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940 B

2 years ago
package base64Captcha
import (
"embed"
"github.com/golang/freetype"
"github.com/golang/freetype/truetype"
)
type EmbeddedFontsStorage struct {
fs embed.FS
}
func (s *EmbeddedFontsStorage) LoadFontByName(name string) *truetype.Font {
fontBytes, err := s.fs.ReadFile(name)
if err != nil {
panic(err)
}
//font file bytes to trueTypeFont
trueTypeFont, err := freetype.ParseFont(fontBytes)
if err != nil {
panic(err)
}
return trueTypeFont
}
// LoadFontsByNames import fonts from dir.
// make the simple-font(RitaSmith.ttf) the first font of trueTypeFonts.
func (s *EmbeddedFontsStorage) LoadFontsByNames(assetFontNames []string) []*truetype.Font {
fonts := make([]*truetype.Font, 0)
for _, assetName := range assetFontNames {
f := s.LoadFontByName(assetName)
fonts = append(fonts, f)
}
return fonts
}
func NewEmbeddedFontsStorage(fs embed.FS) *EmbeddedFontsStorage {
return &EmbeddedFontsStorage{
fs: fs,
}
}