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<title>Graphics/Rendering/OpenGL/GL/Texturing/TextureUnit.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.Texturing.TextureUnit</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 for (un-)marshaling TextureUnit.</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'>Texturing</span><span class='hs-varop'>.</span><span class='hs-conid'>TextureUnit</span> <span class='hs-layout'>(</span>
<a name="line-17"></a> <span class='hs-conid'>TextureUnit</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>marshalTextureUnit</span><span class='hs-layout'>,</span> <span class='hs-varid'>unmarshalTextureUnit</span>
<a name="line-18"></a><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-19"></a>
<a name="line-20"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Ptr</span>
<a name="line-21"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>Storable</span>
<a name="line-22"></a><span class='hs-keyword'>import</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'>Raw</span><span class='hs-varop'>.</span><span class='hs-conid'>Core31</span>
<a name="line-23"></a>
<a name="line-24"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-25"></a>
<a name="line-26"></a><span class='hs-comment'>-- | Identifies a texture unit via its number, which must be in the range of</span>
<a name="line-27"></a><span class='hs-comment'>-- (0 .. 'maxTextureUnit').</span>
<a name="line-28"></a>
<a name="line-29"></a><a name="TextureUnit"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>TextureUnit</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TextureUnit</span> <span class='hs-conid'>GLuint</span>
<a name="line-30"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Eq</span><span class='hs-layout'>,</span> <span class='hs-conid'>Ord</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span> <span class='hs-layout'>)</span>
<a name="line-31"></a>
<a name="line-32"></a><a name="instance%20Storable%20TextureUnit"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Storable</span> <span class='hs-conid'>TextureUnit</span> <span class='hs-keyword'>where</span>
<a name="line-33"></a> <span class='hs-varid'>sizeOf</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</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-conid'>GLuint</span><span class='hs-layout'>)</span>
<a name="line-34"></a> <span class='hs-varid'>alignment</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>alignment</span> <span class='hs-layout'>(</span><span class='hs-varid'>undefined</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GLuint</span><span class='hs-layout'>)</span>
<a name="line-35"></a> <span class='hs-varid'>peek</span> <span class='hs-varid'>pt</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>peek</span> <span class='hs-layout'>(</span><span class='hs-varid'>castPtr</span> <span class='hs-varid'>pt</span><span class='hs-layout'>)</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-conid'>TextureUnit</span>
<a name="line-36"></a> <span class='hs-varid'>poke</span> <span class='hs-varid'>pt</span> <span class='hs-layout'>(</span><span class='hs-conid'>TextureUnit</span> <span class='hs-varid'>tu</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>poke</span> <span class='hs-layout'>(</span><span class='hs-varid'>castPtr</span> <span class='hs-varid'>pt</span><span class='hs-layout'>)</span> <span class='hs-varid'>tu</span>
<a name="line-37"></a> <span class='hs-varid'>peekByteOff</span> <span class='hs-varid'>pt</span> <span class='hs-varid'>off</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>peekByteOff</span> <span class='hs-varid'>pt</span> <span class='hs-varid'>off</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>.</span> <span class='hs-conid'>TextureUnit</span>
<a name="line-38"></a> <span class='hs-varid'>pokeByteOff</span> <span class='hs-varid'>pt</span> <span class='hs-varid'>off</span> <span class='hs-layout'>(</span><span class='hs-conid'>TextureUnit</span> <span class='hs-varid'>tu</span><span class='hs-layout'>)</span>
<a name="line-39"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>pokeByteOff</span> <span class='hs-varid'>pt</span> <span class='hs-varid'>off</span> <span class='hs-varid'>tu</span>
<a name="line-40"></a>
<a name="line-41"></a>
<a name="line-42"></a>
<a name="line-43"></a><a name="marshalTextureUnit"></a><span class='hs-definition'>marshalTextureUnit</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TextureUnit</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLenum</span>
<a name="line-44"></a><span class='hs-definition'>marshalTextureUnit</span> <span class='hs-layout'>(</span><span class='hs-conid'>TextureUnit</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>gl_TEXTURE0</span> <span class='hs-varop'>+</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>x</span>
<a name="line-45"></a>
<a name="line-46"></a><a name="unmarshalTextureUnit"></a><span class='hs-definition'>unmarshalTextureUnit</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TextureUnit</span>
<a name="line-47"></a><span class='hs-definition'>unmarshalTextureUnit</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TextureUnit</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-comment'>-</span> <span class='hs-varid'>gl_TEXTURE0</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
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