HCoop / clinton / guile-figl.git / blame
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1 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "xhtml1-transitional.dtd"> |
| 2 | <!-- saved from url=(0013)about:internet --> | |
| 3 | <?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" /><title>glGetPointerv</title><meta name="generator" content="DocBook XSL Stylesheets V1.73.2" /></head><body><div class="refentry" lang="en" xml:lang="en"><a id="glGetPointerv"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>glGetPointerv — return the address of the specified pointer</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">glGetPointerv</b>(</code></td><td>GLenum </td><td><var class="pdparam">pname</var>, </td></tr><tr><td> </td><td>GLvoid ** </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> | |
| 4 | Specifies the array or buffer pointer to be returned. | |
| 5 | Symbolic constants | |
| 6 | <code class="constant">GL_COLOR_ARRAY_POINTER</code>, | |
| 7 | <code class="constant">GL_EDGE_FLAG_ARRAY_POINTER</code>, | |
| 8 | <code class="constant">GL_FOG_COORD_ARRAY_POINTER</code>, | |
| 9 | <code class="constant">GL_FEEDBACK_BUFFER_POINTER</code>, | |
| 10 | <code class="constant">GL_INDEX_ARRAY_POINTER</code>, | |
| 11 | <code class="constant">GL_NORMAL_ARRAY_POINTER</code>, | |
| 12 | <code class="constant">GL_SECONDARY_COLOR_ARRAY_POINTER</code>, | |
| 13 | <code class="constant">GL_SELECTION_BUFFER_POINTER</code>, | |
| 14 | <code class="constant">GL_TEXTURE_COORD_ARRAY_POINTER</code>, | |
| 15 | or | |
| 16 | <code class="constant">GL_VERTEX_ARRAY_POINTER</code> | |
| 17 | are accepted. | |
| 18 | </p></dd><dt><span class="term"><em class="parameter"><code>params</code></em></span></dt><dd><p> | |
| 19 | Returns the pointer value specified by <em class="parameter"><code>pname</code></em>. | |
| 20 | </p></dd></dl></div></div><div class="refsect1" lang="en" xml:lang="en"><a id="description"></a><h2>Description</h2><p> | |
| 21 | <code class="function">glGetPointerv</code> returns pointer information. <em class="parameter"><code>pname</code></em> is a symbolic constant | |
| 22 | indicating the pointer to be returned, and <em class="parameter"><code>params</code></em> is a pointer to a | |
| 23 | location in which to place the returned data. | |
| 24 | </p><p> | |
| 25 | For all <em class="parameter"><code>pname</code></em> arguments except <code class="constant">GL_FEEDBACK_BUFFER_POINTER</code> and <code class="constant">GL_SELECTION_BUFFER_POINTER</code>, | |
| 26 | if a non-zero named buffer object was bound to the <code class="constant">GL_ARRAY_BUFFER</code> target | |
| 27 | (see <a class="citerefentry" href="glBindBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glBindBuffer</span></span></a>) when the desired pointer was previously | |
| 28 | specified, the pointer returned is a byte offset into the buffer object's data store. | |
| 29 | Buffer objects are only available in OpenGL versions 1.5 and greater. | |
| 30 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="notes"></a><h2>Notes</h2><p> | |
| 31 | <code class="function">glGetPointerv</code> is available only if the GL version is 1.1 or greater. | |
| 32 | </p><p> | |
| 33 | <code class="constant">GL_FOG_COORD_ARRAY_POINTER</code> and <code class="constant">GL_SECONDARY_COLOR_ARRAY_POINTER</code> | |
| 34 | are available only if the GL version is 1.4 or greater. | |
| 35 | </p><p> | |
| 36 | The pointers are all client-side state. | |
| 37 | </p><p> | |
| 38 | The initial value for each pointer is 0. | |
| 39 | </p><p> | |
| 40 | For OpenGL versions 1.3 and greater, or when the <code class="code">ARB_multitexture</code> | |
| 41 | extension is supported, querying the <code class="constant">GL_TEXTURE_COORD_ARRAY_POINTER</code> | |
| 42 | returns the value for the active client texture unit. | |
| 43 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="errors"></a><h2>Errors</h2><p> | |
| 44 | <code class="constant">GL_INVALID_ENUM</code> is generated if <em class="parameter"><code>pname</code></em> is not an accepted value. | |
| 45 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="seealso"></a><h2>See Also</h2><p> | |
| 46 | <a class="citerefentry" href="glBindBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glBindBuffer</span></span></a>, | |
| 47 | <a class="citerefentry" href="glClientActiveTexture.xml"><span class="citerefentry"><span class="refentrytitle">glClientActiveTexture</span></span></a>, | |
| 48 | <a class="citerefentry" href="glColorPointer.xml"><span class="citerefentry"><span class="refentrytitle">glColorPointer</span></span></a>, | |
| 49 | <a class="citerefentry" href="glEdgeFlagPointer.xml"><span class="citerefentry"><span class="refentrytitle">glEdgeFlagPointer</span></span></a>, | |
| 50 | <a class="citerefentry" href="glFogCoordPointer.xml"><span class="citerefentry"><span class="refentrytitle">glFogCoordPointer</span></span></a>, | |
| 51 | <a class="citerefentry" href="glFeedbackBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glFeedbackBuffer</span></span></a>, | |
| 52 | <a class="citerefentry" href="glGetVertexAttribPointerv.xml"><span class="citerefentry"><span class="refentrytitle">glGetVertexAttribPointerv</span></span></a>, | |
| 53 | <a class="citerefentry" href="glIndexPointer.xml"><span class="citerefentry"><span class="refentrytitle">glIndexPointer</span></span></a>, | |
| 54 | <a class="citerefentry" href="glNormalPointer.xml"><span class="citerefentry"><span class="refentrytitle">glNormalPointer</span></span></a>, | |
| 55 | <a class="citerefentry" href="glSecondaryColorPointer.xml"><span class="citerefentry"><span class="refentrytitle">glSecondaryColorPointer</span></span></a>, | |
| 56 | <a class="citerefentry" href="glSelectBuffer.xml"><span class="citerefentry"><span class="refentrytitle">glSelectBuffer</span></span></a>, | |
| 57 | <a class="citerefentry" href="glTexCoordPointer.xml"><span class="citerefentry"><span class="refentrytitle">glTexCoordPointer</span></span></a>, | |
| 58 | <a class="citerefentry" href="glVertexAttribPointer.xml"><span class="citerefentry"><span class="refentrytitle">glVertexAttribPointer</span></span></a>, | |
| 59 | <a class="citerefentry" href="glVertexPointer.xml"><span class="citerefentry"><span class="refentrytitle">glVertexPointer</span></span></a> | |
| 60 | </p></div><div class="refsect1" lang="en" xml:lang="en"><a id="Copyright"></a><h2>Copyright</h2><p> | |
| 61 | Copyright <span class="trademark"></span>© 1991-2006 | |
| 62 | Silicon Graphics, Inc. This document is licensed under the SGI | |
| 63 | Free Software B License. For details, see | |
| 64 | <a class="ulink" href="http://oss.sgi.com/projects/FreeB/" target="_top">http://oss.sgi.com/projects/FreeB/</a>. | |
| 65 | </p></div></div></body></html> |