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/*
exif-terminator
Copyright (C) 2022 SuperSeriousBusiness admin@gotosocial.org
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package terminator
import (
"strings"
exif "github.com/dsoprea/go-exif/v3"
exifcommon "github.com/dsoprea/go-exif/v3/common"
)
type withEXIF interface {
Exif() (rootIfd *exif.Ifd, data []byte, err error)
SetExif(ib *exif.IfdBuilder) (err error)
}
func terminateEXIF(data withEXIF) error {
ifd, _, err := data.Exif()
if err != nil {
if strings.Contains(err.Error(), "no exif data") {
err = nil
}
return err
}
ifdb := exif.NewIfdBuilderFromExistingChain(ifd)
orientation, _ := ifdb.FindTagWithName("Orientation")
im, ti := exifcommon.NewIfdMapping(), exif.NewTagIndex()
ifdb = exif.NewIfdBuilder(im, ti, ifd.IfdIdentity(), ifd.ByteOrder())
if orientation != nil {
ifdb.Add(orientation)
}
return data.SetExif(ifdb)
}
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