diff options
Diffstat (limited to 'converter/pbm/pbmtopsg3.c')
| -rw-r--r-- | converter/pbm/pbmtopsg3.c | 149 |
1 files changed, 78 insertions, 71 deletions
diff --git a/converter/pbm/pbmtopsg3.c b/converter/pbm/pbmtopsg3.c index 8163b70a..c3bb636d 100644 --- a/converter/pbm/pbmtopsg3.c +++ b/converter/pbm/pbmtopsg3.c @@ -1,20 +1,20 @@ /* pbmtopsg3 Reads a series of PBM images and writes a Postscript program - containing these images as individual pages with Fax-G3 + containing these images as individual pages with Fax-G3 (CCITT-Fiter) compression. (Useful for combining scanned pages into a comfortably printable document.) - Copyright (C) 2001 Kristof Koehler + Copyright (C) 2001 Kristof Koehler <kristof@fachschaft.physik.uni-karlsruhe.de> Netpbm adaptation by Bryan Henderson June 2001. - + This program 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 @@ -55,7 +55,7 @@ parseCommandLine(int argc, char ** argv, OPTENT3(0, "dpi", OPT_FLOAT, &dpiOpt, &dpiSpec, 0); OPTENT3(0, "title", OPT_STRING, &titleOpt, &titleSpec, 0); - + opt.opt_table = option_def; opt.short_allowed = FALSE; opt.allowNegNum = FALSE; @@ -75,67 +75,71 @@ parseCommandLine(int argc, char ** argv, cmdlineP->title = titleSpec ? titleOpt : NULL; } - -static void + +static void write85 ( unsigned int bits, int *col ) { - char buf[5] ; - if ( bits == 0 ) { - fputc ( 'z', stdout ) ; - *col += 1 ; - } else { - buf[4] = bits % 85 + '!' ; - bits /= 85 ; - buf[3] = bits % 85 + '!' ; - bits /= 85 ; - buf[2] = bits % 85 + '!' ; - bits /= 85 ; - buf[1] = bits % 85 + '!' ; - bits /= 85 ; - buf[0] = bits % 85 + '!' ; - fwrite ( buf, 1, 5, stdout ) ; - *col += 5 ; - } - if ( *col > 70 ) { - printf ( "\n" ) ; - *col = 0 ; - } + char buf[5] ; + if ( bits == 0 ) { + fputc ( 'z', stdout ) ; + *col += 1 ; + } else { + buf[4] = bits % 85 + '!' ; + bits /= 85 ; + buf[3] = bits % 85 + '!' ; + bits /= 85 ; + buf[2] = bits % 85 + '!' ; + bits /= 85 ; + buf[1] = bits % 85 + '!' ; + bits /= 85 ; + buf[0] = bits % 85 + '!' ; + fwrite ( buf, 1, 5, stdout ) ; + *col += 5 ; + } + if ( *col > 70 ) { + printf ( "\n" ) ; + *col = 0 ; + } } -static void + +static void writebits ( unsigned int *outbits, int *outbitsidx, int *col, unsigned int bits, int n ) { - int k, m ; - unsigned int usedbits ; - while ( n > 0 ) { - if ( *outbitsidx == 0 ) - *outbits = 0 ; - k = 32 - *outbitsidx ; - m = n > k ? k : n ; - usedbits = (bits >> (n-m)) & ((1<<m)-1) ; - *outbits |= usedbits << (k-m) ; - *outbitsidx += m ; - n -= m ; - if ( *outbitsidx == 32 ) { - write85 ( *outbits, col ) ; - *outbitsidx = 0 ; - } - } + int k, m ; + unsigned int usedbits ; + while ( n > 0 ) { + if ( *outbitsidx == 0 ) + *outbits = 0 ; + k = 32 - *outbitsidx ; + m = n > k ? k : n ; + usedbits = (bits >> (n-m)) & ((1<<m)-1) ; + *outbits |= usedbits << (k-m) ; + *outbitsidx += m ; + n -= m ; + if ( *outbitsidx == 32 ) { + write85 ( *outbits, col ) ; + *outbitsidx = 0 ; + } + } } -static void + +static void flushbits ( unsigned int *outbits, int *outbitsidx, int *col ) { - if ( *outbitsidx > 0 ) { - write85 ( *outbits, col ) ; - *outbitsidx = 0 ; - } + if ( *outbitsidx > 0 ) { + write85 ( *outbits, col ) ; + *outbitsidx = 0 ; + } } + + struct { unsigned int b, l ; } makeup[40][2] = { { { 0x001b, 5 } /* 11011 */ , { 0x000f,10 } /* 0000001111 */ }, { { 0x0012, 5 } /* 10010 */ , { 0x00c8,12 } /* 000011001000 */ }, @@ -243,7 +247,7 @@ struct { unsigned int b, l ; } term[64][2] = { { { 0x004b, 8 } /* 01001011 */ , { 0x002c,12 } /* 000000101100 */ }, { { 0x0032, 8 } /* 00110010 */ , { 0x005a,12 } /* 000001011010 */ }, { { 0x0033, 8 } /* 00110011 */ , { 0x0066,12 } /* 000001100110 */ }, - { { 0x0034, 8 } /* 00110100 */ , { 0x0067,12 } /* 000001100111 */ } + { { 0x0034, 8 } /* 00110100 */ , { 0x0067,12 } /* 000001100111 */ } } ; @@ -251,16 +255,16 @@ static void writelength ( unsigned int *outbits, int *outbitsidx, int *col, int bit, int length ) { - while ( length >= 64 ) { - int m = length / 64 ; - if ( m > 40 ) - m = 40 ; - writebits ( outbits, outbitsidx, col, - makeup[m-1][bit].b, makeup[m-1][bit].l ) ; - length -= 64*m ; - } - writebits ( outbits, outbitsidx, col, - term[length][bit].b, term[length][bit].l ) ; + while ( length >= 64 ) { + int m = length / 64 ; + if ( m > 40 ) + m = 40 ; + writebits ( outbits, outbitsidx, col, + makeup[m-1][bit].b, makeup[m-1][bit].l ) ; + length -= 64*m ; + } + writebits ( outbits, outbitsidx, col, + term[length][bit].b, term[length][bit].l ) ; } @@ -277,9 +281,9 @@ doPage(FILE * const ifP, int outbitsidx, col ; pbm_readpbminit(ifP, &cols, &rows, &format); - + bitrow = pbm_allocrow(cols); - + pm_message("[%u]\n", pageNum); printf ("%%%%Page: %u %u\n", pageNum, pageNum); @@ -288,16 +292,16 @@ doPage(FILE * const ifP, " << /Columns %u /Rows %u /EndOfBlock false >> " "/CCITTFaxDecode filter\n" " image } exec\n", - cols, rows, dpi/72.0, -dpi/72.0, rows, + cols, rows, dpi/72.0, -dpi/72.0, rows, cols, rows) ; - + outbitsidx = col = 0 ; for (row = 0 ; row < rows; ++row) { int lastbit, cnt ; unsigned int j; pbm_readpbmrow(ifP, bitrow, cols, format); - + lastbit = cnt = 0 ; for (j = 0; j < cols; ++j) { if (bitrow[j] != lastbit) { @@ -309,7 +313,7 @@ doPage(FILE * const ifP, } writelength(&outbits, &outbitsidx, &col, lastbit, cnt); } - + flushbits(&outbits, &outbitsidx, &col) ; printf("~>\nshowpage\n") ; @@ -318,7 +322,7 @@ doPage(FILE * const ifP, -static void +static void doPages(FILE * const ifP, unsigned int * const pagesP, double const dpi) { @@ -345,7 +349,7 @@ main(int argc, FILE *ifP; unsigned int pages; - + struct cmdline_info cmdline; pbm_init(&argc, argv); @@ -360,7 +364,7 @@ main(int argc, printf ("%%%%Creator: pbmtopsg3, Copyright (C) 2001 Kristof Koehler\n" "%%%%Pages: (atend)\n" "%%%%EndComments\n") ; - + doPages(ifP, &pages, cmdline.dpi); printf ("%%%%Trailer\n" @@ -370,6 +374,9 @@ main(int argc, pm_close(ifP); pm_close(stdout); - + return 0; } + + + |