// Encode encodes a string using the given version, level, and mask.
func Encode(w http.ResponseWriter, req *http.Request) {
val := func(s string) int {
v, _ := strconv.Atoi(req.FormValue(s))
return v
}
l := coding.Level(val("l"))
v := coding.Version(val("v"))
enc := coding.String(req.FormValue("t"))
m := coding.Mask(val("m"))
p, err := coding.NewPlan(v, l, m)
if err != nil {
panic(err)
}
cc, err := p.Encode(enc)
if err != nil {
panic(err)
}
c := &qr.Code{Bitmap: cc.Bitmap, Size: cc.Size, Stride: cc.Stride, Scale: 8}
w.Header().Set("Content-Type", "image/png")
w.Header().Set("Cache-Control", "public, max-age=3600")
w.Write(c.PNG())
}
func makeMask(req *http.Request, font string, pt int, vers, mask, scale int) image.Image {
p, err := coding.NewPlan(coding.Version(vers), coding.L, coding.Mask(mask))
if err != nil {
panic(err)
}
m := makeImage(req, maskName[mask], font, pt, len(p.Pixel), 0, scale, func(x, y int) uint32 {
pix := p.Pixel[y][x]
switch pix.Role() {
case coding.Data, coding.Check:
if pix&coding.Invert != 0 {
return 0x000000ff
}
}
return 0xffffffff
})
return m
}