/* * * postdmd - PostScript translator for DMD bitmap files. * * A simple program that can be used to print DMD bitmaps on PostScript printers. * Much of the code was borrowed from abm, which was written by Guy Riddle. * * Although the program supports two different input bitmap formats, by far the * most important is the Eighth (and Ninth) Edition bitfile format. A bitmap in * the bitfile format begins with a 10 byte header with the first two bytes set to * zero. The next 8 bytes set the x and y coordinates of the bitmap's origin and * corner (ie. the upper left and lower right corners). The compressed raster data * follows the header and consists of control bytes followed an appropriate number * of data bytes. Control bytes (ie. n) less than 127 means read the next 2*n bytes * of raster data directly from the input file, while if n is larger than 128 we * read two bytes from the input file and replicate the bytes n-128 times. After * each scan line is recovered it's exclusive-or'd with the preceeding line to * generate the real raster data. * * After each raster line is recovered postdmd encodes it in a slightly different * format that's designed to be unpacked by a PostScript procedure that's defined * in the prologue. By default no exclusive-or'ing is done and packing of pattern * data can be based on any number of bytes rather than just the next two bytes. * By default 6 byte patterns are used, but any number can be selected with the -b * option. A non-positive argument (eg. -b0) disables all pattern encoding. Larger * patterns increase the size of the output file, but reduce the work load that's * forced on the PostScript interpreter. The default choices I've made (ie. 6 byte * patterns and no exclusive-or'ing) do a decent balancing job across currently * available PostScript printers. Larger patterns (eg. -b16) increase the output * file size, but may be appropriate if you're running at a high baud rate (eg. * 19.2KB), while smaller patter size (eg. -b4) may help if you've got a printer * with a fast processor (eg. a PS-810). * * The encoding produced by the program (and decoded on the printer) looks like, * * bytes patterns count * * where bytes and count are decimal integers and patterns is a hex string. Bytes * is the number of bytes represented by the hex patterns and count is the number * of additional times the patterns should be repeated. For example, * * 2 FFFF 4 * 5 FFFFFFFFFF 1 * 10 FFFFFFFFFFFFFFFFFFFF 0 * * all represent 10 consecutive bytes of ones. Scanlines are terminated by a 0 on * a line by itself. * * The PostScript prologue is copied from *prologue before any of the input files * are translated. The program expects that the following PostScript procedures * are defined in that file: * * setup * * mark ... setup - * * Handles special initialization stuff that depends on how this program * was called. Expects to find a mark followed by key/value pairs on the * stack. The def operator is applied to each pair up to the mark, then * the default state is set up. * * pagesetup * * page pagesetup - * * Does whatever is needed to set things up for the next page. Expects * to find the current page number on the stack. * * bitmap * * v8format flip scanlength scanlines bitmap - * * Prints the bitmap that's read from standard input. The bitmap consists * of scanlines lines, each of which includes scanlength pixels. If * v8format is true the picture is assumed to be an Eighth Edition bitmap, * and the exclusive-or'ing will be done on the printer. * * done * * done * * Makes sure the last page is printed. Only needed when we're printing * more than one page on each sheet of paper. * * Many default values, like the magnification and orientation, are defined in * the prologue, which is where they belong. If they're changed (by options), an * appropriate definition is made after the prologue is added to the output file. * The -P option passes arbitrary PostScript through to the output file. Among * other things it can be used to set (or change) values that can't be accessed by * other options. * */ #include #include #include #ifdef plan9 #define isascii(c) ((unsigned char)(c)<=0177) #endif #include #include #include "comments.h" /* PostScript file structuring comments */ #include "gen.h" /* general purpose definitions */ #include "path.h" /* for the prologue */ #include "ext.h" /* external variable declarations */ char *optnames = "a:b:c:fm:n:o:p:ux:y:A:C:E:J:L:P:DI"; char *prologue = POSTDMD; /* default PostScript prologue */ char *formfile = FORMFILE; /* stuff for multiple pages per sheet */ int bbox[2] = {0, 0}; /* upper right coordinates only */ int formsperpage = 1; /* page images on each piece of paper */ int copies = 1; /* and this many copies of each sheet */ int bytespp = 6; /* bytes per pattern - on output */ int flip = FALSE; /* ones complement the bitmap */ int v8undo = TRUE; /* xor'ing done on host if TRUE */ int v8format = FALSE; /* for Eighth Edition bitmaps */ int page = 0; /* last page we worked on */ int printed = 0; /* and the number of pages printed */ int patterns; /* 16 bit patterns per scan line */ int scanlines; /* lines in the bitmap */ int patcount = 0; /* should be patterns * scanlines */ char *raster = NULL; /* next raster line */ char *prevrast = NULL; /* and the previous one - v8format */ char *rptr; /* next free byte in raster */ char *eptr; /* one past the last byte in raster */ FILE *fp_in = NULL; /* read from this file */ FILE *fp_out = stdout; /* and write stuff here */ FILE *fp_acct = NULL; /* for accounting data */ /*****************************************************************************/ main(agc, agv) int agc; char *agv[]; { /* * * A simple program that translates DMD bitmap files into PostScript. There can * be more than one bitmap per file, but none can be split across input files. * Each bitmap goes on a page by itself. * */ argc = agc; /* other routines may want them */ argv = agv; prog_name = argv[0]; /* really just for error messages */ init_signals(); /* sets up interrupt handling */ header(); /* PostScript header comments */ options(); /* handle the command line options */ setup(); /* for PostScript */ arguments(); /* followed by each input file */ done(); /* print the last page etc. */ account(); /* job accounting data */ exit(x_stat); /* not much could be wrong */ } /* End of main */ /*****************************************************************************/ init_signals() { /* * * Make sure we handle interrupts. * */ if ( signal(SIGINT, interrupt) == SIG_IGN ) { signal(SIGINT, SIG_IGN); signal(SIGQUIT, SIG_IGN); signal(SIGHUP, SIG_IGN); } else { signal(SIGHUP, interrupt); signal(SIGQUIT, interrupt); } /* End else */ signal(SIGTERM, interrupt); } /* End of init_signals */ /*****************************************************************************/ header() { int ch; /* return value from getopt() */ int old_optind = optind; /* for restoring optind - should be 1 */ /* * * Scans the option list looking for things, like the prologue file, that we need * right away but could be changed from the default. Doing things this way is an * attempt to conform to Adobe's latest file structuring conventions. In particular * they now say there should be nothing executed in the prologue, and they have * added two new comments that delimit global initialization calls. Once we know * where things really are we write out the job header, follow it by the prologue, * and then add the ENDPROLOG and BEGINSETUP comments. * */ while ( (ch = getopt(argc, argv, optnames)) != EOF ) if ( ch == 'L' ) prologue = optarg; else if ( ch == '?' ) error(FATAL, ""); optind = old_optind; /* get ready for option scanning */ fprintf(stdout, "%s", CONFORMING); fprintf(stdout, "%s %s\n", VERSION, PROGRAMVERSION); fprintf(stdout, "%s %s\n", DOCUMENTFONTS, ATEND); fprintf(stdout, "%s %s\n", PAGES, ATEND); fprintf(stdout, "%s", ENDCOMMENTS); if ( cat(prologue) == FALSE ) error(FATAL, "can't read %s", prologue); fprintf(stdout, "%s", ENDPROLOG); fprintf(stdout, "%s", BEGINSETUP); fprintf(stdout, "mark\n"); } /* End of header */ /*****************************************************************************/ options() { int ch; /* return value from getopt() */ /* * * Reads and processes the command line options. Added the -P option so arbitrary * PostScript code can be passed through. Expect it could be useful for changing * definitions in the prologue for which options have not been defined. * */ while ( (ch = getopt(argc, argv, optnames)) != EOF ) { switch ( ch ) { case 'a': /* aspect ratio */ fprintf(stdout, "/aspectratio %s def\n", optarg); break; case 'b': /* bytes per pattern */ bytespp = atoi(optarg); break; case 'c': /* copies */ copies = atoi(optarg); fprintf(stdout, "/#copies %s store\n", optarg); break; case 'f': /* ones complement - sort of */ flip = TRUE; break; case 'm': /* magnification */ fprintf(stdout, "/magnification %s def\n", optarg); break; case 'n': /* forms per page */ formsperpage = atoi(optarg); fprintf(stdout, "%s %s\n", FORMSPERPAGE, optarg); fprintf(stdout, "/formsperpage %s def\n", optarg); break; case 'o': /* output page list */ out_list(optarg); break; case 'p': /* landscape or portrait mode */ if ( *optarg == 'l' ) fprintf(stdout, "/landscape true def\n"); else fprintf(stdout, "/landscape false def\n"); break; case 'u': /* don't undo Eighth Edition bitmaps */ v8undo = FALSE; break; case 'x': /* shift things horizontally */ fprintf(stdout, "/xoffset %s def\n", optarg); break; case 'y': /* and vertically on the page */ fprintf(stdout, "/yoffset %s def\n", optarg); break; case 'A': /* force job accounting */ case 'J': if ( (fp_acct = fopen(optarg, "a")) == NULL ) error(FATAL, "can't open accounting file %s", optarg); break; case 'C': /* copy file straight to output */ if ( cat(optarg) == FALSE ) error(FATAL, "can't read %s", optarg); break; case 'E': /* text font encoding - unnecessary */ fontencoding = optarg; break; case 'L': /* PostScript prologue file */ prologue = optarg; break; case 'P': /* PostScript pass through */ fprintf(stdout, "%s\n", optarg); break; case 'R': /* special global or page level request */ saverequest(optarg); break; case 'D': /* debug flag */ debug = ON; break; case 'I': /* ignore FATAL errors */ ignore = ON; break; case '?': /* don't understand the option */ error(FATAL, ""); break; default: /* don't know what to do for ch */ error(FATAL, "missing case for option %c\n", ch); break; } /* End switch */ } /* End while */ argc -= optind; /* get ready for non-option args */ argv += optind; } /* End of options */ /*****************************************************************************/ setup() { /* * * Handles things that must be done after the options are read but before the * input files are processed. * */ writerequest(0, stdout); /* global requests eg. manual feed */ setencoding(fontencoding); /* unnecessary */ fprintf(stdout, "setup\n"); if ( formsperpage > 1 ) { /* followed by stuff for multiple pages */ if ( cat(formfile) == FALSE ) error(FATAL, "can't read %s", formfile); fprintf(stdout, "%d setupforms\n", formsperpage); } /* End if */ fprintf(stdout, "%s", ENDSETUP); } /* End of setup */ /*****************************************************************************/ arguments() { FILE *fp; /* next input file */ /* * * Makes sure all the non-option command line arguments are processed. If we get * here and there aren't any arguments left, or if '-' is one of the input files * we'll process stdin. * */ if ( argc < 1 ) bitmap(stdin); else { /* at least one argument is left */ while ( argc > 0 ) { if ( strcmp(*argv, "-") == 0 ) fp = stdin; else if ( (fp = fopen(*argv, "r")) == NULL ) error(FATAL, "can't open %s", *argv); bitmap(fp); if ( fp != stdin ) fclose(fp); argc--; argv++; } /* End while */ } /* End else */ } /* End of arguments */ /*****************************************************************************/ done() { /* * * Finished with all the input files, so mark the end of the pages with a TRAILER * comment, make sure the last page prints, and add things like the PAGES comment * that can only be determined after all the input files have been read. * */ fprintf(stdout, "%s", TRAILER); fprintf(stdout, "done\n"); fprintf(stdout, "%s 0 0 %d %d\n", BOUNDINGBOX, (bbox[0]*72+100)/100, (bbox[1]*72+100)/100); fprintf(stdout, "%s %d\n", PAGES, printed); } /* End of done */ /*****************************************************************************/ account() { /* * * Writes an accounting record to *fp_acct provided it's not NULL. Accounting is * requested using the -A or -J options. * */ if ( fp_acct != NULL ) fprintf(fp_acct, " print %d\n copies %d\n", printed, copies); } /* End of account */ /*****************************************************************************/ bitmap(fp) FILE *fp; /* next input file */ { int count; /* pattern repeats this many times */ long total; /* expect this many patterns */ /* * * Reads all the bitmaps from the next input file, translates each one into * PostScript, and arranges to have one bitmap printed on each page. Multiple * bitmaps per input file work. * */ fp_in = fp; /* everyone reads from this file */ while ( dimensions() == TRUE ) { patcount = 0; total = scanlines * patterns; bbox[0] = MAX(bbox[0], patterns*16); /* for BoundingBox comment */ bbox[1] = MAX(bbox[1], scanlines); redirect(++page); fprintf(fp_out, "%s %d %d\n", PAGE, page, printed+1); fprintf(fp_out, "/saveobj save def\n"); writerequest(printed+1, fp_out); fprintf(fp_out, "%s ", (v8format == TRUE && v8undo == FALSE) ? "true" : "false"); fprintf(fp_out, "%s ", (flip == TRUE) ? "true" : "false"); fprintf(fp_out, "%d %d bitmap\n", patterns * 16, scanlines); while ( patcount != total && (count = getc(fp)) != EOF ) { addrast(count); patcount += (count & 0177); if ( patcount % patterns == 0 ) putrast(); } /* End while */ if ( debug == ON ) fprintf(stderr, "patterns = %d, scanlines = %d, patcount = %d\n", patterns, scanlines, patcount); if ( total != patcount ) error(FATAL, "bitmap format error"); if ( fp_out == stdout ) printed++; fprintf(fp_out, "showpage\n"); fprintf(fp_out, "saveobj restore\n"); fprintf(fp_out, "%s %d %d\n", ENDPAGE, page, printed); } /* End while */ } /* End of bitmap */ /*****************************************************************************/ dimensions() { int ox, oy; /* coordinates of the origin */ int cx, cy; /* and right corner of the bitmap */ int i; /* loop index */ /* * * Determines the dimensions and type of the next bitmap. Eighth edition bitmaps * have a zero in the first 16 bits. If valid dimensions are read TRUE is returned * to the caller. Changed so the check of whether we're done (by testing scanlines * or patterns) comes before the malloc(). * */ if ( (scanlines = getint()) == 0 ) { ox = getint(); oy = getint(); cx = getint(); cy = getint(); scanlines = cy - oy; patterns = (cx - ox + 15) / 16; v8format = TRUE; } else patterns = getint(); if ( scanlines <= 0 || patterns <= 0 ) /* done - don't do the malloc() */ return(FALSE); if ( raster != NULL ) free(raster); if ( prevrast != NULL ) free(prevrast); if ( (rptr = raster = (char *) malloc(patterns * 2)) == NULL ) error(FATAL, "no memory"); if ( (prevrast = (char *) malloc(patterns * 2)) == NULL ) error(FATAL, "no memory"); for ( i = 0; i < patterns * 2; i++ ) *(prevrast+i) = 0377; eptr = rptr + patterns * 2; return(TRUE); } /* End of dimensions */ /*****************************************************************************/ addrast(count) int count; /* repeat count for next pattern */ { int size; /* number of bytes in next pattern */ int l, h; /* high and low bytes */ int i, j; /* loop indices */ /* * * Reads the input file and adds the appropriate number of bytes to the output * raster line. If count has bit 7 on, one 16 bit pattern is read and repeated * count & 0177 times. If bit 7 is off, count is the number of patterns read from * fp_in - each one repeated once. * */ if ( count & 0200 ) { size = 1; count &= 0177; } else { size = count; count = 1; } /* End else */ for ( i = size; i > 0; i-- ) { if ( (l = getc(fp_in)) == EOF || (h = getc(fp_in)) == EOF ) return; for ( j = count; j > 0; j-- ) { *rptr++ = l; *rptr++ = h; } /* End for */ } /* End for */ } /* End of addrast */ /*****************************************************************************/ putrast() { char *p1, *p2; /* starting and ending patterns */ int n; /* set to bytes per pattern */ int i; /* loop index */ /* * * Takes the scanline that's been saved in *raster, encodes it according to the * value that's been assigned to bytespp, and writes the result to *fp_out. Each * line in the output bitmap is terminated by a 0 on a line by itself. * */ n = (bytespp <= 0) ? 2 * patterns : bytespp; if ( v8format == TRUE && v8undo == TRUE ) for ( i = 0; i < patterns * 2; i++ ) *(raster+i) = (*(prevrast+i) ^= *(raster+i)); for ( p1 = raster, p2 = raster + n; p1 < eptr; p1 = p2 ) if ( patncmp(p1, n) == TRUE ) { while ( patncmp(p2, n) == TRUE ) p2 += n; p2 += n; fprintf(fp_out, "%d ", n); for ( i = 0; i < n; i++, p1++ ) fprintf(fp_out, "%.2X", ((int) *p1) & 0377); fprintf(fp_out, " %d\n", (p2 - p1) / n); } else { while ( p2 < eptr && patncmp(p2, n) == FALSE ) p2 += n; if ( p2 > eptr ) p2 = eptr; fprintf(fp_out, "%d ", p2 - p1); while ( p1 < p2 ) fprintf(fp_out, "%.2X", ((int) *p1++) & 0377); fprintf(fp_out, " 0\n"); } /* End else */ fprintf(fp_out, "0\n"); rptr = raster; } /* End of putrast */ /*****************************************************************************/ patncmp(p1, n) char *p1; /* first patterns starts here */ int n; /* and extends this many bytes */ { char *p2; /* address of the second pattern */ /* * * Compares the two n byte patterns *p1 and *(p1+n). FALSE is returned if they're * different or extend past the end of the current raster line. * */ p2 = p1 + n; for ( ; n > 0; n--, p1++, p2++ ) if ( p2 >= eptr || *p1 != *p2 ) return(FALSE); return(TRUE); } /* End of patncmp */ /*****************************************************************************/ getint() { int h, l; /* high and low bytes */ /* * * Reads the next two bytes from *fp_in and returns the resulting integer. * */ if ( (l = getc(fp_in)) == EOF || (h = getc(fp_in)) == EOF ) return(-1); return((h & 0377) << 8 | (l & 0377)); } /* End of getint */ /*****************************************************************************/ redirect(pg) int pg; /* next page we're printing */ { static FILE *fp_null = NULL; /* if output is turned off */ /* * * If we're not supposed to print page pg, fp_out will be directed to /dev/null, * otherwise output goes to stdout. * */ if ( pg >= 0 && in_olist(pg) == ON ) fp_out = stdout; else if ( (fp_out = fp_null) == NULL ) fp_out = fp_null = fopen("/dev/null", "w"); } /* End of redirect */ /*****************************************************************************/