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#!/usr/bin/env texlua
kpse.set_program_name('texlua')
-- epspdf conversion utility
-- 0.6.0: first texlua version
-- 0.6.1: allow TeX installation on path with spaces
-- 0.6.2: compatibility fix for luatex 0.81
-- 0.6.3: compatibility fixes for luatex 0.9x
ep_version = '0.6.3'
ep_copyright = '2006, 2008, 2009, 2010, 2011, 2013, 2014, 2015, 2016'
--[[
Note.
TeX code for cropping pdfs adapted from Heiko Oberdiek's pdfcrop utility
Program structure
- early initialization
- functions for:
- error handling
- file- and path utilities
- other general utilities
- infrastructure: logging and temporary files
- reading and writing settings
- gui function
- boundingboxes
- manipulating [e]ps- and pdf files
- the PsPdf object:
- creator functions
- boundingbox handling
- one-step conversion methods
- any_to_any method
- main initialization section:
- collecting system information
- infrastructure: setting up logging and temp directory
- settings:
- defining settings-, descriptions-, options- and auxiliary tables
- read settings
- defining commandline options and help function
- parsing commandline and performing non-conversion options
- calling any_to_any
- finishing up
all calls to external programs work on temporary files with a simple
generated filename. The current directory is a newly-created
temporary directory. So no need to quote names of input- and output
filenames.
POSSIBLE EXTENSIONS
- duplicating epstopdf options
- custom options for gs and pdftops
--]]
-- some general utilities and globals ---------------------------
-- early initializations
eol = false
path_sep = false
if os.type=='unix' then
eol='\n'
path_sep = ':'
else
eol='\r\n'
path_sep = ';'
end
bufsize=16000 -- for reading and writing files
-- these `declarations' are not really needed;
-- they are here mainly for my own peace of mind
from_gui = false -- whether epspdf is run from the epspsdtk gui
cwd = ''
-- Windows: miktex, TL or neither.
-- Actual values determined during system-dependent initialization
is_miktex = false
is_tl_w32 = false
-- recent versions of miktex include pdftops
auto_psp = true -- configuration of pdftops_prog not needed or not allowed
-- some global file- and directory names
gs_prog = false
pdftops = false
epsdir = false
rcfile = false
logfile = false
tempdir = false
tempfiles = {}
-- childpath = false
-- os.getenv('path') returns the parents path,
-- so we need to keep track ourselves of the child path
options = false -- actual conversion options
settings = false -- persistent settings; may be stored in config file
descriptions = false -- help strings for settings
gs_options = false
pdf_options = false
pdf_tail_options = false
ps_options = false
gray_options = false
-- logging ------------------------
-- we open and close the logfile anew for each write.
-- failure to open constitutes no error.
function print_log(s)
local f = io.open(logfile, 'a')
if f then
f:write(s,eol)
f:close()
end
if from_gui then
print(s) -- intercepted by the gui
end
end
function write_log(s)
print_log(string.format('%s %s',
os.date('%Y/%m/%d %H:%M:%S', os.time()), s))
end
function log_cmd(cmd)
write_log('[' .. table.concat(cmd, '] [') .. ']')
end
-- error- and debug -------------------------
-- Simple-minded error handling. At most, we call a function which
-- tries to write the error message to log before re-raising the error.
-- When run from the Tcl/Tk gui, this gui will capture error messages.
function errror(mess)
if logfile then pcall(write_log, mess) end
-- ignore result of pcall: we can do nothing about failure
error(mess, 2)
end
function warn(mess)
if logfile then write_log(mess) end
print(mess)
end
function dbg(mess)
if options.debug then
warn(mess)
end
end
--[[
function dbg_opt()
if options.debug then
local mess = ''
for _, k in ipairs({'bbox', 'gray', 'page'}) do
mess = mess.. ' ' .. k .. ': ' .. tostring(options.k)
end
dbg(mess)
end
end
--]]
-- file- and path utilities ----------------
function ep_shortname(path)
if os.type=='unix' then
return path
else
-- shortname appears not to work under miktex
-- so return original path as a fallback
local sp = lfs.shortname(path)
return sp or path
end
end
-- prepend or append dir to path if necessary
function maybe_add_path(dir, append)
local dircmp = path_sep .. dir .. path_sep
local pathcmp = path_sep .. kpse.var_value('PATH') .. path_sep
-- case folding
if os.name=='windows' or os.name=='cygwin' or os.name=='macosx' then
dircmp = string.lower(dir)
pathcmp = string.lower(pathcmp)
end
-- slash flipping
if os.type=='windows' then
pathcmp = (string.gsub(pathcmp, '/', '\\'))
dircmp = (string.gsub(dircmp, '/', '\\'))
end
if not string.find(pathcmp, dircmp, 1, true) then
if not append then -- prepend
os.setenv('PATH', dir..path_sep..kpse.var_value('PATH'))
else -- append
os.setenv('PATH', kpse.var_value('PATH')..path_sep..dir)
end
end
end
function fw(path)
if os.type=='windows' then
return string.gsub(path, '\\', '/')
else
return path
end
end
function absolute_path(path)
--[[ Return absolute normalized version of path, interpreted
from the directory from where the program was called.
We use the fact that lfs.currentdir() always returns an absolute and
normalized path. So we go to the parent directory of path, ask for
the current directory and then combine the current directory with
the base filename.
On windows, texlua has no trouble cd-ing into a UNC path.
The function returns nil if there is no valid parent path.
This might be an issue if path is a directory,
but we shall apply this function only on files.
It is ok if path itself does not exist. --]]
path = fw(path)
local present_dir = fw(lfs.currentdir())
lfs.chdir(cwd)
local parentdir
local filename
if string.match(path, '/') then
parentdir, filename = string.match(path,'^(.*)/([^/]*)$')
if parentdir=='' then
parentdir = '/'
-- on unix, this is an absolute path. on windows, it is not
if os.type=='windows' then
lfs.chdir('/')
parentdir = fw(lfs.currentdir())
end
elseif os.type=='windows' and string.match(parentdir,'^[a-zA-Z]:$') then
parentdir = string.sub(parentdir,1,2)..'/'
else
if not lfs.chdir(parentdir) then
parentdir = nil
else
parentdir = fw(lfs.currentdir())
end
end
elseif os.type=='windows' and string.match(path,'^[a-zA-Z]:') then
-- windows: d:file
parentdir = string.sub(path,1,2)
if not lfs.chdir(parentdir) then
parentdir = nil
else
parentdir = fw(lfs.currentdir())
filename = string.sub(path,3)
end
else
parentdir = fw(lfs.currentdir())
filename = path
end
lfs.chdir(present_dir)
if not parentdir then
return nil
elseif string.sub(parentdir,-1)=='/' then
return parentdir..filename, parentdir
else
return parentdir..'/'..filename, parentdir
end
end -- absolute_path
-- check whether prog is on the searchpath.
-- we need it only under unix,
-- so we save ourselves the trouble of accommodating windows.
-- we return the original string, although we only need a yes or no answer
function find_on_path (prog)
if os.type ~= 'unix' then
errror('find_on_path: this is a unix-only function')
end
for d in string.gmatch(os.getenv('PATH'), '[^:]+') do
if lfs.isfile(d..'/'..prog) then
return prog
end
end
return false
end -- find_on_path
-- On Windows, we do not count so much on the existing searchpath
-- so is_prog tests whether the file exists and is an exe file.
function is_prog (path)
-- 1. test for and if necessary add extension
-- 2. test for existence
-- 3. returns either false or absolute path
if os.type ~= 'windows' then
errror('is_prog: this is a Windows-only function')
end
if not path then
return false
end
if not string.lower(string.sub(path,-4,-1))=='.exe' then
path = path..'.exe'
end
path = absolute_path(path)
if not (path and lfs.isfile(path)) then
return false
else
return path
end
end -- is_prog
function dir_writable(d)
-- because directory attributes do not tell the whole story,
-- we actually try to create a file in the directory.
if not lfs.isdir(d) then
return false
end
-- try to create a new file, write to it and delete it afterwards
for i=1,1000 do
local s = d .. '/' .. tostring(i)
if not lfs.isfile(s) then
local fh = io.open(s, "w")
if fh then
fh:write('test')
fh:close()
if lfs.isfile(s) then
if lfs.attributes(s, 'size') > 0 then
os.remove(s)
return true
else
os.remove(s)
return false -- open and write resulted in empty file
end -- lfs.attributes
else
return false -- open and write did not result in a file
end -- lfs.isfile
end -- fh
return false -- filename available; could not open for write
end -- not lfs.isfile
end -- for
return false
end
function system_tempdir ()
local d
if os.type=='windows' then
d = os.getenv('TEMP')
if not d then
d = os.getenv('TMP')
end
else
d = os.getenv('TMPDIR')
if not d then
d = '/tmp'
end
end
-- if d then dbg('system tempdir: '..d) end
-- cygwin: $TEMP=/tmp, root '/' being root of cygwin installation
if d and not dir_writable(d) then
dbg('unfortunately, '..d..' not writable')
d = false
end
return d
end
-- other general utilities ---------------------------
-- check whether el occurs in array lst
function in_list (el, lst)
if not lst then return false end
for _,p in ipairs(lst) do
if el == p then
return true
end
end
return false
end -- in_list
-- remove leading and trailing, but not embedded spaces
function strip_outer_spaces(s)
s = string.gsub(s, '%s*$', '')
s = string.gsub(s, '^%s*', '')
return s
end -- strip_outer_spaces
function join(t, sep, lastsep)
-- there is a table function concat which does this,
-- but without optional different lastsep
if t==nil or #t<1 then return '' end -- or should we return nil?
local s = t[1]
for i=2,#t do -- ok if #t<2
if i==#t and lastsep then
s = s .. lastsep .. t[i]
else
s = s .. sep .. t[i]
end
end
return s
end -- join
-- combine several tables into one.
-- the parameter is a table of tables.
function tab_combine (t)
local res = {}
for _,tt in ipairs(t) do
for __, ttt in ipairs(tt) do
table.insert(res, ttt)
end
end
return res
end -- tab_combine
-- Copy a file in chunks, with optional length and offset.
-- Since files may be very large, we copy them piecemeal.
-- An initial chunk of size bufsize should be plenty to include
-- any interesting header information.
function slice_file(source, dest, len, offset, mode)
-- The final three parameters can be independently left out by
-- specifying false as value
-- Assume caller ensured parameters of correct type.
-- We do not allow negative offsets.
local sz = lfs.attributes(source, 'size')
if not offset then
offset = 0
elseif offset>sz then
offset = sz
end
if not len or len>sz-offset then
len = sz - offset
end
if not mode then mode = 'wb' end
-- dbg('copying '..len..' bytes of '..source..' to '..dest..' from '..offset
-- ..' in '..mode..' mode')
local buffer=''
local s=io.open(source, 'rb')
s:seek('set', offset)
local copied = 0
local d=io.open(dest, mode)
if not d then errror('slice_file: failed to copy to '..dest) end
local slen = len
while slen>0 do
if slen>=bufsize then
buffer = s:read(bufsize)
slen = slen - bufsize
else
buffer = s:read(slen)
slen = 0
end
if not d:write(buffer) then
errror('slice_file: failed to copy to '..dest)
end
end
s:close()
d:close()
end -- slice_file
function move_or_copy(source, dest)
if lfs.isfile(dest) and lfs.attributes(dest, 'size')>0 then
warn('Removing old '..dest)
os.remove(dest) -- in case of failure, go ahead anyway
end
if not os.rename(source, dest) then
slice_file(source, dest) -- bails out on failure
local ok, err_mess = os.remove(source)
if not ok then
warn('Failed to remove old ' .. source .. ': ' .. err_mess)
end
end
end
-- temporary files ----------------------------------------
-- tempdir = false -- will be created later and chdir-ed into
-- tempfiles initialized early to empty table
-- We just name our temporary files nn.<ext> with successive nn.
-- We cannot exclude that another process uses our tempdir
-- so we have to first check for each new file whether it already exists.
-- Epspdf does all the real work from the temp directory.
function mktemp(ext)
local froot, fname, f, g
for i=0,99 do
froot = string.format('%02d.', i)
fname = froot..ext
-- dbg('New temp file '..fname..'?')
if ext~='tex' then
if not lfs.isfile(fname) then
-- dbg(fname..' available')
f = io.open(fname, 'wb')
if not f then
errror('Cannot create temporary file '..fname)
end
f:close()
table.insert(tempfiles, fname)
return froot..ext -- no need to record pdf name
end
else
-- tex; we also need a pdf
if not lfs.isfile(fname) and not lfs.isfile(froot..'pdf') then
local f = io.open(fname, 'wb')
if not f then
errror('Cannot create temporary file '..fname)
end
f:close()
table.insert(tempfiles, fname)
fname = froot..'pdf'
g = io.open(fname, 'wb')
if not g then
errror('Cannot create temporary file '..fname)
end
g:close()
table.insert(tempfiles, fname)
table.insert(tempfiles, froot..'log')
return froot..ext -- no need to record pdf name
end
end -- if
end -- for
errror('Cannot create temporary file in '..tempdir)
end
function waitasec()
-- stupid windows file locking
if os.type=='windows' and (tonumber(os.uname().version) or 0)>=6 then
os.execute('timeout /t 1 /nobreak >nul')
elseif os.type=='windows' then
os.execute('ping -n 1 localhost >NUL')
-- else do nothing
end
-- error checking pointless
end
function cleantemp()
lfs.chdir(tempdir)
if os.type=='windows' then waitasec() end
for _,f in ipairs(tempfiles) do
if lfs.isfile(f) then
local success, mess = os.remove(f)
if not success then write_log(mess) end
end
end
local empty = true
for f in lfs.dir('.') do
if f ~= '.' and f ~= '..' then
empty = false
write_log('Temp dir '..tempdir..' contains '..f..' therefore not removed')
break
end
end
if os.type=='windows' then waitasec() end
lfs.chdir('..')
if empty then
local res, mess
res, mess = lfs.rmdir(tempdir)
if not res then
write_log('Failed to remove empty '..tempdir..'\n'..mess)
end
end
end
-- epsdevice -----------------------
function epsdevice()
local gh = io.popen(gs_prog..' -help')
local s = gh:read("*a")
gh:close()
if string.find(s,'eps2write') then
return 'eps2write'
elseif string.find(s,'epswrite') then
return 'epswrite'
else
return false
end
end
-- settings -----------------------
function write_settings (file)
local f
if file then
f = io.open(file, 'wb')
if not f then
return
end
else -- stdout to be captured by epspdftk
f = io.output()
if os.type=='windows' and not auto_psp then
f:write('psp_config = yes', eol)
end
end
for k, v in pairs(settings) do
if k ~= 'pdftops_prog' or os.type=='windows' then
if descriptions[k] and file then
f:write(eol, '# ', descriptions[k], eol)
end
f:write(k, ' = ', tostring(v), eol)
end
end
if file then
f:close()
end
end
function read_settings(file)
-- read and interpret rcfile
-- we shall ignore illegal entries.
local contents
local f
if file then
f = io.open(rcfile, 'rb')
if not f then
return
end
else
f = io.input()
end
contents = f:read(10000)
if file then
f:close()
end
if not contents or contents=='' then
dbg('No settings read')
return
-- else
-- dbg(contents)
end
-- remove initial \r and \n characters
contents = string.gsub(contents, '^[\r\n]*', '');
-- gmatch chops contents into series of non-line-ending characters
-- possibly followed by line-ending characters.
local k, v, vl, vnum
for l in string.gmatch(contents, '[^\r\n]+[\r\n]*') do
l = string.match(l,'[^\r\n]*')
if not string.match(l, '^#') then
k, v = string.match(l, '^%s*([^%s]+)%s*=%s*(.*)$')
if v then v = string.gsub(v,'%s*$', '') end
-- now handle k and v
if k == 'pdf_target' then
-- ignore unless valid option
if in_list(v, pdf_targets) then
settings[k] = v
end
elseif k == 'pdf_version' then
-- ignore unless valid option
if in_list(v, pdf_versions) then
settings[k] = v
end
--[[
elseif k == 'ignore_hires_bb' then
vl = string.lower(string.sub(v,1,1))
if v == 0 or vl == 'n' or vl == 'f' then
settings.use_hires_bb = true
elseif v == 1 or vl == 'y' or vl == 't' then
settings.use_hires_bb = false
end
elseif k == 'use_hires_bb' then
vl = string.lower(string.sub(v,1,1))
if v == 0 or vl == 'n' or vl == 'f' then
settings.use_hires_bb = false
elseif v == 1 or vl == 'y' or vl == 't' then
settings.use_hires_bb = true
end
elseif k == 'bb_spread' then
vnum = tonumber(v)
if vnum and vnum >= 0 then
settings[k] = math.modf(v) -- truncate to integer
end
--]]
elseif k == 'pdftops_prog' then
if is_miktex then
settings.pdftops_prog = is_prog(v)
end -- else ignore
elseif k == 'ignore_pdftops' then
vl = string.lower(string.sub(v,1,1))
if v == 0 or vl == 'n' or vl == 'f' then
settings.use_pdftops = true
elseif v == 1 or vl == 'y' or vl == 't' then
settings.use_pdftops = false
end
elseif k == 'use_pdftops' then
vl = string.lower(string.sub(v,1,1))
if v == '0' or vl == 'n' or vl == 'f' then
settings.use_pdftops = false
elseif v == '1' or vl == 'y' or vl == 't' then
settings.use_pdftops = true
end
-- final three settings not used by epspdf itself but
-- passed along to epspdftk
elseif k == 'ps_viewer' then
settings.ps_viewer = v
elseif k == 'pdf_viewer' then
settings.pdf_viewer = v
elseif k == 'default_dir' then
settings.default_dir = v
elseif k == 'default_dir' then
settings.default_dir = v
end -- test for k
end -- not matching ^#
end -- for
end -- read settings
-- gui: reading and writing settings -----------
function gui(action)
-- use stdin for reading settings from gui, and stdout for writing
if action=='config_w' then
-- called at start of epspdftk
write_settings() -- to pipe epspdf => epspdftk
os.exit()
elseif action=='config_r' then
read_settings() -- from 'pipe' epspdftk => epspdf
write_settings(rcfile)
os.exit()
else
from_gui = true
end
end
-- boundingboxes ---------------------------------------------------
-- [HR]Bb.coords names now same as those of epdf PDFRectangle
Bb = {}
Bb.coords = {'x1', 'y1', 'x2', 'y2'}
function Bb:from_rect(r)
for _,k in ipairs(self.coords) do
if not r[k] or type(r[k])~='number' then
errror('from_rect called with illegal parameters')
end
-- sanity check on size
-- FIXME: this limit is far too high
if r[k]+.5==r[k] or r[k]-.5==r[k] then
errror('Bb:from_rect: ' .. r[k] ..' greater than maxint')
end
local b = {}
local eps = 0.000001
b.x1, b.x2 = math.floor(math.min(r.x1, r.x2) + eps),
math.ceil(math.max(r.x1, r.x2) - eps)
b.y1, b.y2 = math.floor(math.min(r.y1, r.y2) + eps),
math.ceil(math.max(r.y1, r.y2) - eps)
if b.x1==b.x2 or b.y1==b.y2 then
errror('from_rect: width or height is zero')
end
setmetatable(b, {__index=self})
return b
end
end
Bb.bb_pat = '^%s*%%%%BoundingBox:'
Bb.bb_end = '^%s*%%%%BoundingBox:%s*%(%s*atend%s*%)'
function Bb:from_comment(s)
local p = self.bb_pat..'%s*([-+%d]+)'..string.rep('%s+([-+%d]+)',3)
local b = {}
b.x1, b.y1, b.x2, b.y2 = string.match(s, p)
if not b.y2 then
errror('Bb.from_comment: illegal boundingbox string ' .. s)
end
for _,k in ipairs(self.coords) do
b[k] = tonumber(b[k])
end
return Bb:from_rect(b)
end
--[[ some no-longer-used bbox functions
function Bb:copy ()
local b = {}
for _,k in ipairs(self.coords) do b[k] = self[k] end
setmetatable(b, {__index=self})
end
function Bb:width()
return self.x2 - self.x1
end
function Bb:height()
return self.y2 - self.y1
end
function Bb:expand ()
-- in-place expansion; does not return an object.
-- any point in preserving non-negativity?
local i = settings.bb_spread
if i and i>0 then
-- if x1~=0 then x1 = x1-1 end
-- if y1~=0 then y1 = y1-1 end
self.x1 = self.x1 - 1
self.y1 = self.y1 - 1
self.x2 = self.x2 + 1
self.y2 = self.y2 + 1
end
end
-- gs handles this now
-- call this via pcall
function Bb:wrapper()
local fn = mktemp('ps')
local f = io.open(fn, 'wb')
f:write(string.format('%%%%BoundingBox: 0 0 %d %d\n',
self:width(), self:height())
.. string.format('<< /PageSize [%d %d] >> setpagedevice\n',
self:width(), self:height())
.. 'gsave\n'
.. string.format('%d %d translate\n', -self.x1, -self.y1))
f:close()
return fn
end
--]]
function Bb:nonnegative ()
return self.x1>=0 and self.y1>=0
end
function Bb:comment()
-- if options.debug then print(debug.traceback()) end
return string.format('%%%%BoundingBox: %d %d %d %d',
self.x1, self.y1, self.x2, self.y2)
end
-- hires boundingboxes ---------------------------------------------
HRBb = {}
setmetatable(HRBb, {__index=Bb})
function HRBb:from_rect(r)
for _,k in ipairs(self.coords) do
if not r[k] or type(r[k])~='number' then
errror('from_rect called with illegal parameters')
end
-- sanity check on size
if r[k]+.5==r[k] or r[k]-.5==r[k] then
errror('HRBb:from_rect: ' .. b[k] ..' greater than maxint')
end
local b = {}
b.x1, b.x2 = math.min(r.x1, r.x2), math.max(r.x1, r.x2)
b.y1, b.y2 = math.min(r.y1, r.y2), math.max(r.y1, r.y2)
if b.x1==b.x2 or b.y1==b.y2 then
errror('from_rect: width or height is zero')
end
setmetatable(b, {__index=self})
return b
end
end
HRBb.bb_pat = '^%s*%%%%HiResBoundingBox:'
HRBb.bb_end = '^%s*%%%%HiResBoundingBox:%s*%(%s*atend%s*%)%s*$'
function HRBb:from_comment(s)
-- dbg('hrbb from '..s)
local p = self.bb_pat..'%s*([-+.%deE]+)'..string.rep('%s+([-+.%deE]+)',3)
local b = {}
b.x1, b.y1, b.x2, b.y2 = string.match(s, p)
if not b.y2 then
errror('HRBb.from_comment: illegal boundingbox string ' .. s)
end
for _,k in ipairs(self.coords) do
b[k] = tonumber(b[k])
end
return HRBb:from_rect(b)
end
function HRBb:comment()
return string.format('%%%%HiResBoundingBox: %f %f %f %f',
self.x1, self.y1, self.x2, self.y2)
end
--[[
function HRBb:expand ()
errror('HRBb:expand not available')
end
-- no longer used: gs handles this
-- call this one also via pcall
function HRBb:wrapper()
-- local fn = mktemp('ps')
-- local f = io.open(fn, 'wb')
-- f.write(string.format('<< /PageSize [%f %f] >> setpagedevice\n',
-- self.x2 - self.x1, self.y2 - self.y1))
-- f.write(string.format('gsave\n%f %f translate\n', -self.x1, -self.y1))
-- f:close()
-- return fn
return string.format(
'<< /PageSize [%f %f] >> setpagedevice gsave %f %f translate',
self.x2 - self.x1, self.y2 - self.y1, -self.x1, -self.y1)
end
--]]
-- manipulating eps/ps/pdf files -----------------------------------
function identify(path)
local f = io.open(path, 'rb')
if not f then
errror('Failure to open '..path..' for identification')
end
local filestart= f:read(23)
f:close()
if not filestart or filestart=='' then
return false
elseif string.match(filestart,'^\197\208\211\198') then -- c5 d0 d3 c6
return 'epsPreview'
elseif string.match(filestart,'^%%!PS%-Adobe%-%d%.%d EPSF%-%d%.%d') then
return 'eps'
elseif string.match(filestart,'^%%!PS%-Adobe%-%d%.%d') then
for _, p in ipairs({'.eps', '.epi', '.epsi', '.epsf'}) do
if string.sub(string.lower(path), -1-string.len(p),-1) == p then
return 'eps'
else
return 'ps'
end
end
return 'ps'
elseif string.match(filestart, '^%%PDF') then
return 'pdf'
else
return false
end
end -- identify
function pdf_props(path)
local pdfdoc = epdf.open(path)
if not pdfdoc then
errror('epdf.open failed on '..path)
end
-- if os.type=='windows' then waitasec() end
local cat = pdfdoc:getCatalog()
if not cat then
errror('Cannot open pdf catalog of '..path)
end
local pg = cat:getNumPages()
if not pg then
errror('Cannot read n. of pages of '..path)
end
local maver = pdfdoc:getPDFMajorVersion()
if not maver then
errror('Cannot read pdf major version of '..path)
end
local miver = pdfdoc:getPDFMinorVersion()
if not miver then
errror('Cannot read pdf minor version of '..path)
end
if maver > 1 then
print(path..' has pdf major version \n'..tostring(maver)..
' which is unsupported;\n'..
'Continuing with fingers crossed...')
end
return pg, miver, maver
end
function info (infile)
local intype = identify(infile)
if not intype then
print(infile..' has an unsupported filetype.')
elseif intype~='pdf' then
print(infile..' has type '..intype..'.')
else
local pg, miver, maver = pdf_props(infile)
print(infile..' has type pdf, version '..tostring(maver)..
'.'..tostring(miver)..' and has '..tostring(pg)..' pages.')
end
os.exit()
end
-- PsPdf object -------------------------------------------------
PsPdf = {}
-- creators
function PsPdf:new(ext)
-- dbg('PsPdf:new')
local psp = {}
setmetatable(psp, {__index = self})
-- assign temp file
psp.path = mktemp(string.lower(ext))
if string.lower(ext)=='pdf' then
psp.type = 'pdf'
elseif string.lower(ext)=='eps' then
psp.type = 'eps'
elseif string.lower(ext)=='ps' then
psp.type = 'ps'
else
psp.type = false
end
if psp.type=='eps' then
psp.pages = 1
end
psp.bb = false
psp.hrbb = false
return psp
end -- PsPdf:new
function PsPdf:from_path(path)
-- dbg('PsPdf:from_path')
local psp = {}
setmetatable(psp, {__index = self})
psp.path = path
if lfs.isfile(path) then
-- turn existing file into PsPdf object.
psp.type = identify(psp.path)
if psp.type=='pdf' then
psp.pages, psp.miver, psp.maver = pdf_props(psp.path)
end
else
errror('PsPdf:from_path called with non-existant file '..path)
end
if psp.type=='eps' then
psp.pages = 1
end
psp.bb = false
psp.hrbb = false
-- calculate when needed
return psp
end -- PsPdf:from_path
--[===[ getting boundingbox property from file itself --------------
find_bb_simple: use only for eps PsPdf objects we generated
ourselves, so we can assume that the bbox comments are in the header
and the hires bb lies within the lores bb.
Of course the file itself is not rewritten.
--]===]
function PsPdf:find_bb_simple()
-- dbg('PsPdf:find_bb_simple')
if self.type~='eps' then
errror('find_bb_simple called with non-eps file '..self.path)
end
self.bb = false
self.hrbb = false
local slurp = false
local f = io.open(self.path, 'rb')
if f then
slurp = f:read(bufsize)
f:close()
end
lines = {}
for l in string.gmatch(slurp, '[^\n\r]+') do
if string.match(l, Bb.bb_pat) then
self.bb = Bb:from_comment(l)
elseif string.match(l, HRBb.bb_pat) then
self.hrbb = HRBb:from_comment(l)
elseif self.bb then
break -- stop looking; we expect hrbb next to bb
end
if self.bb and self.hrbb then break end
end
if not self.bb then
errror('No valid boundingbox for generated file' .. self.path)
end
return self -- no real need for a return value
end
function PsPdf:bb_from_gs(pg)
-- dbg('bb_from_gs '..pg)
if self.type=='ps' then
errror('bb_from_gs called with ps file '..self.path)
-- not needed for generic PostScript,
-- page selection only works with pdf files, so we save ourselves
-- the trouble of picking the right bbox from a list
end
if self.type=='eps' and not self.bb:nonnegative() then
errror('bb_from_gs called on ' .. self.path ..
' which has some negative boundingbox coordinates')
end
-- A pdf can also have negative ...Box coordinates, but apparently
-- for pdf the bbox returned by gs is relative to the lower-left corner.
-- Anyhow, with pdf it all works out even with negative coordinates.
-- Since Ghostscript writes the boundingbox comments to stderr,
-- we need a shell to intercept this output:
local bb_file = mktemp('dsc')
local cmdline = gs_prog .. ' ' .. table.concat(gs_options,' ')
if self.type=='pdf' then
if not pg then pg=1 end
cmdline = cmdline .. ' -dFirstPage#' .. tostring(pg) ..
' -dLastPage#' .. tostring(pg)
end
cmdline = cmdline .. ' -sDEVICE#bbox ' .. self.path .. ' 2>'..bb_file
-- execute shell command
local r, cmd
write_log('os.execute: '..cmdline)
r = os.execute(cmdline)
if not r then
errror('Cannot get fixed boundingbox for '..self.path)
end
-- read new bbox from ghostscript output
-- can we really count on the plain bb coming first?
-- OTOH, I would rather not introduce unnecessary complexity
-- still, it may be better to match each line with [HR]Bb_pat
local bb = false
local hrbb = false
local fin = io.open(bb_file, 'r')
if fin then
for i=1,10 do -- actually, 2 should suffice
local l = fin:read("*line")
if not l then break end
if string.match(l, Bb.bb_pat) then
bb = Bb:from_comment(l)
end
if string.match(l, HRBb.bb_pat) then
hrbb = HRBb:from_comment(l)
end
end
fin:close()
end
if not bb or not hrbb then
errror('Cannot get fixed boundingbox for '..self.path)
end
return bb, hrbb
end
-- eps_clean: remove some problem features from eps (new file & object)
function PsPdf:eps_clean()
-- return a PsPdf object referring to a new file
-- without a preview header and with boundingbox(es) in the header
local function bytes2num (s, i)
-- convert substring s[i..i+3] to a number.
-- by working byte for byte we avoid endian issues
local n = string.byte(s, i+3)
for j=2,0,-1 do n = 256*n + string.byte(s, i+j) end
return n
-- somehow the explicit expression below didn't work
-- return ((256 * (256 * (256 * string.byte(s,i+3)) + string.byte(s,i+2))
-- + string.byte(s,i+1)) + string.byte(s,i))
end
-- dbg('PsPdf:eps_clean '..self.path)
if self.type~='eps' and self.type~='epsPreview' then
errror('epsclean called with non-eps file ' .. self.path)
end
local offset, ps_length = false, false
local fin, fout
if self.type=='eps' then
offset = 0
ps_length = lfs.attributes(self.path, 'size')
else
-- read TOC; see Adobe EPS specification
-- interpret byte for byte, in case the platform is not little-endian
fin = io.open(self.path, 'rb')
if fin then
local toc = fin:read(12)
fin:close()
if toc and string.len(toc)==12 then
offset = bytes2num(toc, 5)
ps_length = bytes2num(toc, 9)
end
end
if not offset then
errror('Could not read preview header of ' .. self.path)
end
-- dbg(tostring(offset)..' '..tostring(ps_length))
end
-- create the PsPdf object which is to be returned
local psp
psp = PsPdf:new('eps')
-- dbg(psp.path)
-- read an initial and if necessary a final chunk of the file
-- to find boundingbox comments.
local atend = false
local hr_atend = false
local slurp -- the read buffer
local l -- contains current scanned line; split off from slurp
-- pre_lines: scanned header lines; alternately lines and eols
local pre_lines = {}
-- new_offset: offset plus combined length of scanned header lines
local new_offset = offset
-- post_lines: scanned trailer lines
local post_lines = {}
-- middle_length: ps_length minus scanned header- and and maybe trailer parts
-- this is the length of file that will be copied wholesale.
local middle_length
local i, i_bb, i_hrbb
local j, j_bb, j_hrbb, j_end
-- j_end: index of final scanned trailer line
-- no i_end necessary: for header lines we can use #pre_lines.
fin = io.open(self.path, 'rb')
if not fin then errror('Cannot read '..self.path) end
fin:seek('set', offset)
-- remaining, unscanned length of input buffer slurp
local unscanned = math.min(ps_length,bufsize)
-- dbg('bytes to be read: '..tostring(unscanned))
slurp = fin:read(unscanned)
-- dbg('Read from '..self.path..': '..string.len(slurp)..' bytes')
-- unnecessary:
psp.bb = nil
psp.hrbb = nil
i, i_bb, i_hrbb = 0, false, false
while unscanned>0 do
i = i+1
if string.find(slurp,'[\n\r]')==1 then
l,slurp = string.match(slurp, '^([\n\r]+)(.*)$')
else
l,slurp = string.match(slurp, '^([^\n\r]+)(.*)$')
if string.match(l, Bb.bb_end) then
atend = true
i_bb = i
elseif string.match(l, Bb.bb_pat) then
-- dbg(l)
psp.bb = Bb:from_comment(l)
-- dbg(psp.bb:comment())
-- from_comment errors out on failure; no need to check return value
i_bb = i
elseif string.match(l, HRBb.bb_end) then
hr_atend = true
i_hrbb = i
elseif string.match(l, HRBb.bb_pat) then
-- dbg(l)
psp.hrbb = HRBb:from_comment(l)
-- dbg(psp.hrbb:comment())
i_hrbb = i
end -- bbox line
end -- eol/non-eol
pre_lines[i] = l
unscanned = unscanned - string.len(l)
if (i_bb and (i_hrbb or (i_bb<(i-1)))) or unscanned<=0 then
-- condition i_bb<i-1:
-- We do not want to find the hrbb of an included eps.
-- Therefore we stop looking for hrbb if it is not next to bb
-- (with an intervening eol)
-- Note that the header comments are not necessarily terminated
-- with a %%EndComments line; see Adobe DSC spec 5001
break
end -- deciding whether to stop
end -- while
new_offset = offset + string.len(table.concat(pre_lines))
middle_length = ps_length - string.len(table.concat(pre_lines))
if atend or hr_atend then
-- find boundingbox comments, starting from end of postscript
if ps_length>bufsize then
fin:seek('set',offset+ps_length-bufsize)
unscanned = bufsize
slurp = fin:read(unscanned)
else
-- use what is left from old slurp
unscanned = string.len(slurp)
end
j = 1 -- count down from 0
j_bb, j_hrbb, j_end = false, false, false
while unscanned>0 do
j = j - 1
-- dbg(j)
if string.find(slurp,'[\n\r]', string.len(slurp)) then
-- dbg('eol(s)')
slurp,l = string.match(slurp, '^(.-)([\n\r]+)$')
-- '-': non-greedy matching
else
slurp,l = string.match(slurp, '^(.-)([^\n\r]+)$')
-- dbg(l)
if string.match(l, Bb.bb_pat) then
psp.bb = Bb:from_comment(l)
j_bb = j
elseif string.match(l, HRBb.bb_pat) then
psp.hrbb = HRBb:from_comment(l)
j_hrbb = j
end -- bbox line
end -- eol/non-eol
post_lines[j] = l
unscanned = unscanned - string.len(l)
if (psp.bb and
(psp.hrbb or not hr_atend or j_bb>(j+1))) or unscanned<=0 then
-- stop looking
j_end = j
break
end -- deciding whether to stop
end -- while
middle_length = middle_length -
string.len(table.concat(post_lines, '', j_end, 0))
end --if atend
fin:close()
-- fix boundingbox lines
if atend and j_bb then
-- pre_lines[i_bb] = post_lines[j_bb]
pre_lines[i_bb] = psp.bb:comment() -- WHY DOESNT THIS WORK ????
post_lines[j_bb] = ''
post_lines[j_bb+1] = ''
end
if hr_atend and j_hrbb then
-- dbg(psp.hrbb:comment())
-- pre_lines[i_hrbb] = post_lines[j_hrbb]
pre_lines[i_hrbb] = psp.hrbb:comment()
post_lines[j_hrbb] = ''
post_lines[j_hrbb+1] = ''
end
-- create cleaned eps file
fout = io.open(psp.path, 'wb')
if not fout then errror('Cannot create new file '..psp.path) end
fout:write(table.concat(pre_lines))
fout:close()
slice_file(self.path, psp.path, middle_length, new_offset, 'ab')
fout = io.open(psp.path, 'ab')
fout:write(table.concat(post_lines, '', j_end, 0))
fout:close()
return psp
end -- eps_clean
-- tight boundingbox (new file & object)
function PsPdf:eps_crop()
-- not a proper conversion, although
-- we use the Ghostscript bbox device for a tight boundingbox.
-- We use both the regular and the hires boundingbox from gs.
-- The eps should already have been cleaned up by eps_clean,
-- and the current boundingbox should not contain negative coordinates,
-- otherwise the bbox output device may give incorrect results.
-- Only the boundingbox in the eps is rewritten.
-- dbg('PsPdf:eps_crop '..self.path)
if self.type~='eps' then
errror('eps_crop called with non-eps file ' .. self.path)
end
-- create the PsPdf object which is to be returned
local psp = PsPdf:new('eps')
-- read new bbox from ghostscript output
psp.bb, psp.hrbb = self:bb_from_gs()
-- rewrite header with new boundingboxes
local slurp -- the read buffer
local l -- contains current scanned line; split off from slurp
-- pre_lines: scanned header lines; alternately lines and eols
local pre_lines = {}
-- offset: combined length of scanned header lines
local offset = 0
local ps_length = lfs.attributes(self.path, 'size')
local i, i_bb, i_hrbb
fin = io.open(self.path, 'rb')
if not fin then errror('Cannot read '..self.path) end
-- remaining, unscanned length of input buffer slurp
local unscanned = math.min(ps_length,bufsize)
-- dbg('bytes to be read: '..tostring(unscanned))
slurp = fin:read(unscanned)
-- dbg('Read from '..self.path..': '..string.len(slurp)..' bytes')
i, i_bb, i_hrbb = 0, false, false
while unscanned>0 do
i = i+1
if string.find(slurp,'[\n\r]')==1 then
l,slurp = string.match(slurp, '^([\n\r]+)(.*)$')
else
l,slurp = string.match(slurp, '^([^\n\r]+)(.*)$')
if string.match(l, Bb.bb_pat) then
i_bb = i
elseif string.match(l, HRBb.bb_pat) then
i_hrbb = i
end -- bbox line
end -- eol/non-eol
pre_lines[i] = l
unscanned = unscanned - string.len(l)
if (i_bb and (i_hrbb or (i_bb<(i-1)))) or unscanned<=0 then
break
end
end -- while
fin:close()
offset = string.len(table.concat(pre_lines))
if i_hrbb then
pre_lines[i_bb] = psp.bb:comment()
pre_lines[i_hrbb] = psp.hrbb:comment()
else
-- jam both bbox comments into one slot, with an intervening eol.
-- for the sake of conformity, we copy an existing eol.
pre_lines[i_bb] = psp.bb:comment() .. pre_lines[i_bb-1] ..
psp.hrbb:comment()
end
-- write a new eps file
fout = io.open(psp.path, 'wb')
if not fout then errror('Cannot write new file '.. psp.path) end
fout:write(table.concat(pre_lines))
fout:close()
slice_file(self.path, psp.path,
lfs.attributes(self.path,'size') - offset, offset, 'ab')
options.bbox = false
-- dbg('eps_crop from '..self.path..' to '..psp.path)
return psp
end -- eps_crop
--[===[ real conversions involving a single call of gs, pdftops or texlua
Each conversion fullfills all options that it can: gray, bbox and
page. gray when converting to pdf, bbox when converting from eps or
from pdf to pdf and page when converting from pdf. It then sets the
fullfilled option(s) to false.
We like to preserve fonts as fonts. gs does this when generating
pdf, but may fail for fonts such as cid and large truetype when
generating PostScript. In such cases, pdftops may succeed. However,
it seems that if the page contains an element that does not cleanly
convert, pdftops simply rasterizes the entire page, and that this
choice is made per page.
--]===]
-- TODO: multiple pages?
-- (means additional parameter checking)
-- Converting from pdf to pdf using luatex; no grayscaling
function PsPdf:pdf_crop()
-- options to be fulfilled: page, boundingbox
-- only called directly.
-- embeds the pdf with crop parameters into a new (lua)tex document
-- dbg('PsPdf:pdf_crop '..self.path)
if not (options.bbox or options.page) then
return self
end
if options.page and options.page > self.pages then
errror('PsPdf:pdf_crop called with non-existent page '.. options.page)
end
local pg = options.page or 1
local bb, hrbb, pgbox, pgboxname
do
local pdoc, pcat, ppage
-- we already have the pages, miver and maver properties
-- but need properties of the desired page as well
pdoc = epdf.open(self.path)
if not pdoc then
errror('Epdf: cannot open '..self.path)
end
-- dbg('about to get catalog')
pcat = pdoc:getCatalog()
if not pcat then
errror('Cannot open catalog of '..self.path)
end
-- dbg('got catalog')
ppage = pcat:getPage(pg)
if not ppage then
errror('Epdf: cannot open page object '..tostring(pg)..' of '..self.path)
end
pgboxname = 'trimbox'
pgbox = ppage:getTrimBox()
if not pgbox then
pgboxname = 'cropbox'
pgbox = ppage:getCropBox()
end
if not pgbox then
pgboxname = 'mediabox'
pgbox = ppage:getMediaBox()
end
-- normalization and further checks, including for non-nil,
-- by Bb:from_rect, which errors out on failures
pgbox = HRBb:from_rect(pgbox)
end
if options.bbox then
bb, hrbb = self:bb_from_gs(pg)
else
hrbb = pgbox
end
-- luatex on searchpath
local luatex_prog = 'luatex'
-- write TeX file which includes cropped pdf page
-- adapted from Heiko Oberdiek's pdfcrop utility.
-- the table `pieces' will contain the component strings for the tex source
-- first, for texlua <= 0.81
local pieces = {}
if status.luatex_version <= 80 then
pieces[1] = '\\pdfoutput=1\n'
else
pieces[1] = [[
\edef\pdfminorversion {\pdfvariable minorversion}
\edef\pdfcompresslevel {\pdfvariable compresslevel}
\edef\pdfobjcompresslevel {\pdfvariable objcompresslevel}
\edef\pdfdecimaldigits {\pdfvariable decimaldigits}
\edef\pdfhorigin {\pdfvariable horigin}
\edef\pdfvorigin {\pdfvariable vorigin}
\let\pdfpagewidth\pagewidth
\let\pdfpageheight\pageheight
\let\pdfximage\saveimageresource
\let\pdfrefximage\useimageresource
\let\pdflastximage\lastsavedimageresourceindex
\outputmode=1
]]
end
if self.maver > 1 then
pieces[2] = '\\pdfminorversion=9\n'
else
pieces[2] = '\\pdfminorversion=' .. self.miver .. '\n'
end
if self.maver > 1 or self.miver > 4 then
pieces[3] = [[
\pdfcompresslevel=9
\pdfobjcompresslevel=2
\pdfdecimaldigits=4
]]
else
pieces[3] = [[
\pdfcompresslevel=9
\pdfobjcompresslevel=0
\pdfdecimaldigits=4
]]
end
pieces[4] = [[
\def\page #1 [#2 #3 #4 #5]{%
\count0=#1\relax
\setbox0=\hbox{%
\pdfximage page #1 mediabox{]]
pieces[5] = self.path
pieces[6] = [[}%
\pdfrefximage\pdflastximage
}%
\pdfhorigin=-#2bp\relax
\pdfvorigin=#3bp\relax
\pagewidth=#4bp\relax
\advance\pagewidth by -#2bp\relax
\pageheight=#5bp\relax
\advance\pageheight by -#3bp\relax
\ht0=\pageheight
\shipout\box0\relax
}
]]
pieces[7] = string.format([[
\page %d [%f %f %f %f]
\csname @@end\endcsname
\end
]],
options.page or 1, hrbb.x1, hrbb.y1, hrbb.x2, hrbb.y2)
local textemp = mktemp('tex') -- this also took care of pdf:
local pdftemp = string.gsub(textemp, 'tex$', 'pdf')
-- if os.type=='windows' then waitasec() end
local f = io.open(textemp, 'w')
-- if os.type=='windows' then waitasec() end
f:write(table.concat(pieces, ''))
f:close()
local cmd, res, psp
if os.type=='unix' then
cmd = {luatex_prog, '--safer', '--no-shell-escape', textemp}
log_cmd(cmd)
res = os.spawn(cmd)
else
cmd = luatex_prog..' --safer --no-shell-escape '..textemp
log_cmd({cmd})
-- os.execute('timeout /t 1 /nobreak >nul')
res = os.execute(cmd)
end
if res and res==0 and lfs.attributes(pdftemp, 'size')>0 then
psp = PsPdf:from_path(pdftemp)
return psp
else
errror('pdf_crop failed on '..self.path)
end
end
function PsPdf:eps_to_pdf()
-- option to be fulfilled: gray
-- set target and pdf version if applicable
-- dbg('PsPdf:eps_to_pdf '..self.path)
if self.type~='eps' then
errror('PsPdf:eps_to_pdf called for non-eps file '.. self.path)
end
local cmd
if options.bbox and self.bb:nonnegative() then
self = self:eps_crop() -- this sets options.bbox to false
end
cmd = tab_combine({{gs_prog}, gs_options, pdf_options})
-- dbg(table.concat(cmd,' '))
if options.gray then
cmd = tab_combine({cmd, gray_options})
-- dbg(table.concat(cmd,' '))
options.gray = false
end
table.insert(cmd, '-dEPSCrop') -- always hires bb
-- dbg(table.concat(cmd,' '))
local psp = PsPdf:new('pdf')
table.insert(cmd, '-sOutputFile#'..psp.path)
-- dbg(table.concat(cmd,' '))
cmd = tab_combine({cmd, pdf_tail_options, {self.path}})
-- dbg(table.concat(cmd,' '))
log_cmd(cmd)
local res = os.spawn(cmd)
if res and res==0 and lfs.attributes(psp.path, 'size')>0 then
psp.pages, psp.miver, psp.maver = pdf_props(psp.path)
return psp
else
errror('eps_to_pdf failed on '..self.path)
end
end -- eps_to_pdf
-- Converting from pdf to pdf with grayscaling and/or page selection
function PsPdf:pdf_to_pdf()
-- option to be fulfilled: gray and optionally page.
-- do not call this just for page selection because
-- pdf_crop can do this in a less invasive manner
-- dbg('PsPdf:pdf_to_pdf '..self.path)
if self.type~='pdf' then
errror('PsPdf:pdf_to_pdf called for non-pdf file '.. self.path)
end
local cmd
if options.page and options.page > self.pages then
errror('PsPdf:pdf_to_pdf called with non-existent page '.. options.page)
end
cmd = tab_combine({{gs_prog}, gs_options, pdf_options})
-- dbg(table.concat(cmd,' '))
if options.gray then
cmd = tab_combine({cmd, gray_options})
-- dbg(table.concat(cmd,' '))
options.gray = false
end
if options.page then
table.insert(cmd, '-dFirstPage#'..tostring(options.page))
table.insert(cmd, '-dLastPage#'..tostring(options.page))
-- dbg(table.concat(cmd,' '))
options.page = false
end
local psp = PsPdf:new('pdf')
table.insert(cmd, '-sOutputFile#'..psp.path)
cmd = tab_combine({cmd, pdf_tail_options})
-- dbg(table.concat(cmd,' '))
table.insert(cmd, self.path)
-- dbg(table.concat(cmd,' '))
log_cmd(cmd)
local res = os.spawn(cmd)
if res and res==0 and lfs.attributes(psp.path, 'size')>0 then
psp.pages, psp.miver, psp.maver = pdf_props(psp.path)
return psp
else
errror('pdf_to_pdf failed on '..self.path)
end
end -- pdf_to_pdf
function PsPdf:pdf_to_eps()
-- options to be fulfilled: bbox and page
-- dbg(tostring(settings.pdftops_prog))
-- dbg('pdf_to_eps '..self.path)
local psp = PsPdf:new('eps')
local cmd, res
local page = false
if self.pages > 1 then
if options.page then
page = options.page
if page > self.pages then
errror('PsPdf:pdf_to_eps called with non-existant page '..
tostring(page))
end
else
page = 1
end
page = tostring(page)
end -- self.pages > 1
if pdftops then
if page then
cmd = tab_combine({{pdftops}, ps_options,
{'-f', page, '-l', page,
'-eps', self.path, psp.path}})
else
cmd = tab_combine({{pdftops}, ps_options,
{'-eps', self.path, psp.path}})
end
options.page = false
log_cmd(cmd)
if os.type=='windows' then
-- suppress console output of 'No display font for...' messages,
-- which are usually harmless and for which I know no easy fix
-- pdftops -q does not do the trick on Windows,
-- and redirection to logfile gives access denied under miktex
-- res = os.spawn({'cmd', '/c', table.concat(cmd, ' ')..' 2>>'..log_bsl})
res = os.execute(table.concat(cmd, ' ')..' 2>nul')
else
res = os.spawn(cmd)
end
if res and res==0 and lfs.attributes(psp.path, 'size')>0 then
psp.pages = 1
else
errror('pdf_to_eps failed on '..self.path)
end
-- fix for incorrect DSC header produced by some versions of pdftops:
-- if necessary, change line `% Produced by ...' into `%%Produced by ...'
-- this is usually the second line.
-- otherwise the DSC header would be terminated before the bbox comment.
-- this problem exists with pdftops from TL2011/w32.
local slurp -- input buffer
local fin = io.open(psp.path, 'rb')
if not fin then errror('Cannot read '..psp.path) end
-- remaining, unscanned length of input buffer slurp
local unscanned = math.min(lfs.attributes(psp.path, 'size'),bufsize)
slurp = fin:read(unscanned)
local i, i_bb = 0, false
local needs_fixing = false
local pre_lines = {}
local offset = 0
while unscanned>0 do
i = i+1
if string.find(slurp,'[\n\r]')==1 then
l,slurp = string.match(slurp, '^([\n\r]+)(.*)$')
else
l,slurp = string.match(slurp, '^([^\n\r]+)(.*)$')
if string.match(l, Bb.bb_pat) then
-- bbox line
i_bb = i
elseif string.match(l, '^%%%s') then -- `%' is escape char: doubled
-- %X with X printable would be ok
needs_fixing = true
-- fix rightaway
l = string.gsub(l, '^%%%s', '%%%%') -- same length
end
end -- eol/non-eol
pre_lines[i] = l
unscanned = unscanned - string.len(l)
offset = offset + string.len(l)
if i_bb then break end
end -- while
fin:close()
if needs_fixing then
-- write a new eps file
local newfile = mktemp('eps')
fout = io.open(newfile, 'wb')
if not fout then errror('Cannot write new file '.. newfile) end
fout:write(table.concat(pre_lines))
fout:close()
-- dbg('fixing '..psp.path..' to '..newfile)
slice_file(psp.path, newfile,
lfs.attributes(psp.path,'size') - offset, offset, 'ab')
psp.path = newfile
end -- needs_fixing
else -- use ghostscript
local epsdev = epsdevice()
if not epsdev then
errror('Conversion to eps not supported by this ghostscript')
end
cmd = tab_combine({{gs_prog}, gs_options,
{'-sDEVICE#'..epsdev, '-dHaveTrueTypes=true', '-dLanguageLevel#3'}})
-- the restrictions on eps files are apparently
-- incompatible with grayscaling
if options.page then
table.insert(cmd, '-dFirstPage='..options.page)
table.insert(cmd, '-dLastPage='..options.page)
end
table.insert(cmd, '-sOutputFile='..psp.path)
table.insert(cmd, self.path)
options.page = false
log_cmd(cmd)
res = os.spawn(cmd)
if res and res==0 and lfs.attributes(psp.path, 'size')>0 then
psp.pages = 1
else
errror('pdf_to_eps failed on '..self.path)
end
end -- use ghostscript
psp:find_bb_simple()
if options.bbox then psp = psp:eps_crop() end
return psp
end -- pdf_to_eps
function PsPdf:ps_to_pdf()
-- options to be fulfilled: gray
-- dbg('PsPdf:ps_to_pdf '..self.path)
if self.type~='ps' then
errror('PsPdf:ps_to_pdf called for non-ps file '.. self.path)
end
local cmd
cmd = tab_combine({{gs_prog}, gs_options, pdf_options})
if options.gray then
cmd = tab_combine({cmd, gray_options})
options.gray = false
end
local psp = PsPdf:new('pdf')
table.insert(cmd, '-sOutputFile#'..psp.path)
cmd = tab_combine({cmd, pdf_tail_options})
table.insert(cmd, self.path)
log_cmd(cmd)
local res = os.spawn(cmd)
if res and res==0 and lfs.attributes(psp.path, 'size')>0 then
psp.pages, psp.miver, psp.maver = pdf_props(psp.path)
return psp
else
errror('ps_to_pdf failed on '..self.path)
end
end -- PsPdf:ps_to_pdf
function PsPdf:pdf_to_ps()
-- options to be fulfilled: page and, if not using pdftops, also gray
-- dbg('PsPdf:pdf_to_ps '..self.path)
local psp = PsPdf:new('ps')
local page = false
if self.pages>1 then
if options.page and options.page > self.pages then
errror('PsPdf:pdf_to_ps called with non-existant page '.. options.page)
elseif options.page then
page = tostring(options.page)
psp.pages = 1
end
else
psp.pages = self.pages
end
local cmd, res
if pdftops then
cmd = tab_combine({{pdftops}, ps_options})
if page then
cmd = tab_combine({cmd, {'-f', page, '-l', page}})
end
cmd = tab_combine({cmd, {'-paper', 'match', self.path, psp.path}})
else -- use ghostscript
cmd = tab_combine({{gs_prog}, gs_options,
{'-sDEVICE#ps2write', '-dHaveTrueTypes=true', '-dLanguageLevel#3'}})
if options.gray then
cmd = tab_combine({cmd, gray_options})
-- dbg(table.concat(cmd,' '))
options.gray = false
end
if page then
cmd = tab_combine({cmd, {'-dFirstPage#'..page, '-dLastPage#'..page}})
end
table.insert(cmd, '-sOutputFile#'..psp.path)
-- table.insert(cmd, '-f')
table.insert(cmd, self.path)
end
options.page = false
log_cmd(cmd)
if os.type=='windows' and pdftops then
-- suppress console output of 'No display font for...' messages,
-- which are usually harmless and for which I know no easy fix
-- pdftops -q does not do the trick on Windows,
-- and redirection to logfile gives access denied under miktex
-- res = os.spawn({'cmd', '/c', table.concat(cmd, ' ')..' 2>>'..log_bsl})
res = os.execute(table.concat(cmd, ' ')..' 2>nul')
else
res = os.spawn(cmd)
end
if res and res==0 and lfs.attributes(psp.path, 'size')>0 then
return psp
else
errror('pdf_to_ps failed on '..self.path)
end
end -- PsPdf:pdf_to_ps
function PsPdf:any_to_any()
-- weed out nonsense options
-- dbg('PsPdf:any_to_any '..self.path)
if options.type=='ps' then
options.bbox = false
-- dbg('Ignoring bbox option for ps output')
end
if options.bbox and not options.page then
options.page = 1
-- dbg('Selecting page 1 for bbox')
end
if self.pages==1 then
options.page = false
-- dbg('dropping page selection; source is already a 1-page document')
end
-- for _,o in ipairs({'page', 'gray', 'bbox'}) do
-- -- if options[o] then dbg('Do option '..o) end
-- end
-- `distiller' settings depend on whether final output is pdf
-- '.setpdfwrite' is just some optimization option for ghostscript
if options.type=='pdf' then
if settings.pdf_version~='default' then
table.insert(pdf_options, '-dCompatibilityLevel#'..settings.pdf_version)
end
-- below, consider adding <</NeverEmbed [/Times-Roman /TimesBold ...]>>
if settings.pdf_target=='screen' or settings.pdf_target=='ebook' then
pdf_tailoptions = {'-c', '.setpdfwrite', '-f'}
-- -f ensures that the input filename is not added to the -c string
else
pdf_tailoptions = {
'-c', '.setpdfwrite <</NeverEmbed [ ] >> setdistillerparams', '-f'}
end
else
pdf_tailoptions = {
'-c', '.setpdfwrite <</NeverEmbed [ ] >> setdistillerparams', '-f'}
end
if options.type=='pdf' then
table.insert(pdf_options, '-dPDFSETTINGS#/'..settings.pdf_target)
if settings.pdf_version~='default' then
table.insert(pdf_options, '-dCompatibilityLevel#'..settings.pdf_version)
end
else
table.insert(pdf_options, '-dPDFSETTINGS#/default')
end
--[[
each single-step conversion takes care of options it can handle
and sets those options to false.
for boundingboxes, eps_crop is either called explicitly
or called implicitly by another converter.
pdf_crop is always called explicitly and always as the last step
all calls to external programs work on temporary files
in the then-current temporary directory, with a simple generated
filename. So no need to quote names of input- and output filenames.
--]]
local psp = self
local newfile
if psp.type=='eps' or psp.type=='epsPreview' then
-- As a side effect of eps_clean, the modified source file is copied
-- to the temp subdirectory.
psp = psp:eps_clean()
if options.bbox and psp.bb:nonnegative() then
psp = psp:eps_crop()
end
if options.type=='eps' then
if options.gray or options.bbox then
-- bbox: eps_crop was apparently not applicable: pdf roundtrip
psp = psp:eps_to_pdf():pdf_to_eps()
end
elseif options.type=='pdf' then
psp = psp:eps_to_pdf()
if options.bbox then
psp = psp:pdf_crop()
end
elseif options.type=='ps' then
psp = psp:eps_to_pdf():pdf_to_ps()
end
return psp
elseif psp.type=='ps' then
-- preliminary:
-- copy infile to a file in the temp directory, needed for gs -dSAFER
newfile = mktemp(psp.type)
slice_file(psp.path, newfile)
-- dbg(psp.path..' copied to '..newfile..' in '..lfs.currentdir())
psp.path = newfile
-- actual conversion
if options.type=='eps' then
return psp:ps_to_pdf():pdf_to_eps()
elseif options.type=='pdf' then
if options.bbox or options.page then
return psp:ps_to_pdf():pdf_crop()
else
return psp:ps_to_pdf()
end
elseif options.type=='ps' then
if options.gray or options.page then
return psp:ps_to_pdf():pdf_to_ps()
else
return psp -- no conversion necessary
end
end -- pdf => ps
elseif psp.type=='pdf' then
-- preliminary:
-- copy infile to a file in the temp directory, for gs -dSAFER
newfile = mktemp(psp.type)
slice_file(psp.path, newfile)
-- dbg(psp.path..' copied to '..newfile..' in '..lfs.currentdir())
psp.path = newfile
-- actual conversion
if options.type=='eps' then
if options.gray then
-- one-step grayscaling available for gs/ps but not for gs/eps
return psp:pdf_to_pdf():pdf_to_eps()
else
return psp:pdf_to_eps()
end
elseif options.type=='pdf' then
-- pdf_crop can take care of bbox and page,
-- but not of gray and not of target use or pdf version
do
local need_gs = false
-- compare actual and required versions,
-- allowing for rounding differences
if settings.pdf_version~='default' and
(psp.maver+0.1*psp.miver)>tonumber(settings.pdf_version)-0.01 then
need_gs = true
end
if settings.pdf_target~='default' then
need_gs = true
end
if options.gray then
need_gs = true
end
local need_crop = false
if options.bbox then
need_crop = true
end
if (not need_gs) and options.page then
need_crop = true
end
if need_gs then
psp = psp:pdf_to_pdf()
end
if need_crop or (psp.pages>1 and options.page) then
psp = psp:pdf_crop()
end
return psp
end
elseif options.type=='ps' then
if options.gray and pdftops then
return psp:pdf_to_pdf():pdf_to_ps()
else
return psp:pdf_to_ps()
end
end -- pdf => ps
end -- psp.type=='ps'|'pdf'
end -- any_to_any
-- system-dependent initialization -----------------------------------
-- current directory, at program start
cwd = lfs.currentdir()
if os.type == 'windows' then cwd = string.gsub(cwd, '\\', '/') end
-- child searchpath initially set to parent searchpath
-- childpath = os.getenv('PATH')
-- prepend (lua)tex directory to searchpath, if not already there
maybe_add_path(os.selfdir, false)
-- Windows: miktex, TL or neither. is_miktex, is_tl_w32, auto_psp
-- no support yet for separate ghostscript
is_miktex = false
is_tl_w32 = false
auto_psp = true -- only false for old miktex without included pdftops
if os.type == 'windows' then
if string.find (string.lower(kpse.version()), 'miktex') then
is_miktex = true
else
local rt = string.gsub(os.selfdir,'[\\/][^\\/]+[\\/][^\\/]+$', '')
if not rt then
errror('Unrecognized TeX directory structure', 0)
elseif lfs.isfile(rt..'/release-texlive.txt') then
--[[
-- TL version is easy to determine but is not needed
local fin = io:open(rt..'release-texlive.txt', 'r')
if fin then
local l = fin:read('*line')
tl_ver = string.match(l, 'version%s+(%d+)$')
if tl_ver then tl_ver = tonumber(tl_ver) end
end -- if fin
--]]
is_tl_w32 = true
else
errror('Not MikTeX and no file ' .. rt ..
'/release-texlive.txt; TeX installation not supported.', 0)
end -- if isfile
end -- if not miktex
-- recent miktex and any windows tl include pdftops
if not lfs.isfile(string.gsub(os.selfdir, '\\', '/') .. '/pdftops.exe') then
auto_psp = false
end
end -- if windows
-- without Ghostscript we are dead in the water.
-- TL/w32: add to searchpath
gs_prog = false
do
local rt=''
if os.type == 'unix' then
if find_on_path('gs') then
gs_prog = 'gs'
else
error('No ghostscript on searchpath!', 0)
end
elseif is_miktex then
gs_prog = 'mgs.exe'
-- neither MiKTeX's nor TL's ghostscript need GS_LIB to be set
elseif is_tl_w32 then
-- windows/TeX Live
-- grandparent of texlua.exe directory .. ...
rt = string.gsub(os.selfdir,'[\\/][^\\/]+[\\/][^\\/]+$', '')
..'/tlpkg/tlgs'
maybe_add_path(rt..'/bin', false)
gs_prog = 'gswin32c.exe'
--[[ problems with (at least) grayscaling
gs_prog = 'rungs.exe'
--]]
else
errror('Only TeX Live and MikTeX supported!', 0)
end
end -- do
-- directory for configuration and log
epsdir = ''
if os.type == 'windows' then
epsdir = fw(ep_shortname(os.getenv('APPDATA'))) .. '/epspdf'
else
epsdir = os.getenv('HOME')..'/.epspdf'
end
-- dbg('epsdir: '..epsdir)
rcfile = epsdir .. '/config'
logfile = epsdir .. '/epspdf.log'
-- create epsdir if necessary
if lfs.isfile(epsdir) then
error('Cannot continue; epspdf directory ' .. epsdir .. ' is a file')
elseif not lfs.isdir(epsdir) then
if not lfs.mkdir(epsdir) then
error('Failed to create epspdf directory ' .. epsdir)
end
end
-- start logging ---------------------------------
-- log rotate if logfile too big
if lfs.attributes(logfile) and lfs.attributes(logfile).size > 100000 then
local oldlog = logfile .. '.old'
if lfs.attributes(oldlog) then
if os.remove(oldlog) then os.rename(logfile,oldlog) end
elseif lfs.attributes(logfile) then do
-- separate epsdir runs with empty lines
print_log('\n\nNew run')
end end -- do elseif
end -- if lfs...logfile
write_log('epspdf '..table.concat(arg, ' '))
--[[ some debug output
dbg ('os is ' .. os.type .. ' and ' .. os.name)
dbg ('texlua in ' .. os.selfdir)
dbg('Ghostscript: ' .. gs_prog)
--]]
--[[
settings, initial values
The values in the settings array have lowest priority - lower than
autodetect and command-line options. We go for false rather than
undefined, because this results in an actual settings entry.
We ignore illegal settings in the config file.
--]]
pdf_targets = {'screen', 'ebook', 'printer', 'prepress', 'default'}
pdf_versions = {'1.2', '1.3', '1.4', 'default'}
settings = {}
descriptions = {}
settings.pdf_target = 'default'
descriptions.pdf_target = 'One of ' .. join(pdf_targets, ', ', ' or ')
settings.pdf_version = 'default'
descriptions.pdf_version = 'One of ' .. join(pdf_versions, ', ', ' or ')
--[[
-- is bb_spread still a useful setting?
-- look at gs options wrt boundingbox
-- settings.bb_spread = 1
-- descriptions.bb_spread = 'Safety margin in points for (low-res) boundingbox'
settings.use_hires_bb = false
-- descriptions.use_hires_bb = 'Use high-resolution boundingbox if available'
-- Ignored; hires bb always used
--]]
-- because pdftops_prog is sometimes configurable, it is stored in settings.
-- it will not be used for TeX Live and only be read and written on Windows.
settings.pdftops_prog = false
descriptions.pdftops_prog =
'Full path to pdftops.exe (not used if TeX bin dir contains pdftops)'
settings.use_pdftops = true
descriptions.use_pdftops = 'Use pdftops if available'
-- epspdf stores ps- and pdf viewer settings on behalf of the gui interface
-- but does not use them itself.
-- They won't be used at all under osx or windows.
settings.ps_viewer = false
descriptions.ps_viewer =
'Epspdftk: viewer for PostScript files; not used on Windows or OS X'
settings.pdf_viewer = false
descriptions.pdf_viewer =
'Epspdftk: viewer for pdf files; not used on Windows or OS X'
-- default_dir, which is used on all platforms, is only for the gui.
if os.type == 'windows' then
settings.default_dir =
string.gsub(ep_shortname(os.getenv('USERPROFILE')), '\\', '/')
else
settings.default_dir = os.getenv('HOME')
end
descriptions.default_dir =
'Epspdftk: initial directory; ignored by epspdf itself'
-- options -------------------------------------
-- besides settings, which can be saved, we also use options which are not.
-- these are mostly conversion options.
options = {}
options.page = false
options.gray = false
options.bbox = false
options.debug = false
options.type = false -- implied via output filename on command line
-- command-line fragments for conversions --------------------
-- We could make these `class attributes' for PsPdf but to what purpose?
-- For Windows shell commands, we need to substitute `#' for `='
-- when invoking Ghostscript. For simplicity, we do this across the board.
gs_options = {'-q', '-dNOPAUSE', '-dBATCH', '-P-', '-dSAFER'}
-- may add custom options later
pdf_options = {'-sDEVICE#pdfwrite'} -- '-dUseCIEColor' causes serious slowdown
-- options for final conversion to pdf;
-- will be completed after reading settings and options
pdf_tail_options = {'-c', '.setpdfwrite', '-f'}
gray_options = {'-dProcessColorModel#/DeviceGray',
'-sColorConversionStrategy#Gray'}
pdftops = false
-- gets a value only if we are going to use pdftops
ps_options = {'-level3'}
-- may add custom options later
-- `main program' inside scope-creating block ----------------------
do -- main program
local infile = false
local in_dir = false -- directory of infile
local outfile = false
local out_dir = false -- directory of outfile
-- dbg('\nSettings are:\n')
for k,v in pairs(settings) do dbg(k .. ' = ' .. tostring(v)) end
do -- Handle settings and command-line inside nested scope --------------
read_settings(rcfile)
-- dbg('Defining cmdline options')
local opts = {}
opts.page = {
type = 'string', val = nil,
forms = {'-p', '--page', '--pagenumber'},
placeholder = 'PNUM',
negforms = nil,
help = 'Page number; must be a positive integer'
}
opts.gray = {
type = 'boolean', val = nil,
forms = {'-g', '--grey', '--gray', '-G', '--GREY', '--GRAY'},
negforms = nil,
help = 'Convert to grayscale'
}
opts.bbox = {
type = 'boolean', val = nil,
forms = {'-b', '--bbox', '--BoundingBox'},
negforms = nil,
help = 'Compute tight boundingbox'
}
---[[ ignored; included for backward compatibility
opts.use_hires_bb = {
type = 'boolean', val = nil,
forms = {'-r', '--hires'},
negforms = {'-n', '--no-hires'},
}
opts.custom = {
type = 'string', val = nil,
forms = {'-C', '--custom', '-P', '--psoptions'},
negforms = nil
}
--]]
opts.pdf_target = {
type = 'string', val = nil,
forms = {'-T', '--target'},
placeholder = 'TARGET',
negforms = nil,
help = descriptions.pdf_target
}
opts.pdf_version = {
type = 'string', val = nil,
forms = {'-N', '--pdfversion'},
placeholder = 'VERSION',
negforms = nil,
help = descriptions.pdf_version
}
if os.type=='windows' and not auto_psp then
opts.pdftops_prog = {
type = 'string', val = nil,
forms = {'--pdftops'},
placeholder = 'PATH',
negforms = nil,
help = descriptions.pdftops_prog
}
end
opts.use_pdftops = {
type = 'boolean', val = nil,
forms = {'-U'},
negforms = {'-I'},
help = descriptions.use_pdftops
}
opts.info = {
type = 'boolean', val = nil,
forms = {'-i', '--info'},
negforms = nil,
help = 'Info: display detected filetype and exit'
}
opts.help = {
type = 'boolean', val = nil,
forms = {'-h', '--help'},
negforms = nil,
help = 'Display this help message and exit'
}
opts.version = {
type = 'boolean', val = nil,
forms = {'-v', '--version'},
negforms = nil,
help = 'Display version info and exit'
}
opts.save = {
type = 'boolean', val = nil,
forms = {'-s', '--save'},
negforms = nil,
help = 'Save some settings to configuration file'
}
opts.debug = {
type = 'boolean', val = nil,
forms = {'-d'},
negforms = nil,
help = 'Debug: do not remove temp files'
}
opts.gui = {
type = 'string', val = nil,
forms = {'--gui'},
negforms = nil,
help = nil -- reserved for use by epspdftk
}
-- a couple of functions only available during command-line parsing
local function show_version ()
print('Epspdf version '..ep_version..'\nCopyright (c) '
..ep_copyright..' Siep Kroonenberg')
end
local function help (mess) -- requires opts array
if mess then print(mess..eol) end
show_version()
-- below, string.gsub unindents its long-string parameter.
-- string.format removes the second return value of string.gsub.
print(string.format('%s', string.gsub([[
Convert between [e]ps and pdf formats
Usage: epspdf[.tlu] [options] infile [outfile]
Default for outfile is file.pdf if infile is file.eps or file.ps
Default for outfile is file.eps if infile is file.pdf
]], '([\r\n]+) ', '%1')))
-- need to enforce an ordering, otherwise we could have used pairs(opts)
-- omitted below: no-op options
-- one line where possible
local indent_n = 12
local intent_sp = string.rep(' ', indent_n)
local indent_fmt = '%-' .. tostring(indent_n) .. 's'
for _, o in ipairs({'page', 'gray', 'bbox', 'pdf_target', 'pdf_version',
'pdftops_prog', 'use_pdftops', 'save', 'info', 'debug',
'version', 'help'}) do
local v = opts[o]
if v~='pdftops_prog' or not auto_psp then
if v and v.help then
local synt = join(v.forms, ', ')
if v.type ~= 'boolean' then synt = synt .. ' ' .. v.placeholder end
if string.len(synt)<indent_n then
print(string.format(indent_fmt, synt) .. v.help)
else
print(synt)
print(intent_sp .. v.help)
end
if v.negforms then
local neghelp = 'Reverses the above'
synt = join(v.negforms, ', ')
if string.len(synt)<indent_n then
print(string.format(indent_fmt, synt) .. neghelp)
else
print(synt)
print(intent_sp .. neghelp)
end
end
end
end -- ~=pdftops_prog or not auto_psp
end -- for
if mess then os.exit(1) else os.exit() end
end -- help
if #arg < 1 then help('No parameters') end
-- command-line parsing
-- -r="tata tata" is parsed by [tex]lua as a single argument
-- lua/linux retains the quotes,
-- lua/windows strips them.
-- texlua strips them, both on unix and on windows.
local i=1
while i<=#arg and string.sub(arg[i],1,1)=='-' do
-- dbg('parse argument '..tostring(i)..': '..arg[i])
local parsed = false
local kk, vv = string.match(arg[i],'([^=]+)=(.*)$')
if kk==nil then
kk = arg[i] -- also vv==nil
else
vv = strip_outer_spaces(vv)
end
for p, o in pairs(opts) do
-- dbg(' try '..p)
if in_list(kk, o.forms) or in_list(kk, o.negforms) then
parsed = true
if o.type == 'boolean' then
if vv then help(kk..' should not have a parameter.') end
if in_list(kk, o.forms) then
o.val = true
else
o.val = false
end
elseif vv then
o.val = vv
else
i = i + 1
if i>#arg then
help('Missing parameter to '..kk)
end
o.val = strip_outer_spaces(arg[i])
end -- testing for o.type or vv
break -- for
end -- if in_list
end -- for
if not parsed then help('illegal parameter '..kk) end
i = i + 1
end -- while
-- some debug output
--[[
if i<=#arg then
dbg('non-option arguments:')
for j=i,#arg do dbg(arg[j]) end
dbg(eol)
else
dbg('no non-option arguments')
end
for i=1,#arg do dbg(arg[i]) end
dbg(eol..'Options from command-line:')
for p, o in pairs(opts) do
if o.val==nil then
dbg(p..': undefined')
else
dbg(p..': '..tostring(o.val))
end
end
--]]
-- check and interpret opts.
-- Copy to either settings or to options table.
-- at syntax error, abort via help function.
-- page
if opts.page.val then
local pnum = tonumber(opts.page.val)
if pnum<=0 or math.floor(pnum) ~= pnum then
help(opts.page.val..' not a positive integer')
else
options.page = pnum
end
end
-- grayscaling
if opts.gray.val then
options.gray = true
else
options.gray = false
end
-- boundingbox
if opts.bbox.val then
options.bbox = true
else
options.bbox = false
end
--[[
-- using hires boundingbox
if opts.use_hires_bb.val~=nil then
settings.use_hires_bb = opts.use_hires_bb.val
end
--]]
-- using pdftops
if opts.use_pdftops.val~=nil then
settings.use_pdftops = opts.use_pdftops.val
end
-- pdf target use
if opts.pdf_target.val~=nil then
if in_list(opts.pdf_target.val, pdf_targets) then
settings.pdf_target = opts.pdf_target.val
else
help('Illegal value '..opts.pdf_target.val..' for pdf_target')
end
end
-- pdf version
if opts.pdf_version.val~=nil then
if in_list(opts.pdf_version.val, pdf_versions) then
settings.pdf_version = opts.pdf_version.val
else
help('Illegal value '..opts.pdf_version.val..' for pdf_version')
end
end
-- pdftops program; pdftops has already been been initialized to false
-- pdftops_prog as command-line option
if os.type=='windows' and not auto_psp and
opts.pdftops_prog.val then
settings.pdftops_prog = is_prog(opts.pdftops_prog.val)
end
-- pdftops should be on the path. otherwise, make it so if possible.
if os.type=='windows' and not auto_psp then
if settings.use_pdftops then
pdftops = is_prog(settings.pdftops_prog)
if pdftops then
-- strip path and modify searchpath, to avoid paths with spaces
maybe_add_path(string.gsub(pdftops, '[\\/][^\\/]*$', ''), 'append')
pdftops = string.gsub(settings.pdftops_prog, '^.*[\\/]', '')
end
end
elseif os.type=='windows' then
if settings.use_pdftops then
pdftops = 'pdftops.exe'
end
else
if settings.use_pdftops then
pdftops = find_on_path('pdftops')
end
end
-- dbg('Option handling; pdftops is '..tostring(pdftops))
-- other options
if opts.save.val then
write_settings(rcfile)
end
if opts.debug.val then
options.debug = true
end
if opts.help.val then
help()
end
-- opts.info.val: do later; need to get infile first
if opts.version.val then
show_version()
os.exit()
end
if opts.gui.val then
gui(opts.gui.val)
end
-- now we need 1 or 2 filenames, unless the user really only
-- wanted to save options without further action.
if i>#arg then
if opts.save.val then os.exit() else help('No filenames') end
end
infile = arg[i]
outfile = false
if i<#arg then
outfile = arg[i+1]
end
if (#arg>i and opts.info.val) or (#arg>i+1) then
help('Surplus non-option parameters')
end
if not outfile and not opts.info.val then
-- derive outfile from infile: [e]ps => pdf, pdf => eps
if intype=='pdf' then
outfile = string.gsub(infile,'%.[^%.]*$','eps')
else
outfile = string.gsub(infile,'%.[^%.]*$','.pdf')
end
end
-- one final quick option
if opts.info.val then
info(infile)
end
-- add pdf_version and pdf_target to the options array,
-- from where it will be set to false when realized
if settings.pdf_target == 'default' then
options.pdf_target = false
else
options.pdf_target = settings.pdf_target
end
if settings.pdf_version == 'default' then
options.pdf_version = false
else
options.pdf_version = tonumber(settings.pdf_version)
end
end -- decoding command-line
--[[
dbg('After command-line processing\n Settings')
-- print settings- and options array with dbg
for k, v in pairs(settings) do
dbg(k..': '..tostring(v))
end
dbg(' Options')
for k, v in pairs(options) do
dbg(k..': '..tostring(v))
end
--]]
--[[
Once it becomes clear that real work needs to be done,
we shall create a temp directory.
because of gs -dSAFER restrictions, infile must be in (a
subdirectory of) the directory of the output file, e.g. in the
temp directory.
Also because of -dSAFER, we copy infile to the temp directory of
it is not in the same directory as outfile.
--]]
source = io.open(infile)
if not source then
error(infile .. ' not readable')
end
source:close()
-- if options.debug then
-- warn('in: '..infile..'\nout: '..outfile..'\n\ncwd: '..cwd)
-- end
infile, in_dir = absolute_path(infile)
outfile, out_dir = absolute_path(outfile)
if not out_dir then
errror('Invalid output directory for '.. outfile)
end
-- directory for temporary files
-- previously, we used a subdirectory of the target directory.
-- however, since under windows cleanup may fail, we now try to use
-- a directory under a dedicated temp directory, which has a better chance
-- of getting cleaned up by the system.
lfs.chdir(system_tempdir() or out_dir)
-- no check for failure; we create a subdirectory in
-- whatever is the current directory
tempdir = os.tmpdir()
if not tempdir then
errror('Cannot create directory for temporary files')
else
-- dbg('temp directory '..tempdir)
end
lfs.chdir(tempdir)
intype = identify(infile)
-- remaining cases: want a real conversion
if not intype then
error(infile..' has an unsupported filetype')
end
--sanity check on output filetype
options.type = string.match(outfile, '.*%.([^%.]+)$')
if not options.type or (options.type~='ps'
and options.type~='eps' and options.type~='pdf') then
errror('Output file '..outfile..
' should have extension .eps, .ps or .pdf')
end
if outfile==infile then
local insave = infile .. '.luasave'
move_or_copy(infile, insave)
infile = insave
end
-- had some trouble under msw when removing outfile later so try it now
if lfs.isfile(outfile) then
os.remove(outfile)
-- if removal fails but outfile is overwritable then no real problem
end
local fout = io.open(outfile, 'wb')
if not fout then
errror('Output file '..outfile..' not writable; aborting')
else
fout:close()
end
source = PsPdf:from_path(infile)
dest = source:any_to_any()
if not lfs.isfile(dest.path) then
errror('Failed to generate '..dest.path)
end
write_log('Copying or moving '..dest.path..' to '..outfile)
move_or_copy(dest.path, outfile)
if not options.debug then
cleantemp()
end
if lfs.isfile(outfile) and lfs.attributes(outfile, 'size')>0 then
os.exit()
else
errror('Conversion failed')
end
end
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