glGetHistogramParameterEXT(3G)				      OpenGL Reference

NAME    [Toc]    [Back]

     glGetHistogramParameterfvEXT, glGetHistogramParameterivEXT	- get
     histogram parameters

C SPECIFICATION    [Toc]    [Back]

     void glGetHistogramParameterfvEXT(	GLenum target,
					GLenum pname,
					GLfloat	*params	)
     void glGetHistogramParameterivEXT(	GLenum target,
					GLenum pname,
					GLint *params )

PARAMETERS    [Toc]    [Back]

     target  Must be one of GL_HISTOGRAM_EXT or	GL_PROXY_HISTOGRAM_EXT.

     pname   The name of the parameter to be retrieved.	 Must be one of
	     GL_HISTOGRAM_WIDTH_EXT, GL_HISTOGRAM_FORMAT_EXT,
	     GL_HISTOGRAM_RED_SIZE_EXT,	GL_HISTOGRAM_GREEN_SIZE_EXT,
	     GL_HISTOGRAM_BLUE_SIZE_EXT, GL_HISTOGRAM_ALPHA_SIZE_EXT,
	     GL_HISTOGRAM_LUMINANCE_SIZE_EXT, or GL_HISTOGRAM_SINK_EXT.

     params  Pointer to	storage	for the	returned values.

DESCRIPTION    [Toc]    [Back]

     glGetHistogramParameterEXT	is used	to query parameter values for the
     current histogram or for a	proxy.	For a detailed description of the
     parameters, see glHistogramEXT.

ERRORS    [Toc]    [Back]

     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 values.

     GL_INVALID_OPERATION is generated if glGetHistogramParameterEXT is
     executed between the execution of glBegin and the corresponding execution
     of	glEnd.

SEE ALSO    [Toc]    [Back]

     glHistogramEXT


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