<?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/Selection.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.Selection</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 5.2 (Selection) 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'>Selection</span> <span class='hs-layout'>(</span> <a name="line-16"></a> <span class='hs-conid'>HitRecord</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'>getHitRecords</span><span class='hs-layout'>,</span> <a name="line-17"></a> <span class='hs-conid'>Name</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'>withName</span><span class='hs-layout'>,</span> <span class='hs-varid'>loadName</span><span class='hs-layout'>,</span> <span class='hs-varid'>maxNameStackDepth</span><span class='hs-layout'>,</span> <span class='hs-varid'>nameStackDepth</span><span class='hs-layout'>,</span> <a name="line-18"></a> <span class='hs-conid'>RenderMode</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'>renderMode</span> <a name="line-19"></a><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <a name="line-20"></a> <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> <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'>BasicTypes</span> <span class='hs-layout'>(</span> <a name="line-24"></a> <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'>GLuint</span><span class='hs-layout'>,</span> <span class='hs-conid'>GLfloat</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'>Exception</span> <span class='hs-layout'>(</span> <span class='hs-varid'>bracket_</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'>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'>QueryUtils</span> <span class='hs-layout'>(</span> <a name="line-29"></a> <span class='hs-conid'>GetPName</span><span class='hs-layout'>(</span><span class='hs-conid'>GetMaxNameStackDepth</span><span class='hs-layout'>,</span><span class='hs-conid'>GetNameStackDepth</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>getSizei1</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'>RenderMode</span> <span class='hs-layout'>(</span> <a name="line-31"></a> <span class='hs-conid'>RenderMode</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'>withRenderMode</span><span class='hs-layout'>,</span> <span class='hs-varid'>renderMode</span> <span class='hs-layout'>)</span> <a name="line-32"></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> <a name="line-33"></a> <span class='hs-conid'>GettableStateVar</span><span class='hs-layout'>,</span> <span class='hs-varid'>makeGettableStateVar</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="HitRecord"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>HitRecord</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>HitRecord</span> <span class='hs-conid'>GLfloat</span> <span class='hs-conid'>GLfloat</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Name</span><span class='hs-keyglyph'>]</span> <a name="line-38"></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-39"></a> <a name="line-40"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-41"></a> <a name="line-42"></a><a name="getHitRecords"></a><span class='hs-definition'>getHitRecords</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GLsizei</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'>HitRecord</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <a name="line-43"></a><span class='hs-definition'>getHitRecords</span> <span class='hs-varid'>bufSize</span> <span class='hs-varid'>action</span> <span class='hs-keyglyph'>=</span> <a name="line-44"></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'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>buf</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <a name="line-45"></a> <span class='hs-varid'>glSelectBuffer</span> <span class='hs-varid'>bufSize</span> <span class='hs-varid'>buf</span> <a name="line-46"></a> <span class='hs-layout'>(</span><span class='hs-varid'>value</span><span class='hs-layout'>,</span> <span class='hs-varid'>numHits</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>withRenderMode</span> <span class='hs-conid'>Select</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span> <a name="line-47"></a> <span class='hs-varid'>glInitNames</span> <a name="line-48"></a> <span class='hs-varid'>action</span> <a name="line-49"></a> <span class='hs-varid'>hits</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>parseSelectionBuffer</span> <span class='hs-varid'>numHits</span> <span class='hs-varid'>buf</span> <a name="line-50"></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'>hits</span><span class='hs-layout'>)</span> <a name="line-51"></a> <a name="line-52"></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'>"glInitNames"</span> <span class='hs-varid'>glInitNames</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-53"></a> <a name="line-54"></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'>"glSelectBuffer"</span> <span class='hs-varid'>glSelectBuffer</span> <span class='hs-keyglyph'>::</span> <a name="line-55"></a> <span class='hs-conid'>GLsizei</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GLuint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</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="parseSelectionBuffer"></a><span class='hs-definition'>parseSelectionBuffer</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GLint</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ptr</span> <span class='hs-conid'>GLuint</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'>HitRecord</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <a name="line-60"></a><span class='hs-definition'>parseSelectionBuffer</span> <span class='hs-varid'>numHits</span> <span class='hs-varid'>buf</span> <a name="line-61"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>numHits</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-62"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>evalIOState</span> <span class='hs-layout'>(</span><span class='hs-varid'>nTimes</span> <span class='hs-varid'>numHits</span> <span class='hs-varid'>parseSelectionHit</span><span class='hs-layout'>)</span> <span class='hs-varid'>buf</span> <a name="line-63"></a> <a name="line-64"></a><a name="Parser"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Parser</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IOState</span> <span class='hs-conid'>GLuint</span> <span class='hs-varid'>a</span> <a name="line-65"></a> <a name="line-66"></a><a name="parseSelectionHit"></a><span class='hs-definition'>parseSelectionHit</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>HitRecord</span> <a name="line-67"></a><span class='hs-definition'>parseSelectionHit</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <a name="line-68"></a> <span class='hs-varid'>numNames</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>parseGLuint</span> <a name="line-69"></a> <span class='hs-varid'>minZ</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>parseGLfloat</span> <a name="line-70"></a> <span class='hs-varid'>maxZ</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>parseGLfloat</span> <a name="line-71"></a> <span class='hs-varid'>nameStack</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>nTimes</span> <span class='hs-varid'>numNames</span> <span class='hs-varid'>parseName</span> <a name="line-72"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>HitRecord</span> <span class='hs-varid'>minZ</span> <span class='hs-varid'>maxZ</span> <span class='hs-varid'>nameStack</span> <a name="line-73"></a> <a name="line-74"></a><a name="parseGLuint"></a><span class='hs-definition'>parseGLuint</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>GLuint</span> <a name="line-75"></a><span class='hs-definition'>parseGLuint</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>peekIOState</span> <a name="line-76"></a> <a name="line-77"></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-78"></a><span class='hs-definition'>parseGLfloat</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>x</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>x</span> <span class='hs-varop'>/</span> <span class='hs-num'>0xffffffff</span><span class='hs-layout'>)</span> <span class='hs-varid'>parseGLuint</span> <a name="line-79"></a> <a name="line-80"></a><a name="parseName"></a><span class='hs-definition'>parseName</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Parser</span> <span class='hs-conid'>Name</span> <a name="line-81"></a><span class='hs-definition'>parseName</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span> <span class='hs-conid'>Name</span> <span class='hs-varid'>parseGLuint</span> <a name="line-82"></a> <a name="line-83"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-84"></a> <a name="line-85"></a><a name="Name"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>Name</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Name</span> <span class='hs-conid'>GLuint</span> <a name="line-86"></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-87"></a> <a name="line-88"></a><a name="withName"></a><span class='hs-definition'>withName</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Name</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-varid'>a</span> <a name="line-89"></a><span class='hs-definition'>withName</span> <span class='hs-varid'>name</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>bracket_</span> <span class='hs-layout'>(</span><span class='hs-varid'>glPushName</span> <span class='hs-varid'>name</span><span class='hs-layout'>)</span> <span class='hs-varid'>glPopName</span> <a name="line-90"></a> <a name="line-91"></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'>"glPopName"</span> <span class='hs-varid'>glPopName</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-92"></a> <a name="line-93"></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'>"glPushName"</span> <span class='hs-varid'>glPushName</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Name</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-94"></a> <a name="line-95"></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'>"glLoadName"</span> <span class='hs-varid'>loadName</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Name</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <a name="line-96"></a> <a name="line-97"></a><a name="maxNameStackDepth"></a><span class='hs-definition'>maxNameStackDepth</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GettableStateVar</span> <span class='hs-conid'>GLsizei</span> <a name="line-98"></a><span class='hs-definition'>maxNameStackDepth</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>makeGettableStateVar</span> <span class='hs-layout'>(</span><span class='hs-varid'>getSizei1</span> <span class='hs-varid'>id</span> <span class='hs-conid'>GetMaxNameStackDepth</span><span class='hs-layout'>)</span> <a name="line-99"></a> <a name="line-100"></a><a name="nameStackDepth"></a><span class='hs-definition'>nameStackDepth</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GettableStateVar</span> <span class='hs-conid'>GLsizei</span> <a name="line-101"></a><span class='hs-definition'>nameStackDepth</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>makeGettableStateVar</span> <span class='hs-layout'>(</span><span class='hs-varid'>getSizei1</span> <span class='hs-varid'>id</span> <span class='hs-conid'>GetNameStackDepth</span><span class='hs-layout'>)</span> </pre></body> </html>
