summaryrefslogtreecommitdiffstats
path: root/kfax/faxinput.cpp
blob: 8ca7fe8588a851850a89b5eeeb4249fb29c8178c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
/* Fax file input processing
   Copyright (C) 1990, 1995  Frank D. Cringle.

This file is part of viewfax - g3/g4 fax processing software.
     
viewfax 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 of the License, or (at your
option) any later version.
     
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <fcntl.h>
#include "faxexpand.h"
#include <qstring.h>
#include <qfile.h>
#include <kapplication.h>
#include <klocale.h>
#include <kdebug.h>

void statusbarupdate(char* name,int width,int height,char* res);
extern void kfaxerror(const QString& title, const QString& error);

#define	FAXMAGIC	"\000PC Research, Inc\000\000\000\000\000\000"

/* Enter an argument in the linked list of pages */
struct pagenode *
notefile(const char *name, int type)
{
    struct pagenode *newnode = (struct pagenode *) xmalloc(sizeof *newnode);

    *newnode = defaultpage;
    if (firstpage == NULL){
	firstpage = newnode;
	auxpage = firstpage;
    }
    newnode->prev = lastpage;
    newnode->next = NULL;
    if (lastpage != NULL)
	lastpage->next = newnode;
    lastpage = newnode;

    // kdDebug() << "Adding new node " << newnode << endl;

    newnode->pathname = (char*) malloc (strlen(name) +1);
    if(!newnode->pathname){
      kfaxerror(i18n("Sorry"),i18n("Out of memory\n"));
      exit(1);
    }

    strcpy(newnode->pathname,name);

    newnode->type = type;


    if ((newnode->name = strrchr(newnode->pathname, '/')) != NULL)
	newnode->name++;
    else
	newnode->name = newnode->pathname;

    if (newnode->width == 0)
	newnode->width = 1728;
    if (newnode->vres < 0)
	newnode->vres = !(newnode->name[0] == 'f' && newnode->name[1] == 'n');
    newnode->extra = NULL;

    return newnode;
}

static t32bits
get4(unsigned char *p, int endian)
{
    return endian ? (p[0]<<24)|(p[1]<<16)|(p[2]<<8)|p[3] :
	p[0]|(p[1]<<8)|(p[2]<<16)|(p[3]<<24);
}

static int
get2(unsigned char *p, int endian)
{
    return endian ? (p[0]<<8)|p[1] : p[0]|(p[1]<<8);
}

/* generate pagenodes for the images in a tiff file */
int
notetiff(const char *name)
{

    FILE *tf;
    unsigned char header[8];
    static const char littleTIFF[5] = "\x49\x49\x2a\x00";
    static const char bigTIFF[5] = "\x4d\x4d\x00\x2a";
    int endian;
    t32bits IFDoff;
    struct pagenode *pn = NULL;
    QString str;


    if ((tf = fopen(name, "r")) == NULL) {
        QString mesg = i18n("Unable to open:\n%1\n").arg(QFile::decodeName(name));
	kfaxerror(i18n("Sorry"), mesg);
	return 0;
    }

    if (fread(header, 8, 1, tf) == 0) {
    nottiff:
	fclose(tf);
	(void) notefile(name,FAX_RAW);
	return 0;
    }
    if (memcmp(header, &littleTIFF, 4) == 0)
	endian = 0;
    else if (memcmp(header, &bigTIFF, 4) == 0)
	endian = 1;
    else
	goto nottiff;
    IFDoff = get4(header+4, endian);
    if (IFDoff & 1)
	goto nottiff;
    do {			/* for each page */
	unsigned char buf[8];
	unsigned char *dir = NULL , *dp = NULL;
	int ndirent;
	pixnum iwidth = defaultpage.width ? defaultpage.width : 1728;
	pixnum iheight = defaultpage.height ? defaultpage.height : 2339;
	int inverse = defaultpage.inverse;
	int lsbfirst = 0;
	int t4opt = 0, comp = 0;
	int orient = defaultpage.orient;
	double yres = defaultpage.vres ? 196.0 : 98.0;
	struct strip *strips = NULL;
	unsigned long rowsperstrip = 0;
	t32bits nstrips = 1;

	if (fseek(tf, IFDoff, SEEK_SET) < 0) {
	realbad:
	  str = i18n("Invalid tiff file:\n%1\n").arg(QFile::decodeName(name));
	  kfaxerror(i18n("Sorry"),str);
	bad:
	    if (strips)
		free(strips);
	    if (dir)
		free(dir);
	    fclose(tf);
	    return 1;
	}
	if (fread(buf, 2, 1, tf) == 0)
	    goto realbad;
	ndirent = get2(buf, endian);
	dir = (unsigned char *) xmalloc(12*ndirent+4);
	if (fread(dir, 12*ndirent+4, 1, tf) == 0)
	    goto realbad;
	for (dp = dir; ndirent; ndirent--, dp += 12) {
	    /* for each directory entry */
	    int tag, ftype;
	    t32bits count, value = 0;
	    tag = get2(dp, endian);
	    ftype = get2(dp+2, endian);
	    count = get4(dp+4, endian);
	    switch(ftype) {	/* value is offset to list if count*size > 4 */
	    case 3:		/* short */
		value = get2(dp+8, endian);
		break;
	    case 4:		/* long */
		value = get4(dp+8, endian);
		break;
	    case 5:		/* offset to rational */
		value = get4(dp+8, endian);
		break;
	    }
	    switch(tag) {
	    case 256:		/* ImageWidth */
		iwidth = value;
		break;
	    case 257:		/* ImageLength */
		iheight = value;
		break;
	    case 259:		/* Compression */
		comp = value;
		break;
	    case 262:		/* PhotometricInterpretation */
		inverse ^= (value == 1);
		break;
	    case 266:		/* FillOrder */
		lsbfirst = (value == 2);
		break;
	    case 273:		/* StripOffsets */
		nstrips = count;
		strips = (struct strip *) xmalloc(count * sizeof *strips);
		if (count == 1 || (count == 2 && ftype == 3)) {
		    strips[0].offset = value;
		    if (count == 2)
			strips[1].offset = get2(dp+10, endian);
		    break;
		}
		if (fseek(tf, value, SEEK_SET) < 0)
		    goto realbad;
		for (count = 0; count < nstrips; count++) {
		    if (fread(buf, (ftype == 3) ? 2 : 4, 1, tf) == 0)
			goto realbad;
		    strips[count].offset = (ftype == 3) ?
			get2(buf, endian) : get4(buf, endian);
		}
		break;
	    case 274:		/* Orientation */
		switch(value) {
		default:	/* row0 at top,    col0 at left   */
		    orient = 0;
		    break;
		case 2:		/* row0 at top,    col0 at right  */
		    orient = TURN_M;
		    break;
		case 3:		/* row0 at bottom, col0 at right  */
		    orient = TURN_U;
		    break;
		case 4:		/* row0 at bottom, col0 at left   */
		    orient = TURN_U|TURN_M;
		    break;
		case 5:		/* row0 at left,   col0 at top    */
		    orient = TURN_M|TURN_L;
		    break;
		case 6:		/* row0 at right,  col0 at top    */
		    orient = TURN_U|TURN_L;
		    break;
		case 7:		/* row0 at right,  col0 at bottom */
		    orient = TURN_U|TURN_M|TURN_L;
		    break;
		case 8:		/* row0 at left,   col0 at bottom */
		    orient = TURN_L;
		    break;
		}
		break;
	    case 278:		/* RowsPerStrip */
		rowsperstrip = value;	
		break;
	    case 279:		/* StripByteCounts */
		if (count != nstrips) {
		  str = i18n("In file %1\nStripsPerImage tag 273=%2,tag279=%3\n")
			      .arg(QFile::decodeName(name)).arg(nstrips).arg(count);
		  kfaxerror(i18n("Message"),str);
		  goto realbad;
		}
		if (count == 1 || (count == 2 && ftype == 3)) {
		    strips[0].size = value;
		    if (count == 2)
			strips[1].size = get2(dp+10, endian);
		    break;
		}
		if (fseek(tf, value, SEEK_SET) < 0)
		    goto realbad;
		for (count = 0; count < nstrips; count++) {
		    if (fread(buf, (ftype == 3) ? 2 : 4, 1, tf) == 0)
			goto realbad;
		    strips[count].size = (ftype == 3) ?
			get2(buf, endian) : get4(buf, endian);
		}
		break;
	    case 283:		/* YResolution */
		if (fseek(tf, value, SEEK_SET) < 0 ||
		    fread(buf, 8, 1, tf) == 0)
		    goto realbad;
		yres = get4(buf, endian) / get4(buf+4, endian);
		break;
	    case 292:		/* T4Options */
		t4opt = value;
		break;
	    case 293:		/* T6Options */
		/* later */
		break;
	    case 296:		/* ResolutionUnit */
		if (value == 3)
		    yres *= 2.54;
		break;
	    }
	}
	IFDoff = get4(dp, endian);
	free(dir);
	dir = NULL;
	if (comp == 5) {
          // compression type 5 is LZW compression
	  kfaxerror(i18n("Sorry"),i18n("Due to patent reasons KFax can not handle LZW (Lempel-Ziv & Welch) "
		    "compressed Fax files.\n"));
	    goto bad;
	}
	if (comp < 2 || comp > 4) {
	  kfaxerror(i18n("Sorry"),i18n("This version can only handle Fax files\n"));
	    goto bad;
	}
	pn = notefile(name,FAX_TIFF);
	pn->nstrips = nstrips;
	pn->rowsperstrip = nstrips > 1 ? rowsperstrip : iheight;
	pn->strips = strips;
	pn->width = iwidth;
	pn->height = iheight;
	pn->inverse = inverse;
	pn->lsbfirst = lsbfirst;
	pn->orient = orient;
	pn->vres = (yres > 150); /* arbitrary threshold for fine resolution */
	if (comp == 2)
	    pn->expander = MHexpand;
	else if (comp == 3)
	    pn->expander = (t4opt & 1) ? g32expand : g31expand;
	else
	    pn->expander = g4expand;
    } while (IFDoff);
    fclose(tf);
    return 1;
}

/* report error and remove bad file from the list */
static void
badfile(struct pagenode *pn)
{
    struct pagenode *p;

    if (errno)
	perror(pn->pathname);
    if (pn == firstpage) {
      if (pn->next == NULL){
	  kfaxerror(i18n("Sorry"),i18n("Bad Fax File"));
	  return;
      }
      else{
	firstpage = thispage = firstpage->next;
	firstpage->prev = NULL;
      }
    }
    else
	for (p = firstpage; p; p = p->next)
	    if (p->next == pn) {
		thispage = p;
		p->next = pn->next;
		if (pn->next)
		    pn->next->prev = p;
		break;
	    }
    if (pn) free(pn);
    pn = NULL;
}

/* rearrange input bits into t16bits lsb-first chunks */
static void
normalize(struct pagenode *pn, int revbits, int swapbytes, size_t length)
{
    t32bits *p = (t32bits *) pn->data;

    switch ((revbits<<1)|swapbytes) {
    case 0:
	break;
    case 1:
	for ( ; length; length -= 4) {
	    t32bits t = *p;
	    *p++ = ((t & 0xff00ff00) >> 8) | ((t & 0x00ff00ff) << 8);
	}
	break;
    case 2:
	for ( ; length; length -= 4) {
	    t32bits t = *p;
	    t = ((t & 0xf0f0f0f0) >> 4) | ((t & 0x0f0f0f0f) << 4);
	    t = ((t & 0xcccccccc) >> 2) | ((t & 0x33333333) << 2);
	    *p++ = ((t & 0xaaaaaaaa) >> 1) | ((t & 0x55555555) << 1);
	}
	break;
    case 3:
	for ( ; length; length -= 4) {
	    t32bits t = *p;
	    t = ((t & 0xff00ff00) >> 8) | ((t & 0x00ff00ff) << 8);
	    t = ((t & 0xf0f0f0f0) >> 4) | ((t & 0x0f0f0f0f) << 4);
	    t = ((t & 0xcccccccc) >> 2) | ((t & 0x33333333) << 2);
	    *p++ = ((t & 0xaaaaaaaa) >> 1) | ((t & 0x55555555) << 1);
	}
    }
}


/* get compressed data into memory */
unsigned char *
getstrip(struct pagenode *pn, int strip)
{
    int fd;
    size_t offset, roundup;
    struct stat sbuf;
    unsigned char *Data;
    union { t16bits s; unsigned char b[2]; } so;
    QString str;

#define ShortOrder	so.b[1]

    so.s = 1;
    if ((fd = open(pn->pathname, O_RDONLY, 0)) < 0) {
	badfile(pn);
	return NULL;
    }

    if (pn->strips == NULL) {
	if (fstat(fd, &sbuf) != 0) {
	    close(fd);
	    badfile(pn);
	    return NULL;
	}
	offset = 0;
	pn->length = sbuf.st_size;
    }
    else if (strip < pn->nstrips) {
	offset = pn->strips[strip].offset;
	pn->length = pn->strips[strip].size;
    }
    else {
      str = i18n("Trying to expand too many strips\n%1%n").arg(QFile::decodeName(pn->pathname));
      kfaxerror(i18n("Warning"),str);
      return NULL;
    }

    /* round size to full boundary plus t32bits */
    roundup = (pn->length + 7) & ~3;

    Data = (unsigned char *) xmalloc(roundup);
    /* clear the last 2 t32bits, to force the expander to terminate
       even if the file ends in the middle of a fax line  */
    *((t32bits *) Data + roundup/4 - 2) = 0;
    *((t32bits *) Data + roundup/4 - 1) = 0;

    /* we expect to get it in one gulp... */
    if (lseek(fd, offset, SEEK_SET) < 0 ||
	(uint) read(fd, Data, pn->length) != pn->length) { 
	badfile(pn);
	free(Data);
	close(fd);
	return NULL;
    }
    close(fd);

    pn->data = (t16bits *) Data;
    if (pn->strips == NULL && memcmp(Data, FAXMAGIC, sizeof(FAXMAGIC)) == 0) {
	/* handle ghostscript / PC Research fax file */
      if (Data[24] != 1 || Data[25] != 0){
	str = i18n("Only the first page of the PC Research multipage file\n%1\nwill be shown\n")
		.arg(QFile::decodeName(pn->pathname));
	kfaxerror(i18n("Message"),str);
      }
	pn->length -= 64;
	pn->vres = Data[29];
	pn->data += 32;
	roundup -= 64;
    }

    normalize(pn, !pn->lsbfirst, ShortOrder, roundup);
    if (pn->height == 0)
	pn->height = G3count(pn, pn->expander == g32expand);
    if (pn->height == 0) {

      str = i18n("No fax found in file:\n%1\n").arg(QFile::decodeName(pn->pathname));
      kfaxerror(i18n("Sorry"),str);
      errno = 0;
      badfile(pn);
      free(Data);
      return NULL;
    }
    if (pn->strips == NULL)
	pn->rowsperstrip = pn->height;
    if (verbose && strip == 0)
	kdWarning() << pn->name << "\n\twidth = " << pn->width << "\n\theight = "
		<< pn->height << "\n\tresolution = " << (pn->vres ? "fine" : "normal") << endl;
//    statusbarupdate(pn->name,pn->width,pn->height,pn->vres ? "fine" : "normal");
    return Data;
}