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Move printer stuff into the ql package

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This commit is contained in:
Přemysl Eric Janouch
2019-04-12 21:50:36 +02:00
parent b763c2d362
commit 4c2f29384d
3 changed files with 344 additions and 408 deletions
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254
label-exp/main.go
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@@ -7,12 +7,10 @@ import (
"image/color"
"image/draw"
"image/png"
"io"
"log"
"net/http"
"os"
"strconv"
"time"
"github.com/boombuler/barcode"
"github.com/boombuler/barcode/qr"
@@ -74,218 +72,6 @@ func (lr *leftRotate) At(x, y int) color.Color {
// -----------------------------------------------------------------------------
func decodeBitfieldErrors(b byte, errors [8]string) []string {
var result []string
for i := uint(0); i < 8; i++ {
if b&(1<<i) != 0 {
result = append(result, errors[i])
}
}
return result
}
func printStatusInformation(d []byte) {
log.Println("-- status")
// Error information 1.
for _, e := range decodeBitfieldErrors(d[8], [8]string{
"no media", "end of media", "cutter jam", "?", "printer in use",
"printer turned off", "high-voltage adapter", "fan motor error"}) {
log.Println("error:", e)
}
// Error information 2.
for _, e := range decodeBitfieldErrors(d[9], [8]string{
"replace media", "expansion buffer full", "communication error",
"communication buffer full", "cover open", "cancel key",
"media cannot be fed", "system error"}) {
log.Println("error:", e)
}
// Media width.
log.Println("media width:", d[10], "mm")
// Media type.
switch b := d[11]; b {
case 0x00:
log.Println("media: no media")
case 0x4a, 0x0a: // 0x4a = J, in reality we get 0x0a as in QL-1100 docs
log.Println("media: continuous length tape")
case 0x4b, 0x0b: // 0x4b = K, in reality we get 0x0b as in QL-1100 docs
log.Println("media: die-cut labels")
default:
log.Println("media:", b)
}
// Mode.
log.Println("mode:", d[15])
// Media length.
log.Println("media length:", d[17], "mm")
// Status type.
switch b := d[18]; b {
case 0x00:
log.Println("status type: reply to status request")
case 0x01:
log.Println("status type: printing completed")
case 0x02:
log.Println("status type: error occurred")
case 0x04:
log.Println("status type: turned off")
case 0x05:
log.Println("status type: notification")
case 0x06:
log.Println("status type: phase change")
default:
log.Println("status type:", b)
}
// Phase type.
switch b := d[19]; b {
case 0x00:
log.Println("phase state: receiving state")
case 0x01:
log.Println("phase state: printing state")
default:
log.Println("phase state:", b)
}
// Phase number.
log.Println("phase number:", int(d[20])*256+int(d[21]))
// Notification number.
switch b := d[22]; b {
case 0x00:
log.Println("notification number: not available")
case 0x03:
log.Println("notification number: cooling (started)")
case 0x04:
log.Println("notification number: cooling (finished)")
default:
log.Println("notification number:", b)
}
}
// genLabelData converts an image to the printer's raster format.
func genLabelData(src image.Image, offset, length int) (data []byte) {
bounds := src.Bounds()
pixels := make([]bool, 720)
for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
length--
if length <= 0 {
break
}
off := offset
for x := bounds.Max.X - 1; x >= bounds.Min.X; x-- {
// TODO: Anything to do with the ColorModel?
r, g, b, a := src.At(x, y).RGBA()
pixels[off] = r == 0 && g == 0 && b == 0 && a != 0
off++
}
data = append(data, 'g', 0x00, 90)
for i := 0; i < 90; i++ {
var b byte
for j := 0; j < 8; j++ {
b <<= 1
if pixels[i*8+j] {
b |= 1
}
}
data = append(data, b)
}
}
for ; length > 0; length-- {
data = append(data, 'g', 0x00, 90)
data = append(data, make([]byte, 90)...)
}
return
}
func printLabel(printer *ql.Printer, src image.Image,
status *ql.Status, mediaInfo *ql.MediaInfo) error {
data := []byte(nil)
// Raster mode.
// Should be the only supported mode for QL-800.
data = append(data, 0x1b, 0x69, 0x61, 0x01)
// Automatic status mode (though it's the default).
data = append(data, 0x1b, 0x69, 0x21, 0x00)
// Print information command.
dy := src.Bounds().Dy()
if mediaInfo.PrintAreaLength != 0 {
dy = mediaInfo.PrintAreaLength
}
mediaType := byte(0x0a)
if status.MediaLengthMM != 0 {
mediaType = byte(0x0b)
}
data = append(data, 0x1b, 0x69, 0x7a, 0x02|0x04|0x40|0x80, mediaType,
byte(status.MediaWidthMM), byte(status.MediaLengthMM),
byte(dy), byte(dy>>8), byte(dy>>16), byte(dy>>24), 0, 0x00)
// Auto cut, each 1 label.
data = append(data, 0x1b, 0x69, 0x4d, 0x40)
data = append(data, 0x1b, 0x69, 0x41, 0x01)
// Cut at end (though it's the default).
// Not sure what it means, doesn't seem to have any effect to turn it off.
data = append(data, 0x1b, 0x69, 0x4b, 0x08)
if status.MediaLengthMM != 0 {
// 3mm margins along the direction of feed. 0x23 = 35 dots, the minimum.
data = append(data, 0x1b, 0x69, 0x64, 0x23, 0x00)
} else {
// May not set anything other than zero.
data = append(data, 0x1b, 0x69, 0x64, 0x00, 0x00)
}
// Compression mode: no compression.
// Should be the only supported mode for QL-800.
data = append(data, 0x4d, 0x00)
// The graphics data itself.
data = append(data, genLabelData(src, mediaInfo.SideMarginPins, dy)...)
// Print command with feeding.
data = append(data, 0x1a)
// ---
// Print the prepared data.
if _, err := printer.File.Write(data); err != nil {
return err
}
// TODO: We specifically need to wait for a transition to the receiving
// state, and try to figure out something from the statuses.
// We may also receive an error status instead of the transition to
// the printing state. Or even after it.
start, b := time.Now(), make([]byte, 32)
for {
if time.Now().Sub(start) > 3*time.Second {
break
}
if n, err := printer.File.Read(b); err == io.EOF {
time.Sleep(100 * time.Millisecond)
} else if err != nil {
return err
} else if n < 32 {
return errors.New("invalid read")
} else {
printStatusInformation(b)
}
}
return nil
}
// -----------------------------------------------------------------------------
var font *bdf.Font
func genLabelForHeight(text string, height, scale int) image.Image {
@@ -339,9 +125,9 @@ var tmpl = template.Must(template.New("form").Parse(`
<p>Printer: {{ .Printer.Manufacturer }} {{ .Printer.Model }}
<p>Tape:
{{ if .Status }}
{{ .Status.MediaWidthMM }} mm &times;
{{ .Status.MediaLengthMM }} mm
{{ if .Printer.LastStatus }}
{{ .Printer.LastStatus.MediaWidthMM }} mm &times;
{{ .Printer.LastStatus.MediaLengthMM }} mm
{{ if .MediaInfo }}
(offset: {{ .MediaInfo.SideMarginPins }} pt,
@@ -350,8 +136,8 @@ var tmpl = template.Must(template.New("form").Parse(`
(unknown media)
{{ end }}
{{ if .Status.Errors }}
{{ range .Status.Errors }}
{{ if .Printer.LastStatus.Errors }}
{{ range .Printer.LastStatus.Errors }}
<p>Error: {{ . }}
{{ end }}
{{ end }}
@@ -389,16 +175,15 @@ func getPrinter() (*ql.Printer, error) {
return printer, nil
}
func getStatus(printer *ql.Printer) (*ql.Status, error) {
func getStatus(printer *ql.Printer) error {
if err := printer.Initialize(); err != nil {
return nil, err
return err
}
if data, err := printer.GetStatus(); err != nil {
return nil, err
} else {
printStatusInformation(data)
return ql.DecodeStatus(data), nil
if err := printer.UpdateStatus(); err != nil {
return err
}
log.Printf("status\n%s", printer.LastStatus)
return nil
}
func handle(w http.ResponseWriter, r *http.Request) {
@@ -407,25 +192,22 @@ func handle(w http.ResponseWriter, r *http.Request) {
return
}
var (
status *ql.Status
initErr error
)
var initErr error
printer, printerErr := getPrinter()
if printerErr == nil {
defer printer.Close()
status, initErr = getStatus(printer)
initErr = getStatus(printer)
}
var mediaInfo *ql.MediaInfo
if status != nil {
mediaInfo = ql.GetMediaInfo(status.MediaWidthMM, status.MediaLengthMM)
if printer.LastStatus != nil {
mediaInfo = ql.GetMediaInfo(printer.LastStatus.MediaWidthMM(),
printer.LastStatus.MediaLengthMM())
}
var params = struct {
Printer *ql.Printer
PrinterErr error
Status *ql.Status
InitErr error
MediaInfo *ql.MediaInfo
Text string
@@ -433,7 +215,6 @@ func handle(w http.ResponseWriter, r *http.Request) {
}{
Printer: printer,
PrinterErr: printerErr,
Status: status,
InitErr: initErr,
MediaInfo: mediaInfo,
Text: r.FormValue("text"),
@@ -450,8 +231,7 @@ func handle(w http.ResponseWriter, r *http.Request) {
label = &leftRotate{image: genLabelForHeight(
params.Text, mediaInfo.PrintAreaPins, params.Scale)}
if r.FormValue("print") != "" {
if err := printLabel(
printer, label, status, mediaInfo); err != nil {
if err := printer.Print(label); err != nil {
log.Println("print error:", err)
}
}