141 lines
3.5 KiB
Go
141 lines
3.5 KiB
Go
package scanner
|
|
|
|
import (
|
|
"image"
|
|
"image/jpeg"
|
|
"os"
|
|
|
|
"github.com/disintegration/imaging"
|
|
"github.com/photoview/photoview/api/graphql/models"
|
|
"github.com/photoview/photoview/api/scanner/image_helpers"
|
|
"github.com/photoview/photoview/api/utils"
|
|
"github.com/pkg/errors"
|
|
"gopkg.in/vansante/go-ffprobe.v2"
|
|
"gorm.io/gorm"
|
|
)
|
|
|
|
func DecodeImage(imagePath string) (image.Image, error) {
|
|
file, err := os.Open(imagePath)
|
|
if err != nil {
|
|
return nil, errors.Wrapf(err, "failed to open file to decode image (%s)", imagePath)
|
|
}
|
|
defer file.Close()
|
|
|
|
image, err := imaging.Decode(file, imaging.AutoOrientation(true))
|
|
if err != nil {
|
|
return nil, errors.Wrapf(err, "failed to decode image (%s)", imagePath)
|
|
}
|
|
|
|
return image, nil
|
|
}
|
|
|
|
// EncodeMediaData is used to easily decode media data, with a cache so expensive operations are not repeated
|
|
type EncodeMediaData struct {
|
|
media *models.Media
|
|
_photoImage image.Image
|
|
_thumbnailImage image.Image
|
|
_contentType *MediaType
|
|
_videoMetadata *ffprobe.ProbeData
|
|
}
|
|
|
|
func EncodeImageJPEG(image image.Image, outputPath string, jpegQuality int) error {
|
|
photo_file, err := os.Create(outputPath)
|
|
if err != nil {
|
|
return errors.Wrapf(err, "could not create file: %s", outputPath)
|
|
}
|
|
defer photo_file.Close()
|
|
|
|
err = jpeg.Encode(photo_file, image, &jpeg.Options{Quality: jpegQuality})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// ContentType reads the image to determine its content type
|
|
func (img *EncodeMediaData) ContentType() (*MediaType, error) {
|
|
if img._contentType != nil {
|
|
return img._contentType, nil
|
|
}
|
|
|
|
imgType, err := getMediaType(img.media.Path)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
img._contentType = imgType
|
|
return imgType, nil
|
|
}
|
|
|
|
func (img *EncodeMediaData) EncodeHighRes(tx *gorm.DB, outputPath string) error {
|
|
contentType, err := img.ContentType()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if !contentType.isSupported() {
|
|
return errors.New("could not convert photo as file format is not supported")
|
|
}
|
|
|
|
// Use darktable if there is no counterpart JPEG file to use instead
|
|
if contentType.isRaw() && img.media.CounterpartPath == nil {
|
|
if DarktableCli.IsInstalled() {
|
|
err := DarktableCli.EncodeJpeg(img.media.Path, outputPath, 70)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
} else {
|
|
return errors.New("could not convert photo as no RAW converter was found")
|
|
}
|
|
} else {
|
|
image, err := img.photoImage(tx)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
EncodeImageJPEG(image, outputPath, 70)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func EncodeThumbnail(inputPath string, outputPath string) (*image_helpers.PhotoDimensions, error) {
|
|
inputImage, err := DecodeImage(inputPath)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
dimensions := image_helpers.PhotoDimensionsFromRect(inputImage.Bounds())
|
|
dimensions = dimensions.ThumbnailScale()
|
|
|
|
thumbImage := imaging.Resize(inputImage, dimensions.Width, dimensions.Height, imaging.NearestNeighbor)
|
|
if err = EncodeImageJPEG(thumbImage, outputPath, 60); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return &dimensions, nil
|
|
}
|
|
|
|
// PhotoImage reads and decodes the image file and saves it in a cache so the photo in only decoded once
|
|
func (img *EncodeMediaData) photoImage(tx *gorm.DB) (image.Image, error) {
|
|
if img._photoImage != nil {
|
|
return img._photoImage, nil
|
|
}
|
|
|
|
var photoPath string
|
|
if img.media.CounterpartPath != nil {
|
|
photoPath = *img.media.CounterpartPath
|
|
} else {
|
|
photoPath = img.media.Path
|
|
}
|
|
|
|
photoImg, err := DecodeImage(photoPath)
|
|
if err != nil {
|
|
return nil, utils.HandleError("image decoding", err)
|
|
}
|
|
|
|
img._photoImage = photoImg
|
|
return img._photoImage, nil
|
|
}
|