glGetHistogramParameter

GLGETHISTOGRAMPARAMETER(3G)			  GLGETHISTOGRAMPARAMETER(3G)



NAME
       glGetHistogramParameterfv,  glGetHistogramParameteriv  - get histogram
       parameters


C SPECIFICATION
       void glGetHistogramParameterfv( GLenum target,
				       GLenum pname,
				       GLfloat *params )
       void glGetHistogramParameteriv( GLenum target,
				       GLenum pname,
				       GLint *params )


PARAMETERS
       target  Must be one of GL_HISTOGRAM or GL_PROXY_HISTOGRAM.

       pname   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.

       params  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 pname argument:


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






















       ------------------------------------------------------------------------
       Parameter		     Description
       ------------------------------------------------------------------------
       GL_HISTOGRAM_BLUE_SIZE	     Blue component counter size, in bits
       GL_HISTOGRAM_ALPHA_SIZE	     Alpha component counter size, in bits
       GL_HISTOGRAM_LUMINANCE_SIZE   Luminance 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
       values.

       GL_INVALID_ENUM is generated if pname 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(3G), glHistogram(3G)



						  GLGETHISTOGRAMPARAMETER(3G)