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GLPUSHATTRIB(3G)								 GLPUSHATTRIB(3G)

NAME
       glPushAttrib, glPopAttrib - push and pop the server attribute stack

C SPECIFICATION
       void glPushAttrib( GLbitfield mask )

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

C SPECIFICATION
       void glPopAttrib( void )

DESCRIPTION
       glPushAttrib 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 col-
       umn 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
				GL_TEXTURE_3D 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
				glTexGen plane equations for S, T, R, and Q
				Current texture bindings (for example, GL_TEXTURE_BINDING_2D)

       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_RESCALE_NORMAL flag

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

       glPopAttrib restores the values of the state variables saved with the last
       glPushAttrib 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
       glPushClientAttrib.

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

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

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

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

       GL_INVALID_OPERATION  is  generated if glPushAttrib or glPopAttrib is executed between the
       execution of glBegin and the corresponding execution of glEnd.

ASSOCIATED GETS
       glGet with argument GL_ATTRIB_STACK_DEPTH
       glGet with argument GL_MAX_ATTRIB_STACK_DEPTH

SEE ALSO
       glGet(3G),    glGetClipPlane(3G),    glGetError(3G),	glGetLight(3G),     glGetMap(3G),
       glGetMaterial(3G),
       glGetPixelMap(3G),      glGetPolygonStipple(3G),     glGetString(3G),	 glGetTexEnv(3G),
       glGetTexGen(3G),  glGetTexImage(3G),  glGetTexLevelParameter(3G),   glGetTexParameter(3G),
       glIsEnabled(3G), glPushClientAttrib(3G)

										 GLPUSHATTRIB(3G)
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