374e55bced
* Makefile.am: add pixmaps/dropper.xpm to EXTRA_DIST * app/appenv.h: minor formatting changes * app/channel.c: #include "gdisplay.h" * app/color_transfer.c * app/dodgeburn.c * app/gdisplay.c * app/iscissors.c * app/paint_core.c: remove extra SQR and ROUND definitions * app/flip_tool.c: hackaround the flip tool options constant problem * app/flip_tool.[ch]: use InternalOrientationType for flip_tool_flip prototype * app/interface.c: use GTK_LABEL case in gtk_label_set_justify * plug-ins/common/mkgen.pl * plug-ins/common/plugin-defs.pl: add @extra EXTRA_DIST processing -Yosh
46 lines
1.5 KiB
C
46 lines
1.5 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 <stdlib.h>
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#include <string.h>
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#include <math.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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double highlights_add[256];
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double midtones_add[256];
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double shadows_add[256];
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/* for darkening */
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double highlights_sub[256];
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double midtones_sub[256];
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double shadows_sub[256];
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/* color transfer functions */
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void
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color_transfer_init ()
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{
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int i;
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for (i = 0; i < 256; i++)
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{
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highlights_add[i] = shadows_sub[255 - i] = (1.075 - 1 / ((double) i / 16.0 + 1));
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midtones_add[i] = midtones_sub[i] = 0.667 * (1 - SQR (((double) i - 127.0) / 127.0));
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shadows_add[i] = highlights_sub[i] = 0.667 * (1 - SQR (((double) i - 127.0) / 127.0));
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}
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}
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