mugli/png2escpos

Quickly convert PNG files to ESC/POS format, for printing on Epson thermal point-of-sale printers. Written in Go/Golang

png2escpos

Quickly convert PNG files to ESC/POS format, for printing on Epson thermal point-of-sale printers.

This utility removes transparency from image, makes it grayscale and then encodes in ESC/POS format.

Written in pure Go/Golang.

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Installation

Download binary from release tab.

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Usage

./png2escpos <filename.png>:
	Binary output in ESC/POS format will be written directly to stdout.

	You can pipe this output directly into an Epson compatible thermal printer with:
		Linux:	./png2escpos <file.png> > /dev/usb/lp0
		macOS:	./png2escpos <file.png> | lpr -P NAME_OF_PRINTER

		Or, if you have a network printer listening at 192.168.1.100:9100
			you can use socat to forward from stdin to network like this:

			Linux:	./png2escpos <file.png> | socat STDIN TCP4:192.168.1.100:9100
			macOS:	./png2escpos <file.png> | socat STDIN TCP4:192.168.1.100:9100

			(you may have to install socat on macOS with brew install socat first)

Other commands:

	help, --help, -h:
		Shows this message

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Acknowledgement

NielsLeenheer/EscPosEncoder - For the rasterization and ESC/POS encoding in JavaScript.

twg/png2escpos - For CLI usage pattern.

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License

MIT

png2escpos's Issues

Variable usage error

png2escpos/escpos/raster.go

Line 37 in 56fca74

byte((width>>3)&0xff),

Replace width with printWidth
Replace height with printHeight

Embed version info and add flag