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−/* Image processing aux functions header file
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−   Copyright (C) 1998 Jareth Hein
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−
+
−This file is a part of XEmacs
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−
+
−XEmacs is free software: you can redistribute it and/or modify it
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−under the terms of the GNU General Public License as published by the
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−Free Software Foundation, either version 3 of the License, or (at your
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−option) any later version.
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−
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−XEmacs is distributed in the hope that it will be useful, but WITHOUT
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−ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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−FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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−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 XEmacs.  If not, see <http://www.gnu.org/licenses/>. */
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−
+
−#ifndef INCLUDED_imgproc_h_
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−#define INCLUDED_imgproc_h_
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−
+
−/* Synched up with: Not in FSF. */
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−
+
−/* Original author: Jareth Hein */
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−
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−#define	MAX_CMAP_SIZE	256
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−#define	COLOR_DEPTH	8
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−#define	MAX_COLOR	256
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−
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−#define	B_DEPTH		5		/* # bits/pixel to use */
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−#define	B_LEN		(1L<<B_DEPTH)
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−
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−#define	C_DEPTH		2
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−#define	C_LEN		(1L<<C_DEPTH)	/* # cells/color to use */
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−
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−#define	COLOR_SHIFT	(COLOR_DEPTH-B_DEPTH)
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−
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−typedef	struct colorbox {
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−	struct	colorbox *next, *prev;
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−	int	rmin, rmax;
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−	int	gmin, gmax;
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−	int	bmin, bmax;
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−	int	total;
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−} Colorbox;
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−
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−typedef struct {
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−	int	num_ents;
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−	int	entries[MAX_CMAP_SIZE][2];
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−} C_cell;
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−
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−typedef struct {
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−  unsigned short rm[MAX_CMAP_SIZE], gm[MAX_CMAP_SIZE], bm[MAX_CMAP_SIZE]; /* map values */
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−  int um[MAX_CMAP_SIZE]; /* usage counts for each mapentry */
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−  int histogram[B_LEN][B_LEN][B_LEN]; 
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−  int num_active_colors;
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−  Colorbox *freeboxes; /* used and freed internally */
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−  Colorbox *usedboxes; /* used and freed internally */
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−  C_cell **ColorCells; /* used and freed internally */
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−} quant_table;
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−
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−#define QUANT_GET_COLOR(qt,r,g,b) (qt->histogram[r>>COLOR_SHIFT][g>>COLOR_SHIFT][b>>COLOR_SHIFT])
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−
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−quant_table *build_EImage_quantable(unsigned char *eimage, int width, int height, int num_colors);
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−
+
−#endif /* INCLUDED_imgproc_h_ */