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root/freemol/trunk/src/mpeg_encode/src/libpnmrw.h
Revision: 23
Committed: Mon Jul 7 23:06:52 2008 UTC (11 years, 10 months ago) by wdelano
File size: 6895 byte(s)
Log Message:
changes for win32
Line User Rev File contents
1 wdelano 22 /* 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     #include <malloc.h>
23 wdelano 23 #if !defined(sco) && !defined(sgi) && !defined(IRIX) && !defined(WIN32)
24 wdelano 22 extern char* malloc();
25     #endif
26     /* End of configurable definitions. */
27    
28    
29     /* Definitions to make PBMPLUS work with either ANSI C or C Classic. */
30    
31     #if __STDC__
32     #define ARGS(alist) alist
33     #else /*__STDC__*/
34     #define ARGS(alist) ()
35     #define const
36     #endif /*__STDC__*/
37    
38    
39     /* Types. */
40    
41     typedef unsigned char bit;
42     #define PBM_WHITE 0
43     #define PBM_BLACK 1
44     #define PBM_FORMAT_TYPE(f) ((f) == PBM_FORMAT || (f) == RPBM_FORMAT ? PBM_TYPE : -1)
45    
46     typedef unsigned char gray;
47     #define PGM_MAXMAXVAL 255
48     #define PGM_FORMAT_TYPE(f) ((f) == PGM_FORMAT || (f) == RPGM_FORMAT ? PGM_TYPE : PBM_FORMAT_TYPE(f))
49    
50     typedef gray pixval;
51     #define PPM_MAXMAXVAL PGM_MAXMAXVAL
52     typedef struct
53     {
54     pixval r, g, b;
55     } pixel;
56     #define PPM_GETR(p) ((p).r)
57     #define PPM_GETG(p) ((p).g)
58     #define PPM_GETB(p) ((p).b)
59     #define PPM_ASSIGN(p,red,grn,blu) do { (p).r = (red); (p).g = (grn); (p).b = (blu); } while ( 0 )
60     #define PPM_EQUAL(p,q) ( (p).r == (q).r && (p).g == (q).g && (p).b == (q).b )
61     #define PPM_FORMAT_TYPE(f) ((f) == PPM_FORMAT || (f) == RPPM_FORMAT ? PPM_TYPE : PGM_FORMAT_TYPE(f))
62    
63     typedef pixel xel;
64     typedef pixval xelval;
65     #define PNM_MAXMAXVAL PPM_MAXMAXVAL
66     #define PNM_GET1(x) PPM_GETB(x)
67     #define PNM_ASSIGN1(x,v) PPM_ASSIGN(x,0,0,v)
68     #define PNM_EQUAL(x,y) PPM_EQUAL(x,y)
69     #define PNM_FORMAT_TYPE(f) PPM_FORMAT_TYPE(f)
70    
71    
72     /* Magic constants. */
73    
74     #define PBM_MAGIC1 'P'
75     #define PBM_MAGIC2 '1'
76     #define RPBM_MAGIC2 '4'
77     #define PBM_FORMAT (PBM_MAGIC1 * 256 + PBM_MAGIC2)
78     #define RPBM_FORMAT (PBM_MAGIC1 * 256 + RPBM_MAGIC2)
79     #define PBM_TYPE PBM_FORMAT
80    
81     #define PGM_MAGIC1 'P'
82     #define PGM_MAGIC2 '2'
83     #define RPGM_MAGIC2 '5'
84     #define PGM_FORMAT (PGM_MAGIC1 * 256 + PGM_MAGIC2)
85     #define RPGM_FORMAT (PGM_MAGIC1 * 256 + RPGM_MAGIC2)
86     #define PGM_TYPE PGM_FORMAT
87    
88     #define PPM_MAGIC1 'P'
89     #define PPM_MAGIC2 '3'
90     #define RPPM_MAGIC2 '6'
91     #define PPM_FORMAT (PPM_MAGIC1 * 256 + PPM_MAGIC2)
92     #define RPPM_FORMAT (PPM_MAGIC1 * 256 + RPPM_MAGIC2)
93     #define PPM_TYPE PPM_FORMAT
94    
95    
96     /* Color scaling macro -- to make writing ppmtowhatever easier. */
97    
98     #define PPM_DEPTH(newp,p,oldmaxval,newmaxval) \
99     PPM_ASSIGN( (newp), \
100     ( (int) PPM_GETR(p) * (newmaxval) + (oldmaxval) / 2 ) / (oldmaxval), \
101     ( (int) PPM_GETG(p) * (newmaxval) + (oldmaxval) / 2 ) / (oldmaxval), \
102     ( (int) PPM_GETB(p) * (newmaxval) + (oldmaxval) / 2 ) / (oldmaxval) )
103    
104    
105     /* Luminance macro. */
106    
107     #define PPM_LUMIN(p) ( 0.299 * PPM_GETR(p) + 0.587 * PPM_GETG(p) + 0.114 * PPM_GETB(p) )
108    
109    
110     /* Declarations of pnmrw routines. */
111    
112     void pnm_init2 ARGS(( char* pn ));
113    
114     char** pm_allocarray ARGS(( int cols, int rows, int size ));
115     #define pnm_allocarray( cols, rows ) ((xel**) pm_allocarray( cols, rows, sizeof(xel) ))
116     char* pm_allocrow ARGS(( int cols, int size ));
117     #define pnm_allocrow( cols ) ((xel*) pm_allocrow( cols, sizeof(xel) ))
118     void pm_freearray ARGS(( char** its, int rows ));
119     #define pnm_freearray( xels, rows ) pm_freearray( (char**) xels, rows )
120     void pm_freerow ARGS(( char* itrow ));
121     #define pnm_freerow( xelrow ) pm_freerow( (char*) xelrow )
122    
123     xel** pnm_readpnm ARGS(( FILE* file, int* colsP, int* rowsP, xelval* maxvalP, int* formatP ));
124     int pnm_readpnminit ARGS(( FILE* file, int* colsP, int* rowsP, xelval* maxvalP, int* formatP ));
125     int pnm_readpnmrow ARGS(( FILE* file, xel* xelrow, int cols, xelval maxval, int format ));
126    
127     int pnm_writepnm ARGS(( FILE* file, xel** xels, int cols, int rows, xelval maxval, int format, int forceplain ));
128     int pnm_writepnminit ARGS(( FILE* file, int cols, int rows, xelval maxval, int format, int forceplain ));
129     int pnm_writepnmrow ARGS(( FILE* file, xel* xelrow, int cols, xelval maxval, int format, int forceplain ));
130    
131     extern xelval pnm_pbmmaxval;
132     /* This is the maxval used when a PNM program reads a PBM file. Normally
133     ** it is 1; however, for some programs, a larger value gives better results
134     */
135    
136    
137     /* File open/close that handles "-" as stdin and checks errors. */
138    
139     FILE* pm_openr ARGS(( char* name ));
140     FILE* pm_openw ARGS(( char* name ));
141     int pm_closer ARGS(( FILE* f ));
142     int pm_closew ARGS(( FILE* f ));
143    
144    
145     /* Colormap stuff. */
146    
147     typedef struct colorhist_item* colorhist_vector;
148     struct colorhist_item
149     {
150     pixel color;
151     int value;
152     };
153    
154     typedef struct colorhist_list_item* colorhist_list;
155     struct colorhist_list_item
156     {
157     struct colorhist_item ch;
158     colorhist_list next;
159     };
160    
161     typedef colorhist_list* colorhash_table;
162    
163     colorhist_vector ppm_computecolorhist ARGS(( pixel** pixels, int cols, int rows, int maxcolors, int* colorsP ));
164     /* Returns a colorhist *colorsP long (with space allocated for maxcolors. */
165    
166     void ppm_addtocolorhist ARGS(( colorhist_vector chv, int* colorsP, int maxcolors, pixel* colorP, int value, int position ));
167    
168     void ppm_freecolorhist ARGS(( colorhist_vector chv ));
169    
170     colorhash_table ppm_computecolorhash ARGS(( pixel** pixels, int cols, int rows, int maxcolors, int* colorsP ));
171    
172     int
173     ppm_lookupcolor ARGS(( colorhash_table cht, pixel* colorP ));
174    
175     colorhist_vector ppm_colorhashtocolorhist ARGS(( colorhash_table cht, int maxcolors ));
176     colorhash_table ppm_colorhisttocolorhash ARGS(( colorhist_vector chv, int colors ));
177    
178     int ppm_addtocolorhash ARGS(( colorhash_table cht, pixel* colorP, int value ));
179     /* Returns -1 on failure. */
180    
181     colorhash_table ppm_alloccolorhash ARGS(( void ));
182    
183     void ppm_freecolorhash ARGS(( colorhash_table cht ));
184    
185     /* Other function declarations */
186     void pnm_promoteformat ARGS(( xel** xels, int cols, int rows, xelval maxval,
187     int format, xelval newmaxval, int newformat ));
188     void pnm_promoteformatrow ARGS(( xel* xelrow, int cols, xelval maxval,
189     int format, xelval newmaxval, int newformat ));
190    
191     xel pnm_backgroundxel ARGS(( xel** xels, int cols, int rows, xelval maxval, int format ));
192     xel pnm_backgroundxelrow ARGS(( xel* xelrow, int cols, xelval maxval, int format ));
193     xel pnm_whitexel ARGS(( xelval maxval, int format ));
194     xel pnm_blackxel ARGS(( xelval maxval, int format ));
195     void pnm_invertxel ARGS(( xel* xP, xelval maxval, int format ));
196    
197     #endif /*_PNMRW_H_*/