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<title>Graphics/Rendering/OpenGL/GLU/Mipmapping.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-2"></a><span class='hs-comment'>-- |</span>
<a name="line-3"></a><span class='hs-comment'>-- Module : Graphics.Rendering.OpenGL.GLU.Mipmapping</span>
<a name="line-4"></a><span class='hs-comment'>-- Copyright : (c) Sven Panne 2002-2009</span>
<a name="line-5"></a><span class='hs-comment'>-- License : BSD-style (see the file libraries/OpenGL/LICENSE)</span>
<a name="line-6"></a><span class='hs-comment'>-- </span>
<a name="line-7"></a><span class='hs-comment'>-- Maintainer : sven.panne@aedion.de</span>
<a name="line-8"></a><span class='hs-comment'>-- Stability : stable</span>
<a name="line-9"></a><span class='hs-comment'>-- Portability : portable</span>
<a name="line-10"></a><span class='hs-comment'>--</span>
<a name="line-11"></a><span class='hs-comment'>-- This module corresponds to chapter 3 (Mipmapping) of the GLU specs.</span>
<a name="line-12"></a><span class='hs-comment'>--</span>
<a name="line-13"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-14"></a>
<a name="line-15"></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'>GLU</span><span class='hs-varop'>.</span><span class='hs-conid'>Mipmapping</span> <span class='hs-layout'>(</span>
<a name="line-16"></a> <span class='hs-varid'>scaleImage</span><span class='hs-layout'>,</span> <span class='hs-varid'>build1DMipmaps</span><span class='hs-layout'>,</span> <span class='hs-varid'>build2DMipmaps</span>
<a name="line-17"></a><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-18"></a>
<a name="line-19"></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-20"></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'>GL</span><span class='hs-varop'>.</span><span class='hs-conid'>BasicTypes</span> <span class='hs-layout'>(</span> <span class='hs-conid'>GLsizei</span><span class='hs-layout'>,</span> <span class='hs-conid'>GLint</span><span class='hs-layout'>,</span> <span class='hs-conid'>GLenum</span> <span class='hs-layout'>)</span>
<a name="line-21"></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'>GL</span><span class='hs-varop'>.</span><span class='hs-conid'>CoordTrans</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Size</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</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'>GL</span><span class='hs-varop'>.</span><span class='hs-conid'>PixelData</span> <span class='hs-layout'>(</span> <span class='hs-conid'>PixelData</span><span class='hs-layout'>,</span> <span class='hs-varid'>withPixelData</span> <span class='hs-layout'>)</span>
<a name="line-23"></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'>GL</span><span class='hs-varop'>.</span><span class='hs-conid'>Texturing</span><span class='hs-varop'>.</span><span class='hs-conid'>PixelInternalFormat</span> <span class='hs-layout'>(</span>
<a name="line-24"></a> <span class='hs-conid'>PixelInternalFormat</span><span class='hs-layout'>,</span> <span class='hs-varid'>marshalPixelInternalFormat</span> <span class='hs-layout'>)</span>
<a name="line-25"></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'>GL</span><span class='hs-varop'>.</span><span class='hs-conid'>Texturing</span><span class='hs-varop'>.</span><span class='hs-conid'>TextureTarget</span> <span class='hs-layout'>(</span>
<a name="line-26"></a> <span class='hs-conid'>TextureTarget</span><span class='hs-layout'>,</span> <span class='hs-varid'>marshalTextureTarget</span> <span class='hs-layout'>)</span>
<a name="line-27"></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'>GLU</span><span class='hs-varop'>.</span><span class='hs-conid'>ErrorsInternal</span> <span class='hs-layout'>(</span> <span class='hs-varid'>recordInvalidValue</span> <span class='hs-layout'>)</span>
<a name="line-28"></a>
<a name="line-29"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-30"></a><span class='hs-comment'>-- Section 3.1 (Image Scaling)</span>
<a name="line-31"></a>
<a name="line-32"></a><a name="scaleImage"></a><span class='hs-definition'>scaleImage</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Size</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PixelData</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Size</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PixelData</span> <span class='hs-varid'>b</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'>scaleImage</span> <span class='hs-layout'>(</span><span class='hs-conid'>Size</span> <span class='hs-varid'>widthIn</span> <span class='hs-varid'>heightIn</span><span class='hs-layout'>)</span> <span class='hs-varid'>pdIn</span> <span class='hs-layout'>(</span><span class='hs-conid'>Size</span> <span class='hs-varid'>widthOut</span> <span class='hs-varid'>heightOut</span><span class='hs-layout'>)</span> <span class='hs-varid'>pdOut</span> <span class='hs-keyglyph'>=</span>
<a name="line-34"></a> <span class='hs-varid'>withPixelData</span> <span class='hs-varid'>pdIn</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>fIn</span> <span class='hs-varid'>dIn</span> <span class='hs-varid'>pIn</span> <span class='hs-keyglyph'>-></span>
<a name="line-35"></a> <span class='hs-varid'>withPixelData</span> <span class='hs-varid'>pdOut</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>fOut</span> <span class='hs-varid'>dOut</span> <span class='hs-varid'>pOut</span> <span class='hs-keyglyph'>-></span>
<a name="line-36"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>fIn</span> <span class='hs-varop'>==</span> <span class='hs-varid'>fOut</span>
<a name="line-37"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>gluScaleImage</span>
<a name="line-38"></a> <span class='hs-varid'>fIn</span> <span class='hs-varid'>widthIn</span> <span class='hs-varid'>heightIn</span> <span class='hs-varid'>dIn</span> <span class='hs-varid'>pIn</span> <span class='hs-varid'>widthOut</span> <span class='hs-varid'>heightOut</span> <span class='hs-varid'>dOut</span> <span class='hs-varid'>pOut</span>
<a name="line-39"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>recordInvalidValue</span>
<a name="line-40"></a>
<a name="line-41"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"gluScaleImage"</span> <span class='hs-varid'>gluScaleImage</span> <span class='hs-keyglyph'>::</span>
<a name="line-42"></a> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLsizei</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLsizei</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>a</span>
<a name="line-43"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLsizei</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLsizei</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-44"></a>
<a name="line-45"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-46"></a><span class='hs-comment'>-- Section 3.2 (Automatic Mipmapping)</span>
<a name="line-47"></a><span class='hs-comment'>-- Missing for GLU 1.3: gluBuild3DMipmaps, gluBuild{1,2,3}DMipmapLevels</span>
<a name="line-48"></a>
<a name="line-49"></a><a name="build1DMipmaps"></a><span class='hs-definition'>build1DMipmaps</span> <span class='hs-keyglyph'>::</span>
<a name="line-50"></a> <span class='hs-conid'>TextureTarget</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PixelInternalFormat</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLsizei</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PixelData</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'>build1DMipmaps</span> <span class='hs-varid'>target</span> <span class='hs-varid'>internalFormat</span> <span class='hs-varid'>height</span> <span class='hs-varid'>pd</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-52"></a> <span class='hs-varid'>withPixelData</span> <span class='hs-varid'>pd</span> <span class='hs-varop'>$</span>
<a name="line-53"></a> <span class='hs-varid'>gluBuild1DMipmaps</span>
<a name="line-54"></a> <span class='hs-layout'>(</span><span class='hs-varid'>marshalTextureTarget</span> <span class='hs-varid'>target</span><span class='hs-layout'>)</span>
<a name="line-55"></a> <span class='hs-layout'>(</span><span class='hs-varid'>marshalPixelInternalFormat</span> <span class='hs-varid'>internalFormat</span><span class='hs-layout'>)</span>
<a name="line-56"></a> <span class='hs-varid'>height</span>
<a name="line-57"></a> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span> <span class='hs-comment'>-- TODO: Should we use the return value?</span>
<a name="line-58"></a>
<a name="line-59"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"gluBuild1DMipmaps"</span> <span class='hs-varid'>gluBuild1DMipmaps</span> <span class='hs-keyglyph'>::</span>
<a name="line-60"></a> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLsizei</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLenum</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-conid'>GLint</span>
<a name="line-61"></a>
<a name="line-62"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-63"></a>
<a name="line-64"></a><a name="build2DMipmaps"></a><span class='hs-definition'>build2DMipmaps</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TextureTarget</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PixelInternalFormat</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLsizei</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLsizei</span>
<a name="line-65"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PixelData</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-66"></a><span class='hs-definition'>build2DMipmaps</span> <span class='hs-varid'>target</span> <span class='hs-varid'>internalFormat</span> <span class='hs-varid'>width</span> <span class='hs-varid'>height</span> <span class='hs-varid'>pd</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-67"></a> <span class='hs-varid'>withPixelData</span> <span class='hs-varid'>pd</span> <span class='hs-varop'>$</span>
<a name="line-68"></a> <span class='hs-varid'>gluBuild2DMipmaps</span>
<a name="line-69"></a> <span class='hs-layout'>(</span><span class='hs-varid'>marshalTextureTarget</span> <span class='hs-varid'>target</span><span class='hs-layout'>)</span>
<a name="line-70"></a> <span class='hs-layout'>(</span><span class='hs-varid'>marshalPixelInternalFormat</span> <span class='hs-varid'>internalFormat</span><span class='hs-layout'>)</span>
<a name="line-71"></a> <span class='hs-varid'>width</span> <span class='hs-varid'>height</span>
<a name="line-72"></a> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span> <span class='hs-comment'>-- TODO: Should we use the return value?</span>
<a name="line-73"></a>
<a name="line-74"></a><span class='hs-keyword'>foreign</span> <span class='hs-keyword'>import</span> <span class='hs-conid'>CALLCONV</span> <span class='hs-keyword'>unsafe</span> <span class='hs-str'>"gluBuild2DMipmaps"</span> <span class='hs-varid'>gluBuild2DMipmaps</span> <span class='hs-keyglyph'>::</span>
<a name="line-75"></a> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLsizei</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLsizei</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLenum</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-conid'>GLint</span>
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