HCoop / clinton / guile-figl.git / blame
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1 | <?xml version="1.0" encoding="UTF-8"?> |
| 2 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "xhtml1-transitional.dtd"> | |
| 3 | <!-- saved from url=(0013)about:internet --> | |
| 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 3.3 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">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_SMOOTH_LINE_WIDTH_RANGE</code></span></dt><dd><p> | |
| 55 | </p><p> | |
| 56 | <em class="parameter"><code>params</code></em> returns a pair of values indicating the range of | |
| 57 | widths supported for smooth (antialiased) lines. See <a href="glLineWidth.xml"><span class="citerefentry"><span class="refentrytitle">glLineWidth</span></span></a>. | |
| 58 | </p></dd><dt><span class="term"><code class="constant">GL_SMOOTH_LINE_WIDTH_GRANULARITY</code></span></dt><dd><p> | |
| 59 | </p><p> | |
| 60 | <em class="parameter"><code>params</code></em> returns a single value indicating the level of | |
| 61 | quantization applied to smooth line width parameters. | |
| 62 | </p></dd><dt><span class="term"><code class="constant">GL_ARRAY_BUFFER_BINDING</code></span></dt><dd><p> | |
| 63 | </p><p> | |
| 64 | <em class="parameter"><code>params</code></em> returns a single value, the name of the buffer object | |
| 65 | currently bound to the target <code class="constant">GL_ARRAY_BUFFER</code>. If no buffer object | |
| 66 | is bound to this target, 0 is returned. The initial value is 0. | |
| 67 | See <a href="glBindBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glBindBuffer</span></span></a>. | |
| 68 | </p></dd><dt><span class="term"><code class="constant">GL_BLEND</code></span></dt><dd><p> | |
| 69 | </p><p> | |
| 70 | <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether blending is | |
| 71 | enabled. The initial value is <code class="constant">GL_FALSE</code>. | |
| 72 | See <a href="glBlendFunc.xml"><span class="citerefentry"><span class="refentrytitle">glBlendFunc</span></span></a>. | |
| 73 | </p></dd><dt><span class="term"><code class="constant">GL_BLEND_COLOR</code></span></dt><dd><p> | |
| 74 | </p><p> | |
| 75 | <em class="parameter"><code>params</code></em> returns four values, | |
| 76 | the red, green, blue, and alpha values which are the components of | |
| 77 | the blend color. | |
| 78 | See <a href="glBlendColor.xml"><span class="citerefentry"><span class="refentrytitle">glBlendColor</span></span></a>. | |
| 79 | </p></dd><dt><span class="term"><code class="constant">GL_BLEND_DST_ALPHA</code></span></dt><dd><p> | |
| 80 | </p><p> | |
| 81 | <em class="parameter"><code>params</code></em> returns one value, | |
| 82 | the symbolic constant identifying the alpha destination blend | |
| 83 | function. The initial value is <code class="constant">GL_ZERO</code>. | |
| 84 | 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>. | |
| 85 | </p></dd><dt><span class="term"><code class="constant">GL_BLEND_DST_RGB</code></span></dt><dd><p> | |
| 86 | </p><p> | |
| 87 | <em class="parameter"><code>params</code></em> returns one value, | |
| 88 | the symbolic constant identifying the RGB destination blend | |
| 89 | function. The initial value is <code class="constant">GL_ZERO</code>. | |
| 90 | 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>. | |
| 91 | </p></dd><dt><span class="term"><code class="constant">GL_BLEND_EQUATION_RGB</code></span></dt><dd><p> | |
| 92 | </p><p> | |
| 93 | <em class="parameter"><code>params</code></em> returns one value, a symbolic constant indicating whether | |
| 94 | the RGB blend equation is <code class="constant">GL_FUNC_ADD</code>, <code class="constant">GL_FUNC_SUBTRACT</code>, | |
| 95 | <code class="constant">GL_FUNC_REVERSE_SUBTRACT</code>, <code class="constant">GL_MIN</code> or <code class="constant">GL_MAX</code>. | |
| 96 | See <a href="glBlendEquationSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glBlendEquationSeparate</span></span></a>. | |
| 97 | </p></dd><dt><span class="term"><code class="constant">GL_BLEND_EQUATION_ALPHA</code></span></dt><dd><p> | |
| 98 | </p><p> | |
| 99 | <em class="parameter"><code>params</code></em> returns one value, a symbolic constant indicating whether | |
| 100 | the Alpha blend equation is <code class="constant">GL_FUNC_ADD</code>, <code class="constant">GL_FUNC_SUBTRACT</code>, | |
| 101 | <code class="constant">GL_FUNC_REVERSE_SUBTRACT</code>, <code class="constant">GL_MIN</code> or <code class="constant">GL_MAX</code>. | |
| 102 | See <a href="glBlendEquationSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glBlendEquationSeparate</span></span></a>. | |
| 103 | </p></dd><dt><span class="term"><code class="constant">GL_BLEND_SRC_ALPHA</code></span></dt><dd><p> | |
| 104 | </p><p> | |
| 105 | <em class="parameter"><code>params</code></em> returns one value, | |
| 106 | the symbolic constant identifying the alpha source blend function. The initial | |
| 107 | value is <code class="constant">GL_ONE</code>. | |
| 108 | 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>. | |
| 109 | </p></dd><dt><span class="term"><code class="constant">GL_BLEND_SRC_RGB</code></span></dt><dd><p> | |
| 110 | </p><p> | |
| 111 | <em class="parameter"><code>params</code></em> returns one value, | |
| 112 | the symbolic constant identifying the RGB source blend function. The initial | |
| 113 | value is <code class="constant">GL_ONE</code>. | |
| 114 | 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>. | |
| 115 | </p></dd><dt><span class="term"><code class="constant">GL_COLOR_CLEAR_VALUE</code></span></dt><dd><p> | |
| 116 | </p><p> | |
| 117 | <em class="parameter"><code>params</code></em> returns four values: | |
| 118 | the red, green, blue, and alpha values used to clear the color buffers. | |
| 119 | Integer values, | |
| 120 | if requested, | |
| 121 | are linearly mapped from the internal floating-point representation such | |
| 122 | that 1.0 returns the most positive representable integer value, | |
| 123 | and | |
| 124 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
| 125 | ||
| 126 | <mml:mn>-1.0</mml:mn> | |
| 127 | </mml:math> | |
| 128 | returns the most negative representable integer | |
| 129 | value. The initial value is (0, 0, 0, 0). | |
| 130 | See <a href="glClearColor.xml"><span class="citerefentry"><span class="refentrytitle">glClearColor</span></span></a>. | |
| 131 | </p></dd><dt><span class="term"><code class="constant">GL_COLOR_LOGIC_OP</code></span></dt><dd><p> | |
| 132 | </p><p> | |
| 133 | <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether a fragment's | |
| 134 | RGBA color values are merged into the framebuffer using a logical | |
| 135 | operation. The initial value is <code class="constant">GL_FALSE</code>. | |
| 136 | See <a href="glLogicOp.xml"><span class="citerefentry"><span class="refentrytitle">glLogicOp</span></span></a>. | |
| 137 | </p></dd><dt><span class="term"><code class="constant">GL_COLOR_WRITEMASK</code></span></dt><dd><p> | |
| 138 | </p><p> | |
| 139 | <em class="parameter"><code>params</code></em> returns four boolean values: | |
| 140 | the red, green, blue, and alpha write enables for the color | |
| 141 | buffers. The initial value is (<code class="constant">GL_TRUE</code>, <code class="constant">GL_TRUE</code>, | |
| 142 | <code class="constant">GL_TRUE</code>, <code class="constant">GL_TRUE</code>). | |
| 143 | See <a href="glColorMask.xml"><span class="citerefentry"><span class="refentrytitle">glColorMask</span></span></a>. | |
| 144 | </p></dd><dt><span class="term"><code class="constant">GL_COMPRESSED_TEXTURE_FORMATS</code></span></dt><dd><p> | |
| 145 | </p><p> | |
| 146 | <em class="parameter"><code>params</code></em> returns a list of symbolic | |
| 147 | constants of length <code class="constant">GL_NUM_COMPRESSED_TEXTURE_FORMATS</code> | |
| 148 | indicating which compressed texture formats are available. | |
| 149 | See <a href="glCompressedTexImage2D.xml"><span class="citerefentry"><span class="refentrytitle">glCompressedTexImage2D</span></span></a>. | |
| 150 | </p></dd><dt><span class="term"><code class="constant">GL_CULL_FACE</code></span></dt><dd><p> | |
| 151 | </p><p> | |
| 152 | <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether polygon culling | |
| 153 | is enabled. The initial value is <code class="constant">GL_FALSE</code>. | |
| 154 | See <a href="glCullFace.xml"><span class="citerefentry"><span class="refentrytitle">glCullFace</span></span></a>. | |
| 155 | </p></dd><dt><span class="term"><code class="constant">GL_CURRENT_PROGRAM</code></span></dt><dd><p> | |
| 156 | </p><p> | |
| 157 | <em class="parameter"><code>params</code></em> returns one value, | |
| 158 | the name of the program object that is currently active, or 0 if no program object is active. | |
| 159 | See <a href="glUseProgram.xml"><span class="citerefentry"><span class="refentrytitle">glUseProgram</span></span></a>. | |
| 160 | </p></dd><dt><span class="term"><code class="constant">GL_DEPTH_CLEAR_VALUE</code></span></dt><dd><p> | |
| 161 | </p><p> | |
| 162 | <em class="parameter"><code>params</code></em> returns one value, | |
| 163 | the value that is used to clear the depth buffer. | |
| 164 | Integer values, | |
| 165 | if requested, | |
| 166 | are linearly mapped from the internal floating-point representation such | |
| 167 | that 1.0 returns the most positive representable integer value, | |
| 168 | and | |
| 169 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
| 170 | ||
| 171 | <mml:mn>-1.0</mml:mn> | |
| 172 | </mml:math> | |
| 173 | returns the most negative representable integer | |
| 174 | value. The initial value is 1. | |
| 175 | See <a href="glClearDepth.xml"><span class="citerefentry"><span class="refentrytitle">glClearDepth</span></span></a>. | |
| 176 | </p></dd><dt><span class="term"><code class="constant">GL_DEPTH_FUNC</code></span></dt><dd><p> | |
| 177 | </p><p> | |
| 178 | <em class="parameter"><code>params</code></em> returns one value, | |
| 179 | the symbolic constant that indicates the depth comparison | |
| 180 | function. The initial value is <code class="constant">GL_LESS</code>. | |
| 181 | See <a href="glDepthFunc.xml"><span class="citerefentry"><span class="refentrytitle">glDepthFunc</span></span></a>. | |
| 182 | </p></dd><dt><span class="term"><code class="constant">GL_DEPTH_RANGE</code></span></dt><dd><p> | |
| 183 | </p><p> | |
| 184 | <em class="parameter"><code>params</code></em> returns two values: | |
| 185 | the near and far mapping limits for the depth buffer. | |
| 186 | Integer values, | |
| 187 | if requested, | |
| 188 | are linearly mapped from the internal floating-point representation such | |
| 189 | that 1.0 returns the most positive representable integer value, | |
| 190 | and | |
| 191 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> | |
| 192 | ||
| 193 | <mml:mn>-1.0</mml:mn> | |
| 194 | </mml:math> | |
| 195 | returns the most negative representable integer | |
| 196 | value. The initial value is (0, 1). | |
| 197 | See <a href="glDepthRange.xml"><span class="citerefentry"><span class="refentrytitle">glDepthRange</span></span></a>. | |
| 198 | </p></dd><dt><span class="term"><code class="constant">GL_DEPTH_TEST</code></span></dt><dd><p> | |
| 199 | </p><p> | |
| 200 | <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether depth testing | |
| 201 | of fragments is enabled. The initial value is <code class="constant">GL_FALSE</code>. | |
| 202 | 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>. | |
| 203 | </p></dd><dt><span class="term"><code class="constant">GL_DEPTH_WRITEMASK</code></span></dt><dd><p> | |
| 204 | </p><p> | |
| 205 | <em class="parameter"><code>params</code></em> returns a single boolean value indicating if the depth buffer | |
| 206 | is enabled for writing. The initial value is <code class="constant">GL_TRUE</code>. | |
| 207 | See <a href="glDepthMask.xml"><span class="citerefentry"><span class="refentrytitle">glDepthMask</span></span></a>. | |
| 208 | </p></dd><dt><span class="term"><code class="constant">GL_DITHER</code></span></dt><dd><p> | |
| 209 | </p><p> | |
| 210 | <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether dithering of | |
| 211 | fragment colors and indices is enabled. The initial value is <code class="constant">GL_TRUE</code>. | |
| 212 | </p></dd><dt><span class="term"><code class="constant">GL_DOUBLEBUFFER</code></span></dt><dd><p> | |
| 213 | </p><p> | |
| 214 | <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether double buffering | |
| 215 | is supported. | |
| 216 | </p></dd><dt><span class="term"><code class="constant">GL_DRAW_BUFFER</code></span></dt><dd><p> | |
| 217 | </p><p> | |
| 218 | <em class="parameter"><code>params</code></em> returns one value, | |
| 219 | a symbolic constant indicating which buffers are being drawn to. | |
| 220 | 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 | |
| 221 | are back buffers, otherwise it is <code class="constant">GL_FRONT</code>. | |
| 222 | </p></dd><dt><span class="term"><code class="constant">GL_DRAW_BUFFER</code><span class="emphasis"><em>i</em></span></span></dt><dd><p> | |
| 223 | </p><p> | |
| 224 | <em class="parameter"><code>params</code></em> returns one value, | |
| 225 | a symbolic constant indicating which buffers are being drawn to by the corresponding output color. | |
| 226 | See <a href="glDrawBuffers.xml"><span class="citerefentry"><span class="refentrytitle">glDrawBuffers</span></span></a>. | |
| 227 | The initial value of <code class="constant">GL_DRAW_BUFFER0</code> is <code class="constant">GL_BACK</code> if there | |
| 228 | are back buffers, otherwise it is <code class="constant">GL_FRONT</code>. The | |
| 229 | initial values of draw buffers for all other output colors is <code class="constant">GL_NONE</code>. | |
| 230 | </p></dd><dt><span class="term"><code class="constant">GL_DRAW_FRAMEBUFFER_BINDING</code></span></dt><dd><p> | |
| 231 | </p><p> | |
| 232 | <em class="parameter"><code>params</code></em> returns one value, | |
| 233 | the name of the framebuffer object currently bound to the <code class="constant">GL_DRAW_FRAMEBUFFER</code> target. | |
| 234 | If the default framebuffer is bound, this value will be zero. The initial value is zero. | |
| 235 | See <a href="glBindFramebuffer.xml"><span class="citerefentry"><span class="refentrytitle">glBindFramebuffer</span></span></a>. | |
| 236 | </p></dd><dt><span class="term"><code class="constant">GL_READ_FRAMEBUFFER_BINDING</code></span></dt><dd><p> | |
| 237 | </p><p> | |
| 238 | <em class="parameter"><code>params</code></em> returns one value, | |
| 239 | the name of the framebuffer object currently bound to the <code class="constant">GL_READ_FRAMEBUFFER</code> target. | |
| 240 | If the default framebuffer is bound, this value will be zero. The initial value is zero. | |
| 241 | See <a href="glBindFramebuffer.xml"><span class="citerefentry"><span class="refentrytitle">glBindFramebuffer</span></span></a>. | |
| 242 | </p></dd><dt><span class="term"><code class="constant">GL_ELEMENT_ARRAY_BUFFER_BINDING</code></span></dt><dd><p> | |
| 243 | </p><p> | |
| 244 | <em class="parameter"><code>params</code></em> returns a single value, the name of the buffer object | |
| 245 | currently bound to the target <code class="constant">GL_ELEMENT_ARRAY_BUFFER</code>. If no buffer object | |
| 246 | is bound to this target, 0 is returned. The initial value is 0. | |
| 247 | See <a href="glBindBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glBindBuffer</span></span></a>. | |
| 248 | </p></dd><dt><span class="term"><code class="constant">GL_RENDERBUFFER_BINDING</code></span></dt><dd><p> | |
| 249 | </p><p> | |
| 250 | <em class="parameter"><code>params</code></em> returns a single value, the name of the renderbuffer object | |
| 251 | currently bound to the target <code class="constant">GL_RENDERBUFFER</code>. If no renderbuffer object | |
| 252 | is bound to this target, 0 is returned. The initial value is 0. | |
| 253 | See <a href="glBindRenderbuffer.xml"><span class="citerefentry"><span class="refentrytitle">glBindRenderbuffer</span></span></a>. | |
| 254 | </p></dd><dt><span class="term"><code class="constant">GL_FRAGMENT_SHADER_DERIVATIVE_HINT</code></span></dt><dd><p> | |
| 255 | </p><p> | |
| 256 | <em class="parameter"><code>params</code></em> returns one value, | |
| 257 | a symbolic constant indicating the mode of the derivative accuracy hint | |
| 258 | for fragment shaders. The initial value | |
| 259 | is <code class="constant">GL_DONT_CARE</code>. | |
| 260 | See <a href="glHint.xml"><span class="citerefentry"><span class="refentrytitle">glHint</span></span></a>. | |
| 261 | </p></dd><dt><span class="term"><code class="constant">GL_LINE_SMOOTH</code></span></dt><dd><p> | |
| 262 | </p><p> | |
| 263 | <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether antialiasing of | |
| 264 | lines is enabled. The initial value is <code class="constant">GL_FALSE</code>. | |
| 265 | See <a href="glLineWidth.xml"><span class="citerefentry"><span class="refentrytitle">glLineWidth</span></span></a>. | |
| 266 | </p></dd><dt><span class="term"><code class="constant">GL_LINE_SMOOTH_HINT</code></span></dt><dd><p> | |
| 267 | </p><p> | |
| 268 | <em class="parameter"><code>params</code></em> returns one value, | |
| 269 | a symbolic constant indicating the mode of the line antialiasing | |
| 270 | hint. The initial value is <code class="constant">GL_DONT_CARE</code>. | |
| 271 | See <a href="glHint.xml"><span class="citerefentry"><span class="refentrytitle">glHint</span></span></a>. | |
| 272 | </p></dd><dt><span class="term"><code class="constant">GL_LINE_WIDTH</code></span></dt><dd><p> | |
| 273 | </p><p> | |
| 274 | <em class="parameter"><code>params</code></em> returns one value, | |
| 275 | the line width as specified with <a href="glLineWidth.xml"><span class="citerefentry"><span class="refentrytitle">glLineWidth</span></span></a>. The initial value is | |
| 276 | 1. | |
| 7faf1d71 AW |
277 | </p></dd><dt><span class="term"><code class="constant">GL_LOGIC_OP_MODE</code></span></dt><dd><p> |
| 278 | </p><p> | |
| 279 | <em class="parameter"><code>params</code></em> returns one value, | |
| 280 | a symbolic constant indicating the selected logic operation | |
| 281 | mode. The initial value is <code class="constant">GL_COPY</code>. | |
| 282 | See <a href="glLogicOp.xml"><span class="citerefentry"><span class="refentrytitle">glLogicOp</span></span></a>. | |
| 283 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_3D_TEXTURE_SIZE</code></span></dt><dd><p> | |
| 284 | </p><p> | |
| 285 | <em class="parameter"><code>params</code></em> returns one value, | |
| 286 | a rough estimate of the largest 3D texture that the GL can handle. | |
| 287 | The value must be at least 64. | |
| 288 | Use <code class="constant">GL_PROXY_TEXTURE_3D</code> to determine if a texture is too large. | |
| 289 | See <a href="glTexImage3D.xml"><span class="citerefentry"><span class="refentrytitle">glTexImage3D</span></span></a>. | |
| 290 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_CLIP_DISTANCES</code></span></dt><dd><p> | |
| 291 | </p><p> | |
| 292 | <em class="parameter"><code>params</code></em> returns one value, | |
| 293 | the maximum number of application-defined clipping distances. The value must be at least 8. | |
| 294 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS</code></span></dt><dd><p> | |
| 295 | </p><p> | |
| 296 | <em class="parameter"><code>params</code></em> returns one value, | |
| 297 | the number of words for fragment shader uniform variables in all uniform | |
| 298 | blocks (including default). The value must be at least 1. | |
| 299 | See <a href="glUniform.xml"><span class="citerefentry"><span class="refentrytitle">glUniform</span></span></a>. | |
| 300 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS</code></span></dt><dd><p> | |
| 301 | </p><p> | |
| 302 | <em class="parameter"><code>params</code></em> returns one value, the maximum supported texture image units that | |
| 303 | can be used to access texture maps from the vertex shader and the fragment processor combined. | |
| 304 | If both the vertex shader and the fragment processing stage access the same texture image | |
| 305 | unit, then that counts as using two texture image units against this limit. | |
| 306 | The value must be at least 48. | |
| 307 | See <a href="glActiveTexture.xml"><span class="citerefentry"><span class="refentrytitle">glActiveTexture</span></span></a>. | |
| 308 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS</code></span></dt><dd><p> | |
| 309 | </p><p> | |
| 310 | <em class="parameter"><code>params</code></em> returns one value, | |
| 311 | the number of words for vertex shader uniform variables in all uniform | |
| 312 | blocks (including default). The value must be at least 1. | |
| 313 | See <a href="glUniform.xml"><span class="citerefentry"><span class="refentrytitle">glUniform</span></span></a>. | |
| 314 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_COMBINED_GEOMETRY_UNIFORM_COMPONENTS</code></span></dt><dd><p> | |
| 315 | </p><p> | |
| 316 | <em class="parameter"><code>params</code></em> returns one value, | |
| 317 | the number of words for geometry shader uniform variables in all uniform | |
| 318 | blocks (including default). The value must be at least 1. | |
| 319 | See <a href="glUniform.xml"><span class="citerefentry"><span class="refentrytitle">glUniform</span></span></a>. | |
| 320 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_VARYING_COMPONENTS</code></span></dt><dd><p> | |
| 321 | </p><p> | |
| 322 | <em class="parameter"><code>params</code></em> returns one value, | |
| 323 | the number components for varying variables, which must be at least 60. | |
| 324 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_COMBINED_UNIFORM_BLOCKS</code></span></dt><dd><p> | |
| 325 | </p><p> | |
| 326 | <em class="parameter"><code>params</code></em> returns one value, | |
| 327 | the maximum number of uniform blocks per program. The value must be at least 36. | |
| 328 | See <a href="glUniformBlockBinding.xml"><span class="citerefentry"><span class="refentrytitle">glUniformBlockBinding</span></span></a>. | |
| 329 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_CUBE_MAP_TEXTURE_SIZE</code></span></dt><dd><p> | |
| 330 | </p><p> | |
| 331 | <em class="parameter"><code>params</code></em> returns one value. | |
| 332 | The value gives a rough estimate of the largest cube-map texture that | |
| 333 | the GL can handle. The value must be at least 1024. | |
| 334 | Use <code class="constant">GL_PROXY_TEXTURE_CUBE_MAP</code> | |
| 335 | to determine if a texture is too large. | |
| 336 | See <a href="glTexImage2D.xml"><span class="citerefentry"><span class="refentrytitle">glTexImage2D</span></span></a>. | |
| 337 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_DRAW_BUFFERS</code></span></dt><dd><p> | |
| 338 | </p><p> | |
| 339 | <em class="parameter"><code>params</code></em> returns one value, the maximum number | |
| 340 | of simultaneous outputs that may be written in a fragment shader. | |
| 341 | The value must be at least 8. | |
| 342 | See <a href="glDrawBuffers.xml"><span class="citerefentry"><span class="refentrytitle">glDrawBuffers</span></span></a>. | |
| c7b31271 | 343 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_DUAL_SOURCE_DRAW_BUFFERS</code></span></dt><dd><p> |
| 7faf1d71 AW |
344 | </p><p> |
| 345 | <em class="parameter"><code>params</code></em> returns one value, the maximum number | |
| 346 | of active draw buffers when using dual-source blending. The value must be at least 1. | |
| 347 | See <a href="glBlendFunc.xml"><span class="citerefentry"><span class="refentrytitle">glBlendFunc</span></span></a> and | |
| 348 | <a href="glBlendFuncSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glBlendFuncSeparate</span></span></a>. | |
| 349 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_ELEMENTS_INDICES</code></span></dt><dd><p> | |
| 350 | </p><p> | |
| 351 | <em class="parameter"><code>params</code></em> returns one value, | |
| 352 | the recommended maximum number of vertex array indices. | |
| 353 | See <a href="glDrawRangeElements.xml"><span class="citerefentry"><span class="refentrytitle">glDrawRangeElements</span></span></a>. | |
| 354 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_ELEMENTS_VERTICES</code></span></dt><dd><p> | |
| 355 | </p><p> | |
| 356 | <em class="parameter"><code>params</code></em> returns one value, | |
| 357 | the recommended maximum number of vertex array vertices. | |
| 358 | See <a href="glDrawRangeElements.xml"><span class="citerefentry"><span class="refentrytitle">glDrawRangeElements</span></span></a>. | |
| 359 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_FRAGMENT_UNIFORM_COMPONENTS</code></span></dt><dd><p> | |
| 360 | </p><p> | |
| 361 | <em class="parameter"><code>params</code></em> returns one value, | |
| 362 | the maximum number of individual floating-point, integer, or boolean values that can be held | |
| 363 | in uniform variable storage for a fragment shader. The value must be at least 1024. | |
| 364 | See <a href="glUniform.xml"><span class="citerefentry"><span class="refentrytitle">glUniform</span></span></a>. | |
| 365 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_FRAGMENT_UNIFORM_BLOCKS</code></span></dt><dd><p> | |
| 366 | </p><p> | |
| 367 | <em class="parameter"><code>params</code></em> returns one value, | |
| 368 | the maximum number of uniform blocks per fragment shader. The value must be at least 12. | |
| 369 | See <a href="glUniformBlockBinding.xml"><span class="citerefentry"><span class="refentrytitle">glUniformBlockBinding</span></span></a>. | |
| 370 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_FRAGMENT_INPUT_COMPONENTS</code></span></dt><dd><p> | |
| 371 | </p><p> | |
| 372 | <em class="parameter"><code>params</code></em> returns one value, | |
| 373 | the maximum number of components of the inputs read by the fragment shader, which must be at least 128. | |
| 374 | </p></dd><dt><span class="term"><code class="constant">GL_MIN_PROGRAM_TEXEL_OFFSET</code></span></dt><dd><p> | |
| 375 | </p><p> | |
| 376 | <em class="parameter"><code>params</code></em> returns one value, | |
| 377 | the minimum texel offset allowed in a texture lookup, which must be at most -8. | |
| 378 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_PROGRAM_TEXEL_OFFSET</code></span></dt><dd><p> | |
| 379 | </p><p> | |
| 380 | <em class="parameter"><code>params</code></em> returns one value, | |
| 381 | the maximum texel offset allowed in a texture lookup, which must be at least 7. | |
| 382 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_RECTANGLE_TEXTURE_SIZE</code></span></dt><dd><p> | |
| 383 | </p><p> | |
| 384 | <em class="parameter"><code>params</code></em> returns one value. | |
| 385 | The value gives a rough estimate of the largest rectangular texture that | |
| 386 | the GL can handle. The value must be at least 1024. | |
| c7b31271 | 387 | Use <code class="constant">GL_PROXY_TEXTURE_RECTANGLE</code> |
| 7faf1d71 AW |
388 | to determine if a texture is too large. |
| 389 | See <a href="glTexImage2D.xml"><span class="citerefentry"><span class="refentrytitle">glTexImage2D</span></span></a>. | |
| 390 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_TEXTURE_IMAGE_UNITS</code></span></dt><dd><p> | |
| 391 | </p><p> | |
| 392 | <em class="parameter"><code>params</code></em> returns one value, the maximum supported texture image units that | |
| 393 | can be used to access texture maps from the fragment shader. | |
| 394 | The value must be at least 16. | |
| 395 | See <a href="glActiveTexture.xml"><span class="citerefentry"><span class="refentrytitle">glActiveTexture</span></span></a>. | |
| 396 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_TEXTURE_LOD_BIAS</code></span></dt><dd><p> | |
| 397 | </p><p> | |
| 398 | <em class="parameter"><code>params</code></em> returns one value, | |
| 399 | the maximum, absolute value of the texture level-of-detail bias. The | |
| 400 | value must be at least 2.0. | |
| 401 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_TEXTURE_SIZE</code></span></dt><dd><p> | |
| 402 | </p><p> | |
| 403 | <em class="parameter"><code>params</code></em> returns one value. | |
| 404 | The value gives a rough estimate of the largest texture that | |
| 405 | the GL can handle. The value must be at least 1024. | |
| 406 | Use a proxy texture target such as <code class="constant">GL_PROXY_TEXTURE_1D</code> or <code class="constant">GL_PROXY_TEXTURE_2D</code> | |
| 407 | to determine if a texture is too large. | |
| 408 | 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>. | |
| 409 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_RENDERBUFFER_SIZE</code></span></dt><dd><p> | |
| 410 | </p><p> | |
| 411 | <em class="parameter"><code>params</code></em> returns one value. | |
| 412 | The value indicates the maximum supported size for renderbuffers. | |
| 413 | See <a href="glFramebufferRenderbuffer.xml"><span class="citerefentry"><span class="refentrytitle">glFramebufferRenderbuffer</span></span></a>. | |
| 414 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_ARRAY_TEXTURE_LAYERS</code></span></dt><dd><p> | |
| 415 | </p><p> | |
| 416 | <em class="parameter"><code>params</code></em> returns one value. | |
| 417 | The value indicates the maximum number of layers allowed in an array texture, and must be at least 256. | |
| 418 | See <a href="glTexImage2D.xml"><span class="citerefentry"><span class="refentrytitle">glTexImage2D</span></span></a>. | |
| 419 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_TEXTURE_BUFFER_SIZE</code></span></dt><dd><p> | |
| 420 | </p><p> | |
| 421 | <em class="parameter"><code>params</code></em> returns one value. | |
| 422 | The value gives the maximum number of texels allowed in the texel array of a texture buffer object. | |
| 423 | Value must be at least 65536. | |
| 424 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_UNIFORM_BLOCK_SIZE</code></span></dt><dd><p> | |
| 425 | </p><p> | |
| 426 | <em class="parameter"><code>params</code></em> returns one value, | |
| 427 | the maximum size in basic machine units of a uniform block. | |
| 428 | The value must be at least 16384. | |
| 429 | See <a href="glUniformBlockBinding.xml"><span class="citerefentry"><span class="refentrytitle">glUniformBlockBinding</span></span></a>. | |
| 430 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_VARYING_FLOATS</code></span></dt><dd><p> | |
| 431 | </p><p> | |
| 432 | <em class="parameter"><code>params</code></em> returns one value, | |
| 433 | the maximum number of interpolators available for processing varying variables used by | |
| 434 | vertex and fragment shaders. This value represents the number of individual floating-point | |
| 435 | values that can be interpolated; varying variables declared as vectors, matrices, and arrays | |
| 436 | will all consume multiple interpolators. The value must be at least 32. | |
| 437 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_VERTEX_ATTRIBS</code></span></dt><dd><p> | |
| 438 | </p><p> | |
| 439 | <em class="parameter"><code>params</code></em> returns one value, | |
| 440 | the maximum number of 4-component generic vertex attributes accessible to a vertex shader. | |
| 441 | The value must be at least 16. | |
| 442 | See <a href="glVertexAttrib.xml"><span class="citerefentry"><span class="refentrytitle">glVertexAttrib</span></span></a>. | |
| 443 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS</code></span></dt><dd><p> | |
| 444 | </p><p> | |
| 445 | <em class="parameter"><code>params</code></em> returns one value, the maximum supported texture image units that | |
| 446 | can be used to access texture maps from the vertex shader. The value may be at least 16. | |
| 447 | See <a href="glActiveTexture.xml"><span class="citerefentry"><span class="refentrytitle">glActiveTexture</span></span></a>. | |
| 448 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS</code></span></dt><dd><p> | |
| 449 | </p><p> | |
| 450 | <em class="parameter"><code>params</code></em> returns one value, the maximum supported texture image units that | |
| 451 | can be used to access texture maps from the geometry shader. The value must be at least 16. | |
| 452 | See <a href="glActiveTexture.xml"><span class="citerefentry"><span class="refentrytitle">glActiveTexture</span></span></a>. | |
| 453 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_VERTEX_UNIFORM_COMPONENTS</code></span></dt><dd><p> | |
| 454 | </p><p> | |
| 455 | <em class="parameter"><code>params</code></em> returns one value, | |
| 456 | the maximum number of individual floating-point, integer, or boolean values that can be held | |
| 457 | in uniform variable storage for a vertex shader. The value must be at least 1024. | |
| 458 | See <a href="glUniform.xml"><span class="citerefentry"><span class="refentrytitle">glUniform</span></span></a>. | |
| 459 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_VERTEX_OUTPUT_COMPONENTS</code></span></dt><dd><p> | |
| 460 | </p><p> | |
| 461 | <em class="parameter"><code>params</code></em> returns one value, | |
| 462 | the maximum number of components of output written by a vertex shader, which must be at least 64. | |
| 463 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_GEOMETRY_UNIFORM_COMPONENTS</code></span></dt><dd><p> | |
| 464 | </p><p> | |
| 465 | <em class="parameter"><code>params</code></em> returns one value, | |
| 466 | the maximum number of individual floating-point, integer, or boolean values that can be held | |
| 467 | in uniform variable storage for a geometry shader. The value must be at least 1024. | |
| 468 | See <a href="glUniform.xml"><span class="citerefentry"><span class="refentrytitle">glUniform</span></span></a>. | |
| 469 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_SAMPLE_MASK_WORDS</code></span></dt><dd><p> | |
| 470 | </p><p> | |
| 471 | <em class="parameter"><code>params</code></em> returns one value, | |
| 472 | the maximum number of sample mask words. | |
| 473 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_COLOR_TEXTURE_SAMPLES</code></span></dt><dd><p> | |
| 474 | </p><p> | |
| 475 | <em class="parameter"><code>params</code></em> returns one value, | |
| 476 | the maximum number of samples in a color multisample texture. | |
| 477 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_DEPTH_TEXTURE_SAMPLES</code></span></dt><dd><p> | |
| 478 | </p><p> | |
| 479 | <em class="parameter"><code>params</code></em> returns one value, | |
| 480 | the maximum number of samples in a multisample depth or depth-stencil texture. | |
| 481 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_DEPTH_TEXTURE_SAMPLES</code></span></dt><dd><p> | |
| 482 | </p><p> | |
| 483 | <em class="parameter"><code>params</code></em> returns one value, | |
| 484 | the maximum number of samples in a multisample depth or depth-stencil texture. | |
| 485 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_INTEGER_SAMPLES</code></span></dt><dd><p> | |
| 486 | </p><p> | |
| 487 | <em class="parameter"><code>params</code></em> returns one value, | |
| 488 | the maximum number of samples supported in integer format multisample buffers. | |
| 489 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_SERVER_WAIT_TIMEOUT</code></span></dt><dd><p> | |
| 490 | </p><p> | |
| 491 | <em class="parameter"><code>params</code></em> returns one value, | |
| 492 | the maximum <a href="glWaitSync.xml"><span class="citerefentry"><span class="refentrytitle">glWaitSync</span></span></a> timeout interval. | |
| 493 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_UNIFORM_BUFFER_BINDINGS</code></span></dt><dd><p> | |
| 494 | </p><p> | |
| 495 | <em class="parameter"><code>params</code></em> returns one value, | |
| 496 | the maximum number of uniform buffer binding points on the context, which must be at least 36. | |
| 497 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_UNIFORM_BLOCK_SIZE</code></span></dt><dd><p> | |
| 498 | </p><p> | |
| 499 | <em class="parameter"><code>params</code></em> returns one value, | |
| 500 | the maximum size in basic machine units of a uniform block, which must be at least 16384. | |
| 501 | </p></dd><dt><span class="term"><code class="constant">GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT</code></span></dt><dd><p> | |
| 502 | </p><p> | |
| 503 | <em class="parameter"><code>params</code></em> returns one value, | |
| 504 | the minimum required alignment for uniform buffer sizes and offsets. | |
| 505 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_VERTEX_UNIFORM_BLOCKS</code></span></dt><dd><p> | |
| 506 | </p><p> | |
| 507 | <em class="parameter"><code>params</code></em> returns one value, | |
| 508 | the maximum number of uniform blocks per vertex shader. The value must be at least 12. | |
| 509 | See <a href="glUniformBlockBinding.xml"><span class="citerefentry"><span class="refentrytitle">glUniformBlockBinding</span></span></a>. | |
| 510 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_GEOMETRY_UNIFORM_BLOCKS</code></span></dt><dd><p> | |
| 511 | </p><p> | |
| 512 | <em class="parameter"><code>params</code></em> returns one value, | |
| 513 | the maximum number of uniform blocks per geometry shader. The value must be at least 12. | |
| 514 | See <a href="glUniformBlockBinding.xml"><span class="citerefentry"><span class="refentrytitle">glUniformBlockBinding</span></span></a>. | |
| 515 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_GEOMETRY_INPUT_COMPONENTS</code></span></dt><dd><p> | |
| 516 | </p><p> | |
| 517 | <em class="parameter"><code>params</code></em> returns one value, | |
| 518 | the maximum number of components of inputs read by a geometry shader, which must be at least 64. | |
| 519 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_GEOMETRY_OUTPUT_COMPONENTS</code></span></dt><dd><p> | |
| 520 | </p><p> | |
| 521 | <em class="parameter"><code>params</code></em> returns one value, | |
| 522 | the maximum number of components of outputs written by a geometry shader, which must be at least 128. | |
| 523 | </p></dd><dt><span class="term"><code class="constant">GL_MAX_VIEWPORT_DIMS</code></span></dt><dd><p> | |
| 524 | </p><p> | |
| 525 | <em class="parameter"><code>params</code></em> returns two values: | |
| 526 | the maximum supported width and height of the viewport. | |
| 527 | These must be at least as large as the visible dimensions of the display | |
| 528 | being rendered to. | |
| 529 | See <a href="glViewport.xml"><span class="citerefentry"><span class="refentrytitle">glViewport</span></span></a>. | |
| 530 | </p></dd><dt><span class="term"><code class="constant">GL_NUM_COMPRESSED_TEXTURE_FORMATS</code></span></dt><dd><p> | |
| 531 | </p><p> | |
| 532 | <em class="parameter"><code>params</code></em> returns a single integer value indicating the number of available | |
| 533 | compressed texture formats. The minimum value is 4. | |
| 534 | See <a href="glCompressedTexImage2D.xml"><span class="citerefentry"><span class="refentrytitle">glCompressedTexImage2D</span></span></a>. | |
| 535 | </p></dd><dt><span class="term"><code class="constant">GL_PACK_ALIGNMENT</code></span></dt><dd><p> | |
| 536 | </p><p> | |
| 537 | <em class="parameter"><code>params</code></em> returns one value, | |
| 538 | the byte alignment used for writing pixel data to memory. The initial | |
| 539 | value is 4. | |
| 540 | See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>. | |
| 541 | </p></dd><dt><span class="term"><code class="constant">GL_PACK_IMAGE_HEIGHT</code></span></dt><dd><p> | |
| 542 | </p><p> | |
| 543 | <em class="parameter"><code>params</code></em> returns one value, | |
| 544 | the image height used for writing pixel data to memory. The initial | |
| 545 | value is 0. | |
| 546 | See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>. | |
| 547 | </p></dd><dt><span class="term"><code class="constant">GL_PACK_LSB_FIRST</code></span></dt><dd><p> | |
| 548 | </p><p> | |
| 549 | <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether single-bit | |
| 550 | pixels being written to memory are written first to the least significant | |
| 551 | bit of each unsigned byte. The initial value is <code class="constant">GL_FALSE</code>. | |
| 552 | See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>. | |
| 553 | </p></dd><dt><span class="term"><code class="constant">GL_PACK_ROW_LENGTH</code></span></dt><dd><p> | |
| 554 | </p><p> | |
| 555 | <em class="parameter"><code>params</code></em> returns one value, | |
| 556 | the row length used for writing pixel data to memory. The initial value is | |
| 557 | 0. | |
| 558 | See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>. | |
| 559 | </p></dd><dt><span class="term"><code class="constant">GL_PACK_SKIP_IMAGES</code></span></dt><dd><p> | |
| 560 | </p><p> | |
| 561 | <em class="parameter"><code>params</code></em> returns one value, | |
| 562 | the number of pixel images skipped before the first pixel is written | |
| 563 | into memory. The initial value is 0. | |
| 564 | See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>. | |
| 565 | </p></dd><dt><span class="term"><code class="constant">GL_PACK_SKIP_PIXELS</code></span></dt><dd><p> | |
| 566 | </p><p> | |
| 567 | <em class="parameter"><code>params</code></em> returns one value, | |
| 568 | the number of pixel locations skipped before the first pixel is written | |
| 569 | into memory. The initial value is 0. | |
| 570 | See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>. | |
| 571 | </p></dd><dt><span class="term"><code class="constant">GL_PACK_SKIP_ROWS</code></span></dt><dd><p> | |
| 572 | </p><p> | |
| 573 | <em class="parameter"><code>params</code></em> returns one value, | |
| 574 | the number of rows of pixel locations skipped before the first pixel is written | |
| 575 | into memory. The initial value is 0. | |
| 576 | See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>. | |
| 577 | </p></dd><dt><span class="term"><code class="constant">GL_PACK_SWAP_BYTES</code></span></dt><dd><p> | |
| 578 | </p><p> | |
| 579 | <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether the bytes of | |
| 580 | two-byte and four-byte pixel indices and components are swapped before being | |
| 581 | written to memory. The initial value is <code class="constant">GL_FALSE</code>. | |
| 582 | See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>. | |
| 583 | </p></dd><dt><span class="term"><code class="constant">GL_PIXEL_PACK_BUFFER_BINDING</code></span></dt><dd><p> | |
| 584 | </p><p> | |
| 585 | <em class="parameter"><code>params</code></em> returns a single value, the name of the buffer object | |
| 586 | currently bound to the target <code class="constant">GL_PIXEL_PACK_BUFFER</code>. If no buffer object | |
| 587 | is bound to this target, 0 is returned. The initial value is 0. | |
| 588 | See <a href="glBindBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glBindBuffer</span></span></a>. | |
| 589 | </p></dd><dt><span class="term"><code class="constant">GL_PIXEL_UNPACK_BUFFER_BINDING</code></span></dt><dd><p> | |
| 590 | </p><p> | |
| 591 | <em class="parameter"><code>params</code></em> returns a single value, the name of the buffer object | |
| 592 | currently bound to the target <code class="constant">GL_PIXEL_UNPACK_BUFFER</code>. If no buffer object | |
| 593 | is bound to this target, 0 is returned. The initial value is 0. | |
| 594 | See <a href="glBindBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glBindBuffer</span></span></a>. | |
| 595 | </p></dd><dt><span class="term"><code class="constant">GL_POINT_FADE_THRESHOLD_SIZE</code></span></dt><dd><p> | |
| 596 | </p><p> | |
| 597 | <em class="parameter"><code>params</code></em> returns one value, | |
| 598 | the point size threshold for determining the point size. | |
| 599 | See <a href="glPointParameter.xml"><span class="citerefentry"><span class="refentrytitle">glPointParameter</span></span></a>. | |
| 600 | </p></dd><dt><span class="term"><code class="constant">GL_PRIMITIVE_RESTART_INDEX</code></span></dt><dd><p> | |
| 601 | </p><p> | |
| 602 | <em class="parameter"><code>params</code></em> returns one value, | |
| 603 | the current primitive restart index. The initial value is 0. | |
| 604 | See <a href="glPrimitiveRestartIndex.xml"><span class="citerefentry"><span class="refentrytitle">glPrimitiveRestartIndex</span></span></a>. | |
| c7b31271 DH |
605 | </p></dd><dt><span class="term"><code class="constant">GL_PROGRAM_POINT_SIZE</code></span></dt><dd><p> |
| 606 | </p><p> | |
| 607 | <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether vertex | |
| 608 | program point size mode is enabled. If enabled, then the | |
| 609 | point size is taken from the shader built-in <code class="code">gl_PointSize</code>. If disabled, | |
| 610 | then the point size is taken from the point state as specified | |
| 611 | by <a href="glPointSize.xml"><span class="citerefentry"><span class="refentrytitle">glPointSize</span></span></a>. | |
| 612 | The initial value is <code class="constant">GL_FALSE</code>. | |
| 7faf1d71 AW |
613 | </p></dd><dt><span class="term"><code class="constant">GL_PROVOKING_VERTEX</code></span></dt><dd><p> |
| 614 | </p><p> | |
| 615 | <em class="parameter"><code>params</code></em> returns one value, | |
| 616 | the currently selected provoking vertex convention. The initial value is <code class="constant">GL_LAST_VERTEX_CONVENTION</code>. | |
| 617 | See <a href="glProvokingVertex.xml"><span class="citerefentry"><span class="refentrytitle">glProvokingVertex</span></span></a>. | |
| 618 | </p></dd><dt><span class="term"><code class="constant">GL_POINT_SIZE</code></span></dt><dd><p> | |
| 619 | </p><p> | |
| 620 | <em class="parameter"><code>params</code></em> returns one value, | |
| 621 | the point size as specified by <a href="glPointSize.xml"><span class="citerefentry"><span class="refentrytitle">glPointSize</span></span></a>. | |
| 622 | The initial value is 1. | |
| 623 | </p></dd><dt><span class="term"><code class="constant">GL_POINT_SIZE_GRANULARITY</code></span></dt><dd><p> | |
| 624 | </p><p> | |
| 625 | <em class="parameter"><code>params</code></em> returns one value, | |
| 626 | the size difference between adjacent supported sizes for antialiased points. | |
| 627 | See <a href="glPointSize.xml"><span class="citerefentry"><span class="refentrytitle">glPointSize</span></span></a>. | |
| 628 | </p></dd><dt><span class="term"><code class="constant">GL_POINT_SIZE_RANGE</code></span></dt><dd><p> | |
| 629 | </p><p> | |
| 630 | <em class="parameter"><code>params</code></em> returns two values: | |
| 631 | the smallest and largest supported sizes for antialiased | |
| 632 | points. The smallest size must be at most 1, and the largest size must | |
| 633 | be at least 1. | |
| 634 | See <a href="glPointSize.xml"><span class="citerefentry"><span class="refentrytitle">glPointSize</span></span></a>. | |
| 635 | </p></dd><dt><span class="term"><code class="constant">GL_POLYGON_OFFSET_FACTOR</code></span></dt><dd><p> | |
| 636 | </p><p> | |
| 637 | <em class="parameter"><code>params</code></em> returns one value, | |
| 638 | the scaling factor used to determine the variable offset that is added | |
| 639 | to the depth value of each fragment generated when a polygon is | |
| 640 | rasterized. The initial value is 0. | |
| 641 | See <a href="glPolygonOffset.xml"><span class="citerefentry"><span class="refentrytitle">glPolygonOffset</span></span></a>. | |
| 642 | </p></dd><dt><span class="term"><code class="constant">GL_POLYGON_OFFSET_UNITS</code></span></dt><dd><p> | |
| 643 | </p><p> | |
| 644 | <em class="parameter"><code>params</code></em> returns one value. | |
| 645 | This value is multiplied by an implementation-specific value and then | |
| 646 | added to the depth value of each fragment | |
| 647 | generated when a polygon is rasterized. The initial value is 0. | |
| 648 | See <a href="glPolygonOffset.xml"><span class="citerefentry"><span class="refentrytitle">glPolygonOffset</span></span></a>. | |
| 649 | </p></dd><dt><span class="term"><code class="constant">GL_POLYGON_OFFSET_FILL</code></span></dt><dd><p> | |
| 650 | </p><p> | |
| 651 | <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether polygon offset | |
| 652 | is enabled for polygons in fill mode. The initial value is <code class="constant">GL_FALSE</code>. | |
| 653 | See <a href="glPolygonOffset.xml"><span class="citerefentry"><span class="refentrytitle">glPolygonOffset</span></span></a>. | |
| 654 | </p></dd><dt><span class="term"><code class="constant">GL_POLYGON_OFFSET_LINE</code></span></dt><dd><p> | |
| 655 | </p><p> | |
| 656 | <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether polygon offset | |
| 657 | is enabled for polygons in line mode. The initial value is <code class="constant">GL_FALSE</code>. | |
| 658 | See <a href="glPolygonOffset.xml"><span class="citerefentry"><span class="refentrytitle">glPolygonOffset</span></span></a>. | |
| 659 | </p></dd><dt><span class="term"><code class="constant">GL_POLYGON_OFFSET_POINT</code></span></dt><dd><p> | |
| 660 | </p><p> | |
| 661 | <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether polygon offset | |
| 662 | is enabled for polygons in point mode. The initial value is <code class="constant">GL_FALSE</code>. | |
| 663 | See <a href="glPolygonOffset.xml"><span class="citerefentry"><span class="refentrytitle">glPolygonOffset</span></span></a>. | |
| 664 | </p></dd><dt><span class="term"><code class="constant">GL_POLYGON_SMOOTH</code></span></dt><dd><p> | |
| 665 | </p><p> | |
| 666 | <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether antialiasing of | |
| 667 | polygons is enabled. The initial value is <code class="constant">GL_FALSE</code>. | |
| 668 | See <a href="glPolygonMode.xml"><span class="citerefentry"><span class="refentrytitle">glPolygonMode</span></span></a>. | |
| 669 | </p></dd><dt><span class="term"><code class="constant">GL_POLYGON_SMOOTH_HINT</code></span></dt><dd><p> | |
| 670 | </p><p> | |
| 671 | <em class="parameter"><code>params</code></em> returns one value, | |
| 672 | a symbolic constant indicating the mode of the polygon antialiasing | |
| 673 | hint. The initial value is <code class="constant">GL_DONT_CARE</code>. | |
| 674 | See <a href="glHint.xml"><span class="citerefentry"><span class="refentrytitle">glHint</span></span></a>. | |
| 675 | </p></dd><dt><span class="term"><code class="constant">GL_READ_BUFFER</code></span></dt><dd><p> | |
| 676 | </p><p> | |
| 677 | <em class="parameter"><code>params</code></em> returns one value, | |
| 678 | a symbolic constant indicating which color buffer is selected for | |
| 679 | reading. The initial value is <code class="constant">GL_BACK</code> if there is a back buffer, | |
| 680 | otherwise it is <code class="constant">GL_FRONT</code>. | |
| 681 | See | |
| 682 | <a href="glReadPixels.xml"><span class="citerefentry"><span class="refentrytitle">glReadPixels</span></span></a>. | |
| 683 | </p></dd><dt><span class="term"><code class="constant">GL_SAMPLE_BUFFERS</code></span></dt><dd><p> | |
| 684 | </p><p> | |
| 685 | <em class="parameter"><code>params</code></em> returns a single integer value indicating the number of sample buffers | |
| 686 | associated with the framebuffer. | |
| 687 | See <a href="glSampleCoverage.xml"><span class="citerefentry"><span class="refentrytitle">glSampleCoverage</span></span></a>. | |
| 688 | </p></dd><dt><span class="term"><code class="constant">GL_SAMPLE_COVERAGE_VALUE</code></span></dt><dd><p> | |
| 689 | </p><p> | |
| 690 | <em class="parameter"><code>params</code></em> returns a single positive floating-point value indicating the | |
| 691 | current sample coverage value. | |
| 692 | See <a href="glSampleCoverage.xml"><span class="citerefentry"><span class="refentrytitle">glSampleCoverage</span></span></a>. | |
| 693 | </p></dd><dt><span class="term"><code class="constant">GL_SAMPLE_COVERAGE_INVERT</code></span></dt><dd><p> | |
| 694 | </p><p> | |
| 695 | <em class="parameter"><code>params</code></em> returns a single boolean value indicating if the temporary | |
| 696 | coverage value should be inverted. | |
| 697 | See <a href="glSampleCoverage.xml"><span class="citerefentry"><span class="refentrytitle">glSampleCoverage</span></span></a>. | |
| 698 | </p></dd><dt><span class="term"><code class="constant">GL_SAMPLER_BINDING</code></span></dt><dd><p> | |
| 699 | </p><p> | |
| 700 | <em class="parameter"><code>params</code></em> returns a single value, the name of the sampler object | |
| 701 | currently bound to the active texture unit. The initial value is 0. | |
| 702 | See <a href="glBindSampler.xml"><span class="citerefentry"><span class="refentrytitle">glBindSampler</span></span></a>. | |
| 703 | </p></dd><dt><span class="term"><code class="constant">GL_SAMPLES</code></span></dt><dd><p> | |
| 704 | </p><p> | |
| 705 | <em class="parameter"><code>params</code></em> returns a single integer value indicating the coverage mask size. | |
| 706 | See <a href="glSampleCoverage.xml"><span class="citerefentry"><span class="refentrytitle">glSampleCoverage</span></span></a>. | |
| 707 | </p></dd><dt><span class="term"><code class="constant">GL_SCISSOR_BOX</code></span></dt><dd><p> | |
| 708 | </p><p> | |
| 709 | <em class="parameter"><code>params</code></em> returns four values: | |
| 710 | the | |
| 711 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">x</mml:mi></mml:math> | |
| 712 | and | |
| 713 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">y</mml:mi></mml:math> | |
| 714 | window coordinates of the scissor box, | |
| 715 | followed by its width and height. | |
| 716 | Initially the | |
| 717 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">x</mml:mi></mml:math> | |
| 718 | and | |
| 719 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">y</mml:mi></mml:math> | |
| 720 | window coordinates are both 0 and the | |
| 721 | width and height are set to the size of the window. | |
| 722 | See <a href="glScissor.xml"><span class="citerefentry"><span class="refentrytitle">glScissor</span></span></a>. | |
| 723 | </p></dd><dt><span class="term"><code class="constant">GL_SCISSOR_TEST</code></span></dt><dd><p> | |
| 724 | </p><p> | |
| 725 | <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether scissoring is | |
| 726 | enabled. The initial value is <code class="constant">GL_FALSE</code>. | |
| 727 | See <a href="glScissor.xml"><span class="citerefentry"><span class="refentrytitle">glScissor</span></span></a>. | |
| 728 | </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_BACK_FAIL</code></span></dt><dd><p> | |
| 729 | </p><p> | |
| 730 | <em class="parameter"><code>params</code></em> returns one value, | |
| 731 | a symbolic constant indicating what action is taken for back-facing polygons when the stencil | |
| 732 | test fails. The initial value is <code class="constant">GL_KEEP</code>. | |
| 733 | See <a href="glStencilOpSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilOpSeparate</span></span></a>. | |
| 734 | </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_BACK_FUNC</code></span></dt><dd><p> | |
| 735 | </p><p> | |
| 736 | <em class="parameter"><code>params</code></em> returns one value, | |
| 737 | a symbolic constant indicating what function is used for back-facing polygons to compare the | |
| 738 | stencil reference value with the stencil buffer value. The initial value | |
| 739 | is <code class="constant">GL_ALWAYS</code>. | |
| 740 | See <a href="glStencilFuncSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilFuncSeparate</span></span></a>. | |
| 741 | </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_BACK_PASS_DEPTH_FAIL</code></span></dt><dd><p> | |
| 742 | </p><p> | |
| 743 | <em class="parameter"><code>params</code></em> returns one value, | |
| 744 | a symbolic constant indicating what action is taken for back-facing polygons when the stencil | |
| 745 | test passes, | |
| 746 | but the depth test fails. The initial value is <code class="constant">GL_KEEP</code>. | |
| 747 | See <a href="glStencilOpSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilOpSeparate</span></span></a>. | |
| 748 | </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_BACK_PASS_DEPTH_PASS</code></span></dt><dd><p> | |
| 749 | </p><p> | |
| 750 | <em class="parameter"><code>params</code></em> returns one value, | |
| 751 | a symbolic constant indicating what action is taken for back-facing polygons when the stencil | |
| 752 | test passes and the depth test passes. The initial value is <code class="constant">GL_KEEP</code>. | |
| 753 | See <a href="glStencilOpSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilOpSeparate</span></span></a>. | |
| 754 | </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_BACK_REF</code></span></dt><dd><p> | |
| 755 | </p><p> | |
| 756 | <em class="parameter"><code>params</code></em> returns one value, | |
| 757 | the reference value that is compared with the contents of the stencil | |
| 758 | buffer for back-facing polygons. The initial value is 0. | |
| 759 | See <a href="glStencilFuncSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilFuncSeparate</span></span></a>. | |
| 760 | </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_BACK_VALUE_MASK</code></span></dt><dd><p> | |
| 761 | </p><p> | |
| 762 | <em class="parameter"><code>params</code></em> returns one value, | |
| 763 | the mask that is used for back-facing polygons to mask both the stencil reference value and the | |
| 764 | stencil buffer value before they are compared. The initial value is all 1's. | |
| 765 | See <a href="glStencilFuncSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilFuncSeparate</span></span></a>. | |
| 766 | </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_BACK_WRITEMASK</code></span></dt><dd><p> | |
| 767 | </p><p> | |
| 768 | <em class="parameter"><code>params</code></em> returns one value, | |
| 769 | the mask that controls writing of the stencil bitplanes for back-facing polygons. The initial value | |
| 770 | is all 1's. | |
| 771 | See <a href="glStencilMaskSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilMaskSeparate</span></span></a>. | |
| 772 | </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_CLEAR_VALUE</code></span></dt><dd><p> | |
| 773 | </p><p> | |
| 774 | <em class="parameter"><code>params</code></em> returns one value, | |
| 775 | the index to which the stencil bitplanes are cleared. The initial value is | |
| 776 | 0. | |
| 777 | See <a href="glClearStencil.xml"><span class="citerefentry"><span class="refentrytitle">glClearStencil</span></span></a>. | |
| 778 | </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_FAIL</code></span></dt><dd><p> | |
| 779 | </p><p> | |
| 780 | <em class="parameter"><code>params</code></em> returns one value, | |
| 781 | a symbolic constant indicating what action is taken when the stencil | |
| 782 | test fails. The initial value is <code class="constant">GL_KEEP</code>. | |
| 783 | See <a href="glStencilOp.xml"><span class="citerefentry"><span class="refentrytitle">glStencilOp</span></span></a>. | |
| 784 | This stencil state only affects non-polygons | |
| 785 | and front-facing polygons. Back-facing polygons use separate stencil state. | |
| 786 | See <a href="glStencilOpSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilOpSeparate</span></span></a>. | |
| 787 | </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_FUNC</code></span></dt><dd><p> | |
| 788 | </p><p> | |
| 789 | <em class="parameter"><code>params</code></em> returns one value, | |
| 790 | a symbolic constant indicating what function is used to compare the | |
| 791 | stencil reference value with the stencil buffer value. The initial value | |
| 792 | is <code class="constant">GL_ALWAYS</code>. | |
| 793 | See <a href="glStencilFunc.xml"><span class="citerefentry"><span class="refentrytitle">glStencilFunc</span></span></a>. | |
| 794 | This stencil state only affects non-polygons | |
| 795 | and front-facing polygons. Back-facing polygons use separate stencil state. | |
| 796 | See <a href="glStencilFuncSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilFuncSeparate</span></span></a>. | |
| 797 | </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_PASS_DEPTH_FAIL</code></span></dt><dd><p> | |
| 798 | </p><p> | |
| 799 | <em class="parameter"><code>params</code></em> returns one value, | |
| 800 | a symbolic constant indicating what action is taken when the stencil | |
| 801 | test passes, | |
| 802 | but the depth test fails. The initial value is <code class="constant">GL_KEEP</code>. | |
| 803 | See <a href="glStencilOp.xml"><span class="citerefentry"><span class="refentrytitle">glStencilOp</span></span></a>. | |
| 804 | This stencil state only affects non-polygons | |
| 805 | and front-facing polygons. Back-facing polygons use separate stencil state. | |
| 806 | See <a href="glStencilOpSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilOpSeparate</span></span></a>. | |
| 807 | </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_PASS_DEPTH_PASS</code></span></dt><dd><p> | |
| 808 | </p><p> | |
| 809 | <em class="parameter"><code>params</code></em> returns one value, | |
| 810 | a symbolic constant indicating what action is taken when the stencil | |
| 811 | test passes and the depth test passes. The initial value is <code class="constant">GL_KEEP</code>. | |
| 812 | See <a href="glStencilOp.xml"><span class="citerefentry"><span class="refentrytitle">glStencilOp</span></span></a>. | |
| 813 | This stencil state only affects non-polygons | |
| 814 | and front-facing polygons. Back-facing polygons use separate stencil state. | |
| 815 | See <a href="glStencilOpSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilOpSeparate</span></span></a>. | |
| 816 | </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_REF</code></span></dt><dd><p> | |
| 817 | </p><p> | |
| 818 | <em class="parameter"><code>params</code></em> returns one value, | |
| 819 | the reference value that is compared with the contents of the stencil | |
| 820 | buffer. The initial value is 0. | |
| 821 | See <a href="glStencilFunc.xml"><span class="citerefentry"><span class="refentrytitle">glStencilFunc</span></span></a>. | |
| 822 | This stencil state only affects non-polygons | |
| 823 | and front-facing polygons. Back-facing polygons use separate stencil state. | |
| 824 | See <a href="glStencilFuncSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilFuncSeparate</span></span></a>. | |
| 825 | </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_TEST</code></span></dt><dd><p> | |
| 826 | </p><p> | |
| 827 | <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether stencil testing | |
| 828 | of fragments is enabled. The initial value is <code class="constant">GL_FALSE</code>. | |
| 829 | 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>. | |
| 830 | </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_VALUE_MASK</code></span></dt><dd><p> | |
| 831 | </p><p> | |
| 832 | <em class="parameter"><code>params</code></em> returns one value, | |
| 833 | the mask that is used to mask both the stencil reference value and the | |
| 834 | stencil buffer value before they are compared. The initial value is all 1's. | |
| 835 | See <a href="glStencilFunc.xml"><span class="citerefentry"><span class="refentrytitle">glStencilFunc</span></span></a>. | |
| 836 | This stencil state only affects non-polygons | |
| 837 | and front-facing polygons. Back-facing polygons use separate stencil state. | |
| 838 | See <a href="glStencilFuncSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilFuncSeparate</span></span></a>. | |
| 839 | </p></dd><dt><span class="term"><code class="constant">GL_STENCIL_WRITEMASK</code></span></dt><dd><p> | |
| 840 | </p><p> | |
| 841 | <em class="parameter"><code>params</code></em> returns one value, | |
| 842 | the mask that controls writing of the stencil bitplanes. The initial value | |
| 843 | is all 1's. | |
| 844 | See <a href="glStencilMask.xml"><span class="citerefentry"><span class="refentrytitle">glStencilMask</span></span></a>. | |
| 845 | This stencil state only affects non-polygons | |
| 846 | and front-facing polygons. Back-facing polygons use separate stencil state. | |
| 847 | See <a href="glStencilMaskSeparate.xml"><span class="citerefentry"><span class="refentrytitle">glStencilMaskSeparate</span></span></a>. | |
| 848 | </p></dd><dt><span class="term"><code class="constant">GL_STEREO</code></span></dt><dd><p> | |
| 849 | </p><p> | |
| 850 | <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether stereo buffers | |
| 851 | (left and right) are supported. | |
| 852 | </p></dd><dt><span class="term"><code class="constant">GL_SUBPIXEL_BITS</code></span></dt><dd><p> | |
| 853 | </p><p> | |
| 854 | <em class="parameter"><code>params</code></em> returns one value, | |
| 855 | an estimate of the number of bits of subpixel resolution that are used to | |
| 856 | position rasterized geometry in window coordinates. The value must be at least 4. | |
| 857 | </p></dd><dt><span class="term"><code class="constant">GL_TEXTURE_BINDING_1D</code></span></dt><dd><p> | |
| 858 | </p><p> | |
| 859 | <em class="parameter"><code>params</code></em> returns a single value, the name of the texture | |
| 860 | currently bound to the target <code class="constant">GL_TEXTURE_1D</code>. The initial value is 0. | |
| 861 | See <a href="glBindTexture.xml"><span class="citerefentry"><span class="refentrytitle">glBindTexture</span></span></a>. | |
| 862 | </p></dd><dt><span class="term"><code class="constant">GL_TEXTURE_BINDING_1D_ARRAY</code></span></dt><dd><p> | |
| 863 | </p><p> | |
| 864 | <em class="parameter"><code>params</code></em> returns a single value, the name of the texture | |
| 865 | currently bound to the target <code class="constant">GL_TEXTURE_1D_ARRAY</code>. The initial value is 0. | |
| 866 | See <a href="glBindTexture.xml"><span class="citerefentry"><span class="refentrytitle">glBindTexture</span></span></a>. | |
| 867 | </p></dd><dt><span class="term"><code class="constant">GL_TEXTURE_BINDING_2D</code></span></dt><dd><p> | |
| 868 | </p><p> | |
| 869 | <em class="parameter"><code>params</code></em> returns a single value, the name of the texture | |
| 870 | currently bound to the target <code class="constant">GL_TEXTURE_2D</code>. The initial value is 0. | |
| 871 | See <a href="glBindTexture.xml"><span class="citerefentry"><span class="refentrytitle">glBindTexture</span></span></a>. | |
| 872 | </p></dd><dt><span class="term"><code class="constant">GL_TEXTURE_BINDING_2D_ARRAY</code></span></dt><dd><p> | |
| 873 | </p><p> | |
| 874 | <em class="parameter"><code>params</code></em> returns a single value, the name of the texture | |
| 875 | currently bound to the target <code class="constant">GL_TEXTURE_2D_ARRAY</code>. The initial value is 0. | |
| 876 | See <a href="glBindTexture.xml"><span class="citerefentry"><span class="refentrytitle">glBindTexture</span></span></a>. | |
| 877 | </p></dd><dt><span class="term"><code class="constant">GL_TEXTURE_BINDING_2D_MULTISAMPLE</code></span></dt><dd><p> | |
| 878 | </p><p> | |
| 879 | <em class="parameter"><code>params</code></em> returns a single value, the name of the texture | |
| 880 | currently bound to the target <code class="constant">GL_TEXTURE_2D_MULTISAMPLE</code>. The initial value is 0. | |
| 881 | See <a href="glBindTexture.xml"><span class="citerefentry"><span class="refentrytitle">glBindTexture</span></span></a>. | |
| 882 | </p></dd><dt><span class="term"><code class="constant">GL_TEXTURE_BINDING_2D_MULTISAMPLE_ARRAY</code></span></dt><dd><p> | |
| 883 | </p><p> | |
| 884 | <em class="parameter"><code>params</code></em> returns a single value, the name of the texture | |
| 885 | currently bound to the target <code class="constant">GL_TEXTURE_2D_MULTISAMPLE_ARRAY</code>. The initial value is 0. | |
| 886 | See <a href="glBindTexture.xml"><span class="citerefentry"><span class="refentrytitle">glBindTexture</span></span></a>. | |
| 887 | </p></dd><dt><span class="term"><code class="constant">GL_TEXTURE_BINDING_3D</code></span></dt><dd><p> | |
| 888 | </p><p> | |
| 889 | <em class="parameter"><code>params</code></em> returns a single value, the name of the texture | |
| 890 | currently bound to the target <code class="constant">GL_TEXTURE_3D</code>. The initial value is 0. | |
| 891 | See <a href="glBindTexture.xml"><span class="citerefentry"><span class="refentrytitle">glBindTexture</span></span></a>. | |
| 892 | </p></dd><dt><span class="term"><code class="constant">GL_TEXTURE_BINDING_BUFFER</code></span></dt><dd><p> | |
| 893 | </p><p> | |
| 894 | <em class="parameter"><code>params</code></em> returns a single value, the name of the texture | |
| 895 | currently bound to the target <code class="constant">GL_TEXTURE_BUFFER</code>. The initial value is 0. | |
| 896 | See <a href="glBindTexture.xml"><span class="citerefentry"><span class="refentrytitle">glBindTexture</span></span></a>. | |
| 897 | </p></dd><dt><span class="term"><code class="constant">GL_TEXTURE_BINDING_CUBE_MAP</code></span></dt><dd><p> | |
| 898 | </p><p> | |
| 899 | <em class="parameter"><code>params</code></em> returns a single value, the name of the texture | |
| 900 | currently bound to the target <code class="constant">GL_TEXTURE_CUBE_MAP</code>. The initial value is 0. | |
| 901 | See <a href="glBindTexture.xml"><span class="citerefentry"><span class="refentrytitle">glBindTexture</span></span></a>. | |
| 902 | </p></dd><dt><span class="term"><code class="constant">GL_TEXTURE_BINDING_RECTANGLE</code></span></dt><dd><p> | |
| 903 | </p><p> | |
| 904 | <em class="parameter"><code>params</code></em> returns a single value, the name of the texture | |
| 905 | currently bound to the target <code class="constant">GL_TEXTURE_RECTANGLE</code>. The initial value is 0. | |
| 906 | See <a href="glBindTexture.xml"><span class="citerefentry"><span class="refentrytitle">glBindTexture</span></span></a>. | |
| 907 | </p></dd><dt><span class="term"><code class="constant">GL_TEXTURE_COMPRESSION_HINT</code></span></dt><dd><p> | |
| 908 | </p><p> | |
| 909 | <em class="parameter"><code>params</code></em> returns a single value indicating the mode of the texture | |
| 910 | compression hint. The initial value is <code class="constant">GL_DONT_CARE</code>. | |
| c7b31271 | 911 | </p></dd><dt><span class="term"><code class="constant">GL_TEXTURE_BINDING_BUFFER</code></span></dt><dd><p> |
| 7faf1d71 AW |
912 | </p><p> |
| 913 | <em class="parameter"><code>params</code></em> returns a single value, the name of the texture buffer object | |
| 914 | currently bound. The initial value is 0. | |
| 915 | See <a href="glBindBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glBindBuffer</span></span></a>. | |
| 916 | </p></dd><dt><span class="term"><code class="constant">GL_TIMESTAMP</code></span></dt><dd><p> | |
| 917 | </p><p> | |
| 918 | <em class="parameter"><code>params</code></em> returns a single value, the 64-bit value of the current | |
| 919 | GL time. | |
| 920 | See <a href="glQueryCounter.xml"><span class="citerefentry"><span class="refentrytitle">glQueryCounter</span></span></a>. | |
| 921 | </p></dd><dt><span class="term"><code class="constant">GL_TRANSFORM_FEEDBACK_BUFFER_BINDING</code></span></dt><dd><p> | |
| 922 | </p><p> | |
| 923 | When used with non-indexed variants of <code class="function">glGet</code> (such as <code class="function">glGetIntegerv</code>), | |
| 924 | <em class="parameter"><code>params</code></em> returns a single value, the name of the buffer object | |
| 925 | currently bound to the target <code class="constant">GL_TRANSFORM_FEEDBACK_BUFFER</code>. If no buffer object | |
| 926 | is bound to this target, 0 is returned. | |
| 927 | When used with indexed variants of <code class="function">glGet</code> (such as <code class="function">glGetIntegeri_v</code>), | |
| 928 | <em class="parameter"><code>params</code></em> returns a single value, the name of the buffer object | |
| 929 | bound to the indexed transform feedback attribute stream. The initial value is 0 for all targets. | |
| 930 | 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 | |
| 931 | <a href="glBindBufferRange.xml"><span class="citerefentry"><span class="refentrytitle">glBindBufferRange</span></span></a>. | |
| 932 | </p></dd><dt><span class="term"><code class="constant">GL_TRANSFORM_FEEDBACK_BUFFER_START</code></span></dt><dd><p> | |
| 933 | </p><p> | |
| 934 | When used with indexed variants of <code class="function">glGet</code> (such as <code class="function">glGetInteger64i_v</code>), | |
| 935 | <em class="parameter"><code>params</code></em> returns a single value, the start offset of the binding range for each | |
| 936 | transform feedback attribute stream. The initial value is 0 for all streams. | |
| 937 | See <a href="glBindBufferRange.xml"><span class="citerefentry"><span class="refentrytitle">glBindBufferRange</span></span></a>. | |
| 938 | </p></dd><dt><span class="term"><code class="constant">GL_TRANSFORM_FEEDBACK_BUFFER_SIZE</code></span></dt><dd><p> | |
| 939 | </p><p> | |
| 940 | When used with indexed variants of <code class="function">glGet</code> (such as <code class="function">glGetInteger64i_v</code>), | |
| 941 | <em class="parameter"><code>params</code></em> returns a single value, the size of the binding range for each | |
| 942 | transform feedback attribute stream. The initial value is 0 for all streams. | |
| 943 | See <a href="glBindBufferRange.xml"><span class="citerefentry"><span class="refentrytitle">glBindBufferRange</span></span></a>. | |
| 944 | </p></dd><dt><span class="term"><code class="constant">GL_UNIFORM_BUFFER_BINDING</code></span></dt><dd><p> | |
| 945 | </p><p> | |
| 946 | When used with non-indexed variants of <code class="function">glGet</code> (such as <code class="function">glGetIntegerv</code>), | |
| 947 | <em class="parameter"><code>params</code></em> returns a single value, the name of the buffer object | |
| 948 | currently bound to the target <code class="constant">GL_UNIFORM_BUFFER</code>. If no buffer object | |
| 949 | is bound to this target, 0 is returned. | |
| 950 | When used with indexed variants of <code class="function">glGet</code> (such as <code class="function">glGetIntegeri_v</code>), | |
| 951 | <em class="parameter"><code>params</code></em> returns a single value, the name of the buffer object | |
| 952 | bound to the indexed uniform buffer binding point. The initial value is 0 for all targets. | |
| 953 | 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 | |
| 954 | <a href="glBindBufferRange.xml"><span class="citerefentry"><span class="refentrytitle">glBindBufferRange</span></span></a>. | |
| 955 | </p></dd><dt><span class="term"><code class="constant">GL_UNIFORM_BUFFER_START</code></span></dt><dd><p> | |
| 956 | </p><p> | |
| 957 | When used with indexed variants of <code class="function">glGet</code> (such as <code class="function">glGetInteger64i_v</code>), | |
| 958 | <em class="parameter"><code>params</code></em> returns a single value, the start offset of the binding range for each | |
| 959 | indexed uniform buffer binding. The initial value is 0 for all bindings. | |
| 960 | See <a href="glBindBufferRange.xml"><span class="citerefentry"><span class="refentrytitle">glBindBufferRange</span></span></a>. | |
| 961 | </p></dd><dt><span class="term"><code class="constant">GL_UNIFORM_BUFFER_SIZE</code></span></dt><dd><p> | |
| 962 | </p><p> | |
| 963 | When used with indexed variants of <code class="function">glGet</code> (such as <code class="function">glGetInteger64i_v</code>), | |
| 964 | <em class="parameter"><code>params</code></em> returns a single value, the size of the binding range for each | |
| 965 | indexed uniform buffer binding. The initial value is 0 for all bindings. | |
| 966 | See <a href="glBindBufferRange.xml"><span class="citerefentry"><span class="refentrytitle">glBindBufferRange</span></span></a>. | |
| 967 | </p></dd><dt><span class="term"><code class="constant">GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT</code></span></dt><dd><p> | |
| 968 | </p><p> | |
| 969 | <em class="parameter"><code>params</code></em> returns a single value, the minimum required alignment | |
| 970 | for uniform buffer sizes and offset. The initial value is 1. | |
| 971 | See <a href="glUniformBlockBinding.xml"><span class="citerefentry"><span class="refentrytitle">glUniformBlockBinding</span></span></a>. | |
| 972 | </p></dd><dt><span class="term"><code class="constant">GL_UNPACK_ALIGNMENT</code></span></dt><dd><p> | |
| 973 | </p><p> | |
| 974 | <em class="parameter"><code>params</code></em> returns one value, | |
| 975 | the byte alignment used for reading pixel data from memory. The initial | |
| 976 | value is 4. | |
| 977 | See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>. | |
| 978 | </p></dd><dt><span class="term"><code class="constant">GL_UNPACK_IMAGE_HEIGHT</code></span></dt><dd><p> | |
| 979 | </p><p> | |
| 980 | <em class="parameter"><code>params</code></em> returns one value, | |
| 981 | the image height used for reading pixel data from memory. The initial | |
| 982 | is 0. | |
| 983 | See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>. | |
| 984 | </p></dd><dt><span class="term"><code class="constant">GL_UNPACK_LSB_FIRST</code></span></dt><dd><p> | |
| 985 | </p><p> | |
| 986 | <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether single-bit | |
| 987 | pixels being read from memory are read first from the least significant | |
| 988 | bit of each unsigned byte. The initial value is <code class="constant">GL_FALSE</code>. | |
| 989 | See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>. | |
| 990 | </p></dd><dt><span class="term"><code class="constant">GL_UNPACK_ROW_LENGTH</code></span></dt><dd><p> | |
| 991 | </p><p> | |
| 992 | <em class="parameter"><code>params</code></em> returns one value, | |
| 993 | the row length used for reading pixel data from memory. The initial value | |
| 994 | is 0. | |
| 995 | See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>. | |
| 996 | </p></dd><dt><span class="term"><code class="constant">GL_UNPACK_SKIP_IMAGES</code></span></dt><dd><p> | |
| 997 | </p><p> | |
| 998 | <em class="parameter"><code>params</code></em> returns one value, | |
| 999 | the number of pixel images skipped before the first pixel is read | |
| 1000 | from memory. The initial value is 0. | |
| 1001 | See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>. | |
| 1002 | </p></dd><dt><span class="term"><code class="constant">GL_UNPACK_SKIP_PIXELS</code></span></dt><dd><p> | |
| 1003 | </p><p> | |
| 1004 | <em class="parameter"><code>params</code></em> returns one value, | |
| 1005 | the number of pixel locations skipped before the first pixel is read | |
| 1006 | from memory. The initial value is 0. | |
| 1007 | See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>. | |
| 1008 | </p></dd><dt><span class="term"><code class="constant">GL_UNPACK_SKIP_ROWS</code></span></dt><dd><p> | |
| 1009 | </p><p> | |
| 1010 | <em class="parameter"><code>params</code></em> returns one value, | |
| 1011 | the number of rows of pixel locations skipped before the first pixel is read | |
| 1012 | from memory. The initial value is 0. | |
| 1013 | See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>. | |
| 1014 | </p></dd><dt><span class="term"><code class="constant">GL_UNPACK_SWAP_BYTES</code></span></dt><dd><p> | |
| 1015 | </p><p> | |
| 1016 | <em class="parameter"><code>params</code></em> returns a single boolean value indicating whether the bytes of | |
| 1017 | two-byte and four-byte pixel indices and components are swapped after being | |
| 1018 | read from memory. The initial value is <code class="constant">GL_FALSE</code>. | |
| 1019 | See <a href="glPixelStore.xml"><span class="citerefentry"><span class="refentrytitle">glPixelStore</span></span></a>. | |
| 1020 | </p></dd><dt><span class="term"><code class="constant">GL_NUM_EXTENSIONS</code></span></dt><dd><p> | |
| 1021 | </p><p> | |
| 1022 | <em class="parameter"><code>params</code></em> returns one value, | |
| 1023 | the number of extensions supported by the GL implementation for the current context. | |
| 1024 | See <a href="glGetString.xml"><span class="citerefentry"><span class="refentrytitle">glGetString</span></span></a>. | |
| 1025 | </p></dd><dt><span class="term"><code class="constant">GL_MAJOR_VERSION</code></span></dt><dd><p> | |
| 1026 | </p><p> | |
| 1027 | <em class="parameter"><code>params</code></em> returns one value, | |
| 1028 | the major version number of the OpenGL API supported by the current context. | |
| 1029 | </p></dd><dt><span class="term"><code class="constant">GL_MINOR_VERSION</code></span></dt><dd><p> | |
| 1030 | </p><p> | |
| 1031 | <em class="parameter"><code>params</code></em> returns one value, | |
| 1032 | the minor version number of the OpenGL API supported by the current context. | |
| 1033 | </p></dd><dt><span class="term"><code class="constant">GL_CONTEXT_FLAGS</code></span></dt><dd><p> | |
| 1034 | </p><p> | |
| 1035 | <em class="parameter"><code>params</code></em> returns one value, | |
| 1036 | the flags with which the context was created (such as debugging functionality). | |
| 7faf1d71 AW |
1037 | </p></dd><dt><span class="term"><code class="constant">GL_VIEWPORT</code></span></dt><dd><p> |
| 1038 | </p><p> | |
| 1039 | <em class="parameter"><code>params</code></em> returns four values: | |
| 1040 | the | |
| 1041 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">x</mml:mi></mml:math> | |
| 1042 | and | |
| 1043 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">y</mml:mi></mml:math> | |
| 1044 | window coordinates of the viewport, | |
| 1045 | followed by its width and height. | |
| 1046 | Initially the | |
| 1047 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">x</mml:mi></mml:math> | |
| 1048 | and | |
| 1049 | <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:mi mathvariant="italic">y</mml:mi></mml:math> | |
| 1050 | window coordinates are both set to 0, | |
| 1051 | and the width and height are set to the width and height of the window into | |
| 1052 | which the GL will do its rendering. | |
| 1053 | See <a href="glViewport.xml"><span class="citerefentry"><span class="refentrytitle">glViewport</span></span></a>. | |
| 1054 | </p></dd></dl></div><p> | |
| 1055 | Many of the boolean parameters can also be queried more easily using | |
| 1056 | <a href="glIsEnabled.xml"><span class="citerefentry"><span class="refentrytitle">glIsEnabled</span></span></a>. | |
| 1057 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="notes"></a><h2>Notes</h2><p> | |
| 1058 | The following parameters return the associated value for the active texture unit: | |
| 1059 | <code class="constant">GL_TEXTURE_1D</code>, <code class="constant">GL_TEXTURE_BINDING_1D</code>, | |
| 1060 | <code class="constant">GL_TEXTURE_2D</code>, <code class="constant">GL_TEXTURE_BINDING_2D</code>, | |
| 1061 | <code class="constant">GL_TEXTURE_3D</code> and <code class="constant">GL_TEXTURE_BINDING_3D</code>. | |
| 1062 | </p><p> | |
| 1063 | <code class="constant">GL_MAX_RECTANGLE_TEXTURE_SIZE</code>, <code class="constant">GL_MAX_TEXTURE_BUFFER_SIZE</code>, | |
| c7b31271 | 1064 | <code class="constant">GL_UNIFORM_BUFFER_BINDING</code>, <code class="constant">GL_TEXTURE_BINDING_BUFFER</code>, |
| 7faf1d71 AW |
1065 | <code class="constant">GL_MAX_VERTEX_UNIFORM_BLOCKS</code>, <code class="constant">GL_MAX_FRAGMENT_UNIFORM_BLOCKS</code>, |
| 1066 | <code class="constant">GL_MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS</code>, <code class="constant">GL_MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS</code> | |
| 1067 | <code class="constant">GL_MAX_COMBINED_UNIFORM_BLOCKS</code>, <code class="constant">GL_MAX_UNIFORM_BLOCK_SIZE</code>, | |
| 1068 | and <code class="constant">GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT</code> | |
| 1069 | are available only if the GL version is 3.1 or greater. | |
| 1070 | </p><p> | |
| 1071 | <code class="constant">GL_MAX_COMBINED_GEOMETRY_UNIFORM_COMPONENTS</code>, <code class="constant">GL_MAX_GEOMETRY_UNIFORM_BLOCKS</code>, | |
| 1072 | <code class="constant">GL_MAX_GEOMETRY_INPUT_COMPONENTS</code>, <code class="constant">GL_MAX_GEOMETRY_OUTPUT_COMPONENTS</code>, | |
| 1073 | <code class="constant">GL_MAX_GEOMETRY_OUTPUT_VERTICES</code>, <code class="constant">GL_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS</code> and | |
| 1074 | <code class="constant">GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS</code> are available only if the GL version is 3.2 or greater. | |
| 1075 | </p><p> | |
| 1076 | <code class="function">glGetInteger64v</code> and <code class="function">glGetInteger64i_v</code> are available only if | |
| 1077 | the GL version is 3.2 or greater. | |
| 1078 | </p><p> | |
| c7b31271 | 1079 | <code class="constant">GL_MAX_DUAL_SOURCE_DRAW_BUFFERS</code>, <code class="constant">GL_SAMPLER_BINDING</code>, and |
| 7faf1d71 AW |
1080 | <code class="constant">GL_TIMESTAMP</code> are available only if the GL version is 3.3 or greater. |
| 1081 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="errors"></a><h2>Errors</h2><p> | |
| 1082 | <code class="constant">GL_INVALID_ENUM</code> is generated if <em class="parameter"><code>pname</code></em> is not an accepted value. | |
| 1083 | </p><p> | |
| 1084 | <code class="constant">GL_INVALID_VALUE</code> is generated on any of <code class="function">glGetBooleani_v</code>, | |
| 1085 | <code class="function">glGetIntegeri_v</code>, or <code class="function">glGetInteger64i_v</code> if | |
| 1086 | <em class="parameter"><code>index</code></em> is outside of the valid range for the indexed state <em class="parameter"><code>target</code></em>. | |
| 1087 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p> | |
| 1088 | <a href="glGetActiveUniform.xml"><span class="citerefentry"><span class="refentrytitle">glGetActiveUniform</span></span></a>, | |
| 1089 | <a href="glGetAttachedShaders.xml"><span class="citerefentry"><span class="refentrytitle">glGetAttachedShaders</span></span></a>, | |
| 1090 | <a href="glGetAttribLocation.xml"><span class="citerefentry"><span class="refentrytitle">glGetAttribLocation</span></span></a>, | |
| 1091 | <a href="glGetBufferParameter.xml"><span class="citerefentry"><span class="refentrytitle">glGetBufferParameter</span></span></a>, | |
| 1092 | <a href="glGetBufferPointerv.xml"><span class="citerefentry"><span class="refentrytitle">glGetBufferPointerv</span></span></a>, | |
| 1093 | <a href="glGetBufferSubData.xml"><span class="citerefentry"><span class="refentrytitle">glGetBufferSubData</span></span></a>, | |
| 1094 | <a href="glGetCompressedTexImage.xml"><span class="citerefentry"><span class="refentrytitle">glGetCompressedTexImage</span></span></a>, | |
| 1095 | <a href="glGetError.xml"><span class="citerefentry"><span class="refentrytitle">glGetError</span></span></a>, | |
| 1096 | <a href="glGetProgram.xml"><span class="citerefentry"><span class="refentrytitle">glGetProgram</span></span></a>, | |
| 1097 | <a href="glGetProgramInfoLog.xml"><span class="citerefentry"><span class="refentrytitle">glGetProgramInfoLog</span></span></a>, | |
| 1098 | <a href="glGetQueryiv.xml"><span class="citerefentry"><span class="refentrytitle">glGetQueryiv</span></span></a>, | |
| 1099 | <a href="glGetQueryObject.xml"><span class="citerefentry"><span class="refentrytitle">glGetQueryObject</span></span></a>, | |
| 1100 | <a href="glGetShader.xml"><span class="citerefentry"><span class="refentrytitle">glGetShader</span></span></a>, | |
| 1101 | <a href="glGetShaderInfoLog.xml"><span class="citerefentry"><span class="refentrytitle">glGetShaderInfoLog</span></span></a>, | |
| 1102 | <a href="glGetShaderSource.xml"><span class="citerefentry"><span class="refentrytitle">glGetShaderSource</span></span></a>, | |
| 1103 | <a href="glGetString.xml"><span class="citerefentry"><span class="refentrytitle">glGetString</span></span></a>, | |
| 1104 | <a href="glGetTexImage.xml"><span class="citerefentry"><span class="refentrytitle">glGetTexImage</span></span></a>, | |
| 1105 | <a href="glGetTexLevelParameter.xml"><span class="citerefentry"><span class="refentrytitle">glGetTexLevelParameter</span></span></a>, | |
| 1106 | <a href="glGetTexParameter.xml"><span class="citerefentry"><span class="refentrytitle">glGetTexParameter</span></span></a>, | |
| 1107 | <a href="glGetUniform.xml"><span class="citerefentry"><span class="refentrytitle">glGetUniform</span></span></a>, | |
| 1108 | <a href="glGetUniformLocation.xml"><span class="citerefentry"><span class="refentrytitle">glGetUniformLocation</span></span></a>, | |
| 1109 | <a href="glGetVertexAttrib.xml"><span class="citerefentry"><span class="refentrytitle">glGetVertexAttrib</span></span></a>, | |
| 1110 | <a href="glGetVertexAttribPointerv.xml"><span class="citerefentry"><span class="refentrytitle">glGetVertexAttribPointerv</span></span></a>, | |
| 1111 | <a href="glIsEnabled.xml"><span class="citerefentry"><span class="refentrytitle">glIsEnabled</span></span></a> | |
| 1112 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="Copyright"></a><h2>Copyright</h2><p> | |
| 1113 | Copyright <span class="trademark"></span>© 1991-2006 | |
| 1114 | Silicon Graphics, Inc. This document is licensed under the SGI | |
| 1115 | Free Software B License. For details, see | |
| 1116 | <a href="http://oss.sgi.com/projects/FreeB/" target="_top">http://oss.sgi.com/projects/FreeB/</a>. | |
| 1117 | </p></div></div></body></html> |