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-rw-r--r--kfax/faxinput.cpp479
1 files changed, 479 insertions, 0 deletions
diff --git a/kfax/faxinput.cpp b/kfax/faxinput.cpp
new file mode 100644
index 00000000..8ca7fe85
--- /dev/null
+++ b/kfax/faxinput.cpp
@@ -0,0 +1,479 @@
+/* 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;
+}
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-12 14:36:14 +0000