<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html> <head> <!-- Generated by HsColour, http://www.cs.york.ac.uk/fp/darcs/hscolour/ --> <title>Graphics/Rendering/OpenGL/GL/Feedback.hs</title> <link type='text/css' rel='stylesheet' href='hscolour.css' /> </head> <body> <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.GL.Feedback</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 section 5.3 (Feedback) of the OpenGL 2.1 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'>GL</span><span class='hs-varop'>.</span><span class='hs-conid'>Feedback</span> <span class='hs-layout'>(</span> <a name="line-16"></a> <span class='hs-conid'>FeedbackToken</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'>VertexInfo</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'>ColorInfo</span><span class='hs-layout'>,</span> <span class='hs-conid'>FeedbackType</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <a name="line-17"></a> <span class='hs-varid'>getFeedbackTokens</span><span class='hs-layout'>,</span> <span class='hs-conid'>PassThroughValue</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'>passThrough</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'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span> <span class='hs-layout'>(</span> <span class='hs-varid'>liftM2</span><span class='hs-layout'>,</span> <span class='hs-varid'>liftM3</span><span class='hs-layout'>,</span> <span class='hs-varid'>liftM4</span> <span class='hs-layout'>)</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'>Marshal</span><span class='hs-varop'>.</span><span class='hs-conid'>Array</span> <span class='hs-layout'>(</span> <span class='hs-varid'>allocaArray</span> <span class='hs-layout'>)</span> <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> <span class='hs-varid'>plusPtr</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'>sizeOf</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span> <a name="line-24"></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> <a name="line-25"></a> <span class='hs-conid'>GLenum</span><span class='hs-layout'>,</span> <span class='hs-conid'>GLint</span><span class='hs-layout'>,</span> <span class='hs-conid'>GLsizei</span><span class='hs-layout'>,</span> <span class='hs-conid'>GLfloat</span> <span class='hs-layout'>)</span> <a name="line-26"></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'>IOState</span> <span class='hs-layout'>(</span> <a name="line-27"></a> <span class='hs-conid'>IOState</span><span class='hs-layout'>,</span> <span class='hs-varid'>getIOState</span><span class='hs-layout'>,</span> <span class='hs-varid'>peekIOState</span><span class='hs-layout'>,</span> <span class='hs-varid'>evalIOState</span><span class='hs-layout'>,</span> <span class='hs-varid'>nTimes</span> <span class='hs-layout'>)</span> <a name="line-28"></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'>RenderMode</span> <span class='hs-layout'>(</span> <span class='hs-varid'>withRenderMode</span> <span class='hs-layout'>)</span> <a name="line-29"></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'>Selection</span> <span class='hs-layout'>(</span> <span class='hs-conid'>RenderMode</span><span class='hs-layout'>(</span><span class='hs-conid'>Feedback</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span> <a name="line-30"></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'>StateVar</span> <span class='hs-layout'>(</span> <span class='hs-conid'>HasGetter</span><span class='hs-layout'>(</span><span class='hs-varid'>get</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span> <a name="line-31"></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'>VertexSpec</span> <span class='hs-layout'>(</span> <a name="line-32"></a> <span class='hs-conid'>Vertex2</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'>Vertex3</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'>Vertex4</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'>Index1</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'>Color4</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <a name="line-33"></a> <span class='hs-conid'>TexCoord4</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'>rgbaMode</span> <span class='hs-layout'>)</span> <a name="line-34"></a> <a name="line-35"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-36"></a> <a name="line-37"></a><a name="FeedbackToken"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>FeedbackToken</span> <span class='hs-keyglyph'>=</span> <a name="line-38"></a> <span class='hs-conid'>PointToken</span> <span class='hs-conid'>VertexInfo</span> <a name="line-39"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>LineToken</span> <span class='hs-conid'>VertexInfo</span> <span class='hs-conid'>VertexInfo</span> <a name="line-40"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>LineResetToken</span> <span class='hs-conid'>VertexInfo</span> <span class='hs-conid'>VertexInfo</span> <a name="line-41"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>PolygonToken</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>VertexInfo</span><span class='hs-keyglyph'>]</span> <a name="line-42"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>BitmapToken</span> <span class='hs-conid'>VertexInfo</span> <a name="line-43"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>DrawPixelToken</span> <span class='hs-conid'>VertexInfo</span> <a name="line-44"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>CopyPixelToken</span> <span class='hs-conid'>VertexInfo</span> <a name="line-45"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>PassThroughToken</span> <span class='hs-conid'>PassThroughValue</span> <a name="line-46"></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-47"></a> <a name="line-48"></a><a name="VertexInfo"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>VertexInfo</span> <span class='hs-keyglyph'>=</span> <a name="line-49"></a> <span class='hs-conid'>Vertex2D</span> <span class='hs-layout'>(</span><span class='hs-conid'>Vertex2</span> <span class='hs-conid'>GLfloat</span><span class='hs-layout'>)</span> <a name="line-50"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Vertex3D</span> <span class='hs-layout'>(</span><span class='hs-conid'>Vertex3</span> <span class='hs-conid'>GLfloat</span><span class='hs-layout'>)</span> <a name="line-51"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Vertex3DColor</span> <span class='hs-layout'>(</span><span class='hs-conid'>Vertex3</span> <span class='hs-conid'>GLfloat</span><span class='hs-layout'>)</span> <span class='hs-conid'>ColorInfo</span> <a name="line-52"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Vertex3DColorTexture</span> <span class='hs-layout'>(</span><span class='hs-conid'>Vertex3</span> <span class='hs-conid'>GLfloat</span><span class='hs-layout'>)</span> <span class='hs-conid'>ColorInfo</span> <span class='hs-layout'>(</span><span class='hs-conid'>TexCoord4</span> <span class='hs-conid'>GLfloat</span><span class='hs-layout'>)</span> <a name="line-53"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Vertex4DColorTexture</span> <span class='hs-layout'>(</span><span class='hs-conid'>Vertex4</span> <span class='hs-conid'>GLfloat</span><span class='hs-layout'>)</span> <span class='hs-conid'>ColorInfo</span> <span class='hs-layout'>(</span><span class='hs-conid'>TexCoord4</span> <span class='hs-conid'>GLfloat</span><span class='hs-layout'>)</span> <a name="line-54"></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-55"></a> <a name="line-56"></a><a name="ColorInfo"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>ColorInfo</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Either</span> <span class='hs-layout'>(</span><span class='hs-conid'>Index1</span> <span class='hs-conid'>GLint</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Color4</span> <span class='hs-conid'>GLfloat</span><span class='hs-layout'>)</span> <a name="line-57"></a> <a name="line-58"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-59"></a> <a name="line-60"></a><a name="FeedbackTag"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>FeedbackTag</span> <span class='hs-keyglyph'>=</span> <a name="line-61"></a> <span class='hs-conid'>PointTag</span> <a name="line-62"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>LineTag</span> <a name="line-63"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>LineResetTag</span> <a name="line-64"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>PolygonTag</span> <a name="line-65"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>BitmapTag</span> <a name="line-66"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>DrawPixelTag</span> <a name="line-67"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>CopyPixelTag</span> <a name="line-68"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>PassThroughTag</span> <a name="line-69"></a> <a name="line-70"></a><a name="unmarshalFeedbackTag"></a><span class='hs-definition'>unmarshalFeedbackTag</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FeedbackTag</span> <a name="line-71"></a><span class='hs-definition'>unmarshalFeedbackTag</span> <span class='hs-varid'>x</span> <a name="line-72"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x701</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PointTag</span> <a name="line-73"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x702</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>LineTag</span> <a name="line-74"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x707</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>LineResetTag</span> <a name="line-75"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x703</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PolygonTag</span> <a name="line-76"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x704</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BitmapTag</span> <a name="line-77"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x705</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>DrawPixelTag</span> <a name="line-78"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x706</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>CopyPixelTag</span> <a name="line-79"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-num'>0x700</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PassThroughTag</span> <a name="line-80"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>error</span> <span class='hs-layout'>(</span><span class='hs-str'>"unmarshalFeedbackTag: illegal value "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <a name="line-81"></a> <a name="line-82"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-83"></a> <a name="line-84"></a><a name="FeedbackType"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>FeedbackType</span> <span class='hs-keyglyph'>=</span> <a name="line-85"></a> <span class='hs-conid'>TwoD</span> <a name="line-86"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ThreeD</span> <a name="line-87"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ThreeDColor</span> <a name="line-88"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ThreeDColorTexture</span> <a name="line-89"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>FourDColorTexture</span> <a name="line-90"></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-91"></a> <a name="line-92"></a><a name="marshalFeedbackType"></a><span class='hs-definition'>marshalFeedbackType</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FeedbackType</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLenum</span> <a name="line-93"></a><span class='hs-definition'>marshalFeedbackType</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>x</span> <span class='hs-keyword'>of</span> <a name="line-94"></a> <span class='hs-conid'>TwoD</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>0x600</span> <a name="line-95"></a> <span class='hs-conid'>ThreeD</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>0x601</span> <a name="line-96"></a> <span class='hs-conid'>ThreeDColor</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>0x602</span> <a name="line-97"></a> <span class='hs-conid'>ThreeDColorTexture</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>0x603</span> <a name="line-98"></a> <span class='hs-conid'>FourDColorTexture</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>0x604</span> <a name="line-99"></a> <a name="line-100"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-101"></a> <a name="line-102"></a><a name="getFeedbackTokens"></a><span class='hs-definition'>getFeedbackTokens</span> <span class='hs-keyglyph'>::</span> <a name="line-103"></a> <span class='hs-conid'>GLsizei</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FeedbackType</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Maybe</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>FeedbackToken</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <a name="line-104"></a><span class='hs-definition'>getFeedbackTokens</span> <span class='hs-varid'>bufSize</span> <span class='hs-varid'>feedbackType</span> <span class='hs-varid'>action</span> <span class='hs-keyglyph'>=</span> <a name="line-105"></a> <span class='hs-varid'>allocaArray</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>bufSize</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>buf</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <a name="line-106"></a> <span class='hs-varid'>glFeedbackBuffer</span> <span class='hs-varid'>bufSize</span> <span class='hs-layout'>(</span><span class='hs-varid'>marshalFeedbackType</span> <span class='hs-varid'>feedbackType</span><span class='hs-layout'>)</span> <span class='hs-varid'>buf</span> <a name="line-107"></a> <span class='hs-layout'>(</span><span class='hs-varid'>value</span><span class='hs-layout'>,</span> <span class='hs-varid'>numValues</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>withRenderMode</span> <span class='hs-conid'>Feedback</span> <span class='hs-varid'>action</span> <a name="line-108"></a> <span class='hs-varid'>tokens</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>parseFeedbackBuffer</span> <span class='hs-varid'>numValues</span> <span class='hs-varid'>buf</span> <span class='hs-varid'>feedbackType</span> <a name="line-109"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>value</span><span class='hs-layout'>,</span> <span class='hs-varid'>tokens</span><span class='hs-layout'>)</span> <a name="line-110"></a> <a name="line-111"></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'>"glFeedbackBuffer"</span> <span class='hs-varid'>glFeedbackBuffer</span> <span class='hs-keyglyph'>::</span> <a name="line-112"></a> <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-conid'>GLfloat</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-113"></a> <a name="line-114"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-115"></a> <a name="line-116"></a><a name="parseFeedbackBuffer"></a><span class='hs-definition'>parseFeedbackBuffer</span> <span class='hs-keyglyph'>::</span> <a name="line-117"></a> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GLfloat</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FeedbackType</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>FeedbackToken</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <a name="line-118"></a><span class='hs-definition'>parseFeedbackBuffer</span> <span class='hs-varid'>numValues</span> <span class='hs-varid'>buf</span> <span class='hs-varid'>feedbackType</span> <a name="line-119"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>numValues</span> <span class='hs-varop'><</span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span> <a name="line-120"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <a name="line-121"></a> <span class='hs-varid'>rgba</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>get</span> <span class='hs-varid'>rgbaMode</span> <a name="line-122"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>end</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>buf</span> <span class='hs-varop'>`plusPtr`</span> <a name="line-123"></a> <span class='hs-layout'>(</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'>GLfloat</span><span class='hs-layout'>)</span> <span class='hs-varop'>*</span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>numValues</span><span class='hs-layout'>)</span> <a name="line-124"></a> <span class='hs-varid'>infoParser</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>calcInfoParser</span> <span class='hs-varid'>feedbackType</span> <span class='hs-layout'>(</span><span class='hs-varid'>calcColorParser</span> <span class='hs-varid'>rgba</span><span class='hs-layout'>)</span> <a name="line-125"></a> <span class='hs-varid'>loop</span> <span class='hs-varid'>tokens</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <a name="line-126"></a> <span class='hs-varid'>ptr</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getIOState</span> <a name="line-127"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>ptr</span> <span class='hs-varop'>==</span> <span class='hs-varid'>end</span> <a name="line-128"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>reverse</span> <span class='hs-varid'>tokens</span><span class='hs-layout'>)</span> <a name="line-129"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>token</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>tokenParser</span> <span class='hs-varid'>infoParser</span> <a name="line-130"></a> <span class='hs-varid'>loop</span> <span class='hs-layout'>(</span><span class='hs-varid'>token</span> <span class='hs-conop'>:</span> <span class='hs-varid'>tokens</span><span class='hs-layout'>)</span> <a name="line-131"></a> <span class='hs-varid'>fmap</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>evalIOState</span> <span class='hs-layout'>(</span><span class='hs-varid'>loop</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span> <span class='hs-varid'>buf</span> <a name="line-132"></a> <a name="line-133"></a><a name="Parser"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Parser</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IOState</span> <span class='hs-conid'>GLfloat</span> <span class='hs-varid'>a</span> <a name="line-134"></a> <a name="line-135"></a><a name="tokenParser"></a><span class='hs-definition'>tokenParser</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>VertexInfo</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>FeedbackToken</span> <a name="line-136"></a><span class='hs-definition'>tokenParser</span> <span class='hs-varid'>infoParser</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <a name="line-137"></a> <span class='hs-varid'>tag</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>parseGLenum</span> <a name="line-138"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>unmarshalFeedbackTag</span> <span class='hs-varid'>tag</span> <span class='hs-keyword'>of</span> <a name="line-139"></a> <span class='hs-conid'>PointTag</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>fmap</span> <span class='hs-conid'>PointToken</span> <span class='hs-varid'>infoParser</span> <a name="line-140"></a> <span class='hs-conid'>LineTag</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>liftM2</span> <span class='hs-conid'>LineToken</span> <span class='hs-varid'>infoParser</span> <span class='hs-varid'>infoParser</span> <a name="line-141"></a> <span class='hs-conid'>LineResetTag</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>liftM2</span> <span class='hs-conid'>LineResetToken</span> <span class='hs-varid'>infoParser</span> <span class='hs-varid'>infoParser</span> <a name="line-142"></a> <span class='hs-conid'>PolygonTag</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>parseGLint</span><span class='hs-layout'>;</span> <span class='hs-varid'>fmap</span> <span class='hs-conid'>PolygonToken</span> <span class='hs-layout'>(</span><span class='hs-varid'>nTimes</span> <span class='hs-varid'>n</span> <span class='hs-varid'>infoParser</span><span class='hs-layout'>)</span> <a name="line-143"></a> <span class='hs-conid'>BitmapTag</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>fmap</span> <span class='hs-conid'>BitmapToken</span> <span class='hs-varid'>infoParser</span> <a name="line-144"></a> <span class='hs-conid'>DrawPixelTag</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>fmap</span> <span class='hs-conid'>DrawPixelToken</span> <span class='hs-varid'>infoParser</span> <a name="line-145"></a> <span class='hs-conid'>CopyPixelTag</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>fmap</span> <span class='hs-conid'>CopyPixelToken</span> <span class='hs-varid'>infoParser</span> <a name="line-146"></a> <span class='hs-conid'>PassThroughTag</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>fmap</span> <span class='hs-conid'>PassThroughToken</span> <span class='hs-varid'>parsePassThroughValue</span> <a name="line-147"></a> <a name="line-148"></a><a name="calcInfoParser"></a><span class='hs-definition'>calcInfoParser</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FeedbackType</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>ColorInfo</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>VertexInfo</span> <a name="line-149"></a><span class='hs-definition'>calcInfoParser</span> <span class='hs-varid'>feedbackType</span> <span class='hs-varid'>colorParser</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>feedbackType</span> <span class='hs-keyword'>of</span> <a name="line-150"></a> <span class='hs-conid'>TwoD</span> <span class='hs-keyglyph'>-></span> <a name="line-151"></a> <span class='hs-varid'>fmap</span> <span class='hs-conid'>Vertex2D</span> <span class='hs-varid'>parseVertex2</span> <a name="line-152"></a> <span class='hs-conid'>ThreeD</span> <span class='hs-keyglyph'>-></span> <a name="line-153"></a> <span class='hs-varid'>fmap</span> <span class='hs-conid'>Vertex3D</span> <span class='hs-varid'>parseVertex3</span> <a name="line-154"></a> <span class='hs-conid'>ThreeDColor</span> <span class='hs-keyglyph'>-></span> <a name="line-155"></a> <span class='hs-varid'>liftM2</span> <span class='hs-conid'>Vertex3DColor</span> <span class='hs-varid'>parseVertex3</span> <span class='hs-varid'>colorParser</span> <a name="line-156"></a> <span class='hs-conid'>ThreeDColorTexture</span> <span class='hs-keyglyph'>-></span> <a name="line-157"></a> <span class='hs-varid'>liftM3</span> <span class='hs-conid'>Vertex3DColorTexture</span> <span class='hs-varid'>parseVertex3</span> <span class='hs-varid'>colorParser</span> <span class='hs-varid'>parseTexCoord4</span> <a name="line-158"></a> <span class='hs-conid'>FourDColorTexture</span> <span class='hs-keyglyph'>-></span> <a name="line-159"></a> <span class='hs-varid'>liftM3</span> <span class='hs-conid'>Vertex4DColorTexture</span> <span class='hs-varid'>parseVertex4</span> <span class='hs-varid'>colorParser</span> <span class='hs-varid'>parseTexCoord4</span> <a name="line-160"></a> <a name="line-161"></a><a name="parseVertex2"></a><span class='hs-definition'>parseVertex2</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Parser</span> <span class='hs-layout'>(</span><span class='hs-conid'>Vertex2</span> <span class='hs-conid'>GLfloat</span><span class='hs-layout'>)</span> <a name="line-162"></a><span class='hs-definition'>parseVertex2</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>liftM2</span> <span class='hs-conid'>Vertex2</span> <span class='hs-varid'>parseGLfloat</span> <span class='hs-varid'>parseGLfloat</span> <a name="line-163"></a> <a name="line-164"></a><a name="parseVertex3"></a><span class='hs-definition'>parseVertex3</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Parser</span> <span class='hs-layout'>(</span><span class='hs-conid'>Vertex3</span> <span class='hs-conid'>GLfloat</span><span class='hs-layout'>)</span> <a name="line-165"></a><span class='hs-definition'>parseVertex3</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>liftM3</span> <span class='hs-conid'>Vertex3</span> <span class='hs-varid'>parseGLfloat</span> <span class='hs-varid'>parseGLfloat</span> <span class='hs-varid'>parseGLfloat</span> <a name="line-166"></a> <a name="line-167"></a><a name="parseVertex4"></a><span class='hs-definition'>parseVertex4</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Parser</span> <span class='hs-layout'>(</span><span class='hs-conid'>Vertex4</span> <span class='hs-conid'>GLfloat</span><span class='hs-layout'>)</span> <a name="line-168"></a><span class='hs-definition'>parseVertex4</span> <span class='hs-keyglyph'>=</span> <a name="line-169"></a> <span class='hs-varid'>liftM4</span> <span class='hs-conid'>Vertex4</span> <span class='hs-varid'>parseGLfloat</span> <span class='hs-varid'>parseGLfloat</span> <span class='hs-varid'>parseGLfloat</span> <span class='hs-varid'>parseGLfloat</span> <a name="line-170"></a> <a name="line-171"></a><a name="calcColorParser"></a><span class='hs-definition'>calcColorParser</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>ColorInfo</span> <a name="line-172"></a><span class='hs-definition'>calcColorParser</span> <span class='hs-conid'>False</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span> <span class='hs-conid'>Left</span> <span class='hs-varid'>parseIndex1</span> <a name="line-173"></a><span class='hs-definition'>calcColorParser</span> <span class='hs-conid'>True</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span> <span class='hs-conid'>Right</span> <span class='hs-varid'>parseColor4</span> <a name="line-174"></a> <a name="line-175"></a><a name="parseIndex1"></a><span class='hs-definition'>parseIndex1</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Parser</span> <span class='hs-layout'>(</span><span class='hs-conid'>Index1</span> <span class='hs-conid'>GLint</span><span class='hs-layout'>)</span> <a name="line-176"></a><span class='hs-definition'>parseIndex1</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span> <span class='hs-conid'>Index1</span> <span class='hs-varid'>parseGLint</span> <a name="line-177"></a> <a name="line-178"></a><a name="parseColor4"></a><span class='hs-definition'>parseColor4</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Parser</span> <span class='hs-layout'>(</span><span class='hs-conid'>Color4</span> <span class='hs-conid'>GLfloat</span><span class='hs-layout'>)</span> <a name="line-179"></a><span class='hs-definition'>parseColor4</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>liftM4</span> <span class='hs-conid'>Color4</span> <span class='hs-varid'>parseGLfloat</span> <span class='hs-varid'>parseGLfloat</span> <span class='hs-varid'>parseGLfloat</span> <span class='hs-varid'>parseGLfloat</span> <a name="line-180"></a> <a name="line-181"></a><a name="parseTexCoord4"></a><span class='hs-definition'>parseTexCoord4</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Parser</span> <span class='hs-layout'>(</span><span class='hs-conid'>TexCoord4</span> <span class='hs-conid'>GLfloat</span><span class='hs-layout'>)</span> <a name="line-182"></a><span class='hs-definition'>parseTexCoord4</span> <span class='hs-keyglyph'>=</span> <a name="line-183"></a> <span class='hs-varid'>liftM4</span> <span class='hs-conid'>TexCoord4</span> <span class='hs-varid'>parseGLfloat</span> <span class='hs-varid'>parseGLfloat</span> <span class='hs-varid'>parseGLfloat</span> <span class='hs-varid'>parseGLfloat</span> <a name="line-184"></a> <a name="line-185"></a><a name="parsePassThroughValue"></a><span class='hs-definition'>parsePassThroughValue</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>PassThroughValue</span> <a name="line-186"></a><span class='hs-definition'>parsePassThroughValue</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span> <span class='hs-conid'>PassThroughValue</span> <span class='hs-varid'>parseGLfloat</span> <a name="line-187"></a> <a name="line-188"></a><a name="parseGLenum"></a><span class='hs-definition'>parseGLenum</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>GLenum</span> <a name="line-189"></a><span class='hs-definition'>parseGLenum</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span> <span class='hs-varid'>round</span> <span class='hs-varid'>parseGLfloat</span> <a name="line-190"></a> <a name="line-191"></a><a name="parseGLint"></a><span class='hs-definition'>parseGLint</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>GLint</span> <a name="line-192"></a><span class='hs-definition'>parseGLint</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span> <span class='hs-varid'>round</span> <span class='hs-varid'>parseGLfloat</span> <a name="line-193"></a> <a name="line-194"></a><a name="parseGLfloat"></a><span class='hs-definition'>parseGLfloat</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>GLfloat</span> <a name="line-195"></a><span class='hs-definition'>parseGLfloat</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>peekIOState</span> <a name="line-196"></a> <a name="line-197"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-198"></a> <a name="line-199"></a><a name="PassThroughValue"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>PassThroughValue</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PassThroughValue</span> <span class='hs-conid'>GLfloat</span> <a name="line-200"></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-201"></a> <a name="line-202"></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'>"glPassThrough"</span> <span class='hs-varid'>passThrough</span> <span class='hs-keyglyph'>::</span> <a name="line-203"></a> <span class='hs-conid'>PassThroughValue</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> </pre></body> </html>
