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GLGETCOLORTABLEPARAM(3G)	 OpenGL Manual	      GLGETCOLORTABLEPARAM(3G)

NAME
       glGetColorTableParameter - get color lookup table parameters

C SPECIFICATION
       void glGetColorTableParameterfv(GLenum target, GLenum pname,
				       GLfloat * params);

       void glGetColorTableParameteriv(GLenum target, GLenum pname,
				       GLint * 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, or
	   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,
       glGetColorTableParameter 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.

       glGetColorTableParameter 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 glColorTable().

       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
       glGetColorTableParameter is present only if ARB_imaging is returned
       when glGetString() 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 glGetColorTableParameter is
       executed between the execution of glBegin() and the corresponding
       execution of glEnd().

SEE ALSO
       glColorTable(), glTexParameter(), glColorTableParameter()

COPYRIGHT
       Copyright © 1991-2006 Silicon Graphics, Inc. This document is licensed
       under the SGI Free Software B License. For details, see
       http://oss.sgi.com/projects/FreeB/.

AUTHORS
       opengl.org

opengl.org			  04/29/2014	      GLGETCOLORTABLEPARAM(3G)

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