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<title>Graphics/Rendering/OpenGL/GLU/ErrorsInternal.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# OPTIONS_GHC -fno-cse #-}</span>
<a name="line-2"></a>
<a name="line-3"></a><span class='hs-comment'>-- #hide</span>
<a name="line-4"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-5"></a><span class='hs-comment'>-- |</span>
<a name="line-6"></a><span class='hs-comment'>-- Module : Graphics.Rendering.OpenGL.GLU.ErrorsInternal</span>
<a name="line-7"></a><span class='hs-comment'>-- Copyright : (c) Sven Panne 2002-2009</span>
<a name="line-8"></a><span class='hs-comment'>-- License : BSD-style (see the file libraries/OpenGL/LICENSE)</span>
<a name="line-9"></a><span class='hs-comment'>--</span>
<a name="line-10"></a><span class='hs-comment'>-- Maintainer : sven.panne@aedion.de</span>
<a name="line-11"></a><span class='hs-comment'>-- Stability : stable</span>
<a name="line-12"></a><span class='hs-comment'>-- Portability : portable</span>
<a name="line-13"></a><span class='hs-comment'>--</span>
<a name="line-14"></a><span class='hs-comment'>-- This is a purely internal module corresponding to some parts of section 2.5</span>
<a name="line-15"></a><span class='hs-comment'>-- (GL Errors) of the OpenGL 2.1 specs and chapter 8 (Errors) of the GLU specs.</span>
<a name="line-16"></a><span class='hs-comment'>--</span>
<a name="line-17"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-18"></a>
<a name="line-19"></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'>ErrorsInternal</span> <span class='hs-layout'>(</span>
<a name="line-20"></a> <span class='hs-conid'>Error</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'>ErrorCategory</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'>getErrors</span><span class='hs-layout'>,</span>
<a name="line-21"></a> <span class='hs-varid'>recordErrorCode</span><span class='hs-layout'>,</span> <span class='hs-varid'>recordInvalidEnum</span><span class='hs-layout'>,</span> <span class='hs-varid'>recordInvalidValue</span><span class='hs-layout'>,</span> <span class='hs-varid'>recordOutOfMemory</span>
<a name="line-22"></a><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-23"></a>
<a name="line-24"></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-varid'>castPtr</span> <span class='hs-layout'>)</span>
<a name="line-25"></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-26"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>IORef</span> <span class='hs-layout'>(</span> <span class='hs-conid'>IORef</span><span class='hs-layout'>,</span> <span class='hs-varid'>newIORef</span><span class='hs-layout'>,</span> <span class='hs-varid'>readIORef</span><span class='hs-layout'>,</span> <span class='hs-varid'>writeIORef</span> <span class='hs-layout'>)</span>
<a name="line-27"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Unsafe</span> <span class='hs-layout'>(</span> <span class='hs-varid'>unsafePerformIO</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'>GLU</span><span class='hs-varop'>.</span><span class='hs-conid'>Raw</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'>Raw</span><span class='hs-varop'>.</span><span class='hs-conid'>ARB</span><span class='hs-varop'>.</span><span class='hs-conid'>Compatibility</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'>Raw</span><span class='hs-varop'>.</span><span class='hs-conid'>Core31</span>
<a name="line-31"></a>
<a name="line-32"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-33"></a>
<a name="line-34"></a><span class='hs-comment'>-- | GL\/GLU errors consist of a general error category and a description of</span>
<a name="line-35"></a><span class='hs-comment'>-- what went wrong.</span>
<a name="line-36"></a>
<a name="line-37"></a><a name="Error"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Error</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Error</span> <span class='hs-conid'>ErrorCategory</span> <span class='hs-conid'>String</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><span class='hs-comment'>-- | General GL\/GLU error categories</span>
<a name="line-43"></a>
<a name="line-44"></a><a name="ErrorCategory"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>ErrorCategory</span>
<a name="line-45"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>InvalidEnum</span>
<a name="line-46"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>InvalidValue</span>
<a name="line-47"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>InvalidOperation</span>
<a name="line-48"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>InvalidFramebufferOperation</span>
<a name="line-49"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>OutOfMemory</span>
<a name="line-50"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>StackOverflow</span>
<a name="line-51"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>StackUnderflow</span>
<a name="line-52"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>TableTooLarge</span>
<a name="line-53"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>TesselatorError</span>
<a name="line-54"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>NURBSError</span>
<a name="line-55"></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-56"></a>
<a name="line-57"></a><a name="unmarshalErrorCategory"></a><span class='hs-definition'>unmarshalErrorCategory</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ErrorCategory</span>
<a name="line-58"></a><span class='hs-definition'>unmarshalErrorCategory</span> <span class='hs-varid'>c</span>
<a name="line-59"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isInvalidEnum</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>InvalidEnum</span>
<a name="line-60"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isInvalidValue</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>InvalidValue</span>
<a name="line-61"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isInvalidOperation</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>InvalidOperation</span>
<a name="line-62"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isInvalidFramebufferOperation</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>InvalidFramebufferOperation</span>
<a name="line-63"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isOutOfMemory</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>OutOfMemory</span>
<a name="line-64"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isStackOverflow</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>StackOverflow</span>
<a name="line-65"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isStackUnderflow</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>StackUnderflow</span>
<a name="line-66"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isTableTooLarge</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TableTooLarge</span>
<a name="line-67"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isTesselatorError</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TesselatorError</span>
<a name="line-68"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isNURBSError</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NURBSError</span>
<a name="line-69"></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-str'>"unmarshalErrorCategory"</span>
<a name="line-70"></a>
<a name="line-71"></a><a name="isInvalidEnum"></a><span class='hs-definition'>isInvalidEnum</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-72"></a><span class='hs-definition'>isInvalidEnum</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>c</span> <span class='hs-varop'>==</span> <span class='hs-varid'>gl_INVALID_ENUM</span> <span class='hs-varop'>||</span> <span class='hs-varid'>c</span> <span class='hs-varop'>==</span> <span class='hs-varid'>glu_INVALID_ENUM</span>
<a name="line-73"></a>
<a name="line-74"></a><a name="isInvalidValue"></a><span class='hs-definition'>isInvalidValue</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-75"></a><span class='hs-definition'>isInvalidValue</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>c</span> <span class='hs-varop'>==</span> <span class='hs-varid'>gl_INVALID_VALUE</span> <span class='hs-varop'>||</span> <span class='hs-varid'>c</span> <span class='hs-varop'>==</span> <span class='hs-varid'>glu_INVALID_VALUE</span>
<a name="line-76"></a>
<a name="line-77"></a><a name="isInvalidOperation"></a><span class='hs-definition'>isInvalidOperation</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-78"></a><span class='hs-definition'>isInvalidOperation</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>c</span> <span class='hs-varop'>==</span> <span class='hs-varid'>gl_INVALID_OPERATION</span> <span class='hs-varop'>||</span> <span class='hs-varid'>c</span> <span class='hs-varop'>==</span> <span class='hs-varid'>glu_INVALID_OPERATION</span>
<a name="line-79"></a>
<a name="line-80"></a><a name="isInvalidFramebufferOperation"></a><span class='hs-definition'>isInvalidFramebufferOperation</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-81"></a><span class='hs-definition'>isInvalidFramebufferOperation</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>c</span> <span class='hs-varop'>==</span> <span class='hs-varid'>gl_INVALID_FRAMEBUFFER_OPERATION</span>
<a name="line-82"></a>
<a name="line-83"></a><a name="isOutOfMemory"></a><span class='hs-definition'>isOutOfMemory</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-84"></a><span class='hs-definition'>isOutOfMemory</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>c</span> <span class='hs-varop'>==</span> <span class='hs-varid'>gl_OUT_OF_MEMORY</span> <span class='hs-varop'>||</span> <span class='hs-varid'>c</span> <span class='hs-varop'>==</span> <span class='hs-varid'>glu_OUT_OF_MEMORY</span>
<a name="line-85"></a>
<a name="line-86"></a><a name="isStackOverflow"></a><span class='hs-definition'>isStackOverflow</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-87"></a><span class='hs-definition'>isStackOverflow</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>c</span> <span class='hs-varop'>==</span> <span class='hs-varid'>gl_STACK_OVERFLOW</span>
<a name="line-88"></a>
<a name="line-89"></a><a name="isStackUnderflow"></a><span class='hs-definition'>isStackUnderflow</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-90"></a><span class='hs-definition'>isStackUnderflow</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>c</span> <span class='hs-varop'>==</span> <span class='hs-varid'>gl_STACK_UNDERFLOW</span>
<a name="line-91"></a>
<a name="line-92"></a><a name="isTableTooLarge"></a><span class='hs-definition'>isTableTooLarge</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-93"></a><span class='hs-definition'>isTableTooLarge</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>c</span> <span class='hs-varop'>==</span> <span class='hs-varid'>gl_TABLE_TOO_LARGE</span>
<a name="line-94"></a>
<a name="line-95"></a><a name="isTesselatorError"></a><span class='hs-definition'>isTesselatorError</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-96"></a><span class='hs-definition'>isTesselatorError</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>glu_TESS_ERROR1</span> <span class='hs-varop'><=</span> <span class='hs-varid'>c</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>c</span> <span class='hs-varop'><=</span> <span class='hs-varid'>glu_TESS_ERROR8</span>
<a name="line-97"></a>
<a name="line-98"></a><a name="isNURBSError"></a><span class='hs-definition'>isNURBSError</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-99"></a><span class='hs-definition'>isNURBSError</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>glu_NURBS_ERROR1</span> <span class='hs-varop'><=</span> <span class='hs-varid'>c</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>c</span> <span class='hs-varop'><=</span> <span class='hs-varid'>glu_NURBS_ERROR37</span>
<a name="line-100"></a>
<a name="line-101"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-102"></a>
<a name="line-103"></a><span class='hs-comment'>-- The returned error string is statically allocated, so peekCString</span>
<a name="line-104"></a><span class='hs-comment'>-- does the right thing here. No malloc/free necessary here.</span>
<a name="line-105"></a>
<a name="line-106"></a><a name="makeError"></a><span class='hs-definition'>makeError</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Error</span>
<a name="line-107"></a><span class='hs-definition'>makeError</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-108"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>category</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unmarshalErrorCategory</span> <span class='hs-varid'>e</span>
<a name="line-109"></a> <span class='hs-varid'>ptr</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>gluErrorString</span> <span class='hs-varid'>e</span>
<a name="line-110"></a> <span class='hs-varid'>description</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>peekCString</span> <span class='hs-layout'>(</span><span class='hs-varid'>castPtr</span> <span class='hs-varid'>ptr</span><span class='hs-layout'>)</span>
<a name="line-111"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Error</span> <span class='hs-varid'>category</span> <span class='hs-varid'>description</span>
<a name="line-112"></a>
<a name="line-113"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-114"></a>
<a name="line-115"></a><span class='hs-comment'>-- This seems to be a common Haskell hack nowadays: A plain old global variable</span>
<a name="line-116"></a><span class='hs-comment'>-- with an associated getter and mutator. Perhaps some language/library support</span>
<a name="line-117"></a><span class='hs-comment'>-- is needed?</span>
<a name="line-118"></a>
<a name="line-119"></a><a name="theRecordedErrors"></a><span class='hs-comment'>{-# NOINLINE theRecordedErrors #-}</span>
<a name="line-120"></a><span class='hs-definition'>theRecordedErrors</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IORef</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>GLenum</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span><span class='hs-conid'>Bool</span><span class='hs-layout'>)</span>
<a name="line-121"></a><span class='hs-definition'>theRecordedErrors</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unsafePerformIO</span> <span class='hs-layout'>(</span><span class='hs-varid'>newIORef</span> <span class='hs-layout'>(</span><span class='hs-conid'>[]</span><span class='hs-layout'>,</span> <span class='hs-conid'>True</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-122"></a>
<a name="line-123"></a><a name="getRecordedErrors"></a><span class='hs-definition'>getRecordedErrors</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>GLenum</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span><span class='hs-conid'>Bool</span><span class='hs-layout'>)</span>
<a name="line-124"></a><span class='hs-definition'>getRecordedErrors</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>readIORef</span> <span class='hs-varid'>theRecordedErrors</span>
<a name="line-125"></a>
<a name="line-126"></a><a name="setRecordedErrors"></a><span class='hs-definition'>setRecordedErrors</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>GLenum</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span><span class='hs-conid'>Bool</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-127"></a><span class='hs-definition'>setRecordedErrors</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>writeIORef</span> <span class='hs-varid'>theRecordedErrors</span>
<a name="line-128"></a>
<a name="line-129"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-130"></a>
<a name="line-131"></a><a name="getGLErrors"></a><span class='hs-definition'>getGLErrors</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>GLenum</span><span class='hs-keyglyph'>]</span>
<a name="line-132"></a><span class='hs-definition'>getGLErrors</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>getGLErrorsAux</span> <span class='hs-conid'>[]</span>
<a name="line-133"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>getGLErrorsAux</span> <span class='hs-varid'>acc</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-134"></a> <span class='hs-varid'>errorCode</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>glGetError</span>
<a name="line-135"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>isError</span> <span class='hs-varid'>errorCode</span>
<a name="line-136"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>getGLErrorsAux</span> <span class='hs-layout'>(</span><span class='hs-varid'>errorCode</span> <span class='hs-conop'>:</span> <span class='hs-varid'>acc</span><span class='hs-layout'>)</span>
<a name="line-137"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>reverse</span> <span class='hs-varid'>acc</span>
<a name="line-138"></a>
<a name="line-139"></a><a name="isError"></a><span class='hs-definition'>isError</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-140"></a><span class='hs-definition'>isError</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varop'>/=</span> <span class='hs-varid'>gl_NO_ERROR</span><span class='hs-layout'>)</span>
<a name="line-141"></a>
<a name="line-142"></a><span class='hs-comment'>--------------------------------------------------------------------------------</span>
<a name="line-143"></a>
<a name="line-144"></a><a name="getErrors"></a><span class='hs-definition'>getErrors</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Error</span><span class='hs-keyglyph'>]</span>
<a name="line-145"></a><span class='hs-definition'>getErrors</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-146"></a> <span class='hs-varid'>es</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getErrorCodesAux</span> <span class='hs-layout'>(</span><span class='hs-varid'>const</span> <span class='hs-layout'>(</span><span class='hs-conid'>[]</span><span class='hs-layout'>,</span> <span class='hs-conid'>True</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-147"></a> <span class='hs-varid'>mapM</span> <span class='hs-varid'>makeError</span> <span class='hs-varid'>es</span>
<a name="line-148"></a>
<a name="line-149"></a><a name="recordErrorCode"></a><span class='hs-definition'>recordErrorCode</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GLenum</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-150"></a><span class='hs-definition'>recordErrorCode</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-151"></a> <span class='hs-comment'>-- We don't need the return value because this calls setRecordedErrors</span>
<a name="line-152"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getErrorCodesAux</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>es</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-keyword'>if</span> <span class='hs-varid'>null</span> <span class='hs-varid'>es</span> <span class='hs-keyword'>then</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>e</span><span class='hs-keyglyph'>]</span> <span class='hs-keyword'>else</span> <span class='hs-conid'>[]</span><span class='hs-layout'>,</span> <span class='hs-conid'>False</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-153"></a> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-154"></a>
<a name="line-155"></a><a name="recordInvalidEnum"></a><span class='hs-definition'>recordInvalidEnum</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-156"></a><span class='hs-definition'>recordInvalidEnum</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>recordErrorCode</span> <span class='hs-varid'>gl_INVALID_ENUM</span>
<a name="line-157"></a>
<a name="line-158"></a><a name="recordInvalidValue"></a><span class='hs-definition'>recordInvalidValue</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-159"></a><span class='hs-definition'>recordInvalidValue</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>recordErrorCode</span> <span class='hs-varid'>gl_INVALID_VALUE</span>
<a name="line-160"></a>
<a name="line-161"></a><a name="recordOutOfMemory"></a><span class='hs-definition'>recordOutOfMemory</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-162"></a><span class='hs-definition'>recordOutOfMemory</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>recordErrorCode</span> <span class='hs-varid'>gl_OUT_OF_MEMORY</span>
<a name="line-163"></a>
<a name="line-164"></a><a name="getErrorCodesAux"></a><span class='hs-comment'>-- ToDo: Make this thread-safe</span>
<a name="line-165"></a><span class='hs-definition'>getErrorCodesAux</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>GLenum</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>GLenum</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span><span class='hs-conid'>Bool</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>GLenum</span><span class='hs-keyglyph'>]</span>
<a name="line-166"></a><span class='hs-definition'>getErrorCodesAux</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-167"></a> <span class='hs-layout'>(</span><span class='hs-varid'>recordedErrors</span><span class='hs-layout'>,</span> <span class='hs-varid'>useGLErrors</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getRecordedErrors</span>
<a name="line-168"></a> <span class='hs-varid'>glErrors</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getGLErrors</span>
<a name="line-169"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>es</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>useGLErrors</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>recordedErrors</span> <span class='hs-varop'>++</span> <span class='hs-varid'>glErrors</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>recordedErrors</span>
<a name="line-170"></a> <span class='hs-varid'>setRecordedErrors</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>es</span><span class='hs-layout'>)</span>
<a name="line-171"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>es</span>
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