gimp_curves_spline (1995-1996)

NAME

gimp_curves_spline - Modifies the intensity curve(s) for specified drawable.

SYNOPSIS

gimp_curves_spline (drawable,channel,num_points,control_pts)

DESCRIPTION

Modifies the intensity mapping for one channel in the specified drawable. The drawable must be either grayscale or RGB, and the channel can be either an intensity component, or the value. The 'control_pts' parameter is an array of integers which define a set of control points which describe a Catmull Rom spline which yields the final intensity curve. Use the 'gimp_curves_explicit' function to explicitly modify intensity levels.

INPUT ARGUMENTS

TYPE	NAME	DESCRIPTION
DRAWABLE	drawable	The drawable
INT32	channel	The channel to modify: { VALUE_LUT (0), RED_LUT (1), GREEN_LUT (2), BLUE_LUT (3), ALPHA_LUT (4) }
INT32	num_points	The number of values in the control point array (3 < num_points <= 32)
INT8ARRAY	control_pts	The spline control points: { cp1.x, cp1.y, cp2.x, cp2.y, ... }

SOME SYNTAX ALTERNATIVES

$drawable->curves_spline (channel,control_pts)

AUTHOR

Spencer Kimball & Peter Mattis
(c)1995-1996 Spencer Kimball & Peter Mattis