Updated README and documentation

Support for images vertically longer than 256 pixels

CHANGELOG

@@ -18,5 +18,26 @@ CHANGELOG
 - Added exception for PIL import
 
 * 2014-05-20 - Version 1.0.4
+- Issue #20: Added Density support (Sent by thomas.erbacher@ragapack.de)
 - Added charcode tables
 - Fixed Horizontal Tab
+- Fixed code tabulators
+
+* 2015-04-21 - Version 1.0.5
+- Merge pull request #45 from Krispy2009/master
+  . Raising the right error when wrong charcode is used
+  . Sent by Kristi <Krispy2009@gmail.com>
+
+* 2015-07-06 - Version 1.0.6
+- Merge pull request #53 from ldos/master
+  . Extended params for serial printers
+  . Sent by ldos <cafeteria.ldosalzira@gmail.com>
+
+* 2015-08-22 - Version 1.0.7
+- Issue #57: Fixed transparent images
+
+* 2015-10-27 - Version 1.0.8
+- Merge pull request #59 from zouppen/master
+  . Support for images vertically longer than 256 pixels
+  . Sent by Joel Lehtonen <joel.lehtonen@koodilehto.fi>
+- Updated README

README

@@ -4,16 +4,7 @@ ESCPOS
 Python library to manipulate ESC/POS Printers.
 
 ------------------------------------------------------------------
-1. Dependencies
+1. Description
-
-In order to start getting access to your printer, you must ensure
-you have previously installed the following python modules:
-
-  * pyusb (python-usb)
-  * PIL (Python Image Library)
-
-------------------------------------------------------------------
-2. Description
 
 Python ESC/POS is a library which lets the user have access to all
 those printers handled by ESC/POS commands, as defined by Epson,
@@ -33,57 +24,22 @@ paper, carrier return, printer reset and others concerned to the
 carriage alignment.
 
 ------------------------------------------------------------------
-3. Define your printer
+2. Documentation
 
-Before start create your Python ESC/POS printer instance, you must
+Please visit project documentation at:
-see at your system for the printer parameters. This is done with
+https://github.com/manpaz/python-escpos/wiki
-the 'lsusb' command.
-
-First run the command to look for the "Vendor ID" and "Product ID",
-then write down the values, these values are displayed just before
-the name of the device with the following format:
-
-  xxxx:xxxx
-
-Example:
-  Bus 002 Device 001: ID 1a2b:1a2b Device name
-
-Write down the the values in question, then issue the following
-command so you can get the "Interface" number and "End Point"
-
-  lsusb -vvv -d xxxx:xxxx | grep iInterface
-  lsusb -vvv -d xxxx:xxxx | grep bEndpointAddress | grep OUT
-
-The first command will yields the "Interface" number that must
-be handy to have and the second yields the "Output Endpoint"
-address.
-
-By default the "Interface" number is "0" and the "Output Endpoint"
-address is "0x82",  if you have other values then you can define
-with your instance.
 
 ------------------------------------------------------------------
-4. Define your instance
+3. Donations
 
-The following example shows how to initialize the Epson TM-TI88IV
+There are some different prints I'd like to acquire, but unfortunately
-*** NOTE: Always finish the sequence with Epson.cut() otherwise
+not all, even used, are cheaper and easy to get.
-          you will endup with weird chars being printed.
 
-  from escpos import *
+If you want to help funding money to get more printers or just want to
+donate because you like the project, please be in touch and I'll be
+sending my PayPal info so you can donate.
 
-  """ Seiko Epson Corp. Receipt Printer M129 Definitions (EPSON TM-T88IV) """
+Thank you!
-  Epson = escpos.Escpos(0x04b8,0x0202,0)
-  Epson.text("Hello World")
-  Epson.image("logo.gif")
-  Epson.barcode
-  Epson.barcode('1324354657687','EAN13',64,2,'','')
-  Epson.cut()
-
-------------------------------------------------------------------
-5. Links
-
-Please visit project homepage at:
-http://repo.bashlinux.com/projects/escpos.html
 
 Manuel F Martinez <manpaz@bashlinux.com>
 

escpos/constants.py

@@ -21,6 +21,7 @@ PAPER_PART_CUT  = '\x1d\x56\x01' # Partial cut paper
 TXT_NORMAL      = '\x1b\x21\x00' # Normal text
 TXT_2HEIGHT     = '\x1b\x21\x10' # Double height text
 TXT_2WIDTH      = '\x1b\x21\x20' # Double width text
+TXT_4SQUARE     = '\x1b\x21\x30' # Quad area text
 TXT_UNDERL_OFF  = '\x1b\x2d\x00' # Underline font OFF
 TXT_UNDERL_ON   = '\x1b\x2d\x01' # Underline font 1-dot ON
 TXT_UNDERL2_ON  = '\x1b\x2d\x02' # Underline font 2-dot ON
@@ -73,3 +74,13 @@ S_RASTER_N      = '\x1d\x76\x30\x00' # Set raster image normal size
 S_RASTER_2W     = '\x1d\x76\x30\x01' # Set raster image double width
 S_RASTER_2H     = '\x1d\x76\x30\x02' # Set raster image double height
 S_RASTER_Q      = '\x1d\x76\x30\x03' # Set raster image quadruple
+# Printing Density
+PD_N50          = '\x1d\x7c\x00' # Printing Density -50%
+PD_N37          = '\x1d\x7c\x01' # Printing Density -37.5%
+PD_N25          = '\x1d\x7c\x02' # Printing Density -25%
+PD_N12          = '\x1d\x7c\x03' # Printing Density -12.5%
+PD_0            = '\x1d\x7c\x04' # Printing Density  0%
+PD_P50          = '\x1d\x7c\x08' # Printing Density +50%
+PD_P37          = '\x1d\x7c\x07' # Printing Density +37.5%
+PD_P25          = '\x1d\x7c\x06' # Printing Density +25%
+PD_P12          = '\x1d\x7c\x05' # Printing Density +12.5%

escpos/escpos.py

@@ -3,7 +3,7 @@
 @author: Manuel F Martinez <manpaz@bashlinux.com>
 @organization: Bashlinux
 @copyright: Copyright (c) 2012 Bashlinux
-@license: GPL
+@license: GNU GPL v3
 """
 
 try:
@@ -41,7 +41,7 @@ class Escpos:
         buffer = ""
        
         self._raw(S_RASTER_N)
-        buffer = "%02X%02X%02X%02X" % (((size[0]/size[1])/8), 0, size[1], 0)
+        buffer = "%02X%02X%02X%02X" % (((size[0]/size[1])/8), 0, size[1]&0xff, size[1]>>8)
         self._raw(buffer.decode('hex'))
         buffer = ""
 
@@ -68,7 +68,7 @@ class Escpos:
 
         if im.size[0] > 512:
             print  ("WARNING: Image is wider than 512 and could be truncated at print time ")
-        if im.size[1] > 255:
+        if im.size[1] > 0xffff:
             raise ImageSizeError()
 
         im_border = self._check_image_size(im.size[0])
@@ -107,7 +107,15 @@ class Escpos:
     def image(self,path_img):
         """ Open image file """
         im_open = Image.open(path_img)
+
+	# Remove the alpha channel on transparent images
+	if im_open.mode == 'RGBA':
+		im_open.load()
+		im = Image.new("RGB", im_open.size, (255, 255, 255))
+		im.paste(im_open, mask=im_open.split()[3])
+	else:
 	        im = im_open.convert("RGB")
+
         # Convert the RGB image in printable image
         self._convert_image(im)
 
@@ -119,6 +127,7 @@ class Escpos:
         qr_code.make(fit=True)
         qr_img = qr_code.make_image()
         im = qr_img._img.convert("RGB")
+
         # Convert the RGB image in printable image
         self._convert_image(im)
 
@@ -168,7 +177,7 @@ class Escpos:
         elif code.upper() == "THAI18":
             self._raw(CHARCODE_THAI18)
         else:
-            raise CharCode_error()
+            raise CharCodeError()
 
     def barcode(self, code, bc, width, height, pos, font):
         """ Print Barcode """
@@ -230,12 +239,12 @@ class Escpos:
             raise TextError()
 
 
-    def set(self, align='left', font='a', type='normal', width=1, height=1):
+    def set(self, align='left', font='a', type='normal', width=1, height=1, density=9):
         """ Set text properties """
         # Width
         if height == 2 and width == 2:
-            self._raw(TXT_2WIDTH)
+            self._raw(TXT_NORMAL)
-            self._raw(TXT_2HEIGHT)
+            self._raw(TXT_4SQUARE)
         elif height == 2 and width != 2:
             self._raw(TXT_NORMAL)
             self._raw(TXT_2HEIGHT)
@@ -254,7 +263,6 @@ class Escpos:
         elif type.upper() == "U2":
             self._raw(TXT_BOLD_OFF)
             self._raw(TXT_UNDERL2_ON)
-            self._raw(TXT_ITALIC_OFF)
         elif type.upper() == "BU":
             self._raw(TXT_BOLD_ON)
             self._raw(TXT_UNDERL_ON)
@@ -276,6 +284,27 @@ class Escpos:
             self._raw(TXT_ALIGN_RT)
         elif align.upper() == "LEFT":
             self._raw(TXT_ALIGN_LT)
+        # Density
+        if density == 0:
+            self._raw(PD_N50)
+        elif density == 1:
+            self._raw(PD_N37)
+        elif density == 2:
+            self._raw(PD_N25)
+        elif density == 3:
+            self._raw(PD_N12)
+        elif density == 4:
+            self._raw(PD_0)
+        elif density == 5:
+            self._raw(PD_P12)
+        elif density == 6:
+            self._raw(PD_P25)
+        elif density == 7:
+            self._raw(PD_P37)
+        elif density == 8:
+            self._raw(PD_P50)
+        else:# DEFAULT: DOES NOTHING
+            pass
 
 
     def cut(self, mode=''):

escpos/printer.py

@@ -3,7 +3,7 @@
 @author: Manuel F Martinez <manpaz@bashlinux.com>
 @organization: Bashlinux
 @copyright: Copyright (c) 2012 Bashlinux
-@license: GPL
+@license: GNU GPL v3
 """
 
 import usb.core
@@ -40,10 +40,18 @@ class Usb(Escpos):
         if self.device is None:
             print "Cable isn't plugged in"
 
-        if self.device.is_kernel_driver_active(0):
+        check_driver = None
+
+        try:
+            check_driver = self.device.is_kernel_driver_active(0)
+        except NotImplementedError:
+            pass
+
+        if check_driver is None or check_driver:
             try:
                 self.device.detach_kernel_driver(0)
             except usb.core.USBError as e:
+                if check_driver is not None:
                     print "Could not detatch kernel driver: %s" % str(e)
 
         try:
@@ -69,23 +77,39 @@ class Usb(Escpos):
 class Serial(Escpos):
     """ Define Serial printer """
 
-    def __init__(self, devfile="/dev/ttyS0", baudrate=9600, bytesize=8, timeout=1):
+    def __init__(self, devfile="/dev/ttyS0", baudrate=9600, bytesize=8, timeout=1,
+                 parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE,
+                 xonxoff=False , dsrdtr=True):
         """
         @param devfile  : Device file under dev filesystem
         @param baudrate : Baud rate for serial transmission
         @param bytesize : Serial buffer size
         @param timeout  : Read/Write timeout
+        
+        @param parity   : Parity checking
+        @param stopbits : Number of stop bits
+        @param xonxoff  : Software flow control
+        @param dsrdtr   : Hardware flow control (False to enable RTS/CTS)
         """
         self.devfile  = devfile
         self.baudrate = baudrate
         self.bytesize = bytesize
         self.timeout  = timeout
+        
+        self.parity = parity
+        self.stopbits = stopbits
+        self.xonxoff = xonxoff
+        self.dsrdtr = dsrdtr
+        
         self.open()
 
 
     def open(self):
         """ Setup serial port and set is as escpos device """
-        self.device = serial.Serial(port=self.devfile, baudrate=self.baudrate, bytesize=self.bytesize, parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE, timeout=self.timeout, dsrdtr=True)
+        self.device = serial.Serial(port=self.devfile, baudrate=self.baudrate,
+                                    bytesize=self.bytesize, parity=self.parity,
+                                    stopbits=self.stopbits, timeout=self.timeout,
+                                    xonxoff=self.xonxoff, dsrdtr=self.dsrdtr)
 
         if self.device is not None:
             print "Serial printer enabled"

setup.py

@@ -4,9 +4,9 @@ from distutils.core import setup
 
 setup(
     name='escpos',
-    version='1.0.4',
+    version='1.0.8',
-    url='http://code.google.com/p/python-escpos',
+    url='https://github.com/manpaz/python-escpos',
-    download_url='http://python-escpos.googlecode.com/files/python-escpos-1.0.zip',
+    download_url='https://github.com/manpaz/python-escpos.git',
     description='Python library to manipulate ESC/POS Printers',
     license='GNU GPL v3',
     long_description=open('README').read(),