# This file belongs to the CEP package | Ten plik nale/zy do pakietu CEP # This package is public domain | Pakiet stanowi dobro powszechne # For more info see `0CEP_LIC.ENG' | Wi/ecej informacji w ,,0CEP_LIC.POL'' # =========================================================================== # E: "Hex bitmap EPS" --> "filtered EPS" converter # input - input file name # OUTF - output file name # CVM - conversion method # TMPSX - temporary PostScript file name # # P: Konwerter "Hex bitmap EPS" --> "filtered EPS" # wej/scie - nazwa pliku konwertowanego # OUTF - nazwa pliku wyj/sciowego # CVM - metoda konwersji EPS-a # TMPSX - nazwa tymczasowego pliku PostScriptowego BEGIN { ver_no=1.03 gs_abort="2 2 .quit" RS="\015|\012|\015\012" # preparing temporary files | przygotowywanie plik/ow tymczasowych if (TMPSX=="") TMPSX="tmp.psx" if (CVM!~/[LlRrFfNn]/) CVM=CVM "R" # Default coding and compression method if (CVM!~/[Hh8]/) CVM=CVM "8" # Domy/slna metoda kodowania i kompresji printf "CEP ver. " ver_no ", Coding:" if (is_A85()) printf " A85" if (is_HEX()) printf " Hex" if (is_LZW()) printf ", LZW" if (is_RLE()) printf ", RLE" if (is_ZIP()) printf ", Flate (non-standard in PostScript Level 2!)" print "" flag="pre" } # searching for ``strange lines'' is due to the following problem: # a single hex char in line or Postscript command "def" and "add" in prolog # may be misunderstood for a HEX bitmap (see also ``heuristic trick'') # poszukiwanie ,,dziwnych wierszy'' wi/a/ze si/e z nast/epuj/acym problemem: # pojedynczy znak w wierszu oraz instrukcje Postscriptu "def" i "add" # stanowi/ace cz/e/s/c prologu mog/a zosta/c b/l/ednie uznane za # fragment szesnastkowej mapy bitowej (patrz ,,heurystyczny fortel'') {is_hex_line=/^[0-9A-Fa-f]*$/ if (flag=="hex") { if (is_hex_line) {hex_dig_num+=length($0)} else {flag="post"; pos_lines++} } else {is_odd_line=/^(def|add|[0-9A-Fa-f]|)$/ if (flag=="pre") { if (is_hex_line && !is_odd_line) {flag="hex"; hex_dig_num+=length($0)} else {prolog=prolog $0 "\n"; pre_lines++} } else { if (is_hex_line && !is_odd_line) {flag="xhex"; exit} else {pos_lines++} } } } END { if (flag=="pre") errmessage("HEX bitmap not found.", 1) if (flag=="xhex") errmessage("more than one HEX bitmap's found.", 2) # fix (somehow) length of bitmap bufor # ustalanie d/lugo/sci bufora b/ed/acej dzielnikiem d/lugo/sci mapy bitowej if ((hex_dig_num%2)!=0) errmessage("Odd number of HEX digits in the bitmap.", 3) hex_dig_num=hex_dig_num/2 buff_len=8192 while (hex_dig_num%buff_len!=0) buff_len-- buff_num=hex_dig_num/buff_len # modification of the preamble of compressed EPS file # dostosowanie preambu/ly pliku EPS do czytania kompresowanych danych if (match(prolog,/\n%%BoundingBox:[^\n]*\n/)) prolog = substr(prolog,1,RSTART+RLENGTH-1) banner() "\n" uncep_comment() "\n" substr(prolog,RSTART+RLENGTH) else errmessage("\"%%BoundingBox:\" not found.", 4) if (gsub(/currentfile/,"_fltrd_file",prolog)==0) errmessage("illegible EPS preamble.", 5) if (gsub(/readhexstring/,"_read_string",prolog)==0) errmessage("illegible EPS preamble.", 6) if (match(prolog, /\n[^%\n]/)) prolog = substr(prolog,1,RSTART-1) "\n" source() substr(prolog,RSTART) else errmessage("illegible EPS preamble.", 7) # heuristic trick: | heurystyczny fortel: # odd lines at the end of prolog are to be considered as a bitmap beginning # dziwne linie na ko/ncu prologu nale/zy uzna/c za pocz/atek mapy bitowej if (match(prolog,/\n((def|add|[0-9A-Fa-f])\n)+$/)) { prolog = substr(prolog,1,RSTART); print "CEP warning: peculiar bitmap beginning." } gsub(/%/,"%%",prolog) # neutralizing printf | podmiana dla printf # WRITE PostScript ENCODING PROGRAM | TWORZENIE PROGRAMU Postscript-owego out_ps_errorhandler() # out_ps("(" ps_fname(OUTF) ") (w) file /w_file exch def") out_ps("(" ps_fname(FILENAME) ") (r) file /r_file exch def") out_ps("/l_string 255 string def") out_ps("/p_string 4096 string def") out_ps("/b_string " buff_len " string def") out_ps("/flushclose {dup flushfile closefile} def") # copy preamble | przepisywanie preambu/ly out_ps(pre_lines " {r_file l_string readline pop pop} repeat") out_ps(pre_lines+3 " {currentfile l_string readline pop") out_ps("w_file exch writestring w_file (\\n) writestring} repeat") out_ps_block(prolog) out_ps("%--- PROLOG END | KONIEC PROLOGU") # special treatment of the ASCII85 encoded lines looking like DSC comments # dodatkowa obr/obka wierszy (zakodowanych jako ASCII85) zaczynaj/acych # si/e tak jak komentarze DSC if (is_A85()) { out_ps("{pop (%) anchorsearch {pop w_file (%\\n ) writestring} if") out_ps(" {(\\n%) search not {exit} if") out_ps(" w_file exch writestring pop w_file (\\n%\\n ) writestring} loop") out_ps(" w_file exch writestring p_string}") out_ps("/NullEncode filter dup") } else out_ps("w_file") # prepare encoding filters | przygotowywanie filtr/ow koduj/acych if (is_A85()) out_ps("/ASCII85Encode filter") if (is_HEX()) out_ps("/ASCIIHexEncode filter") if (is_LZW()) out_ps("dup /LZWEncode filter") if (is_RLE()) out_ps("dup 0 /RunLengthEncode filter") if (is_ZIP()) out_ps("dup /FlateEncode filter") # loop encoding bitmap | p/etla koduj/aca map/e bitow/a out_ps(buff_num " {r_file b_string readhexstring pop") out_ps("1 index exch writestring} repeat") if (is_A85()) out_ps("flushclose flushclose") if (is_HEX()) out_ps("flushclose") if (is_LZW()) out_ps("flushclose") if (is_RLE()) out_ps("flushclose") if (is_ZIP()) out_ps("flushclose") # copy postamble | przepisanie postambu/ly out_ps(pos_lines+1 " {r_file l_string readline pop") out_ps("w_file exch writestring w_file (\\n) writestring} repeat") out_ps("w_file flushclose r_file closefile quit") printf "." } function banner() {return "%%Creator: CEP ver. " ver_no " by BOP s.c."} function ps_fname(s) {gsub(/\\/,"/",s); return(s)} function out_ps(s) {print s > TMPSX} function out_ps_block(block) {printf block > TMPSX} function out_ps_errorhandler() { out_ps("/errq {" gs_abort "} def") out_ps("errordict begin ") out_ps("/typecheck {255 string cvs (filter) search") out_ps(" {(\\010!Filter failed) print") out_ps(" ( (ASCII85Encode used with GS version<3.0?)\\n\\007) print}") out_ps(" {(\\010!Something went wrong\\n Error: typecheck\\n\\007) print}") out_ps(" ifelse errq} def") out_ps("/ioerror {(\\010!Input/Output error occurred. (Disk full?)\\n\\007)") out_ps(" print errq} def") out_ps("/handleerror {$error begin (Something went wrong) print") out_ps(" (\\n Error: ) print errorname 255 string cvs print") out_ps(" (\\n\\007) print end errq} def") out_ps("end") # out_ps("systemdict /resourcestatus known not") out_ps("{(\\010!This version of Ghostscript doesn't support required Level 2 features\\n\\007)") out_ps(" print quit} if") if (is_A85()) { check_filter("ASCII85Encode", "ASCII85Encode filter") check_filter("NullEncode", "required Level 2 filters") } if (is_HEX()) check_filter("ASCIIHexEncode", "ASCIIHexEncode filter") if (is_LZW()) check_filter("LZWEncode", "LZWEncode filter") if (is_RLE()) check_filter("RunLengthEncode", "RunLengthEncode filter") if (is_ZIP()) check_filter("FlateEncode", "FlateEncode filter") } function check_filter(name, expl) { out_ps("/" name " /Filter resourcestatus {pop pop}") out_ps("{(\\010!This version of Ghostscript doesn't support " expl "\\n\\007)") out_ps(" print errq} ifelse") } function errmessage(errname, errnum) { print "CEP ERROR:", errname "\007"; exit(errnum) } # searching for the most recent, i.e., active, options # poszukiwanie ostatniej (obowi/azuj/acej) opcji function is_A85() {return (CVM~/8[^Hh]*$/) } function is_HEX() {return (CVM~/[Hh][^8]*$/) } function is_LZW() {return (CVM~/[Ll][^NnRrFf]*$/) } function is_RLE() {return (CVM~/[Rr][^NnLlFf]*$/) } function is_ZIP() {return (CVM~/[Ff][^NnLlRr]*$/) } function uncep_comment() { s="%UNCEPInfo: " pre_lines+3 " " buff_num " " buff_len " " pos_lines+1 return s } function source() { s="/_fltrd_file currentfile" if (is_A85()) s=s " /ASCII85Decode filter" if (is_HEX()) s=s " /ASCIIHexDecode filter" if (is_LZW()) s=s " /LZWDecode filter" if (is_RLE()) s=s " /RunLengthDecode filter" if (is_ZIP()) s=s " /FlateDecode filter" s=s " def /_read_string /readstring load def" return s }