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_C_ License Applicability. Except to the extent portions of this file are
_C_ made subject to an alternative license as permitted in the SGI Free
_C_ Software License B, Version 1.1 (the "License"), the contents of this
_C_ file are subject only to the provisions of the License. You may not use
_C_ this file except in compliance with the License. You may obtain a copy
_C_ of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
_C_ Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
_C_
_C_ http://oss.sgi.com/projects/FreeB
_C_
_C_ Note that, as provided in the License, the Software is distributed on an
_C_ "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
_C_ DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
_C_ CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
_C_ PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
_C_
_C_ Original Code. The Original Code is: OpenGL Sample Implementation,
_C_ Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
_C_ Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
_C_ Copyright in any portions created by third parties is as indicated
_C_ elsewhere herein. All Rights Reserved.
_C_
_C_ Additional Notice Provisions: The application programming interfaces
_C_ established by SGI in conjunction with the Original Code are The
_C_ OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
_C_ April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
_C_ 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
_C_ Window System(R) (Version 1.3), released October 19, 1998. This software
_C_ was created using the OpenGL(R) version 1.2.1 Sample Implementation
_C_ published by SGI, but has not been independently verified as being
_C_ compliant with the OpenGL(R) version 1.2.1 Specification.
_C_
_C_ The first character in this file must be an '_'!
_C_ Anything on a line after _C_ is ignored
_define(_filters,eqn|tbl)_C_
_header(PushAttrib,push and pop the server attribute stack)
_names(PushAttrib)
.SH PARAMETERS
_phead(_param1)
Specifies a mask that indicates which attributes to save. Values for
_param1 are listed below.
_names(PopAttrib)
.SH DESCRIPTION
_cmnd 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.
_param1(1)
is typically constructed by ORing several of these constants together.
The special mask
_const(ALL_ATTRIB_BITS)
can be used to save all stackable states.
.P
The symbolic mask constants and their associated GL state are as follows
(the second column lists which attributes are saved):
.P
.TS
;
l l .
_const(ACCUM_BUFFER_BIT) Accumulation buffer clear value
_const(COLOR_BUFFER_BIT) _const(ALPHA_TEST) enable bit
Alpha test function and reference value
_const(BLEND) enable bit
Blending source and destination functions
Constant blend color
Blending equation
_const(DITHER) enable bit
_const(DRAW_BUFFER) setting
_const(COLOR_LOGIC_OP) enable bit
_const(INDEX_LOGIC_OP) enable bit
Logic op function
Color mode and index mode clear values
Color mode and index mode writemasks
_const(CURRENT_BIT) Current RGBA color
Current color index
Current normal vector
Current texture coordinates
Current raster position
_const(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
_const(EDGE_FLAG) flag
_const(DEPTH_BUFFER_BIT) _const(DEPTH_TEST) enable bit
Depth buffer test function
Depth buffer clear value
_const(DEPTH_WRITEMASK) enable bit
_const(ENABLE_BIT) _const(ALPHA_TEST) flag
_const(AUTO_NORMAL) flag
_const(BLEND) flag
Enable bits for the user-definable clipping planes
_const(COLOR_MATERIAL)
_const(CULL_FACE) flag
_const(DEPTH_TEST) flag
_const(DITHER) flag
_const(FOG) flag
_const(LIGHT)\f2i\fP where 0\ <= \f2i\fP<_const(MAX_LIGHTS)
_const(LIGHTING) flag
_const(LINE_SMOOTH) flag
_const(LINE_STIPPLE) flag
_const(COLOR_LOGIC_OP) flag
_const(INDEX_LOGIC_OP) flag
_const(MAP1_)\f2x\fP where \f2x\fP is a map type
_const(MAP2_)\f2x\fP where \f2x\fP is a map type
_const(NORMALIZE) flag
_const(POINT_SMOOTH) flag
_const(POLYGON_OFFSET_LINE) flag
_const(POLYGON_OFFSET_FILL) flag
_const(POLYGON_OFFSET_POINT) flag
_const(POLYGON_SMOOTH) flag
_const(POLYGON_STIPPLE) flag
_const(SCISSOR_TEST) flag
_const(STENCIL_TEST) flag
_const(TEXTURE_1D) flag
_const(TEXTURE_2D) flag
_const(TEXTURE_3D) flag
Flags _const(TEXTURE_GEN_)\f2x\fP where \f2x\fP is S, T, R, or Q
_const(EVAL_BIT) _const(MAP1_)\f2x\fP enable bits, where \f2x\fP is a map type
_const(MAP2_)\f2x\fP enable bits, where \f2x\fP is a map type
1D grid endpoints and divisions
2D grid endpoints and divisions
_const(AUTO_NORMAL) enable bit
_const(FOG_BIT) _const(FOG) enable bit
Fog color
Fog density
Linear fog start
Linear fog end
Fog index
_const(FOG_MODE) value
_const(HINT_BIT) _const(PERSPECTIVE_CORRECTION_HINT) setting
_const(POINT_SMOOTH_HINT) setting
_const(LINE_SMOOTH_HINT) setting
_const(POLYGON_SMOOTH_HINT) setting
_const(FOG_HINT) setting
_const(LIGHTING_BIT) _const(COLOR_MATERIAL) enable bit
_const(COLOR_MATERIAL_FACE) value
Color material parameters that are tracking the current color
Ambient scene color
_const(LIGHT_MODEL_LOCAL_VIEWER) value
_const(LIGHT_MODEL_TWO_SIDE) setting
_const(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
_const(SHADE_MODEL) setting
_const(LINE_BIT) _const(LINE_SMOOTH) flag
_const(LINE_STIPPLE) enable bit
Line stipple pattern and repeat counter
Line width
_const(LIST_BIT) _const(LIST_BASE) setting
_const(PIXEL_MODE_BIT) _const(RED_BIAS) and _const(RED_SCALE) settings
_const(GREEN_BIAS) and _const(GREEN_SCALE) values
_const(BLUE_BIAS) and _const(BLUE_SCALE)
_const(ALPHA_BIAS) and _const(ALPHA_SCALE)
_const(DEPTH_BIAS) and _const(DEPTH_SCALE)
_const(INDEX_OFFSET) and _const(INDEX_SHIFT) values
_const(MAP_COLOR) and _const(MAP_STENCIL) flags
_const(ZOOM_X) and _const(ZOOM_Y) factors
_const(READ_BUFFER) setting
_const(POINT_BIT) _const(POINT_SMOOTH) flag
Point size
_const(POLYGON_BIT) _const(CULL_FACE) enable bit
_const(CULL_FACE_MODE) value
_const(FRONT_FACE) indicator
_const(POLYGON_MODE) setting
_const(POLYGON_SMOOTH) flag
_const(POLYGON_STIPPLE) enable bit
_const(POLYGON_OFFSET_FILL) flag
_const(POLYGON_OFFSET_LINE) flag
_const(POLYGON_OFFSET_POINT) flag
_const(POLYGON_OFFSET_FACTOR)
_const(POLYGON_OFFSET_UNITS)
_const(POLYGON_STIPPLE_BIT) Polygon stipple image
_const(SCISSOR_BIT) _const(SCISSOR_TEST) flag
Scissor box
_const(STENCIL_BUFFER_BIT) _const(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
_const(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 _const(TEXTURE_GEN_)\f2x\fP, \f2x\fP is S, T, R, and Q
_const(TEXTURE_GEN_MODE) setting for S, T, R, and Q
_cmnd(TexGen) plane equations for S, T, R, and Q
Current texture bindings (for example, _const(TEXTURE_BINDING_2D))
_const(TRANSFORM_BIT) Coefficients of the six clipping planes
Enable bits for the user-definable clipping planes
_const(MATRIX_MODE) value
_const(NORMALIZE) flag
_const(RESCALE_NORMAL) flag
_const(VIEWPORT_BIT) Depth range (near and far)
Viewport origin and extent
.TE
.P
_cmnd(PopAttrib) restores the values of the state variables saved with the last
.br
_cmnd(PushAttrib) command.
Those not saved are left unchanged.
.P
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.
.P
Initially, the attribute stack is empty.
.SH 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
_cmnd(PushClientAttrib).
.P
The depth of the attribute stack depends on the implementation,
but it must be at least 16.
.P
When the _arbstring(multitexture) extension is supported, pushing and
popping texture state applies to all supported texture units.
.SH ERRORS
_const(STACK_OVERFLOW) is generated if _cmnd(PushAttrib) is called while
the attribute stack is full.
.P
_const(STACK_UNDERFLOW) is generated if _cmnd(PopAttrib) is called while
the attribute stack is empty.
.P
_const(INVALID_OPERATION) is generated if _cmnd(PushAttrib) or _cmnd(PopAttrib)
is executed between the execution of _cmnd(Begin)
and the corresponding execution of _cmnd(End).
.SH ASSOCIATED GETS
_cmnd(Get) with argument _const(ATTRIB_STACK_DEPTH)
.br
_cmnd(Get) with argument _const(MAX_ATTRIB_STACK_DEPTH)
.SH SEE ALSO
_cmnd(Get),
_cmnd(GetClipPlane),
_cmnd(GetError),
_cmnd(GetLight),
_cmnd(GetMap),
_cmnd(GetMaterial),
.br
_cmnd(GetPixelMap),
_cmnd(GetPolygonStipple),
_cmnd(GetString),
_cmnd(GetTexEnv),
_cmnd(GetTexGen),
_cmnd(GetTexImage),
_cmnd(GetTexLevelParameter),
_cmnd(GetTexParameter),
_cmnd(IsEnabled),
_cmnd(PushClientAttrib)
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