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173 lines
6.5 KiB
173 lines
6.5 KiB
import sys
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import textwrap
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# Output a binary file which a ESCPOS thermal printer will understand
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# References:
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# - Command manual PDF, in this repository
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# - https://www.neodynamic.com/articles/How-to-print-raw-ESC-POS-commands-from-Javascript/
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outputFilename = "output.bin"
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esc = '\x1B'; # ESC byte in hex notation
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newLine = '\x0A'; # LF byte in hex notation
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# Emphasized + Double-height + Double-width mode selected (ESC ! (8 + 16 + 32)) 56 dec => 38 hex
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TextStyle_Large = '\x38'
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TextStyle_DoubleWidth = '\x20'
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TextStyle_RegularEmphasis = '\x08' # Regular size + emphasis (0 + 8)
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TextStyle_Regular = '\x00'
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# Format specifier, column width
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lineWrapColumns = {TextStyle_Large:16, TextStyle_DoubleWidth:16,
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TextStyle_RegularEmphasis:32, TextStyle_Regular:32}
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gOutputBuffer = ''
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gCurrentTextStyle = TextStyle_Regular
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def writeOutputBuffer():
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global gOutputBuffer
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encodedString = gOutputBuffer.encode("ascii")
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# I think the printer needs to be told this is the desired format
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# encodedString = gOutputBuffer.encode("gb18030")
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print("Outputting to {}".format(outputFilename))
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print("Use the following command (replacing [your printer]) to print:\n"
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"lpr -P [your printer] output.bin")
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outFile = open(outputFilename, "wb")
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outFile.write(encodedString)
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outFile.close()
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def setTextStyle(styleSpecifier):
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global gCurrentTextStyle
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if styleSpecifier not in lineWrapColumns:
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print("Warning: style specifier '{}' not fully supported".format(styleSpecifier))
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outputRaw(esc + '!' + styleSpecifier)
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gCurrentTextStyle = styleSpecifier
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def outputInitializationCode():
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# Initializes the printer (ESC @)
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outputRaw(esc + "@")
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setTextStyle(TextStyle_Regular)
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# Don't fix up newlines or anything
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def outputRaw(outString):
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global gOutputBuffer
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gOutputBuffer += outString
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# Wrap lines and convert newlines to the appropriate format character
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# TODO: Make empty lines newlines still show up instead of being removed by this
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def outputTextBlock(outString):
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global gOutputBuffer
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wrapWidth = lineWrapColumns[gCurrentTextStyle]
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# Fix newlines and wrap
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# lines = outString.replace('\n', newLine).split(newLine)
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# We will be adding this newline later, and it will just confuse the splitter.
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if outString[-1] == '\n':
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outString = outString[:-1]
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lines = outString.split("\n")
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wrappedLines = []
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for line in lines:
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if not line:
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wrappedLines.append('')
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wrappedLines += textwrap.wrap(line, width=wrapWidth)
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# exit()
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for line in wrappedLines:
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if line:
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gOutputBuffer += line + newLine
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else:
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gOutputBuffer += newLine
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def lineHasTagExactly(line, tag):
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return len(line) >= len(tag) and tag in line[:len(tag)]
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def lineGetTaggedValue(line, tag):
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return line[len(tag):]
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def orgModeToEscPos(orgLines):
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for line in orgLines:
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if lineHasTagExactly(line, '#+TITLE:'):
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setTextStyle(TextStyle_Large)
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outputTextBlock("\n" + lineGetTaggedValue(line, '#+TITLE:'))
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# Headings
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elif lineHasTagExactly(line, '* '):
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setTextStyle(TextStyle_DoubleWidth)
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outputTextBlock("\n" + lineGetTaggedValue(line, '* '))
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elif lineHasTagExactly(line, '** '):
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setTextStyle(TextStyle_RegularEmphasis)
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outputTextBlock("\n" + lineGetTaggedValue(line, '** '))
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# All deeper headings are just bolded and have a space at the start
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elif len(line) > 2 and line[0] == "*" and line[1] == "*":
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setTextStyle(TextStyle_RegularEmphasis)
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outputTextBlock("\n" + line[line.find(" "):])
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# Body text
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else:
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setTextStyle(TextStyle_Regular)
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outputTextBlock(line)
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def main(filenameToConvert):
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outputInitializationCode()
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orgFile = open(filenameToConvert, "r")
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orgLines = orgFile.readlines()
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orgFile.close()
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orgModeToEscPos(orgLines)
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writeOutputBuffer()
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return
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# Bit image mode (doesn't work)
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# outputRaw(esc + '*' + TextStyle_Regular + TextStyle_RegularEmphasis + TextStyle_RegularEmphasis +
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# '\x08\x00\x08\x08\x00\x08\x00\x08' +
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# '\x08\x00\x08\x08\x00\x08\x00\x08' +
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# '\x08\x00\x08\x08\x00\x08\x00\x08' +
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# '\x08\x00\x08\x08\x00\x08\x00\x08' +
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# '\x08\x00\x08\x08\x00\x08\x00\x08')
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# outputRaw('\x1D' + '\x2A' + TextStyle_DoubleWidth + TextStyle_DoubleWidth + TextStyle_RegularEmphasis +
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# '\x08\x00\x08\x08\x00\x08\x00\x08' +
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# '\x08\x00\x08\x08\x00\x08\x00\x08' +
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# '\x08\x00\x08\x08\x00\x08\x00\x08' +
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# '\x08\x00\x08\x08\x00\x08\x00\x08' +
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# '\x08\x00\x08\x08\x00\x08\x00\x08')
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# Style showcase (won't work properly anymore)
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# outputRaw( esc + '!' + TextStyle_Regular) #Regular size
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# outputTextBlock(journalString)
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# Emphasized + Double-height + Double-width mode selected (ESC ! (8 + 16 + 32)) 56 dec => 38 hex
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# outputRaw( esc + '!' + TextStyle_Large)
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# outputTextBlock("cookies and milk")
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# outputRaw( esc + '!' + '\x01') # Small size
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# outputTextBlock("Small cookies and milk")
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# outputRaw( esc + '!' + '\x09') # Small size + emphasis (1 + 8)
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# outputTextBlock("Small cookies and milk?")
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# outputRaw( esc + '!' + '\x10') # Double height regular
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# outputTextBlock("Tall text")
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# outputRaw( esc + '!' + '\x11') # Double height small
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# outputTextBlock("Small tall text")
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# outputRaw( esc + '!' + TextStyle_DoubleWidth) # Double width regular
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# outputTextBlock("Double width regular")
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# outputRaw( esc + '-') # Double width small underline (20h + 80h + 1h)
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# outputTextBlock("Double width regular underline?")
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# Something about this confuses my printer such that it starts printing corrupt data
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# From package escpos
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# escposStrOutputter = printer.Dummy()
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# It does not actually support Japanese like this
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# escposStrOutputter.text("このは、テストです。素晴しいですね。\n")
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# escposStrOutputter.text(journalString)
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# escposStrOutputter.image("test384.png")
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# print(escposStrOutputter.output)
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# outputRaw(escposStrOutputter.output)
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# outFile = open("output.bin", "wb")
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# outFile.write(escposStrOutputter.output)
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# outFile.close()
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if __name__ == "__main__":
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if len(sys.argv) != 2:
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print("Org Mode to ESCPOS\nUsage:\n\tpython3 ThermalPrinterConverter.py MyDoc.org")
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sys.exit(1)
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else:
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main(sys.argv[1])
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