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x_letter.go
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/
x_letter.go
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package xavatar
import (
"fmt"
"image"
"image/color"
"unicode/utf8"
"github.com/disintegration/letteravatar"
"github.com/evercyan/brick/xfont"
"github.com/evercyan/brick/ximg"
"github.com/evercyan/brick/xregex"
"github.com/evercyan/brick/xutil"
)
// xLetter ...
type xLetter struct {
*xBase
}
// Image ...
func (t *xLetter) Image(char string) (image.Image, error) {
if xutil.Len(char) != 1 {
return nil, fmt.Errorf("char must contain only one letter")
}
opt := &letteravatar.Options{
Palette: []color.Color{t.opt.BgColor},
LetterColor: t.opt.Color,
}
if xregex.HasChinese(char) {
opt.Font = xfont.LoadAlimamaFangYuanTiVF()
}
firstLetter, _ := utf8.DecodeRuneInString(char)
img, err := letteravatar.Draw(t.opt.Size, firstLetter, opt)
if err != nil {
return nil, err
}
if t.opt.Radious > 0 {
img = ximg.Rounded(img, t.opt.Radious)
}
return img, nil
}
// Save ...
func (t *xLetter) Save(char, fpath string) error {
img, err := t.Image(char)
if err != nil {
return err
}
return ximg.Write(fpath, img)
}
// ----------------------------------------------------------------
func newLetter(opt *option) Avatar {
return &xLetter{
xBase: &xBase{
opt: opt,
},
}
}