/
collage.go
165 lines (156 loc) · 4 KB
/
collage.go
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package main
import (
"encoding/json"
"github.com/je4/zsearch/v2/pkg/mediaserver"
"github.com/je4/zsearch/v2/pkg/search"
"github.com/op/go-logging"
"github.com/pkg/errors"
"golang.org/x/image/draw"
"image"
"image/png"
"math/rand"
"os"
"path/filepath"
"time"
)
const HEIGHT = 150
func collage(logger *logging.Logger, exportPath string, ms mediaserver.Mediaserver, data []*search.SourceData) error {
var err error
var images = []struct {
signature string
img image.Image
}{}
var width int64
logger.Infof("creating collage")
for key, item := range data {
logger.Infof("item %v of %v", key, len(data))
derivatePath := filepath.ToSlash(filepath.Join("werke", item.SignatureOriginal, "derivate"))
for _, medias := range item.GetMedia() {
for _, m := range medias {
var thumb string
switch m.Type {
case "video":
thumb, err = mediaUrl(
logger,
exportPath,
ms,
derivatePath,
"jpg",
m.Uri+"$$timeshot$$3/resize/formatjpeg/size240x240")
case "audio":
thumb, err = mediaUrl(
logger,
exportPath,
ms,
derivatePath,
"jpg",
m.Uri+"$$poster/resize/formatjpeg/size240x240")
case "pdf":
thumb, err = mediaUrl(
logger,
exportPath,
ms,
derivatePath,
"jpg",
m.Uri+"$$poster/resize/formatjpeg/size240x240")
case "image":
thumb, err = mediaUrl(
logger,
exportPath,
ms,
derivatePath,
"jpg",
m.Uri+"/resize/autorotate/formatjpeg/size240x240")
}
if err != nil {
logger.Error(err)
continue
}
if thumb == "" {
continue
}
fullpath := filepath.Join(exportPath, derivatePath, thumb)
fp, err := os.Open(fullpath)
if err != nil {
logger.Panic(err)
}
img, _, err := image.Decode(fp)
if err != nil {
fp.Close()
continue
}
fp.Close()
dst := image.NewRGBA(image.Rect(0, 0, (HEIGHT*img.Bounds().Max.X)/img.Bounds().Max.Y, HEIGHT))
draw.ApproxBiLinear.Scale(dst, dst.Rect, img, img.Bounds(), draw.Over, nil)
images = append(images, struct {
signature string
img image.Image
}{signature: item.Signature, img: dst})
width += int64(img.Bounds().Dx())
}
}
}
rand.Seed(time.Now().UnixNano())
rand.Shuffle(len(images), func(i, j int) { images[i], images[j] = images[j], images[i] })
dx := 118.9 * 118.110236220472 * 1.8 * 1.1
intDx := int(dx)
dy := 84.1 * 118.110236220472 * 1.8
intDy := int(dy)
coll := image.NewRGBA(image.Rectangle{
Min: image.Point{},
Max: image.Point{X: intDx, Y: intDy},
})
row := 0
posX := 0
positions := map[string][]image.Rectangle{}
for i := 0; i < len(images); i++ {
key := i
img := images[key]
// for key, img := range images {
logger.Infof("collage image #%v of %v", key, len(images))
draw.Copy(coll,
image.Point{X: posX, Y: row * HEIGHT},
img.img,
img.img.Bounds(),
draw.Over,
nil)
if _, ok := positions[img.signature]; !ok {
positions[img.signature] = []image.Rectangle{}
}
positions[img.signature] = append(positions[img.signature], image.Rectangle{
Min: image.Point{X: posX, Y: row * HEIGHT},
Max: image.Point{X: posX + img.img.Bounds().Dx(), Y: row*HEIGHT + img.img.Bounds().Dy()},
})
posX += img.img.Bounds().Max.X
if posX > intDx {
posX = 0
row++
// repeat cropped image
i--
}
if (row+1)*HEIGHT > intDy {
logger.Infof("collage %v images of %v", key, len(images))
break
}
}
fp, err := os.Create(filepath.Join(exportPath, "collage.png"))
if err != nil {
return errors.Wrapf(err, "cannot create collage file")
}
if err := png.Encode(fp, coll); err != nil {
fp.Close()
return errors.Wrapf(err, "cannot encode collage png")
}
fp.Close()
fp, err = os.Create(filepath.Join(exportPath, "collage.json"))
if err != nil {
return errors.Wrapf(err, "cannot create collage json file")
}
jsonW := json.NewEncoder(fp)
if err := jsonW.Encode(positions); err != nil {
fp.Close()
return errors.Wrapf(err, "cannot store json")
}
fp.Close()
return nil
}