glEdgeFlagPointer man page on Oracle
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GLEDGEFLAGPOINTER(3G) OpenGL Manual GLEDGEFLAGPOINTER(3G)
NAME
glEdgeFlagPointer - define an array of edge flags
C SPECIFICATION
void glEdgeFlagPointer(GLsizei stride, const GLvoid * pointer);
PARAMETERS
stride
Specifies the byte offset between consecutive edge flags. If stride
is 0, the edge flags are understood to be tightly packed in the
array. The initial value is 0.
pointer
Specifies a pointer to the first edge flag in the array. The
initial value is 0.
DESCRIPTION
glEdgeFlagPointer specifies the location and data format of an array of
boolean edge flags to use when rendering. stride specifies the byte
stride from one edge flag to the next, allowing vertices and attributes
to be packed into a single array or stored in separate arrays.
If a non-zero named buffer object is bound to the GL_ARRAY_BUFFER
target (see glBindBuffer()) while an edge flag array is specified,
pointer is treated as a byte offset into the buffer object's data
store. Also, the buffer object binding (GL_ARRAY_BUFFER_BINDING) is
saved as edge flag vertex array client-side state
(GL_EDGE_FLAG_ARRAY_BUFFER_BINDING).
When an edge flag array is specified, stride and pointer are saved as
client-side state, in addition to the current vertex array buffer
object binding.
To enable and disable the edge flag array, call glEnableClientState()
and glDisableClientState() with the argument GL_EDGE_FLAG_ARRAY. If
enabled, the edge flag array is used when glDrawArrays(),
glMultiDrawArrays(), glDrawElements(), glMultiDrawElements(),
glDrawRangeElements(), or glArrayElement() is called.
NOTES
glEdgeFlagPointer is available only if the GL version is 1.1 or
greater.
Edge flags are not supported for interleaved vertex array formats (see
glInterleavedArrays()).
The edge flag array is initially disabled and isn't accessed when
glArrayElement(), glDrawElements(), glDrawRangeElements(),
glDrawArrays(), glMultiDrawArrays(), or glMultiDrawElements() is
called.
Execution of glEdgeFlagPointer is not allowed between the execution of
glBegin() and the corresponding execution of glEnd(), but an error may
or may not be generated. If no error is generated, the operation is
undefined.
glEdgeFlagPointer is typically implemented on the client side.
Edge flag array parameters are client-side state and are therefore not
saved or restored by glPushAttrib() and glPopAttrib(). Use
glPushClientAttrib() and glPopClientAttrib() instead.
ERRORS
GL_INVALID_ENUM is generated if stride is negative.
ASSOCIATED GETS
glIsEnabled() with argument GL_EDGE_FLAG_ARRAY
glGet() with argument GL_EDGE_FLAG_ARRAY_STRIDE
glGet() with argument GL_EDGE_FLAG_ARRAY_BUFFER_BINDING
glGet() with argument GL_ARRAY_BUFFER_BINDING
glGetPointerv() with argument GL_EDGE_FLAG_ARRAY_POINTER
SEE ALSO
glArrayElement(), glBindBuffer(), glColorPointer(),
glDisableClientState(), glDrawArrays(), glDrawElements(),
glDrawRangeElements(), glEdgeFlag(), glEnableClientState(),
glFogCoordPointer(), glIndexPointer(), glInterleavedArrays(),
glMultiDrawArrays(), glMultiDrawElements(), glNormalPointer(),
glPopClientAttrib(), glPushClientAttrib(), glSecondaryColorPointer(),
glTexCoordPointer(), glVertexAttribPointer(), glVertexPointer()
COPYRIGHT
Copyright © 1991-2006 Silicon Graphics, Inc. This document is licensed
under the SGI Free Software B License. For details, see
http://oss.sgi.com/projects/FreeB/.
AUTHORS
opengl.org
opengl.org 04/29/2014 GLEDGEFLAGPOINTER(3G)
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