#!/usr/bin/env python
# -*- Mode: python -*-

#    Copyright (C) 2001-2006 Artifex Software Inc.
#    All Rights Reserved.
#
# This software is provided AS-IS with no warranty, either express or
# implied.
#
# This software is distributed under license and may not be copied, modified
# or distributed except as expressly authorized under the terms of that
# license.  Refer to licensing information at http://www.artifex.com/
# or contact Artifex Software, Inc.,  7 Mt. Lassen Drive - Suite A-134,
# San Rafael, CA  94903, U.S.A., +1(415)492-9861, for further information.

# $Id$

#
# make_two_versions <filename> [<device> [<res>]]
#
# this script creates two versions of the file specified
# one from baseline, and one from head
# these are appropriate for a visual diff

import gstestgs
import gsconf
import rasterdb
import os, sys
import string

def make_version(ifile, ofile, device, dpi, baseline=0):
    gs = gstestgs.Ghostscript()
    gs.log_stdout = gsconf.log_stdout
    gs.log_stderr = gsconf.log_stderr

    if baseline:
	gs.command = gsconf.baselinegs
    else:
	gs.command = gsconf.comparegs

    gs.infile = gsconf.comparefiledir + ifile
    gs.dpi = dpi
    gs.band = 0

    # make file->PDF

    tfile = ofile + ".pdf"
    gs.outfile = tfile
    gs.device = 'pdfwrite'

    if not gs.process():
        print "error creating pdf."
        return

    gs.infile = tfile
    gs.outfile = ofile
    gs.device = device

    if not gs.process():
        print "error rasterizing pdf."
    os.unlink(tfile)

if len(sys.argv) < 2:
    print "\n    usage: make_two_pdfversions filename [ device:ppmraw [ res:72 ] ]\n"
    sys.exit()

file = os.path.basename(sys.argv[1])
if len(sys.argv) > 2:
    device = sys.argv[2]
else:
    device = 'ppmraw'
if len(sys.argv) > 3:
    res = int(sys.argv[3])
else:
    res = 72

dbfile = "%s.pdf.%s.%d.%d" % (file, device, res, 0)
ofile = "%s.pdf.%s.baseline.pnm" % (file, device)

# check for cached raster and use that if it exists
if rasterdb.exists(dbfile):
    rasterdb.get_file(dbfile, output=ofile)
else:
    make_version(file, ofile, device, res, baseline=1)

ofile = "%s.pdf.%s.compare.pnm" % (file, device)

make_version(file, ofile, device, res, baseline=0)
