upstream-man-pages/man4/xhtml/glGet.xml

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   4 <?xml-stylesheet type="text/xsl" href="mathml.xsl"?><html xmlns="http://www.w3.org/1999/xhtml" xmlns:pref="http://www.w3.org/2002/Math/preference" pref:renderer="mathplayer-dl"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><link rel="stylesheet" type="text/css" href="opengl-man.css" /><title>glGet - OpenGL 4 Reference Pages</title><meta name="generator" content="DocBook XSL Stylesheets V1.69.1" /></head><body><div class="refentry" lang="en" xml:lang="en"><a id="glGet"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glGet — return the value or values of a selected parameter</p></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"><tr><td><code class="funcdef">void <b class="fsfunc">glGetBooleanv</b>(</code></td><td>GLenum  </td><td><var class="pdparam">pname</var>, </td></tr><tr><td> </td><td>GLboolean *  </td><td><var class="pdparam">params</var><code>)</code>;</td></tr></table></div></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"><tr><td><code class="funcdef">void <b class="fsfunc">glGetDoublev</b>(</code></td><td>GLenum  </td><td><var class="pdparam">pname</var>, </td></tr><tr><td> </td><td>GLdouble *  </td><td><var class="pdparam">params</var><code>)</code>;</td></tr></table></div></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"><tr><td><code class="funcdef">void <b class="fsfunc">glGetFloatv</b>(</code></td><td>GLenum  </td><td><var class="pdparam">pname</var>, </td></tr><tr><td> </td><td>GLfloat *  </td><td><var class="pdparam">params</var><code>)</code>;</td></tr></table></div></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"><tr><td><code class="funcdef">void <b class="fsfunc">glGetIntegerv</b>(</code></td><td>GLenum  </td><td><var class="pdparam">pname</var>, </td></tr><tr><td> </td><td>GLint *  </td><td><var class="pdparam">params</var><code>)</code>;</td></tr></table></div></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"><tr><td><code class="funcdef">void <b class="fsfunc">glGetInteger64v</b>(</code></td><td>GLenum  </td><td><var class="pdparam">pname</var>, </td></tr><tr><td> </td><td>GLint64 *  </td><td><var class="pdparam">params</var><code>)</code>;</td></tr></table></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="parameters"></a><h2>Parameters</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>pname</code></em></span></dt><dd><p>
   5                     Specifies the parameter value to be returned.
   6                     The symbolic constants in the list below are accepted.
   7                 </p></dd><dt><span class="term"><em class="parameter"><code>params</code></em></span></dt><dd><p>
   8                     Returns the value or values of the specified parameter.
   9                 </p></dd></dl></div></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"><tr><td><code class="funcdef">void <b class="fsfunc">glGetBooleani_v</b>(</code></td><td>GLenum  </td><td><var class="pdparam">pname</var>, </td></tr><tr><td> </td><td>GLuint  </td><td><var class="pdparam">index</var>, </td></tr><tr><td> </td><td>GLboolean *  </td><td><var class="pdparam">data</var><code>)</code>;</td></tr></table></div></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"><tr><td><code class="funcdef">void <b class="fsfunc">glGetIntegeri_v</b>(</code></td><td>GLenum  </td><td><var class="pdparam">pname</var>, </td></tr><tr><td> </td><td>GLuint  </td><td><var class="pdparam">index</var>, </td></tr><tr><td> </td><td>GLint *  </td><td><var class="pdparam">data</var><code>)</code>;</td></tr></table></div></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"><tr><td><code class="funcdef">void <b class="fsfunc">glGetFloati_v</b>(</code></td><td>GLenum  </td><td><var class="pdparam">pname</var>, </td></tr><tr><td> </td><td>GLuint  </td><td><var class="pdparam">index</var>, </td></tr><tr><td> </td><td>GLfloat *  </td><td><var class="pdparam">data</var><code>)</code>;</td></tr></table></div></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"><tr><td><code class="funcdef">void <b class="fsfunc">glGetDoublei_v</b>(</code></td><td>GLenum  </td><td><var class="pdparam">pname</var>, </td></tr><tr><td> </td><td>GLuint  </td><td><var class="pdparam">index</var>, </td></tr><tr><td> </td><td>GLdouble *  </td><td><var class="pdparam">data</var><code>)</code>;</td></tr></table></div></div><div class="refsynopsisdiv"><h2>C Specification</h2><div class="funcsynopsis"><table border="0" summary="Function synopsis" cellspacing="0" cellpadding="0"><tr><td><code class="funcdef">void <b class="fsfunc">glGetInteger64i_v</b>(</code></td><td>GLenum  </td><td><var class="pdparam">pname</var>, </td></tr><tr><td> </td><td>GLuint  </td><td><var class="pdparam">index</var>, </td></tr><tr><td> </td><td>GLint64 *  </td><td><var class="pdparam">data</var><code>)</code>;</td></tr></table></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="parameters2"></a><h2>Parameters</h2><div class="variablelist"><dl><dt><span class="term"><em class="parameter"><code>pname</code></em></span></dt><dd><p>
  10                     Specifies the parameter value to be returned.
  11                     The symbolic constants in the list below are accepted.
  12                 </p></dd><dt><span class="term"><em class="parameter"><code>index</code></em></span></dt><dd><p>
  13                     Specifies the index of the particular element being queried.
  14                 </p></dd><dt><span class="term"><em class="parameter"><code>data</code></em></span></dt><dd><p>
  15                     Returns the value or values of the specified parameter.
  16                 </p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p>
  17             These four commands return values for simple state variables in GL.
  18             <em class="parameter"><code>pname</code></em> is a symbolic constant indicating the state variable to be returned,
  19             and <em class="parameter"><code>params</code></em> is a pointer to an array of the indicated type in
  20             which to place the returned data.
  21         </p><p>
  22             Type conversion is performed if <em class="parameter"><code>params</code></em> has a different type than
  23             the state variable value being requested.
  24             If <code class="function">glGetBooleanv</code> is called,
  25             a floating-point (or integer) value is converted to <code class="constant">GL_FALSE</code> if
  26             and only if it is 0.0 (or 0).
  27             Otherwise,
  28             it is converted to <code class="constant">GL_TRUE</code>.
  29             If <code class="function">glGetIntegerv</code> is called, boolean values are returned as
  30             <code class="constant">GL_TRUE</code> or <code class="constant">GL_FALSE</code>, and most floating-point values are
  31             rounded to the nearest integer value. Floating-point colors and
  32             normals, however, are returned with a linear mapping that maps 1.0 to
  33             the most positive representable integer value
  34             and
  35             <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
  36
  37                 <mml:mn>-1.0</mml:mn>
  38             </mml:math>
  39             to the most negative representable integer value.
  40             If <code class="function">glGetFloatv</code> or <code class="function">glGetDoublev</code> is called,
  41             boolean values are returned as <code class="constant">GL_TRUE</code> or <code class="constant">GL_FALSE</code>,
  42             and integer values are converted to floating-point values.
  43         </p><p>
  44             The following symbolic constants are accepted by <em class="parameter"><code>pname</code></em>:
  45         </p><div class="variablelist"><dl><dt><span class="term"><code class="constant">GL_ACTIVE_TEXTURE</code></span></dt><dd><p>
  46               </p><p>
  47                         <em class="parameter"><code>params</code></em> returns a single value indicating the active multitexture unit.
  48                         The initial value is <code class="constant">GL_TEXTURE0</code>.
  49                         See <a href="glActiveTexture.xml"><span class="citerefentry"><span class="refentrytitle">glActiveTexture</span></span></a>.
  50                     </p></dd><dt><span class="term"><code class="constant">GL_ALIASED_LINE_WIDTH_RANGE</code></span></dt><dd><p>
  51               </p><p>
  52                         <em class="parameter"><code>params</code></em> returns a pair of values indicating the range of
  53                         widths supported for aliased lines. See <a href="glLineWidth.xml"><span class="citerefentry"><span class="refentrytitle">glLineWidth</span></span></a>.
  54                     </p></dd><dt><span class="term"><code class="constant">GL_ARRAY_BUFFER_BINDING</code></span></dt><dd><p>
  55               </p><p>
  56                         <em class="parameter"><code>params</code></em> returns a single value, the name of the buffer object
  57                         currently bound to the target <code class="constant">GL_ARRAY_BUFFER</code>. If no buffer object
  58                         is bound to this target, 0 is returned.  The initial value is 0.
  59                         See <a href="glBindBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glBindBuffer</span></span></a>.
  60                     </p></dd><dt><span class="term"><code class="constant">GL_BLEND</code></span></dt><dd><p>
  61               </p><p>
  62                         <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether blending is
  63                         enabled. The initial value is <code class="constant">GL_FALSE</code>.
  64                         See <a href="glBlendFunc.xml"><span class="citerefentry"><span class="refentrytitle">glBlendFunc</span></span></a>.
  65                     </p></dd><dt><span class="term"><code class="constant">GL_BLEND_COLOR</code></span></dt><dd><p>
  66               </p><p>
  67                         <em class="parameter"><code>params</code></em> returns four values,
  68                         the red, green, blue, and alpha values which are the components of
  69                         the blend color.
  70                         See <a href="glBlendColor.xml"><span class="citerefentry"><span class="refentrytitle">glBlendColor</span></span></a>.
  71                     </p></dd><dt><span class="term"><code class="constant">GL_BLEND_DST_ALPHA</code></span></dt><dd><p>
  72               </p><p>
  73                         <em class="parameter"><code>params</code></em> returns one value,
  74                         the symbolic constant identifying the alpha destination blend
  75                         function. The initial value is <code class="constant">GL_ZERO</code>.
  76                         See <a href="glBlendFunc.xml"><span class="citerefentry"><span class="refentrytitle">glBlendFunc</span></span></a> and <a href="glBlendFuncSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glBlendFuncSeparate</span></span></a>.
  77                     </p></dd><dt><span class="term"><code class="constant">GL_BLEND_DST_RGB</code></span></dt><dd><p>
  78               </p><p>
  79                         <em class="parameter"><code>params</code></em> returns one value,
  80                         the symbolic constant identifying the RGB destination blend
  81                         function. The initial value is <code class="constant">GL_ZERO</code>.
  82                         See <a href="glBlendFunc.xml"><span class="citerefentry"><span class="refentrytitle">glBlendFunc</span></span></a> and <a href="glBlendFuncSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glBlendFuncSeparate</span></span></a>.
  83                     </p></dd><dt><span class="term"><code class="constant">GL_BLEND_EQUATION_RGB</code></span></dt><dd><p>
  84               </p><p>
  85                         <em class="parameter"><code>params</code></em> returns one value, a symbolic constant indicating whether
  86                         the RGB blend equation is <code class="constant">GL_FUNC_ADD</code>, <code class="constant">GL_FUNC_SUBTRACT</code>,
  87                         <code class="constant">GL_FUNC_REVERSE_SUBTRACT</code>, <code class="constant">GL_MIN</code> or <code class="constant">GL_MAX</code>.
  88                         See <a href="glBlendEquationSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glBlendEquationSeparate</span></span></a>.
  89                     </p></dd><dt><span class="term"><code class="constant">GL_BLEND_EQUATION_ALPHA</code></span></dt><dd><p>
  90               </p><p>
  91                         <em class="parameter"><code>params</code></em> returns one value, a symbolic constant indicating whether
  92                         the Alpha blend equation is <code class="constant">GL_FUNC_ADD</code>, <code class="constant">GL_FUNC_SUBTRACT</code>,
  93                         <code class="constant">GL_FUNC_REVERSE_SUBTRACT</code>, <code class="constant">GL_MIN</code> or <code class="constant">GL_MAX</code>.
  94                         See <a href="glBlendEquationSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glBlendEquationSeparate</span></span></a>.
  95                     </p></dd><dt><span class="term"><code class="constant">GL_BLEND_SRC_ALPHA</code></span></dt><dd><p>
  96               </p><p>
  97                         <em class="parameter"><code>params</code></em> returns one value,
  98                         the symbolic constant identifying the alpha source blend function. The initial
  99                         value is <code class="constant">GL_ONE</code>.
 100                         See <a href="glBlendFunc.xml"><span class="citerefentry"><span class="refentrytitle">glBlendFunc</span></span></a> and <a href="glBlendFuncSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glBlendFuncSeparate</span></span></a>.
 101                     </p></dd><dt><span class="term"><code class="constant">GL_BLEND_SRC_RGB</code></span></dt><dd><p>
 102               </p><p>
 103                         <em class="parameter"><code>params</code></em> returns one value,
 104                         the symbolic constant identifying the RGB source blend function. The initial
 105                         value is <code class="constant">GL_ONE</code>.
 106                         See <a href="glBlendFunc.xml"><span class="citerefentry"><span class="refentrytitle">glBlendFunc</span></span></a> and <a href="glBlendFuncSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glBlendFuncSeparate</span></span></a>.
 107                     </p></dd><dt><span class="term"><code class="constant">GL_COLOR_CLEAR_VALUE</code></span></dt><dd><p>
 108               </p><p>
 109                         <em class="parameter"><code>params</code></em> returns four values:
 110                         the red, green, blue, and alpha values used to clear the color buffers.
 111                         Integer values,
 112                         if requested,
 113                         are linearly mapped from the internal floating-point representation such
 114                         that 1.0 returns the most positive representable integer value,
 115                         and
 116                         <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
 117
 118                             <mml:mn>-1.0</mml:mn>
 119                         </mml:math>
 120                         returns the most negative representable integer
 121                         value. The initial value is (0, 0, 0, 0).
 122                         See <a href="glClearColor.xml"><span class="citerefentry"><span class="refentrytitle">glClearColor</span></span></a>.
 123                     </p></dd><dt><span class="term"><code class="constant">GL_COLOR_LOGIC_OP</code></span></dt><dd><p>
 124               </p><p>
 125                         <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether a fragment's
 126                         RGBA color values are merged into the framebuffer using a logical
 127                         operation. The initial value is <code class="constant">GL_FALSE</code>.
 128                         See <a href="glLogicOp.xml"><span class="citerefentry"><span class="refentrytitle">glLogicOp</span></span></a>.
 129                     </p></dd><dt><span class="term"><code class="constant">GL_COLOR_WRITEMASK</code></span></dt><dd><p>
 130               </p><p>
 131                         <em class="parameter"><code>params</code></em> returns four boolean values:
 132                         the red, green, blue, and alpha write enables for the color
 133                         buffers. The initial value is (<code class="constant">GL_TRUE</code>, <code class="constant">GL_TRUE</code>,
 134                         <code class="constant">GL_TRUE</code>, <code class="constant">GL_TRUE</code>).
 135                         See <a href="glColorMask.xml"><span class="citerefentry"><span class="refentrytitle">glColorMask</span></span></a>.
 136                     </p></dd><dt><span class="term"><code class="constant">GL_COMPRESSED_TEXTURE_FORMATS</code></span></dt><dd><p>
 137               </p><p>
 138                         <em class="parameter"><code>params</code></em> returns a list of symbolic
 139                         constants of length <code class="constant">GL_NUM_COMPRESSED_TEXTURE_FORMATS</code>
 140                         indicating which compressed texture formats are available.
 141                         See <a href="glCompressedTexImage2D.xml"><span class="citerefentry"><span class="refentrytitle">glCompressedTexImage2D</span></span></a>.
 142                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_COMPUTE_SHADER_STORAGE_BLOCKS</code></span></dt><dd><p>
 143               </p><p>
 144                         <em class="parameter"><code>params</code></em> returns one value,
 145                         the maximum number of active shader storage blocks that may be accessed by a compute shader.
 146                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_COMBINED_SHADER_STORAGE_BLOCKS</code></span></dt><dd><p>
 147               </p><p>
 148                         <em class="parameter"><code>params</code></em> returns one value,
 149                         the maximum total number of active shader storage blocks that may be accessed by all active shaders.
 150                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_COMPUTE_UNIFORM_BLOCKS</code></span></dt><dd><p>
 151               </p><p>
 152                         <em class="parameter"><code>params</code></em> returns one value,
 153                         the maximum number of uniform blocks per compute shader.  The value must be at least 14.
 154                         See <a href="glUniformBlockBinding.xml"><span class="citerefentry"><span class="refentrytitle">glUniformBlockBinding</span></span></a>.
 155                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_COMPUTE_TEXTURE_IMAGE_UNITS</code></span></dt><dd><p>
 156               </p><p>
 157                         <em class="parameter"><code>params</code></em> returns one value, the maximum supported texture image units that
 158                         can be used to access texture maps from the compute shader. The value may be at least 16.
 159                         See <a href="glActiveTexture.xml"><span class="citerefentry"><span class="refentrytitle">glActiveTexture</span></span></a>.
 160                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_COMPUTE_UNIFORM_COMPONENTS</code></span></dt><dd><p>
 161               </p><p>
 162                         <em class="parameter"><code>params</code></em> returns one value,
 163                         the maximum number of individual floating-point, integer, or boolean values that can be held
 164                         in uniform variable storage for a compute shader. The value must be at least 1024.
 165                         See <a href="glUniform.xml"><span class="citerefentry"><span class="refentrytitle">glUniform</span></span></a>.
 166                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_COMPUTE_ATOMIC_COUNTERS</code></span></dt><dd><p>
 167                     </p><p>
 168                         <em class="parameter"><code>params</code></em> returns a single value, the maximum number of atomic counters available to compute shaders.
 169                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_COMPUTE_ATOMIC_COUNTER_BUFFERS</code></span></dt><dd><p>
 170                     </p><p>
 171                         <em class="parameter"><code>params</code></em> returns a single value, the maximum number of atomic counter buffers that may be accessed by a compute shader.
 172                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_COMBINED_COMPUTE_UNIFORM_COMPONENTS</code></span></dt><dd><p>
 173                     </p><p>
 174                         <em class="parameter"><code>params</code></em> returns one value,
 175                         the number of words for compute shader uniform variables in all uniform
 176                         blocks (including default). The value must be at least 1.
 177                         See <a href="glUniform.xml"><span class="citerefentry"><span class="refentrytitle">glUniform</span></span></a>.
 178                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_COMPUTE_WORK_GROUP_INVOCATIONS</code></span></dt><dd><p>
 179                     </p><p>
 180                         <em class="parameter"><code>params</code></em> returns one value,
 181                         the number of invocations in a single local work group
 182                         (i.e., the product of the three dimensions) that may
 183                         be dispatched to a compute shader.
 184                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_COMPUTE_WORK_GROUP_COUNT</code></span></dt><dd><p>
 185                     </p><p>
 186                         Accepted by the indexed versions of <code class="function">glGet</code>.
 187                         <em class="parameter"><code>params</code></em> the maximum number of work
 188                         groups that may be dispatched to a compute shader. Indices
 189                         0, 1, and 2 correspond to the X, Y and Z dimensions, respectively.
 190                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_COMPUTE_WORK_GROUP_SIZE</code></span></dt><dd><p>
 191                     </p><p>
 192                         Accepted by the indexed versions of <code class="function">glGet</code>.
 193                         <em class="parameter"><code>params</code></em> the maximum size of a work
 194                         groups that may be used during compilation of a compute shader. Indices
 195                         0, 1, and 2 correspond to the X, Y and Z dimensions, respectively.
 196                     </p></dd><dt><span class="term"><code class="constant">GL_DISPATCH_INDIRECT_BUFFER_BINDING</code></span></dt><dd><p>
 197                     </p><p>
 198                         <em class="parameter"><code>params</code></em> returns a single value, the name of the buffer object
 199                         currently bound to the target <code class="constant">GL_DISPATCH_INDIRECT_BUFFER</code>. If no buffer object
 200                         is bound to this target, 0 is returned.  The initial value is 0.
 201                         See <a href="glBindBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glBindBuffer</span></span></a>.
 202                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_DEBUG_GROUP_STACK_DEPTH</code></span></dt><dd><p>
 203                     </p><p>
 204                         <em class="parameter"><code>params</code></em> returns a single value, the maximum depth of the
 205                         debug message group stack.
 206                     </p></dd><dt><span class="term"><code class="constant">GL_DEBUG_GROUP_STACK_DEPTH</code></span></dt><dd><p>
 207                     </p><p>
 208                         <em class="parameter"><code>params</code></em> returns a single value, the current depth of the
 209                         debug message group stack.
 210                     </p></dd><dt><span class="term"><code class="constant">GL_CONTEXT_FLAGS</code></span></dt><dd><p>
 211               </p><p>
 212                         <em class="parameter"><code>params</code></em> returns one value,
 213                         the flags with which the context was created (such as debugging functionality).
 214                     </p></dd><dt><span class="term"><code class="constant">GL_CULL_FACE</code></span></dt><dd><p>
 215               </p><p>
 216                         <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether polygon culling
 217                         is enabled. The initial value is <code class="constant">GL_FALSE</code>.
 218                         See <a href="glCullFace.xml"><span class="citerefentry"><span class="refentrytitle">glCullFace</span></span></a>.
 219                     </p></dd><dt><span class="term"><code class="constant">GL_CURRENT_PROGRAM</code></span></dt><dd><p>
 220               </p><p>
 221                         <em class="parameter"><code>params</code></em> returns one value,
 222                         the name of the program object that is currently active, or 0 if no program object is active.
 223                         See <a href="glUseProgram.xml"><span class="citerefentry"><span class="refentrytitle">glUseProgram</span></span></a>.
 224                     </p></dd><dt><span class="term"><code class="constant">GL_DEPTH_CLEAR_VALUE</code></span></dt><dd><p>
 225               </p><p>
 226                         <em class="parameter"><code>params</code></em> returns one value,
 227                         the value that is used to clear the depth buffer.
 228                         Integer values,
 229                         if requested,
 230                         are linearly mapped from the internal floating-point representation such
 231                         that 1.0 returns the most positive representable integer value,
 232                         and
 233                         <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
 234
 235                             <mml:mn>-1.0</mml:mn>
 236                         </mml:math>
 237                         returns the most negative representable integer
 238                         value. The initial value is 1.
 239                         See <a href="glClearDepth.xml"><span class="citerefentry"><span class="refentrytitle">glClearDepth</span></span></a>.
 240                     </p></dd><dt><span class="term"><code class="constant">GL_DEPTH_FUNC</code></span></dt><dd><p>
 241               </p><p>
 242                         <em class="parameter"><code>params</code></em> returns one value,
 243                         the symbolic constant that indicates the depth comparison
 244                         function. The initial value is <code class="constant">GL_LESS</code>.
 245                         See <a href="glDepthFunc.xml"><span class="citerefentry"><span class="refentrytitle">glDepthFunc</span></span></a>.
 246                     </p></dd><dt><span class="term"><code class="constant">GL_DEPTH_RANGE</code></span></dt><dd><p>
 247               </p><p>
 248                         <em class="parameter"><code>params</code></em> returns two values:
 249                         the near and far mapping limits for the depth buffer.
 250                         Integer values,
 251                         if requested,
 252                         are linearly mapped from the internal floating-point representation such
 253                         that 1.0 returns the most positive representable integer value,
 254                         and
 255                         <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll">
 256
 257                             <mml:mn>-1.0</mml:mn>
 258                         </mml:math>
 259                         returns the most negative representable integer
 260                         value. The initial value is (0, 1).
 261                         See <a href="glDepthRange.xml"><span class="citerefentry"><span class="refentrytitle">glDepthRange</span></span></a>.
 262                     </p></dd><dt><span class="term"><code class="constant">GL_DEPTH_TEST</code></span></dt><dd><p>
 263               </p><p>
 264                         <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether depth testing
 265                         of fragments is enabled. The initial value is <code class="constant">GL_FALSE</code>.
 266                         See <a href="glDepthFunc.xml"><span class="citerefentry"><span class="refentrytitle">glDepthFunc</span></span></a> and <a href="glDepthRange.xml"><span class="citerefentry"><span class="refentrytitle">glDepthRange</span></span></a>.
 267                     </p></dd><dt><span class="term"><code class="constant">GL_DEPTH_WRITEMASK</code></span></dt><dd><p>
 268               </p><p>
 269                         <em class="parameter"><code>params</code></em> returns a single boolean value indicating if the depth buffer
 270                         is enabled for writing. The initial value is <code class="constant">GL_TRUE</code>.
 271                         See <a href="glDepthMask.xml"><span class="citerefentry"><span class="refentrytitle">glDepthMask</span></span></a>.
 272                     </p></dd><dt><span class="term"><code class="constant">GL_DITHER</code></span></dt><dd><p>
 273               </p><p>
 274                         <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether dithering of
 275                         fragment colors and indices is enabled. The initial value is <code class="constant">GL_TRUE</code>.
 276                     </p></dd><dt><span class="term"><code class="constant">GL_DOUBLEBUFFER</code></span></dt><dd><p>
 277               </p><p>
 278                         <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether double buffering
 279                         is supported.
 280                     </p></dd><dt><span class="term"><code class="constant">GL_DRAW_BUFFER</code></span></dt><dd><p>
 281               </p><p>
 282                         <em class="parameter"><code>params</code></em> returns one value,
 283                         a symbolic constant indicating which buffers are being drawn to.
 284                         See <a href="glDrawBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glDrawBuffer</span></span></a>. The initial value is <code class="constant">GL_BACK</code> if there
 285                         are back buffers, otherwise it is <code class="constant">GL_FRONT</code>.
 286                     </p></dd><dt><span class="term"><code class="constant">GL_DRAW_BUFFER</code><span class="emphasis"><em>i</em></span></span></dt><dd><p>
 287               </p><p>
 288                         <em class="parameter"><code>params</code></em> returns one value,
 289                         a symbolic constant indicating which buffers are being drawn to by the corresponding output color.
 290                         See <a href="glDrawBuffers.xml"><span class="citerefentry"><span class="refentrytitle">glDrawBuffers</span></span></a>.
 291                         The initial value of <code class="constant">GL_DRAW_BUFFER0</code> is <code class="constant">GL_BACK</code> if there
 292                         are back buffers, otherwise it is <code class="constant">GL_FRONT</code>.  The
 293                         initial values of draw buffers for all other output colors is <code class="constant">GL_NONE</code>.
 294                     </p></dd><dt><span class="term"><code class="constant">GL_DRAW_FRAMEBUFFER_BINDING</code></span></dt><dd><p>
 295               </p><p>
 296                         <em class="parameter"><code>params</code></em> returns one value,
 297                         the name of the framebuffer object currently bound to the <code class="constant">GL_DRAW_FRAMEBUFFER</code> target.
 298                         If the default framebuffer is bound, this value will be zero. The initial value is zero.
 299                         See <a href="glBindFramebuffer.xml"><span class="citerefentry"><span class="refentrytitle">glBindFramebuffer</span></span></a>.
 300                     </p></dd><dt><span class="term"><code class="constant">GL_READ_FRAMEBUFFER_BINDING</code></span></dt><dd><p>
 301               </p><p>
 302                         <em class="parameter"><code>params</code></em> returns one value,
 303                         the name of the framebuffer object currently bound to the <code class="constant">GL_READ_FRAMEBUFFER</code> target.
 304                         If the default framebuffer is bound, this value will be zero. The initial value is zero.
 305                         See <a href="glBindFramebuffer.xml"><span class="citerefentry"><span class="refentrytitle">glBindFramebuffer</span></span></a>.
 306                     </p></dd><dt><span class="term"><code class="constant">GL_ELEMENT_ARRAY_BUFFER_BINDING</code></span></dt><dd><p>
 307               </p><p>
 308                         <em class="parameter"><code>params</code></em> returns a single value, the name of the buffer object
 309                         currently bound to the target <code class="constant">GL_ELEMENT_ARRAY_BUFFER</code>. If no buffer object
 310                         is bound to this target, 0 is returned.  The initial value is 0.
 311                         See <a href="glBindBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glBindBuffer</span></span></a>.
 312                     </p></dd><dt><span class="term"><code class="constant">GL_FRAGMENT_SHADER_DERIVATIVE_HINT</code></span></dt><dd><p>
 313               </p><p>
 314                         <em class="parameter"><code>params</code></em> returns one value,
 315                         a symbolic constant indicating the mode of the derivative accuracy hint
 316                         for fragment shaders. The initial value
 317                         is <code class="constant">GL_DONT_CARE</code>.
 318                         See <a href="glHint.xml"><span class="citerefentry"><span class="refentrytitle">glHint</span></span></a>.
 319                     </p></dd><dt><span class="term"><code class="constant">GL_IMPLEMENTATION_COLOR_READ_FORMAT</code></span></dt><dd><p>
 320               </p><p>
 321                         <em class="parameter"><code>params</code></em> returns a single GLenum value indicating
 322                         the implementation's preferred pixel data format.
 323                         See <a href="glReadPixels.xml"><span class="citerefentry"><span class="refentrytitle">glReadPixels</span></span></a>.
 324                     </p></dd><dt><span class="term"><code class="constant">GL_IMPLEMENTATION_COLOR_READ_TYPE</code></span></dt><dd><p>
 325               </p><p>
 326                         <em class="parameter"><code>params</code></em> returns a single GLenum value indicating
 327                         the implementation's preferred pixel data type.
 328                         See <a href="glReadPixels.xml"><span class="citerefentry"><span class="refentrytitle">glReadPixels</span></span></a>.
 329                     </p></dd><dt><span class="term"><code class="constant">GL_LINE_SMOOTH</code></span></dt><dd><p>
 330               </p><p>
 331                         <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether antialiasing of
 332                         lines is enabled. The initial value is <code class="constant">GL_FALSE</code>.
 333                         See <a href="glLineWidth.xml"><span class="citerefentry"><span class="refentrytitle">glLineWidth</span></span></a>.
 334                     </p></dd><dt><span class="term"><code class="constant">GL_LINE_SMOOTH_HINT</code></span></dt><dd><p>
 335               </p><p>
 336                         <em class="parameter"><code>params</code></em> returns one value,
 337                         a symbolic constant indicating the mode of the line antialiasing
 338                         hint. The initial value is <code class="constant">GL_DONT_CARE</code>.
 339                         See <a href="glHint.xml"><span class="citerefentry"><span class="refentrytitle">glHint</span></span></a>.
 340                     </p></dd><dt><span class="term"><code class="constant">GL_LINE_WIDTH</code></span></dt><dd><p>
 341               </p><p>
 342                         <em class="parameter"><code>params</code></em> returns one value,
 343                         the line width as specified with <a href="glLineWidth.xml"><span class="citerefentry"><span class="refentrytitle">glLineWidth</span></span></a>. The initial value is
 344                         1.
 345                     </p></dd><dt><span class="term"><code class="constant">GL_LAYER_PROVOKING_VERTEX</code></span></dt><dd><p>
 346               </p><p>
 347                         <em class="parameter"><code>params</code></em> returns one value,
 348                         the implementation dependent specifc vertex of a primitive that is used to select the rendering layer.
 349                         If the value returned is equivalent to <code class="constant">GL_PROVOKING_VERTEX</code>, then the vertex
 350                         selection follows the convention specified by
 351                         <a href="glProvokingVertex.xml"><span class="citerefentry"><span class="refentrytitle">glProvokingVertex</span></span></a>.
 352                         If the value returned is equivalent to <code class="constant">GL_FIRST_VERTEX_CONVENTION</code>, then the
 353                         selection is always taken from the first vertex in the primitive.
 354                         If the value returned is equivalent to <code class="constant">GL_LAST_VERTEX_CONVENTION</code>, then the
 355                         selection is always taken from the last vertex in the primitive.
 356                         If the value returned is equivalent to <code class="constant">GL_UNDEFINED_VERTEX</code>, then the
 357                         selection is not guaranteed to be taken from any specific vertex in the primitive.
 358                     </p></dd><dt><span class="term"><code class="constant">GL_LINE_WIDTH_GRANULARITY</code></span></dt><dd><p>
 359               </p><p>
 360                         <em class="parameter"><code>params</code></em> returns one value,
 361                         the width difference between adjacent supported widths for antialiased lines.
 362                         See <a href="glLineWidth.xml"><span class="citerefentry"><span class="refentrytitle">glLineWidth</span></span></a>.
 363                     </p></dd><dt><span class="term"><code class="constant">GL_LINE_WIDTH_RANGE</code></span></dt><dd><p>
 364               </p><p>
 365                         <em class="parameter"><code>params</code></em> returns two values:
 366                         the smallest and largest supported widths for antialiased
 367                         lines.
 368                         See <a href="glLineWidth.xml"><span class="citerefentry"><span class="refentrytitle">glLineWidth</span></span></a>.
 369                     </p></dd><dt><span class="term"><code class="constant">GL_LOGIC_OP_MODE</code></span></dt><dd><p>
 370               </p><p>
 371                         <em class="parameter"><code>params</code></em> returns one value,
 372                         a symbolic constant indicating the selected logic operation
 373                         mode. The initial value is <code class="constant">GL_COPY</code>.
 374                         See <a href="glLogicOp.xml"><span class="citerefentry"><span class="refentrytitle">glLogicOp</span></span></a>.
 375                     </p></dd><dt><span class="term"><code class="constant">GL_MAJOR_VERSION</code></span></dt><dd><p>
 376               </p><p>
 377                         <em class="parameter"><code>params</code></em> returns one value,
 378                         the major version number of the OpenGL API supported by the current context.
 379                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_3D_TEXTURE_SIZE</code></span></dt><dd><p>
 380               </p><p>
 381                         <em class="parameter"><code>params</code></em> returns one value,
 382                         a rough estimate of the largest 3D texture that the GL can handle.
 383                         The value must be at least 64.
 384                         Use <code class="constant">GL_PROXY_TEXTURE_3D</code> to determine if a texture is too large.
 385                         See <a href="glTexImage3D.xml"><span class="citerefentry"><span class="refentrytitle">glTexImage3D</span></span></a>.
 386                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_ARRAY_TEXTURE_LAYERS</code></span></dt><dd><p>
 387               </p><p>
 388                         <em class="parameter"><code>params</code></em> returns one value.
 389                         The value indicates the maximum number of layers allowed in an array texture, and must be at least 256.
 390                         See <a href="glTexImage2D.xml"><span class="citerefentry"><span class="refentrytitle">glTexImage2D</span></span></a>.
 391                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_CLIP_DISTANCES</code></span></dt><dd><p>
 392               </p><p>
 393                         <em class="parameter"><code>params</code></em> returns one value,
 394                         the maximum number of application-defined clipping distances. The value must be at least 8.
 395                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_COLOR_TEXTURE_SAMPLES</code></span></dt><dd><p>
 396               </p><p>
 397                         <em class="parameter"><code>params</code></em> returns one value,
 398                         the maximum number of samples in a color multisample texture.
 399                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_COMBINED_ATOMIC_COUNTERS</code></span></dt><dd><p>
 400               </p><p>
 401                         <em class="parameter"><code>params</code></em> returns a single value, the maximum number of atomic counters available to all active shaders.
 402                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS</code></span></dt><dd><p>
 403               </p><p>
 404                         <em class="parameter"><code>params</code></em> returns one value,
 405                         the number of words for fragment shader uniform variables in all uniform
 406                         blocks (including default). The value must be at least 1.
 407                         See <a href="glUniform.xml"><span class="citerefentry"><span class="refentrytitle">glUniform</span></span></a>.
 408                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_COMBINED_GEOMETRY_UNIFORM_COMPONENTS</code></span></dt><dd><p>
 409               </p><p>
 410                         <em class="parameter"><code>params</code></em> returns one value,
 411                         the number of words for geometry shader uniform variables in all uniform
 412                         blocks (including default). The value must be at least 1.
 413                         See <a href="glUniform.xml"><span class="citerefentry"><span class="refentrytitle">glUniform</span></span></a>.
 414                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS</code></span></dt><dd><p>
 415               </p><p>
 416                         <em class="parameter"><code>params</code></em> returns one value, the maximum supported texture image units that
 417                         can be used to access texture maps from the vertex shader and the fragment processor combined.
 418                         If both the vertex shader and the fragment processing stage access the same texture image
 419                         unit, then that counts as using two texture image units against this limit.
 420                         The value must be at least 48.
 421                         See <a href="glActiveTexture.xml"><span class="citerefentry"><span class="refentrytitle">glActiveTexture</span></span></a>.
 422                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_COMBINED_UNIFORM_BLOCKS</code></span></dt><dd><p>
 423               </p><p>
 424                         <em class="parameter"><code>params</code></em> returns one value,
 425                         the maximum number of uniform blocks per program.  The value must be at least 36.
 426                         See <a href="glUniformBlockBinding.xml"><span class="citerefentry"><span class="refentrytitle">glUniformBlockBinding</span></span></a>.
 427                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS</code></span></dt><dd><p>
 428               </p><p>
 429                         <em class="parameter"><code>params</code></em> returns one value,
 430                         the number of words for vertex shader uniform variables in all uniform
 431                         blocks (including default). The value must be at least 1.
 432                         See <a href="glUniform.xml"><span class="citerefentry"><span class="refentrytitle">glUniform</span></span></a>.
 433                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_CUBE_MAP_TEXTURE_SIZE</code></span></dt><dd><p>
 434               </p><p>
 435                         <em class="parameter"><code>params</code></em> returns one value.
 436                         The value gives a rough estimate of the largest cube-map texture that
 437                         the GL can handle. The value must be at least 1024.
 438                         Use <code class="constant">GL_PROXY_TEXTURE_CUBE_MAP</code>
 439                         to determine if a texture is too large.
 440                         See <a href="glTexImage2D.xml"><span class="citerefentry"><span class="refentrytitle">glTexImage2D</span></span></a>.
 441                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_DEPTH_TEXTURE_SAMPLES</code></span></dt><dd><p>
 442               </p><p>
 443                         <em class="parameter"><code>params</code></em> returns one value,
 444                         the maximum number of samples in a multisample depth or depth-stencil texture.
 445                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_DRAW_BUFFERS</code></span></dt><dd><p>
 446               </p><p>
 447                         <em class="parameter"><code>params</code></em> returns one value, the maximum number
 448                         of simultaneous outputs that may be written in a fragment shader.
 449                         The value must be at least 8.
 450                         See <a href="glDrawBuffers.xml"><span class="citerefentry"><span class="refentrytitle">glDrawBuffers</span></span></a>.
 451                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_DUALSOURCE_DRAW_BUFFERS</code></span></dt><dd><p>
 452               </p><p>
 453                         <em class="parameter"><code>params</code></em> returns one value, the maximum number
 454                         of active draw buffers when using dual-source  blending. The value must be at least 1.
 455                         See <a href="glBlendFunc.xml"><span class="citerefentry"><span class="refentrytitle">glBlendFunc</span></span></a> and
 456                         <a href="glBlendFuncSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glBlendFuncSeparate</span></span></a>.
 457                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_ELEMENTS_INDICES</code></span></dt><dd><p>
 458               </p><p>
 459                         <em class="parameter"><code>params</code></em> returns one value,
 460                         the recommended maximum number of vertex array indices.
 461                         See <a href="glDrawRangeElements.xml"><span class="citerefentry"><span class="refentrytitle">glDrawRangeElements</span></span></a>.
 462                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_ELEMENTS_VERTICES</code></span></dt><dd><p>
 463               </p><p>
 464                         <em class="parameter"><code>params</code></em> returns one value,
 465                         the recommended maximum number of vertex array vertices.
 466                         See <a href="glDrawRangeElements.xml"><span class="citerefentry"><span class="refentrytitle">glDrawRangeElements</span></span></a>.
 467                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_FRAGMENT_ATOMIC_COUNTERS</code></span></dt><dd><p>
 468               </p><p>
 469                         <em class="parameter"><code>params</code></em> returns a single value, the maximum number of atomic counters available to fragment shaders.
 470                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_FRAGMENT_SHADER_STORAGE_BLOCKS</code></span></dt><dd><p>
 471               </p><p>
 472                         <em class="parameter"><code>params</code></em> returns one value,
 473                         the maximum number of active shader storage blocks that may be accessed by a fragment shader.
 474                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_FRAGMENT_INPUT_COMPONENTS</code></span></dt><dd><p>
 475               </p><p>
 476                         <em class="parameter"><code>params</code></em> returns one value,
 477                         the maximum number of components of the inputs read by the fragment shader, which must be at least 128.
 478                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_FRAGMENT_UNIFORM_COMPONENTS</code></span></dt><dd><p>
 479               </p><p>
 480                         <em class="parameter"><code>params</code></em> returns one value,
 481                         the maximum number of individual floating-point, integer, or boolean values that can be held
 482                         in uniform variable storage for a fragment shader. The value must be at least 1024.
 483                         See <a href="glUniform.xml"><span class="citerefentry"><span class="refentrytitle">glUniform</span></span></a>.
 484                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_FRAGMENT_UNIFORM_VECTORS</code></span></dt><dd><p>
 485               </p><p>
 486                         <em class="parameter"><code>params</code></em> returns one value,
 487                         the maximum number of individual 4-vectors of floating-point, integer, or boolean values
 488                         that can be held
 489                         in uniform variable storage for a fragment shader. The value is equal to the value of
 490                         <code class="constant">GL_MAX_FRAGMENT_UNIFORM_COMPONENTS</code> divided by 4 and must be at least 256.
 491                         See <a href="glUniform.xml"><span class="citerefentry"><span class="refentrytitle">glUniform</span></span></a>.
 492                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_FRAGMENT_UNIFORM_BLOCKS</code></span></dt><dd><p>
 493               </p><p>
 494                         <em class="parameter"><code>params</code></em> returns one value,
 495                         the maximum number of uniform blocks per fragment shader.  The value must be at least 12.
 496                         See <a href="glUniformBlockBinding.xml"><span class="citerefentry"><span class="refentrytitle">glUniformBlockBinding</span></span></a>.
 497                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_FRAMEBUFFER_WIDTH</code></span></dt><dd><p>
 498               </p><p>
 499                         <em class="parameter"><code>params</code></em> returns one value,
 500                         the maximum width for a framebuffer that has no attachments, which must be at least 16384.
 501                         See <a href="glFramebufferParameter.xml"><span class="citerefentry"><span class="refentrytitle">glFramebufferParameter</span></span></a>.
 502                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_FRAMEBUFFER_HEIGHT</code></span></dt><dd><p>
 503               </p><p>
 504                         <em class="parameter"><code>params</code></em> returns one value,
 505                         the maximum height for a framebuffer that has no attachments, which must be at least 16384.
 506                         See <a href="glFramebufferParameter.xml"><span class="citerefentry"><span class="refentrytitle">glFramebufferParameter</span></span></a>.
 507                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_FRAMEBUFFER_LAYERS</code></span></dt><dd><p>
 508               </p><p>
 509                         <em class="parameter"><code>params</code></em> returns one value,
 510                         the maximum number of layers for a framebuffer that has no attachments, which must be at least 2048.
 511                         See <a href="glFramebufferParameter.xml"><span class="citerefentry"><span class="refentrytitle">glFramebufferParameter</span></span></a>.
 512                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_FRAMEBUFFER_SAMPLES</code></span></dt><dd><p>
 513               </p><p>
 514                         <em class="parameter"><code>params</code></em> returns one value,
 515                         the maximum samples in a framebuffer that has no attachments, which must be at least 4.
 516                         See <a href="glFramebufferParameter.xml"><span class="citerefentry"><span class="refentrytitle">glFramebufferParameter</span></span></a>.
 517                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_GEOMETRY_ATOMIC_COUNTERS</code></span></dt><dd><p>
 518               </p><p>
 519                         <em class="parameter"><code>params</code></em> returns a single value, the maximum number of atomic counters available to geometry shaders.
 520                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_GEOMETRY_SHADER_STORAGE_BLOCKS</code></span></dt><dd><p>
 521               </p><p>
 522                         <em class="parameter"><code>params</code></em> returns one value,
 523                         the maximum number of active shader storage blocks that may be accessed by a geometry shader.
 524                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_GEOMETRY_INPUT_COMPONENTS</code></span></dt><dd><p>
 525               </p><p>
 526                         <em class="parameter"><code>params</code></em> returns one value,
 527                         the maximum number of components of inputs read by a geometry shader, which must be at least 64.
 528                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_GEOMETRY_OUTPUT_COMPONENTS</code></span></dt><dd><p>
 529               </p><p>
 530                         <em class="parameter"><code>params</code></em> returns one value,
 531                         the maximum number of components of outputs written by a geometry shader, which must be at least 128.
 532                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS</code></span></dt><dd><p>
 533               </p><p>
 534                         <em class="parameter"><code>params</code></em> returns one value, the maximum supported texture image units that
 535                         can be used to access texture maps from the geometry shader. The value must be at least 16.
 536                         See <a href="glActiveTexture.xml"><span class="citerefentry"><span class="refentrytitle">glActiveTexture</span></span></a>.
 537                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_GEOMETRY_UNIFORM_BLOCKS</code></span></dt><dd><p>
 538               </p><p>
 539                         <em class="parameter"><code>params</code></em> returns one value,
 540                         the maximum number of uniform blocks per geometry shader.  The value must be at least 12.
 541                         See <a href="glUniformBlockBinding.xml"><span class="citerefentry"><span class="refentrytitle">glUniformBlockBinding</span></span></a>.
 542                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_GEOMETRY_UNIFORM_COMPONENTS</code></span></dt><dd><p>
 543               </p><p>
 544                         <em class="parameter"><code>params</code></em> returns one value,
 545                         the maximum number of individual floating-point, integer, or boolean values that can be held
 546                         in uniform variable storage for a geometry shader. The value must be at least 1024.
 547                         See <a href="glUniform.xml"><span class="citerefentry"><span class="refentrytitle">glUniform</span></span></a>.
 548                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_INTEGER_SAMPLES</code></span></dt><dd><p>
 549               </p><p>
 550                         <em class="parameter"><code>params</code></em> returns one value,
 551                         the maximum number of samples supported in integer format multisample buffers.
 552                     </p></dd><dt><span class="term"><code class="constant">GL_MIN_MAP_BUFFER_ALIGNMENT</code></span></dt><dd><p>
 553               </p><p>
 554                         <em class="parameter"><code>params</code></em> returns one value,
 555                         the minimum alignment in basic machine units of pointers returned from<a href="glMapBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glMapBuffer</span></span></a>
 556                         and <a href="glMapBufferRange.xml"><span class="citerefentry"><span class="refentrytitle">glMapBufferRange</span></span></a>. This value must be a power of two and must
 557                         be at least 64.
 558                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_LABEL_LENGTH</code></span></dt><dd><p>
 559               </p><p>
 560                         <em class="parameter"><code>params</code></em> returns one value,
 561                         the maximum length of a label that may be assigned to an object.
 562                         See <a href="glObjectLabel.xml"><span class="citerefentry"><span class="refentrytitle">glObjectLabel</span></span></a> and
 563                         <a href="glObjectPtrLabel.xml"><span class="citerefentry"><span class="refentrytitle">glObjectPtrLabel</span></span></a>.
 564                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_PROGRAM_TEXEL_OFFSET</code></span></dt><dd><p>
 565               </p><p>
 566                         <em class="parameter"><code>params</code></em> returns one value,
 567                         the maximum texel offset allowed in a texture lookup, which must be at least 7.
 568                     </p></dd><dt><span class="term"><code class="constant">GL_MIN_PROGRAM_TEXEL_OFFSET</code></span></dt><dd><p>
 569               </p><p>
 570                         <em class="parameter"><code>params</code></em> returns one value,
 571                         the minimum texel offset allowed in a texture lookup, which must be at most -8.
 572                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_RECTANGLE_TEXTURE_SIZE</code></span></dt><dd><p>
 573               </p><p>
 574                         <em class="parameter"><code>params</code></em> returns one value.
 575                         The value gives a rough estimate of the largest rectangular texture that
 576                         the GL can handle. The value must be at least 1024.
 577                         Use <code class="constant">GL_PROXY_RECTANGLE_TEXTURE</code>
 578                         to determine if a texture is too large.
 579                         See <a href="glTexImage2D.xml"><span class="citerefentry"><span class="refentrytitle">glTexImage2D</span></span></a>.
 580                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_RENDERBUFFER_SIZE</code></span></dt><dd><p>
 581               </p><p>
 582                         <em class="parameter"><code>params</code></em> returns one value.
 583                         The value indicates the maximum supported size for renderbuffers.
 584                         See <a href="glFramebufferRenderbuffer.xml"><span class="citerefentry"><span class="refentrytitle">glFramebufferRenderbuffer</span></span></a>.
 585                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_SAMPLE_MASK_WORDS</code></span></dt><dd><p>
 586               </p><p>
 587                         <em class="parameter"><code>params</code></em> returns one value,
 588                         the maximum number of sample mask words.
 589                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_SERVER_WAIT_TIMEOUT</code></span></dt><dd><p>
 590               </p><p>
 591                         <em class="parameter"><code>params</code></em> returns one value,
 592                         the maximum <a href="glWaitSync.xml"><span class="citerefentry"><span class="refentrytitle">glWaitSync</span></span></a> timeout interval.
 593                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_SHADER_STORAGE_BUFFER_BINDINGS</code></span></dt><dd><p>
 594               </p><p>
 595                         <em class="parameter"><code>params</code></em> returns one value,
 596                         the maximum number of shader storage buffer binding points on the context, which must be at least 8.
 597                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_TESS_CONTROL_ATOMIC_COUNTERS</code></span></dt><dd><p>
 598               </p><p>
 599                         <em class="parameter"><code>params</code></em> returns a single value, the maximum number of atomic counters available to tessellation control shaders.
 600                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_TESS_EVALUATION_ATOMIC_COUNTERS</code></span></dt><dd><p>
 601               </p><p>
 602                         <em class="parameter"><code>params</code></em> returns a single value, the maximum number of atomic counters available to tessellation evaluation shaders.
 603                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_TESS_CONTROL_SHADER_STORAGE_BLOCKS</code></span></dt><dd><p>
 604               </p><p>
 605                         <em class="parameter"><code>params</code></em> returns one value,
 606                         the maximum number of active shader storage blocks that may be accessed by a tessellation control shader.
 607                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_TESS_EVALUATION_SHADER_STORAGE_BLOCKS</code></span></dt><dd><p>
 608               </p><p>
 609                         <em class="parameter"><code>params</code></em> returns one value,
 610                         the maximum number of active shader storage blocks that may be accessed by a tessellation evaluation shader.
 611                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_TEXTURE_BUFFER_SIZE</code></span></dt><dd><p>
 612               </p><p>
 613                         <em class="parameter"><code>params</code></em> returns one value.
 614                         The value gives the maximum number of texels allowed in the texel array of a texture buffer object.
 615                         Value must be at least 65536.
 616                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_TEXTURE_IMAGE_UNITS</code></span></dt><dd><p>
 617               </p><p>
 618                         <em class="parameter"><code>params</code></em> returns one value, the maximum supported texture image units that
 619                         can be used to access texture maps from the fragment shader.
 620                         The value must be at least 16.
 621                         See <a href="glActiveTexture.xml"><span class="citerefentry"><span class="refentrytitle">glActiveTexture</span></span></a>.
 622                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_TEXTURE_LOD_BIAS</code></span></dt><dd><p>
 623               </p><p>
 624                         <em class="parameter"><code>params</code></em> returns one value,
 625                         the maximum, absolute value of the texture level-of-detail bias.  The
 626                         value must be at least 2.0.
 627                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_TEXTURE_SIZE</code></span></dt><dd><p>
 628               </p><p>
 629                         <em class="parameter"><code>params</code></em> returns one value.
 630                         The value gives a rough estimate of the largest texture that
 631                         the GL can handle. The value must be at least 1024.
 632                         Use a proxy texture target such as <code class="constant">GL_PROXY_TEXTURE_1D</code> or <code class="constant">GL_PROXY_TEXTURE_2D</code>
 633                         to determine if a texture is too large.
 634                         See <a href="glTexImage1D.xml"><span class="citerefentry"><span class="refentrytitle">glTexImage1D</span></span></a> and <a href="glTexImage2D.xml"><span class="citerefentry"><span class="refentrytitle">glTexImage2D</span></span></a>.
 635                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_UNIFORM_BUFFER_BINDINGS</code></span></dt><dd><p>
 636               </p><p>
 637                         <em class="parameter"><code>params</code></em> returns one value,
 638                         the maximum number of uniform buffer binding points on the context, which must be at least 36.
 639                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_UNIFORM_BLOCK_SIZE</code></span></dt><dd><p>
 640               </p><p>
 641                         <em class="parameter"><code>params</code></em> returns one value,
 642                         the maximum size in basic machine units of a uniform block, which must be at least 16384.
 643                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_UNIFORM_LOCATIONS</code></span></dt><dd><p>
 644               </p><p>
 645                         <em class="parameter"><code>params</code></em> returns one value,
 646                         the maximum number of explicitly assignable uniform locations, which must be at least 1024.
 647                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_VARYING_COMPONENTS</code></span></dt><dd><p>
 648               </p><p>
 649                         <em class="parameter"><code>params</code></em> returns one value,
 650                         the number components for varying variables, which must be at least 60.
 651                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_VARYING_VECTORS</code></span></dt><dd><p>
 652               </p><p>
 653                         <em class="parameter"><code>params</code></em> returns one value,
 654                         the number 4-vectors for varying variables, which is equal to the value of
 655                         <code class="constant">GL_MAX_VARYING_COMPONENTS</code> and must be at least 15.
 656                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_VARYING_FLOATS</code></span></dt><dd><p>
 657               </p><p>
 658                         <em class="parameter"><code>params</code></em> returns one value,
 659                         the maximum number of interpolators available for processing varying variables used by
 660                         vertex and fragment shaders. This value represents the number of individual floating-point
 661                         values that can be interpolated; varying variables declared as vectors, matrices, and arrays
 662                         will all consume multiple interpolators. The value must be at least 32.
 663                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_VERTEX_ATOMIC_COUNTERS</code></span></dt><dd><p>
 664               </p><p>
 665                         <em class="parameter"><code>params</code></em> returns a single value, the maximum number of atomic counters available to vertex shaders.
 666                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_VERTEX_ATTRIBS</code></span></dt><dd><p>
 667               </p><p>
 668                         <em class="parameter"><code>params</code></em> returns one value,
 669                         the maximum number of 4-component generic vertex attributes accessible to a vertex shader.
 670                         The value must be at least 16.
 671                         See <a href="glVertexAttrib.xml"><span class="citerefentry"><span class="refentrytitle">glVertexAttrib</span></span></a>.
 672                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_VERTEX_SHADER_STORAGE_BLOCKS</code></span></dt><dd><p>
 673               </p><p>
 674                         <em class="parameter"><code>params</code></em> returns one value,
 675                         the maximum number of active shader storage blocks that may be accessed by a vertex shader.
 676                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS</code></span></dt><dd><p>
 677               </p><p>
 678                         <em class="parameter"><code>params</code></em> returns one value, the maximum supported texture image units that
 679                         can be used to access texture maps from the vertex shader. The value may be at least 16.
 680                         See <a href="glActiveTexture.xml"><span class="citerefentry"><span class="refentrytitle">glActiveTexture</span></span></a>.
 681                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_VERTEX_UNIFORM_COMPONENTS</code></span></dt><dd><p>
 682               </p><p>
 683                         <em class="parameter"><code>params</code></em> returns one value,
 684                         the maximum number of individual floating-point, integer, or boolean values that can be held
 685                         in uniform variable storage for a vertex shader. The value must be at least 1024.
 686                         See <a href="glUniform.xml"><span class="citerefentry"><span class="refentrytitle">glUniform</span></span></a>.
 687                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_VERTEX_UNIFORM_VECTORS</code></span></dt><dd><p>
 688               </p><p>
 689                         <em class="parameter"><code>params</code></em> returns one value,
 690                         the maximum number of 4-vectors that may be held in uniform variable storage for the vertex
 691                         shader. The value of <code class="constant">GL_MAX_VERTEX_UNIFORM_VECTORS</code> is equal to the
 692                         value of <code class="constant">GL_MAX_VERTEX_UNIFORM_COMPONENTS</code> and must be at least
 693                         256.
 694                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_VERTEX_OUTPUT_COMPONENTS</code></span></dt><dd><p>
 695               </p><p>
 696                         <em class="parameter"><code>params</code></em> returns one value,
 697                         the maximum number of components of output written by a vertex shader, which must be at least 64.
 698                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_VERTEX_UNIFORM_BLOCKS</code></span></dt><dd><p>
 699               </p><p>
 700                         <em class="parameter"><code>params</code></em> returns one value,
 701                         the maximum number of uniform blocks per vertex shader.  The value must be at least 12.
 702                         See <a href="glUniformBlockBinding.xml"><span class="citerefentry"><span class="refentrytitle">glUniformBlockBinding</span></span></a>.
 703                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_VIEWPORT_DIMS</code></span></dt><dd><p>
 704               </p><p>
 705                         <em class="parameter"><code>params</code></em> returns two values:
 706                         the maximum supported width and height of the viewport.
 707                         These must be at least as large as the visible dimensions of the display
 708                         being rendered to.
 709                         See <a href="glViewport.xml"><span class="citerefentry"><span class="refentrytitle">glViewport</span></span></a>.
 710                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_VIEWPORTS</code></span></dt><dd><p>
 711               </p><p>
 712                         <em class="parameter"><code>params</code></em> returns one value, the maximum number
 713                         of simultaneous viewports that are supported.
 714                         The value must be at least 16.
 715                         See <a href="glViewportIndexed.xml"><span class="citerefentry"><span class="refentrytitle">glViewportIndexed</span></span></a>.
 716                     </p></dd><dt><span class="term"><code class="constant">GL_MINOR_VERSION</code></span></dt><dd><p>
 717               </p><p>
 718                         <em class="parameter"><code>params</code></em> returns one value,
 719                         the minor version number of the OpenGL API supported by the current context.
 720                     </p></dd><dt><span class="term"><code class="constant">GL_NUM_COMPRESSED_TEXTURE_FORMATS</code></span></dt><dd><p>
 721               </p><p>
 722                         <em class="parameter"><code>params</code></em> returns a single integer value indicating the number of available
 723                         compressed texture formats.  The minimum value is 4.
 724                         See <a href="glCompressedTexImage2D.xml"><span class="citerefentry"><span class="refentrytitle">glCompressedTexImage2D</span></span></a>.
 725                     </p></dd><dt><span class="term"><code class="constant">GL_NUM_EXTENSIONS</code></span></dt><dd><p>
 726               </p><p>
 727                         <em class="parameter"><code>params</code></em> returns one value,
 728                         the number of extensions supported by the GL implementation for the current context.
 729                         See <a href="glGetString.xml"><span class="citerefentry"><span class="refentrytitle">glGetString</span></span></a>.
 730                     </p></dd><dt><span class="term"><code class="constant">GL_NUM_PROGRAM_BINARY_FORMATS</code></span></dt><dd><p>
 731               </p><p>
 732                         <em class="parameter"><code>params</code></em> returns one value,
 733                         the number of program binary formats supported by the implementation.
 734                     </p></dd><dt><span class="term"><code class="constant">GL_NUM_SHADER_BINARY_FORMATS</code></span></dt><dd><p>
 735               </p><p>
 736                         <em class="parameter"><code>params</code></em> returns one value,
 737                         the number of binary shader formats supported by the implementation. If this value is
 738                         greater than zero, then the implementation supports loading binary shaders. If it is
 739                         zero, then the loading of binary shaders by the implementation is not supported.
 740                     </p></dd><dt><span class="term"><code class="constant">GL_PACK_ALIGNMENT</code></span></dt><dd><p>
 741               </p><p>
 742                         <em class="parameter"><code>params</code></em> returns one value,
 743                         the byte alignment used for writing pixel data to memory. The initial
 744                         value is 4.
 745                         See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>.
 746                     </p></dd><dt><span class="term"><code class="constant">GL_PACK_IMAGE_HEIGHT</code></span></dt><dd><p>
 747               </p><p>
 748                         <em class="parameter"><code>params</code></em> returns one value,
 749                         the image height used for writing pixel data to memory.  The initial
 750                         value is 0.
 751                         See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>.
 752                     </p></dd><dt><span class="term"><code class="constant">GL_PACK_LSB_FIRST</code></span></dt><dd><p>
 753               </p><p>
 754                         <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether single-bit
 755                         pixels being written to memory are written first to the least significant
 756                         bit of each unsigned byte. The initial value is <code class="constant">GL_FALSE</code>.
 757                         See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>.
 758                     </p></dd><dt><span class="term"><code class="constant">GL_PACK_ROW_LENGTH</code></span></dt><dd><p>
 759               </p><p>
 760                         <em class="parameter"><code>params</code></em> returns one value,
 761                         the row length used for writing pixel data to memory. The initial value is
 762                         0.
 763                         See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>.
 764                     </p></dd><dt><span class="term"><code class="constant">GL_PACK_SKIP_IMAGES</code></span></dt><dd><p>
 765               </p><p>
 766                         <em class="parameter"><code>params</code></em> returns one value,
 767                         the number of pixel images skipped before the first pixel is written
 768                         into memory. The initial value is 0.
 769                         See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>.
 770                     </p></dd><dt><span class="term"><code class="constant">GL_PACK_SKIP_PIXELS</code></span></dt><dd><p>
 771               </p><p>
 772                         <em class="parameter"><code>params</code></em> returns one value,
 773                         the number of pixel locations skipped before the first pixel is written
 774                         into memory. The initial value is 0.
 775                         See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>.
 776                     </p></dd><dt><span class="term"><code class="constant">GL_PACK_SKIP_ROWS</code></span></dt><dd><p>
 777               </p><p>
 778                         <em class="parameter"><code>params</code></em> returns one value,
 779                         the number of rows of pixel locations skipped before the first pixel is written
 780                         into memory. The initial value is 0.
 781                         See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>.
 782                     </p></dd><dt><span class="term"><code class="constant">GL_PACK_SWAP_BYTES</code></span></dt><dd><p>
 783               </p><p>
 784                         <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether the bytes of
 785                         two-byte and four-byte pixel indices and components are swapped before being
 786                         written to memory. The initial value is <code class="constant">GL_FALSE</code>.
 787                         See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>.
 788                     </p></dd><dt><span class="term"><code class="constant">GL_PIXEL_PACK_BUFFER_BINDING</code></span></dt><dd><p>
 789               </p><p>
 790                         <em class="parameter"><code>params</code></em> returns a single value, the name of the buffer object
 791                         currently bound to the target <code class="constant">GL_PIXEL_PACK_BUFFER</code>. If no buffer object
 792                         is bound to this target, 0 is returned.  The initial value is 0.
 793                         See <a href="glBindBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glBindBuffer</span></span></a>.
 794                     </p></dd><dt><span class="term"><code class="constant">GL_PIXEL_UNPACK_BUFFER_BINDING</code></span></dt><dd><p>
 795               </p><p>
 796                         <em class="parameter"><code>params</code></em> returns a single value, the name of the buffer object
 797                         currently bound to the target <code class="constant">GL_PIXEL_UNPACK_BUFFER</code>. If no buffer object
 798                         is bound to this target, 0 is returned.  The initial value is 0.
 799                         See <a href="glBindBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glBindBuffer</span></span></a>.
 800                     </p></dd><dt><span class="term"><code class="constant">GL_POINT_FADE_THRESHOLD_SIZE</code></span></dt><dd><p>
 801               </p><p>
 802                         <em class="parameter"><code>params</code></em> returns one value,
 803                         the point size threshold for determining the point size.
 804                         See <a href="glPointParameter.xml"><span class="citerefentry"><span class="refentrytitle">glPointParameter</span></span></a>.
 805                     </p></dd><dt><span class="term"><code class="constant">GL_PRIMITIVE_RESTART_INDEX</code></span></dt><dd><p>
 806               </p><p>
 807                         <em class="parameter"><code>params</code></em> returns one value,
 808                         the current primitive restart index. The initial value is 0.
 809                         See <a href="glPrimitiveRestartIndex.xml"><span class="citerefentry"><span class="refentrytitle">glPrimitiveRestartIndex</span></span></a>.
 810                     </p></dd><dt><span class="term"><code class="constant">GL_PROGRAM_BINARY_FORMATS</code></span></dt><dd><p>
 811               </p><p>
 812                         <em class="parameter"><code>params</code></em> an array of <code class="constant">GL_NUM_PROGRAM_BINARY_FORMATS</code> values,
 813                         indicating the proram binary formats supported by the implementation.
 814                     </p></dd><dt><span class="term"><code class="constant">GL_PROGRAM_PIPELINE_BINDING</code></span></dt><dd><p>
 815               </p><p>
 816                         <em class="parameter"><code>params</code></em> a single value, the name of the currently bound program pipeline
 817                         object, or zero if no program pipeline object is bound.
 818                         See <a href="glBindProgramPipeline.xml"><span class="citerefentry"><span class="refentrytitle">glBindProgramPipeline</span></span></a>.
 819                     </p></dd><dt><span class="term"><code class="constant">GL_PROVOKING_VERTEX</code></span></dt><dd><p>
 820               </p><p>
 821                         <em class="parameter"><code>params</code></em> returns one value,
 822                         the currently selected provoking vertex convention. The initial value is <code class="constant">GL_LAST_VERTEX_CONVENTION</code>.
 823                         See <a href="glProvokingVertex.xml"><span class="citerefentry"><span class="refentrytitle">glProvokingVertex</span></span></a>.
 824                     </p></dd><dt><span class="term"><code class="constant">GL_POINT_SIZE</code></span></dt><dd><p>
 825               </p><p>
 826                         <em class="parameter"><code>params</code></em> returns one value,
 827                         the point size as specified by <a href="glPointSize.xml"><span class="citerefentry"><span class="refentrytitle">glPointSize</span></span></a>.
 828                         The initial value is 1.
 829                     </p></dd><dt><span class="term"><code class="constant">GL_POINT_SIZE_GRANULARITY</code></span></dt><dd><p>
 830               </p><p>
 831                         <em class="parameter"><code>params</code></em> returns one value,
 832                         the size difference between adjacent supported sizes for antialiased points.
 833                         See <a href="glPointSize.xml"><span class="citerefentry"><span class="refentrytitle">glPointSize</span></span></a>.
 834                     </p></dd><dt><span class="term"><code class="constant">GL_POINT_SIZE_RANGE</code></span></dt><dd><p>
 835               </p><p>
 836                         <em class="parameter"><code>params</code></em> returns two values:
 837                         the smallest and largest supported sizes for antialiased
 838                         points. The smallest size must be at most 1, and the largest size must
 839                         be at least 1.
 840                         See <a href="glPointSize.xml"><span class="citerefentry"><span class="refentrytitle">glPointSize</span></span></a>.
 841                     </p></dd><dt><span class="term"><code class="constant">GL_POLYGON_OFFSET_FACTOR</code></span></dt><dd><p>
 842               </p><p>
 843                         <em class="parameter"><code>params</code></em> returns one value,
 844                         the scaling factor used to determine the variable offset that is added
 845                         to the depth value of each fragment generated when a polygon is
 846                         rasterized. The initial value is 0.
 847                         See <a href="glPolygonOffset.xml"><span class="citerefentry"><span class="refentrytitle">glPolygonOffset</span></span></a>.
 848                     </p></dd><dt><span class="term"><code class="constant">GL_POLYGON_OFFSET_UNITS</code></span></dt><dd><p>
 849               </p><p>
 850                         <em class="parameter"><code>params</code></em> returns one value.
 851                         This value is multiplied by an implementation-specific value and then
 852                         added to the depth value of each fragment
 853                         generated when a polygon is rasterized. The initial value is 0.
 854                         See <a href="glPolygonOffset.xml"><span class="citerefentry"><span class="refentrytitle">glPolygonOffset</span></span></a>.
 855                     </p></dd><dt><span class="term"><code class="constant">GL_POLYGON_OFFSET_FILL</code></span></dt><dd><p>
 856               </p><p>
 857                         <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether polygon offset
 858                         is enabled for polygons in fill mode. The initial value is <code class="constant">GL_FALSE</code>.
 859                         See <a href="glPolygonOffset.xml"><span class="citerefentry"><span class="refentrytitle">glPolygonOffset</span></span></a>.
 860                     </p></dd><dt><span class="term"><code class="constant">GL_POLYGON_OFFSET_LINE</code></span></dt><dd><p>
 861               </p><p>
 862                         <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether polygon offset
 863                         is enabled for polygons in line mode. The initial value is <code class="constant">GL_FALSE</code>.
 864                         See <a href="glPolygonOffset.xml"><span class="citerefentry"><span class="refentrytitle">glPolygonOffset</span></span></a>.
 865                     </p></dd><dt><span class="term"><code class="constant">GL_POLYGON_OFFSET_POINT</code></span></dt><dd><p>
 866               </p><p>
 867                         <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether polygon offset
 868                         is enabled for polygons in point mode. The initial value is <code class="constant">GL_FALSE</code>.
 869                         See <a href="glPolygonOffset.xml"><span class="citerefentry"><span class="refentrytitle">glPolygonOffset</span></span></a>.
 870                     </p></dd><dt><span class="term"><code class="constant">GL_POLYGON_SMOOTH</code></span></dt><dd><p>
 871               </p><p>
 872                         <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether antialiasing of
 873                         polygons is enabled. The initial value is <code class="constant">GL_FALSE</code>.
 874                         See <a href="glPolygonMode.xml"><span class="citerefentry"><span class="refentrytitle">glPolygonMode</span></span></a>.
 875                     </p></dd><dt><span class="term"><code class="constant">GL_POLYGON_SMOOTH_HINT</code></span></dt><dd><p>
 876               </p><p>
 877                         <em class="parameter"><code>params</code></em> returns one value,
 878                         a symbolic constant indicating the mode of the polygon antialiasing
 879                         hint. The initial value is <code class="constant">GL_DONT_CARE</code>.
 880                         See <a href="glHint.xml"><span class="citerefentry"><span class="refentrytitle">glHint</span></span></a>.
 881                     </p></dd><dt><span class="term"><code class="constant">GL_READ_BUFFER</code></span></dt><dd><p>
 882               </p><p>
 883                         <em class="parameter"><code>params</code></em> returns one value,
 884                         a symbolic constant indicating which color buffer is selected for
 885                         reading. The initial value is <code class="constant">GL_BACK</code> if there is a back buffer,
 886                         otherwise it is <code class="constant">GL_FRONT</code>.
 887                         See
 888                         <a href="glReadPixels.xml"><span class="citerefentry"><span class="refentrytitle">glReadPixels</span></span></a>.
 889                     </p></dd><dt><span class="term"><code class="constant">GL_RENDERBUFFER_BINDING</code></span></dt><dd><p>
 890               </p><p>
 891                         <em class="parameter"><code>params</code></em> returns a single value, the name of the renderbuffer object
 892                         currently bound to the target <code class="constant">GL_RENDERBUFFER</code>. If no renderbuffer object
 893                         is bound to this target, 0 is returned.  The initial value is 0.
 894                         See <a href="glBindRenderbuffer.xml"><span class="citerefentry"><span class="refentrytitle">glBindRenderbuffer</span></span></a>.
 895                     </p></dd><dt><span class="term"><code class="constant">GL_SAMPLE_BUFFERS</code></span></dt><dd><p>
 896               </p><p>
 897                         <em class="parameter"><code>params</code></em> returns a single integer value indicating the number of sample buffers
 898                         associated with the framebuffer.
 899                         See <a href="glSampleCoverage.xml"><span class="citerefentry"><span class="refentrytitle">glSampleCoverage</span></span></a>.
 900                     </p></dd><dt><span class="term"><code class="constant">GL_SAMPLE_COVERAGE_VALUE</code></span></dt><dd><p>
 901               </p><p>
 902                         <em class="parameter"><code>params</code></em> returns a single positive floating-point value indicating the
 903                         current sample coverage value.
 904                         See <a href="glSampleCoverage.xml"><span class="citerefentry"><span class="refentrytitle">glSampleCoverage</span></span></a>.
 905                     </p></dd><dt><span class="term"><code class="constant">GL_SAMPLE_COVERAGE_INVERT</code></span></dt><dd><p>
 906               </p><p>
 907                         <em class="parameter"><code>params</code></em> returns a single boolean value indicating if the temporary
 908                         coverage value should be inverted.
 909                         See <a href="glSampleCoverage.xml"><span class="citerefentry"><span class="refentrytitle">glSampleCoverage</span></span></a>.
 910                     </p></dd><dt><span class="term"><code class="constant">GL_SAMPLER_BINDING</code></span></dt><dd><p>
 911               </p><p>
 912                         <em class="parameter"><code>params</code></em> returns a single value, the name of the sampler object
 913                         currently bound to the active texture unit.  The initial value is 0.
 914                         See <a href="glBindSampler.xml"><span class="citerefentry"><span class="refentrytitle">glBindSampler</span></span></a>.
 915                     </p></dd><dt><span class="term"><code class="constant">GL_SAMPLES</code></span></dt><dd><p>
 916               </p><p>
 917                         <em class="parameter"><code>params</code></em> returns a single integer value indicating the coverage mask size.
 918                         See <a href="glSampleCoverage.xml"><span class="citerefentry"><span class="refentrytitle">glSampleCoverage</span></span></a>.
 919                     </p></dd><dt><span class="term"><code class="constant">GL_SCISSOR_BOX</code></span></dt><dd><p>
 920               </p><p>
 921                         <em class="parameter"><code>params</code></em> returns four values:
 922                         the
 923                         <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">x</mml:mi></mml:math>
 924                         and
 925                         <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">y</mml:mi></mml:math>
 926                         window coordinates of the scissor box,
 927                         followed by its width and height.
 928                         Initially the
 929                         <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">x</mml:mi></mml:math>
 930                         and
 931                         <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">y</mml:mi></mml:math>
 932                         window coordinates are both 0 and the
 933                         width and height are set to the size of the window.
 934                         See <a href="glScissor.xml"><span class="citerefentry"><span class="refentrytitle">glScissor</span></span></a>.
 935                     </p></dd><dt><span class="term"><code class="constant">GL_SCISSOR_TEST</code></span></dt><dd><p>
 936               </p><p>
 937                         <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether scissoring is
 938                         enabled. The initial value is <code class="constant">GL_FALSE</code>.
 939                         See <a href="glScissor.xml"><span class="citerefentry"><span class="refentrytitle">glScissor</span></span></a>.
 940                     </p></dd><dt><span class="term"><code class="constant">GL_SHADER_COMPILER</code></span></dt><dd><p>
 941                 </p><p>
 942                         <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether an online shader
 943                         compiler is present in the implementation. All desktop OpenGL implementations must support
 944                         online shader compilations, and therefore the value of <code class="constant">GL_SHADER_COMPILER</code>
 945                         will always be <code class="constant">GL_TRUE</code>.
 946                     </p></dd><dt><span class="term"><code class="constant">GL_SHADER_STORAGE_BUFFER_BINDING</code></span></dt><dd><p>
 947                 </p><p>
 948                         When used with non-indexed variants of <code class="function">glGet</code> (such as <code class="function">glGetIntegerv</code>),
 949                         <em class="parameter"><code>params</code></em> returns a single value, the name of the buffer object
 950                         currently bound to the target <code class="constant">GL_SHADER_STORAGE_BUFFER</code>. If no buffer object
 951                         is bound to this target, 0 is returned.
 952                         When used with indexed variants of <code class="function">glGet</code> (such as <code class="function">glGetIntegeri_v</code>),
 953                         <em class="parameter"><code>params</code></em> returns a single value, the name of the buffer object
 954                         bound to the indexed shader storage buffer binding points. The initial value is 0 for all targets.
 955                         See <a href="glBindBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glBindBuffer</span></span></a>, <a href="glBindBufferBase.xml"><span class="citerefentry"><span class="refentrytitle">glBindBufferBase</span></span></a>, and
 956                         <a href="glBindBufferRange.xml"><span class="citerefentry"><span class="refentrytitle">glBindBufferRange</span></span></a>.
 957                     </p></dd><dt><span class="term"><code class="constant">GL_SHADER_STORAGE_BUFFER_OFFSET_ALIGNMENT</code></span></dt><dd><p>
 958               </p><p>
 959                         <em class="parameter"><code>params</code></em> returns a single value, the minimum required alignment
 960                         for shader storage buffer sizes and offset.  The initial value is 1.
 961                         See <a href="glShaderStorateBlockBinding.xml"><span class="citerefentry"><span class="refentrytitle">glShaderStorateBlockBinding</span></span></a>.
 962                     </p></dd><dt><span class="term"><code class="constant">GL_SHADER_STORAGE_BUFFER_START</code></span></dt><dd><p>
 963                 </p><p>
 964                         When used with indexed variants of <code class="function">glGet</code> (such as <code class="function">glGetInteger64i_v</code>),
 965                         <em class="parameter"><code>params</code></em> returns a single value, the start offset of the binding range for each
 966                         indexed shader storage buffer binding. The initial value is 0 for all bindings.
 967                         See <a href="glBindBufferRange.xml"><span class="citerefentry"><span class="refentrytitle">glBindBufferRange</span></span></a>.
 968                     </p></dd><dt><span class="term"><code class="constant">GL_SHADER_STORAGE_BUFFER_SIZE</code></span></dt><dd><p>
 969                 </p><p>
 970                         When used with indexed variants of <code class="function">glGet</code> (such as <code class="function">glGetInteger64i_v</code>),
 971                         <em class="parameter"><code>params</code></em> returns a single value, the size of the binding range for each
 972                         indexed shader storage buffer binding. The initial value is 0 for all bindings.
 973                         See <a href="glBindBufferRange.xml"><span class="citerefentry"><span class="refentrytitle">glBindBufferRange</span></span></a>.
 974                     </p></dd><dt><span class="term"><code class="constant">GL_SMOOTH_LINE_WIDTH_RANGE</code></span></dt><dd><p>
 975               </p><p>
 976                         <em class="parameter"><code>params</code></em> returns a pair of values indicating the range of
 977                         widths supported for smooth (antialiased) lines. See <a href="glLineWidth.xml"><span class="citerefentry"><span class="refentrytitle">glLineWidth</span></span></a>.
 978                     </p></dd><dt><span class="term"><code class="constant">GL_SMOOTH_LINE_WIDTH_GRANULARITY</code></span></dt><dd><p>
 979               </p><p>
 980                         <em class="parameter"><code>params</code></em> returns a single value indicating the level of
 981                         quantization applied to smooth line width parameters.
 982                     </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_BACK_FAIL</code></span></dt><dd><p>
 983               </p><p>
 984                         <em class="parameter"><code>params</code></em> returns one value,
 985                         a symbolic constant indicating what action is taken for back-facing polygons when the stencil
 986                         test fails. The initial value is <code class="constant">GL_KEEP</code>.
 987                         See <a href="glStencilOpSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilOpSeparate</span></span></a>.
 988                     </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_BACK_FUNC</code></span></dt><dd><p>
 989               </p><p>
 990                         <em class="parameter"><code>params</code></em> returns one value,
 991                         a symbolic constant indicating what function is used for back-facing polygons to compare the
 992                         stencil reference value with the stencil buffer value. The initial value
 993                         is <code class="constant">GL_ALWAYS</code>.
 994                         See <a href="glStencilFuncSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilFuncSeparate</span></span></a>.
 995                     </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_BACK_PASS_DEPTH_FAIL</code></span></dt><dd><p>
 996               </p><p>
 997                         <em class="parameter"><code>params</code></em> returns one value,
 998                         a symbolic constant indicating what action is taken for back-facing polygons when the stencil
 999                         test passes,
1000                         but the depth test fails. The initial value is <code class="constant">GL_KEEP</code>.
1001                         See <a href="glStencilOpSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilOpSeparate</span></span></a>.
1002                     </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_BACK_PASS_DEPTH_PASS</code></span></dt><dd><p>
1003               </p><p>
1004                         <em class="parameter"><code>params</code></em> returns one value,
1005                         a symbolic constant indicating what action is taken for back-facing polygons when the stencil
1006                         test passes and the depth test passes. The initial value is <code class="constant">GL_KEEP</code>.
1007                         See <a href="glStencilOpSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilOpSeparate</span></span></a>.
1008                     </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_BACK_REF</code></span></dt><dd><p>
1009               </p><p>
1010                         <em class="parameter"><code>params</code></em> returns one value,
1011                         the reference value that is compared with the contents of the stencil
1012                         buffer for back-facing polygons. The initial value is 0.
1013                         See <a href="glStencilFuncSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilFuncSeparate</span></span></a>.
1014                     </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_BACK_VALUE_MASK</code></span></dt><dd><p>
1015               </p><p>
1016                         <em class="parameter"><code>params</code></em> returns one value,
1017                         the mask that is used for back-facing polygons to mask both the stencil reference value and the
1018                         stencil buffer value before they are compared. The initial value is all 1's.
1019                         See <a href="glStencilFuncSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilFuncSeparate</span></span></a>.
1020                     </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_BACK_WRITEMASK</code></span></dt><dd><p>
1021               </p><p>
1022                         <em class="parameter"><code>params</code></em> returns one value,
1023                         the mask that controls writing of the stencil bitplanes for back-facing polygons. The initial value
1024                         is all 1's.
1025                         See <a href="glStencilMaskSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilMaskSeparate</span></span></a>.
1026                     </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_CLEAR_VALUE</code></span></dt><dd><p>
1027               </p><p>
1028                         <em class="parameter"><code>params</code></em> returns one value,
1029                         the index to which the stencil bitplanes are cleared. The initial value is
1030                         0.
1031                         See <a href="glClearStencil.xml"><span class="citerefentry"><span class="refentrytitle">glClearStencil</span></span></a>.
1032                     </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_FAIL</code></span></dt><dd><p>
1033               </p><p>
1034                         <em class="parameter"><code>params</code></em> returns one value,
1035                         a symbolic constant indicating what action is taken when the stencil
1036                         test fails. The initial value is <code class="constant">GL_KEEP</code>.
1037                         See <a href="glStencilOp.xml"><span class="citerefentry"><span class="refentrytitle">glStencilOp</span></span></a>.
1038                         This stencil state only affects non-polygons
1039                         and front-facing polygons.  Back-facing polygons use separate stencil state.
1040                         See <a href="glStencilOpSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilOpSeparate</span></span></a>.
1041                     </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_FUNC</code></span></dt><dd><p>
1042               </p><p>
1043                         <em class="parameter"><code>params</code></em> returns one value,
1044                         a symbolic constant indicating what function is used to compare the
1045                         stencil reference value with the stencil buffer value. The initial value
1046                         is <code class="constant">GL_ALWAYS</code>.
1047                         See <a href="glStencilFunc.xml"><span class="citerefentry"><span class="refentrytitle">glStencilFunc</span></span></a>.
1048                         This stencil state only affects non-polygons
1049                         and front-facing polygons.  Back-facing polygons use separate stencil state.
1050                         See <a href="glStencilFuncSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilFuncSeparate</span></span></a>.
1051                     </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_PASS_DEPTH_FAIL</code></span></dt><dd><p>
1052               </p><p>
1053                         <em class="parameter"><code>params</code></em> returns one value,
1054                         a symbolic constant indicating what action is taken when the stencil
1055                         test passes,
1056                         but the depth test fails. The initial value is <code class="constant">GL_KEEP</code>.
1057                         See <a href="glStencilOp.xml"><span class="citerefentry"><span class="refentrytitle">glStencilOp</span></span></a>.
1058                         This stencil state only affects non-polygons
1059                         and front-facing polygons.  Back-facing polygons use separate stencil state.
1060                         See <a href="glStencilOpSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilOpSeparate</span></span></a>.
1061                     </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_PASS_DEPTH_PASS</code></span></dt><dd><p>
1062               </p><p>
1063                         <em class="parameter"><code>params</code></em> returns one value,
1064                         a symbolic constant indicating what action is taken when the stencil
1065                         test passes and the depth test passes. The initial value is <code class="constant">GL_KEEP</code>.
1066                         See <a href="glStencilOp.xml"><span class="citerefentry"><span class="refentrytitle">glStencilOp</span></span></a>.
1067                         This stencil state only affects non-polygons
1068                         and front-facing polygons.  Back-facing polygons use separate stencil state.
1069                         See <a href="glStencilOpSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilOpSeparate</span></span></a>.
1070                     </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_REF</code></span></dt><dd><p>
1071               </p><p>
1072                         <em class="parameter"><code>params</code></em> returns one value,
1073                         the reference value that is compared with the contents of the stencil
1074                         buffer. The initial value is 0.
1075                         See <a href="glStencilFunc.xml"><span class="citerefentry"><span class="refentrytitle">glStencilFunc</span></span></a>.
1076                         This stencil state only affects non-polygons
1077                         and front-facing polygons.  Back-facing polygons use separate stencil state.
1078                         See <a href="glStencilFuncSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilFuncSeparate</span></span></a>.
1079                     </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_TEST</code></span></dt><dd><p>
1080               </p><p>
1081                         <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether stencil testing
1082                         of fragments is enabled. The initial value is <code class="constant">GL_FALSE</code>.
1083                         See <a href="glStencilFunc.xml"><span class="citerefentry"><span class="refentrytitle">glStencilFunc</span></span></a> and <a href="glStencilOp.xml"><span class="citerefentry"><span class="refentrytitle">glStencilOp</span></span></a>.
1084                     </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_VALUE_MASK</code></span></dt><dd><p>
1085               </p><p>
1086                         <em class="parameter"><code>params</code></em> returns one value,
1087                         the mask that is used to mask both the stencil reference value and the
1088                         stencil buffer value before they are compared. The initial value is all 1's.
1089                         See <a href="glStencilFunc.xml"><span class="citerefentry"><span class="refentrytitle">glStencilFunc</span></span></a>.
1090                         This stencil state only affects non-polygons
1091                         and front-facing polygons.  Back-facing polygons use separate stencil state.
1092                         See <a href="glStencilFuncSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilFuncSeparate</span></span></a>.
1093                     </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_WRITEMASK</code></span></dt><dd><p>
1094               </p><p>
1095                         <em class="parameter"><code>params</code></em> returns one value,
1096                         the mask that controls writing of the stencil bitplanes. The initial value
1097                         is all 1's.
1098                         See <a href="glStencilMask.xml"><span class="citerefentry"><span class="refentrytitle">glStencilMask</span></span></a>.
1099                         This stencil state only affects non-polygons
1100                         and front-facing polygons.  Back-facing polygons use separate stencil state.
1101                         See <a href="glStencilMaskSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilMaskSeparate</span></span></a>.
1102                     </p></dd><dt><span class="term"><code class="constant">GL_STEREO</code></span></dt><dd><p>
1103               </p><p>
1104                         <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether stereo buffers
1105                         (left and right) are supported.
1106                     </p></dd><dt><span class="term"><code class="constant">GL_SUBPIXEL_BITS</code></span></dt><dd><p>
1107               </p><p>
1108                         <em class="parameter"><code>params</code></em> returns one value,
1109                         an estimate of the number of bits of subpixel resolution that are used to
1110                         position rasterized geometry in window coordinates. The value must be at least 4.
1111                     </p></dd><dt><span class="term"><code class="constant">GL_TEXTURE_BINDING_1D</code></span></dt><dd><p>
1112               </p><p>
1113                         <em class="parameter"><code>params</code></em> returns a single value, the name of the texture
1114                         currently bound to the target <code class="constant">GL_TEXTURE_1D</code>. The initial value is 0.
1115                         See <a href="glBindTexture.xml"><span class="citerefentry"><span class="refentrytitle">glBindTexture</span></span></a>.
1116                     </p></dd><dt><span class="term"><code class="constant">GL_TEXTURE_BINDING_1D_ARRAY</code></span></dt><dd><p>
1117               </p><p>
1118                         <em class="parameter"><code>params</code></em> returns a single value, the name of the texture
1119                         currently bound to the target <code class="constant">GL_TEXTURE_1D_ARRAY</code>. The initial value is 0.
1120                         See <a href="glBindTexture.xml"><span class="citerefentry"><span class="refentrytitle">glBindTexture</span></span></a>.
1121                     </p></dd><dt><span class="term"><code class="constant">GL_TEXTURE_BINDING_2D</code></span></dt><dd><p>
1122               </p><p>
1123                         <em class="parameter"><code>params</code></em> returns a single value, the name of the texture
1124                         currently bound to the target <code class="constant">GL_TEXTURE_2D</code>. The initial value is 0.
1125                         See <a href="glBindTexture.xml"><span class="citerefentry"><span class="refentrytitle">glBindTexture</span></span></a>.
1126                     </p></dd><dt><span class="term"><code class="constant">GL_TEXTURE_BINDING_2D_ARRAY</code></span></dt><dd><p>
1127               </p><p>
1128                         <em class="parameter"><code>params</code></em> returns a single value, the name of the texture
1129                         currently bound to the target <code class="constant">GL_TEXTURE_2D_ARRAY</code>. The initial value is 0.
1130                         See <a href="glBindTexture.xml"><span class="citerefentry"><span class="refentrytitle">glBindTexture</span></span></a>.
1131                     </p></dd><dt><span class="term"><code class="constant">GL_TEXTURE_BINDING_2D_MULTISAMPLE</code></span></dt><dd><p>
1132               </p><p>
1133                         <em class="parameter"><code>params</code></em> returns a single value, the name of the texture
1134                         currently bound to the target <code class="constant">GL_TEXTURE_2D_MULTISAMPLE</code>. The initial value is 0.
1135                         See <a href="glBindTexture.xml"><span class="citerefentry"><span class="refentrytitle">glBindTexture</span></span></a>.
1136                     </p></dd><dt><span class="term"><code class="constant">GL_TEXTURE_BINDING_2D_MULTISAMPLE_ARRAY</code></span></dt><dd><p>
1137               </p><p>
1138                         <em class="parameter"><code>params</code></em> returns a single value, the name of the texture
1139                         currently bound to the target <code class="constant">GL_TEXTURE_2D_MULTISAMPLE_ARRAY</code>. The initial value is 0.
1140                         See <a href="glBindTexture.xml"><span class="citerefentry"><span class="refentrytitle">glBindTexture</span></span></a>.
1141                     </p></dd><dt><span class="term"><code class="constant">GL_TEXTURE_BINDING_3D</code></span></dt><dd><p>
1142               </p><p>
1143                         <em class="parameter"><code>params</code></em> returns a single value, the name of the texture
1144                         currently bound to the target <code class="constant">GL_TEXTURE_3D</code>. The initial value is 0.
1145                         See <a href="glBindTexture.xml"><span class="citerefentry"><span class="refentrytitle">glBindTexture</span></span></a>.
1146                     </p></dd><dt><span class="term"><code class="constant">GL_TEXTURE_BINDING_BUFFER</code></span></dt><dd><p>
1147               </p><p>
1148                         <em class="parameter"><code>params</code></em> returns a single value, the name of the texture
1149                         currently bound to the target <code class="constant">GL_TEXTURE_BUFFER</code>. The initial value is 0.
1150                         See <a href="glBindTexture.xml"><span class="citerefentry"><span class="refentrytitle">glBindTexture</span></span></a>.
1151                     </p></dd><dt><span class="term"><code class="constant">GL_TEXTURE_BINDING_CUBE_MAP</code></span></dt><dd><p>
1152               </p><p>
1153                         <em class="parameter"><code>params</code></em> returns a single value, the name of the texture
1154                         currently bound to the target <code class="constant">GL_TEXTURE_CUBE_MAP</code>. The initial value is 0.
1155                         See <a href="glBindTexture.xml"><span class="citerefentry"><span class="refentrytitle">glBindTexture</span></span></a>.
1156                     </p></dd><dt><span class="term"><code class="constant">GL_TEXTURE_BINDING_RECTANGLE</code></span></dt><dd><p>
1157               </p><p>
1158                         <em class="parameter"><code>params</code></em> returns a single value, the name of the texture
1159                         currently bound to the target <code class="constant">GL_TEXTURE_RECTANGLE</code>. The initial value is 0.
1160                         See <a href="glBindTexture.xml"><span class="citerefentry"><span class="refentrytitle">glBindTexture</span></span></a>.
1161                     </p></dd><dt><span class="term"><code class="constant">GL_TEXTURE_COMPRESSION_HINT</code></span></dt><dd><p>
1162               </p><p>
1163                         <em class="parameter"><code>params</code></em> returns a single value indicating the mode of the texture
1164                         compression hint.  The initial value is <code class="constant">GL_DONT_CARE</code>.
1165                     </p></dd><dt><span class="term"><code class="constant">GL_TEXTURE_BUFFER_BINDING</code></span></dt><dd><p>
1166               </p><p>
1167                         <em class="parameter"><code>params</code></em> returns a single value, the name of the buffer object
1168                         currently bound to the <code class="constant">GL_TEXTURE_BUFFER</code> buffer binding point. The initial value is 0.
1169                         See <a href="glBindBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glBindBuffer</span></span></a>.
1170                     </p></dd><dt><span class="term"><code class="constant">GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT</code></span></dt><dd><p>
1171               </p><p>
1172                         <em class="parameter"><code>params</code></em> returns a single value, the minimum required alignment
1173                         for texture buffer sizes and offset.  The initial value is 1.
1174                         See <a href="glUniformBlockBinding.xml"><span class="citerefentry"><span class="refentrytitle">glUniformBlockBinding</span></span></a>.
1175                     </p></dd><dt><span class="term"><code class="constant">GL_TIMESTAMP</code></span></dt><dd><p>
1176               </p><p>
1177                         <em class="parameter"><code>params</code></em> returns a single value, the 64-bit value of the current
1178                         GL time.
1179                         See <a href="glQueryCounter.xml"><span class="citerefentry"><span class="refentrytitle">glQueryCounter</span></span></a>.
1180                     </p></dd><dt><span class="term"><code class="constant">GL_TRANSFORM_FEEDBACK_BUFFER_BINDING</code></span></dt><dd><p>
1181               </p><p>
1182                         When used with non-indexed variants of <code class="function">glGet</code> (such as <code class="function">glGetIntegerv</code>),
1183                         <em class="parameter"><code>params</code></em> returns a single value, the name of the buffer object
1184                         currently bound to the target <code class="constant">GL_TRANSFORM_FEEDBACK_BUFFER</code>. If no buffer object
1185                         is bound to this target, 0 is returned.
1186                         When used with indexed variants of <code class="function">glGet</code> (such as <code class="function">glGetIntegeri_v</code>),
1187                         <em class="parameter"><code>params</code></em> returns a single value, the name of the buffer object
1188                         bound to the indexed transform feedback attribute stream. The initial value is 0 for all targets.
1189                         See <a href="glBindBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glBindBuffer</span></span></a>, <a href="glBindBufferBase.xml"><span class="citerefentry"><span class="refentrytitle">glBindBufferBase</span></span></a>, and
1190                         <a href="glBindBufferRange.xml"><span class="citerefentry"><span class="refentrytitle">glBindBufferRange</span></span></a>.
1191                     </p></dd><dt><span class="term"><code class="constant">GL_TRANSFORM_FEEDBACK_BUFFER_START</code></span></dt><dd><p>
1192               </p><p>
1193                         When used with indexed variants of <code class="function">glGet</code> (such as <code class="function">glGetInteger64i_v</code>),
1194                         <em class="parameter"><code>params</code></em> returns a single value, the start offset of the binding range for each
1195                         transform feedback attribute stream. The initial value is 0 for all streams.
1196                         See <a href="glBindBufferRange.xml"><span class="citerefentry"><span class="refentrytitle">glBindBufferRange</span></span></a>.
1197                     </p></dd><dt><span class="term"><code class="constant">GL_TRANSFORM_FEEDBACK_BUFFER_SIZE</code></span></dt><dd><p>
1198               </p><p>
1199                         When used with indexed variants of <code class="function">glGet</code> (such as <code class="function">glGetInteger64i_v</code>),
1200                         <em class="parameter"><code>params</code></em> returns a single value, the size of the binding range for each
1201                         transform feedback attribute stream. The initial value is 0 for all streams.
1202                         See <a href="glBindBufferRange.xml"><span class="citerefentry"><span class="refentrytitle">glBindBufferRange</span></span></a>.
1203                     </p></dd><dt><span class="term"><code class="constant">GL_UNIFORM_BUFFER_BINDING</code></span></dt><dd><p>
1204               </p><p>
1205                         When used with non-indexed variants of <code class="function">glGet</code> (such as <code class="function">glGetIntegerv</code>),
1206                         <em class="parameter"><code>params</code></em> returns a single value, the name of the buffer object
1207                         currently bound to the target <code class="constant">GL_UNIFORM_BUFFER</code>. If no buffer object
1208                         is bound to this target, 0 is returned.
1209                         When used with indexed variants of <code class="function">glGet</code> (such as <code class="function">glGetIntegeri_v</code>),
1210                         <em class="parameter"><code>params</code></em> returns a single value, the name of the buffer object
1211                         bound to the indexed uniform buffer binding point. The initial value is 0 for all targets.
1212                         See <a href="glBindBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glBindBuffer</span></span></a>, <a href="glBindBufferBase.xml"><span class="citerefentry"><span class="refentrytitle">glBindBufferBase</span></span></a>, and
1213                         <a href="glBindBufferRange.xml"><span class="citerefentry"><span class="refentrytitle">glBindBufferRange</span></span></a>.
1214                     </p></dd><dt><span class="term"><code class="constant">GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT</code></span></dt><dd><p>
1215               </p><p>
1216                         <em class="parameter"><code>params</code></em> returns a single value, the minimum required alignment
1217                         for uniform buffer sizes and offset.  The initial value is 1.
1218                         See <a href="glUniformBlockBinding.xml"><span class="citerefentry"><span class="refentrytitle">glUniformBlockBinding</span></span></a>.
1219                     </p></dd><dt><span class="term"><code class="constant">GL_UNIFORM_BUFFER_SIZE</code></span></dt><dd><p>
1220               </p><p>
1221                         When used with indexed variants of <code class="function">glGet</code> (such as <code class="function">glGetInteger64i_v</code>),
1222                         <em class="parameter"><code>params</code></em> returns a single value, the size of the binding range for each
1223                         indexed uniform buffer binding. The initial value is 0 for all bindings.
1224                         See <a href="glBindBufferRange.xml"><span class="citerefentry"><span class="refentrytitle">glBindBufferRange</span></span></a>.
1225                     </p></dd><dt><span class="term"><code class="constant">GL_UNIFORM_BUFFER_START</code></span></dt><dd><p>
1226               </p><p>
1227                         When used with indexed variants of <code class="function">glGet</code> (such as <code class="function">glGetInteger64i_v</code>),
1228                         <em class="parameter"><code>params</code></em> returns a single value, the start offset of the binding range for each
1229                         indexed uniform buffer binding. The initial value is 0 for all bindings.
1230                         See <a href="glBindBufferRange.xml"><span class="citerefentry"><span class="refentrytitle">glBindBufferRange</span></span></a>.
1231                     </p></dd><dt><span class="term"><code class="constant">GL_UNPACK_ALIGNMENT</code></span></dt><dd><p>
1232               </p><p>
1233                         <em class="parameter"><code>params</code></em> returns one value,
1234                         the byte alignment used for reading pixel data from memory. The initial
1235                         value is 4.
1236                         See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>.
1237                     </p></dd><dt><span class="term"><code class="constant">GL_UNPACK_IMAGE_HEIGHT</code></span></dt><dd><p>
1238               </p><p>
1239                         <em class="parameter"><code>params</code></em> returns one value,
1240                         the image height used for reading pixel data from memory.  The initial
1241                         is 0.
1242                         See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>.
1243                     </p></dd><dt><span class="term"><code class="constant">GL_UNPACK_LSB_FIRST</code></span></dt><dd><p>
1244               </p><p>
1245                         <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether single-bit
1246                         pixels being read from memory are read first from the least significant
1247                         bit of each unsigned byte. The initial value is <code class="constant">GL_FALSE</code>.
1248                         See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>.
1249                     </p></dd><dt><span class="term"><code class="constant">GL_UNPACK_ROW_LENGTH</code></span></dt><dd><p>
1250               </p><p>
1251                         <em class="parameter"><code>params</code></em> returns one value,
1252                         the row length used for reading pixel data from memory. The initial value
1253                         is 0.
1254                         See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>.
1255                     </p></dd><dt><span class="term"><code class="constant">GL_UNPACK_SKIP_IMAGES</code></span></dt><dd><p>
1256               </p><p>
1257                         <em class="parameter"><code>params</code></em> returns one value,
1258                         the number of pixel images skipped before the first pixel is read
1259                         from memory. The initial value is 0.
1260                         See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>.
1261                     </p></dd><dt><span class="term"><code class="constant">GL_UNPACK_SKIP_PIXELS</code></span></dt><dd><p>
1262               </p><p>
1263                         <em class="parameter"><code>params</code></em> returns one value,
1264                         the number of pixel locations skipped before the first pixel is read
1265                         from memory. The initial value is 0.
1266                         See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>.
1267                     </p></dd><dt><span class="term"><code class="constant">GL_UNPACK_SKIP_ROWS</code></span></dt><dd><p>
1268               </p><p>
1269                         <em class="parameter"><code>params</code></em> returns one value,
1270                         the number of rows of pixel locations skipped before the first pixel is read
1271                         from memory. The initial value is 0.
1272                         See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>.
1273                     </p></dd><dt><span class="term"><code class="constant">GL_UNPACK_SWAP_BYTES</code></span></dt><dd><p>
1274               </p><p>
1275                         <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether the bytes of
1276                         two-byte and four-byte pixel indices and components are swapped after being
1277                         read from memory. The initial value is <code class="constant">GL_FALSE</code>.
1278                         See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>.
1279                     </p></dd><dt><span class="term"><code class="constant">GL_VERTEX_PROGRAM_POINT_SIZE</code></span></dt><dd><p>
1280               </p><p>
1281                         <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether vertex
1282                         program point size mode is enabled. If enabled, and a vertex shader is active, then the
1283                         point size is taken from the shader built-in <code class="code">gl_PointSize</code>. If disabled,
1284                         and a vertex shader is active, then the point size is taken from the point state as specified
1285                         by <a href="glPointSize.xml"><span class="citerefentry"><span class="refentrytitle">glPointSize</span></span></a>.
1286                         The initial value is <code class="constant">GL_FALSE</code>.
1287                     </p></dd><dt><span class="term"><code class="constant">GL_VERTEX_BINDING_DIVISOR</code></span></dt><dd><p>
1288               </p><p>
1289                         Accepted by the indexed forms. <em class="parameter"><code>params</code></em> returns a single integer value representing the instance step
1290                         divisor of the first element in the bound buffer's data store for vertex attribute bound to <em class="parameter"><code>index</code></em>.
1291                     </p></dd><dt><span class="term"><code class="constant">GL_VERTEX_BINDING_OFFSET</code></span></dt><dd><p>
1292               </p><p>
1293                         Accepted by the indexed forms. <em class="parameter"><code>params</code></em> returns a single integer value representing the byte offset
1294                         of the first element in the bound buffer's data store for vertex attribute bound to <em class="parameter"><code>index</code></em>.
1295                     </p></dd><dt><span class="term"><code class="constant">GL_VERTEX_BINDING_STRIDE</code></span></dt><dd><p>
1296               </p><p>
1297                         Accepted by the indexed forms. <em class="parameter"><code>params</code></em> returns a single integer value representing the byte offset
1298                         between the start of each element in the bound buffer's data store for vertex attribute bound to <em class="parameter"><code>index</code></em>.
1299                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_VERTEX_ATTRIB_RELATIVE_OFFSET</code></span></dt><dd><p>
1300               </p><p>
1301                         <em class="parameter"><code>params</code></em> returns a single integer value containing the maximum offset that may be added to a vertex binding
1302                         offset.
1303                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_VERTEX_ATTRIB_BINDINGS</code></span></dt><dd><p>
1304               </p><p>
1305                         <em class="parameter"><code>params</code></em> returns a single integer value containing the maximum number of vertex buffers that may be bound.
1306                     </p></dd><dt><span class="term"><code class="constant">GL_VIEWPORT</code></span></dt><dd><p>
1307               </p><p>
1308                         When used with non-indexed variants of <code class="function">glGet</code> (such as <code class="function">glGetIntegerv</code>),
1309                         <em class="parameter"><code>params</code></em> returns four values:
1310                         the
1311                         <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">x</mml:mi></mml:math>
1312                         and
1313                         <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">y</mml:mi></mml:math>
1314                         window coordinates of the viewport, followed by its width and height.
1315                         Initially the
1316                         <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">x</mml:mi></mml:math>
1317                         and
1318                         <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">y</mml:mi></mml:math>
1319                         window coordinates are both set to 0,
1320                         and the width and height are set to the width and height of the window into
1321                         which the GL will do its rendering.
1322                         See <a href="glViewport.xml"><span class="citerefentry"><span class="refentrytitle">glViewport</span></span></a>.
1323
1324                         When used with indexed variants of <code class="function">glGet</code> (such as <code class="function">glGetIntegeri_v</code>),
1325                         <em class="parameter"><code>params</code></em> returns four values:
1326                         the
1327                         <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">x</mml:mi></mml:math>
1328                         and
1329                         <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">y</mml:mi></mml:math>
1330                         window coordinates of the indexed viewport, followed by its width and height.
1331                         Initially the
1332                         <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">x</mml:mi></mml:math>
1333                         and
1334                         <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">y</mml:mi></mml:math>
1335                         window coordinates are both set to 0,
1336                         and the width and height are set to the width and height of the window into
1337                         which the GL will do its rendering.
1338                         See <a href="glViewportIndexedf.xml"><span class="citerefentry"><span class="refentrytitle">glViewportIndexedf</span></span></a>.
1339                     </p></dd><dt><span class="term"><code class="constant">GL_VIEWPORT_BOUNDS_RANGE</code></span></dt><dd><p>
1340               </p><p>
1341                         <em class="parameter"><code>params</code></em> returns two values, the minimum and maximum viewport bounds range.
1342                         The minimum range should be at least [-32768, 32767].
1343                     </p></dd><dt><span class="term"><code class="constant">GL_VIEWPORT_INDEX_PROVOKING_VERTEX</code></span></dt><dd><p>
1344               </p><p>
1345                         <em class="parameter"><code>params</code></em> returns one value,
1346                         the implementation dependent specifc vertex of a primitive that is used to select the viewport index.
1347                         If the value returned is equivalent to <code class="constant">GL_PROVOKING_VERTEX</code>, then the vertex
1348                         selection follows the convention specified by
1349                         <a href="glProvokingVertex.xml"><span class="citerefentry"><span class="refentrytitle">glProvokingVertex</span></span></a>.
1350                         If the value returned is equivalent to <code class="constant">GL_FIRST_VERTEX_CONVENTION</code>, then the
1351                         selection is always taken from the first vertex in the primitive.
1352                         If the value returned is equivalent to <code class="constant">GL_LAST_VERTEX_CONVENTION</code>, then the
1353                         selection is always taken from the last vertex in the primitive.
1354                         If the value returned is equivalent to <code class="constant">GL_UNDEFINED_VERTEX</code>, then the
1355                         selection is not guaranteed to be taken from any specific vertex in the primitive.
1356                     </p></dd><dt><span class="term"><code class="constant">GL_VIEWPORT_SUBPIXEL_BITS</code></span></dt><dd><p>
1357               </p><p>
1358                         <em class="parameter"><code>params</code></em> returns a single value, the number of bits of sub-pixel precision which the GL
1359                         uses to interpret the floating point viewport bounds. The minimum value is 0.
1360                     </p></dd><dt><span class="term"><code class="constant">GL_MAX_ELEMENT_INDEX</code></span></dt><dd><p>
1361                     </p><p>
1362                             <em class="parameter"><code>params</code></em> returns a single value, the maximum index that may be specified during the
1363                             transfer of generic vertex attributes to the GL.
1364                         </p></dd></dl></div><p>
1365             Many of the boolean parameters can also be queried more easily using
1366             <a href="glIsEnabled.xml"><span class="citerefentry"><span class="refentrytitle">glIsEnabled</span></span></a>.
1367         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="notes"></a><h2>Notes</h2><p>
1368             The following parameters return the associated value for the active texture unit:
1369             <code class="constant">GL_TEXTURE_1D</code>, <code class="constant">GL_TEXTURE_BINDING_1D</code>,
1370             <code class="constant">GL_TEXTURE_2D</code>, <code class="constant">GL_TEXTURE_BINDING_2D</code>,
1371             <code class="constant">GL_TEXTURE_3D</code> and <code class="constant">GL_TEXTURE_BINDING_3D</code>.
1372         </p><p>
1373             <code class="constant">GL_MAX_VIEWPORTS</code>, <code class="constant">GL_VIEWPORT_SUBPIXEL_BITS</code>,
1374             <code class="constant">GL_VIEWPORT_BOUNDS_RANGE</code>, <code class="constant">GL_LAYER_PROVOKING_VERTEX</code>,
1375             and <code class="constant">GL_VIEWPORT_INDEX_PROVOKING_VERTEX</code>
1376             are available only if the GL version is 4.1 or greater.
1377         </p><p>
1378             <code class="constant">GL_MAX_VERTEX_ATOMIC_COUNTERS</code>,
1379             <code class="constant">GL_MAX_TESS_CONTROL_ATOMIC_COUNTERS</code>,
1380             <code class="constant">GL_MAX_TESS_EVALUATION_ATOMIC_COUNTERS</code>,
1381             <code class="constant">GL_MAX_GEOMETRY_ATOMIC_COUNTERS</code>,
1382             <code class="constant">GL_MAX_FRAMGENT_ATOMIC_COUNTERS</code>, and
1383             <code class="constant">GL_MIN_MAP_BUFFER_ALIGNMENT</code> are accepted by <em class="parameter"><code>pname</code></em>
1384             only if the GL version is 4.2 or greater.
1385         </p><p>
1386             <code class="constant">GL_MAX_ELEMENT_INDEX</code> is accepted by <em class="parameter"><code>pname</code></em> only
1387             if the GL version is 4.3 or greater.
1388         </p><p>
1389             <code class="constant">GL_MAX_COMPUTE_UNIFORM_BLOCKS</code>, <code class="constant">GL_MAX_COMPUTE_TEXTURE_IMAGE_UNITS</code>,
1390             <code class="constant">GL_MAX_COMPUTE_UNIFORM_COMPONENTS</code>, <code class="constant">GL_MAX_COMPUTE_ATOMIC_COUNTERS</code>,
1391             <code class="constant">GL_MAX_COMPUTE_ATOMIC_COUNTER_BUFFERS</code>, <code class="constant">GL_MAX_COMBINED_COMPUTE_UNIFORM_COMPONENTS</code>,
1392             <code class="constant">GL_MAX_COMPUTE_WORK_GROUP_INVOCATIONS</code>, <code class="constant">GL_MAX_COMPUTE_WORK_GROUP_COUNT</code>, and
1393             <code class="constant">GL_MAX_COMPUTE_WORK_GROUP_SIZE</code> and <code class="constant">GL_DISPATCH_INDIRECT_BUFFER_BINDING</code> are available only if the GL version
1394             is 4.3 or greater.
1395         </p><p>
1396             <code class="constant">GL_MAX_DEBUG_GROUP_STACK_DEPTH</code>, <code class="constant">GL_DEBUG_GROUP_STACK_DEPTH</code> and <code class="constant">GL_MAX_LABEL_LENGTH</code> are accepted only if
1397             the GL version is 4.3 or greater.
1398         </p><p>
1399             <code class="constant">GL_MAX_UNIFORM_LOCATIONS</code> is accepted only if the GL version is 4.3 or greater.
1400         </p><p>
1401             <code class="constant">GL_MAX_FRAMEBUFFER_WIDTH</code>, <code class="constant">GL_MAX_FRAMEBUFFER_HEIGHT</code>, <code class="constant">GL_MAX_FRAMEBUFFER_LAYERS</code>,
1402             and <code class="constant">GL_MAX_FRAMEBUFFER_SAMPLES</code> are available only if the GL version is 4.3 or greater.
1403         </p><p>
1404             <code class="constant">GL_MAX_VERTEX_SHADER_STORAGE_BLOCKS</code>, <code class="constant">GL_MAX_TESS_CONTROL_SHADER_STORAGE_BLOCKS</code>,
1405             <code class="constant">GL_MAX_TESS_EVALUATION_SHADER_STORAGE_BLOCKS</code>, <code class="constant">GL_MAX_GEOMETRY_SHADER_STORAGE_BLOCKS</code>,
1406             <code class="constant">GL_MAX_FRAGMENT_SHADER_STORAGE_BLOCKS</code>, and <code class="constant">GL_MAX_COMPUTE_SHADER_STORAGE_BLOCKS</code> are available
1407             only if the GL version is 4.3 or higher.
1408         </p><p>
1409             <code class="constant">GL_TEXTURE_BUFFER_OFFSET_ALIGNMENT</code> is available only if the GL version is 4.3 or greater.
1410         </p><p>
1411             <code class="constant">GL_VERTEX_BINDING_DIVISOR</code>, <code class="constant">GL_VERTEX_BINDING_OFFSET</code>, <code class="constant">GL_VERTEX_BINDING_STRIDE</code>,
1412             <code class="constant">GL_MAX_VERTEX_ATTRIB_RELATIVE_OFFSET</code> and <code class="constant">GL_MAX_VERTEX_ATTRIB_BINDINGS</code> are available only if
1413             the GL version is 4.3 or greater.
1414         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="errors"></a><h2>Errors</h2><p>
1415             <code class="constant">GL_INVALID_ENUM</code> is generated if <em class="parameter"><code>pname</code></em> is not an accepted value.
1416         </p><p>
1417             <code class="constant">GL_INVALID_VALUE</code> is generated on any of <code class="function">glGetBooleani_v</code>,
1418             <code class="function">glGetIntegeri_v</code>, or <code class="function">glGetInteger64i_v</code> if
1419             <em class="parameter"><code>index</code></em> is outside of the valid range for the indexed state <em class="parameter"><code>target</code></em>.
1420         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p>
1421             <a href="glGetActiveUniform.xml"><span class="citerefentry"><span class="refentrytitle">glGetActiveUniform</span></span></a>,
1422             <a href="glGetAttachedShaders.xml"><span class="citerefentry"><span class="refentrytitle">glGetAttachedShaders</span></span></a>,
1423             <a href="glGetAttribLocation.xml"><span class="citerefentry"><span class="refentrytitle">glGetAttribLocation</span></span></a>,
1424             <a href="glGetBufferParameter.xml"><span class="citerefentry"><span class="refentrytitle">glGetBufferParameter</span></span></a>,
1425             <a href="glGetBufferPointerv.xml"><span class="citerefentry"><span class="refentrytitle">glGetBufferPointerv</span></span></a>,
1426             <a href="glGetBufferSubData.xml"><span class="citerefentry"><span class="refentrytitle">glGetBufferSubData</span></span></a>,
1427             <a href="glGetCompressedTexImage.xml"><span class="citerefentry"><span class="refentrytitle">glGetCompressedTexImage</span></span></a>,
1428             <a href="glGetError.xml"><span class="citerefentry"><span class="refentrytitle">glGetError</span></span></a>,
1429             <a href="glGetProgram.xml"><span class="citerefentry"><span class="refentrytitle">glGetProgram</span></span></a>,
1430             <a href="glGetProgramInfoLog.xml"><span class="citerefentry"><span class="refentrytitle">glGetProgramInfoLog</span></span></a>,
1431             <a href="glGetQueryiv.xml"><span class="citerefentry"><span class="refentrytitle">glGetQueryiv</span></span></a>,
1432             <a href="glGetQueryObject.xml"><span class="citerefentry"><span class="refentrytitle">glGetQueryObject</span></span></a>,
1433             <a href="glGetShader.xml"><span class="citerefentry"><span class="refentrytitle">glGetShader</span></span></a>,
1434             <a href="glGetShaderInfoLog.xml"><span class="citerefentry"><span class="refentrytitle">glGetShaderInfoLog</span></span></a>,
1435             <a href="glGetShaderSource.xml"><span class="citerefentry"><span class="refentrytitle">glGetShaderSource</span></span></a>,
1436             <a href="glGetString.xml"><span class="citerefentry"><span class="refentrytitle">glGetString</span></span></a>,
1437             <a href="glGetTexImage.xml"><span class="citerefentry"><span class="refentrytitle">glGetTexImage</span></span></a>,
1438             <a href="glGetTexLevelParameter.xml"><span class="citerefentry"><span class="refentrytitle">glGetTexLevelParameter</span></span></a>,
1439             <a href="glGetTexParameter.xml"><span class="citerefentry"><span class="refentrytitle">glGetTexParameter</span></span></a>,
1440             <a href="glGetUniform.xml"><span class="citerefentry"><span class="refentrytitle">glGetUniform</span></span></a>,
1441             <a href="glGetUniformLocation.xml"><span class="citerefentry"><span class="refentrytitle">glGetUniformLocation</span></span></a>,
1442             <a href="glGetVertexAttrib.xml"><span class="citerefentry"><span class="refentrytitle">glGetVertexAttrib</span></span></a>,
1443             <a href="glGetVertexAttribPointerv.xml"><span class="citerefentry"><span class="refentrytitle">glGetVertexAttribPointerv</span></span></a>,
1444             <a href="glIsEnabled.xml"><span class="citerefentry"><span class="refentrytitle">glIsEnabled</span></span></a>
1445         </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="Copyright"></a><h2>Copyright</h2><p>
1446             Copyright <span class="trademark"></span>© 1991-2006 Silicon Graphics, Inc.
1447             Copyright <span class="trademark"></span>© 2010-2011 Khronos Group.
1448             This document is licensed under the SGI Free Software B License. For details, see
1449             <a href="http://oss.sgi.com/projects/FreeB/" target="_top">http://oss.sgi.com/projects/FreeB/</a>.
1450         </p></div></div></body></html>