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<title>Graphics/UI/Gtk/Gdk/PixbufData.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE CPP, ScopedTypeVariables, FlexibleInstances, MultiParamTypeClasses #-}</span>
<a name="line-2"></a><span class='hs-comment'>{-# OPTIONS_HADDOCK hide #-}</span>
<a name="line-3"></a><span class='hs-comment'>-- -*-haskell-*-</span>
<a name="line-4"></a><span class='hs-comment'>-- GIMP Toolkit (GTK) Pixbuf as Array</span>
<a name="line-5"></a><span class='hs-comment'>--</span>
<a name="line-6"></a><span class='hs-comment'>-- Author : Ciancia, Axel Simon</span>
<a name="line-7"></a><span class='hs-comment'>--</span>
<a name="line-8"></a><span class='hs-comment'>-- Created: 26 March 2002</span>
<a name="line-9"></a><span class='hs-comment'>--</span>
<a name="line-10"></a><span class='hs-comment'>-- Copyright (C) 2002-2005 Axel Simon</span>
<a name="line-11"></a><span class='hs-comment'>--</span>
<a name="line-12"></a><span class='hs-comment'>-- This library is free software; you can redistribute it and/or</span>
<a name="line-13"></a><span class='hs-comment'>-- modify it under the terms of the GNU Lesser General Public</span>
<a name="line-14"></a><span class='hs-comment'>-- License as published by the Free Software Foundation; either</span>
<a name="line-15"></a><span class='hs-comment'>-- version 2.1 of the License, or (at your option) any later version.</span>
<a name="line-16"></a><span class='hs-comment'>--</span>
<a name="line-17"></a><span class='hs-comment'>-- This library is distributed in the hope that it will be useful,</span>
<a name="line-18"></a><span class='hs-comment'>-- but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="line-19"></a><span class='hs-comment'>-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<a name="line-20"></a><span class='hs-comment'>-- Lesser General Public License for more details.</span>
<a name="line-21"></a><span class='hs-comment'>--</span>
<a name="line-22"></a><span class='hs-comment'>-- |</span>
<a name="line-23"></a><span class='hs-comment'>-- Maintainer : gtk2hs-users@lists.sourceforge.net</span>
<a name="line-24"></a><span class='hs-comment'>-- Stability : provisional</span>
<a name="line-25"></a><span class='hs-comment'>-- Portability : no (uses MTC, depends on internal GHC module)</span>
<a name="line-26"></a><span class='hs-comment'>--</span>
<a name="line-27"></a><span class='hs-comment'>-- 'PixbufData' exposes 'Pixbuf's as mutable array.</span>
<a name="line-28"></a><span class='hs-comment'>--</span>
<a name="line-29"></a>
<a name="line-30"></a><span class='hs-comment'>-- #hide</span>
<a name="line-31"></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'>PixbufData</span> <span class='hs-layout'>(</span>
<a name="line-32"></a> <span class='hs-conid'>PixbufData</span><span class='hs-layout'>,</span>
<a name="line-33"></a> <span class='hs-varid'>mkPixbufData</span>
<a name="line-34"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-35"></a>
<a name="line-36"></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-37"></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'>Types</span>
<a name="line-38"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Ix</span>
<a name="line-39"></a><span class='hs-comment'>-- internal module of GHC</span>
<a name="line-40"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Array</span><span class='hs-varop'>.</span><span class='hs-conid'>Base</span> <span class='hs-layout'>(</span> <span class='hs-conid'>MArray</span><span class='hs-layout'>,</span> <span class='hs-varid'>newArray</span><span class='hs-layout'>,</span> <span class='hs-varid'>newArray_</span><span class='hs-layout'>,</span> <span class='hs-varid'>unsafeRead</span><span class='hs-layout'>,</span> <span class='hs-varid'>unsafeWrite</span><span class='hs-layout'>,</span>
<a name="line-41"></a><span class='hs-cpp'>#if __GLASGOW_HASKELL__ < 605</span>
<a name="line-42"></a> <span class='hs-conid'>HasBounds</span><span class='hs-layout'>,</span> <span class='hs-varid'>bounds</span>
<a name="line-43"></a><span class='hs-cpp'>#else</span>
<a name="line-44"></a> <span class='hs-varid'>getBounds</span>
<a name="line-45"></a><span class='hs-cpp'>#endif</span>
<a name="line-46"></a><span class='hs-cpp'>#if __GLASGOW_HASKELL__ >= 608</span>
<a name="line-47"></a> <span class='hs-layout'>,</span><span class='hs-varid'>getNumElements</span>
<a name="line-48"></a><span class='hs-cpp'>#endif</span>
<a name="line-49"></a> <span class='hs-layout'>)</span>
<a name="line-50"></a>
<a name="line-51"></a><a name="PixbufData"></a><span class='hs-comment'>-- | An array that stored the raw pixel data of a 'Pixbuf'.</span>
<a name="line-52"></a><a name="PixbufData"></a><span class='hs-comment'>--</span>
<a name="line-53"></a><a name="PixbufData"></a><span class='hs-comment'>-- * See 'Graphics.UI.Gtk.Gdk.Pixbuf.pixbufGetPixels'.</span>
<a name="line-54"></a><a name="PixbufData"></a><span class='hs-comment'>--</span>
<a name="line-55"></a><a name="PixbufData"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Ix</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>PixbufData</span> <span class='hs-varid'>i</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PixbufData</span> <span class='hs-varop'>!</span><span class='hs-conid'>Pixbuf</span>
<a name="line-56"></a> <span class='hs-comment'>{-# UNPACK #-}</span> <span class='hs-varop'>!</span><span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-57"></a> <span class='hs-varop'>!</span><span class='hs-layout'>(</span><span class='hs-varid'>i</span><span class='hs-layout'>,</span><span class='hs-varid'>i</span><span class='hs-layout'>)</span>
<a name="line-58"></a> <span class='hs-comment'>{-# UNPACK #-}</span> <span class='hs-varop'>!</span><span class='hs-conid'>Int</span>
<a name="line-59"></a>
<a name="line-60"></a><a name="mkPixbufData"></a><span class='hs-definition'>mkPixbufData</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Pixbuf</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PixbufData</span> <span class='hs-conid'>Int</span> <span class='hs-varid'>e</span>
<a name="line-61"></a><span class='hs-definition'>mkPixbufData</span> <span class='hs-varid'>pb</span> <span class='hs-layout'>(</span><span class='hs-varid'>ptr</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>size</span> <span class='hs-keyglyph'>=</span>
<a name="line-62"></a> <span class='hs-conid'>PixbufData</span> <span class='hs-varid'>pb</span> <span class='hs-varid'>ptr</span> <span class='hs-layout'>(</span><span class='hs-num'>0</span><span class='hs-layout'>,</span> <span class='hs-varid'>count</span><span class='hs-layout'>)</span> <span class='hs-varid'>count</span>
<a name="line-63"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>count</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varop'>`div`</span> <span class='hs-varid'>sizeOf</span> <span class='hs-layout'>(</span><span class='hs-varid'>undefined</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-64"></a>
<a name="line-65"></a><span class='hs-cpp'>#if __GLASGOW_HASKELL__ < 605</span>
<a name="line-66"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>HasBounds</span> <span class='hs-conid'>PixbufData</span> <span class='hs-keyword'>where</span>
<a name="line-67"></a> <span class='hs-varid'>bounds</span> <span class='hs-layout'>(</span><span class='hs-conid'>PixbufData</span> <span class='hs-varid'>pb</span> <span class='hs-varid'>ptr</span> <span class='hs-varid'>bd</span> <span class='hs-varid'>cnt</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>bd</span>
<a name="line-68"></a><span class='hs-cpp'>#endif</span>
<a name="line-69"></a>
<a name="line-70"></a><span class='hs-comment'>-- | 'PixbufData' is a mutable array.</span>
<a name="line-71"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>MArray</span> <span class='hs-conid'>PixbufData</span> <span class='hs-varid'>e</span> <span class='hs-conid'>IO</span> <span class='hs-keyword'>where</span>
<a name="line-72"></a> <span class='hs-varid'>newArray</span> <span class='hs-layout'>(</span><span class='hs-varid'>l</span><span class='hs-layout'>,</span><span class='hs-varid'>u</span><span class='hs-layout'>)</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>error</span> <span class='hs-str'>"Gtk.Gdk.Pixbuf.newArray: not implemented"</span>
<a name="line-73"></a> <span class='hs-varid'>newArray_</span> <span class='hs-layout'>(</span><span class='hs-varid'>l</span><span class='hs-layout'>,</span><span class='hs-varid'>u</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>error</span> <span class='hs-str'>"Gtk.Gdk.Pixbuf.newArray_: not implemented"</span>
<a name="line-74"></a> <span class='hs-comment'>{-# INLINE unsafeRead #-}</span>
<a name="line-75"></a> <span class='hs-varid'>unsafeRead</span> <span class='hs-layout'>(</span><span class='hs-conid'>PixbufData</span> <span class='hs-layout'>(</span><span class='hs-conid'>Pixbuf</span> <span class='hs-varid'>pb</span><span class='hs-layout'>)</span> <span class='hs-varid'>pixPtr</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-varid'>idx</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-76"></a> <span class='hs-varid'>e</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peekElemOff</span> <span class='hs-varid'>pixPtr</span> <span class='hs-varid'>idx</span>
<a name="line-77"></a> <span class='hs-varid'>touchForeignPtr</span> <span class='hs-varid'>pb</span>
<a name="line-78"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>e</span>
<a name="line-79"></a> <span class='hs-comment'>{-# INLINE unsafeWrite #-}</span>
<a name="line-80"></a> <span class='hs-varid'>unsafeWrite</span> <span class='hs-layout'>(</span><span class='hs-conid'>PixbufData</span> <span class='hs-layout'>(</span><span class='hs-conid'>Pixbuf</span> <span class='hs-varid'>pb</span><span class='hs-layout'>)</span> <span class='hs-varid'>pixPtr</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-varid'>idx</span> <span class='hs-varid'>elem</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-81"></a> <span class='hs-varid'>pokeElemOff</span> <span class='hs-varid'>pixPtr</span> <span class='hs-varid'>idx</span> <span class='hs-varid'>elem</span>
<a name="line-82"></a> <span class='hs-varid'>touchForeignPtr</span> <span class='hs-varid'>pb</span>
<a name="line-83"></a><span class='hs-cpp'>#if __GLASGOW_HASKELL__ >= 605</span>
<a name="line-84"></a> <span class='hs-comment'>{-# INLINE getBounds #-}</span>
<a name="line-85"></a> <span class='hs-varid'>getBounds</span> <span class='hs-layout'>(</span><span class='hs-conid'>PixbufData</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>bd</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varid'>bd</span>
<a name="line-86"></a><span class='hs-cpp'>#endif</span>
<a name="line-87"></a><span class='hs-cpp'>#if __GLASGOW_HASKELL__ >= 608</span>
<a name="line-88"></a> <span class='hs-comment'>{-# INLINE getNumElements #-}</span>
<a name="line-89"></a> <span class='hs-varid'>getNumElements</span> <span class='hs-layout'>(</span><span class='hs-conid'>PixbufData</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>count</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varid'>count</span>
<a name="line-90"></a><span class='hs-cpp'>#endif</span>
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