hs-comment'>-- | interface to the X11 library function @XRectInRegion()@.</span>
<a name="line-208"></a><span class='hs-definition'>rectInRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Rectangle</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>RectInRegionResult</span>
<a name="line-209"></a><span class='hs-definition'>rectInRegion</span> <span class='hs-varid'>r</span> <span class='hs-layout'>(</span><span class='hs-conid'>Rectangle</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-varid'>w</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-210"></a> <span class='hs-varid'>withRegion</span> <span class='hs-varid'>r</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>rp</span> <span class='hs-keyglyph'>-></span>
<a name="line-211"></a> <span class='hs-varid'>xRectInRegion</span> <span class='hs-varid'>rp</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-varid'>w</span> <span class='hs-varid'>h</span>
<a name="line-212"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"HsXlib.h XRectInRegion"</span>
<a name="line-213"></a> <span class='hs-varid'>xRectInRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Position</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Position</span> <span class='hs-keyglyph'>-></span>
<a name="line-214"></a> <span class='hs-conid'>Dimension</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Dimension</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>RectInRegionResult</span>
<a name="line-215"></a>
<a name="line-216"></a><span class='hs-comment'>-- I have no idea what the int is for</span>
<a name="line-217"></a>
<a name="line-218"></a><a name="clipBox"></a><span class='hs-comment'>-- | interface to the X11 library function @XClipBox()@.</span>
<a name="line-219"></a><span class='hs-definition'>clipBox</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Rectangle</span><span class='hs-layout'>,</span><span class='hs-conid'>CInt</span><span class='hs-layout'>)</span>
<a name="line-220"></a><span class='hs-definition'>clipBox</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span>
<a name="line-221"></a> <span class='hs-varid'>withRegion</span> <span class='hs-varid'>r</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>rp</span> <span class='hs-keyglyph'>-></span>
<a name="line-222"></a> <span class='hs-varid'>alloca</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>rect_ptr</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-223"></a> <span class='hs-varid'>res</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>xClipBox</span> <span class='hs-varid'>rp</span> <span class='hs-varid'>rect_ptr</span>
<a name="line-224"></a> <span class='hs-varid'>rect</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peek</span> <span class='hs-varid'>rect_ptr</span>
<a name="line-225"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>rect</span><span class='hs-layout'>,</span> <span class='hs-varid'>res</span><span class='hs-layout'>)</span>
<a name="line-226"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"HsXlib.h XClipBox"</span>
<a name="line-227"></a> <span class='hs-varid'>xClipBox</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Rectangle</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-228"></a>
<a name="line-229"></a><span class='hs-comment'>----------------------------------------------------------------</span>
<a name="line-230"></a><span class='hs-comment'>-- Modifying regions</span>
<a name="line-231"></a><span class='hs-comment'>-- (If you use any of these, you can't make regions look like</span>
<a name="line-232"></a><span class='hs-comment'>-- first class data structures.)</span>
<a name="line-233"></a><span class='hs-comment'>----------------------------------------------------------------</span>
<a name="line-234"></a>
<a name="line-235"></a><span class='hs-comment'>-- translate region</span>
<a name="line-236"></a>
<a name="line-237"></a><a name="offsetRegion"></a><span class='hs-comment'>-- | interface to the X11 library function @XOffsetRegion()@.</span>
<a name="line-238"></a><span class='hs-definition'>offsetRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Point</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-239"></a><span class='hs-definition'>offsetRegion</span> <span class='hs-varid'>r</span> <span class='hs-layout'>(</span><span class='hs-conid'>Point</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-240"></a> <span class='hs-varid'>withRegion</span> <span class='hs-varid'>r</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>rp</span> <span class='hs-keyglyph'>-></span>
<a name="line-241"></a> <span class='hs-varid'>xOffsetRegion</span> <span class='hs-varid'>rp</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span>
<a name="line-242"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"HsXlib.h XOffsetRegion"</span>
<a name="line-243"></a> <span class='hs-varid'>xOffsetRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Position</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Position</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-244"></a>
<a name="line-245"></a><span class='hs-comment'>-- increase size of region by +ve or -ve number of pixels</span>
<a name="line-246"></a><span class='hs-comment'>-- while preserving the centre of the region (ie half the pixels</span>
<a name="line-247"></a><span class='hs-comment'>-- come off the left, and half off the right)</span>
<a name="line-248"></a>
<a name="line-249"></a><a name="shrinkRegion"></a><span class='hs-comment'>-- | interface to the X11 library function @XShrinkRegion()@.</span>
<a name="line-250"></a><span class='hs-definition'>shrinkRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Point</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-251"></a><span class='hs-definition'>shrinkRegion</span> <span class='hs-varid'>r</span> <span class='hs-layout'>(</span><span class='hs-conid'>Point</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-252"></a> <span class='hs-varid'>withRegion</span> <span class='hs-varid'>r</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>rp</span> <span class='hs-keyglyph'>-></span>
<a name="line-253"></a> <span class='hs-varid'>xShrinkRegion</span> <span class='hs-varid'>rp</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span>
<a name="line-254"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"HsXlib.h XShrinkRegion"</span>
<a name="line-255"></a> <span class='hs-varid'>xShrinkRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Position</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Position</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-256"></a>
<a name="line-257"></a><span class='hs-comment'>----------------------------------------------------------------</span>
<a name="line-258"></a><span class='hs-comment'>-- Graphics Context</span>
<a name="line-259"></a><span class='hs-comment'>----------------------------------------------------------------</span>
<a name="line-260"></a>
<a name="line-261"></a><span class='hs-comment'>-- set clip mask of GC</span>
<a name="line-262"></a>
<a name="line-263"></a><a name="setRegion"></a><span class='hs-comment'>-- | interface to the X11 library function @XSetRegion()@.</span>
<a name="line-264"></a><span class='hs-definition'>setRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Display</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GC</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-265"></a><span class='hs-definition'>setRegion</span> <span class='hs-varid'>disp</span> <span class='hs-varid'>gc</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span>
<a name="line-266"></a> <span class='hs-varid'>withRegion</span> <span class='hs-varid'>r</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>rp</span> <span class='hs-keyglyph'>-></span>
<a name="line-267"></a> <span class='hs-varid'>xSetRegion</span> <span class='hs-varid'>disp</span> <span class='hs-varid'>gc</span> <span class='hs-varid'>rp</span>
<a name="line-268"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-keyword'>ccall</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"HsXlib.h XSetRegion"</span>
<a name="line-269"></a> <span class='hs-varid'>xSetRegion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Display</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GC</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span>
<a name="line-270"></a>
<a name="line-271"></a><span class='hs-comment'>----------------------------------------------------------------</span>
<a name="line-272"></a><span class='hs-comment'>-- End</span>
<a name="line-273"></a><span class='hs-comment'>----------------------------------------------------------------</span>
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