fglColorTableParameter(3G)

NAME
     fglColorTableParameterfv, fglColorTableParameteriv - set color lookup
     table parameters


FORTRAN SPECIFICATION
     SUBROUTINE fglColorTableParameterfv( INTEGER*4 target,
                                          INTEGER*4 pname,
                                          CHARACTER*8 params )
     SUBROUTINE fglColorTableParameteriv( 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, or
             GL_POST_COLOR_MATRIX_COLOR_TABLE.

     pname   The symbolic name of a texture color lookup table parameter.
             Must be one of GL_COLOR_TABLE_SCALE or GL_COLOR_TABLE_BIAS.

     params  A pointer to an array where the values of the parameters are
             stored.

DESCRIPTION
     fglColorTableParameter is used to specify the scale factors and bias
     terms applied to color components when they are loaded into a color
     table. target indicates which color table the scale and bias terms apply
     to; it must be set to GL_COLOR_TABLE, GL_POST_CONVOLUTION_COLOR_TABLE, or
     GL_POST_COLOR_MATRIX_COLOR_TABLE.

     pname must be GL_COLOR_TABLE_SCALE to set the scale factors.  In this
     case, params points to an array of four values, which are the scale
     factors for red, green, blue, and alpha, in that order.

     pname must be GL_COLOR_TABLE_BIAS to set the bias terms. In this case,
     params points to an array of four values, which are the bias terms for
     red, green, blue, and alpha, in that order.

     The color tables themselves are specified by calling fglColorTable.

NOTES
     fglColorTableParameter is available only if GL_ARB_imaging is returned
     from calling fglGetString 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 fglColorTableParameter is executed
     between the execution of fglBegin and the corresponding execution of
     fglEnd.

ASSOCIATED GETS
     fglGetColorTableParameter


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


SEE ALSO
     fglColorTable, fglPixelTransfer