MirOS Manual: glGet(3), glGetBooleanv(3), glGetDoublev(3), glGetFloatv(3), glGetIntegerv(3)


GLGET(3G)           UNIX Programmer's Manual            GLGET(3G)

NAME

     glGetBooleanv, glGetDoublev, glGetFloatv, glGetIntegerv -
     return the value or values of a selected parameter

C SPECIFICATION

     void glGetBooleanv( GLenum pname,
                         GLboolean *params )

C SPECIFICATION

     void glGetDoublev( GLenum pname,
                        GLdouble *params )

C SPECIFICATION

     void glGetFloatv( GLenum pname,
                       GLfloat *params )

C SPECIFICATION

     void glGetIntegerv( GLenum pname,
                         GLint *params )

PARAMETERS

     pname   Specifies the parameter value to be returned. The
             symbolic constants in the list below are accepted.

     params  Returns the value or values of the specified parame-
             ter.

DESCRIPTION

     These four commands return values for simple state variables
     in GL. pname is a symbolic constant indicating the state
     variable to be returned, and params is a pointer to an array
     of the indicated type in which to place the returned data.

     Type conversion is performed if params has a different type
     than the state variable value being requested. If
     glGetBooleanv is called, a floating-point (or integer) value
     is converted to GL_FALSE if and only if it is 0.0 (or 0).
     Otherwise, it is converted to GL_TRUE. If glGetIntegerv is
     called, boolean values are returned as GL_TRUE or GL_FALSE,
     and most floating-point values are rounded to the nearest
     integer value. Floating-point colors and normals, however,
     are returned with a linear mapping that maps 1.0 to the most
     positive representable integer value, and -1.0 to the most
     negative representable integer value. If glGetFloatv or
     glGetDoublev is called, boolean values are returned as
     GL_TRUE or GL_FALSE, and integer values are converted to
     floating-point values.

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     The following symbolic constants are accepted by pname:

     GL_ACCUM_ALPHA_BITS      params returns one value, the
                              number of alpha bitplanes in the
                              accumulation buffer.

     GL_ACCUM_BLUE_BITS       params returns one value, the
                              number of blue bitplanes in the
                              accumulation buffer.

     GL_ACCUM_CLEAR_VALUE     params returns four values: the
                              red, green, blue, and alpha values
                              used to clear the accumulation
                              buffer. Integer values, if
                              requested, are linearly mapped from
                              the internal floating-point
                              representation such that 1.0
                              returns the most positive
                              representable integer value, and
                              -1.0 returns the most negative
                              representable integer value. The
                              initial value is (0, 0, 0, 0). See
                              glClearAccum.

     GL_ACCUM_GREEN_BITS      params returns one value, the
                              number of green bitplanes in the
                              accumulation buffer.

     GL_ACCUM_RED_BITS        params returns one value, the
                              number of red bitplanes in the
                              accumulation buffer.

     GL_ACTIVE_TEXTURE_ARB    params returns a single value indi-
                              cating the active multitexture
                              unit. The initial value is
                              GL_TEXTURE0_ARB. See
                              glActiveTextureARB.

     GL_ALIASED_POINT_SIZE_RANGE
                              params returns two values, the
                              smallest and largest supported
                              sizes for aliased points.

     GL_ALIASED_LINE_WIDTH_RANGE
                              params returns two values, the
                              smallest and largest supported
                              widths for aliased lines.

     GL_ALPHA_BIAS            params returns one value, the alpha
                              bias factor used during pixel
                              transfers. The initial value is 0.
                              See glPixelTransfer.

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     GL_ALPHA_BITS            params returns one value, the
                              number of alpha bitplanes in each
                              color buffer.

     GL_ALPHA_SCALE           params returns one value, the alpha
                              scale factor used during pixel
                              transfers. The initial value is 1.
                              See glPixelTransfer.

     GL_ALPHA_TEST            params returns a single boolean
                              value indicating whether alpha
                              testing of fragments is enabled.
                              The initial value is GL_FALSE. See
                              glAlphaFunc.

     GL_ALPHA_TEST_FUNC       params returns one value, the sym-
                              bolic name of the alpha test func-
                              tion. The initial value is
                              GL_ALWAYS. See glAlphaFunc.

     GL_ALPHA_TEST_REF        params returns one value, the
                              reference value for the alpha test.
                              The initial value is 0. See
                              glAlphaFunc. An integer value, if
                              requested, is linearly mapped from
                              the internal floating-point
                              representation such that 1.0
                              returns the most positive
                              representable integer value, and
                              -1.0 returns the most negative
                              representable integer value.

     GL_ATTRIB_STACK_DEPTH    params returns one value, the depth
                              of the attribute stack. If the
                              stack is empty, 0 is returned. The
                              initial value is 0. See
                              glPushAttrib.

     GL_AUTO_NORMAL           params returns a single boolean
                              value indicating whether 2D map
                              evaluation automatically generates
                              surface normals. The initial value
                              is GL_FALSE. See glMap2.

     GL_AUX_BUFFERS           params returns one value, the
                              number of auxiliary color buffers.
                              The initial value is 0.

     GL_BLEND                 params returns a single boolean
                              value indicating whether blending
                              is enabled. The initial value is
                              GL_FALSE. See glBlendFunc.

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     GL_BLEND_COLOR           params returns four values, the
                              red, green, blue, and alpha values
                              which are the components of the
                              blend color. See glBlendColor.

     GL_BLEND_DST             params returns one value, the sym-
                              bolic constant identifying the des-
                              tination blend function. The ini-
                              tial value is GL_ZERO. See
                              glBlendFunc.

     GL_BLEND_EQUATION        params returns one value, a sym-
                              bolic constant indicating whether
                              the blend equation is GL_FUNC_ADD,
                              GL_MIN or GL_MAX. See
                              glBlendEquation.

     GL_BLEND_SRC             params returns one value, the sym-
                              bolic constant identifying the
                              source blend function. The initial
                              value is GL_ONE. See glBlendFunc.

     GL_BLUE_BIAS             params returns one value, the blue
                              bias factor used during pixel
                              transfers. The initial value is 0.
                              See glPixelTransfer.

     GL_BLUE_BITS             params returns one value, the
                              number of blue bitplanes in each
                              color buffer.

     GL_BLUE_SCALE            params returns one value, the blue
                              scale factor used during pixel
                              transfers. The initial value is 1.
                              See glPixelTransfer.

     GL_CLIENT_ACTIVE_TEXTURE_ARB
                              params returns a single integer
                              value indicating the current client
                              active multitexture unit. The ini-
                              tial value is GL_TEXTURE0_ARB. See
                              glClientActiveTextureARB.

     GL_CLIENT_ATTRIB_STACK_DEPTH
                              params returns one value indicating
                              the depth of the attribute stack.
                              The initial value is 0. See
                              glPushClientAttrib.

     GL_CLIP_PLANEi           params returns a single boolean
                              value indicating whether the speci-
                              fied clipping plane is enabled. The

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                              initial value is GL_FALSE. See
                              glClipPlane.

     GL_COLOR_ARRAY           params returns a single boolean
                              value indicating whether the color
                              array is enabled. The initial value
                              is GL_FALSE. See glColorPointer.

     GL_COLOR_ARRAY_SIZE      params returns one value, the
                              number of components per color in
                              the color array. The initial value
                              is 4. See glColorPointer.

     GL_COLOR_ARRAY_STRIDE    params returns one value, the byte
                              offset between consecutive colors
                              in the color array. The initial
                              value is 0. See glColorPointer.

     GL_COLOR_ARRAY_TYPE      params returns one value, the data
                              type of each component in the color
                              array. The initial value is
                              GL_FLOAT. See glColorPointer.

     GL_COLOR_CLEAR_VALUE     params returns four values: the
                              red, green, blue, and alpha values
                              used to clear the color buffers.
                              Integer values, if requested, are
                              linearly mapped from the internal
                              floating-point representation such
                              that 1.0 returns the most positive
                              representable integer value, and
                              -1.0 returns the most negative
                              representable integer value. The
                              initial value is (0, 0, 0, 0). See
                              glClearColor.

     GL_COLOR_LOGIC_OP        params returns a single boolean
                              value indicating whether a
                              fragment's RGBA color values are
                              merged into the framebuffer using a
                              logical operation. The initial
                              value is GL_FALSE. See glLogicOp.

     GL_COLOR_MATERIAL        params returns a single boolean
                              value indicating whether one or
                              more material parameters are track-
                              ing the current color. The initial
                              value is GL_FALSE. See
                              glColorMaterial.

     GL_COLOR_MATERIAL_FACE   params returns one value, a sym-
                              bolic constant indicating which

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                              materials have a parameter that is
                              tracking the current color. The
                              initial value is GL_FRONT_AND_BACK.
                              See glColorMaterial.

     GL_COLOR_MATERIAL_PARAMETER
                              params returns one value, a sym-
                              bolic constant indicating which
                              material parameters are tracking
                              the current color. The initial
                              value is GL_AMBIENT_AND_DIFFUSE.
                              See glColorMaterial.

     GL_COLOR_MATRIX          params returns sixteen values: the
                              color matrix on the top of the
                              color matrix stack. Initially this
                              matrix is the identity matrix. See
                              glPushMatrix.

     GL_COLOR_MATRIX_STACK_DEPTH
                              params returns one value, the max-
                              imum supported depth of the projec-
                              tion matrix stack. The value must
                              be at least 2. See glPushMatrix.

     GL_COLOR_TABLE           params returns a single boolean
                              value indicating whether the color
                              table lookup is enabled. See
                              glColorTable.

     GL_COLOR_WRITEMASK       params returns four boolean values:
                              the red, green, blue, and alpha
                              write enables for the color
                              buffers. The initial value is (-
                              GL_TRUE, GL_TRUE, GL_TRUE,
                              GL_TRUE). See glColorMask.

     GL_CONVOLUTION_1D        params returns a single boolean
                              value indicating whether 1D convo-
                              lution is enabled. The initial
                              value is GL_FALSE. See
                              glConvolutionFilter1D.

     GL_CONVOLUTION_2D        params returns a single boolean
                              value indicating whether 2D convo-
                              lution is enabled. The initial
                              value is GL_FALSE. See
                              glConvolutionFilter2D.

     GL_CULL_FACE             params returns a single boolean
                              value indicating whether polygon
                              culling is enabled. The initial

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                              value is GL_FALSE. See glCullFace.

     GL_CULL_FACE_MODE        params returns one value, a sym-
                              bolic constant indicating which
                              polygon faces are to be culled. The
                              initial value is GL_BACK. See
                              glCullFace.

     GL_CURRENT_COLOR         params returns four values: the
                              red, green, blue, and alpha values
                              of the current color. Integer
                              values, if requested, are linearly
                              mapped from the internal floating-
                              point representation such that 1.0
                              returns the most positive
                              representable integer value, and
                              -1.0 returns the most negative
                              representable integer value. See
                              glColor. The initial value is (1,
                              1, 1, 1).

     GL_CURRENT_INDEX         params returns one value, the
                              current color index. The initial
                              value is 1. See glIndex.

     GL_CURRENT_NORMAL        params returns three values: the x,
                              y, and z values of the current nor-
                              mal. Integer values, if requested,
                              are linearly mapped from the inter-
                              nal floating-point representation
                              such that 1.0 returns the most
                              positive representable integer
                              value, and -1.0 returns the most
                              negative representable integer
                              value. The initial value is (0, 0,
                              1). See glNormal.

     GL_CURRENT_RASTER_COLOR  params returns four values: the
                              red, green, blue, and alpha values
                              of the current raster position.
                              Integer values, if requested, are
                              linearly mapped from the internal
                              floating-point representation such
                              that 1.0 returns the most positive
                              representable integer value, and
                              -1.0 returns the most negative
                              representable integer value. The
                              initial value is (1, 1, 1, 1). See
                              glRasterPos.

     GL_CURRENT_RASTER_DISTANCE
                              params returns one value, the

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                              distance from the eye to the
                              current raster position. The ini-
                              tial value is 0. See glRasterPos.

     GL_CURRENT_RASTER_INDEX  params returns one value, the color
                              index of the current raster posi-
                              tion. The initial value is 1. See
                              glRasterPos.

     GL_CURRENT_RASTER_POSITION
                              params returns four values: the x,
                              y, z, and w components of the
                              current raster position. x, y, and
                              z are in window coordinates, and w
                              is in clip coordinates. The initial
                              value is (0, 0, 0, 1). See
                              glRasterPos.

     GL_CURRENT_RASTER_POSITION_VALID
                              params returns a single boolean
                              value indicating whether the
                              current raster position is valid.
                              The initial value is GL_TRUE. See
                              glRasterPos.

     GL_CURRENT_RASTER_TEXTURE_COORDS
                              params returns four values: the s,
                              t, r, and q current raster texture
                              coordinates. The initial value is
                              (0, 0, 0, 1). See glRasterPos and
                              glTexCoord.

     GL_CURRENT_TEXTURE_COORDS
                              params returns four values: the s,
                              t, r, and q current texture coordi-
                              nates. The initial value is (0, 0,
                              0, 1). See glTexCoord.

     GL_DEPTH_BIAS            params returns one value, the depth
                              bias factor used during pixel
                              transfers. The initial value is 0.
                              See glPixelTransfer.

     GL_DEPTH_BITS            params returns one value, the
                              number of bitplanes in the depth
                              buffer.

     GL_DEPTH_CLEAR_VALUE     params returns one value, the value
                              that is used to clear the depth
                              buffer. Integer values, if
                              requested, are linearly mapped from
                              the internal floating-point

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                              representation such that 1.0
                              returns the most positive
                              representable integer value, and
                              -1.0 returns the most negative
                              representable integer value. The
                              initial value is 1. See
                              glClearDepth.

     GL_DEPTH_FUNC            params returns one value, the sym-
                              bolic constant that indicates the
                              depth comparison function. The ini-
                              tial value is GL_LESS. See
                              glDepthFunc.

     GL_DEPTH_RANGE           params returns two values: the near
                              and far mapping limits for the
                              depth buffer. Integer values, if
                              requested, are linearly mapped from
                              the internal floating-point
                              representation such that 1.0
                              returns the most positive
                              representable integer value, and
                              -1.0 returns the most negative
                              representable integer value. The
                              initial value is (0, 1). See
                              glDepthRange.

     GL_DEPTH_SCALE           params returns one value, the depth
                              scale factor used during pixel
                              transfers. The initial value is 1.
                              See glPixelTransfer.

     GL_DEPTH_TEST            params returns a single boolean
                              value indicating whether depth
                              testing of fragments is enabled.
                              The initial value is GL_FALSE. See
                              glDepthFunc and glDepthRange.

     GL_DEPTH_WRITEMASK       params returns a single boolean
                              value indicating if the depth
                              buffer is enabled for writing. The
                              initial value is GL_TRUE. See
                              glDepthMask.

     GL_DITHER                params returns a single boolean
                              value indicating whether dithering
                              of fragment colors and indices is
                              enabled. The initial value is
                              GL_TRUE.

     GL_DOUBLEBUFFER          params returns a single boolean
                              value indicating whether double

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                              buffering is supported.

     GL_DRAW_BUFFER           params returns one value, a sym-
                              bolic constant indicating which
                              buffers are being drawn to. See
                              glDrawBuffer. The initial value is
                              GL_BACK if there are back buffers,
                              otherwise it is GL_FRONT.

     GL_EDGE_FLAG             params returns a single boolean
                              value indicating whether the
                              current edge flag is GL_TRUE or
                              GL_FALSE. The initial value is
                              GL_TRUE. See glEdgeFlag.

     GL_EDGE_FLAG_ARRAY       params returns a single boolean
                              value indicating whether the edge
                              flag array is enabled. The initial
                              value is GL_FALSE. See
                              glEdgeFlagPointer.

     GL_EDGE_FLAG_ARRAY_STRIDE
                              params returns one value, the byte
                              offset between consecutive edge
                              flags in the edge flag array. The
                              initial value is 0. See
                              glEdgeFlagPointer.

     GL_FEEDBACK_BUFFER_SIZE  params returns one value, the size
                              of the feedback buffer.  See
                              glFeedbackBuffer.

     GL_FEEDBACK_BUFFER_TYPE  params returns one value, the type
                              of the feedback buffer.  See
                              glFeedbackBuffer.

     GL_FOG                   params returns a single boolean
                              value indicating whether fogging is
                              enabled. The initial value is
                              GL_FALSE. See glFog.

     GL_FOG_COLOR             params returns four values: the
                              red, green, blue, and alpha com-
                              ponents of the fog color. Integer
                              values, if requested, are linearly
                              mapped from the internal floating-
                              point representation such that 1.0
                              returns the most positive
                              representable integer value, and
                              -1.0 returns the most negative
                              representable integer value. The
                              initial value is (0, 0, 0, 0). See

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                              glFog.

     GL_FOG_DENSITY           params returns one value, the fog
                              density parameter. The initial
                              value is 1. See glFog.

     GL_FOG_END               params returns one value, the end
                              factor for the linear fog equation.
                              The initial value is 1. See glFog.

     GL_FOG_HINT              params returns one value, a sym-
                              bolic constant indicating the mode
                              of the fog hint. The initial value
                              is GL_DONT_CARE. See glHint.

     GL_FOG_INDEX             params returns one value, the fog
                              color index. The initial value is
                              0. See glFog.

     GL_FOG_MODE              params returns one value, a sym-
                              bolic constant indicating which fog
                              equation is selected. The initial
                              value is GL_EXP. See glFog.

     GL_FOG_START             params returns one value, the start
                              factor for the linear fog equation.
                              The initial value is 0. See glFog.

     GL_FRONT_FACE            params returns one value, a sym-
                              bolic constant indicating whether
                              clockwise or counterclockwise
                              polygon winding is treated as
                              front-facing. The initial value is
                              GL_CCW. See glFrontFace.

     GL_GREEN_BIAS            params returns one value, the green
                              bias factor used during pixel
                              transfers. The initial value is 0.

     GL_GREEN_BITS            params returns one value, the
                              number of green bitplanes in each
                              color buffer.

     GL_GREEN_SCALE           params returns one value, the green
                              scale factor used during pixel
                              transfers. The initial value is 1.
                              See glPixelTransfer.

     GL_HISTOGRAM             params returns a single boolean
                              value indicating whether histogram
                              is enabled. The initial value is
                              GL_FALSE. See glHistogram.

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     GL_INDEX_ARRAY           params returns a single boolean
                              value indicating whether the color
                              index array is enabled. The initial
                              value is GL_FALSE. See
                              glIndexPointer.

     GL_INDEX_ARRAY_STRIDE    params returns one value, the byte
                              offset between consecutive color
                              indexes in the color index array.
                              The initial value is 0. See
                              glIndexPointer.

     GL_INDEX_ARRAY_TYPE      params returns one value, the data
                              type of indexes in the color index
                              array. The initial value is
                              GL_FLOAT. See glIndexPointer.

     GL_INDEX_BITS            params returns one value, the
                              number of bitplanes in each color
                              index buffer.

     GL_INDEX_CLEAR_VALUE     params returns one value, the color
                              index used to clear the color index
                              buffers. The initial value is 0.
                              See glClearIndex.

     GL_INDEX_LOGIC_OP        params returns a single boolean
                              value indicating whether a
                              fragment's index values are merged
                              into the framebuffer using a logi-
                              cal operation. The initial value is
                              GL_FALSE. See glLogicOp.

     GL_INDEX_MODE            params returns a single boolean
                              value indicating whether the GL is
                              in color index mode (GL_TRUE) or
                              RGBA mode (GL_FALSE).

     GL_INDEX_OFFSET          params returns one value, the
                              offset added to color and stencil
                              indices during pixel transfers. The
                              initial value is 0. See
                              glPixelTransfer.

     GL_INDEX_SHIFT           params returns one value, the
                              amount that color and stencil
                              indices are shifted during pixel
                              transfers. The initial value is 0.
                              See glPixelTransfer.

     GL_INDEX_WRITEMASK       params returns one value, a mask
                              indicating which bitplanes of each

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                              color index buffer can be written.
                              The initial value is all 1's. See
                              glIndexMask.

     GL_LIGHTi                params returns a single boolean
                              value indicating whether the speci-
                              fied light is enabled. The initial
                              value is GL_FALSE. See glLight and
                              glLightModel.

     GL_LIGHTING              params returns a single boolean
                              value indicating whether lighting
                              is enabled. The initial value is
                              GL_FALSE. See glLightModel.

     GL_LIGHT_MODEL_AMBIENT   params returns four values: the
                              red, green, blue, and alpha com-
                              ponents of the ambient intensity of
                              the entire scene. Integer values,
                              if requested, are linearly mapped
                              from the internal floating-point
                              representation such that 1.0
                              returns the most positive
                              representable integer value, and
                              -1.0 returns the most negative
                              representable integer value. The
                              initial value is (0.2, 0.2, 0.2,
                              1.0). See glLightModel.

     GL_LIGHT_MODEL_COLOR_CONTROL
                              params returns single enumerated
                              value indicating whether specular
                              reflection calculations are
                              separated from normal lighting com-
                              putations. The initial value is
                              GL_SINGLE_COLOR.

     GL_LIGHT_MODEL_LOCAL_VIEWER
                              params returns a single boolean
                              value indicating whether specular
                              reflection calculations treat the
                              viewer as being local to the scene.
                              The initial value is GL_FALSE. See
                              glLightModel.

     GL_LIGHT_MODEL_TWO_SIDE  params returns a single boolean
                              value indicating whether separate
                              materials are used to compute
                              lighting for front- and back-facing
                              polygons. The initial value is
                              GL_FALSE. See glLightModel.

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     GL_LINE_SMOOTH           params returns a single boolean
                              value indicating whether antialias-
                              ing of lines is enabled. The ini-
                              tial value is GL_FALSE. See
                              glLineWidth.

     GL_LINE_SMOOTH_HINT      params returns one value, a sym-
                              bolic constant indicating the mode
                              of the line antialiasing hint. The
                              initial value is GL_DONT_CARE. See
                              glHint.

     GL_LINE_STIPPLE          params returns a single boolean
                              value indicating whether stippling
                              of lines is enabled. The initial
                              value is GL_FALSE. See
                              glLineStipple.

     GL_LINE_STIPPLE_PATTERN  params returns one value, the 16-
                              bit line stipple pattern. The ini-
                              tial value is all 1's. See
                              glLineStipple.

     GL_LINE_STIPPLE_REPEAT   params returns one value, the line
                              stipple repeat factor. The initial
                              value is 1. See glLineStipple.

     GL_LINE_WIDTH            params returns one value, the line
                              width as specified with
                              glLineWidth. The initial value is
                              1.

     GL_LINE_WIDTH_GRANULARITY
                              params returns one value, the width
                              difference between adjacent sup-
                              ported widths for antialiased
                              lines. See glLineWidth.

     GL_LINE_WIDTH_RANGE      params returns two values: the
                              smallest and largest supported
                              widths for antialiased lines. See
                              glLineWidth.

     GL_LIST_BASE             params returns one value, the base
                              offset added to all names in arrays
                              presented to glCallLists. The ini-
                              tial value is 0. See glListBase.

     GL_LIST_INDEX            params returns one value, the name
                              of the display list currently under
                              construction. 0 is returned if no
                              display list is currently under

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                              construction. The initial value is
                              0. See glNewList.

     GL_LIST_MODE             params returns one value, a sym-
                              bolic constant indicating the con-
                              struction mode of the display list
                              currently under construction. The
                              initial value is 0. See glNewList.

     GL_LOGIC_OP_MODE         params returns one value, a sym-
                              bolic constant indicating the
                              selected logic operation mode. The
                              initial value is GL_COPY. See
                              glLogicOp.

     GL_MAP1_COLOR_4          params returns a single boolean
                              value indicating whether 1D evalua-
                              tion generates colors. The initial
                              value is GL_FALSE. See glMap1.

     GL_MAP1_GRID_DOMAIN      params returns two values: the end-
                              points of the 1D map's grid domain.
                              The initial value is (0, 1). See
                              glMapGrid.

     GL_MAP1_GRID_SEGMENTS    params returns one value, the
                              number of partitions in the 1D
                              map's grid domain. The initial
                              value is 1. See glMapGrid.

     GL_MAP1_INDEX            params returns a single boolean
                              value indicating whether 1D evalua-
                              tion generates color indices. The
                              initial value is GL_FALSE. See
                              glMap1.

     GL_MAP1_NORMAL           params returns a single boolean
                              value indicating whether 1D evalua-
                              tion generates normals. The initial
                              value is GL_FALSE. See glMap1.

     GL_MAP1_TEXTURE_COORD_1  params returns a single boolean
                              value indicating whether 1D evalua-
                              tion generates 1D texture coordi-
                              nates. The initial value is
                              GL_FALSE. See glMap1.

     GL_MAP1_TEXTURE_COORD_2  params returns a single boolean
                              value indicating whether 1D evalua-
                              tion generates 2D texture coordi-
                              nates. The initial value is
                              GL_FALSE. See glMap1.

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     GL_MAP1_TEXTURE_COORD_3  params returns a single boolean
                              value indicating whether 1D evalua-
                              tion generates 3D texture coordi-
                              nates. The initial value is
                              GL_FALSE. See glMap1.

     GL_MAP1_TEXTURE_COORD_4  params returns a single boolean
                              value indicating whether 1D evalua-
                              tion generates 4D texture coordi-
                              nates. The initial value is
                              GL_FALSE. See glMap1.

     GL_MAP1_VERTEX_3         params returns a single boolean
                              value indicating whether 1D evalua-
                              tion generates 3D vertex coordi-
                              nates. The initial value is
                              GL_FALSE. See glMap1.

     GL_MAP1_VERTEX_4         params returns a single boolean
                              value indicating whether 1D evalua-
                              tion generates 4D vertex coordi-
                              nates. The initial value is
                              GL_FALSE. See glMap1.

     GL_MAP2_COLOR_4          params returns a single boolean
                              value indicating whether 2D evalua-
                              tion generates colors. The initial
                              value is GL_FALSE. See glMap2.

     GL_MAP2_GRID_DOMAIN      params returns four values: the
                              endpoints of the 2D map's i and j
                              grid domains. The initial value is
                              (0,1; 0,1). See glMapGrid.

     GL_MAP2_GRID_SEGMENTS    params returns two values: the
                              number of partitions in the 2D
                              map's i and j grid domains. The
                              initial value is (1,1). See
                              glMapGrid.

     GL_MAP2_INDEX            params returns a single boolean
                              value indicating whether 2D evalua-
                              tion generates color indices. The
                              initial value is GL_FALSE. See
                              glMap2.

     GL_MAP2_NORMAL           params returns a single boolean
                              value indicating whether 2D evalua-
                              tion generates normals. The initial
                              value is GL_FALSE. See glMap2.

     GL_MAP2_TEXTURE_COORD_1  params returns a single boolean

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                              value indicating whether 2D evalua-
                              tion generates 1D texture coordi-
                              nates. The initial value is
                              GL_FALSE. See glMap2.

     GL_MAP2_TEXTURE_COORD_2  params returns a single boolean
                              value indicating whether 2D evalua-
                              tion generates 2D texture coordi-
                              nates. The initial value is
                              GL_FALSE. See glMap2.

     GL_MAP2_TEXTURE_COORD_3  params returns a single boolean
                              value indicating whether 2D evalua-
                              tion generates 3D texture coordi-
                              nates. The initial value is
                              GL_FALSE. See glMap2.

     GL_MAP2_TEXTURE_COORD_4  params returns a single boolean
                              value indicating whether 2D evalua-
                              tion generates 4D texture coordi-
                              nates. The initial value is
                              GL_FALSE. See glMap2.

     GL_MAP2_VERTEX_3         params returns a single boolean
                              value indicating whether 2D evalua-
                              tion generates 3D vertex coordi-
                              nates. The initial value is
                              GL_FALSE. See glMap2.

     GL_MAP2_VERTEX_4         params returns a single boolean
                              value indicating whether 2D evalua-
                              tion generates 4D vertex coordi-
                              nates. The initial value is
                              GL_FALSE. See glMap2.

     GL_MAP_COLOR             params returns a single boolean
                              value indicating if colors and
                              color indices are to be replaced by
                              table lookup during pixel
                              transfers. The initial value is
                              GL_FALSE. See glPixelTransfer.

     GL_MAP_STENCIL           params returns a single boolean
                              value indicating if stencil indices
                              are to be replaced by table lookup
                              during pixel transfers. The initial
                              value is GL_FALSE. See
                              glPixelTransfer.

     GL_MATRIX_MODE           params returns one value, a sym-
                              bolic constant indicating which
                              matrix stack is currently the

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                              target of all matrix operations.
                              The initial value is GL_MODELVIEW.
                              See glMatrixMode.

     GL_MAX_3D_TEXTURE_SIZE   params returns one value, a rough
                              estimate of the largest 3D texture
                              that the GL can handle. If the GL
                              version is 1.2 or greater, use
                              GL_PROXY_TEXTURE_3D to determine if
                              a texture is too large. See
                              glTexImage3D.

     GL_MAX_CLIENT_ATTRIB_STACK_DEPTH
                              params returns one value indicating
                              the maximum supported depth of the
                              client attribute stack. See
                              glPushClientAttrib.

     GL_MAX_ATTRIB_STACK_DEPTH
                              params returns one value, the max-
                              imum supported depth of the attri-
                              bute stack. The value must be at
                              least 16. See glPushAttrib.

     GL_MAX_CLIP_PLANES       params returns one value, the max-
                              imum number of application-defined
                              clipping planes. The value must be
                              at least 6. See glClipPlane.

     GL_MAX_COLOR_MATRIX_STACK_DEPTH
                              params returns one value, the max-
                              imum supported depth of the color
                              matrix stack.  The value must be at
                              least 2. See glPushMatrix.

     GL_MAX_ELEMENTS_INDICES  params returns one value, the
                              recommended maximum number of ver-
                              tex array indices.  See
                              glDrawRangeElements.

     GL_MAX_ELEMENTS_VERTICES params returns one value, the
                              recommended maximum number of ver-
                              tex array vertices.  See
                              glDrawRangeElements.

     GL_MAX_EVAL_ORDER        params returns one value, the max-
                              imum equation order supported by 1D
                              and 2D evaluators. The value must
                              be at least 8. See glMap1 and
                              glMap2.

     GL_MAX_LIGHTS            params returns one value, the

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                              maximum number of lights. The value
                              must be at least 8. See glLight.

     GL_MAX_LIST_NESTING      params returns one value, the max-
                              imum recursion depth allowed during
                              display-list traversal. The value
                              must be at least 64. See
                              glCallList.

     GL_MAX_MODELVIEW_STACK_DEPTH
                              params returns one value, the max-
                              imum supported depth of the model-
                              view matrix stack. The value must
                              be at least 32. See glPushMatrix.

     GL_MAX_NAME_STACK_DEPTH  params returns one value, the max-
                              imum supported depth of the selec-
                              tion name stack. The value must be
                              at least 64. See glPushName.

     GL_MAX_PIXEL_MAP_TABLE   params returns one value, the max-
                              imum supported size of a glPixelMap
                              lookup table. The value must be at
                              least 32. See glPixelMap.

     GL_MAX_PROJECTION_STACK_DEPTH
                              params returns one value, the max-
                              imum supported depth of the projec-
                              tion matrix stack. The value must
                              be at least 2. See glPushMatrix.

     GL_MAX_TEXTURE_SIZE      params returns one value. The value
                              gives a rough estimate of the larg-
                              est texture that the GL can handle.
                              If the GL version is 1.1 or
                              greater, use GL_PROXY_TEXTURE_1D or
                              GL_PROXY_TEXTURE_2D to determine if
                              a texture is too large. See
                              glTexImage1D and glTexImage2D.

     GL_MAX_TEXTURE_STACK_DEPTH
                              params returns one value, the max-
                              imum supported depth of the texture
                              matrix stack. The value must be at
                              least 2. See glPushMatrix.

     GL_MAX_TEXTURE_UNITS_ARB params returns a single value indi-
                              cating the number of texture units
                              supported. The value must be at
                              least 1. See glActiveTextureARB.

     GL_MAX_VIEWPORT_DIMS     params returns two values: the

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                              maximum supported width and height
                              of the viewport. These must be at
                              least as large as the visible
                              dimensions of the display being
                              rendered to. See glViewport.

     GL_MINMAX                params returns a single boolean
                              value indicating whether pixel min-
                              max values are computed.  The ini-
                              tial value is GL_FALSE. See
                              glMinmax.

     GL_MODELVIEW_MATRIX      params returns sixteen values: the
                              modelview matrix on the top of the
                              modelview matrix stack. Initially
                              this matrix is the identity matrix.
                              See glPushMatrix.

     GL_MODELVIEW_STACK_DEPTH params returns one value, the
                              number of matrices on the modelview
                              matrix stack. The initial value is
                              1. See glPushMatrix.

     GL_NAME_STACK_DEPTH      params returns one value, the
                              number of names on the selection
                              name stack. The initial value is 0.
                              See glPushName.

     GL_NORMAL_ARRAY          params returns a single boolean
                              value, indicating whether the nor-
                              mal array is enabled. The initial
                              value is GL_FALSE. See
                              glNormalPointer.

     GL_NORMAL_ARRAY_STRIDE   params returns one value, the byte
                              offset between consecutive normals
                              in the normal array. The initial
                              value is 0. See glNormalPointer.

     GL_NORMAL_ARRAY_TYPE     params returns one value, the data
                              type of each coordinate in the nor-
                              mal array. The initial value is
                              GL_FLOAT. See glNormalPointer.

     GL_NORMALIZE             params returns a single boolean
                              value indicating whether normals
                              are automatically scaled to unit
                              length after they have been
                              transformed to eye coordinates. The
                              initial value is GL_FALSE. See
                              glNormal.

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     GL_PACK_ALIGNMENT        params returns one value, the byte
                              alignment used for writing pixel
                              data to memory. The initial value
                              is 4. See glPixelStore.

     GL_PACK_IMAGE_HEIGHT     params returns one value, the image
                              height used for writing pixel data
                              to memory.  The initial value is 0.
                              See glPixelStore.

     GL_PACK_LSB_FIRST        params returns a single boolean
                              value indicating whether single-bit
                              pixels being written to memory are
                              written first to the least signifi-
                              cant bit of each unsigned byte. The
                              initial value is GL_FALSE. See
                              glPixelStore.

     GL_PACK_ROW_LENGTH       params returns one value, the row
                              length used for writing pixel data
                              to memory. The initial value is 0.
                              See glPixelStore.

     GL_PACK_SKIP_IMAGES      params returns one value, the
                              number of pixel images skipped
                              before the first pixel is written
                              into memory. The initial value is
                              0. See glPixelStore.

     GL_PACK_SKIP_PIXELS      params returns one value, the
                              number of pixel locations skipped
                              before the first pixel is written
                              into memory. The initial value is
                              0. See glPixelStore.

     GL_PACK_SKIP_ROWS        params returns one value, the
                              number of rows of pixel locations
                              skipped before the first pixel is
                              written into memory. The initial
                              value is 0. See glPixelStore.

     GL_PACK_SWAP_BYTES       params returns a single boolean
                              value indicating whether the bytes
                              of two-byte and four-byte pixel
                              indices and components are swapped
                              before being written to memory. The
                              initial value is GL_FALSE. See
                              glPixelStore.

     GL_PERSPECTIVE_CORRECTION_HINT
                              params returns one value, a sym-
                              bolic constant indicating the mode

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                              of the perspective correction hint.
                              The initial value is GL_DONT_CARE.
                              See glHint.

     GL_PIXEL_MAP_A_TO_A_SIZE params returns one value, the size
                              of the alpha-to-alpha pixel trans-
                              lation table. The initial value is
                              1. See glPixelMap.

     GL_PIXEL_MAP_B_TO_B_SIZE params returns one value, the size
                              of the blue-to-blue pixel transla-
                              tion table. The initial value is 1.
                              See glPixelMap.

     GL_PIXEL_MAP_G_TO_G_SIZE params returns one value, the size
                              of the green-to-green pixel trans-
                              lation table. The initial value is
                              1. See glPixelMap.

     GL_PIXEL_MAP_I_TO_A_SIZE params returns one value, the size
                              of the index-to-alpha pixel trans-
                              lation table. The initial value is
                              1. See glPixelMap.

     GL_PIXEL_MAP_I_TO_B_SIZE params returns one value, the size
                              of the index-to-blue pixel transla-
                              tion table. The initial value is 1.
                              See glPixelMap.

     GL_PIXEL_MAP_I_TO_G_SIZE params returns one value, the size
                              of the index-to-green pixel trans-
                              lation table. The initial value is
                              1. See glPixelMap.

     GL_PIXEL_MAP_I_TO_I_SIZE params returns one value, the size
                              of the index-to-index pixel trans-
                              lation table. The initial value is
                              1. See glPixelMap.

     GL_PIXEL_MAP_I_TO_R_SIZE params returns one value, the size
                              of the index-to-red pixel transla-
                              tion table. The initial value is 1.
                              See glPixelMap.

     GL_PIXEL_MAP_R_TO_R_SIZE params returns one value, the size
                              of the red-to-red pixel translation
                              table. The initial value is 1. See
                              glPixelMap.

     GL_PIXEL_MAP_S_TO_S_SIZE params returns one value, the size
                              of the stencil-to-stencil pixel
                              translation table. The initial

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                              value is 1. See glPixelMap.

     GL_POINT_SIZE            params returns one value, the point
                              size as specified by glPointSize.
                              The initial value is 1.

     GL_POINT_SIZE_GRANULARITY
                              params returns one value, the size
                              difference between adjacent sup-
                              ported sizes for antialiased
                              points. See glPointSize.

     GL_POINT_SIZE_RANGE      params returns two values: the
                              smallest and largest supported
                              sizes for antialiased points. The
                              smallest size must be at most 1,
                              and the largest size must be at
                              least 1. See glPointSize.

     GL_POINT_SMOOTH          params returns a single boolean
                              value indicating whether antialias-
                              ing of points is enabled. The ini-
                              tial value is GL_FALSE. See
                              glPointSize.

     GL_POINT_SMOOTH_HINT     params returns one value, a sym-
                              bolic constant indicating the mode
                              of the point antialiasing hint. The
                              initial value is GL_DONT_CARE. See
                              glHint.

     GL_POLYGON_MODE          params returns two values: symbolic
                              constants indicating whether
                              front-facing and back-facing
                              polygons are rasterized as points,
                              lines, or filled polygons. The ini-
                              tial value is GL_FILL. See
                              glPolygonMode.

     GL_POLYGON_OFFSET_FACTOR params returns one value, the scal-
                              ing factor used to determine the
                              variable offset that is added to
                              the depth value of each fragment
                              generated when a polygon is raster-
                              ized. The initial value is 0. See
                              glPolygonOffset.

     GL_POLYGON_OFFSET_UNITS  params returns one value. This
                              value is multiplied by an
                              implementation-specific value and
                              then added to the depth value of
                              each fragment generated when a

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                              polygon is rasterized. The initial
                              value is 0. See glPolygonOffset.

     GL_POLYGON_OFFSET_FILL   params returns a single boolean
                              value indicating whether polygon
                              offset is enabled for polygons in
                              fill mode. The initial value is
                              GL_FALSE. See glPolygonOffset.

     GL_POLYGON_OFFSET_LINE   params returns a single boolean
                              value indicating whether polygon
                              offset is enabled for polygons in
                              line mode. The initial value is
                              GL_FALSE. See glPolygonOffset.

     GL_POLYGON_OFFSET_POINT  params returns a single boolean
                              value indicating whether polygon
                              offset is enabled for polygons in
                              point mode. The initial value is
                              GL_FALSE. See glPolygonOffset.

     GL_POLYGON_SMOOTH        params returns a single boolean
                              value indicating whether antialias-
                              ing of polygons is enabled. The
                              initial value is GL_FALSE. See
                              glPolygonMode.

     GL_POLYGON_SMOOTH_HINT   params returns one value, a sym-
                              bolic constant indicating the mode
                              of the polygon antialiasing hint.
                              The initial value is GL_DONT_CARE.
                              See glHint.

     GL_POLYGON_STIPPLE       params returns a single boolean
                              value indicating whether polygon
                              stippling is enabled. The initial
                              value is GL_FALSE. See
                              glPolygonStipple.

     GL_POST_COLOR_MATRIX_COLOR_TABLE
                              params returns a single boolean
                              value indicating whether post color
                              matrix transformation lookup is
                              enabled. The initial value is
                              GL_FALSE. See glColorTable.

     GL_POST_COLOR_MATRIX_RED_BIAS
                              params returns one value, the red
                              bias factor applied to RGBA frag-
                              ments after color matrix transfor-
                              mations. The initial value is 0.
                              See glPixelTransfer.

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     GL_POST_COLOR_MATRIX_GREEN_BIAS
                              params returns one value, the green
                              bias factor applied to RGBA frag-
                              ments after color matrix transfor-
                              mations. The initial value is 0.
                              See glPixelTransfer

     GL_POST_COLOR_MATRIX_BLUE_BIAS
                              params returns one value, the blue
                              bias factor applied to RGBA frag-
                              ments after color matrix transfor-
                              mations. The initial value is 0.
                              See glPixelTransfer.

     GL_POST_COLOR_MATRIX_ALPHA_BIAS
                              params returns one value, the alpha
                              bias factor applied to RGBA frag-
                              ments after color matrix transfor-
                              mations. The initial value is 0.
                              See glPixelTransfer.

     GL_POST_COLOR_MATRIX_RED_SCALE
                              params returns one value, the red
                              scale factor applied to RGBA frag-
                              ments after color matrix transfor-
                              mations. The initial value is 1.
                              See glPixelTransfer.

     GL_POST_COLOR_MATRIX_GREEN_SCALE
                              params returns one value, the green
                              scale factor applied to RGBA frag-
                              ments after color matrix transfor-
                              mations. The initial value is 1.
                              See glPixelTransfer.

     GL_POST_COLOR_MATRIX_BLUE_SCALE
                              params returns one value, the blue
                              scale factor applied to RGBA frag-
                              ments after color matrix transfor-
                              mations. The initial value is 1.
                              See glPixelTransfer.

     GL_POST_COLOR_MATRIX_ALPHA_SCALE
                              params returns one value, the alpha
                              scale factor applied to RGBA frag-
                              ments after color matrix transfor-
                              mations. The initial value is 1.
                              See glPixelTransfer.

     GL_POST_CONVOLUTION_COLOR_TABLE
                              params returns a single boolean
                              value indicating whether post

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                              convolution lookup is enabled. The
                              initial value is GL_FALSE. See
                              glColorTable.

     GL_POST_CONVOLUTION_RED_BIAS
                              params returns one value, the red
                              bias factor applied to RGBA frag-
                              ments after convolution. The ini-
                              tial value is 0. See
                              glPixelTransfer.

     GL_POST_CONVOLUTION_GREEN_BIAS
                              params returns one value, the green
                              bias factor applied to RGBA frag-
                              ments after convolution. The ini-
                              tial value is 0. See
                              glPixelTransfer.

     GL_POST_CONVOLUTION_BLUE_BIAS
                              params returns one value, the blue
                              bias factor applied to RGBA frag-
                              ments after convolution. The ini-
                              tial value is 0. See
                              glPixelTransfer.

     GL_POST_CONVOLUTION_ALPHA_BIAS
                              params returns one value, the alpha
                              bias factor applied to RGBA frag-
                              ments after convolution. The ini-
                              tial value is 0. See
                              glPixelTransfer.

     GL_POST_CONVOLUTION_RED_SCALE
                              params returns one value, the red
                              scale factor applied to RGBA frag-
                              ments after convolution. The ini-
                              tial value is 1. See
                              glPixelTransfer.

     GL_POST_CONVOLUTION_GREEN_SCALE
                              params returns one value, the green
                              scale factor applied to RGBA frag-
                              ments after convolution. The ini-
                              tial value is 1. See
                              glPixelTransfer.

     GL_POST_CONVOLUTION_BLUE_SCALE
                              params returns one value, the blue
                              scale factor applied to RGBA frag-
                              ments after convolution. The ini-
                              tial value is 1. See
                              glPixelTransfer.

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     GL_POST_CONVOLUTION_ALPHA_SCALE
                              params returns one value, the alpha
                              scale factor applied to RGBA frag-
                              ments after convolution. The ini-
                              tial value is 1. See
                              glPixelTransfer.

     GL_PROJECTION_MATRIX     params returns sixteen values: the
                              projection matrix on the top of the
                              projection matrix stack. Initially
                              this matrix is the identity matrix.
                              See glPushMatrix.

     GL_PROJECTION_STACK_DEPTH
                              params returns one value, the
                              number of matrices on the projec-
                              tion matrix stack. The initial
                              value is 1. See glPushMatrix.

     GL_READ_BUFFER           params returns one value, a sym-
                              bolic constant indicating which
                              color buffer is selected for read-
                              ing. The initial value is GL_BACK
                              if there is a back buffer, other-
                              wise it is GL_FRONT. See
                              glReadPixels and glAccum.

     GL_RED_BIAS              params returns one value, the red
                              bias factor used during pixel
                              transfers. The initial value is 0.

     GL_RED_BITS              params returns one value, the
                              number of red bitplanes in each
                              color buffer.

     GL_RED_SCALE             params returns one value, the red
                              scale factor used during pixel
                              transfers. The initial value is 1.
                              See glPixelTransfer.

     GL_RENDER_MODE           params returns one value, a sym-
                              bolic constant indicating whether
                              the GL is in render, select, or
                              feedback mode. The initial value is
                              GL_RENDER. See glRenderMode.

     GL_RESCALE_NORMAL        params returns single boolean value
                              indicating whether normal rescaling
                              is enabled. See glEnable.

     GL_RGBA_MODE             params returns a single boolean
                              value indicating whether the GL is

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                              in RGBA mode (true) or color index
                              mode (false). See glColor.

     GL_SCISSOR_BOX           params returns four values: the x
                              and y window coordinates of the
                              scissor box, followed by its width
                              and height. Initially the x and y
                              window coordinates are both 0 and
                              the width and height are set to the
                              size of the window. See glScissor.

     GL_SCISSOR_TEST          params returns a single boolean
                              value indicating whether scissoring
                              is enabled. The initial value is
                              GL_FALSE. See glScissor.

     GL_SELECTION_BUFFER_SIZE params return one value, the size
                              of the selection buffer. See
                              glSelectBuffer.

     GL_SEPARABLE_2D          params returns a single boolean
                              value indicating whether 2D separ-
                              able convolution is enabled. The
                              initial value is GL_FALSE. See
                              glSeparableFilter2D.

     GL_SHADE_MODEL           params returns one value, a sym-
                              bolic constant indicating whether
                              the shading mode is flat or smooth.
                              The initial value is GL_SMOOTH. See
                              glShadeModel.

     GL_SMOOTH_LINE_WIDTH_RANGE
                              params returns two values, the
                              smallest and largest supported
                              widths for antialiased lines. See
                              glLineWidth.

     GL_SMOOTH_LINE_WIDTH_GRANULARITY
                              params returns one value, the
                              granularity of widths for
                              antialiased lines. See glLineWidth.

     GL_SMOOTH_POINT_SIZE_RANGE
                              params returns two values, the
                              smallest and largest supported
                              widths for antialiased points. See
                              glPointSize.

     GL_SMOOTH_POINT_SIZE_GRANULARITY
                              params returns one value, the
                              granularity of sizes for

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                              antialiased points. See
                              glPointSize.

     GL_STENCIL_BITS          params returns one value, the
                              number of bitplanes in the stencil
                              buffer.

     GL_STENCIL_CLEAR_VALUE   params returns one value, the index
                              to which the stencil bitplanes are
                              cleared. The initial value is 0.
                              See glClearStencil.

     GL_STENCIL_FAIL          params returns one value, a sym-
                              bolic constant indicating what
                              action is taken when the stencil
                              test fails. The initial value is
                              GL_KEEP. See glStencilOp.

     GL_STENCIL_FUNC          params returns one value, a sym-
                              bolic constant indicating what
                              function is used to compare the
                              stencil reference value with the
                              stencil buffer value. The initial
                              value is GL_ALWAYS. See
                              glStencilFunc.

     GL_STENCIL_PASS_DEPTH_FAIL
                              params returns one value, a sym-
                              bolic constant indicating what
                              action is taken when the stencil
                              test passes, but the depth test
                              fails. The initial value is
                              GL_KEEP. See glStencilOp.

     GL_STENCIL_PASS_DEPTH_PASS
                              params returns one value, a sym-
                              bolic constant indicating what
                              action is taken when the stencil
                              test passes and the depth test
                              passes. The initial value is
                              GL_KEEP. See glStencilOp.

     GL_STENCIL_REF           params returns one value, the
                              reference value that is compared
                              with the contents of the stencil
                              buffer. The initial value is 0. See
                              glStencilFunc.

     GL_STENCIL_TEST          params returns a single boolean
                              value indicating whether stencil
                              testing of fragments is enabled.
                              The initial value is GL_FALSE. See

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                              glStencilFunc and glStencilOp.

     GL_STENCIL_VALUE_MASK    params returns one value, the mask
                              that is used to mask both the sten-
                              cil reference value and the stencil
                              buffer value before they are com-
                              pared. The initial value is all
                              1's. See glStencilFunc.

     GL_STENCIL_WRITEMASK     params returns one value, the mask
                              that controls writing of the sten-
                              cil bitplanes. The initial value is
                              all 1's. See glStencilMask.

     GL_STEREO                params returns a single boolean
                              value indicating whether stereo
                              buffers (left and right) are sup-
                              ported.

     GL_SUBPIXEL_BITS         params returns one value, an esti-
                              mate of the number of bits of sub-
                              pixel resolution that are used to
                              position rasterized geometry in
                              window coordinates. The initial
                              value
                              is 4.

     GL_TEXTURE_1D            params returns a single boolean
                              value indicating whether 1D texture
                              mapping is enabled. The initial
                              value is GL_FALSE. See
                              glTexImage1D.

     GL_TEXTURE_BINDING_1D    params returns a single value, the
                              name of the texture currently bound
                              to the target GL_TEXTURE_1D. The
                              initial value is 0. See
                              glBindTexture.

     GL_TEXTURE_2D            params returns a single boolean
                              value indicating whether 2D texture
                              mapping is enabled. The initial
                              value is GL_FALSE. See
                              glTexImage2D.

     GL_TEXTURE_BINDING_2D    params returns a single value, the
                              name of the texture currently bound
                              to the target GL_TEXTURE_2D. The
                              initial value is 0. See
                              glBindTexture.

     GL_TEXTURE_3D            params returns a single boolean

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                              value indicating whether 3D texture
                              mapping is enabled. The initial
                              value is GL_FALSE. See
                              glTexImage3D.

     GL_TEXTURE_BINDING_3D    params returns a single value, the
                              name of the texture currently bound
                              to the target GL_TEXTURE_3D. The
                              initial value is 0. See
                              glBindTexture.

     GL_TEXTURE_COORD_ARRAY   params returns a single boolean
                              value indicating whether the tex-
                              ture coordinate array is enabled.
                              The initial value is GL_FALSE. See
                              glTexCoordPointer.

     GL_TEXTURE_COORD_ARRAY_SIZE
                              params returns one value, the
                              number of coordinates per element
                              in the texture coordinate array.
                              The initial value is 4. See
                              glTexCoordPointer.

     GL_TEXTURE_COORD_ARRAY_STRIDE
                              params returns one value, the byte
                              offset between consecutive elements
                              in the texture coordinate array.
                              The initial value is 0. See
                              glTexCoordPointer.

     GL_TEXTURE_COORD_ARRAY_TYPE
                              params returns one value, the data
                              type of the coordinates in the tex-
                              ture coordinate array. The initial
                              value is GL_FLOAT. See
                              glTexCoordPointer.

     GL_TEXTURE_GEN_Q         params returns a single boolean
                              value indicating whether automatic
                              generation of the q texture coordi-
                              nate is enabled. The initial value
                              is GL_FALSE. See glTexGen.

     GL_TEXTURE_GEN_R         params returns a single boolean
                              value indicating whether automatic
                              generation of the r texture coordi-
                              nate is enabled. The initial value
                              is GL_FALSE. See glTexGen.

     GL_TEXTURE_GEN_S         params returns a single boolean
                              value indicating whether automatic

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                              generation of the S texture coordi-
                              nate is enabled. The initial value
                              is GL_FALSE. See glTexGen.

     GL_TEXTURE_GEN_T         params returns a single boolean
                              value indicating whether automatic
                              generation of the T texture coordi-
                              nate is enabled. The initial value
                              is GL_FALSE. See glTexGen.

     GL_TEXTURE_MATRIX        params returns sixteen values: the
                              texture matrix on the top of the
                              texture matrix stack. Initially
                              this matrix is the identity matrix.
                              See glPushMatrix.

     GL_TEXTURE_STACK_DEPTH   params returns one value, the
                              number of matrices on the texture
                              matrix stack. The initial value is
                              1. See glPushMatrix.

     GL_UNPACK_ALIGNMENT      params returns one value, the byte
                              alignment used for reading pixel
                              data from memory. The initial value
                              is 4. See glPixelStore.

     GL_UNPACK_IMAGE_HEIGHT   params returns one value, the image
                              height used for reading pixel data
                              from memory.  The initial is 0. See
                              glPixelStore.

     GL_UNPACK_LSB_FIRST      params returns a single boolean
                              value indicating whether single-bit
                              pixels being read from memory are
                              read first from the least signifi-
                              cant bit of each unsigned byte. The
                              initial value is GL_FALSE. See
                              glPixelStore.

     GL_UNPACK_ROW_LENGTH     params returns one value, the row
                              length used for reading pixel data
                              from memory. The initial value is
                              0. See glPixelStore.

     GL_UNPACK_SKIP_IMAGES    params returns one value, the
                              number of pixel images skipped
                              before the first pixel is read from
                              memory. The initial value is 0. See
                              glPixelStore.

     GL_UNPACK_SKIP_PIXELS    params returns one value, the
                              number of pixel locations skipped

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                              before the first pixel is read from
                              memory. The initial value is 0. See
                              glPixelStore.

     GL_UNPACK_SKIP_ROWS      params returns one value, the
                              number of rows of pixel locations
                              skipped before the first pixel is
                              read from memory. The initial value
                              is 0. See glPixelStore.

     GL_UNPACK_SWAP_BYTES     params returns a single boolean
                              value indicating whether the bytes
                              of two-byte and four-byte pixel
                              indices and components are swapped
                              after being read from memory. The
                              initial value is GL_FALSE. See
                              glPixelStore.

     GL_VERTEX_ARRAY          params returns a single boolean
                              value indicating whether the vertex
                              array is enabled. The initial value
                              is GL_FALSE. See glVertexPointer.

     GL_VERTEX_ARRAY_SIZE     params returns one value, the
                              number of coordinates per vertex in
                              the vertex array. The initial value
                              is 4. See glVertexPointer.

     GL_VERTEX_ARRAY_STRIDE   params returns one value, the byte
                              offset between consecutive vertices
                              in the vertex array. The initial
                              value is 0. See glVertexPointer.

     GL_VERTEX_ARRAY_TYPE     params returns one value, the data
                              type of each coordinate in the ver-
                              tex array. The initial value is
                              GL_FLOAT. See glVertexPointer.

     GL_VIEWPORT              params returns four values: the x
                              and y window coordinates of the
                              viewport, followed by its width and
                              height. Initially the x and y win-
                              dow coordinates are both set to 0,
                              and the width and height are set to
                              the width and height of the window
                              into which the GL will do its
                              rendering. See glViewport.

     GL_ZOOM_X                params returns one value, the x
                              pixel zoom factor. The initial
                              value is 1. See glPixelZoom.

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     GL_ZOOM_Y                params returns one value, the y
                              pixel zoom factor. The initial
                              value is 1. See glPixelZoom.

     Many of the boolean parameters can also be queried more
     easily using glIsEnabled.

NOTES

     GL_COLOR_LOGIC_OP, GL_COLOR_ARRAY, GL_COLOR_ARRAY_SIZE,
     GL_COLOR_ARRAY_STRIDE, GL_COLOR_ARRAY_TYPE,
     GL_EDGE_FLAG_ARRAY, GL_EDGE_FLAG_ARRAY_STRIDE,
     GL_INDEX_ARRAY, GL_INDEX_ARRAY_STRIDE, GL_INDEX_ARRAY_TYPE,
     GL_INDEX_LOGIC_OP, GL_NORMAL_ARRAY, GL_NORMAL_ARRAY_STRIDE,
     GL_NORMAL_ARRAY_TYPE, GL_POLYGON_OFFSET_UNITS,
     GL_POLYGON_OFFSET_FACTOR, GL_POLYGON_OFFSET_FILL,
     GL_POLYGON_OFFSET_LINE, GL_POLYGON_OFFSET_POINT,
     GL_TEXTURE_COORD_ARRAY, GL_TEXTURE_COORD_ARRAY_SIZE,
     GL_TEXTURE_COORD_ARRAY_STRIDE, GL_TEXTURE_COORD_ARRAY_TYPE,
     GL_VERTEX_ARRAY, GL_VERTEX_ARRAY_SIZE,
     GL_VERTEX_ARRAY_STRIDE, and GL_VERTEX_ARRAY_TYPE are avail-
     able only if the GL version is 1.1 or greater.

     GL_ALIASED_POINT_SIZE_RANGE,
     GL_ALIASED_POINT_SIZE_GRANULARITY, GL_FEEDBACK_BUFFER_SIZE,
     GL_FEEDBACK_BUFFER_TYPE, GL_LIGHT_MODEL_AMBIENT,
     GL_LIGHT_MODEL_COLOR_CONTROL, GL_MAX_3D_TEXTURE_SIZE,
     GL_MAX_ELEMENTS_INDICES, GL_MAX_ELEMENTS_VERTICES,
     GL_PACK_IMAGE_HEIGHT, GL_PACK_SKIP_IMAGES,
     GL_RESCALE_NORMAL, GL_SELECTION_BUFFER_SIZE,
     GL_SMOOTH_LINE_WIDTH_GRANULARITY,
     GL_SMOOTH_LINE_WIDTH_RANGE,
     GL_SMOOTH_POINT_SIZE_GRANULARITY,
     GL_SMOOTH_POINT_SIZE_RANGE, GL_TEXTURE_3D,
     GL_TEXTURE_BINDING_3D, GL_UNPACK_IMAGE_HEIGHT, and
     GL_UNPACK_SKIP_IMAGES are available only if the GL version
     is 1.2 or greater.

     GL_LINE_WIDTH_GRANULARITY was deprecated in GL version 1.2.
     Its functionality was replaced by
     GL_SMOOTH_LINE_WIDTH_GRANULARITY.

     GL_LINE_WIDTH_RANGE was deprecated in GL version 1.2.  Its
     functionality was replaced by GL_SMOOTH_LINE_WIDTH_RANGE.

     GL_POINT_SIZE_GRANULARITY was deprecated in GL version 1.2.
     Its functionality was replaced by
     GL_SMOOTH_POINT_SIZE_GRANULARITY.

     GL_POINT_SIZE_RANGE was deprecated in GL version 1.2.  Its
     functionality was replaced by GL_SMOOTH_POINT_SIZE_RANGE.

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     GL_BLEND_COLOR, GL_BLEND_EQUATION, GL_COLOR_MATRIX,
     GL_COLOR_MATRIX_STACK_DEPTH, GL_COLOR_TABLE,
     GL_CONVOLUTION_1D, GL_CONVOLUTION_2D, GL_HISTOGRAM,
     GL_MAX_COLOR_MATRIX_STACK_DEPTH, GL_MINMAX,
     GL_POST_COLOR_MATRIX_COLOR_TABLE,
     GL_POST_COLOR_MATRIX_RED_BIAS,
     GL_POST_COLOR_MATRIX_GREEN_BIAS,
     GL_POST_COLOR_MATRIX_BLUE_BIAS,
     GL_POST_COLOR_MATRIX_ALPHA_BIAS,
     GL_POST_COLOR_MATRIX_RED_SCALE,
     GL_POST_COLOR_MATRIX_GREEN_SCALE,
     GL_POST_COLOR_MATRIX_BLUE_SCALE,
     GL_POST_COLOR_MATRIX_ALPHA_SCALE,
     GL_POST_CONVOLUTION_COLOR_TABLE,
     GL_POST_CONVOLUTION_RED_BIAS,
     GL_POST_CONVOLUTION_GREEN_BIAS,
     GL_POST_CONVOLUTION_BLUE_BIAS,
     GL_POST_CONVOLUTION_ALPHA_BIAS,
     GL_POST_CONVOLUTION_RED_SCALE,
     GL_POST_CONVOLUTION_GREEN_SCALE,
     GL_POST_CONVOLUTION_BLUE_SCALE,
     GL_POST_CONVOLUTION_ALPHA_SCALE, and GL_SEPARABLE_2D are
     available only if GL_ARB_imaging is returned from glGet when
     called with the argument GL_EXTENSIONS.

     GL_ACTIVE_TEXTURE_ARB, GL_CLIENT_ACTIVE_TEXTURE_ARB, and
     GL_MAX_TEXTURE_UNITS_ARB are available only if
     GL_ARB_multitexture is returned from glGet when called with
     the argument GL_EXTENSIONS.

     When the GL_ARB_multitexture extension is supported, the
     following parameters return the associated value for the
     active texture unit: GL_CURRENT_RASTER_TEXTURE_COORDS,
     GL_TEXTURE_1D, GL_TEXTURE_BINDING_1D, GL_TEXTURE_2D,
     GL_TEXTURE_BINDING_2D, GL_TEXTURE_3D, GL_TEXTURE_BINDING_3D,
     GL_TEXTURE_GEN_S, GL_TEXTURE_GEN_T, GL_TEXTURE_GEN_R,
     GL_TEXTURE_GEN_Q, GL_TEXTURE_MATRIX, and
     GL_TEXTURE_STACK_DEPTH. Likewise, the following parameters
     return the associated value for the active client texture
     unit: GL_TEXTURE_COORD_ARRAY, GL_TEXTURE_COORD_ARRAY_SIZE,
     GL_TEXTURE_COORD_ARRAY_STRIDE, GL_TEXTURE_COORD_ARRAY_TYPE.

ERRORS

     GL_INVALID_ENUM is generated if pname is not an accepted
     value.

     GL_INVALID_OPERATION is generated if glGet is executed
     between the execution of glBegin and the corresponding exe-
     cution of glEnd.

SEE ALSO

     glGetClipPlane(3G), glGetColorTable(3G),

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     glGetColorTableParameter(3G), glGetConvolutionFilter(3G),
     glGetConvolutionParameter(3G), glGetError(3G),
     glGetHistogram(3G), glGetHistogramParameter(3G),
     glGetLight(3G), glGetMap(3G), glGetMaterial(3G),
     glGetMinmax(3G), glGetMinmaxParameter(3G),
     glGetPixelMap(3G), glGetPointerv(3G),
     glGetPolygonStipple(3G), glGetSeparableFilter(3G),
     glGetString(3G), glGetTexEnv(3G), glGetTexGen(3G),
     glGetTexImage(3G), glGetTexLevelParameter(3G),
     glGetTexParameter(3G), glIsEnabled(3G)

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