Created
September 19, 2013 07:49
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Parses Adobe swatch exchange files (color palettes).
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#!/usr/bin/env python | |
# coding: utf-8 | |
# Based on SwatchBooker code. Original license follows | |
# | |
# Copyright 2008 Olivier Berten <[email protected]> | |
# | |
# This program is free software; you can redistribute it and/or modify | |
# it under the terms of the GNU General Public License as published by | |
# the Free Software Foundation; either version 3 of the License, or | |
# (at your option) any later version. | |
# | |
# This program is distributed in the hope that it will be useful, | |
# but WITHOUT ANY WARRANTY; without even the implied warranty of | |
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
# GNU General Public License for more details. | |
# | |
# You should have received a copy of the GNU General Public License | |
# along with this program; if not, write to the Free Software | |
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, | |
# MA 02110-1301, USA. | |
# | |
import sys | |
import struct | |
class ase_reader( object): | |
def __init__( self, callbacks): | |
self._cb = callbacks | |
def read( self, file): | |
data = file.read(4) | |
if struct.unpack( '4s', data)[0] != 'ASEF': | |
self._cb.bad_header_id() | |
return | |
version = struct.unpack( '>2H',file.read(4)) | |
self._cb.set_version( version) | |
nbblocks = struct.unpack( '>L',file.read(4))[0] | |
self._cb.set_num_blocks( nbblocks) | |
for i in range( nbblocks): | |
name = False | |
block_type, block_size = struct.unpack( '>HL',file.read(6)) | |
if block_size > 0: | |
length = struct.unpack( '>H',file.read(2))[0] | |
if length > 0: | |
name = unicode( struct.unpack( str( length * 2) + 's', file.read( length * 2))[0], 'utf_16_be').split( '\x00', 1)[0] | |
if block_type == 0xc001: | |
self._cb.begin_group( name) | |
elif block_type == 0xc002: | |
self._cb.end_group() | |
elif block_type == 0x0001: | |
model = struct.unpack('4s',file.read(4))[0] | |
color = { 'name': name} | |
if model == "CMYK": | |
color['value'] = list( struct.unpack( '>4f', file.read(16))) | |
color['model'] = model | |
elif model == "RGB ": | |
color['value'] = list(struct.unpack( '>3f',file.read(12))) | |
color['model'] = 'RGB' | |
elif model == "LAB ": | |
L,a,b = struct.unpack( '>3f',file.read(12)) | |
color['value'] = [L*100,a,b] | |
color['model'] = 'LAB' | |
elif model == "Gray": | |
color['value'] = [1-struct.unpack( '>f',file.read(4))[0],] | |
color['model'] = 'Gray' | |
type = struct.unpack( '>H',file.read(2))[0] | |
''' | |
if type == 0: | |
color['usage'] = 'global' | |
elif type == 1: | |
color['usage'] = 'spot' | |
''' | |
self._cb.add_color( color) | |
if __name__ == "__main__": | |
class ase_reader_callbacks( object): | |
def bad_header_id( self): | |
print "bad header" | |
def set_version( self, version): | |
print "version = ", version | |
def set_num_blocks( self, nblocks): | |
print "nblocks = ", nblocks | |
def begin_group( self, name): | |
print "group ", name | |
def end_group( self): | |
print "group end" | |
def add_color( self, col): | |
print col['name'], col['value'] | |
f = open( "ps_swatches.ase", "rb") | |
cb = ase_reader_callbacks() | |
r = ase_reader( cb) | |
r.read( f) |
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