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root/freemol/trunk/src/mpeg_encode/src/libpnmrw.h
Revision: 80
Committed: Tue Dec 30 20:30:57 2008 UTC (12 years, 5 months ago) by wdelano
File size: 6975 byte(s)
Log Message:
preproc
Line File contents
1 /* pnmrw.h - header file for PBM/PGM/PPM read/write library
2 **
3 ** Copyright (C) 1988, 1989, 1991 by Jef Poskanzer.
4 **
5 ** Permission to use, copy, modify, and distribute this software and its
6 ** documentation for any purpose and without fee is hereby granted, provided
7 ** that the above copyright notice appear in all copies and that both that
8 ** copyright notice and this permission notice appear in supporting
9 ** documentation. This software is provided "as is" without express or
10 ** implied warranty.
11 */
12
13 #ifndef _PNMRW_H_
14 #define _PNMRW_H_
15
16 /* CONFIGURE: On some systems, malloc.h doesn't declare these, so we have
17 ** to do it. On other systems, for example HP/UX, it declares them
18 ** incompatibly. And some systems, for example Dynix, don't have a
19 ** malloc.h at all. A sad situation. If you have compilation problems
20 ** that point here, feel free to tweak or remove these declarations.
21 */
22 #if !defined(__APPLE__) && !defined(__GNUC__)
23 #include <malloc.h>
24 #if !defined(sco) && !defined(sgi) && !defined(IRIX) && !defined(WIN32)
25 extern char* malloc();
26 #endif
27 #else
28 #include <stdlib.h>
29 #endif
30
31 /* End of configurable definitions. */
32
33
34 /* Definitions to make PBMPLUS work with either ANSI C or C Classic. */
35
36 #if __STDC__
37 #define ARGS(alist) alist
38 #else /*__STDC__*/
39 #define ARGS(alist) ()
40 #define const
41 #endif /*__STDC__*/
42
43
44 /* Types. */
45
46 typedef unsigned char bit;
47 #define PBM_WHITE 0
48 #define PBM_BLACK 1
49 #define PBM_FORMAT_TYPE(f) ((f) == PBM_FORMAT || (f) == RPBM_FORMAT ? PBM_TYPE : -1)
50
51 typedef unsigned char gray;
52 #define PGM_MAXMAXVAL 255
53 #define PGM_FORMAT_TYPE(f) ((f) == PGM_FORMAT || (f) == RPGM_FORMAT ? PGM_TYPE : PBM_FORMAT_TYPE(f))
54
55 typedef gray pixval;
56 #define PPM_MAXMAXVAL PGM_MAXMAXVAL
57 typedef struct
58 {
59 pixval r, g, b;
60 } pixel;
61 #define PPM_GETR(p) ((p).r)
62 #define PPM_GETG(p) ((p).g)
63 #define PPM_GETB(p) ((p).b)
64 #define PPM_ASSIGN(p,red,grn,blu) do { (p).r = (red); (p).g = (grn); (p).b = (blu); } while ( 0 )
65 #define PPM_EQUAL(p,q) ( (p).r == (q).r && (p).g == (q).g && (p).b == (q).b )
66 #define PPM_FORMAT_TYPE(f) ((f) == PPM_FORMAT || (f) == RPPM_FORMAT ? PPM_TYPE : PGM_FORMAT_TYPE(f))
67
68 typedef pixel xel;
69 typedef pixval xelval;
70 #define PNM_MAXMAXVAL PPM_MAXMAXVAL
71 #define PNM_GET1(x) PPM_GETB(x)
72 #define PNM_ASSIGN1(x,v) PPM_ASSIGN(x,0,0,v)
73 #define PNM_EQUAL(x,y) PPM_EQUAL(x,y)
74 #define PNM_FORMAT_TYPE(f) PPM_FORMAT_TYPE(f)
75
76
77 /* Magic constants. */
78
79 #define PBM_MAGIC1 'P'
80 #define PBM_MAGIC2 '1'
81 #define RPBM_MAGIC2 '4'
82 #define PBM_FORMAT (PBM_MAGIC1 * 256 + PBM_MAGIC2)
83 #define RPBM_FORMAT (PBM_MAGIC1 * 256 + RPBM_MAGIC2)
84 #define PBM_TYPE PBM_FORMAT
85
86 #define PGM_MAGIC1 'P'
87 #define PGM_MAGIC2 '2'
88 #define RPGM_MAGIC2 '5'
89 #define PGM_FORMAT (PGM_MAGIC1 * 256 + PGM_MAGIC2)
90 #define RPGM_FORMAT (PGM_MAGIC1 * 256 + RPGM_MAGIC2)
91 #define PGM_TYPE PGM_FORMAT
92
93 #define PPM_MAGIC1 'P'
94 #define PPM_MAGIC2 '3'
95 #define RPPM_MAGIC2 '6'
96 #define PPM_FORMAT (PPM_MAGIC1 * 256 + PPM_MAGIC2)
97 #define RPPM_FORMAT (PPM_MAGIC1 * 256 + RPPM_MAGIC2)
98 #define PPM_TYPE PPM_FORMAT
99
100
101 /* Color scaling macro -- to make writing ppmtowhatever easier. */
102
103 #define PPM_DEPTH(newp,p,oldmaxval,newmaxval) \
104 PPM_ASSIGN( (newp), \
105 ( (int) PPM_GETR(p) * (newmaxval) + (oldmaxval) / 2 ) / (oldmaxval), \
106 ( (int) PPM_GETG(p) * (newmaxval) + (oldmaxval) / 2 ) / (oldmaxval), \
107 ( (int) PPM_GETB(p) * (newmaxval) + (oldmaxval) / 2 ) / (oldmaxval) )
108
109
110 /* Luminance macro. */
111
112 #define PPM_LUMIN(p) ( 0.299 * PPM_GETR(p) + 0.587 * PPM_GETG(p) + 0.114 * PPM_GETB(p) )
113
114
115 /* Declarations of pnmrw routines. */
116
117 void pnm_init2 ARGS(( char* pn ));
118
119 char** pm_allocarray ARGS(( int cols, int rows, int size ));
120 #define pnm_allocarray( cols, rows ) ((xel**) pm_allocarray( cols, rows, sizeof(xel) ))
121 char* pm_allocrow ARGS(( int cols, int size ));
122 #define pnm_allocrow( cols ) ((xel*) pm_allocrow( cols, sizeof(xel) ))
123 void pm_freearray ARGS(( char** its, int rows ));
124 #define pnm_freearray( xels, rows ) pm_freearray( (char**) xels, rows )
125 void pm_freerow ARGS(( char* itrow ));
126 #define pnm_freerow( xelrow ) pm_freerow( (char*) xelrow )
127
128 xel** pnm_readpnm ARGS(( FILE* file, int* colsP, int* rowsP, xelval* maxvalP, int* formatP ));
129 int pnm_readpnminit ARGS(( FILE* file, int* colsP, int* rowsP, xelval* maxvalP, int* formatP ));
130 int pnm_readpnmrow ARGS(( FILE* file, xel* xelrow, int cols, xelval maxval, int format ));
131
132 int pnm_writepnm ARGS(( FILE* file, xel** xels, int cols, int rows, xelval maxval, int format, int forceplain ));
133 int pnm_writepnminit ARGS(( FILE* file, int cols, int rows, xelval maxval, int format, int forceplain ));
134 int pnm_writepnmrow ARGS(( FILE* file, xel* xelrow, int cols, xelval maxval, int format, int forceplain ));
135
136 extern xelval pnm_pbmmaxval;
137 /* This is the maxval used when a PNM program reads a PBM file. Normally
138 ** it is 1; however, for some programs, a larger value gives better results
139 */
140
141
142 /* File open/close that handles "-" as stdin and checks errors. */
143
144 FILE* pm_openr ARGS(( char* name ));
145 FILE* pm_openw ARGS(( char* name ));
146 int pm_closer ARGS(( FILE* f ));
147 int pm_closew ARGS(( FILE* f ));
148
149
150 /* Colormap stuff. */
151
152 typedef struct colorhist_item* colorhist_vector;
153 struct colorhist_item
154 {
155 pixel color;
156 int value;
157 };
158
159 typedef struct colorhist_list_item* colorhist_list;
160 struct colorhist_list_item
161 {
162 struct colorhist_item ch;
163 colorhist_list next;
164 };
165
166 typedef colorhist_list* colorhash_table;
167
168 colorhist_vector ppm_computecolorhist ARGS(( pixel** pixels, int cols, int rows, int maxcolors, int* colorsP ));
169 /* Returns a colorhist *colorsP long (with space allocated for maxcolors. */
170
171 void ppm_addtocolorhist ARGS(( colorhist_vector chv, int* colorsP, int maxcolors, pixel* colorP, int value, int position ));
172
173 void ppm_freecolorhist ARGS(( colorhist_vector chv ));
174
175 colorhash_table ppm_computecolorhash ARGS(( pixel** pixels, int cols, int rows, int maxcolors, int* colorsP ));
176
177 int
178 ppm_lookupcolor ARGS(( colorhash_table cht, pixel* colorP ));
179
180 colorhist_vector ppm_colorhashtocolorhist ARGS(( colorhash_table cht, int maxcolors ));
181 colorhash_table ppm_colorhisttocolorhash ARGS(( colorhist_vector chv, int colors ));
182
183 int ppm_addtocolorhash ARGS(( colorhash_table cht, pixel* colorP, int value ));
184 /* Returns -1 on failure. */
185
186 colorhash_table ppm_alloccolorhash ARGS(( void ));
187
188 void ppm_freecolorhash ARGS(( colorhash_table cht ));
189
190 /* Other function declarations */
191 void pnm_promoteformat ARGS(( xel** xels, int cols, int rows, xelval maxval,
192 int format, xelval newmaxval, int newformat ));
193 void pnm_promoteformatrow ARGS(( xel* xelrow, int cols, xelval maxval,
194 int format, xelval newmaxval, int newformat ));
195
196 xel pnm_backgroundxel ARGS(( xel** xels, int cols, int rows, xelval maxval, int format ));
197 xel pnm_backgroundxelrow ARGS(( xel* xelrow, int cols, xelval maxval, int format ));
198 xel pnm_whitexel ARGS(( xelval maxval, int format ));
199 xel pnm_blackxel ARGS(( xelval maxval, int format ));
200 void pnm_invertxel ARGS(( xel* xP, xelval maxval, int format ));
201
202 #endif /*_PNMRW_H_*/