NAME
	  fglPushAttrib, fglPopAttrib -	push and pop the server
	  attribute stack


     FORTRAN SPECIFICATION
	  SUBROUTINE fglPushAttrib( INTEGER*4 mask )


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

     FORTRAN SPECIFICATION
	  SUBROUTINE fglPopAttrib( )


     DESCRIPTION
	  fglPushAttrib	takes one argument, a mask that	indicates
	  which	groups of state	variables to save on the attribute
	  stack.  Symbolic constants are used to set bits in the mask.
	  mask is typically constructed	by ORing several of these
	  constants together.  The special mask	GL_ALL_ATTRIB_BITS can
	  be used to save all stackable	states.

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

	  GL_ACCUM_BUFFER_BIT	   Accumulation	buffer clear value

	  GL_COLOR_BUFFER_BIT	   GL_ALPHA_TEST enable	bit
				   Alpha test function and reference value
				   GL_BLEND enable bit
				   Blending source and destination functions
				   Constant blend color
				   Blending equation
				   GL_DITHER enable bit
				   GL_DRAW_BUFFER setting
				   GL_COLOR_LOGIC_OP enable bit
				   GL_INDEX_LOGIC_OP enable bit
				   Logic op function
				   Color mode and index	mode clear values
				   Color mode and index	mode writemasks

	  GL_CURRENT_BIT	   Current RGBA	color
				   Current color index
				   Current normal vector
				   Current texture coordinates
				   Current raster position


				   GL_CURRENT_RASTER_POSITION_VALID flag
				   RGBA	color associated with current raster position
				   Color index associated with current raster position
				   Texture coordinates associated with current raster position
				   GL_EDGE_FLAG	flag

	  GL_DEPTH_BUFFER_BIT	   GL_DEPTH_TEST enable	bit
				   Depth buffer	test function
				   Depth buffer	clear value
				   GL_DEPTH_WRITEMASK enable bit

	  GL_ENABLE_BIT		   GL_ALPHA_TEST flag
				   GL_AUTO_NORMAL flag
				   GL_BLEND flag
				   Enable bits for the user-definable clipping planes
				   GL_COLOR_MATERIAL
				   GL_CULL_FACE	flag
				   GL_DEPTH_TEST flag
				   GL_DITHER flag
				   GL_FOG flag
				   GL_LIGHTi where 0 <=	i<GL_MAX_LIGHTS
				   GL_LIGHTING flag
				   GL_LINE_SMOOTH flag
				   GL_LINE_STIPPLE flag
				   GL_COLOR_LOGIC_OP flag
				   GL_INDEX_LOGIC_OP flag
				   GL_MAP1_x where x is	a map type
				   GL_MAP2_x where x is	a map type
				   GL_NORMALIZE	flag
				   GL_POINT_SMOOTH flag
				   GL_POLYGON_OFFSET_LINE flag
				   GL_POLYGON_OFFSET_FILL flag
				   GL_POLYGON_OFFSET_POINT flag
				   GL_POLYGON_SMOOTH flag
				   GL_POLYGON_STIPPLE flag
				   GL_SCISSOR_TEST flag
				   GL_STENCIL_TEST flag
				   GL_TEXTURE_1D flag
				   GL_TEXTURE_2D flag
				   Flags GL_TEXTURE_GEN_x where	x is S,	T, R, or Q

	  GL_EVAL_BIT		   GL_MAP1_x enable bits, where	x is a map type
				   GL_MAP2_x enable bits, where	x is a map type
				   1D grid endpoints and divisions
				   2D grid endpoints and divisions
				   GL_AUTO_NORMAL enable bit

	  GL_FOG_BIT		   GL_FOG enable bit
				   Fog color
				   Fog density


				   Linear fog start
				   Linear fog end
				   Fog index
				   GL_FOG_MODE value

	  GL_HINT_BIT		   GL_PERSPECTIVE_CORRECTION_HINT setting
				   GL_POINT_SMOOTH_HINT	setting
				   GL_LINE_SMOOTH_HINT setting
				   GL_POLYGON_SMOOTH_HINT setting
				   GL_FOG_HINT setting

	  GL_LIGHTING_BIT	   GL_COLOR_MATERIAL enable bit
				   GL_COLOR_MATERIAL_FACE value
				   Color material parameters that are tracking the current color
				   Ambient scene color
				   GL_LIGHT_MODEL_LOCAL_VIEWER value
				   GL_LIGHT_MODEL_TWO_SIDE setting
				   GL_LIGHTING enable bit
				   Enable bit for each light
				   Ambient, diffuse, and specular intensity for	each light
				   Direction, position,	exponent, and cutoff angle for each light
				   Constant, linear, and quadratic attenuation factors for each	light
				   Ambient, diffuse, specular, and emissive color for each material
				   Ambient, diffuse, and specular color	indices	for each material
				   Specular exponent for each material
				   GL_SHADE_MODEL setting

	  GL_LINE_BIT		   GL_LINE_SMOOTH flag
				   GL_LINE_STIPPLE enable bit
				   Line	stipple	pattern	and repeat counter
				   Line	width

	  GL_LIST_BIT		   GL_LIST_BASE	setting

	  GL_PIXEL_MODE_BIT	   GL_RED_BIAS and GL_RED_SCALE	settings
				   GL_GREEN_BIAS and GL_GREEN_SCALE values
				   GL_BLUE_BIAS	and GL_BLUE_SCALE
				   GL_ALPHA_BIAS and GL_ALPHA_SCALE
				   GL_DEPTH_BIAS and GL_DEPTH_SCALE
				   GL_INDEX_OFFSET and GL_INDEX_SHIFT values
				   GL_MAP_COLOR	and GL_MAP_STENCIL flags
				   GL_ZOOM_X and GL_ZOOM_Y factors
				   GL_READ_BUFFER setting

	  GL_POINT_BIT		   GL_POINT_SMOOTH flag
				   Point size

	  GL_POLYGON_BIT	   GL_CULL_FACE	enable bit
				   GL_CULL_FACE_MODE value
				   GL_FRONT_FACE indicator


				   GL_POLYGON_MODE setting
				   GL_POLYGON_SMOOTH flag
				   GL_POLYGON_STIPPLE enable bit
				   GL_POLYGON_OFFSET_FILL flag
				   GL_POLYGON_OFFSET_LINE flag
				   GL_POLYGON_OFFSET_POINT flag
				   GL_POLYGON_OFFSET_FACTOR
				   GL_POLYGON_OFFSET_UNITS

	  GL_POLYGON_STIPPLE_BIT   Polygon stipple image

	  GL_SCISSOR_BIT	   GL_SCISSOR_TEST flag
				   Scissor box

	  GL_STENCIL_BUFFER_BIT	   GL_STENCIL_TEST enable bit
				   Stencil function and	reference value
				   Stencil value mask
				   Stencil fail, pass, and depth buffer	pass actions
				   Stencil buffer clear	value
				   Stencil buffer writemask

	  GL_TEXTURE_BIT	   Enable bits for the four texture coordinates
				   Border color	for each texture image
				   Minification	function for each texture image
				   Magnification function for each texture image
				   Texture coordinates and wrap	mode for each texture image
				   Color and mode for each texture environment
				   Enable bits GL_TEXTURE_GEN_x, x is S, T, R, and Q
				   GL_TEXTURE_GEN_MODE setting for S, T, R, and	Q
				   fglTexGen plane equations for S, T, R, and Q
				   Current texture bindings (for example, GL_TEXTURE_2D_BINDING)

	  GL_TRANSFORM_BIT	   Coefficients	of the six clipping planes
				   Enable bits for the user-definable clipping planes
				   GL_MATRIX_MODE value
				   GL_NORMALIZE	flag

	  GL_VIEWPORT_BIT	   Depth range (near and far)
				   Viewport origin and extent

	  fglPopAttrib restores	the values of the state	variables
	  saved	with the last
	  fglPushAttrib	command.  Those	not saved are left unchanged.

	  It is	an error to push attributes onto a full	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 attribute stack is empty.

     NOTES
	  Not all values for GL	state can be saved on the attribute
	  stack.  For example, render mode state, and select and
	  feedback state cannot	be saved.  Client state	must be	saved
	  with fglPushClientAttrib.

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

     ERRORS
	  GL_STACK_OVERFLOW is generated if fglPushAttrib is called
	  while	the attribute stack is full.

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

	  GL_INVALID_OPERATION is generated if fglPushAttrib or
	  fglPopAttrib is executed between the execution of fglBegin
	  and the corresponding	execution of fglEnd.

     ASSOCIATED	GETS
	  fglGet with argument GL_ATTRIB_STACK_DEPTH
	  fglGet with argument GL_MAX_ATTRIB_STACK_DEPTH

     SEE ALSO
	  fglGet, fglGetClipPlane, fglGetError,	fglGetLight,
	  fglGetMap, fglGetMaterial,
	  fglGetPixelMap, fglGetPolygonStipple,	fglGetString,
	  fglGetTexEnv,	fglGetTexGen, fglGetTexImage,
	  fglGetTexLevelParameter, fglGetTexParameter, fglIsEnabled,
	  fglPushClientAttrib