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