annotate src/imgproc.h @ 771:943eaba38521

[xemacs-hg @ 2002-03-13 08:51:24 by ben] The big ben-mule-21-5 check-in! Various files were added and deleted. See CHANGES-ben-mule. There are still some test suite failures. No crashes, though. Many of the failures have to do with problems in the test suite itself rather than in the actual code. I'll be addressing these in the next day or so -- none of the test suite failures are at all critical. Meanwhile I'll be trying to address the biggest issues -- i.e. build or run failures, which will almost certainly happen on various platforms. All comments should be sent to ben@xemacs.org -- use a Cc: if necessary when sending to mailing lists. There will be pre- and post- tags, something like pre-ben-mule-21-5-merge-in, and post-ben-mule-21-5-merge-in.
author ben
date Wed, 13 Mar 2002 08:54:06 +0000
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children 2aa9cd456ae7
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1 /* Image processing aux functions header file
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2 Copyright (C) 1998 Jareth Hein
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3
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4 This file is a part of XEmacs
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5
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6 XEmacs is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License as published by the
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8 Free Software Foundation; either version 2, or (at your option) any
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9 later version.
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10
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11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with XEmacs; see the file COPYING. If not, write to
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18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 Boston, MA 02111-1307, USA. */
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20
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21 #ifndef INCLUDED_imgproc_h_
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22 #define INCLUDED_imgproc_h_
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23
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24 /* Synched up with: Not in FSF. */
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25
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26 /* Original author: Jareth Hein */
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27
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28 #define MAX_CMAP_SIZE 256
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29 #define COLOR_DEPTH 8
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30 #define MAX_COLOR 256
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31
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32 #define B_DEPTH 5 /* # bits/pixel to use */
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33 #define B_LEN (1L<<B_DEPTH)
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34
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35 #define C_DEPTH 2
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36 #define C_LEN (1L<<C_DEPTH) /* # cells/color to use */
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37
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38 #define COLOR_SHIFT (COLOR_DEPTH-B_DEPTH)
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39
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40 typedef struct colorbox {
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41 struct colorbox *next, *prev;
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42 int rmin, rmax;
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43 int gmin, gmax;
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44 int bmin, bmax;
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45 int total;
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46 } Colorbox;
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47
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48 typedef struct {
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49 int num_ents;
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50 int entries[MAX_CMAP_SIZE][2];
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51 } C_cell;
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52
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53 typedef struct {
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54 unsigned short rm[MAX_CMAP_SIZE], gm[MAX_CMAP_SIZE], bm[MAX_CMAP_SIZE]; /* map values */
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55 int um[MAX_CMAP_SIZE]; /* usage counts for each mapentry */
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56 int histogram[B_LEN][B_LEN][B_LEN];
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57 int num_active_colors;
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58 Colorbox *freeboxes; /* used and freed internally */
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59 Colorbox *usedboxes; /* used and freed internally */
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60 C_cell **ColorCells; /* used and freed internally */
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61 } quant_table;
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62
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63 #define QUANT_GET_COLOR(qt,r,g,b) (qt->histogram[r>>COLOR_SHIFT][g>>COLOR_SHIFT][b>>COLOR_SHIFT])
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64
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65 quant_table *build_EImage_quantable(unsigned char *eimage, int width, int height, int num_colors);
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66
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67 #endif /* INCLUDED_imgproc_h_ */