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Add width/height multiplier support, upsidedown text and text smoothing

This commit is contained in:
Dean Rispin 2016-03-01 10:05:52 -08:00
parent 7c98de6727
commit 8d00e63b87
3 changed files with 43 additions and 9 deletions
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6
doc/user/methods.rst
View File

@ -65,8 +65,8 @@ text("text")
Prints raw text. Raises ``TextError`` exception.
set("align", "font", "type", width, height, invert)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
set("align", "font", "type", width, height, invert, smooth, flip)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Set text properties.
* ``align`` set horizontal position for text, the possible values are:
@ -80,6 +80,8 @@ Set text properties.
* ``width`` is a numeric value, 1 is for regular size, and 2 is twice the standard size. *Default*: 1
* ``height`` is a numeric value, 1 is for regular size and 2 is twice the standard size. *Default*: 1
* ``invert`` is a boolean value, True enables white on black printing. *Default*: False
* ``smooth`` is a boolean value, True enables text smoothing. *Default*: False
* ``flip`` is a boolean value, True enables upside-down text. *Default*: False
cut("mode")
^^^^^^^^^^^

21
escpos/constants.py
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@ -50,6 +50,27 @@ PAPER_PART_CUT = _CUT_PAPER('\x01') # Partial cut paper
# Text format
# TODO: Acquire the "ESC/POS Application Programming Guide for Paper Roll
# Printers" and tidy up this stuff too.
TXT_FLIP_ON = ESC + '\x7b\x01'
TXT_FLIP_OFF = ESC + '\x7b\x00'
TXT_SMOOTH_ON = GS + '\x62\x01'
TXT_SMOOTH_OFF = GS + '\x62\x00'
TXT_SIZE = GS + '!'
TXT_WIDTH = {1: 0x00,
2: 0x10,
3: 0x20,
4: 0x30,
5: 0x40,
6: 0x50,
7: 0x60,
8: 0x70}
TXT_HEIGHT = {1: 0x00,
2: 0x01,
3: 0x02,
4: 0x03,
5: 0x04,
6: 0x05,
7: 0x06,
8: 0x07}
TXT_NORMAL = ESC + '!\x00' # Normal text
TXT_2HEIGHT = ESC + '!\x10' # Double height text
TXT_2WIDTH = ESC + '!\x20' # Double width text

25
escpos/escpos.py
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@ -451,7 +451,7 @@ class Escpos(object):
colCount = self.columns if columns is None else columns
self.text(textwrap.fill(txt, colCount))
def set(self, align='left', font='a', text_type='normal', width=1, height=1, density=9, invert=False):
def set(self, align='left', font='a', text_type='normal', width=1, height=1, density=9, invert=False, smooth=False, flip=False):
""" Set text properties by sending them to the printer
:param align: horizontal position for text, possible values are:
@ -466,32 +466,43 @@ class Escpos(object):
* B for bold
* U for underlined
* B2 for bold, version 2
* U2 for underlined, version 2
* BU for bold and underlined
* BU2 for bold and underlined, version 2
* NORMAL for normal text
*default*: NORMAL
:param width: text width, normal (1) or double width (2), *default*: 1
:param height: text height, normal (1) or double height (2), *default*: 1
:param width: text width multiplier, decimal range 1-8, *default*: 1
:param height: text height multiplier, decimal range 1-8, *default*: 1
:param density: print density, value from 0-8, if something else is supplied the density remains unchanged
:param invert: True enables white on black printing, *default*: False
:param smooth: True enables text smoothing. Effective on 4x4 size text and larger, *default*: False
:param flip: True enables upside-down printing, *default*: False
:type invert: bool
"""
# Width
if height == 2 and width == 2:
self._raw(TXT_NORMAL)
self._raw(TXT_4SQUARE)
elif height == 2 and width != 2:
elif height == 2 and width == 1:
self._raw(TXT_NORMAL)
self._raw(TXT_2HEIGHT)
elif width == 2 and height != 2:
elif width == 2 and height == 1:
self._raw(TXT_NORMAL)
self._raw(TXT_2WIDTH)
else: # DEFAULT SIZE: NORMAL
elif width == 1 and height == 1:
self._raw(TXT_NORMAL)
else:
self._raw(TXT_SIZE + chr(TXT_WIDTH[width] + TXT_HEIGHT[height]))
# Type
if flip == True:
self._raw(TXT_FLIP_ON)
else:
self._raw(TXT_FLIP_OFF)
if smooth == True:
self._raw(TXT_SMOOTH_ON)
else:
self._raw(TXT_SMOOTH_OFF)
if text_type.upper() == "B":
self._raw(TXT_BOLD_ON)
self._raw(TXT_UNDERL_OFF)