Annotation of ratfiv/epstopdf_perl.txt, revision 1.1
1.1 ! brouard 1: eval '(exit $?0)' && eval 'exec perl -S $0 ${1+"$@"}' && eval 'exec perl -S $0 $argv:q'
! 2: if 0;
! 3: use strict;
! 4:
! 5: # Change by Thomas Esser, Sept. 1998: The above lines allows us to find
! 6: # perl along $PATH rather than guessing a fixed location. The above
! 7: # construction should work with most shells.
! 8:
! 9: # A script to transform an EPS file so that:
! 10: # a) it is guarenteed to start at the 0,0 coordinate
! 11: # b) it sets a page size exactly corresponding to the BoundingBox
! 12: # This means that when Ghostscript renders it, the result needs no
! 13: # cropping, and the PDF MediaBox is correct.
! 14: # c) the result is piped to Ghostscript and a PDF version written
! 15: #
! 16: # It needs a Level 2 PS interpreter.
! 17: # If the bounding box is not right, of course, you have problems...
! 18: #
! 19: # The only thing I have not allowed for is the case of
! 20: # "%%BoundingBox: (atend)", which is more complicated.
! 21: #
! 22: # Sebastian Rahtz, for Elsevier Science
! 23: #
! 24: # now with extra tricks from Hans Hagen's texutil.
! 25: #
! 26: # History
! 27: # 1999/05/06 v2.5 (Heiko Oberdiek)
! 28: # * New options: --hires, --exact, --filter, --help.
! 29: # * Many cosmetics: title, usage, ...
! 30: # * New code for debug, warning, error
! 31: # * Detecting of cygwin perl
! 32: # * Scanning for %%{Hires,Exact,}BoundingBox.
! 33: # * Scanning only the header in order not to get a wrong
! 34: # BoundingBox of an included file.
! 35: # * (atend) supported.
! 36: # * uses strict; (earlier error detecting).
! 37: # * changed first comment from '%!PS' to '%!';
! 38: # * corrected (atend) pattern: '\s*\(atend\)'
! 39: # * using of $bbxpat in all BoundingBox cases,
! 40: # correct the first white space to '...Box:\s*$bb...'
! 41: # * corrected first line (one line instead of two before 'if 0;';
! 42: #
! 43:
! 44: ### program identification
! 45: my $program = "epstopdf";
! 46: my $filedate="1999/05/06";
! 47: my $fileversion="2.5";
! 48: my $copyright = "Copyright 1998,1999 by Sebastian Rahtz et al.";
! 49: my $title = "\U$program\E $fileversion, $filedate - $copyright\n";
! 50:
! 51: ### ghostscript command name
! 52: my $GS = "gs";
! 53: $GS = "gswin32c" if $^O eq 'MSWin32';
! 54: $GS = "gswin32c" if $^O =~ /cygwin/;
! 55:
! 56: ### options
! 57: $::opt_help=0;
! 58: $::opt_debug=0;
! 59: $::opt_compress=1;
! 60: $::opt_gs=1;
! 61: $::opt_hires=0;
! 62: $::opt_exact=0;
! 63: $::opt_filter=0;
! 64: $::opt_outfile="";
! 65:
! 66: ### usage
! 67: my @bool = ("false", "true");
! 68: my $usage = <<"END_OF_USAGE";
! 69: ${title}Syntax: $program [options] <eps file>
! 70: Options:
! 71: --help: print usage
! 72: --outfile=<file>: write result to <file>
! 73: --(no)filter: read standard input (default: $bool[$::opt_filter])
! 74: --(no)gs: run ghostscript (default: $bool[$::opt_gs])
! 75: --(no)compress: use compression (default: $bool[$::opt_compress])
! 76: --(no)hires: scan HiresBoundingBox (default: $bool[$::opt_hires])
! 77: --(no)exact: scan ExactBoundingBox (default: $bool[$::opt_exact])
! 78: --(no)debug: debug informations (default: $bool[$::opt_debug])
! 79: Examples for producing 'test.pdf':
! 80: * $program test.eps
! 81: * produce postscript | $program --filter >test.pdf
! 82: * produce postscript | $program -f -d -o=test.pdf
! 83: Example: look for HiresBoundingBox and produce corrected PostScript:
! 84: * $program -d --nogs -hires test.ps>testcorr.ps
! 85: END_OF_USAGE
! 86:
! 87: ### process options
! 88: use Getopt::Long;
! 89: GetOptions (
! 90: "help!",
! 91: "debug!",
! 92: "filter!",
! 93: "compress!",
! 94: "gs!",
! 95: "hires!",
! 96: "exact!",
! 97: "outfile=s",
! 98: ) or die $usage;
! 99:
! 100: ### help functions
! 101: sub debug {
! 102: print STDERR "* @_\n" if $::opt_debug;
! 103: }
! 104: sub warning {
! 105: print STDERR "==> Warning: @_!\n";
! 106: }
! 107: sub error {
! 108: die "$title!!! Error: @_!\n";
! 109: }
! 110: sub errorUsage {
! 111: die "$usage\n!!! Error: @_!\n";
! 112: }
! 113:
! 114: ### option help
! 115: die $usage if $::opt_help;
! 116:
! 117: ### get input filename
! 118: my $InputFilename = "";
! 119: if ($::opt_filter) {
! 120: @ARGV == 0 or
! 121: die errorUsage "Input file cannot be used with filter option";
! 122: $InputFilename = "-";
! 123: debug "Input file: standard input";
! 124: }
! 125: else {
! 126: @ARGV > 0 or die errorUsage "Input filename missing";
! 127: @ARGV < 2 or die errorUsage "Unknown option or too many input files";
! 128: $InputFilename = $ARGV[0];
! 129: -f $InputFilename or error "'$InputFilename' does not exist";
! 130: debug "Input filename:", $InputFilename;
! 131: }
! 132:
! 133: ### option compress
! 134: my $GSOPTS = "";
! 135: $GSOPTS = "-dUseFlateCompression=false " unless $::opt_compress;
! 136:
! 137: ### option BoundingBox types
! 138: my $BBName = "%%BoundingBox:";
! 139: !($::opt_hires and $::opt_exact) or
! 140: error "Options --hires and --exact cannot be used together";
! 141: $BBName = "%%HiresBoundingBox:" if $::opt_hires;
! 142: $BBName = "%%ExactBoundingBox:" if $::opt_exact;
! 143: debug "BoundingBox comment:", $BBName;
! 144:
! 145: ### option outfile
! 146: my $OutputFilename = $::opt_outfile;
! 147: if ($OutputFilename eq "") {
! 148: if ($::opt_gs) {
! 149: $OutputFilename = $InputFilename;
! 150: if (!$::opt_filter) {
! 151: $OutputFilename =~ s/\.[^\.]*$//;
! 152: $OutputFilename .= ".pdf";
! 153: }
! 154: }
! 155: else {
! 156: $OutputFilename = "-"; # standard output
! 157: }
! 158: }
! 159: if ($::opt_filter) {
! 160: debug "Output file: standard output";
! 161: }
! 162: else {
! 163: debug "Output filename:", $OutputFilename;
! 164: }
! 165:
! 166: ### option gs
! 167: if ($::opt_gs) {
! 168: debug "Ghostscript command:", $GS;
! 169: debug "Compression:", ($::opt_compress) ? "on" : "off";
! 170: }
! 171:
! 172: ### open input file
! 173: open(IN,"<$InputFilename") or error "Cannot open",
! 174: ($::opt_filter) ? "standard input" : "'$InputFilename'";
! 175: binmode IN;
! 176:
! 177: ### open output file
! 178: if ($::opt_gs) {
! 179: my $pipe = "$GS -q -sDEVICE=pdfwrite $GSOPTS " .
! 180: "-sOutputFile=$OutputFilename - -c quit";
! 181: debug "Ghostscript pipe:", $pipe;
! 182: open(OUT,"|$pipe") or error "Cannot open Ghostscript for piped input";
! 183: }
! 184: else {
! 185: open(OUT,">$OutputFilename") or error "Cannot write '$OutputFilename";
! 186: }
! 187:
! 188: ### scan first line
! 189: my $header = 0;
! 190: $_ = <IN>;
! 191: if (/%!/) {
! 192: # throw away binary junk before %!
! 193: s/(.*)%!/%!/o;
! 194: }
! 195: $header = 1 if /^%/;
! 196: debug "Scanning header for BoundingBox";
! 197: print OUT;
! 198:
! 199: ### variables and pattern for BoundingBox search
! 200: my $bbxpatt = '[0-9eE\.\-]';
! 201: # protect backslashes: "\\" gets '\'
! 202: my $BBValues = "\\s*($bbxpatt+)\\s+($bbxpatt+)\\s+($bbxpatt+)\\s+($bbxpatt+)";
! 203: my $BBCorrected = 0;
! 204:
! 205: sub CorrectBoundingBox {
! 206: my ($llx, $lly, $urx, $ury) = @_;
! 207: debug "Old BoundingBox:", $llx, $lly, $urx, $ury;
! 208: my ($width, $height) = ($urx - $llx, $ury - $lly);
! 209: my ($xoffset, $yoffset) = (-$llx, -$lly);
! 210: debug "New BoundingBox: 0 0", $width, $height;
! 211: debug "Offset:", $xoffset, $yoffset;
! 212:
! 213: print OUT "%%BoundingBox: 0 0 $width $height\n";
! 214: print OUT "<< /PageSize [$width $height] >> setpagedevice\n";
! 215: print OUT "gsave $xoffset $yoffset translate\n";
! 216: }
! 217:
! 218: ### scan header
! 219: if ($header) {
! 220: while (<IN>) {
! 221:
! 222: ### end of header
! 223: if (!/^%/ or /^%%EndComments/) {
! 224: print OUT;
! 225: last;
! 226: }
! 227:
! 228: ### BoundingBox with values
! 229: if (/^$BBName$BBValues/) {
! 230: CorrectBoundingBox $1, $2, $3, $4;
! 231: $BBCorrected = 1;
! 232: last;
! 233: }
! 234:
! 235: ### BoundingBox with (atend)
! 236: if (/^$BBName\s*\(atend\)/) {
! 237: debug $BBName, "(atend)";
! 238: if ($::opt_filter) {
! 239: warning "Cannot look for BoundingBox in the trailer",
! 240: "with option --filter";
! 241: last;
! 242: }
! 243: my $pos = tell(IN);
! 244: debug "Current file position:", $pos;
! 245:
! 246: # looking for %%BoundingBox
! 247: while (<IN>) {
! 248: # skip over included documents
! 249: if (/^%%BeginDocument/) {
! 250: while (<IN>) {
! 251: last if /^%%EndDocument/;
! 252: }
! 253: }
! 254: if (/^$BBName$BBValues/) {
! 255: CorrectBoundingBox $1, $2, $3, $4;
! 256: $BBCorrected = 1;
! 257: last;
! 258: }
! 259: }
! 260:
! 261: # go back
! 262: seek(IN, $pos, 0) or error "Cannot go back to line '$BBName (atend)'";
! 263: last;
! 264: }
! 265:
! 266: # print header line
! 267: print OUT;
! 268: }
! 269: }
! 270:
! 271: ### print rest of file
! 272: while (<IN>) {
! 273: print OUT;
! 274: }
! 275:
! 276: ### close files
! 277: close(IN);
! 278: print OUT "grestore\n" if $BBCorrected;
! 279: close(OUT);
! 280: warning "BoundingBox not found" unless $BBCorrected;
! 281: debug "Ready.";
! 282: ;
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