Initial commit
This commit is contained in:
93
bdf-preview/main.go
Normal file
93
bdf-preview/main.go
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@@ -0,0 +1,93 @@
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package main
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import (
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"html/template"
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"image"
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"image/draw"
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"image/png"
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"log"
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"net/http"
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"os"
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"janouch.name/sklad/bdf"
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)
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type fontItem struct {
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Font *bdf.Font
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Preview image.Image
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}
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var fonts = map[string]fontItem{}
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var tmpl = template.Must(template.New("list").Parse(`
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<!DOCTYPE html>
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<html><body>
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<table border='1' cellpadding='3' style='border-collapse: collapse'>
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<tr>
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<th>Name</th>
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<th>Preview</th>
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<tr>
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{{range $k, $v := . }}
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<tr>
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<td>{{$k}}</td>
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<td><img src='?name={{$k}}'></td>
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</tr>
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{{end}}
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</table>
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</body></html>
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`))
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func handle(w http.ResponseWriter, r *http.Request) {
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if err := r.ParseForm(); err != nil {
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http.Error(w, err.Error(), 500)
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return
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}
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name := r.FormValue("name")
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if name == "" {
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w.Header().Set("Content-Type", "text/html")
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tmpl.Execute(w, fonts)
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return
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}
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item, ok := fonts[name]
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if !ok {
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http.Error(w, "No such font.", 400)
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return
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}
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w.Header().Set("Content-Type", "image/png")
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if err := png.Encode(w, item.Preview); err != nil {
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http.Error(w, err.Error(), 500)
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return
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}
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}
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func main() {
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for _, filename := range os.Args[1:] {
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fi, err := os.Open(filename)
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if err != nil {
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log.Fatalln(err)
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}
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font, err := bdf.NewFromBDF(fi)
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if err != nil {
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log.Fatalf("%s: %s\n", filename, err)
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}
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if err := fi.Close(); err != nil {
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log.Fatalln(err)
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}
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r, _ := font.BoundString(font.Name)
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super := r.Inset(-3)
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img := image.NewRGBA(super)
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draw.Draw(img, super, image.White, image.ZP, draw.Src)
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font.DrawString(img, image.ZP, font.Name)
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fonts[filename] = fontItem{Font: font, Preview: img}
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}
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log.Println("Starting server")
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http.HandleFunc("/", handle)
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log.Fatal(http.ListenAndServe(":8080", nil))
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}
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41
bdf-sample/main.go
Normal file
41
bdf-sample/main.go
Normal file
@@ -0,0 +1,41 @@
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package main
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import (
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"image"
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"image/draw"
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"image/png"
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"janouch.name/sklad/bdf"
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"log"
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"os"
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)
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func main() {
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fi, err := os.Open(os.Args[1])
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if err != nil {
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log.Fatalln(err)
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}
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defer fi.Close()
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font, err := bdf.NewFromBDF(fi)
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if err != nil {
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log.Fatalln(err)
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}
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r, _ := font.BoundString(font.Name)
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super := r.Inset(-20)
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img := image.NewRGBA(super)
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draw.Draw(img, super, image.White, image.ZP, draw.Src)
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font.DrawString(img, image.ZP, font.Name)
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fo, err := os.Create("out.png")
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if err != nil {
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log.Fatalln(err)
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}
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if err := png.Encode(fo, img); err != nil {
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fo.Close()
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log.Fatal(err)
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}
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if err := fo.Close(); err != nil {
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log.Fatal(err)
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}
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}
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353
bdf/bdf.go
Normal file
353
bdf/bdf.go
Normal file
@@ -0,0 +1,353 @@
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package bdf
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import (
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"bufio"
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"encoding/hex"
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"fmt"
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"image"
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"image/color"
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"image/draw"
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"io"
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"strconv"
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)
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// glyph is a singular bitmap glyph to be used as a mask, assumed to directly
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// correspond to a rune. A zero value is also valid and drawable.
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type glyph struct {
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// Coordinates are relative to the origin, on the baseline.
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// The ascent is thus negative, unlike the usual model.
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bounds image.Rectangle
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bitmap []byte
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advance int
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}
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// ColorModel implements image.Image.
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func (g *glyph) ColorModel() color.Model { return color.Alpha16Model }
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// Bounds implements image.Image.
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func (g *glyph) Bounds() image.Rectangle { return g.bounds }
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// At implements image.Image. This is going to be somewhat slow.
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func (g *glyph) At(x, y int) color.Color {
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x -= g.bounds.Min.X
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y -= g.bounds.Min.Y
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dx, dy := g.bounds.Dx(), g.bounds.Dy()
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if x < 0 || y < 0 || x >= dx || y >= dy {
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return color.Transparent
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}
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stride, offset, bit := (dx+7)/8, x/8, byte(1<<uint(7-x%8))
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if g.bitmap[y*stride+offset]&bit == 0 {
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return color.Transparent
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}
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return color.Opaque
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}
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// -----------------------------------------------------------------------------
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// Font represents a particular bitmap font.
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type Font struct {
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Name string
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glyphs map[rune]glyph
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fallback glyph
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}
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// FindGlyph returns the best glyph to use for the given rune.
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// The returned boolean indicates whether a fallback has been used.
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func (f *Font) FindGlyph(r rune) (glyph, bool) {
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if g, ok := f.glyphs[r]; ok {
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return g, true
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}
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return f.fallback, false
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}
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// DrawString draws the specified text string onto dst horizontally along
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// the baseline starting at dp, using black color.
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func (f *Font) DrawString(dst draw.Image, dp image.Point, s string) {
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for _, r := range s {
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g, _ := f.FindGlyph(r)
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draw.DrawMask(dst, g.bounds.Add(dp),
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image.Black, image.ZP, &g, g.bounds.Min, draw.Over)
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dp.X += g.advance
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}
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}
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// BoundString measures the text's bounds when drawn along the X axis
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// for the baseline. Also returns the total advance.
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func (f *Font) BoundString(s string) (image.Rectangle, int) {
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var (
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bounds image.Rectangle
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dot image.Point
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)
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for _, r := range s {
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g, _ := f.FindGlyph(r)
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bounds = bounds.Union(g.bounds.Add(dot))
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dot.X += g.advance
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}
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return bounds, dot.X
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}
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// -----------------------------------------------------------------------------
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func latin1ToUTF8(latin1 []byte) string {
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buf := make([]rune, len(latin1))
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for i, b := range latin1 {
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buf[i] = rune(b)
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}
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return string(buf)
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}
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// tokenize splits a BDF line into tokens. Quoted strings may start anywhere
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// on the line. We only enforce that they must end somewhere.
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func tokenize(s string) (tokens []string, err error) {
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token, quotes, escape := []rune{}, false, false
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for _, r := range s {
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switch {
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case escape:
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switch r {
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case '"':
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escape = false
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token = append(token, r)
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case ' ', '\t':
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quotes, escape = false, false
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tokens = append(tokens, string(token))
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token = nil
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default:
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quotes, escape = false, false
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token = append(token, r)
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}
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case quotes:
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switch r {
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case '"':
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escape = true
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default:
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token = append(token, r)
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}
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default:
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switch r {
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case '"':
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// We could also enable quote processing on demand,
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// so that it is only turned on in properties.
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if len(tokens) < 1 || tokens[0] != "COMMENT" {
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quotes = true
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} else {
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token = append(token, r)
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}
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case ' ', '\t':
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if len(token) > 0 {
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tokens = append(tokens, string(token))
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token = nil
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}
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default:
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token = append(token, r)
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}
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}
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}
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if quotes && !escape {
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return nil, fmt.Errorf("strings may not contain newlines")
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}
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if quotes || len(token) > 0 {
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tokens = append(tokens, string(token))
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}
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return tokens, nil
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}
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// -----------------------------------------------------------------------------
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// bdfParser is a basic and rather lenient parser of
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// Bitmap Distribution Format (BDF) files.
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type bdfParser struct {
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scanner *bufio.Scanner // input reader
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line int // current line number
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tokens []string // tokens on the current line
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font *Font // glyph storage
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defaultBounds image.Rectangle
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defaultAdvance int
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defaultChar int
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}
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// readLine reads the next line and splits it into tokens.
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// Panics on error, returns false if the end of file has been reached normally.
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func (p *bdfParser) readLine() bool {
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p.line++
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if !p.scanner.Scan() {
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if err := p.scanner.Err(); err != nil {
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panic(err)
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}
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p.line--
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return false
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}
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var err error
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if p.tokens, err = tokenize(latin1ToUTF8(p.scanner.Bytes())); err != nil {
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panic(err)
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}
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// Eh, it would be nicer iteratively, this may overrun the stack.
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if len(p.tokens) == 0 {
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return p.readLine()
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}
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return true
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}
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func (p *bdfParser) readCharEncoding() int {
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if len(p.tokens) < 2 {
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panic("insufficient arguments")
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}
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if i, err := strconv.Atoi(p.tokens[1]); err != nil {
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panic(err)
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} else {
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return i // Some fonts even use -1 for things outside the encoding.
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}
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}
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func (p *bdfParser) parseProperties() {
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// The wording in the specification suggests that the argument
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// with the number of properties to follow isn't reliable.
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for p.readLine() && p.tokens[0] != "ENDPROPERTIES" {
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switch p.tokens[0] {
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case "DEFAULT_CHAR":
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p.defaultChar = p.readCharEncoding()
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}
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}
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}
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// XXX: Ignoring vertical advance since we only expect purely horizontal fonts.
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func (p *bdfParser) readDwidth() int {
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if len(p.tokens) < 2 {
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panic("insufficient arguments")
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}
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if i, err := strconv.Atoi(p.tokens[1]); err != nil {
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panic(err)
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} else {
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return i
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}
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}
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func (p *bdfParser) readBBX() image.Rectangle {
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if len(p.tokens) < 5 {
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panic("insufficient arguments")
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}
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w, e1 := strconv.Atoi(p.tokens[1])
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h, e2 := strconv.Atoi(p.tokens[2])
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x, e3 := strconv.Atoi(p.tokens[3])
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y, e4 := strconv.Atoi(p.tokens[4])
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if e1 != nil || e2 != nil || e3 != nil || e4 != nil {
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panic("invalid arguments")
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}
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if w < 0 || h < 0 {
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panic("bounding boxes may not have negative dimensions")
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}
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return image.Rectangle{
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Min: image.Point{x, -(y + h)},
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Max: image.Point{x + w, -y},
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}
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}
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func (p *bdfParser) parseChar() {
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g := glyph{bounds: p.defaultBounds, advance: p.defaultAdvance}
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bitmap, rows, encoding := false, 0, -1
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for p.readLine() && p.tokens[0] != "ENDCHAR" {
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if bitmap {
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b, err := hex.DecodeString(p.tokens[0])
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if err != nil {
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panic(err)
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}
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if len(b) != (g.bounds.Dx()+7)/8 {
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panic("invalid bitmap data, width mismatch")
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}
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g.bitmap = append(g.bitmap, b...)
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rows++
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} else {
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switch p.tokens[0] {
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case "ENCODING":
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encoding = p.readCharEncoding()
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case "DWIDTH":
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g.advance = p.readDwidth()
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case "BBX":
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g.bounds = p.readBBX()
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case "BITMAP":
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bitmap = true
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}
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}
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}
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if rows != g.bounds.Dy() {
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panic("invalid bitmap data, height mismatch")
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}
|
||||
|
||||
// XXX: We don't try to convert encodings, since we'd need x/text/encoding
|
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// for the conversion tables, though most fonts are at least going to use
|
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// supersets of ASCII. Use ISO10646-1 X11 fonts for proper Unicode support.
|
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if encoding >= 0 {
|
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p.font.glyphs[rune(encoding)] = g
|
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}
|
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if encoding == p.defaultChar {
|
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p.font.fallback = g
|
||||
}
|
||||
}
|
||||
|
||||
// https://en.wikipedia.org/wiki/Glyph_Bitmap_Distribution_Format
|
||||
// https://www.adobe.com/content/dam/acom/en/devnet/font/pdfs/5005.BDF_Spec.pdf
|
||||
func (p *bdfParser) parse() {
|
||||
if !p.readLine() || len(p.tokens) != 2 || p.tokens[0] != "STARTFONT" {
|
||||
panic("invalid header")
|
||||
}
|
||||
if p.tokens[1] != "2.1" && p.tokens[1] != "2.2" {
|
||||
panic("unsupported version number")
|
||||
}
|
||||
for p.readLine() && p.tokens[0] != "ENDFONT" {
|
||||
switch p.tokens[0] {
|
||||
case "FONT":
|
||||
if len(p.tokens) < 2 {
|
||||
panic("insufficient arguments")
|
||||
}
|
||||
p.font.Name = p.tokens[1]
|
||||
case "FONTBOUNDINGBOX":
|
||||
// There's no guarantee that this includes all BBXs.
|
||||
p.defaultBounds = p.readBBX()
|
||||
case "METRICSSET":
|
||||
if len(p.tokens) < 2 {
|
||||
panic("insufficient arguments")
|
||||
}
|
||||
if p.tokens[1] == "1" {
|
||||
panic("purely vertical fonts are unsupported")
|
||||
}
|
||||
case "DWIDTH":
|
||||
p.defaultAdvance = p.readDwidth()
|
||||
case "STARTPROPERTIES":
|
||||
p.parseProperties()
|
||||
case "STARTCHAR":
|
||||
p.parseChar()
|
||||
}
|
||||
}
|
||||
if p.font.Name == "" {
|
||||
panic("the font file doesn't contain the font's name")
|
||||
}
|
||||
if len(p.font.glyphs) == 0 {
|
||||
panic("the font file doesn't seem to contain any glyphs")
|
||||
}
|
||||
}
|
||||
|
||||
func NewFromBDF(r io.Reader) (f *Font, err error) {
|
||||
p := bdfParser{
|
||||
scanner: bufio.NewScanner(r),
|
||||
font: &Font{glyphs: make(map[rune]glyph)},
|
||||
defaultChar: -1,
|
||||
}
|
||||
defer func() {
|
||||
if r := recover(); r != nil {
|
||||
var ok bool
|
||||
if err, ok = r.(error); !ok {
|
||||
err = fmt.Errorf("%v", r)
|
||||
}
|
||||
}
|
||||
if err != nil {
|
||||
err = fmt.Errorf("line %d: %s", p.line, err)
|
||||
}
|
||||
}()
|
||||
|
||||
p.parse()
|
||||
return p.font, nil
|
||||
}
|
||||
207
brother-info/main.go
Normal file
207
brother-info/main.go
Normal file
@@ -0,0 +1,207 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"io"
|
||||
"log"
|
||||
"os"
|
||||
"time"
|
||||
)
|
||||
|
||||
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
|
||||
}
|
||||
|
||||
// -----------------------------------------------------------------------------
|
||||
|
||||
type brotherStatus struct {
|
||||
errors []string
|
||||
}
|
||||
|
||||
// TODO: What exactly do we need? Probably extend as needed.
|
||||
func decodeStatusInformation(d []byte) brotherStatus {
|
||||
var status brotherStatus
|
||||
status.errors = append(status.errors, decodeBitfieldErrors(d[8], [8]string{
|
||||
"no media", "end of media", "cutter jam", "?", "printer in use",
|
||||
"printer turned off", "high-voltage adapter", "fan motor error"})...)
|
||||
status.errors = append(status.errors, 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"})...)
|
||||
return status
|
||||
}
|
||||
|
||||
// -----------------------------------------------------------------------------
|
||||
|
||||
func printStatusInformation(d []byte) {
|
||||
if d[0] != 0x80 || d[1] != 0x20 || d[2] != 0x42 || d[3] != 0x34 {
|
||||
log.Println("unexpected status fixed bytes")
|
||||
}
|
||||
|
||||
// Model code.
|
||||
switch b := d[4]; b {
|
||||
case 0x38:
|
||||
log.Println("model: QL-800")
|
||||
case 0x39:
|
||||
log.Println("model: QL-810W")
|
||||
case 0x41:
|
||||
log.Println("model: QL-820NWB")
|
||||
default:
|
||||
log.Println("model:", b)
|
||||
}
|
||||
|
||||
// d[6] seems to be 0x00 in a real-world QL-800.
|
||||
if d[5] != 0x30 || d[6] != 0x30 || d[7] != 0x00 {
|
||||
log.Println("unexpected status fixed bytes")
|
||||
}
|
||||
|
||||
// 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:
|
||||
log.Println("media: continuous length tape")
|
||||
case 0x4b:
|
||||
log.Println("media: die-cut labels")
|
||||
default:
|
||||
log.Println("media:", b)
|
||||
}
|
||||
|
||||
// d[14] seems to be 0x14 in a real-world QL-800.
|
||||
if d[12] != 0x00 || d[13] != 0x00 || d[14] != 0x3f {
|
||||
log.Println("unexpected status fixed bytes")
|
||||
}
|
||||
|
||||
// Mode.
|
||||
log.Println("mode:", d[15])
|
||||
|
||||
if d[16] != 0x00 {
|
||||
log.Println("unexpected status fixed bytes")
|
||||
}
|
||||
|
||||
// Media length.
|
||||
log.Println("media width:", 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)
|
||||
}
|
||||
|
||||
// d[25] seems to be 0x01 in a real-world QL-800.
|
||||
if d[23] != 0x00 || d[24] != 0x00 || d[25] != 0x00 || d[26] != 0x00 ||
|
||||
d[27] != 0x00 || d[28] != 0x00 || d[29] != 0x00 || d[30] != 0x00 ||
|
||||
d[31] != 0x00 {
|
||||
log.Println("unexpected status fixed bytes")
|
||||
}
|
||||
}
|
||||
|
||||
func main() {
|
||||
// Linux usblp module, located in /drivers/usb/class/usblp.c
|
||||
// (at least that's where the trails go, I don't understand the code)
|
||||
f, err := os.OpenFile("/dev/usb/lp0", os.O_RDWR, 0)
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
defer f.Close()
|
||||
|
||||
// Flush any former responses in the printer's queue.
|
||||
for {
|
||||
dummy := make([]byte, 32)
|
||||
if _, err := f.Read(dummy); err == io.EOF {
|
||||
break
|
||||
}
|
||||
}
|
||||
|
||||
// Clear the print buffer.
|
||||
invalidate := make([]byte, 400)
|
||||
if _, err := f.Write(invalidate); err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
// Initialize.
|
||||
if _, err := f.WriteString("\x1b\x40"); err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
// Request status information.
|
||||
if _, err := f.WriteString("\x1b\x69\x53"); err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
// We need to poll the device.
|
||||
status := make([]byte, 32)
|
||||
for {
|
||||
if n, err := f.Read(status); err == io.EOF {
|
||||
time.Sleep(10 * time.Millisecond)
|
||||
} else if err != nil {
|
||||
log.Fatalln(err)
|
||||
} else if n < 32 {
|
||||
log.Fatalln("invalid read")
|
||||
} else {
|
||||
break
|
||||
}
|
||||
}
|
||||
|
||||
printStatusInformation(status)
|
||||
}
|
||||
5
go.mod
Normal file
5
go.mod
Normal file
@@ -0,0 +1,5 @@
|
||||
module janouch.name/sklad
|
||||
|
||||
go 1.12
|
||||
|
||||
require github.com/boombuler/barcode v1.0.0
|
||||
2
go.sum
Normal file
2
go.sum
Normal file
@@ -0,0 +1,2 @@
|
||||
github.com/boombuler/barcode v1.0.0 h1:s1TvRnXwL2xJRaccrdcBQMZxq6X7DvsMogtmJeHDdrc=
|
||||
github.com/boombuler/barcode v1.0.0/go.mod h1:paBWMcWSl3LHKBqUq+rly7CNSldXjb2rDl3JlRe0mD8=
|
||||
402
label-exp/main.go
Normal file
402
label-exp/main.go
Normal file
@@ -0,0 +1,402 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
"errors"
|
||||
"html/template"
|
||||
"image"
|
||||
"image/color"
|
||||
"image/draw"
|
||||
"image/png"
|
||||
"io"
|
||||
"log"
|
||||
"net/http"
|
||||
"os"
|
||||
"strconv"
|
||||
"time"
|
||||
|
||||
"github.com/boombuler/barcode"
|
||||
"github.com/boombuler/barcode/qr"
|
||||
|
||||
"janouch.name/sklad/bdf"
|
||||
)
|
||||
|
||||
// scaler is a scaling image.Image wrapper.
|
||||
type scaler struct {
|
||||
image image.Image
|
||||
scale int
|
||||
}
|
||||
|
||||
// ColorModel implements image.Image.
|
||||
func (s *scaler) ColorModel() color.Model {
|
||||
return s.image.ColorModel()
|
||||
}
|
||||
|
||||
// Bounds implements image.Image.
|
||||
func (s *scaler) Bounds() image.Rectangle {
|
||||
r := s.image.Bounds()
|
||||
return image.Rect(r.Min.X*s.scale, r.Min.Y*s.scale,
|
||||
r.Max.X*s.scale, r.Max.Y*s.scale)
|
||||
}
|
||||
|
||||
// At implements image.Image.
|
||||
func (s *scaler) At(x, y int) color.Color {
|
||||
if x < 0 {
|
||||
x = x - s.scale + 1
|
||||
}
|
||||
if y < 0 {
|
||||
y = y - s.scale + 1
|
||||
}
|
||||
return s.image.At(x/s.scale, y/s.scale)
|
||||
}
|
||||
|
||||
// -----------------------------------------------------------------------------
|
||||
|
||||
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:
|
||||
log.Println("media: continuous length tape")
|
||||
case 0x4b:
|
||||
log.Println("media: die-cut labels")
|
||||
default:
|
||||
log.Println("media:", b)
|
||||
}
|
||||
|
||||
// Mode.
|
||||
log.Println("mode:", d[15])
|
||||
|
||||
// Media length.
|
||||
log.Println("media width:", 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 int) (data []byte) {
|
||||
// TODO: Margins? For 29mm, it's 6 pins from the start, 306 printing pins.
|
||||
bounds := src.Bounds()
|
||||
pixels := make([]bool, 720)
|
||||
for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
|
||||
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)
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func printLabel(src image.Image) 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()
|
||||
data = append(data, 0x1b, 0x69, 0x7a, 0x02|0x04|0x40|0x80, 0x0a, 29, 0,
|
||||
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)
|
||||
|
||||
// 3mm margins along the direction of feed. 0x23 = 35 dots, the minimum.
|
||||
data = append(data, 0x1b, 0x69, 0x64, 0x23, 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, 6)...)
|
||||
|
||||
// Print command with feeding.
|
||||
data = append(data, 0x1a)
|
||||
|
||||
// ---
|
||||
|
||||
// Linux usblp module, located in /drivers/usb/class/usblp.c
|
||||
// (at least that's where the trails go, I don't understand the code)
|
||||
f, err := os.OpenFile("/dev/usb/lp0", os.O_RDWR, 0)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
defer f.Close()
|
||||
|
||||
// Flush any former responses in the printer's queue.
|
||||
for {
|
||||
dummy := make([]byte, 32)
|
||||
if _, err := f.Read(dummy); err == io.EOF {
|
||||
break
|
||||
}
|
||||
}
|
||||
|
||||
// Clear the print buffer.
|
||||
invalidate := make([]byte, 400)
|
||||
if _, err := f.Write(invalidate); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// Initialize.
|
||||
if _, err := f.WriteString("\x1b\x40"); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// Request status information.
|
||||
if _, err := f.WriteString("\x1b\x69\x53"); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// We need to poll the device.
|
||||
status := make([]byte, 32)
|
||||
for {
|
||||
if n, err := f.Read(status); err == io.EOF {
|
||||
time.Sleep(10 * time.Millisecond)
|
||||
} else if err != nil {
|
||||
return err
|
||||
} else if n < 32 {
|
||||
return errors.New("invalid read")
|
||||
} else {
|
||||
break
|
||||
}
|
||||
}
|
||||
printStatusInformation(status)
|
||||
|
||||
// Print the prepared data.
|
||||
if _, err := f.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 := time.Now()
|
||||
for {
|
||||
if time.Now().Sub(start) > 3*time.Second {
|
||||
break
|
||||
}
|
||||
if n, err := f.Read(status); 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(status)
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// -----------------------------------------------------------------------------
|
||||
|
||||
var font *bdf.Font
|
||||
|
||||
// TODO: By rotating the label we can make it smaller, as an alternate mode.
|
||||
func genLabel(text string, width int) image.Image {
|
||||
// Create a scaled bitmap of the QR code.
|
||||
qrImg, _ := qr.Encode(text, qr.H, qr.Auto)
|
||||
qrImg, _ = barcode.Scale(qrImg, 306, 306)
|
||||
qrRect := qrImg.Bounds()
|
||||
|
||||
// Create a scaled bitmap of the text label.
|
||||
textRect, _ := font.BoundString(text)
|
||||
textImg := image.NewRGBA(textRect)
|
||||
draw.Draw(textImg, textRect, image.White, image.ZP, draw.Src)
|
||||
font.DrawString(textImg, image.ZP, text)
|
||||
|
||||
// TODO: We can scale as needed to make the text fit.
|
||||
scaledTextImg := scaler{image: textImg, scale: 3}
|
||||
scaledTextRect := scaledTextImg.Bounds()
|
||||
|
||||
// Combine.
|
||||
combinedRect := qrRect
|
||||
combinedRect.Max.Y += scaledTextRect.Dy() + 20
|
||||
|
||||
combinedImg := image.NewRGBA(combinedRect)
|
||||
draw.Draw(combinedImg, combinedRect, image.White, image.ZP, draw.Src)
|
||||
draw.Draw(combinedImg, combinedRect, qrImg, image.ZP, draw.Src)
|
||||
|
||||
target := image.Rect(
|
||||
(width-scaledTextRect.Dx())/2, qrRect.Dy()+10,
|
||||
combinedRect.Max.X, combinedRect.Max.Y)
|
||||
draw.Draw(combinedImg, target, &scaledTextImg, scaledTextRect.Min, draw.Src)
|
||||
return combinedImg
|
||||
}
|
||||
|
||||
var tmpl = template.Must(template.New("form").Parse(`
|
||||
<!DOCTYPE html>
|
||||
<html><body>
|
||||
<table><tr>
|
||||
<td valign=top>
|
||||
<img border=1 src='?img&width={{.Width}}&text={{.Text}}'>
|
||||
</td>
|
||||
<td valign=top>
|
||||
<form><fieldset>
|
||||
<p><label for=width>Tape width in pt:</label>
|
||||
<input id=width name=width value='{{.Width}}'>
|
||||
<p><label for=text>Text:</label>
|
||||
<input id=text name=text value='{{.Text}}'>
|
||||
<p><input type=submit value='Update'>
|
||||
<input type=checkbox id=print name=print>
|
||||
<label for=print>Print label</label>
|
||||
</fieldset></form>
|
||||
</td>
|
||||
</tr></table>
|
||||
</body></html>
|
||||
`))
|
||||
|
||||
func handle(w http.ResponseWriter, r *http.Request) {
|
||||
if err := r.ParseForm(); err != nil {
|
||||
http.Error(w, err.Error(), 500)
|
||||
return
|
||||
}
|
||||
|
||||
var params = struct {
|
||||
Width int
|
||||
Text string
|
||||
}{
|
||||
Text: r.FormValue("text"),
|
||||
}
|
||||
|
||||
var err error
|
||||
params.Width, err = strconv.Atoi(r.FormValue("width"))
|
||||
if err != nil {
|
||||
params.Width = 306 // Default to 29mm tape.
|
||||
}
|
||||
|
||||
label := genLabel(params.Text, params.Width)
|
||||
if r.FormValue("print") != "" {
|
||||
if err := printLabel(label); err != nil {
|
||||
log.Println("print error:", err)
|
||||
}
|
||||
}
|
||||
|
||||
if _, ok := r.Form["img"]; !ok {
|
||||
w.Header().Set("Content-Type", "text/html")
|
||||
tmpl.Execute(w, ¶ms)
|
||||
return
|
||||
}
|
||||
|
||||
w.Header().Set("Content-Type", "image/png")
|
||||
if err := png.Encode(w, label); err != nil {
|
||||
http.Error(w, err.Error(), 500)
|
||||
return
|
||||
}
|
||||
}
|
||||
|
||||
func main() {
|
||||
var err error
|
||||
fi, err := os.Open("../../ucs-fonts-75dpi100dpi/100dpi/luBS24.bdf")
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
font, err = bdf.NewFromBDF(fi)
|
||||
if err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
if err := fi.Close(); err != nil {
|
||||
log.Fatalln(err)
|
||||
}
|
||||
|
||||
log.Println("Starting server")
|
||||
http.HandleFunc("/", handle)
|
||||
log.Fatal(http.ListenAndServe(":8080", nil))
|
||||
}
|
||||
Reference in New Issue
Block a user