--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/imgproc.h	Mon Aug 13 10:25:37 2007 +0200
@@ -0,0 +1,62 @@
+/* Image processing aux functions header file
+   Copyright (C) 1998 Jareth Hein
+
+This file is a part of XEmacs
+
+XEmacs is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 2, or (at your option) any
+later version.
+
+XEmacs 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 General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with XEmacs; see the file COPYING.  If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+/* Synched up with: Not in FSF. */
+
+/* Original author: Jareth Hein */
+
+#define	MAX_CMAP_SIZE	256
+#define	COLOR_DEPTH	8
+#define	MAX_COLOR	256
+
+#define	B_DEPTH		5		/* # bits/pixel to use */
+#define	B_LEN		(1L<<B_DEPTH)
+
+#define	C_DEPTH		2
+#define	C_LEN		(1L<<C_DEPTH)	/* # cells/color to use */
+
+#define	COLOR_SHIFT	(COLOR_DEPTH-B_DEPTH)
+
+typedef	struct colorbox {
+	struct	colorbox *next, *prev;
+	int	rmin, rmax;
+	int	gmin, gmax;
+	int	bmin, bmax;
+	int	total;
+} Colorbox;
+
+typedef struct {
+	int	num_ents;
+	int	entries[MAX_CMAP_SIZE][2];
+} C_cell;
+
+typedef struct {
+  unsigned short rm[MAX_CMAP_SIZE], gm[MAX_CMAP_SIZE], bm[MAX_CMAP_SIZE]; /* map values */
+  int um[MAX_CMAP_SIZE]; /* usage counts for each mapentry */
+  int histogram[B_LEN][B_LEN][B_LEN]; 
+  int num_active_colors;
+  Colorbox *freeboxes; /* used and freed internally */
+  Colorbox *usedboxes; /* used and freed internally */
+  C_cell **ColorCells; /* used and freed internally */
+} quant_table;
+
+#define QUANT_GET_COLOR(qt,r,g,b) (qt->histogram[r>>COLOR_SHIFT][g>>COLOR_SHIFT][b>>COLOR_SHIFT])
+
+quant_table *EImage_build_quantable(unsigned char *eimage, int width, int height, int num_colors);