libgimpcolor/gimpbilinear.h

   1 /* LIBGIMP - The GIMP Library
   2  * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
   3  *
   4  * This library is free software: you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 3 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library.  If not, see
  16  * <https://www.gnu.org/licenses/>.
  17  */
  18
  19 #if !defined (__GIMP_COLOR_H_INSIDE__) && !defined (GIMP_COLOR_COMPILATION)
  20 #error "Only <libgimpcolor/gimpcolor.h> can be included directly."
  21 #endif
  22
  23 #ifndef __GIMP_BILINEAR_H__
  24 #define __GIMP_BILINEAR_H__
  25
  26 G_BEGIN_DECLS
  27
  28 /* For information look into the C source or the html documentation */
  29
  30
  31 /*  bilinear interpolation functions taken from LibGCK  */
  32
  33
  34 gdouble   gimp_bilinear          (gdouble    x,
  35                                   gdouble    y,
  36                                   gdouble   *values);
  37 guchar    gimp_bilinear_8        (gdouble    x,
  38                                   gdouble    y,
  39                                   guchar    *values);
  40 guint16   gimp_bilinear_16       (gdouble    x,
  41                                   gdouble    y,
  42                                   guint16   *values);
  43 guint32   gimp_bilinear_32       (gdouble    x,
  44                                   gdouble    y,
  45                                   guint32   *values);
  46 GimpRGB   gimp_bilinear_rgb      (gdouble    x,
  47                                   gdouble    y,
  48                                   GimpRGB   *values);
  49 GimpRGB   gimp_bilinear_rgba     (gdouble    x,
  50                                   gdouble    y,
  51                                   GimpRGB   *values);
  52
  53
  54 G_END_DECLS
  55
  56 #endif  /* __GIMP_BILINEAR_H__ */