glpushclientattrib(3g) [mojave man page]

GLPUSHCLIENTATTRIB(3G)													    GLPUSHCLIENTATTRIB(3G)

NAME

       glPushClientAttrib, glPopClientAttrib - push and pop the client attribute stack

C SPECIFICATION

       void glPushClientAttrib( GLbitfield mask )

PARAMETERS

       mask  Specifies a mask that indicates which attributes to save.	Values for mask are listed below.

C SPECIFICATION

       void glPopClientAttrib( void )

DESCRIPTION

       glPushClientAttrib  takes one argument, a mask that indicates which groups of client-state variables to save on the client attribute stack.
       Symbolic constants are used to set bits in the mask.  mask is typically constructed by OR'ing several of  these	constants  together.   The
       special mask GL_CLIENT_ALL_ATTRIB_BITS can be used to save all stackable client state.

       The symbolic mask constants and their associated GL client state are as follows (the second column lists which attributes are saved):

       GL_CLIENT_PIXEL_STORE_BIT     Pixel storage modes
       GL_CLIENT_VERTEX_ARRAY_BIT    Vertex arrays (and enables)

       glPopClientAttrib  restores  the  values  of  the  client-state variables saved with the last glPushClientAttrib.  Those not saved are left
       unchanged.

       It is an error to push attributes onto a full client attribute stack, or to pop attributes off an empty stack.  In either case,	the  error
       flag is set, and no other change is made to GL state.

       Initially, the client attribute stack is empty.

NOTES

       glPushClientAttrib is available only if the GL version is 1.1 or greater.

       Not all values for GL client state can be saved on the attribute stack.	For example, select and feedback state cannot be saved.

       The depth of the attribute stack depends on the implementation, but it must be at least 16.

       Use glPushAttrib and glPopAttrib to push and restore state which is kept on the server. Only pixel storage modes and vertex array state may
       be pushed and popped with glPushClientAttrib and glPopClientAttrib.

       When the GL_ARB_multitexture extension is supported, pushing and popping client vertex array state apples to all supported  texture  units,
       and the active client texture state.

ERRORS

       GL_STACK_OVERFLOW is generated if glPushClientAttrib is called while the attribute stack is full.

       GL_STACK_UNDERFLOW is generated if glPopClientAttrib is called while the attribute stack is empty.

ASSOCIATED GETS

       glGet with argument GL_ATTRIB_STACK_DEPTH
       glGet with argument GL_MAX_CLIENT_ATTRIB_STACK_DEPTH

SEE ALSO

       glColorPointer,	 glDisableClientState,	 glEdgeFlagPointer,   glEnableClientState,  glGet,  glGetError,  glIndexPointer,  glNormalPointer,
       glNewList, glPixelStore, glPushAttrib, glTexCoordPointer, glVertexPointer

															    GLPUSHCLIENTATTRIB(3G)

GLEDGEFLAGPOINTER(3G)													     GLEDGEFLAGPOINTER(3G)

NAME

       glEdgeFlagPointer - define an array of edge flags

C SPECIFICATION

       void glEdgeFlagPointer( GLsizei stride,
			       const GLboolean *pointer )

PARAMETERS

       stride	Specifies the byte offset between consecutive edge flags.  If stride is 0 (the initial value), 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 zero.

DESCRIPTION

       glEdgeFlagPointer specifies the location and data  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.
       (Single-array storage may be more efficient on some implementations; see glInterleavedArrays.)

       When an edge flag array is specified, stride and pointer are saved as client-side state.

       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,  glDrawElements,	or
       glArrayElement is called.

       Use  glDrawArrays  to  construct a sequence of primitives (all of the same type) from prespecified vertex and vertex attribute arrays.  Use
       glArrayElement to specify primitives by indexing vertices and vertex attributes and glDrawElements to construct a sequence of primitives by
       indexing vertices and vertex attributes.

NOTES

       glEdgeFlagPointer is available only if the GL version is 1.1 or greater.

       The edge flag array is initially disabled and it won't be accessed when
       glArrayElement, glDrawElements or glDrawArrays 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
       glGetPointerv with argument GL_EDGE_FLAG_ARRAY_POINTER

SEE ALSO

       glArrayElement, glColorPointer, glDrawArrays, glDrawElements, glEnable, glGetPointerv, glIndexPointer, glNormalPointer, glPopClientAttrib,
       glPushClientAttrib, glTexCoordPointer, glVertexPointer

															     GLEDGEFLAGPOINTER(3G)