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2001-01-24 Michael Natterer <mitch@gimp.org> * Makefile.am * configure.in * gimptool.in: added stuff for the new library below. * libgimpmath/.cvsignore * libgimpmath/Makefile.am * libgimpmath/gimpmath.def * libgimpmath/gimpmath.h * libgimpmath/gimpmathtypes.h * libgimpmath/gimpmatrix.c * libgimpmath/gimpmatrix.h * libgimpmath/gimpvector.c * libgimpmath/gimpvector.h * libgimpmath/makefile.mingw.in * libgimpmath/makefile.msc: new shared library. Depends on glib only. * libgimp/Makefile.am * libgimp/gimp.def * libgimp/gimp.h: removed the math stuff. * libgimp/gimpmath.h * libgimp/gimpmatrix.[ch] * libgimp/gimpvector.[ch]: removed. * app/Makefile.am * plug-ins/Lighting/Makefile.am * plug-ins/MapObject/Makefile.am * plug-ins/pagecurl/Makefile.am: link against libgimpmath.la * app/[many files] * libgimpcolor/gimpcolorspace.c * libgimpcolor/gimprgb.c * libgimp/gimpadaptivesupersample.c * libgimp/gimpbilinear.c * libgimp/gimpwidgets.c * modules/colorsel_gtk.c * modules/colorsel_triangle.c * modules/colorsel_water.c * plug-ins/libgck/gck/gckcolor.c * tools/pdbgen/pdb/channel.pdb * tools/pdbgen/pdb/image.pdb: include "libgimpmath/gimpmath.h", removed the remaining includes of the old color stuff.
63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
/* The GIMP -- an image manipulation program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <string.h>
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#include <glib.h>
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#include "libgimpmath/gimpmath.h"
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#include "apptypes.h"
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#include "appenv.h"
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#include "color_transfer.h"
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/* for lightening */
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gdouble highlights_add[256];
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gdouble midtones_add[256];
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gdouble shadows_add[256];
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/* for darkening */
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gdouble highlights_sub[256];
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gdouble midtones_sub[256];
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gdouble shadows_sub[256];
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/* color transfer functions */
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void
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color_transfer_init (void)
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{
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gint i;
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for (i = 0; i < 256; i++)
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{
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highlights_add[i] =
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shadows_sub[255 - i] = (1.075 - 1 / ((gdouble) i / 16.0 + 1));
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midtones_add[i] =
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midtones_sub[i] = 0.667 * (1 - SQR (((gdouble) i - 127.0) / 127.0));
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shadows_add[i] =
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highlights_sub[i] = 0.667 * (1 - SQR (((gdouble) i - 127.0) / 127.0));
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}
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}
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