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#!/usr/bin/env python
# Copyright (C) 2011: Simeon Voelkel <simeon_voelkel@arcor.de>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# 2. The name of the author may not be used to endorse or promote
# products derived from this software without specific prior written
# permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
# IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
import Image
import sys
from optparse import OptionParser
#import optparse
epsprolog_text="""%%Creator: duotoner.py
%%LanguageLevel: 3
%%DocumentProcessColors: Black
"""
HKS43K_text="""%%DocumentCustomColors:
%%+ (HKS 43 K)
%%CMYKCustomColor:
%%+ 0.94902 0.8 0 0 (HKS 43 K)
"""
HKS15K_text="""%%DocumentCustomColors:
%%+ (HKS 15 K)
%%CMYKCustomColor:
%%+ 0.05 1.0 0.8 0 (HKS 15 K)
"""
PANTONE_RED_032_U_text="""%%DocumentCustomColors:
%%+ (PANTONE Red 032 U)
%%CMYKCustomColor:
%%+ 0 0.83 0.76 0.07 (PANTONE Red 032 U)
"""
PANTONE_RED_032_U_colorspace="""
[ /DeviceN
[ (PANTONE Red 032 U) /Black ]
/DeviceCMYK
{
exch
dup 0.0 mul exch
dup 0.83 mul exch
dup 0.76 mul exch
0.07 mul
5 -1 roll
add
}
] setcolorspace
"""
HKS43K_colorspace="""
[ /DeviceN
[ (HKS 43 K) /Black ]
/DeviceCMYK
{
exch
dup 0.94902 mul exch
dup 0.8 mul exch
dup 0.0 mul exch
0.0 mul
5 -1 roll
add
}
] setcolorspace
"""
HKS15K_colorspace="""
[ /DeviceN
[ (HKS 15 K) /Black ]
/DeviceCMYK
{
exch
dup 0.05 mul exch
dup 1.0 mul exch
dup 0.8 mul exch
0.0 mul
5 -1 roll
add
}
] setcolorspace
"""
def epsprolog(ofile, width, height):
ofile.write( '%!PS-Adobe-3.0 EPSF-3.0\n' )
# one point (1/72 inch, unit of coord.sys) contains 25/6 dots at 300 dpi:
ofile.write( '%%BoundingBox: 0 0 {0:f} {1:f}\n'.format((width*6)/25+1, ((height+1)*6)/25+1) )
ofile.write( '%%HiResBoundingBox: 0 0 {0:f} {1:f}\n'.format((width*6.0)/25.0, ((height+1)*6.0)/25.0) )
ofile.write( epsprolog_text )
ofile.write( PANTONE_RED_032_U_text )
ofile.write( '%%EndComments\n' )
ofile.write( PANTONE_RED_032_U_colorspace )
ofile.write( '0 0 translate\n' )
ofile.write( '{0:f} {1:f} scale\n'.format((width*6.0)/25.0, (height*6.0)/25.0) )
ofile.write( '<<\n' )
ofile.write( ' /ImageType 1\n' )
ofile.write( ' /Width {0:d}\n'.format(width) )
ofile.write( ' /Height {0:d}\n'.format(height) )
ofile.write( ' /BitsPerComponent 8\n' )
ofile.write( ' /Decode [ 1 0 1 0 ]\n' )
ofile.write( ' /ImageMatrix [ {0:d} 0 0 -{1:d} 0 {1:d} ]\n'.format(width,height) )
ofile.write( ' /DataSource currentfile /ASCIIHexDecode filter \n' )
ofile.write( '>>\n' )
ofile.write( 'image\n' )
def heximageoutput(ofile,bpixel,spixel,width,height):
for y in range(height) :
linelength = 16;
for x in range(width) :
ofile.write( '{0:02X}'.format(spixel[x,y]) )
ofile.write( '{0:02X}'.format(bpixel[x,y]) )
linelength -= 1;
if linelength == 0 :
ofile.write( '\n' )
linelength = 16
ofile.write( '\n>\n' )
def epsepilog(ofile):
ofile.write( '\n' )
ofile.write( 'showpage\n' )
ofile.write( '%%EOF\n' )
def do_duotone(grayimage, spotimage, epsout):
imblack = Image.open(grayimage)
imspot = Image.open(spotimage)
bpixel = imblack.load()
spixel = imspot.load()
bwidth = imblack.size[0]
swidth = imspot.size[0]
bheight = imblack.size[1]
sheight = imspot.size[1]
bmode = imblack.mode
smode = imspot.mode
if bmode != 'L' :
print('Grayscale(L) image required, but received {0:s} for black ink'.format(bmode))
exit (-1)
if smode != 'L' :
print('Grayscale(L) image required, but received {0:s} for spot color'.format(smode))
exit (-2)
if bwidth != swidth or bheight != sheight :
print('Image dimensions do not match!: Black: {0:d}x{1:d} vs. Spot: {2:d}x{3:d}'.format(bwidth,bheight,swidth,sheight))
exit (-3)
print('Image dimensions are: Black: {0:d}x{1:d} vs. Spot: {2:d}x{3:d}'.format(bwidth,bheight,swidth,sheight))
ofile = open(epsout, 'wb')
epsprolog(ofile,bwidth,bheight)
heximageoutput(ofile,bpixel,spixel,bwidth,bheight)
epsepilog(ofile)
def process_args():
parser = OptionParser()
parser.add_option("-b", "--black",
action="store", type="string", dest="grayinfilename", default="/dev/stdin",
help="image for black ink")
parser.add_option("-s", "--spot",
action="store", type="string", dest="spotinfilename", default="/dev/stdin",
help="image for spot color")
parser.add_option("-o", "--output",
action="store", type="string", dest="epsoutfilename", default="/dev/stdout",
help="epsfile for output")
(options, args) = parser.parse_args()
do_duotone(options.grayinfilename, options.spotinfilename, options.epsoutfilename)
if __name__ == "__main__":
process_args()