mirror of https://github.com/GNOME/gimp.git
77 lines
2.6 KiB
C
77 lines
2.6 KiB
C
#ifndef __CPERCEP_H__
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#define __CPERCEP_H__
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/*
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Copyright (C) 1997-2002 Adam D. Moss (the "Author"). All Rights Reserved.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is fur-
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nished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FIT-
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NESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CON-
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NECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of the Author of the
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Software shall not be used in advertising or otherwise to promote the sale,
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use or other dealings in this Software without prior written authorization
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from the Author.
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*/
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/*
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cpercep.c: The CPercep Functions v0.9: 2002-02-10
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Adam D. Moss: adam@gimp.org <http://www.foxbox.org/adam/code/cpercep/>
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TODO: document functions, rename erroneously-named arguments
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*/
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void
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cpercep_init_conversions(void);
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void
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cpercep_rgb_to_space (double inr, double ing, double inb,
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double* outr, double* outg, double* outb);
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void
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cpercep_space_to_rgb (double inr, double ing, double inb,
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double* outr, double* outg, double* outb);
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/* This is in the header so that it can potentially be inlined. */
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static const double
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cpercep_distance_space (const double L1, const double a1, const double b1,
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const double L2, const double a2, const double b2)
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{
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const double Ld = L1 - L2;
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const double ad = a1 - a2;
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const double bd = b1 - b2;
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return (Ld*Ld + ad*ad + bd*bd);
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}
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/* EXPERIMENTAL */
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#if 0
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void
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mix_colours (const double L1, const double a1, const double b1,
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const double L2, const double a2, const double b2,
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double *rtnL, double *rtna, double *rtnb,
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double mass1, double mass2);
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/* util function */
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const double
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xscaler(const double start, const double end,
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const double me, const double him);
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#define MF(L) ((L)<=0.0 ? 0.0 : 1.0)
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#endif /* EXPERIMENTAL */
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#endif /* __CPERCEP_H__ */
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