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/* quantize.h: Quantize a high color bitmap
Copyright (C) 2001, 2002 Martin Weber
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public License
as published by the Free Software Foundation; either version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser 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. */
#include "bitmap.h"
#include "color.h"
#include "exception.h"
#ifndef QUANTIZE_H
#define QUANTIZE_H
#define PRECISION_R 7
#define PRECISION_G 7
#define PRECISION_B 7
#define HIST_R_ELEMS (1<<PRECISION_R)
#define HIST_G_ELEMS (1<<PRECISION_G)
#define HIST_B_ELEMS (1<<PRECISION_B)
#define MR HIST_G_ELEMS*HIST_B_ELEMS
#define MG HIST_B_ELEMS
typedef unsigned long ColorFreq;
typedef ColorFreq *Histogram;
typedef struct {
int desired_number_of_colors; /* Number of colors we will allow */
int actual_number_of_colors; /* Number of colors actually needed */
at_color cmap[256]; /* colormap created by quantization */
ColorFreq freq[256];
Histogram histogram; /* holds the histogram */
} QuantizeObj;
void quantize(at_bitmap *, long ncolors, const at_color * bgColor, QuantizeObj **, at_exception_type * exp);
void quantize_object_free(QuantizeObj * obj);
#endif /* NOT QUANTIZE_H */
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