fglGetColorTableParameter(3G)

NAME
     fglGetColorTableParameterfv, fglGetColorTableParameteriv - get color
     lookup table parameters


FORTRAN SPECIFICATION
     SUBROUTINE fglGetColorTableParameterfv( INTEGER*4 target,
                                             INTEGER*4 pname,
                                             CHARACTER*8 params )
     SUBROUTINE fglGetColorTableParameteriv( INTEGER*4 target,
                                             INTEGER*4 pname,
                                             CHARACTER*8 params )


PARAMETERS
     target  The target color table.  Must be GL_COLOR_TABLE,
             GL_POST_CONVOLUTION_COLOR_TABLE,
             GL_POST_COLOR_MATRIX_COLOR_TABLE, GL_PROXY_COLOR_TABLE,
             GL_PROXY_POST_CONVOLUTION_COLOR_TABLE,
             GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE.

     pname   The symbolic name of a color lookup table parameter.  Must be one
             of GL_COLOR_TABLE_BIAS, GL_COLOR_TABLE_SCALE,
             GL_COLOR_TABLE_FORMAT, GL_COLOR_TABLE_WIDTH,
             GL_COLOR_TABLE_RED_SIZE, GL_COLOR_TABLE_GREEN_SIZE,
             GL_COLOR_TABLE_BLUE_SIZE, GL_COLOR_TABLE_ALPHA_SIZE,
             GL_COLOR_TABLE_LUMINANCE_SIZE, or GL_COLOR_TABLE_INTENSITY_SIZE.

     params  A pointer to an array where the values of the parameter will be
             stored.

DESCRIPTION
     Returns parameters specific to color table target.

     When pname is set to GL_COLOR_TABLE_SCALE or GL_COLOR_TABLE_BIAS,
     fglGetColorTableParameter returns the color table scale or bias
     parameters for the table specified by target.  For these queries, target
     must be set to GL_COLOR_TABLE, GL_POST_CONVOLUTION_COLOR_TABLE, or
     GL_POST_COLOR_MATRIX_COLOR_TABLE and params points to an array of four
     elements, which receive the scale or bias factors for red, green, blue,
     and alpha, in that order.

     fglGetColorTableParameter can also be used to retrieve the format and
     size parameters for a color table. For these queries, set target to
     either the color table target or the proxy color table target.  The
     format and size parameters are set by fglColorTable.

     The following table lists the format and size parameters that may be
     queried.  For each symbolic constant listed below for pname, params must
     point to an array of the given length, and receive the values indicated.
       ___________________________________________________________________
        Parameter                       N   Meaning
        __________________________________________________________________
        GL_COLOR_TABLE_FORMAT           1   Internal format (e.g. GL_RGBA)
        GL_COLOR_TABLE_WIDTH            1   Number of elements in table
        GL_COLOR_TABLE_RED_SIZE         1   Size of red component, in bits
        GL_COLOR_TABLE_GREEN_SIZE       1   Size of green component
        GL_COLOR_TABLE_BLUE_SIZE        1   Size of blue component
        GL_COLOR_TABLE_ALPHA_SIZE       1   Size of alpha component
        GL_COLOR_TABLE_LUMINANCE_SIZE   1   Size of luminance component
        GL_COLOR_TABLE_INTENSITY_SIZE   1   Size of intensity component
        __________________________________________________________________

NOTES
     fglGetColorTableParameter is present only if GL_ARB_imaging is returned
     when fglGetString is called with an argument of GL_EXTENSIONS.

ERRORS
     GL_INVALID_ENUM is generated if target or pname is not an acceptable
     value.

     GL_INVALID_OPERATION is generated if fglGetColorTableParameter is
     executed between the execution of fglBegin and the corresponding
     execution of fglEnd.


MACHINE DEPENDENCIES
     The SGI_color_table extension is not supported on RealityEngine,
     RealityEngine2, and VTX systems.


SEE ALSO
     fglColorTable, fglTexParameter, fglColorTableParameter