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