setop/python-escpos
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Merge branch 'master' into debian/jessie

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This commit is contained in:
Christoph Heuel
2015-12-13 14:25:19 +01:00
parent 2a2ba9a0e2 aa4ffdd21b
commit d50c407edb
8 changed files with 241 additions and 171 deletions
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3
.hgignore → .gitignore vendored
View File

@@ -1,10 +1,9 @@
# python temporary files
syntax: glob
*.pyc
# editor autosaves
$~
.idea/
# temporary data
syntax: regexp
temp

160
escpos/escpos.py
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@@ -19,17 +19,39 @@ import binascii
from .constants import *
from .exceptions import *
class Escpos:
from abc import ABCMeta, abstractmethod # abstract base class support
class Escpos(object):
""" ESC/POS Printer object """
__metaclass__ = ABCMeta
device = None
def __init__(self, columns=32):
""" Initialize ESCPOS Printer
:param columns: Text columns used by the printer. Defaults to 32."""
self.columns = columns
def _check_image_size(self, size):
""" Check and fix the size of the image to 32 bits """
@abstractmethod
def _raw(self, msg):
""" Sends raw data to the printer
This function has to be individually implemented by the implementations.
:param msg: message string to be sent to the printer
"""
pass
@staticmethod
def _check_image_size(size):
""" Check and fix the size of the image to 32 bits
:param size: size of the image
:returns: tuple of image borders
:rtype: (int, int)
"""
if size % 32 == 0:
return (0, 0)
return 0, 0
else:
image_border = 32 - (size % 32)
if (image_border % 2) == 0:
@@ -37,31 +59,37 @@ class Escpos:
else:
return (round(image_border / 2), round((image_border / 2) + 1))
def _print_image(self, line, size):
""" Print formatted image """
""" Print formatted image
:param line:
:param size:
"""
i = 0
cont = 0
buffer = ""
pbuffer = ""
self._raw(S_RASTER_N)
buffer = "%02X%02X%02X%02X" % (((size[0]/size[1])/8), 0, size[1]&0xff, size[1]>>8)
self._raw(binascii.unhexlify(buffer))
buffer = ""
pbuffer = "%02X%02X%02X%02X" % (((size[0]/size[1])/8), 0, size[1] & 0xff, size[1] >> 8)
self._raw(binascii.unhexlify(pbuffer))
pbuffer = ""
while i < len(line):
hex_string = int(line[i:i+8], 2)
buffer += "%02X" % hex_string
pbuffer += "%02X" % hex_string
i += 8
cont += 1
if cont % 4 == 0:
self._raw(binascii.unhexlify(buffer))
buffer = ""
self._raw(binascii.unhexlify(pbuffer))
pbuffer = ""
cont = 0
def _convert_image(self, im):
""" Parse image and prepare it to a printable format """
""" Parse image and prepare it to a printable format
:param im: image data
:raises: ImageSizeError
"""
pixels = []
pix_line = ""
im_left = ""
@@ -69,7 +97,6 @@ class Escpos:
switch = 0
img_size = [0, 0]
if im.size[0] > 512:
print ("WARNING: Image is wider than 512 and could be truncated at print time ")
if im.size[1] > 0xffff:
@@ -99,7 +126,7 @@ class Escpos:
else:
pix_line += im_pattern[x]
break
elif im_color > (255 * 3 / pattern_len * pattern_len) and im_color <= (255 * 3):
elif (255 * 3 / pattern_len * pattern_len) < im_color <= (255 * 3):
pix_line += im_pattern[-1]
break
pix_line += im_right
@@ -107,9 +134,11 @@ class Escpos:
self._print_image(pix_line, img_size)
def image(self, path_img):
""" Open image file """
""" Open image file
:param path_img: path to image
"""
im_open = Image.open(path_img)
# Remove the alpha channel on transparent images
@@ -154,10 +183,13 @@ class Escpos:
i = 0
temp = 0
self._raw(binascii.unhexlify(bytes(buf, "ascii")))
self._raw('\n')
def qr(self, text):
""" Print QR Code for the provided string """
""" Print QR Code for the provided string
:param text: text to generate a QR-Code from
"""
qr_code = qrcode.QRCode(version=4, box_size=4, border=1)
qr_code.add_data(text)
qr_code.make(fit=True)
@@ -167,9 +199,14 @@ class Escpos:
# Convert the RGB image in printable image
self._convert_image(im)
def charcode(self, code):
""" Set Character Code Table """
""" Set Character Code Table
Sends the control sequence from constants.py to the printer with :py:meth:`escpos.printer._raw()`.
:param code: Name of CharCode
:raises: CharCodeError
"""
if code.upper() == "USA":
self._raw(CHARCODE_PC437)
elif code.upper() == "JIS":
@@ -188,8 +225,8 @@ class Escpos:
self._raw(CHARCODE_GREEK)
elif code.upper() == "HEBREW":
self._raw(CHARCODE_HEBREW)
elif code.upper() == "LATVIAN":
self._raw(CHARCODE_PC755)
# elif code.upper() == "LATVIAN": # this is not listed in the constants
# self._raw(CHARCODE_PC755)
elif code.upper() == "WPC1252":
self._raw(CHARCODE_PC1252)
elif code.upper() == "CIRILLIC2":
@@ -216,7 +253,16 @@ class Escpos:
raise CharCodeError()
def barcode(self, code, bc, width, height, pos, font):
""" Print Barcode """
""" Print Barcode
:param code: data for barcode
:param bc: barcode format, see constants.py
:param width: barcode width, has to be between 1 and 255
:param height: barcode height, has to be between 2 and 6
:param pos: position of text in barcode, default when nothing supplied is below
:param font: select font, default is font A
:raises: BarcodeSizeError, BarcodeTypeError, BarcodeCodeError
"""
# Align Bar Code()
self._raw(TXT_ALIGN_CT)
# Height
@@ -264,11 +310,15 @@ class Escpos:
if code:
self._raw(code)
else:
raise exception.BarcodeCodeError()
raise BarcodeCodeError()
def text(self, txt):
""" Print alpha-numeric text """
""" Print alpha-numeric text
The text has to be encoded in the currently selected codepage.
:param txt: text to be printed
:raises: TextError
"""
if txt:
self._raw(txt)
else:
@@ -279,8 +329,16 @@ class Escpos:
colCount = self.columns if columns == None else columns
self.text(textwrap.fill(txt, colCount))
def set(self, align='left', font='a', type='normal', width=1, height=1, density=9):
""" Set text properties """
def set(self, align='left', font='a', text_type='normal', width=1, height=1, density=9):
""" Set text properties by sending them to the printer
:param align: alignment of text
:param font: font A or B
:param text_type: add bold or underlined
:param width: text width, normal or double width
:param height: text height, normal or double height
:param density: print density
"""
# Width
if height == 2 and width == 2:
self._raw(TXT_NORMAL)
@@ -294,22 +352,22 @@ class Escpos:
else: # DEFAULT SIZE: NORMAL
self._raw(TXT_NORMAL)
# Type
if type.upper() == "B":
if text_type.upper() == "B":
self._raw(TXT_BOLD_ON)
self._raw(TXT_UNDERL_OFF)
elif type.upper() == "U":
elif text_type.upper() == "U":
self._raw(TXT_BOLD_OFF)
self._raw(TXT_UNDERL_ON)
elif type.upper() == "U2":
elif text_type.upper() == "U2":
self._raw(TXT_BOLD_OFF)
self._raw(TXT_UNDERL2_ON)
elif type.upper() == "BU":
elif text_type.upper() == "BU":
self._raw(TXT_BOLD_ON)
self._raw(TXT_UNDERL_ON)
elif type.upper() == "BU2":
elif text_type.upper() == "BU2":
self._raw(TXT_BOLD_ON)
self._raw(TXT_UNDERL2_ON)
elif type.upper == "NORMAL":
elif text_type.upper == "NORMAL":
self._raw(TXT_BOLD_OFF)
self._raw(TXT_UNDERL_OFF)
# Font
@@ -346,9 +404,11 @@ class Escpos:
else: # DEFAULT: DOES NOTHING
pass
def cut(self, mode=''):
""" Cut paper """
""" Cut paper
:param mode: set to 'PART' for a partial cut
"""
# Fix the size between last line and cut
# TODO: handle this with a line feed
self._raw("\n\n\n\n\n\n")
@@ -357,9 +417,13 @@ class Escpos:
else: # DEFAULT MODE: FULL CUT
self._raw(PAPER_FULL_CUT)
def cashdraw(self, pin):
""" Send pulse to kick the cash drawer """
""" Send pulse to kick the cash drawer
Kick cash drawer on pin 2 or pin 5.
:param pin: pin number
:raises: CashDrawerError
"""
if pin == 2:
self._raw(CD_KICK_2)
elif pin == 5:
@@ -367,9 +431,11 @@ class Escpos:
else:
raise CashDrawerError()
def hw(self, hw):
""" Hardware operations """
""" Hardware operations
:param hw: hardware action
"""
if hw.upper() == "INIT":
self._raw(HW_INIT)
elif hw.upper() == "SELECT":
@@ -379,12 +445,14 @@ class Escpos:
else: # DEFAULT: DOES NOTHING
pass
def control(self, ctl, pos=4):
""" Feed control sequences """
""" Feed control sequences
:raises: TabPosError
"""
# Set tab positions
if pos < 1 or pos > 16:
raise TabError()
raise TabPosError()
else:
self._raw("".join([CTL_SET_HT, hex(pos)]))
# Set position

17
escpos/exceptions.py
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@@ -1,6 +1,5 @@
""" ESC/POS Exceptions classes """
import os
class Error(Exception):
""" Base class for ESC/POS errors """
@@ -27,6 +26,7 @@ class Error(Exception):
class BarcodeTypeError(Error):
"""No Barcode type defined """
def __init__(self, msg=""):
Error.__init__(self, msg)
self.msg = msg
@@ -35,7 +35,9 @@ class BarcodeTypeError(Error):
def __str__(self):
return "No Barcode type is defined"
class BarcodeSizeError(Error):
""" Barcode size is out of range """
def __init__(self, msg=""):
Error.__init__(self, msg)
self.msg = msg
@@ -44,16 +46,20 @@ class BarcodeSizeError(Error):
def __str__(self):
return "Barcode size is out of range"
class BarcodeCodeError(Error):
""" No Barcode code was supplied """
def __init__(self, msg=""):
Error.__init__(self, msg)
self.msg = msg
self.resultcode = 30
def __str__(self):
return "Code was not supplied"
return "No Barcode code was supplied"
class ImageSizeError(Error):
""" Image height is longer than 255px and can't be printed """
def __init__(self, msg=""):
Error.__init__(self, msg)
self.msg = msg
@@ -62,7 +68,9 @@ class ImageSizeError(Error):
def __str__(self):
return "Image height is longer than 255px and can't be printed"
class TextError(Error):
""" Test sting must be supplied to the text() method """
def __init__(self, msg=""):
Error.__init__(self, msg)
self.msg = msg
@@ -73,6 +81,7 @@ class TextError(Error):
class CashDrawerError(Error):
""" Valid pin must be set to send pulse """
def __init__(self, msg=""):
Error.__init__(self, msg)
self.msg = msg
@@ -82,7 +91,8 @@ class CashDrawerError(Error):
return "Valid pin must be set to send pulse"
class TabError(Error):
class TabPosError(Error):
""" Valid tab positions must be in the range 0 to 16 """
def __init__(self, msg=""):
Error.__init__(self, msg)
self.msg = msg
@@ -93,6 +103,7 @@ class TabError(Error):
class CharCodeError(Error):
""" Valid char code must be set """
def __init__(self, msg=""):
Error.__init__(self, msg)
self.msg = msg

29
escpos/printer.py
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@@ -15,16 +15,17 @@ from .escpos import *
from .constants import *
from .exceptions import *
class Usb(Escpos):
""" Define USB printer """
def __init__(self, idVendor, idProduct, interface=0, in_ep=0x82, out_ep=0x01, *args, **kwargs):
"""
@param idVendor : Vendor ID
@param idProduct : Product ID
@param interface : USB device interface
@param in_ep : Input end point
@param out_ep : Output end point
:param idVendor: Vendor ID
:param idProduct: Product ID
:param interface: USB device interface
:param in_ep: Input end point
:param out_ep: Output end point
"""
Escpos.__init__(self, *args, **kwargs)
self.idVendor = idVendor
@@ -34,9 +35,8 @@ class Usb(Escpos):
self.out_ep = out_ep
self.open()
def open(self):
""" Search device on USB tree and set is as escpos device """
""" Search device on USB tree and set it as escpos device """
self.device = usb.core.find(idVendor=self.idVendor, idProduct=self.idProduct)
if self.device is None:
print("Cable isn't plugged in")
@@ -61,12 +61,10 @@ class Usb(Escpos):
except usb.core.USBError as e:
print("Could not set configuration: %s" % str(e))
def _raw(self, msg):
""" Print any command sent in raw format """
self.device.write(self.out_ep, msg, self.interface)
def __del__(self):
""" Release USB interface """
if self.device:
@@ -74,7 +72,6 @@ class Usb(Escpos):
self.device = None
class Serial(Escpos):
""" Define Serial printer """
@@ -97,7 +94,6 @@ class Serial(Escpos):
self.baudrate = baudrate
self.bytesize = bytesize
self.timeout = timeout
self.parity = parity
self.stopbits = stopbits
self.xonxoff = xonxoff
@@ -105,7 +101,6 @@ class Serial(Escpos):
self.open()
def open(self):
""" Setup serial port and set is as escpos device """
self.device = serial.Serial(port=self.devfile, baudrate=self.baudrate,
@@ -118,19 +113,16 @@ class Serial(Escpos):
else:
print("Unable to open serial printer on: %s" % self.devfile)
def _raw(self, msg):
""" Print any command sent in raw format """
self.device.write(msg)
def __del__(self):
""" Close Serial interface """
if self.device is not None:
self.device.close()
class Network(Escpos):
""" Define Network printer """
@@ -144,7 +136,6 @@ class Network(Escpos):
self.port = port
self.open()
def open(self):
""" Open TCP socket and set it as escpos device """
self.device = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
@@ -153,18 +144,15 @@ class Network(Escpos):
if self.device is None:
print("Could not open socket for %s" % self.host)
def _raw(self, msg):
""" Print any command sent in raw format """
self.device.send(msg)
def __del__(self):
""" Close TCP connection """
self.device.close()
class File(Escpos):
""" Define Generic file printer """
@@ -176,7 +164,6 @@ class File(Escpos):
self.devfile = devfile
self.open()
def open(self):
""" Open system file """
self.device = open(self.devfile, "wb")
@@ -188,7 +175,6 @@ class File(Escpos):
"""Flush printing content"""
self.device.flush()
def _raw(self, msg):
""" Print any command sent in raw format """
if type(msg) is str:
@@ -196,7 +182,6 @@ class File(Escpos):
else:
self.device.write(msg);
def __del__(self):
""" Close system file """
self.device.close()

1
requirements.txt Normal file
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@@ -0,0 +1 @@
-e .

8
setup.py
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@@ -23,7 +23,13 @@ setup(
'Operating System :: GNU/Linux',
'Intended Audience :: Developers',
'Programming Language :: Python',
'Topic :: System :: Pheripherals',
'Topic :: System :: Peripherals',
'Topic :: Software Development :: Libraries :: Python Modules',
],
install_requires=[
'pyusb',
'Pillow>=2.0',
'qrcode>=4.0',
'pyserial',
],
)