1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
|
package main
import (
"errors"
"html/template"
"image"
"image/draw"
"image/png"
"log"
"net/http"
"os"
"strconv"
"janouch.name/sklad/bdf"
"janouch.name/sklad/imgutil"
"janouch.name/sklad/label"
"janouch.name/sklad/ql"
)
var tmplFont = template.Must(template.New("font").Parse(`
<!DOCTYPE html>
<html><body>
<h1>PT-CBP label printing tool</h1>
<h2>Choose font</h2>
{{ range $i, $f := . }}
<p><a href='?font={{ $i }}'>
<img src='?font={{ $i }}&preview' title='{{ $f.Path }}'></a>
{{ end }}
</body></html>
`))
var tmplForm = template.Must(template.New("form").Parse(`
<!DOCTYPE html>
<html><body>
<h1>PT-CBP label printing tool</h1>
<table><tr>
<td valign=top>
<img border=1 src='?font={{ .FontIndex }}&scale={{ .Scale }}{{/*
*/}}&text={{ .Text }}&render'>
</td>
<td valign=top><form>
<fieldset>
{{ if .Printer }}
<p>Printer: {{ .Printer.Manufacturer }} {{ .Printer.Model }}
<p>Tape:
{{ if .Printer.LastStatus }}
{{ .Printer.LastStatus.MediaWidthMM }} mm ×
{{ .Printer.LastStatus.MediaLengthMM }} mm
{{ if .MediaInfo }}
(offset: {{ .MediaInfo.SideMarginPins }} pt,
print area: {{ .MediaInfo.PrintAreaPins }} pt)
{{ else }}
(unknown media)
{{ end }}
{{ if .Printer.LastStatus.Errors }}
{{ range .Printer.LastStatus.Errors }}
<p>Error: {{ . }}
{{ end }}
{{ end }}
{{ end }}
{{ if .InitErr }}
{{ .InitErr }}
{{ end }}
{{ else }}
<p>Error: {{ .PrinterErr }}
{{ end }}
</fieldset>
<fieldset>
<legend>Font</legend>
<p>{{ .Font.Name }} <a href='?'>Change</a>
<input type=hidden name=font value='{{ .FontIndex }}'>
<p><label for=scale>Scale:</label>
<input id=scale name=scale value='{{.Scale}}' size=1>
</fieldset>
<fieldset>
<legend>Label</legend>
<p><textarea name=text>{{.Text}}</textarea>
<p>Kind:
<input type=radio id=kind-text name=kind value=text
{{ if eq .Kind "text" }} checked{{ end }}>
<label for=kind-text>plain text (horizontal)</label>
<input type=radio id=kind-qr name=kind value=qr
{{ if eq .Kind "qr" }} checked{{ end }}>
<label for=kind-qr>QR code (vertical)</label>
<p><input type=submit value='Update'>
<input type=submit name=print value='Update and Print'>
</fieldset>
</form></td>
</tr></table>
</body></html>
`))
type fontItem struct {
Path string
Font *bdf.Font
Preview image.Image
}
var fonts = []*fontItem{}
func getPrinter() (*ql.Printer, error) {
printer, err := ql.Open()
if err != nil {
return nil, err
}
if printer == nil {
return nil, errors.New("no suitable printer found")
}
return printer, nil
}
func getStatus(printer *ql.Printer) error {
if err := printer.Initialize(); err != nil {
return err
}
if err := printer.UpdateStatus(); err != nil {
return err
}
return nil
}
func handle(w http.ResponseWriter, r *http.Request) {
if r.Method == http.MethodGet {
w.Header().Set("Cache-Control", "no-store")
}
var (
font *fontItem
fontIndex int
err error
)
if fontIndex, err = strconv.Atoi(r.FormValue("font")); err == nil {
font = fonts[fontIndex]
} else {
w.Header().Set("Content-Type", "text/html")
if err := tmplFont.Execute(w, fonts); err != nil {
http.Error(w, err.Error(), 500)
}
return
}
if _, ok := r.Form["preview"]; ok {
w.Header().Set("Content-Type", "image/png")
if err := png.Encode(w, font.Preview); err != nil {
http.Error(w, err.Error(), 500)
}
return
}
var (
initErr error
mediaInfo *ql.MediaInfo
)
printer, printerErr := getPrinter()
if printerErr == nil {
defer printer.Close()
printer.StatusNotify = func(status *ql.Status) {
log.Printf("\x1b[1mreceived status\x1b[m\n%s", status)
}
if initErr = getStatus(printer); initErr == nil {
mediaInfo = ql.GetMediaInfo(
printer.LastStatus.MediaWidthMM(),
printer.LastStatus.MediaLengthMM(),
)
}
}
var params = struct {
Printer *ql.Printer
PrinterErr error
InitErr error
MediaInfo *ql.MediaInfo
Font *bdf.Font
FontIndex int
Text string
Scale int
Kind string
}{
Printer: printer,
PrinterErr: printerErr,
InitErr: initErr,
MediaInfo: mediaInfo,
Font: font.Font,
FontIndex: fontIndex,
Text: r.FormValue("text"),
Kind: r.FormValue("kind"),
}
params.Scale, err = strconv.Atoi(r.FormValue("scale"))
if err != nil {
params.Scale = 3
}
if params.Kind == "" {
params.Kind = "text"
}
var img image.Image
if mediaInfo != nil {
if params.Kind == "qr" {
img = &imgutil.LeftRotate{Image: label.GenLabelForHeight(
font.Font, params.Text, mediaInfo.PrintAreaPins, params.Scale)}
} else {
img = label.GenLabelForWidth(
font.Font, params.Text, mediaInfo.PrintAreaPins, params.Scale)
}
if r.FormValue("print") != "" {
if err := printer.Print(img); err != nil {
log.Println("print error:", err)
}
}
}
if _, ok := r.Form["render"]; !ok {
w.Header().Set("Content-Type", "text/html")
if err := tmplForm.Execute(w, ¶ms); err != nil {
http.Error(w, err.Error(), 500)
}
return
}
if mediaInfo == nil {
http.Error(w, "unknown media", 500)
return
}
w.Header().Set("Content-Type", "image/png")
if err := png.Encode(w, img); err != nil {
http.Error(w, err.Error(), 500)
return
}
}
func main() {
if len(os.Args) < 3 {
log.Fatalf("usage: %s ADDRESS BDF-FILE...\n", os.Args[0])
}
address, bdfPaths := os.Args[1], os.Args[2:]
for _, path := range bdfPaths {
fi, err := os.Open(path)
if err != nil {
log.Fatalln(err)
}
font, err := bdf.NewFromBDF(fi)
if err != nil {
log.Fatalf("%s: %s\n", path, err)
}
if err := fi.Close(); err != nil {
log.Fatalln(err)
}
r, _ := font.BoundString(font.Name)
super := r.Inset(-3)
img := image.NewRGBA(super)
draw.Draw(img, super, image.White, image.ZP, draw.Src)
font.DrawString(img, image.ZP, font.Name)
fonts = append(fonts, &fontItem{Path: path, Font: font, Preview: img})
}
log.Println("starting server")
http.HandleFunc("/", handle)
log.Fatalln(http.ListenAndServe(address, nil))
}
|
