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comparison src/imgproc.h @ 265:8efd647ea9ca r20-5b31

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Import from CVS: tag r20-5b31
author cvs
date Mon, 13 Aug 2007 10:25:37 +0200
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children b2472a1930f2
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264:682d2a9d41a5 265:8efd647ea9ca
1 /* Image processing aux functions header file
2 Copyright (C) 1998 Jareth Hein
3
4 This file is a part of XEmacs
5
6 XEmacs is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 2, or (at your option) any
9 later version.
10
11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with XEmacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
20
21 /* Synched up with: Not in FSF. */
22
23 /* Original author: Jareth Hein */
24
25 #define MAX_CMAP_SIZE 256
26 #define COLOR_DEPTH 8
27 #define MAX_COLOR 256
28
29 #define B_DEPTH 5 /* # bits/pixel to use */
30 #define B_LEN (1L<<B_DEPTH)
31
32 #define C_DEPTH 2
33 #define C_LEN (1L<<C_DEPTH) /* # cells/color to use */
34
35 #define COLOR_SHIFT (COLOR_DEPTH-B_DEPTH)
36
37 typedef struct colorbox {
38 struct colorbox *next, *prev;
39 int rmin, rmax;
40 int gmin, gmax;
41 int bmin, bmax;
42 int total;
43 } Colorbox;
44
45 typedef struct {
46 int num_ents;
47 int entries[MAX_CMAP_SIZE][2];
48 } C_cell;
49
50 typedef struct {
51 unsigned short rm[MAX_CMAP_SIZE], gm[MAX_CMAP_SIZE], bm[MAX_CMAP_SIZE]; /* map values */
52 int um[MAX_CMAP_SIZE]; /* usage counts for each mapentry */
53 int histogram[B_LEN][B_LEN][B_LEN];
54 int num_active_colors;
55 Colorbox *freeboxes; /* used and freed internally */
56 Colorbox *usedboxes; /* used and freed internally */
57 C_cell **ColorCells; /* used and freed internally */
58 } quant_table;
59
60 #define QUANT_GET_COLOR(qt,r,g,b) (qt->histogram[r>>COLOR_SHIFT][g>>COLOR_SHIFT][b>>COLOR_SHIFT])
61
62 quant_table *EImage_build_quantable(unsigned char *eimage, int width, int height, int num_colors);