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>glEdgeFlagPointer
</title><meta name=
"generator" content=
"DocBook XSL Stylesheets V1.73.2" /></head><body><div class=
"refentry" lang=
"en" xml:
lang=
"en"><a id=
"glEdgeFlagPointer"></a><div class=
"titlepage"></div><div class=
"refnamediv"><h2>Name
</h2><p>glEdgeFlagPointer — define an array of edge flags
</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">glEdgeFlagPointer
</b>(
</code></td><td>GLsizei
</td><td><var class=
"pdparam">stride
</var>,
</td></tr><tr><td> </td><td>const GLvoid *
</td><td><var class=
"pdparam">pointer
</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>stride
</code></em></span></dt><dd><p>
4 Specifies the byte offset between consecutive edge flags.
5 If
<em class=
"parameter"><code>stride
</code></em> is
0, the edge flags are understood
6 to be tightly packed in the array. The initial value is
0.
7 </p></dd><dt><span class=
"term"><em class=
"parameter"><code>pointer
</code></em></span></dt><dd><p>
8 Specifies a pointer to the first edge flag in the array. The initial
10 </p></dd></dl></div></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"description"></a><h2>Description
</h2><p>
11 <code class=
"function">glEdgeFlagPointer
</code> specifies the location and data format of an array of boolean edge
12 flags to use when rendering.
<em class=
"parameter"><code>stride
</code></em> specifies the byte stride from one
13 edge flag to the next, allowing vertices and attributes
14 to be packed into a single array or stored in separate arrays.
16 If a non-zero named buffer object is bound to the
<code class=
"constant">GL_ARRAY_BUFFER
</code> target
17 (see
<a class=
"citerefentry" href=
"glBindBuffer.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glBindBuffer
</span></span></a>) while an edge flag array is
18 specified,
<em class=
"parameter"><code>pointer
</code></em> is treated as a byte offset into the buffer object's data store.
19 Also, the buffer object binding (
<code class=
"constant">GL_ARRAY_BUFFER_BINDING
</code>) is saved as edge flag vertex array
20 client-side state (
<code class=
"constant">GL_EDGE_FLAG_ARRAY_BUFFER_BINDING
</code>).
22 When an edge flag array is
23 specified,
<em class=
"parameter"><code>stride
</code></em> and
<em class=
"parameter"><code>pointer
</code></em> are saved as client-side
24 state, in addition to the current vertex array buffer object binding.
26 To enable and disable the edge flag array, call
27 <a class=
"citerefentry" href=
"glEnableClientState.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glEnableClientState
</span></span></a> and
<a class=
"citerefentry" href=
"glDisableClientState.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glDisableClientState
</span></span></a> with the argument
28 <code class=
"constant">GL_EDGE_FLAG_ARRAY
</code>. If
29 enabled, the edge flag array is used
30 when
<a class=
"citerefentry" href=
"glDrawArrays.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glDrawArrays
</span></span></a>,
<a class=
"citerefentry" href=
"glMultiDrawArrays.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glMultiDrawArrays
</span></span></a>,
<a class=
"citerefentry" href=
"glDrawElements.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glDrawElements
</span></span></a>,
31 <a class=
"citerefentry" href=
"glMultiDrawElements.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glMultiDrawElements
</span></span></a>,
<a class=
"citerefentry" href=
"glDrawRangeElements.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glDrawRangeElements
</span></span></a>, or
32 <a class=
"citerefentry" href=
"glArrayElement.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glArrayElement
</span></span></a> is called.
33 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"notes"></a><h2>Notes
</h2><p>
34 <code class=
"function">glEdgeFlagPointer
</code> is available only if the GL version is
1.1 or greater.
36 Edge flags are not supported for interleaved vertex array formats
37 (see
<a class=
"citerefentry" href=
"glInterleavedArrays.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glInterleavedArrays
</span></span></a>).
39 The edge flag array is initially disabled and isn't accessed when
40 <a class=
"citerefentry" href=
"glArrayElement.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glArrayElement
</span></span></a>,
<a class=
"citerefentry" href=
"glDrawElements.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glDrawElements
</span></span></a>,
<a class=
"citerefentry" href=
"glDrawRangeElements.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glDrawRangeElements
</span></span></a>,
41 <a class=
"citerefentry" href=
"glDrawArrays.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glDrawArrays
</span></span></a>,
<a class=
"citerefentry" href=
"glMultiDrawArrays.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glMultiDrawArrays
</span></span></a>, or
<a class=
"citerefentry" href=
"glMultiDrawElements.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glMultiDrawElements
</span></span></a>
44 Execution of
<code class=
"function">glEdgeFlagPointer
</code> is not allowed between the execution of
45 <a class=
"citerefentry" href=
"glBegin.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glBegin
</span></span></a> and the corresponding execution of
<a class=
"citerefentry" href=
"glEnd.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glEnd
</span></span></a>,
46 but an error may or may not be generated. If no error is generated,
47 the operation is undefined.
49 <code class=
"function">glEdgeFlagPointer
</code> is typically implemented on the client side.
51 Edge flag array parameters are client-side state and are therefore
52 not saved or restored by
<a class=
"citerefentry" href=
"glPushAttrib.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glPushAttrib
</span></span></a> and
<a class=
"citerefentry" href=
"glPopAttrib.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glPopAttrib
</span></span></a>.
53 Use
<a class=
"citerefentry" href=
"glPushClientAttrib.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glPushClientAttrib
</span></span></a> and
54 <a class=
"citerefentry" href=
"glPopClientAttrib.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glPopClientAttrib
</span></span></a> instead.
55 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"errors"></a><h2>Errors
</h2><p>
56 <code class=
"constant">GL_INVALID_ENUM
</code> is generated if
<em class=
"parameter"><code>stride
</code></em> is negative.
57 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"associatedgets"></a><h2>Associated Gets
</h2><p>
58 <a class=
"citerefentry" href=
"glIsEnabled.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glIsEnabled
</span></span></a> with argument
<code class=
"constant">GL_EDGE_FLAG_ARRAY
</code>
60 <a class=
"citerefentry" href=
"glGet.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glGet
</span></span></a> with argument
<code class=
"constant">GL_EDGE_FLAG_ARRAY_STRIDE
</code>
62 <a class=
"citerefentry" href=
"glGet.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glGet
</span></span></a> with argument
<code class=
"constant">GL_EDGE_FLAG_ARRAY_BUFFER_BINDING
</code>
64 <a class=
"citerefentry" href=
"glGet.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glGet
</span></span></a> with argument
<code class=
"constant">GL_ARRAY_BUFFER_BINDING
</code>
66 <a class=
"citerefentry" href=
"glGetPointerv.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glGetPointerv
</span></span></a> with argument
<code class=
"constant">GL_EDGE_FLAG_ARRAY_POINTER
</code>
67 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"seealso"></a><h2>See Also
</h2><p>
68 <a class=
"citerefentry" href=
"glArrayElement.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glArrayElement
</span></span></a>,
69 <a class=
"citerefentry" href=
"glBindBuffer.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glBindBuffer
</span></span></a>,
70 <a class=
"citerefentry" href=
"glColorPointer.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glColorPointer
</span></span></a>,
71 <a class=
"citerefentry" href=
"glDisableClientState.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glDisableClientState
</span></span></a>,
72 <a class=
"citerefentry" href=
"glDrawArrays.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glDrawArrays
</span></span></a>,
73 <a class=
"citerefentry" href=
"glDrawElements.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glDrawElements
</span></span></a>,
74 <a class=
"citerefentry" href=
"glDrawRangeElements.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glDrawRangeElements
</span></span></a>,
75 <a class=
"citerefentry" href=
"glEdgeFlag.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glEdgeFlag
</span></span></a>,
76 <a class=
"citerefentry" href=
"glEnableClientState.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glEnableClientState
</span></span></a>,
77 <a class=
"citerefentry" href=
"glFogCoordPointer.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glFogCoordPointer
</span></span></a>,
78 <a class=
"citerefentry" href=
"glIndexPointer.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glIndexPointer
</span></span></a>,
79 <a class=
"citerefentry" href=
"glInterleavedArrays.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glInterleavedArrays
</span></span></a>,
80 <a class=
"citerefentry" href=
"glMultiDrawArrays.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glMultiDrawArrays
</span></span></a>,
81 <a class=
"citerefentry" href=
"glMultiDrawElements.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glMultiDrawElements
</span></span></a>,
82 <a class=
"citerefentry" href=
"glNormalPointer.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glNormalPointer
</span></span></a>,
83 <a class=
"citerefentry" href=
"glPopClientAttrib.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glPopClientAttrib
</span></span></a>,
84 <a class=
"citerefentry" href=
"glPushClientAttrib.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glPushClientAttrib
</span></span></a>,
85 <a class=
"citerefentry" href=
"glSecondaryColorPointer.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glSecondaryColorPointer
</span></span></a>,
86 <a class=
"citerefentry" href=
"glTexCoordPointer.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glTexCoordPointer
</span></span></a>,
87 <a class=
"citerefentry" href=
"glVertexAttribPointer.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glVertexAttribPointer
</span></span></a>,
88 <a class=
"citerefentry" href=
"glVertexPointer.xml"><span class=
"citerefentry"><span class=
"refentrytitle">glVertexPointer
</span></span></a>
89 </p></div><div class=
"refsect1" lang=
"en" xml:
lang=
"en"><a id=
"Copyright"></a><h2>Copyright
</h2><p>
90 Copyright
<span class=
"trademark"></span>©
1991-
2006
91 Silicon Graphics, Inc. This document is licensed under the SGI
92 Free Software B License. For details, see
93 <a class=
"ulink" href=
"http://oss.sgi.com/projects/FreeB/" target=
"_top">http://oss.sgi.com/projects/FreeB/
</a>.
94 </p></div></div></body></html>