181 lines
5.7 KiB
Go
181 lines
5.7 KiB
Go
package main
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import (
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"image"
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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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"github.com/kenshaw/escpos/raster"
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)
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// var ditherers []dither.Dither = []dither.Dither{
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// dither.Dither{
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// "FloydSteinberg",
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// dither.Settings{
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// [][]float32{
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// []float32{0.0, 0.0, 0.0, 7.0 / 48.0, 5.0 / 48.0},
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// []float32{3.0 / 48.0, 5.0 / 48.0, 7.0 / 48.0, 5.0 / 48.0, 3.0 / 48.0},
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// []float32{1.0 / 48.0, 3.0 / 48.0, 5.0 / 48.0, 3.0 / 48.0, 1.0 / 48.0},
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// },
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// },
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// },
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// dither.Dither{
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// "Stucki",
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// dither.Settings{
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// [][]float32{
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// []float32{0.0, 0.0, 0.0, 8.0 / 42.0, 4.0 / 42.0},
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// []float32{2.0 / 42.0, 4.0 / 42.0, 8.0 / 42.0, 4.0 / 42.0, 2.0 / 42.0},
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// []float32{1.0 / 42.0, 2.0 / 42.0, 4.0 / 42.0, 2.0 / 42.0, 1.0 / 42.0},
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// },
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// },
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// },
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// dither.Dither{
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// "Atkinson",
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// dither.Settings{
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// [][]float32{
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// []float32{0.0, 0.0, 1.0 / 8.0, 1.0 / 8.0},
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// []float32{1.0 / 8.0, 1.0 / 8.0, 1.0 / 8.0, 0.0},
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// []float32{0.0, 1.0 / 8.0, 0.0, 0.0},
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// },
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// },
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// },
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// dither.Dither{
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// "Burkes",
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// dither.Settings{
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// [][]float32{
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// []float32{0.0, 0.0, 0.0, 8.0 / 32.0, 4.0 / 32.0},
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// []float32{2.0 / 32.0, 4.0 / 32.0, 8.0 / 32.0, 4.0 / 32.0, 2.0 / 32.0},
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// []float32{0.0, 0.0, 0.0, 0.0, 0.0},
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// },
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// },
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// },
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// dither.Dither{
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// "Sierra-3",
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// dither.Settings{
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// [][]float32{
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// []float32{0.0, 0.0, 0.0, 5.0 / 32.0, 3.0 / 32.0},
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// []float32{2.0 / 32.0, 4.0 / 32.0, 5.0 / 32.0, 4.0 / 32.0, 2.0 / 32.0},
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// []float32{0.0, 2.0 / 32.0, 3.0 / 32.0, 2.0 / 32.0, 0.0},
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// },
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// },
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// },
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// dither.Dither{
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// "Sierra-2",
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// dither.Settings{
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// [][]float32{
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// []float32{0.0, 0.0, 0.0, 4.0 / 16.0, 3.0 / 16.0},
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// []float32{1.0 / 16.0, 2.0 / 16.0, 3.0 / 16.0, 2.0 / 16.0, 1.0 / 16.0},
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// []float32{0.0, 0.0, 0.0, 0.0, 0.0},
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// },
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// },
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// },
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// dither.Dither{
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// "Sierra-Lite",
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// dither.Settings{
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// [][]float32{
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// []float32{0.0, 0.0, 2.0 / 4.0},
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// []float32{1.0 / 4.0, 1.0 / 4.0, 0.0},
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// []float32{0.0, 0.0, 0.0},
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// },
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// },
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// },
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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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// m = 0 - 13 : slowest - fastest version V
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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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//load image
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imagef, err := os.Open("kia.png")
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if err != nil {
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panic(err)
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}
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defer imagef.Close()
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img, _, err := image.Decode(imagef)
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ep := escpos.New(f)
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ep.Init()
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ep.WriteRaw(pageWidth(int(math.Round((29.0 / 80.0) * 512))))
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ep.WriteRaw(pageMargin(1))
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ep.WriteRaw(printSpeed(13))
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// ditherer := ditherers[1]
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// log.Println("Using ditherer type: " + ditherer.Type)
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// dg := ditherer.Monochrome(img, 1.18)
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rasterConv := &raster.Converter{
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MaxWidth: 186, // == math.Round((29.0 / 80.0) * 512)) == 29mm sticker roll
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Threshold: 0.1, //pre-dithered images are black or white anyway, so this can be extremely low as there won't be any in-between colors (default: 0.5)
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}
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for i := 0; i < 2; i++ {
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rasterConv.Print(img, ep)
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ep.Cut()
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}
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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.End()
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}
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