C SPECIFICATION

       void GLAPIENTRY glGetHistogramParameterfv( GLenum target,
                                                  GLenum pnam )
       void GLAPIENTRY glGetHistogramParameteriv( GLenum target,
                                                  GLenum pnam )

PARAMETERS

       target  Must be one of GL_HISTOGRAM or GL_PROXY_HISTOGRAM.

       pnam    The name of the parameter to be  retrieved.   Must  be  one  of
               GL_HISTOGRAM_WIDTH, GL_HISTOGRAM_FORMAT, GL_HISTOGRAM_RED_SIZE,
               GL_HISTOGRAM_GREEN_SIZE,                GL_HISTOGRAM_BLUE_SIZE,
               GL_HISTOGRAM_ALPHA_SIZE,     GL_HISTOGRAM_LUMINANCE_SIZE,    or
               GL_HISTOGRAM_SINK.

       _param3 Pointer to storage for the returned values.

DESCRIPTION

       glGetHistogramParameter is used to query parameter values for the  cur-
       rent  histogram or for a proxy.  The histogram state information may be
       queried  by  calling   glGetHistogramParameter   with   a   target   of
       GL_HISTOGRAM (to obtain information for the current histogram table) or
       GL_PROXY_HISTOGRAM (to obtain information from the  most  recent  proxy
       request) and one of the following values for the pnam argument:


           ----------------------------------------------------------------
           Parameter                 Description
           ----------------------------------------------------------------
           GL_HISTOGRAM_WIDTH        Histogram table width
           GL_HISTOGRAM_FORMAT       Internal format
           GL_HISTOGRAM_RED_SIZE     Red component counter size, in bits
           GL_HISTOGRAM_GREEN_SIZE   Green component counter size, in bits
















       GL_HISTOGRAM_SINK             Value of the sink parameter
       ------------------------------------------------------------------------

NOTES

       glGetHistogramParameter  is  present only if GL_ARB_imaging is returned
       when glGetString is called with an argument of GL_EXTENSIONS.

ERRORS

       GL_INVALID_ENUM is generated if target is not one of the allowable val-
       ues.

       GL_INVALID_ENUM  is  generated if pnam is not one of the allowable val-
       ues.

       GL_INVALID_OPERATION is generated if  glGetHistogramParameter  is  exe-
       cuted  between the execution of glBegin and the corresponding execution
       of glEnd.

SEE ALSO

       glGetHistogram, glHistogram



                                                   GLGETHISTOGRAMPARAMETER(3G)