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convert_image.go
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convert_image.go
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package photoprism
import (
"bytes"
"errors"
"fmt"
"os"
"os/exec"
"path/filepath"
"strings"
"time"
"github.com/gabriel-vasile/mimetype"
"github.com/photoprism/photoprism/internal/event"
"github.com/photoprism/photoprism/internal/thumb"
"github.com/photoprism/photoprism/pkg/clean"
"github.com/photoprism/photoprism/pkg/fs"
)
// ToImage converts a media file to a directly supported image file format.
func (c *Convert) ToImage(f *MediaFile, force bool) (*MediaFile, error) {
if f == nil {
return nil, fmt.Errorf("convert: file is nil - you may have found a bug")
}
if !f.Exists() {
return nil, fmt.Errorf("convert: %s not found", clean.Log(f.RootRelName()))
} else if f.Empty() {
return nil, fmt.Errorf("convert: %s is empty", clean.Log(f.RootRelName()))
} else if f.IsThumb() {
return nil, fmt.Errorf("convert: %s is a thumbnail image", clean.Log(f.RootRelName()))
}
if f.IsPreviewImage() {
return f, nil
}
var err error
imageName := fs.ImagePNG.FindFirst(f.FileName(), []string{c.conf.SidecarPath(), fs.PPHiddenPathname}, c.conf.OriginalsPath(), false)
if imageName == "" {
imageName = fs.ImageJPEG.FindFirst(f.FileName(), []string{c.conf.SidecarPath(), fs.PPHiddenPathname}, c.conf.OriginalsPath(), false)
}
mediaFile, err := NewMediaFile(imageName)
// Replace existing sidecar if "force" is true.
if err == nil && mediaFile.IsPreviewImage() {
if force && mediaFile.InSidecar() {
if removeErr := mediaFile.Remove(); removeErr != nil {
return mediaFile, fmt.Errorf("convert: failed removing %s (%s)", clean.Log(mediaFile.RootRelName()), removeErr)
} else {
log.Infof("convert: replacing %s", clean.Log(mediaFile.RootRelName()))
}
} else {
return mediaFile, nil
}
} else if f.IsVector() {
if !c.conf.VectorEnabled() {
return nil, fmt.Errorf("convert: vector graphics support disabled (%s)", clean.Log(f.RootRelName()))
}
imageName, _ = fs.FileName(f.FileName(), c.conf.SidecarPath(), c.conf.OriginalsPath(), fs.ExtPNG)
} else {
imageName, _ = fs.FileName(f.FileName(), c.conf.SidecarPath(), c.conf.OriginalsPath(), fs.ExtJPEG)
}
if !c.conf.SidecarWritable() {
return nil, fmt.Errorf("convert: disabled in read-only mode (%s)", clean.Log(f.RootRelName()))
}
fileName := f.RelName(c.conf.OriginalsPath())
xmpName := fs.SidecarXMP.Find(f.FileName(), false)
// Publish file conversion event.
event.Publish("index.converting", event.Data{
"fileType": f.FileType(),
"fileName": fileName,
"baseName": filepath.Base(fileName),
"xmpName": filepath.Base(xmpName),
})
start := time.Now()
// PNG, GIF, BMP, TIFF, and WebP can be handled natively.
if f.IsImageOther() {
log.Infof("convert: converting %s to %s (%s)", clean.Log(filepath.Base(fileName)), clean.Log(filepath.Base(imageName)), f.FileType())
// Create PNG or JPEG image from source file.
switch fs.LowerExt(imageName) {
case fs.ExtPNG:
_, err = thumb.Png(f.FileName(), imageName, f.Orientation())
case fs.ExtJPEG:
_, err = thumb.Jpeg(f.FileName(), imageName, f.Orientation())
default:
return nil, fmt.Errorf("convert: unspported target format %s (%s)", fs.LowerExt(imageName), clean.Log(f.RootRelName()))
}
// Check result.
if err == nil {
log.Infof("convert: %s created in %s (%s)", clean.Log(filepath.Base(imageName)), time.Since(start), f.FileType())
return NewMediaFile(imageName)
} else if !f.IsTIFF() && !f.IsWebP() {
// See https://github.com/photoprism/photoprism/issues/1612
// for TIFF file format compatibility.
return nil, err
}
}
// Run external commands for other formats.
var cmds []*exec.Cmd
var useMutex bool
var expectedMime string
switch fs.LowerExt(imageName) {
case fs.ExtPNG:
cmds, useMutex, err = c.PngConvertCommands(f, imageName)
expectedMime = fs.MimeTypePNG
case fs.ExtJPEG:
cmds, useMutex, err = c.JpegConvertCommands(f, imageName, xmpName)
expectedMime = fs.MimeTypeJPEG
default:
return nil, fmt.Errorf("convert: unspported target format %s (%s)", fs.LowerExt(imageName), clean.Log(f.RootRelName()))
}
if err != nil {
return nil, err
} else if len(cmds) == 0 {
return nil, fmt.Errorf("file type %s not supported", f.FileType())
}
if useMutex {
// Make sure only one command is executed at a time.
// See https://photo.stackexchange.com/questions/105969/darktable-cli-fails-because-of-locked-database-file
c.cmdMutex.Lock()
defer c.cmdMutex.Unlock()
}
if fs.FileExists(imageName) {
return NewMediaFile(imageName)
}
// Try compatible converters.
for _, cmd := range cmds {
// Fetch command output.
var out bytes.Buffer
var stderr bytes.Buffer
cmd.Stdout = &out
cmd.Stderr = &stderr
cmd.Env = []string{
fmt.Sprintf("HOME=%s", c.conf.CmdCachePath()),
fmt.Sprintf("LD_LIBRARY_PATH=%s", c.conf.CmdLibPath()),
}
log.Infof("convert: converting %s to %s (%s)", clean.Log(filepath.Base(fileName)), clean.Log(filepath.Base(imageName)), filepath.Base(cmd.Path))
// Log exact command for debugging in trace mode.
log.Trace(cmd.String())
// Run convert command.
if err = cmd.Run(); err != nil {
if errStr := strings.TrimSpace(stderr.String()); errStr != "" {
err = errors.New(errStr)
}
log.Tracef("convert: %s (%s)", strings.TrimSpace(err.Error()), filepath.Base(cmd.Path))
continue
} else if fs.FileExistsNotEmpty(imageName) {
log.Infof("convert: %s created in %s (%s)", clean.Log(filepath.Base(imageName)), time.Since(start), filepath.Base(cmd.Path))
break
} else if res := out.Bytes(); len(res) < 512 || !mimetype.Detect(res).Is(expectedMime) {
continue
} else if err = os.WriteFile(imageName, res, fs.ModeFile); err != nil {
log.Tracef("convert: %s (%s)", err, filepath.Base(cmd.Path))
continue
} else {
break
}
}
// Ok?
if err != nil {
return nil, err
}
return NewMediaFile(imageName)
}