/usr/include/gwyddion/libprocess/interpolation.h is in libgwyddion20-dev 2.44-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* @(#) $Id: interpolation.h 15598 2013-11-11 12:33:32Z yeti-dn $
* Copyright (C) 2003 David Necas (Yeti), Petr Klapetek.
* E-mail: yeti@gwyddion.net, klapetek@gwyddion.net.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GWY_PROCESS_INTERPOLATION_H__
#define __GWY_PROCESS_INTERPOLATION_H__
#include <glib.h>
#include <libprocess/gwyprocessenums.h>
G_BEGIN_DECLS
gdouble gwy_interpolation_get_dval(gdouble x,
gdouble x1_,
gdouble y1_,
gdouble x2_,
gdouble y2_,
GwyInterpolationType interpolation);
gdouble
gwy_interpolation_get_dval_of_equidists(gdouble x,
gdouble *data,
GwyInterpolationType interpolation);
gdouble
gwy_interpolation_interpolate_1d(gdouble x,
const gdouble *coeff,
GwyInterpolationType interpolation);
gdouble
gwy_interpolation_interpolate_2d(gdouble x,
gdouble y,
gint rowstride,
const gdouble *coeff,
GwyInterpolationType interpolation);
gboolean
gwy_interpolation_has_interpolating_basis(GwyInterpolationType interpolation);
gint
gwy_interpolation_get_support_size(GwyInterpolationType interpolation);
void
gwy_interpolation_resolve_coeffs_1d(gint n,
gdouble *data,
GwyInterpolationType interpolation);
void
gwy_interpolation_resolve_coeffs_2d(gint width,
gint height,
gint rowstride,
gdouble *data,
GwyInterpolationType interpolation);
void
gwy_interpolation_resample_block_1d(gint length,
gdouble *data,
gint newlength,
gdouble *newdata,
GwyInterpolationType interpolation,
gboolean preserve);
void
gwy_interpolation_resample_block_2d(gint width,
gint height,
gint rowstride,
gdouble *data,
gint newwidth,
gint newheight,
gint newrowstride,
gdouble *newdata,
GwyInterpolationType interpolation,
gboolean preserve);
void
gwy_interpolation_shift_block_1d(gint length,
gdouble *data,
gdouble offset,
gdouble *newdata,
GwyInterpolationType interpolation,
GwyExteriorType exterior,
gdouble fill_value,
gboolean preserve);
G_END_DECLS
#endif /* __GWY_PROCESS_INTERPOLATION_H__ */
/* vim: set cin et ts=4 sw=4 cino=>1s,e0,n0,f0,{0,}0,^0,\:1s,=0,g1s,h0,t0,+1s,c3,(0,u0 : */
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