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<title>Graphics/Rendering/OpenGL/GL/PeekPoke.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>-- #hide</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.Rendering.OpenGL.GL.PeekPoke</span>
<a name="line-5"></a><span class='hs-comment'>-- Copyright : (c) Sven Panne 2002-2009</span>
<a name="line-6"></a><span class='hs-comment'>-- License : BSD-style (see the file libraries/OpenGL/LICENSE)</span>
<a name="line-7"></a><span class='hs-comment'>-- </span>
<a name="line-8"></a><span class='hs-comment'>-- Maintainer : sven.panne@aedion.de</span>
<a name="line-9"></a><span class='hs-comment'>-- Stability : stable</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'>-- This is a purely internal module with peek- and poke-related utilities.</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'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>OpenGL</span><span class='hs-varop'>.</span><span class='hs-conid'>GL</span><span class='hs-varop'>.</span><span class='hs-conid'>PeekPoke</span> <span class='hs-layout'>(</span>
<a name="line-17"></a> <span class='hs-varid'>poke1</span><span class='hs-layout'>,</span> <span class='hs-varid'>poke2</span><span class='hs-layout'>,</span> <span class='hs-varid'>poke3</span><span class='hs-layout'>,</span> <span class='hs-varid'>poke4</span><span class='hs-layout'>,</span>
<a name="line-18"></a> <span class='hs-varid'>peek1</span><span class='hs-layout'>,</span> <span class='hs-varid'>peek2</span><span class='hs-layout'>,</span> <span class='hs-varid'>peek3</span><span class='hs-layout'>,</span> <span class='hs-varid'>peek4</span><span class='hs-layout'>,</span>
<a name="line-19"></a> <span class='hs-varid'>peek1M</span><span class='hs-layout'>,</span> <span class='hs-varid'>peek2M</span><span class='hs-layout'>,</span> <span class='hs-varid'>peek3M</span><span class='hs-layout'>,</span> <span class='hs-varid'>peek4M</span>
<a name="line-20"></a><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-21"></a>
<a name="line-22"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Ptr</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Ptr</span> <span class='hs-layout'>)</span>
<a name="line-23"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Storable</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Storable</span><span class='hs-layout'>(</span><span class='hs-varid'>peekElemOff</span><span class='hs-layout'>,</span><span class='hs-varid'>pokeElemOff</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span>
<a name="line-24"></a>
<a name="line-25"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-26"></a><span class='hs-comment'>-- The implementation is little bit verbose/redundant, but seems to generate</span>
<a name="line-27"></a><span class='hs-comment'>-- better code than mapM/zipWithM_.</span>
<a name="line-28"></a>
<a name="line-29"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-30"></a>
<a name="line-31"></a><a name="poke1"></a><span class='hs-comment'>{-# INLINE poke1 #-}</span>
<a name="line-32"></a><span class='hs-definition'>poke1</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-33"></a><span class='hs-definition'>poke1</span> <span class='hs-varid'>ptr</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span>
<a name="line-34"></a> <span class='hs-varid'>pokeElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-num'>0</span> <span class='hs-varid'>x</span>
<a name="line-35"></a>
<a name="line-36"></a><a name="poke2"></a><span class='hs-comment'>{-# INLINE poke2 #-}</span>
<a name="line-37"></a><span class='hs-definition'>poke2</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-38"></a><span class='hs-definition'>poke2</span> <span class='hs-varid'>ptr</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-39"></a> <span class='hs-varid'>pokeElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-num'>0</span> <span class='hs-varid'>x</span>
<a name="line-40"></a> <span class='hs-varid'>pokeElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-num'>1</span> <span class='hs-varid'>y</span>
<a name="line-41"></a>
<a name="line-42"></a><a name="poke3"></a><span class='hs-comment'>{-# INLINE poke3 #-}</span>
<a name="line-43"></a><span class='hs-definition'>poke3</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-44"></a><span class='hs-definition'>poke3</span> <span class='hs-varid'>ptr</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-varid'>z</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-45"></a> <span class='hs-varid'>pokeElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-num'>0</span> <span class='hs-varid'>x</span>
<a name="line-46"></a> <span class='hs-varid'>pokeElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-num'>1</span> <span class='hs-varid'>y</span>
<a name="line-47"></a> <span class='hs-varid'>pokeElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-num'>2</span> <span class='hs-varid'>z</span>
<a name="line-48"></a>
<a name="line-49"></a><a name="poke4"></a><span class='hs-comment'>{-# INLINE poke4 #-}</span>
<a name="line-50"></a><span class='hs-definition'>poke4</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-51"></a><span class='hs-definition'>poke4</span> <span class='hs-varid'>ptr</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-varid'>z</span> <span class='hs-varid'>w</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-52"></a> <span class='hs-varid'>pokeElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-num'>0</span> <span class='hs-varid'>x</span>
<a name="line-53"></a> <span class='hs-varid'>pokeElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-num'>1</span> <span class='hs-varid'>y</span>
<a name="line-54"></a> <span class='hs-varid'>pokeElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-num'>2</span> <span class='hs-varid'>z</span>
<a name="line-55"></a> <span class='hs-varid'>pokeElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-num'>3</span> <span class='hs-varid'>w</span>
<a name="line-56"></a>
<a name="line-57"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-58"></a>
<a name="line-59"></a><a name="peek1"></a><span class='hs-comment'>{-# INLINE peek1 #-}</span>
<a name="line-60"></a><span class='hs-definition'>peek1</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span>
<a name="line-61"></a><span class='hs-definition'>peek1</span> <span class='hs-varid'>f</span> <span class='hs-varid'>ptr</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-62"></a> <span class='hs-varid'>x</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peekElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-num'>0</span>
<a name="line-63"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span>
<a name="line-64"></a>
<a name="line-65"></a><a name="peek2"></a><span class='hs-comment'>{-# INLINE peek2 #-}</span>
<a name="line-66"></a><span class='hs-definition'>peek2</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span>
<a name="line-67"></a><span class='hs-definition'>peek2</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>peek2M</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span>
<a name="line-68"></a>
<a name="line-69"></a><a name="peek3"></a><span class='hs-comment'>{-# INLINE peek3 #-}</span>
<a name="line-70"></a><span class='hs-definition'>peek3</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span>
<a name="line-71"></a><span class='hs-definition'>peek3</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>peek3M</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-varid'>z</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span>
<a name="line-72"></a>
<a name="line-73"></a><a name="peek4"></a><span class='hs-comment'>{-# INLINE peek4 #-}</span>
<a name="line-74"></a><span class='hs-definition'>peek4</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span>
<a name="line-75"></a><span class='hs-definition'>peek4</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>peek4M</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-varid'>z</span> <span class='hs-varid'>w</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-varid'>z</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span>
<a name="line-76"></a>
<a name="line-77"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-78"></a>
<a name="line-79"></a><a name="peek1M"></a><span class='hs-comment'>{-# INLINE peek1M #-}</span>
<a name="line-80"></a><span class='hs-definition'>peek1M</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span>
<a name="line-81"></a><span class='hs-definition'>peek1M</span> <span class='hs-varid'>f</span> <span class='hs-varid'>ptr</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-82"></a> <span class='hs-varid'>x</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peekElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-num'>0</span>
<a name="line-83"></a> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span>
<a name="line-84"></a>
<a name="line-85"></a><a name="peek2M"></a><span class='hs-comment'>{-# INLINE peek2M #-}</span>
<a name="line-86"></a><span class='hs-definition'>peek2M</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span>
<a name="line-87"></a><span class='hs-definition'>peek2M</span> <span class='hs-varid'>f</span> <span class='hs-varid'>ptr</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-88"></a> <span class='hs-varid'>x</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peekElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-num'>0</span>
<a name="line-89"></a> <span class='hs-varid'>y</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peekElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-num'>1</span>
<a name="line-90"></a> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span>
<a name="line-91"></a>
<a name="line-92"></a><a name="peek3M"></a><span class='hs-comment'>{-# INLINE peek3M #-}</span>
<a name="line-93"></a><span class='hs-definition'>peek3M</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span>
<a name="line-94"></a><span class='hs-definition'>peek3M</span> <span class='hs-varid'>f</span> <span class='hs-varid'>ptr</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-95"></a> <span class='hs-varid'>x</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peekElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-num'>0</span>
<a name="line-96"></a> <span class='hs-varid'>y</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peekElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-num'>1</span>
<a name="line-97"></a> <span class='hs-varid'>z</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peekElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-num'>2</span>
<a name="line-98"></a> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-varid'>z</span>
<a name="line-99"></a>
<a name="line-100"></a><a name="peek4M"></a><span class='hs-comment'>{-# INLINE peek4M #-}</span>
<a name="line-101"></a><span class='hs-definition'>peek4M</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Storable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>b</span>
<a name="line-102"></a><span class='hs-definition'>peek4M</span> <span class='hs-varid'>f</span> <span class='hs-varid'>ptr</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-103"></a> <span class='hs-varid'>x</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peekElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-num'>0</span>
<a name="line-104"></a> <span class='hs-varid'>y</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peekElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-num'>1</span>
<a name="line-105"></a> <span class='hs-varid'>z</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peekElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-num'>2</span>
<a name="line-106"></a> <span class='hs-varid'>w</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peekElemOff</span> <span class='hs-varid'>ptr</span> <span class='hs-num'>3</span>
<a name="line-107"></a> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-varid'>z</span> <span class='hs-varid'>w</span>
</pre></body>
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