<?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/StringQueries.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.StringQueries</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 parts of section 6.1.11 (Pointer and String</span> <a name="line-12"></a><span class='hs-comment'>-- Queries) of the OpenGL 2.1 specs.</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'>StringQueries</span> <span class='hs-layout'>(</span> <a name="line-17"></a> <span class='hs-varid'>vendor</span><span class='hs-layout'>,</span> <span class='hs-varid'>renderer</span><span class='hs-layout'>,</span> <span class='hs-varid'>glVersion</span><span class='hs-layout'>,</span> <span class='hs-varid'>glExtensions</span><span class='hs-layout'>,</span> <span class='hs-varid'>shadingLanguageVersion</span><span class='hs-layout'>,</span> <span class='hs-varid'>majorMinor</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'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Char</span> <span class='hs-layout'>(</span> <span class='hs-varid'>isDigit</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'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>String</span> <span class='hs-layout'>(</span> <span class='hs-varid'>peekCString</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'>castPtr</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> <span class='hs-conid'>GLenum</span><span class='hs-layout'>,</span> <span class='hs-conid'>GLubyte</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'>QueryUtils</span> <span class='hs-layout'>(</span> <span class='hs-varid'>maybeNullPtr</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'>StateVar</span> <span class='hs-layout'>(</span> <a name="line-26"></a> <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> <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-27"></a> <a name="line-28"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-29"></a> <a name="line-30"></a><a name="vendor"></a><span class='hs-definition'>vendor</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GettableStateVar</span> <span class='hs-conid'>String</span> <a name="line-31"></a><span class='hs-definition'>vendor</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>makeGettableStateVar</span> <span class='hs-layout'>(</span><span class='hs-varid'>getString</span> <span class='hs-conid'>Vendor</span><span class='hs-layout'>)</span> <a name="line-32"></a> <a name="line-33"></a><a name="renderer"></a><span class='hs-definition'>renderer</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GettableStateVar</span> <span class='hs-conid'>String</span> <a name="line-34"></a><span class='hs-definition'>renderer</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>makeGettableStateVar</span> <span class='hs-layout'>(</span><span class='hs-varid'>getString</span> <span class='hs-conid'>Renderer</span><span class='hs-layout'>)</span> <a name="line-35"></a> <a name="line-36"></a><a name="glVersion"></a><span class='hs-definition'>glVersion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GettableStateVar</span> <span class='hs-conid'>String</span> <a name="line-37"></a><span class='hs-definition'>glVersion</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>makeGettableStateVar</span> <span class='hs-layout'>(</span><span class='hs-varid'>getString</span> <span class='hs-conid'>Version</span><span class='hs-layout'>)</span> <a name="line-38"></a> <a name="line-39"></a><a name="glExtensions"></a><span class='hs-definition'>glExtensions</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GettableStateVar</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span> <a name="line-40"></a><span class='hs-definition'>glExtensions</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>makeGettableStateVar</span> <span class='hs-layout'>(</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>words</span> <span class='hs-varop'>$</span> <span class='hs-varid'>getString</span> <span class='hs-conid'>Extensions</span><span class='hs-layout'>)</span> <a name="line-41"></a> <a name="line-42"></a><a name="shadingLanguageVersion"></a><span class='hs-definition'>shadingLanguageVersion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GettableStateVar</span> <span class='hs-conid'>String</span> <a name="line-43"></a><span class='hs-definition'>shadingLanguageVersion</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>makeGettableStateVar</span> <span class='hs-layout'>(</span><span class='hs-varid'>getString</span> <span class='hs-conid'>ShadingLanguageVersion</span><span class='hs-layout'>)</span> <a name="line-44"></a> <a name="line-45"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-46"></a> <a name="line-47"></a><a name="StringName"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>StringName</span> <span class='hs-keyglyph'>=</span> <a name="line-48"></a> <span class='hs-conid'>Vendor</span> <a name="line-49"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Renderer</span> <a name="line-50"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Version</span> <a name="line-51"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Extensions</span> <a name="line-52"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ShadingLanguageVersion</span> <a name="line-53"></a> <a name="line-54"></a><a name="marshalStringName"></a><span class='hs-definition'>marshalStringName</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>StringName</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GLenum</span> <a name="line-55"></a><span class='hs-definition'>marshalStringName</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-56"></a> <span class='hs-conid'>Vendor</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>0x1f00</span> <a name="line-57"></a> <span class='hs-conid'>Renderer</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>0x1f01</span> <a name="line-58"></a> <span class='hs-conid'>Version</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>0x1f02</span> <a name="line-59"></a> <span class='hs-conid'>Extensions</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>0x1f03</span> <a name="line-60"></a> <span class='hs-conid'>ShadingLanguageVersion</span> <span class='hs-keyglyph'>-></span> <span class='hs-num'>0x8b8c</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="getString"></a><span class='hs-definition'>getString</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>StringName</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>String</span> <a name="line-65"></a><span class='hs-definition'>getString</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>glGetString</span> <span class='hs-layout'>(</span><span class='hs-varid'>marshalStringName</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-varop'>>>=</span> <a name="line-66"></a> <span class='hs-varid'>maybeNullPtr</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-str'>""</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>peekCString</span> <span class='hs-varop'>.</span> <span class='hs-varid'>castPtr</span><span class='hs-layout'>)</span> <a name="line-67"></a> <a name="line-68"></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'>"glGetString"</span> <span class='hs-varid'>glGetString</span> <span class='hs-keyglyph'>::</span> <a name="line-69"></a> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ptr</span> <span class='hs-conid'>GLubyte</span><span class='hs-layout'>)</span> <a name="line-70"></a> <a name="line-71"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span> <a name="line-72"></a> <a name="line-73"></a><span class='hs-comment'>-- | A utility function to be used with e.g. 'glVersion' or</span> <a name="line-74"></a><span class='hs-comment'>-- 'shadingLanguageVersion', transforming a variable containing a string of the</span> <a name="line-75"></a><span class='hs-comment'>-- form /major.minor[optional rest]/ into a variable containing a numeric</span> <a name="line-76"></a><span class='hs-comment'>-- major\/minor version. If the string is malformed, which should never happen</span> <a name="line-77"></a><span class='hs-comment'>-- with a sane OpenGL implementation, it is transformed to @(-1,-1)@.</span> <a name="line-78"></a> <a name="line-79"></a><a name="majorMinor"></a><span class='hs-definition'>majorMinor</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GettableStateVar</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GettableStateVar</span> <span class='hs-layout'>(</span><span class='hs-conid'>Int</span><span class='hs-layout'>,</span> <span class='hs-conid'>Int</span><span class='hs-layout'>)</span> <a name="line-80"></a><span class='hs-definition'>majorMinor</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>makeGettableStateVar</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fmap</span> <span class='hs-varid'>parse</span> <span class='hs-varop'>.</span> <span class='hs-varid'>get</span> <a name="line-81"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>defaultVersion</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>,</span> <span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <a name="line-82"></a> <span class='hs-varid'>parse</span> <span class='hs-varid'>str</span> <span class='hs-keyglyph'>=</span> <a name="line-83"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>span</span> <span class='hs-varid'>isDigit</span> <span class='hs-varid'>str</span> <span class='hs-keyword'>of</span> <a name="line-84"></a> <span class='hs-layout'>(</span><span class='hs-varid'>major</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-chr'>'.'</span><span class='hs-conop'>:</span><span class='hs-varid'>rest</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <a name="line-85"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>span</span> <span class='hs-varid'>isDigit</span> <span class='hs-varid'>rest</span> <span class='hs-keyword'>of</span> <a name="line-86"></a> <span class='hs-layout'>(</span><span class='hs-varid'>minor</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>read</span> <span class='hs-varid'>major</span><span class='hs-layout'>,</span> <span class='hs-varid'>read</span> <span class='hs-varid'>minor</span><span class='hs-layout'>)</span> <a name="line-87"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>defaultVersion</span> <a name="line-88"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>defaultVersion</span> </pre></body> </html>
