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glPushAttrib(3)                                              glPushAttrib(3)




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  fol-
       lows (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
                                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 pop-
       ping 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 execu-
       tion of glEnd.


ASSOCIATED GETS

       glGet with argument GL_ATTRIB_STACK_DEPTH
       glGet with argument GL_MAX_ATTRIB_STACK_DEPTH


SEE ALSO

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



                                                              glPushAttrib(3)

Mac OS X 10.6 - Generated Thu Sep 17 20:20:27 CDT 2009
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