forked from mattronix/escpos-go-labels
97 lines
3.3 KiB
Go
97 lines
3.3 KiB
Go
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package main
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import (
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_ "image/jpeg"
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_ "image/png" //I'm needed
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"math"
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"os"
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"github.com/kenshaw/escpos"
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)
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const ESC = byte(27)
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func pageWidth(widht int) []byte {
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return []byte{escpos.GS, 87, byte(widht), 0}
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}
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func pageMargin(margin int) []byte {
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return []byte{escpos.GS, 76, byte(margin), 0}
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}
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func pageMode() []byte {
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return []byte{ESC, 'L'}
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}
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func pageDirection(direction uint8) []byte {
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// https://www.epson-biz.com/modules/ref_escpos/index.php?content_id=55
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return []byte{ESC, 'T', direction}
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}
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func pagePrintArea(x, y, width, height int) []byte {
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return []byte{ESC, 'W',
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byte(x & 255), byte(x >> 8 & 255),
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byte(y & 255), byte(y >> 8 & 255),
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byte(width & 255), byte(width >> 8 & 255),
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byte(height & 255), byte(height >> 8 & 255)}
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}
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func offsetY(offset int) []byte {
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// A positive number specifies movement downward, and a negative number specifies movement upward.
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// The horizontal or vertical motion unit is used for the print direction set by ESC T.
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// When the starting position is set to the upper left or lower right of the print area using ESC T, the vertical motion unit is used.
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// When the starting position is set to the upper right or lower left of the print area using ESC T, the horizontal motion unit is used.
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return []byte{escpos.GS, '\\', byte(offset & 255), byte(offset >> 8 & 255)}
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}
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func offsetX(offset int) []byte {
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// A positive number specifies movement to the right, and a negative number specifies movement to the left.
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// When Standard mode is selected, the horizontal motion unit is used.
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// when Page mode is selected, the horizontal or vertical motion unit is used for the print direction set by ESC T.
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// When the starting position is set to the upper left or lower right of the print area using ESC T, the horizontal motion unit is used.
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// When the starting position is set to the upper right or lower left of the print area using ESC T, the vertical motion unit is used.
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return []byte{ESC, '\\', byte(offset & 255), byte(offset >> 8 & 255)}
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}
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func invert(n int) []byte {
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//When the LSB of n is 0, white/black reverse print mode is turned off.
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//n = 0 – 255
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return []byte{escpos.GS, byte('B'), byte(n)}
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}
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func disableSensors() []byte {
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return []byte{ESC, 'c', '3', 0}
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}
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func printSpeed(m int) []byte {
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// m = 0 – 9, 48 – 57 : slowest - fastest
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// [Default] 0 = Setting value of GS ( E <Function 5> customize value (a = 6)
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// m = 0
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//Slower print speed seems to retain a bit more quality in dithered images. pure B/W images do not have a noticable difference
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return []byte{escpos.GS, '(', 'K', 2, 0, 50, byte(m & 255), byte(m >> 8 & 255)}
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}
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func main() {
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f, err := os.OpenFile("/dev/usb/lp0", os.O_WRONLY|os.O_CREATE, 0)
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if err != nil {
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panic(err)
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}
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defer f.Close()
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ep := escpos.New(f)
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ep.Init()
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ep.WriteRaw(pageMode())
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ep.WriteRaw(pageDirection(1))
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ep.WriteRaw(pagePrintArea(0, 0, int(math.Round((29.0/80.0)*512)), 850))
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ep.WriteRaw(offsetY(30))
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ep.SetFontSize(1,1)
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ep.Write("Technologia Incognita\n")
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ep.WriteRaw(offsetY(35))
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ep.SetFontSize(3,2)
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ep.SetEmphasize(1)
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ep.Write("Do Not Hack\n")
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ep.SetEmphasize(0)
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ep.WriteRaw(offsetY(15))
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ep.SetFontSize(1,1)
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ep.Write("Mattronix - 2023-10-14 \n")
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ep.WriteRaw([]byte{12}) // FF: in Page mode, prints all the data in the print buffer collectively and switches from Page mode to Standard mode.
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//ep.Formfeed()
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ep.Cut()
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ep.End()
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}
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