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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE ScopedTypeVariables #-}</span>
<a name="line-2"></a>
<a name="line-3"></a><span class='hs-comment'>{-# LINE 2 "./Graphics/UI/Gtk/Gdk/Region.chs" #-}</span>
<a name="line-4"></a><span class='hs-comment'>-- -*-haskell-*-</span>
<a name="line-5"></a><span class='hs-comment'>-- GIMP Toolkit (GTK) Region</span>
<a name="line-6"></a><span class='hs-comment'>--</span>
<a name="line-7"></a><span class='hs-comment'>-- Author : Axel Simon</span>
<a name="line-8"></a><span class='hs-comment'>--</span>
<a name="line-9"></a><span class='hs-comment'>-- Created: 22 September 2002</span>
<a name="line-10"></a><span class='hs-comment'>--</span>
<a name="line-11"></a><span class='hs-comment'>-- Copyright (C) 2002-2005 Axel Simon</span>
<a name="line-12"></a><span class='hs-comment'>--</span>
<a name="line-13"></a><span class='hs-comment'>-- This library is free software; you can redistribute it and/or</span>
<a name="line-14"></a><span class='hs-comment'>-- modify it under the terms of the GNU Lesser General Public</span>
<a name="line-15"></a><span class='hs-comment'>-- License as published by the Free Software Foundation; either</span>
<a name="line-16"></a><span class='hs-comment'>-- version 2.1 of the License, or (at your option) any later version.</span>
<a name="line-17"></a><span class='hs-comment'>--</span>
<a name="line-18"></a><span class='hs-comment'>-- This library is distributed in the hope that it will be useful,</span>
<a name="line-19"></a><span class='hs-comment'>-- but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="line-20"></a><span class='hs-comment'>-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<a name="line-21"></a><span class='hs-comment'>-- Lesser General Public License for more details.</span>
<a name="line-22"></a><span class='hs-comment'>--</span>
<a name="line-23"></a><span class='hs-comment'>-- TODO</span>
<a name="line-24"></a><span class='hs-comment'>--</span>
<a name="line-25"></a><span class='hs-comment'>-- The Span functions and callbacks are not implemented since retrieving</span>
<a name="line-26"></a><span class='hs-comment'>-- a set of rectangles and working on them within Haskell seems to be easier.</span>
<a name="line-27"></a><span class='hs-comment'>--</span>
<a name="line-28"></a><span class='hs-comment'>-- |</span>
<a name="line-29"></a><span class='hs-comment'>-- Maintainer : gtk2hs-users@lists.sourceforge.net</span>
<a name="line-30"></a><span class='hs-comment'>-- Stability : provisional</span>
<a name="line-31"></a><span class='hs-comment'>-- Portability : portable (depends on GHC)</span>
<a name="line-32"></a><span class='hs-comment'>--</span>
<a name="line-33"></a><span class='hs-comment'>-- A set of rectangles describing areas to be redrawn.</span>
<a name="line-34"></a><span class='hs-comment'>--</span>
<a name="line-35"></a><span class='hs-comment'>-- * Regions consist of a set of non-overlapping rectangles. They are used to</span>
<a name="line-36"></a><span class='hs-comment'>-- specify the area of a window which needs updating.</span>
<a name="line-37"></a><span class='hs-comment'>--</span>
<a name="line-38"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>UI</span><span class='hs-varop'>.</span><span class='hs-conid'>Gtk</span><span class='hs-varop'>.</span><span class='hs-conid'>Gdk</span><span class='hs-varop'>.</span><span class='hs-conid'>Region</span> <span class='hs-layout'>(</span>
<a name="line-39"></a> <span class='hs-varid'>makeNewRegion</span><span class='hs-layout'>,</span>
<a name="line-40"></a> <span class='hs-conid'>Region</span><span class='hs-layout'>(</span><span class='hs-conid'>Region</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-41"></a> <span class='hs-varid'>regionNew</span><span class='hs-layout'>,</span>
<a name="line-42"></a> <span class='hs-conid'>FillRule</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-43"></a> <span class='hs-varid'>regionPolygon</span><span class='hs-layout'>,</span>
<a name="line-44"></a> <span class='hs-varid'>regionCopy</span><span class='hs-layout'>,</span>
<a name="line-45"></a> <span class='hs-varid'>regionRectangle</span><span class='hs-layout'>,</span>
<a name="line-46"></a> <span class='hs-varid'>regionGetClipbox</span><span class='hs-layout'>,</span>
<a name="line-47"></a> <span class='hs-varid'>regionGetRectangles</span><span class='hs-layout'>,</span>
<a name="line-48"></a> <span class='hs-varid'>regionEmpty</span><span class='hs-layout'>,</span>
<a name="line-49"></a> <span class='hs-varid'>regionEqual</span><span class='hs-layout'>,</span>
<a name="line-50"></a> <span class='hs-varid'>regionPointIn</span><span class='hs-layout'>,</span>
<a name="line-51"></a> <span class='hs-conid'>OverlapType</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-52"></a> <span class='hs-varid'>regionRectIn</span><span class='hs-layout'>,</span>
<a name="line-53"></a> <span class='hs-varid'>regionOffset</span><span class='hs-layout'>,</span>
<a name="line-54"></a> <span class='hs-varid'>regionShrink</span><span class='hs-layout'>,</span>
<a name="line-55"></a> <span class='hs-varid'>regionUnionWithRect</span><span class='hs-layout'>,</span>
<a name="line-56"></a> <span class='hs-varid'>regionIntersect</span><span class='hs-layout'>,</span>
<a name="line-57"></a> <span class='hs-varid'>regionUnion</span><span class='hs-layout'>,</span>
<a name="line-58"></a> <span class='hs-varid'>regionSubtract</span><span class='hs-layout'>,</span>
<a name="line-59"></a> <span class='hs-varid'>regionXor</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-60"></a>
<a name="line-61"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span> <span class='hs-layout'>(</span><span class='hs-varid'>liftM</span><span class='hs-layout'>)</span>
<a name="line-62"></a>
<a name="line-63"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Glib</span><span class='hs-varop'>.</span><span class='hs-conid'>FFI</span>
<a name="line-64"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>UI</span><span class='hs-varop'>.</span><span class='hs-conid'>Gtk</span><span class='hs-varop'>.</span><span class='hs-conid'>General</span><span class='hs-varop'>.</span><span class='hs-conid'>Structs</span> <span class='hs-layout'>(</span><span class='hs-conid'>Point</span><span class='hs-layout'>,</span> <span class='hs-conid'>Rectangle</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-65"></a>
<a name="line-66"></a>
<a name="line-67"></a><span class='hs-comment'>{-# LINE 65 "./Graphics/UI/Gtk/Gdk/Region.chs" #-}</span>
<a name="line-68"></a>
<a name="line-69"></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-layout'>(</span><span class='hs-conid'>Region</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-70"></a><span class='hs-comment'>{-# LINE 67 "./Graphics/UI/Gtk/Gdk/Region.chs" #-}</span>
<a name="line-71"></a>
<a name="line-72"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show</span> <span class='hs-conid'>Region</span> <span class='hs-keyword'>where</span>
<a name="line-73"></a> <span class='hs-varid'>show</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-varid'>unsafePerformIO</span> <span class='hs-layout'>(</span><span class='hs-varid'>regionGetRectangles</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-74"></a>
<a name="line-75"></a><a name="makeNewRegion"></a><span class='hs-comment'>-- Construct a region from a pointer.</span>
<a name="line-76"></a><span class='hs-comment'>--</span>
<a name="line-77"></a><span class='hs-definition'>makeNewRegion</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-78"></a><span class='hs-definition'>makeNewRegion</span> <span class='hs-varid'>rPtr</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-79"></a> <span class='hs-varid'>region</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>newForeignPtr</span> <span class='hs-varid'>rPtr</span> <span class='hs-varid'>region_destroy</span>
<a name="line-80"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>Region</span> <span class='hs-varid'>region</span><span class='hs-layout'>)</span>
<a name="line-81"></a>
<a name="line-82"></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'>"&gdk_region_destroy"</span>
<a name="line-83"></a> <span class='hs-varid'>region_destroy</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FinalizerPtr</span> <span class='hs-conid'>Region</span>
<a name="line-84"></a>
<a name="line-85"></a><a name="FillRule"></a><span class='hs-comment'>-- | Specify how to interpret a polygon.</span>
<a name="line-86"></a><a name="FillRule"></a><span class='hs-comment'>--</span>
<a name="line-87"></a><a name="FillRule"></a><span class='hs-comment'>-- * The flag determines what happens if a polygon has overlapping areas.</span>
<a name="line-88"></a><a name="FillRule"></a><span class='hs-comment'>--</span>
<a name="line-89"></a><a name="FillRule"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>FillRule</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>EvenOddRule</span>
<a name="line-90"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>WindingRule</span>
<a name="line-91"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Enum</span><span class='hs-layout'>)</span>
<a name="line-92"></a>
<a name="line-93"></a><span class='hs-comment'>{-# LINE 86 "./Graphics/UI/Gtk/Gdk/Region.chs" #-}</span>
<a name="line-94"></a>
<a name="line-95"></a><a name="OverlapType"></a><span class='hs-comment'>-- | How a rectangle is contained in a 'Region'.</span>
<a name="line-96"></a><a name="OverlapType"></a><span class='hs-comment'>--</span>
<a name="line-97"></a><a name="OverlapType"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>OverlapType</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>OverlapRectangleIn</span>
<a name="line-98"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>OverlapRectangleOut</span>
<a name="line-99"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>OverlapRectanglePart</span>
<a name="line-100"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Enum</span><span class='hs-layout'>)</span>
<a name="line-101"></a>
<a name="line-102"></a><span class='hs-comment'>{-# LINE 90 "./Graphics/UI/Gtk/Gdk/Region.chs" #-}</span>
<a name="line-103"></a>
<a name="line-104"></a><a name="regionNew"></a><span class='hs-comment'>-- | Create an empty region.</span>
<a name="line-105"></a><span class='hs-comment'>--</span>
<a name="line-106"></a><span class='hs-definition'>regionNew</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Region</span>
<a name="line-107"></a><span class='hs-definition'>regionNew</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-108"></a> <span class='hs-varid'>rPtr</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>gdk_region_new</span>
<a name="line-109"></a><span class='hs-comment'>{-# LINE 96 "./Graphics/UI/Gtk/Gdk/Region.chs" #-}</span>
<a name="line-110"></a> <span class='hs-varid'>makeNewRegion</span> <span class='hs-varid'>rPtr</span>
<a name="line-111"></a>
<a name="line-112"></a><a name="regionPolygon"></a><span class='hs-comment'>-- | Convert a polygon into a 'Region'.</span>
<a name="line-113"></a><span class='hs-comment'>--</span>
<a name="line-114"></a><span class='hs-definition'>regionPolygon</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-115"></a><span class='hs-definition'>regionPolygon</span> <span class='hs-varid'>points</span> <span class='hs-varid'>rule</span> <span class='hs-keyglyph'>=</span>
<a name="line-116"></a> <span class='hs-varid'>withArray</span> <span class='hs-layout'>(</span><span class='hs-varid'>concatMap</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>x</span><span class='hs-layout'>,</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>y</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-varid'>points</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span>
<a name="line-117"></a> <span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-varid'>aPtr</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-layout'>(</span><span class='hs-conid'>CInt</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-118"></a> <span class='hs-varid'>rPtr</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>gdk_region_polygon</span> <span class='hs-layout'>(</span><span class='hs-varid'>castPtr</span> <span class='hs-varid'>aPtr</span><span class='hs-layout'>)</span>
<a name="line-119"></a> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-layout'>(</span><span class='hs-varid'>length</span> <span class='hs-varid'>points</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span><span class='hs-varop'>.</span><span class='hs-varid'>fromEnum</span><span class='hs-layout'>)</span> <span class='hs-varid'>rule</span><span class='hs-layout'>)</span>
<a name="line-120"></a> <span class='hs-varid'>makeNewRegion</span> <span class='hs-varid'>rPtr</span>
<a name="line-121"></a>
<a name="line-122"></a><a name="regionCopy"></a><span class='hs-comment'>-- | Copy a 'Region'.</span>
<a name="line-123"></a><span class='hs-comment'>--</span>
<a name="line-124"></a><span class='hs-definition'>regionCopy</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'>Region</span>
<a name="line-125"></a><span class='hs-definition'>regionCopy</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-126"></a> <span class='hs-varid'>rPtr</span> <span class='hs-keyglyph'><-</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>Region</span> <span class='hs-varid'>arg1</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>arg1</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>argPtr1</span> <span class='hs-keyglyph'>-></span><span class='hs-varid'>gdk_region_copy</span> <span class='hs-varid'>argPtr1</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span>
<a name="line-127"></a> <span class='hs-varid'>makeNewRegion</span> <span class='hs-varid'>rPtr</span>
<a name="line-128"></a>
<a name="line-129"></a><a name="regionRectangle"></a><span class='hs-comment'>-- | Convert a rectangle to a 'Region'.</span>
<a name="line-130"></a><span class='hs-comment'>--</span>
<a name="line-131"></a><span class='hs-definition'>regionRectangle</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'>Region</span>
<a name="line-132"></a><span class='hs-definition'>regionRectangle</span> <span class='hs-varid'>rect</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>with</span> <span class='hs-varid'>rect</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>rectPtr</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-133"></a> <span class='hs-varid'>regPtr</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>gdk_region_rectangle</span> <span class='hs-layout'>(</span><span class='hs-varid'>castPtr</span> <span class='hs-varid'>rectPtr</span><span class='hs-layout'>)</span>
<a name="line-134"></a> <span class='hs-varid'>makeNewRegion</span> <span class='hs-varid'>regPtr</span>
<a name="line-135"></a>
<a name="line-136"></a><a name="regionGetClipbox"></a><span class='hs-comment'>-- | Smallest rectangle including the</span>
<a name="line-137"></a><span class='hs-comment'>-- 'Region'.</span>
<a name="line-138"></a><span class='hs-comment'>--</span>
<a name="line-139"></a><span class='hs-definition'>regionGetClipbox</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Rectangle</span>
<a name="line-140"></a><span class='hs-definition'>regionGetClipbox</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>alloca</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>rPtr</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-141"></a> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>Region</span> <span class='hs-varid'>arg1</span><span class='hs-layout'>)</span> <span class='hs-varid'>arg2</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>arg1</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>argPtr1</span> <span class='hs-keyglyph'>-></span><span class='hs-varid'>gdk_region_get_clipbox</span> <span class='hs-varid'>argPtr1</span> <span class='hs-varid'>arg2</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span> <span class='hs-layout'>(</span><span class='hs-varid'>castPtr</span> <span class='hs-varid'>rPtr</span><span class='hs-layout'>)</span>
<a name="line-142"></a> <span class='hs-varid'>peek</span> <span class='hs-varid'>rPtr</span>
<a name="line-143"></a>
<a name="line-144"></a><a name="regionGetRectangles"></a><span class='hs-comment'>-- | Turn the 'Region' into its rectangles.</span>
<a name="line-145"></a><span class='hs-comment'>--</span>
<a name="line-146"></a><span class='hs-comment'>-- A 'Region' is a set of horizontal bands. Each band consists of one or more</span>
<a name="line-147"></a><span class='hs-comment'>-- rectangles of the same height. No rectangles in a band touch.</span>
<a name="line-148"></a><span class='hs-comment'>--</span>
<a name="line-149"></a><span class='hs-definition'>regionGetRectangles</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Rectangle</span><span class='hs-keyglyph'>]</span>
<a name="line-150"></a><span class='hs-definition'>regionGetRectangles</span> <span class='hs-varid'>region</span> <span class='hs-keyglyph'>=</span>
<a name="line-151"></a> <span class='hs-varid'>alloca</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-varid'>rectPtrPtr</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Rectangle</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-152"></a> <span class='hs-varid'>alloca</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-varid'>iPtr</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-layout'>(</span><span class='hs-conid'>CInt</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-153"></a> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>Region</span> <span class='hs-varid'>arg1</span><span class='hs-layout'>)</span> <span class='hs-varid'>arg2</span> <span class='hs-varid'>arg3</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>arg1</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>argPtr1</span> <span class='hs-keyglyph'>-></span><span class='hs-varid'>gdk_region_get_rectangles</span> <span class='hs-varid'>argPtr1</span> <span class='hs-varid'>arg2</span> <span class='hs-varid'>arg3</span><span class='hs-layout'>)</span> <span class='hs-varid'>region</span> <span class='hs-layout'>(</span><span class='hs-varid'>castPtr</span> <span class='hs-varid'>rectPtrPtr</span><span class='hs-layout'>)</span> <span class='hs-varid'>iPtr</span>
<a name="line-154"></a> <span class='hs-varid'>size</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peek</span> <span class='hs-varid'>iPtr</span>
<a name="line-155"></a> <span class='hs-varid'>rectPtr</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peek</span> <span class='hs-varid'>rectPtrPtr</span>
<a name="line-156"></a> <span class='hs-varid'>rects</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peekArray</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>size</span><span class='hs-layout'>)</span> <span class='hs-varid'>rectPtr</span>
<a name="line-157"></a> <span class='hs-varid'>g_free</span> <span class='hs-layout'>(</span><span class='hs-varid'>castPtr</span> <span class='hs-varid'>rectPtr</span><span class='hs-layout'>)</span>
<a name="line-158"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>rects</span>
<a name="line-159"></a>
<a name="line-160"></a><a name="regionEmpty"></a><span class='hs-comment'>-- | Test if a 'Region' is empty.</span>
<a name="line-161"></a><span class='hs-comment'>--</span>
<a name="line-162"></a><span class='hs-definition'>regionEmpty</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-163"></a><span class='hs-definition'>regionEmpty</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>liftM</span> <span class='hs-varid'>toBool</span> <span class='hs-varop'>$</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>Region</span> <span class='hs-varid'>arg1</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>arg1</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>argPtr1</span> <span class='hs-keyglyph'>-></span><span class='hs-varid'>gdk_region_empty</span> <span class='hs-varid'>argPtr1</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span>
<a name="line-164"></a>
<a name="line-165"></a><a name="regionEqual"></a><span class='hs-comment'>-- | Compares two 'Region's for equality.</span>
<a name="line-166"></a><span class='hs-comment'>--</span>
<a name="line-167"></a><span class='hs-definition'>regionEqual</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-168"></a><span class='hs-definition'>regionEqual</span> <span class='hs-varid'>r1</span> <span class='hs-varid'>r2</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>liftM</span> <span class='hs-varid'>toBool</span> <span class='hs-varop'>$</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>Region</span> <span class='hs-varid'>arg1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Region</span> <span class='hs-varid'>arg2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>arg1</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>argPtr1</span> <span class='hs-keyglyph'>-></span><span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>arg2</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>argPtr2</span> <span class='hs-keyglyph'>-></span><span class='hs-varid'>gdk_region_equal</span> <span class='hs-varid'>argPtr1</span> <span class='hs-varid'>argPtr2</span><span class='hs-layout'>)</span> <span class='hs-varid'>r1</span> <span class='hs-varid'>r2</span>
<a name="line-169"></a>
<a name="line-170"></a><a name="regionPointIn"></a><span class='hs-comment'>-- | Checks if a point it is within a region.</span>
<a name="line-171"></a><span class='hs-comment'>--</span>
<a name="line-172"></a><span class='hs-definition'>regionPointIn</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Point</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Bool</span>
<a name="line-173"></a><span class='hs-definition'>regionPointIn</span> <span class='hs-varid'>r</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>liftM</span> <span class='hs-varid'>toBool</span> <span class='hs-varop'>$</span>
<a name="line-174"></a> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>Region</span> <span class='hs-varid'>arg1</span><span class='hs-layout'>)</span> <span class='hs-varid'>arg2</span> <span class='hs-varid'>arg3</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>arg1</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>argPtr1</span> <span class='hs-keyglyph'>-></span><span class='hs-varid'>gdk_region_point_in</span> <span class='hs-varid'>argPtr1</span> <span class='hs-varid'>arg2</span> <span class='hs-varid'>arg3</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span>
<a name="line-175"></a>
<a name="line-176"></a><a name="regionRectIn"></a><span class='hs-comment'>-- | Check if a rectangle is within a region.</span>
<a name="line-177"></a><span class='hs-comment'>--</span>
<a name="line-178"></a><span class='hs-definition'>regionRectIn</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Region</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Rectangle</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>OverlapType</span>
<a name="line-179"></a><span class='hs-definition'>regionRectIn</span> <span class='hs-varid'>reg</span> <span class='hs-varid'>rect</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>liftM</span> <span class='hs-layout'>(</span><span class='hs-varid'>toEnum</span><span class='hs-varop'>.</span><span class='hs-varid'>fromIntegral</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>with</span> <span class='hs-varid'>rect</span> <span class='hs-varop'>$</span>
<a name="line-180"></a> <span class='hs-keyglyph'>\</span><span class='hs-varid'>rPtr</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>Region</span> <span class='hs-varid'>arg1</span><span class='hs-layout'>)</span> <span class='hs-varid'>arg2</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>arg1</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>argPtr1</span> <span class='hs-keyglyph'>-></span><span class='hs-varid'>gdk_region_rect_in</span> <span class='hs-varid'>argPtr1</span> <span class='hs-varid'>arg2</span><span class='hs-layout'>)</span> <span class='hs-varid'>reg</span> <span class='hs-layout'>(</span><span class='hs-varid'>castPtr</span> <span class='hs-varid'>rPtr</span><span class='hs-layout'>)</span>
<a name="line-181"></a>
<a name="line-182"></a><a name="regionOffset"></a><span class='hs-comment'>-- | Move a region.</span>
<a name="line-183"></a><span class='hs-comment'>--</span>
<a name="line-184"></a><span class='hs-definition'>regionOffset</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Region</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'>IO</span> <span class='hs-conid'>()</span>
<a name="line-185"></a><span class='hs-definition'>regionOffset</span> <span class='hs-varid'>r</span> <span class='hs-varid'>dx</span> <span class='hs-varid'>dy</span> <span class='hs-keyglyph'>=</span>
<a name="line-186"></a> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>Region</span> <span class='hs-varid'>arg1</span><span class='hs-layout'>)</span> <span class='hs-varid'>arg2</span> <span class='hs-varid'>arg3</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>arg1</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>argPtr1</span> <span class='hs-keyglyph'>-></span><span class='hs-varid'>gdk_region_offset</span> <span class='hs-varid'>argPtr1</span> <span class='hs-varid'>arg2</span> <span class='hs-varid'>arg3</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>dx</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>dy</span><span class='hs-layout'>)</span>
<a name="line-187"></a>
<a name="line-188"></a><a name="regionShrink"></a><span class='hs-comment'>-- | Move a region.</span>
<a name="line-189"></a><span class='hs-comment'>--</span>
<a name="line-190"></a><span class='hs-comment'>-- * Positive values shrink the region, negative values expand it.</span>
<a name="line-191"></a><span class='hs-comment'>--</span>
<a name="line-192"></a><span class='hs-definition'>regionShrink</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Region</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'>IO</span> <span class='hs-conid'>()</span>
<a name="line-193"></a><span class='hs-definition'>regionShrink</span> <span class='hs-varid'>r</span> <span class='hs-varid'>dx</span> <span class='hs-varid'>dy</span> <span class='hs-keyglyph'>=</span>
<a name="line-194"></a> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>Region</span> <span class='hs-varid'>arg1</span><span class='hs-layout'>)</span> <span class='hs-varid'>arg2</span> <span class='hs-varid'>arg3</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>arg1</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>argPtr1</span> <span class='hs-keyglyph'>-></span><span class='hs-varid'>gdk_region_shrink</span> <span class='hs-varid'>argPtr1</span> <span class='hs-varid'>arg2</span> <span class='hs-varid'>arg3</span><span class='hs-layout'>)</span> <span class='hs-varid'>r</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>dx</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>dy</span><span class='hs-layout'>)</span>
<a name="line-195"></a>
<a name="line-196"></a><a name="regionUnionWithRect"></a><span class='hs-comment'>-- | Updates the region to include the rectangle.</span>
<a name="line-197"></a><span class='hs-comment'>--</span>
<a name="line-198"></a><span class='hs-definition'>regionUnionWithRect</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'>()</span>
<a name="line-199"></a><span class='hs-definition'>regionUnionWithRect</span> <span class='hs-varid'>reg</span> <span class='hs-varid'>rect</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>with</span> <span class='hs-varid'>rect</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>rPtr</span> <span class='hs-keyglyph'>-></span>
<a name="line-200"></a> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>Region</span> <span class='hs-varid'>arg1</span><span class='hs-layout'>)</span> <span class='hs-varid'>arg2</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>arg1</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>argPtr1</span> <span class='hs-keyglyph'>-></span><span class='hs-varid'>gdk_region_union_with_rect</span> <span class='hs-varid'>argPtr1</span> <span class='hs-varid'>arg2</span><span class='hs-layout'>)</span> <span class='hs-varid'>reg</span> <span class='hs-layout'>(</span><span class='hs-varid'>castPtr</span> <span class='hs-varid'>rPtr</span><span class='hs-layout'>)</span>
<a name="line-201"></a>
<a name="line-202"></a><a name="regionIntersect"></a><span class='hs-comment'>-- | Intersects one region with another.</span>
<a name="line-203"></a><span class='hs-comment'>--</span>
<a name="line-204"></a><span class='hs-comment'>-- * Changes @reg1@ to include the common areas of @reg1@</span>
<a name="line-205"></a><span class='hs-comment'>-- and @reg2@.</span>
<a name="line-206"></a><span class='hs-comment'>--</span>
<a name="line-207"></a><span class='hs-definition'>regionIntersect</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'>()</span>
<a name="line-208"></a><span class='hs-definition'>regionIntersect</span> <span class='hs-varid'>reg1</span> <span class='hs-varid'>reg2</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>Region</span> <span class='hs-varid'>arg1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Region</span> <span class='hs-varid'>arg2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>arg1</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>argPtr1</span> <span class='hs-keyglyph'>-></span><span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>arg2</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>argPtr2</span> <span class='hs-keyglyph'>-></span><span class='hs-varid'>gdk_region_intersect</span> <span class='hs-varid'>argPtr1</span> <span class='hs-varid'>argPtr2</span><span class='hs-layout'>)</span> <span class='hs-varid'>reg1</span> <span class='hs-varid'>reg2</span>
<a name="line-209"></a>
<a name="line-210"></a><a name="regionUnion"></a><span class='hs-comment'>-- | Unions one region with another.</span>
<a name="line-211"></a><span class='hs-comment'>--</span>
<a name="line-212"></a><span class='hs-comment'>-- * Changes @reg1@ to include @reg1@ and @reg2@.</span>
<a name="line-213"></a><span class='hs-comment'>--</span>
<a name="line-214"></a><span class='hs-definition'>regionUnion</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'>()</span>
<a name="line-215"></a><span class='hs-definition'>regionUnion</span> <span class='hs-varid'>reg1</span> <span class='hs-varid'>reg2</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>Region</span> <span class='hs-varid'>arg1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Region</span> <span class='hs-varid'>arg2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>arg1</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>argPtr1</span> <span class='hs-keyglyph'>-></span><span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>arg2</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>argPtr2</span> <span class='hs-keyglyph'>-></span><span class='hs-varid'>gdk_region_union</span> <span class='hs-varid'>argPtr1</span> <span class='hs-varid'>argPtr2</span><span class='hs-layout'>)</span> <span class='hs-varid'>reg1</span> <span class='hs-varid'>reg2</span>
<a name="line-216"></a>
<a name="line-217"></a><a name="regionSubtract"></a><span class='hs-comment'>-- | Removes pars of a 'Region'.</span>
<a name="line-218"></a><span class='hs-comment'>--</span>
<a name="line-219"></a><span class='hs-comment'>-- * Reduces the region @reg1@ so that is does not include any areas</span>
<a name="line-220"></a><span class='hs-comment'>-- of @reg2@.</span>
<a name="line-221"></a><span class='hs-comment'>--</span>
<a name="line-222"></a><span class='hs-definition'>regionSubtract</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'>()</span>
<a name="line-223"></a><span class='hs-definition'>regionSubtract</span> <span class='hs-varid'>reg1</span> <span class='hs-varid'>reg2</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>Region</span> <span class='hs-varid'>arg1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Region</span> <span class='hs-varid'>arg2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>arg1</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>argPtr1</span> <span class='hs-keyglyph'>-></span><span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>arg2</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>argPtr2</span> <span class='hs-keyglyph'>-></span><span class='hs-varid'>gdk_region_subtract</span> <span class='hs-varid'>argPtr1</span> <span class='hs-varid'>argPtr2</span><span class='hs-layout'>)</span> <span class='hs-varid'>reg1</span> <span class='hs-varid'>reg2</span>
<a name="line-224"></a>
<a name="line-225"></a><a name="regionXor"></a><span class='hs-comment'>-- | XORs two 'Region's.</span>
<a name="line-226"></a><span class='hs-comment'>--</span>
<a name="line-227"></a><span class='hs-comment'>-- * The exclusive or of two regions contains all areas which were not</span>
<a name="line-228"></a><span class='hs-comment'>-- overlapping. In other words, it is the union of the regions minus</span>
<a name="line-229"></a><span class='hs-comment'>-- their intersections.</span>
<a name="line-230"></a><span class='hs-comment'>--</span>
<a name="line-231"></a><span class='hs-definition'>regionXor</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'>()</span>
<a name="line-232"></a><span class='hs-definition'>regionXor</span> <span class='hs-varid'>reg1</span> <span class='hs-varid'>reg2</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>Region</span> <span class='hs-varid'>arg1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Region</span> <span class='hs-varid'>arg2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>arg1</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>argPtr1</span> <span class='hs-keyglyph'>-></span><span class='hs-varid'>withForeignPtr</span> <span class='hs-varid'>arg2</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>argPtr2</span> <span class='hs-keyglyph'>-></span><span class='hs-varid'>gdk_region_xor</span> <span class='hs-varid'>argPtr1</span> <span class='hs-varid'>argPtr2</span><span class='hs-layout'>)</span> <span class='hs-varid'>reg1</span> <span class='hs-varid'>reg2</span>
<a name="line-233"></a>
<a name="line-234"></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'>"gdk_region_new"</span>
<a name="line-235"></a> <span class='hs-varid'>gdk_region_new</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</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><span class='hs-layout'>)</span>
<a name="line-236"></a>
<a name="line-237"></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'>"gdk_region_polygon"</span>
<a name="line-238"></a> <span class='hs-varid'>gdk_region_polygon</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</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><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-239"></a>
<a name="line-240"></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'>"gdk_region_copy"</span>
<a name="line-241"></a> <span class='hs-varid'>gdk_region_copy</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</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><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-242"></a>
<a name="line-243"></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'>"gdk_region_rectangle"</span>
<a name="line-244"></a> <span class='hs-varid'>gdk_region_rectangle</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</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><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-245"></a>
<a name="line-246"></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'>"gdk_region_get_clipbox"</span>
<a name="line-247"></a> <span class='hs-varid'>gdk_region_get_clipbox</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-248"></a>
<a name="line-249"></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'>"gdk_region_get_rectangles"</span>
<a name="line-250"></a> <span class='hs-varid'>gdk_region_get_rectangles</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>CInt</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-251"></a>
<a name="line-252"></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'>"g_free"</span>
<a name="line-253"></a> <span class='hs-varid'>g_free</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-254"></a>
<a name="line-255"></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'>"gdk_region_empty"</span>
<a name="line-256"></a> <span class='hs-varid'>gdk_region_empty</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-257"></a>
<a name="line-258"></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'>"gdk_region_equal"</span>
<a name="line-259"></a> <span class='hs-varid'>gdk_region_equal</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-260"></a>
<a name="line-261"></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'>"gdk_region_point_in"</span>
<a name="line-262"></a> <span class='hs-varid'>gdk_region_point_in</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-263"></a>
<a name="line-264"></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'>"gdk_region_rect_in"</span>
<a name="line-265"></a> <span class='hs-varid'>gdk_region_rect_in</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span> <span class='hs-conid'>CInt</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-266"></a>
<a name="line-267"></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'>"gdk_region_offset"</span>
<a name="line-268"></a> <span class='hs-varid'>gdk_region_offset</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-269"></a>
<a name="line-270"></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'>"gdk_region_shrink"</span>
<a name="line-271"></a> <span class='hs-varid'>gdk_region_shrink</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>CInt</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-272"></a>
<a name="line-273"></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'>"gdk_region_union_with_rect"</span>
<a name="line-274"></a> <span class='hs-varid'>gdk_region_union_with_rect</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-275"></a>
<a name="line-276"></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'>"gdk_region_intersect"</span>
<a name="line-277"></a> <span class='hs-varid'>gdk_region_intersect</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-278"></a>
<a name="line-279"></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'>"gdk_region_union"</span>
<a name="line-280"></a> <span class='hs-varid'>gdk_region_union</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-281"></a>
<a name="line-282"></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'>"gdk_region_subtract"</span>
<a name="line-283"></a> <span class='hs-varid'>gdk_region_subtract</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-284"></a>
<a name="line-285"></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'>"gdk_region_xor"</span>
<a name="line-286"></a> <span class='hs-varid'>gdk_region_xor</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>Region</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>IO</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
</pre></body>
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