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libart-lgpl/art_alphagamma.h

58 lines
1.5 KiB

/* Libart_LGPL - library of basic graphic primitives
* Copyright (C) 1998 Raph Levien
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ART_ALPHAGAMMA_H__
#define __ART_ALPHAGAMMA_H__
/* Alphagamma tables */
#ifdef LIBART_COMPILATION
#include "art_config.h"
#include "art_misc.h"
#else
#include <libart_lgpl/art_config.h>
#include <libart_lgpl/art_misc.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
typedef struct _ArtAlphaGamma ArtAlphaGamma;
struct _ArtAlphaGamma {
/*< private >*/
double gamma;
int invtable_size;
int table[256];
art_u8 invtable[1];
};
LIBART_EXPORT ArtAlphaGamma *
art_alphagamma_new (double gamma);
LIBART_EXPORT void
art_alphagamma_free (ArtAlphaGamma *alphagamma);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __ART_SVP_H__ */