init

go.mod

@@ -0,0 +1,8 @@
+module gitnet.fr/deblan/smart-screensaver
+
+go 1.23.0
+
+require (
+	github.com/vitali-fedulov/hyper v1.0.1 // indirect
+	github.com/vitali-fedulov/images3 v1.0.16 // indirect
+)

go.sum

@@ -0,0 +1,4 @@
+github.com/vitali-fedulov/hyper v1.0.1 h1:juW5AgxqAVbAAlakTcc1IeO/iqT8R+KdIyia8tz29zE=
+github.com/vitali-fedulov/hyper v1.0.1/go.mod h1:nQqkBaCL7ETNg7c90cbfFeJWoKchMrPejZYr+kiuSQI=
+github.com/vitali-fedulov/images3 v1.0.16 h1:FBFR9v/MpA5H6VcoEMrpfX3epPxWhWZKhvA9R/VzssU=
+github.com/vitali-fedulov/images3 v1.0.16/go.mod h1:E53TQh4WO/byLuozZvfgJ/JIsSKsfbhnjaOnMAb4ZjM=

main.go

@@ -0,0 +1,65 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"os"
+	"os/exec"
+	"time"
+
+	"github.com/vitali-fedulov/images3"
+)
+
+var display string
+var imagesStore string
+var delay int
+
+func main() {
+	flag.StringVar(&display, "d", "", "Display")
+	flag.StringVar(&imagesStore, "s", "", "Images directory")
+	flag.IntVar(&delay, "t", 60, "Delay between checks")
+	flag.Parse()
+
+	directory, _ := os.MkdirTemp("", "smart-screensaver")
+	images := []string{}
+	i := 0
+
+	for {
+		image := fmt.Sprintf("%s/%d.jpg", directory, i)
+		_, err := exec.Command("import", "-display", display, "-window", "root", image).Output()
+
+		i++
+
+		if err == nil {
+			images = append(images, image)
+		}
+
+		log.Println("Checking...")
+
+		if len(images) == 2 {
+			img1, _ := images3.Open(images[0])
+			img2, _ := images3.Open(images[1])
+
+			icon1 := images3.Icon(img1, images[0])
+			icon2 := images3.Icon(img2, images[1])
+
+			if images3.Similar(icon1, icon2) {
+				log.Println("Starting screensaver...")
+				cmd := exec.Command("feh", "-F", "-r", "--on-last-slide", "resume", "-z", "-D", "2", imagesStore)
+				cmd.Env = []string{fmt.Sprintf("DISPLAY=%s", display)}
+				_, err := cmd.Output()
+
+				if err != nil {
+					log.Println(err.Error())
+				}
+			}
+
+			os.Remove(images[0])
+
+			images = []string{images[1]}
+		}
+
+		time.Sleep(time.Duration(delay) * time.Second)
+	}
+}