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printing typewriterlike

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master
Your Name 6 years ago
parent bfd242ca87
commit c9df38d226
2 changed files with 162 additions and 99 deletions
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157
print.py
Unescape Escape View File

@ -4,102 +4,61 @@ import os
import six import six
from random import randint from random import randint
from PIL import Image, ImageOps from PIL import Image, ImageOps
import curses
ESC = b'\x1B' import sys, termios, tty, os, time
ETX = b'\x03'
SO = b'\x0E' def getch():
fd = sys.stdin.fileno()
GRAPHIC = b'\x1B'+b'\x2A'+b'\x01' #1B 2A old_settings = termios.tcgetattr(fd)
LINE_FEED = b'\n' try:
CARIDGE_RET = b'\x0D' tty.setraw(sys.stdin.fileno())
DATA = bytearray() ch = sys.stdin.read(1)
COLUMNS = 2000
H = COLUMNS // 256 finally:
L = COLUMNS % 256 termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
return ch
class Printer():
def _to_column_format(im, line_height): ESC = b'\x1B'
""" CHANGE_EMULATION = ESC+b'\x7B'+b'\x65'
Extract slices of an image as equal-sized blobs of column-format data. LINE_FEED = b'\n'
CARIDGE_RET = b'\x0D'
:param im: Image to extract from
:param line_height: Printed line height in dots strokes = 0
"""
width_pixels, height_pixels = im.size def printchar(self,char):
top = 0 with open('/dev/usb/lp0', 'wb') as printer:
left = 0 printer.write(self.ESC+b"\x7B"+b"\x41")
blobs = [] char=self.strokes*" "+char
while left < width_pixels: printer.write(bytes(str(char), 'utf-8'))
remaining_pixels = width_pixels - left printer.write(self.ESC+b"\x25"+b"\x46"+b"\x0F"+b"\x00"+b"\x04"+b"\x08"+b"\x00")
box = (left, top, left + line_height, top + height_pixels) self.strokes += 1
#transform: (size, method, data=None, resample=0, fill=1) if(self.strokes>78):
slice = im.transform((line_height, height_pixels), Image.EXTENT, box) printer.write(self.LINE_FEED)
bytes = slice.tobytes() self.strokes = 0
blobs.append(bytes)
left += line_height def newline(self):
return blobs global strokes
with open('/dev/usb/lp0', 'wb') as printer:
def _int_low_high(inp_number, out_bytes): printer.write(self.LINE_FEED)
""" Generate multiple bytes for a number: In lower and higher parts, or more parts as needed. self.strokes = 0
to generate the H and L value
:param inp_number: Input number
:param out_bytes: The number of bytes to output (1 - 4). def waitforinput():
""" while True:
max_input = (256 << (out_bytes * 8) - 1); char = getch()
if not 1 <= out_bytes <= 4:
raise ValueError("Can only output 1-4 byes") if (ord(char) == 27):
if not 0 <= inp_number <= max_input: print("exited publication :-(")
raise ValueError("Number too large. Can only output up to {0} in {1} byes".format(max_input, out_bytes)) exit(0)
outp = b''; if (ord(char) == 13):
for _ in range(0, out_bytes): printer.newline()
outp += six.int2byte(inp_number % 256) else:
inp_number = inp_number // 256 printer.printchar(char)
return outp
print("POETIC SOFTWARE")
parser = argparse.ArgumentParser(description='Process some imagefile') print("Let's boot into this publication together?")
parser.add_argument('--img',dest="img", print("cancel [ok]")
help='pass image to print') printer = Printer()
args = parser.parse_args() waitforinput()
filename = args.img
im = Image.open(filename)
basewidth = 350
# Initial rotate. mirror, and extract blobs for each 8 or 24-pixel row
# Convert to black & white via greyscale (so that bits can be inverted)
im = im.transpose(Image.ROTATE_270).transpose(Image.FLIP_LEFT_RIGHT)
height_pixels, width_pixels = im.size
if width_pixels > basewidth:
wpercent = (basewidth/float(im.size[0]))
hsize = int((float(im.size[1])*float(wpercent)))
im = im.resize((basewidth,hsize), Image.NEAREST)
height_pixels, width_pixels = im.size
im = im.resize((height_pixels,int(width_pixels*1.5)), Image.ANTIALIAS)
im = im.convert("L") # Invert: Only works on 'L' images
im = ImageOps.invert(im) # Bits are sent with 0 = white, 1 = black in ESC/POS
im = im.convert("1") # Pure black and white
line_height = 1
blobs = _to_column_format (im, line_height * 8);
#generate random Data
for i in range(COLUMNS):
DATA.append(randint(0,255))
height_pixels, width_pixels = im.size
with os.fdopen(sys.stdout.fileno(), 'wb') as fp:
fp.write(ESC+b"@")
fp.write(ESC + b"3" + six.int2byte(22)); # Adjust line-feed size
fp.write(CARIDGE_RET)
for blob in blobs:
fp.write(GRAPHIC + _int_low_high( width_pixels, 2 ) + blob)
fp.write(LINE_FEED)
#fp.write(GRAPHIC + bytes([L,H]) + DATA)
fp.write(ESC + b"2"); # Reset line-feed size

104
print_image.py
Unescape Escape View File

@ -0,0 +1,104 @@
import argparse
import sys
import os
import six
from random import randint
from PIL import Image, ImageOps
ESC = b'\x1B'
ETX = b'\x03'
SO = b'\x0E'
GRAPHIC = b'\x1B'+b'\x2A'+b'\x01' #1B 2A
LINE_FEED = b'\n'
CARIDGE_RET = b'\x0D'
DATA = bytearray()
COLUMNS = 2000
H = COLUMNS // 256
L = COLUMNS % 256
def _to_column_format(im, line_height):
"""
Extract slices of an image as equal-sized blobs of column-format data.
:param im: Image to extract from
:param line_height: Printed line height in dots
"""
width_pixels, height_pixels = im.size
top = 0
left = 0
blobs = []
while left < width_pixels:
remaining_pixels = width_pixels - left
box = (left, top, left + line_height, top + height_pixels)
#transform: (size, method, data=None, resample=0, fill=1)
slice = im.transform((line_height, height_pixels), Image.EXTENT, box)
bytes = slice.tobytes()
blobs.append(bytes)
left += line_height
return blobs
def _int_low_high(inp_number, out_bytes):
""" Generate multiple bytes for a number: In lower and higher parts, or more parts as needed.
to generate the H and L value
:param inp_number: Input number
:param out_bytes: The number of bytes to output (1 - 4).
"""
max_input = (256 << (out_bytes * 8) - 1);
if not 1 <= out_bytes <= 4:
raise ValueError("Can only output 1-4 byes")
if not 0 <= inp_number <= max_input:
raise ValueError("Number too large. Can only output up to {0} in {1} byes".format(max_input, out_bytes))
outp = b'';
for _ in range(0, out_bytes):
outp += six.int2byte(inp_number % 256)
inp_number = inp_number // 256
return outp
parser = argparse.ArgumentParser(description='Process some imagefile')
parser.add_argument('--img',dest="img",
help='pass image to print')
args = parser.parse_args()
filename = args.img
im = Image.open(filename)
basewidth = 350
# Initial rotate. mirror, and extract blobs for each 8 or 24-pixel row
# Convert to black & white via greyscale (so that bits can be inverted)
im = im.transpose(Image.ROTATE_270).transpose(Image.FLIP_LEFT_RIGHT)
height_pixels, width_pixels = im.size
if width_pixels > basewidth:
wpercent = (basewidth/float(im.size[0]))
hsize = int((float(im.size[1])*float(wpercent)))
im = im.resize((basewidth,hsize), Image.NEAREST)
height_pixels, width_pixels = im.size
im = im.resize((height_pixels,int(width_pixels*1.5)), Image.ANTIALIAS)
im = im.convert("L") # Invert: Only works on 'L' images
im = ImageOps.invert(im) # Bits are sent with 0 = white, 1 = black in ESC/POS
im = im.convert("1") # Pure black and white
line_height = 1
blobs = _to_column_format (im, line_height * 8);
#generate random Data
for i in range(COLUMNS):
DATA.append(randint(0,255))
height_pixels, width_pixels = im.size
with open('/dev/usb/lp0', 'wb') as fp:
fp.write(ESC+b"@")
fp.write(ESC+b"\x7B"+b"\x41")
fp.write(ESC + b"3" + six.int2byte(22)); # Adjust line-feed size
fp.write(CARIDGE_RET)
for blob in blobs:
fp.write(GRAPHIC + _int_low_high( width_pixels, 2 ) + blob)
fp.write(LINE_FEED)
#fp.write(GRAPHIC + bytes([L,H]) + DATA)
fp.write(ESC + b"2"); # Reset line-feed size
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