glColorTableParameter(3G)      OpenGL Reference	     glColorTableParameter(3G)

NAME    [Toc]    [Back]

     glColorTableParameterfv, glColorTableParameteriv -	set color lookup table
     parameters

C SPECIFICATION    [Toc]    [Back]

     void glColorTableParameterfv( GLenum target,
				   GLenum pname,
				   const GLfloat *params )
     void glColorTableParameteriv( GLenum target,
				   GLenum pname,
				   const GLint *params )

PARAMETERS    [Toc]    [Back]

     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    [Toc]    [Back]

     glColorTableParameter 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 glColorTable.

NOTES    [Toc]    [Back]

     glColorTableParameter is available	only if	GL_ARB_imaging is returned
     from calling glGetString with an argument of GL_EXTENSIONS.

ERRORS    [Toc]    [Back]

     GL_INVALID_ENUM is	generated if target or pname is	not an acceptable
     value.






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glColorTableParameter(3G)      OpenGL Reference	     glColorTableParameter(3G)



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

ASSOCIATED GETS    [Toc]    [Back]

     glGetColorTableParameter


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

SEE ALSO    [Toc]    [Back]

     glColorTable, glPixelTransfer


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