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python-escpos
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python 3 readiness

This commit is contained in:
Adusso 2014-05-31 17:05:46 +03:00
parent 42309fedfe
commit 916de838e0
2 changed files with 53 additions and 53 deletions
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90
escpos/constants.py
View File

@ -1,54 +1,54 @@
""" ESC/POS Commands (Constants) """
# Feed control sequences
CTL_LF = '\x0a' # Print and line feed
CTL_FF = '\x0c' # Form feed
CTL_CR = '\x0d' # Carriage return
CTL_HT = '\x09' # Horizontal tab
CTL_VT = '\x0b' # Vertical tab
CTL_LF = b'\x0a' # Print and line feed
CTL_FF = b'\x0c' # Form feed
CTL_CR = b'\x0d' # Carriage return
CTL_HT = b'\x09' # Horizontal tab
CTL_VT = b'\x0b' # Vertical tab
# Printer hardware
HW_INIT = '\x1b\x40' # Clear data in buffer and reset modes
HW_SELECT = '\x1b\x3d\x01' # Printer select
HW_RESET = '\x1b\x3f\x0a\x00' # Reset printer hardware
HW_INIT = b'\x1b\x40' # Clear data in buffer and reset modes
HW_SELECT = b'\x1b\x3d\x01' # Printer select
HW_RESET = b'\x1b\x3f\x0a\x00' # Reset printer hardware
# Cash Drawer
CD_KICK_2 = '\x1b\x70\x00' # Sends a pulse to pin 2 []
CD_KICK_5 = '\x1b\x70\x01' # Sends a pulse to pin 5 []
CD_KICK_2 = b'\x1b\x70\x00' # Sends a pulse to pin 2 []
CD_KICK_5 = b'\x1b\x70\x01' # Sends a pulse to pin 5 []
# Paper
PAPER_FULL_CUT = '\x1d\x56\x00' # Full cut paper
PAPER_PART_CUT = '\x1d\x56\x01' # Partial cut paper
PAPER_FULL_CUT = b'\x1d\x56\x00' # Full cut paper
PAPER_PART_CUT = b'\x1d\x56\x01' # Partial cut paper
# Text format
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
TXT_BOLD_OFF = '\x1b\x45\x00' # Bold font OFF
TXT_BOLD_ON = '\x1b\x45\x01' # Bold font ON
TXT_FONT_A = '\x1b\x4d\x00' # Font type A
TXT_FONT_B = '\x1b\x4d\x01' # Font type B
TXT_ALIGN_LT = '\x1b\x61\x00' # Left justification
TXT_ALIGN_CT = '\x1b\x61\x01' # Centering
TXT_ALIGN_RT = '\x1b\x61\x02' # Right justification
TXT_NORMAL = b'\x1b\x21\x00' # Normal text
TXT_2HEIGHT = b'\x1b\x21\x10' # Double height text
TXT_2WIDTH = b'\x1b\x21\x20' # Double width text
TXT_4SQUARE = b'\x1b\x21\x30' # Quad area text
TXT_UNDERL_OFF = b'\x1b\x2d\x00' # Underline font OFF
TXT_UNDERL_ON = b'\x1b\x2d\x01' # Underline font 1-dot ON
TXT_UNDERL2_ON = b'\x1b\x2d\x02' # Underline font 2-dot ON
TXT_BOLD_OFF = b'\x1b\x45\x00' # Bold font OFF
TXT_BOLD_ON = b'\x1b\x45\x01' # Bold font ON
TXT_FONT_A = b'\x1b\x4d\x00' # Font type A
TXT_FONT_B = b'\x1b\x4d\x01' # Font type B
TXT_ALIGN_LT = b'\x1b\x61\x00' # Left justification
TXT_ALIGN_CT = b'\x1b\x61\x01' # Centering
TXT_ALIGN_RT = b'\x1b\x61\x02' # Right justification
# Barcode format
BARCODE_TXT_OFF = '\x1d\x48\x00' # HRI barcode chars OFF
BARCODE_TXT_ABV = '\x1d\x48\x01' # HRI barcode chars above
BARCODE_TXT_BLW = '\x1d\x48\x02' # HRI barcode chars below
BARCODE_TXT_BTH = '\x1d\x48\x03' # HRI barcode chars both above and below
BARCODE_FONT_A = '\x1d\x66\x00' # Font type A for HRI barcode chars
BARCODE_FONT_B = '\x1d\x66\x01' # Font type B for HRI barcode chars
BARCODE_HEIGHT = '\x1d\x68\x64' # Barcode Height [1-255]
BARCODE_WIDTH = '\x1d\x77\x03' # Barcode Width [2-6]
BARCODE_UPC_A = '\x1d\x6b\x00' # Barcode type UPC-A
BARCODE_UPC_E = '\x1d\x6b\x01' # Barcode type UPC-E
BARCODE_EAN13 = '\x1d\x6b\x02' # Barcode type EAN13
BARCODE_EAN8 = '\x1d\x6b\x03' # Barcode type EAN8
BARCODE_CODE39 = '\x1d\x6b\x04' # Barcode type CODE39
BARCODE_ITF = '\x1d\x6b\x05' # Barcode type ITF
BARCODE_NW7 = '\x1d\x6b\x06' # Barcode type NW7
BARCODE_TXT_OFF = b'\x1d\x48\x00' # HRI barcode chars OFF
BARCODE_TXT_ABV = b'\x1d\x48\x01' # HRI barcode chars above
BARCODE_TXT_BLW = b'\x1d\x48\x02' # HRI barcode chars below
BARCODE_TXT_BTH = b'\x1d\x48\x03' # HRI barcode chars both above and below
BARCODE_FONT_A = b'\x1d\x66\x00' # Font type A for HRI barcode chars
BARCODE_FONT_B = b'\x1d\x66\x01' # Font type B for HRI barcode chars
BARCODE_HEIGHT = b'\x1d\x68\x64' # Barcode Height [1-255]
BARCODE_WIDTH = b'\x1d\x77\x03' # Barcode Width [2-6]
BARCODE_UPC_A = b'\x1d\x6b\x00' # Barcode type UPC-A
BARCODE_UPC_E = b'\x1d\x6b\x01' # Barcode type UPC-E
BARCODE_EAN13 = b'\x1d\x6b\x02' # Barcode type EAN13
BARCODE_EAN8 = b'\x1d\x6b\x03' # Barcode type EAN8
BARCODE_CODE39 = b'\x1d\x6b\x04' # Barcode type CODE39
BARCODE_ITF = b'\x1d\x6b\x05' # Barcode type ITF
BARCODE_NW7 = b'\x1d\x6b\x06' # Barcode type NW7
# Image format
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
S_RASTER_N = b'\x1d\x76\x30\x00' # Set raster image normal size
S_RASTER_2W = b'\x1d\x76\x30\x01' # Set raster image double width
S_RASTER_2H = b'\x1d\x76\x30\x02' # Set raster image double height
S_RASTER_Q = b'\x1d\x76\x30\x03' # Set raster image quadruple

16
escpos/escpos.py
View File

@ -27,9 +27,9 @@ class Escpos:
else:
image_border = 32 - (size % 32)
if (image_border % 2) == 0:
return (image_border / 2, image_border / 2)
return (image_border // 2, image_border // 2)
else:
return (image_border / 2, (image_border / 2) + 1)
return (image_border // 2, (image_border // 2) + 1)
def _print_image(self, line, size):
@ -39,7 +39,7 @@ 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], 0)
self._raw(buffer.decode('hex'))
buffer = ""
@ -66,11 +66,11 @@ class Escpos:
lut = []
for b in range(0, len(h), 256):
# step size
step = reduce(operator.add, h[b:b+256]) / 255
step = reduce(operator.add, h[b:b+256]) // 255
# create equalization lookup table
n = 0
for i in range(256):
lut.append(n / step)
lut.append(n // step)
n = n + h[i+b]
im = im.point(lut)
@ -105,7 +105,7 @@ class Escpos:
im = Image.open(img).convert("RGB")
if im.size[0] > 512:
print "WARNING: Image is wider than 512 and could be truncated at print time "
print("WARNING: Image is wider than 512 and could be truncated at print time ")
if im.size[1] > 255:
raise ImageSizeError()
@ -127,13 +127,13 @@ class Escpos:
pattern_len = len(im_pattern)
switch = (switch - 1 ) * (-1)
for x in range(pattern_len):
if im_color <= (255 * 3 / pattern_len * (x+1)):
if im_color <= (255 * 3 // pattern_len * (x+1)):
if im_pattern[x] == "X":
pix_line += "%d" % switch
else:
pix_line += im_pattern[x]
break
elif im_color > (255 * 3 / pattern_len * pattern_len) and im_color <= (255 * 3):
elif im_color > (255 * 3 // pattern_len * pattern_len) and im_color <= (255 * 3):
pix_line += im_pattern[-1]
break
pix_line += im_right