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stitchcode.py
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stitchcode.py
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#!/usr/bin/env python
# ------------------------------------------------------------------
# stitchcode - a simple Embroidery class for python
# ------------------------------------------------------------------
# Copyright (C) 2013-2015 Michael Aschauer
# ------------------------------------------------------------------
# originaly derived and forked from PyEmb.py
# see: http://www.achatina.de/sewing/main/TECHNICL.HTM
# ------------------------------------------------------------------
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Library General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library 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
# Library General Public License for more details.
#
# You should have received a copy of the GNU Library General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
import math
import sys
from struct import unpack,pack
from PIL import Image, ImageDraw
dbg = sys.stderr
pixels_per_millimeter = 5
max_stitch_len = 121 # at least for DST files, EXP allows 127
density_max = 15
def abs(x):
if (x<0): return -x
return x
############################################
#### POINT CLASS
############################################
class Point:
def __init__(self, x, y, jump=False, color=0):
self.x = x
self.y = y
self.color = 0
self.jump = jump
def __add__(self, other):
return Point(self.x+other.x, self.y+other.y)
def __sub__(self, other):
return Point(self.x-other.x, self.y-other.y)
def mul(self, scalar):
return Point(self.x*scalar, self.y*scalar)
def __repr__(self):
return "Pt(%s,%s,%s)" % (self.x, self.y, self.jump)
def length(self):
return math.sqrt(math.pow(self.x, 2.0) + math.pow(self.y, 2.0))
def as_int(self):
return Point(int(round(self.x)), int(round(self.y)))
def as_tuple(self):
return (self.x, self.y)
def __cmp__(self, other):
return cmp(self.as_tuple(), other.as_tuple())
def toString(self):
return "%dx%d" % (self.x, self.y)
############################################
#### MAIN EMBROIDERY CLASS
############################################
class Embroidery:
def __init__(self):
self.coords = []
self.clamp = max_stitch_len
self.minx = 0
self.maxx = 0
self.miny = 0
self.maxy = 0
self.tooLong = 0
self.densityWarning = False
self.density = dict()
def setMaxStitchLength(self, clamp=max_stitch_len):
self.clamp = clamp
def addStitch(self, coord):
self.coords.append(coord)
# calculate density on given points
if self.density.has_key(coord.toString()):
self.density[coord.toString()] += 1
if self.density[coord.toString()] > density_max:
self.densityWarning = True
else:
self.density[coord.toString()] = 1
# calculate length warnings:
if len(self.coords) > 1:
delta = coord - self.coords[-2]
dmax = max(abs(delta.x), abs(delta.y))
if dmax > max_stitch_len:
self.tooLong += 1
def getSize(self):
(self.maxx, self.maxy) = (self.coords[0].x, self.coords[0].y)
(self.minx, self.miny) = (self.coords[0].x, self.coords[0].y)
for p in self.coords:
self.minx = min(self.minx, p.x)
self.miny = min(self.miny, p.y)
self.maxx = max(self.maxx, p.x)
self.maxy = max(self.maxy, p.y)
sx = int( self.maxx - self.minx )
sy = int( self.maxy - self.miny )
return (sx,sy)
def getMetricWidth(self):
sx,sy = self.getSize()
return sx / 10.0
def getMetricHeight(self):
sx,sy = self.getSize()
return sy / 10.0
def info(self):
info_str = "";
info_str = "stitchcount: %d\n" % (len(self.coords))
info_str = info_str + "size: %0.2f x %0.2f mm\n" % (self.getMetricWidth(), self.getMetricHeight())
if self.densityWarning:
info_str += "DENSITY WARNING!\n"
return info_str
def translate_to_origin(self):
"""translates embroidery to origin
Args: none
"""
(self.minx, self.maxx) = (self.coords[0].x, self.coords[0].x)
(self.miny, self.maxy) = (self.coords[0].y, self.coords[0].y)
if (len(self.coords)==0):
return
for p in self.coords:
self.minx = min(self.minx, p.x)
self.miny = min(self.miny, p.y)
self.maxx = max(self.maxx, p.x)
self.maxy = max(self.maxy, p.y)
sx = self.maxx - self.minx
sy = self.maxy - self.miny
for p in self.coords:
p.x -= self.minx
p.y -= self.miny
dbg.write("translated to origin. resulting field size: %0.2fmm x %0.2fmm\n" % (sx/10, sy/10))
def scale(self, factor):
"""scales embroidery design
Args:
factor: multiplication factor (1 means no scaling)
"""
dbg.write("scale to %d%%\n" % (factor * 100))
for p in self.coords:
p.x *= factor
p.y *= factor
def add_endstitches(self, length=10, max_stitch_length=max_stitch_len):
"""adds endstitches before and after stitches that are too long
Args:
length: length of end stitches (default = 10)
max_stitch_length: max. length for stitches (default = max_stitch_len = 121)
"""
dbg.write("add endstitches BEGIN - stitch count: %d\n" % len(self.coords))
self.pos = self.coords[0]
new_coords = []
new_coords.append(self.coords[0])
for stitch in self.coords[1:]:
new_int = stitch.as_int()
old_int = self.pos.as_int()
delta = new_int - old_int
dmax = max(abs(delta.x), abs(delta.y))
if dmax <= max_stitch_length:
new_coords.append(stitch)
else:
x2 = length * delta.x / delta.length()
y2 = length * delta.y / delta.length()
new_coords.append(Point(old_int.x+x2, old_int.y+y2))
new_coords.append(self.pos)
new_coords.append(stitch)
new_coords.append(Point(new_int.x-x2, new_int.y-y2))
new_coords.append(stitch)
self.pos = stitch
self.coords = new_coords
dbg.write("add endstitches END - stitch count: %d\n" % len(self.coords))
def add_endstitches_to_jumps(self, length=10):
"""adds endstitches before and after jumps.
Args:
length: length of end stitches (default = 10)
"""
dbg.write("add endstitches BEGIN - stitch count: %d\n" % len(self.coords))
self.pos = self.coords[0]
new_coords = []
new_coords.append(self.pos)
for j in range(1, len(self.coords)):
stitch = self.coords[j]
if stitch.jump == True:
if j > 2:
l1_int = self.coords[j-1].as_int()
l2_int = self.coords[j-2].as_int()
delta = l1_int - l2_int
if delta.length() != 0:
dx = length * delta.x / delta.length()
dy = length * delta.y / delta.length()
new_coords.append(Point(l1_int.x - dx, l1_int.y - dy))
new_coords.append(self.coords[j-1])
new_coords.append(stitch)
#and after jump
if j+1 < len(self.coords):
l3_int = self.coords[j].as_int()
l4_int = self.coords[j+1].as_int()
delta = l4_int - l3_int
if delta.length() != 0:
dx = length * delta.x / delta.length()
dy = length * delta.y / delta.length()
new_coords.append(Point(l3_int.x + dx, l3_int.y + dy))
new_coords.append(Point(l3_int.x, l3_int.y))
else:
new_coords.append(stitch)
self.pos = stitch
self.coords = new_coords
dbg.write("add endstitches END - stitch count: %d\n" % len(self.coords))
def to_triple_stitches(self, length=2):
"""convert desgin to triple stitches
Args:
length: length/offset of triple (default = 2)
"""
dbg.write("to_triple_stitches BEGIN - stitch count: %d\n" % len(self.coords))
self.pos = self.coords[0]
new_coords = []
new_coords.append(self.coords[0])
for stitch in self.coords[1:]:
if not stitch.jump:
new_stitch = stitch.as_int()
last_stitch = self.pos.as_int()
delta = new_stitch - last_stitch
if delta.length() != 0:
nx = length * -delta.y / delta.length()
ny = length * delta.x / delta.length()
new_coords.append(Point(new_stitch.x - nx, new_stitch.y - ny))
new_coords.append(Point(last_stitch.x - nx, last_stitch.y - ny))
new_coords.append(stitch)
self.pos = stitch
self.coords = new_coords
dbg.write("to_triple_stitches END - stitch count: %d\n" % len(self.coords))
def to_red_work(self, length=3):
"""convert desgin to red work stitches
Args:
length: length/offset of triple (default = 3)
"""
dbg.write("to_triple_stitches BEGIN - stitch count: %d\n" % len(self.coords))
self.pos = self.coords[0]
new_coords = []
new_coords.append(self.coords[0])
for stitch in self.coords[1:]:
if not stitch.jump:
new_stitch = stitch.as_int()
last_stitch = self.pos.as_int()
delta = new_stitch - last_stitch
if delta.length() != 0:
nx = length * -delta.y / delta.length()
ny = length * delta.x / delta.length()
new_coords.append(Point(new_stitch.x - nx, new_stitch.y - ny))
new_coords.append(Point(last_stitch.x - nx, last_stitch.y - ny))
new_coords.append(Point(new_stitch.x + nx, new_stitch.y + ny))
new_coords.append(Point(last_stitch.x + nx, last_stitch.y + ny))
new_coords.append(stitch)
self.pos = stitch
self.coords = new_coords
dbg.write("to_triple_stitches END - stitch count: %d\n" % len(self.coords))
def flatten(self, max_length=max_stitch_len):
"""flatten file - interpolate stitches that are too long
Args:
max_length: maximum stitch length (default = 121 for dst, exp could do 127)
"""
dbg.write("flatten BEGIN - stitch count: %d\n" % len(self.coords))
self.pos = self.coords[0]
new_coords = []
## ignore first if its a jump
if not self.coords[0].jump:
new_coords.append(self.coords[0])
for stitch in self.coords[1:]:
new_stitch = stitch.as_int()
last_stitch = self.pos.as_int()
delta = new_stitch - last_stitch
if delta.length:
#do several interpolated steps if too long
dmax = max(abs(delta.x), abs(delta.y))
dsteps = abs(dmax / max_length) + 1
if dmax > max_length and not stitch.jump:
for i in range(0, dsteps):
x = last_stitch.x + (i+1) * delta.x/dsteps
y = last_stitch.y + (i+1) * delta.y/dsteps
new_coords.append(Point(x, y))
else:
new_coords.append(stitch)
self.pos = stitch
self.coords = new_coords
dbg.write("flatten END - stitch count: %d\n" % len(self.coords))
############################################
#### FILE IMPORT AND EXPORT
############################################
def save(self, filename):
"""save design as file - a wrapper that figures out which format
funtion to use by filename extension
Args:
filename
"""
ext = (filename[-3:]).lower()
if ext == "exp":
self.save_as_exp(filename)
elif ext == "png":
self.save_as_png(filename)
elif ext == "pes":
self.save_as_pes(filename)
elif ext == "svg":
self.save_as_svg(filename)
elif ext == "ksm":
self.save_as_ksm(filename)
elif ext == "dst":
self.save_as_dst(filename)
else:
dbg.write("error saving file: unknown file extension: %s\n" % (filename))
def load(self, filename):
"""import design from file - a wrapper that figures out which format
funtion to use by filename extension
Args:
filename
"""
ext = (filename[-3:]).lower()
if ext == "exp":
self.import_melco(filename)
if ext == "dst":
self.import_tajima(filename)
elif ext == "pes":
self.import_pes(filename)
elif ext == "svg":
self.import_svg(filename)
else:
dbg.write("error loading file: unknown input file extension: %s\n" % (filename))
############################################
#### PFAFF / KSM
############################################
def save_as_ksm(self, filename):
"""save design as KSM/Pfaff format formated file
Args:
filename
"""
f = open(filename, "wb")
f.write(self.export_ksm())
f.close()
dbg.write("saved to file: %s\n" % (filename))
def export_ksm(self):
"""converts design to KSM/Pfaff format - CURRENTLY UNTESTED
Returns:
string (KSM/Pfaff)
"""
self.string = ""
self.mode_byte = 0x80
#write empty header
for i in range(0, 512):
self.string += chr(0x00)
def move(x,y):
self.string+=chr(abs(y))
self.string+=chr(abs(x))
if (y<0):
self.mode_byte |= 0x20
if (x<0):
self.mode_byte |= 0x40
self.string+=chr(self.mode_byte)
self.pos = Point(0,0)
lastColor = None
for stitch in self.coords:
if (lastColor!=None and stitch.color!=lastColor):
self.mode_byte = 0x99
#dbg.write("Color change!\n")
else:
self.mode_byte = 0x80
#dbg.write("color still %s\n" % stitch.color)
lastColor = stitch.color
new_int = stitch.as_int()
old_int = self.pos.as_int()
delta = new_int - old_int
sum_x = 0
sum_y = 0
dmax = max(abs(delta.x), abs(delta.y))
dsteps = abs(dmax / 127) + 1
if dsteps == 1:
move(delta.x, delta.y)
else:
for i in range(0,dsteps):
if i < dsteps -1:
move(delta.x/dsteps, delta.y/dsteps)
sum_x += delta.x/dsteps
sum_y += delta.y/dsteps
else:
move(delta.x - sum_x, delta.y - sum_y)
self.pos = stitch
return self.string
############################################
#### MELCO / EXP
############################################
def save_as_exp(self, filename):
"""save design as EXP/Melco formated file
Args:
filename
"""
f = open(filename, "wb")
f.write(self.export_melco())
f.close()
dbg.write("saved to file: %s\n" % (filename))
def export_melco(self):
"""converts design to EXP/Melco format
Returns:
string (EXP/Melco)
"""
self.string = ""
self.pos = self.coords[0]
dbg.write("export - stitch count: %d\n" % len(self.coords))
for stitch in self.coords[0:]:
new_int = stitch.as_int()
old_int = self.pos.as_int()
delta = new_int - old_int
def move(x, y):
if (x<0): x = x + 256
self.string += chr(x)
if (y<0): y = y + 256
self.string += chr(y)
#do several interpolated steps if too long
#dbg.write("delta: %d, %d\n" % (delta.x,delta.y))
sum_x = 0
sum_y = 0
dmax = max(abs(delta.x), abs(delta.y))
dsteps = abs(dmax / 127) + 1
if dsteps == 1:
if stitch.jump:
self.string += chr(0x80)
self.string += chr(0x04)
#dbg.write("move: %d, %d\n" % (delta.x, delta.y))
move(delta.x, delta.y)
else:
for i in range(0,dsteps):
if stitch.jump:
self.string += chr(0x80)
self.string += chr(0x04)
if i < dsteps -1:
#dbg.write("move: %d, %d\n" % (delta.x/dsteps, delta.y/dsteps))
move(delta.x/dsteps, delta.y/dsteps)
sum_x += delta.x/dsteps
sum_y += delta.y/dsteps
else:
#dbg.write("move: %d, %d\n" % (delta.x - sum_x, delta.y - sum_y))
move(delta.x - sum_x, delta.y - sum_y)
self.pos = stitch
#dbg.write("sum: %d, %d\n" % (sum_x,sum_y))
return self.string
def import_melco(self, filename):
"""read an EXP/Melco file
Args:
filename
"""
# read in an EXP/Melco file
(lastx, lasty) = (0, 0)
(self.maxx, self.maxy) = (0, 0)
(self.minx, self.miny) = (0, 0)
# add Stitch at origin or not?
self.addStitch(Point(lastx, lasty, False))
jump = False
f = open(filename, "rb")
byte = " "
while byte:
byte = f.read(1)
if byte != "" and len(byte) > 0:
if byte == chr(0x80):
byte = f.read(1)
if byte == chr(0x04) or byte == chr(0x02) or byte == chr(0x00):
jump = True
elif byte == chr(0x01) or byte == chr(0x02):
dbg.write("reading EXP: ignore color change")
byte = f.read(1)
dx = ord(byte)
if dx > 127:
dx = dx - 256
byte = f.read(1)
if byte != "":
dy = ord(byte)
if dy > 127:
dy = dy - 256
lastx = lastx + dx
lasty = lasty + dy
if dx != 0 or dy != 0:
self.addStitch(Point(lastx, lasty, jump))
jump = False
f.close()
dbg.write("reading EXP: loaded from file: %s\n" % (filename))
dbg.write("reading EXP: number of stitches: %d\n" % len(self.coords))
self.translate_to_origin()
############################################
#### TAJIMA / DST
############################################
def save_as_dst(self, filename):
"""save design as DST/Tajima formated file
Args:
filename
"""
f = open(filename, "wb")
f.write(self.export_tajima())
f.close()
dbg.write("saved to file: %s\n" % (filename))
def DecodeTajimaStitch(self, b1, b2, b3):
x = 0
y = 0
if b1 & 0x01:
x += 1
if b1 & 0x02:
x -= 1
if b1 & 0x04:
x += 9
if b1 & 0x08:
x -= 9
if b1 & 0x80:
y += 1
if b1 & 0x40:
y -= 1
if b1 & 0x20:
y += 9
if b1 & 0x10:
y -= 9
if b2 & 0x01:
x += 3
if b2 & 0x02:
x -= 3
if b2 & 0x04:
x += 27
if b2 & 0x08:
x -= 27
if b2 & 0x80:
y += 3
if b2 & 0x40:
y -= 3
if b2 & 0x20:
y += 27
if b2 & 0x10:
y -= 27
if b3 & 0x04:
x += 81
if b3 & 0x08:
x -= 81
if b3 & 0x20:
y += 81
if b3 & 0x10:
y -= 81
# Color change
#if b3 & 0x80 and b3 & 0x40:
# self.ColorsRead += 1
# if self.ColorsRead > len(self.Colors):
# self.Colors.append( self.RandomColor() )
#
# self.ColorChanges.append( self.CurrentStitch )
# return [self.ColorsRead - 1, 0, self.COLOR]
# Jump stitch
if b3 & 0x80:
return (x, y, True)
else:
return (x, y, False)
def EncodeTajimaStitch(self, dx, dy, jump=False):
b1 = 0
b2 = 0
b3 = 0
if dx > 40:
b3 |= 0x04
dx -= 81
if dx < -40:
b3 |= 0x08
dx += 81
if dy > 40:
b3 |= 0x20
dy -= 81
if dy < -40:
b3 |= 0x10
dy += 81
if dx > 13:
b2 |= 0x04
dx -= 27
if dx < -13:
b2 |= 0x08
dx += 27
if dy > 13:
b2 |= 0x20
dy -= 27
if dy < -13:
b2 |= 0x10
dy += 27
if dx > 4:
b1 |= 0x04
dx -= 9
if dx < -4:
b1 |= 0x08
dx += 9
if dy > 4:
b1 |= 0x20
dy -= 9
if dy < -4:
b1 |= 0x10
dy += 9
if dx > 1:
b2 |= 0x01
dx -= 3
if dx < -1:
b2 |= 0x02
dx += 3
if dy > 1:
b2 |= 0x80
dy -= 3
if dy < -1:
b2 |= 0x40
dy += 3
if dx > 0:
b1 |= 0x01
dx -= 1
if dx < 0:
b1 |= 0x02
dx += 1
if dy > 0:
b1 |= 0x80
dy -= 1
if dy < 0:
b1 |= 0x40
dy += 1
s = chr(b1)
s += chr(b2)
if jump:
s += chr(b3 | 0x83)
else:
s += chr(b3 | 0x03)
return s
def export_tajima(self):
"""converts design to DST/Tajima format
Returns:
string (DST/Tajima )
"""
self.string = ""
self.pos = self.coords[0]
dbg.write("export - stitch count: %d\n" % len(self.coords))
def writeHeader(str, length, padWithSpace=False):
for i in range (0,length-2):
if i < len(str):
self.string += str[i];
else:
if padWithSpace:
self.string += chr(0x20)
else:
self.string += chr(0x00);
self.string += chr(0x0A);
self.string += chr(0x1A);
writeHeader("LA:turtlestitch", 20, True)
writeHeader("ST:%s" % (len(self.coords)), 11)
writeHeader("CO:1", 7)
writeHeader("+X:%s" % (self.maxx), 9)
writeHeader("-X:%s" % (self.minx), 9)
writeHeader("+Y:%s" % (self.maxy), 9)
writeHeader("-Y:%s" % (self.miny), 9)
writeHeader("AX:%s" % self.coords[len(self.coords)-1].as_int().x, 10)
writeHeader("AY:%s" % self.coords[len(self.coords)-1].as_int().x, 10)
writeHeader("MX:0", 10)
writeHeader("MY:0", 10)
writeHeader("PD:******", 10)
self.string += chr(0x1a);
self.string += chr(0x00);
self.string += chr(0x00);
self.string += chr(0x00);
#write empty header
for i in range(0, 384):
self.string += chr(0x00)
for stitch in self.coords[0:]:
new_int = stitch.as_int()
old_int = self.pos.as_int()
delta = new_int - old_int
#do several interpolated steps if too long
sum_x = 0
sum_y = 0
dmax = max(abs(delta.x), abs(delta.y))
dsteps = abs(dmax / 121) + 1
if dsteps == 1:
self.string += self.EncodeTajimaStitch(delta.x, delta.y, stitch.jump)
else:
for i in range(0,dsteps):
if i < dsteps -1:
self.string += self.EncodeTajimaStitch(delta.x/dsteps, delta.y/dsteps, stitch.jump, )
sum_x += delta.x/dsteps
sum_y += delta.y/dsteps
else:
self.string += self.EncodeTajimaStitch(delta.x - sum_x, delta.y - sum_y, stitch.jump)
self.pos = stitch
self.string += chr(0x00)
self.string += chr(0x00)
self.string += chr(0xF3)
return self.string
def import_tajima(self, filename):
"""read an EXP/Melco file
Args:
filename
"""
# TODO!!!
# read in an EXP/Melco file
(lastx, lasty) = (0, 0)
(self.maxx, self.maxy) = (0, 0)
(self.minx, self.miny) = (0, 0)
# add Stitch at origin or not?
#self.addStitch(Point(lastx, lasty, False))
jump = False
f = open(filename, "rb")
header = f.read(512)
while True:
rec = f.read(3)
# Bad record or end of file
if len(rec) < 3:
break
b1 = ord(rec[0])
b2 = ord(rec[1])
b3 = ord(rec[2])
# End of file
if b3 == 0xF3:
break
(dx, dy, jump) = self.DecodeTajimaStitch(b1, b2, b3)
lastx = lastx + dx
lasty = lasty + dy
self.addStitch(Point(lastx, lasty, jump))
f.close()
dbg.write("reading DST: loaded from file: %s\n" % (filename))
dbg.write("reading DST: number of stitches: %d\n" % len(self.coords))
self.translate_to_origin()
############################################
#### Brother / PES
############################################
def save_as_pes(self, filename):
"""converts stitches to EXP/Melco format
Returns:
string (EXP/Melco)
"""
dbg.write("Warning: PES export is still experimental!")
# PES has maximum value of 64 for stitch lengt p direction
self.flatten(max_length=63)
(self.minx, self.maxx) = (self.coords[0].x, self.coords[0].x)
(self.miny, self.maxy) = (self.coords[0].y, self.coords[0].y)
if (len(self.coords)==0):
return
for p in self.coords:
self.minx = min(self.minx, p.x)
self.miny = min(self.miny, p.y)
self.maxx = max(self.maxx, p.x)
self.maxy = max(self.maxy, p.y)
sx = self.maxx - self.minx
sy = self.maxy - self.miny
# helper functions
def writeInt32(f,i):
f.write(pack('<I', i))
def writeInt16(f,i):
f.write(pack('H', i))
def writeInt8(f,i):
f.write(pack('B', i))
self.pos = self.coords[0]
dbg.write("export - stitch count: %d\n" % len(self.coords))
f = open(filename,"w")
# PES Block v1
f.write("#PES0001")
writeInt32(f,0) # pecblock pointer
writeInt16(f,0) # a value of 1 here seems to indicate design data is over 100KB long, or 0 for less than 100KB
writeInt16(f,1)
writeInt16(f,1)
writeInt16(f,0xFFFF)
writeInt16(f,0)
# CEmbOne Block v1
writeInt16(f,7)
f.write("CEmbOne")
writeInt16(f,0) # min x?
writeInt16(f,0) # min y?
writeInt16(f,0) # max x?
writeInt16(f,0) # max y?
writeInt16(f,0) # min x?
writeInt16(f,0) # min y?
writeInt16(f,0) # max x?
writeInt16(f,0) # max y?
writeInt32(f,0)
writeInt32(f,0)
writeInt32(f,0)
writeInt32(f,0)
writeInt32(f,0)
writeInt32(f,0)
writeInt16(f,1)
writeInt16(f,0)
writeInt16(f,0)
writeInt16(f,0)
writeInt16(f,0)
writeInt16(f,0)
writeInt16(f,0)
writeInt16(f,0)
writeInt16(f,0)
writeInt16(f,0)
writeInt16(f,0)
writeInt16(f,0)
# CEmbOne Block v1
writeInt16(f,7)
f.write("CSewSeq")
#CSewSeg Stitch Data
writeInt32(f,0)
#PEC Code Block Stitch Data
pecstart = f.tell()
for i in range(0,550):
writeInt8(f,0)
f.seek(8)
writeInt32(f,pecstart)
f.seek(77)
writeInt16(f,sx) # width
writeInt16(f,sy) # height
f.seek(pecstart+49)
writeInt8(f,0) # num colors
f.seek(pecstart+532)