initial commit

.github/workflows/goreleaser.yml

@@ -0,0 +1,29 @@
+name: goreleaser
+
+on:
+  pull_request:
+  push:
+    tags:
+      - '*'
+
+jobs:
+  goreleaser:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      -
+        name: Set up Go
+        uses: actions/setup-go@v3
+      -
+        name: Run GoReleaser
+        uses: goreleaser/goreleaser-action@v3
+        with:
+          distribution: goreleaser
+          version: latest
+          args: release --rm-dist
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.gitignore

@@ -0,0 +1 @@
+watermark-to-image*

.goreleaser.yaml

@@ -0,0 +1,9 @@
+builds:
+  -
+    goos:
+      - darwin
+      - linux
+      - windows
+    goarch:
+      - amd64
+      - arm64

README.md

@@ -1,2 +1,38 @@
 # watermark-to-image
-This application inserts a watermark in the lower right corner into the specified images folder.
+This application inserts a watermark in the lower right corner into all images of an specified images folder.
+
+# Examples
+Check out examples/original_images and examples/watermarked_images to get an idea what the application is doing.
+
+## Usage
+1. Build or download prebuild executeable
+2. Execute following command:
+```
+./watermark-to-image -sourceDirectory ./examples/original_images -targetDirectory ./examples/watermarked_images -watermarkImageFile ./examples/watermark.png
+```
+
+### Available command line parameter
+```
+./watermark-to-image --help
+  -sourceDirectory string
+        Source directory of original images
+  -targetDirectory string
+        Target directory for watermarked images
+  -watermarkImageFile string
+        Path and name of the watermark png image file
+  -watermarkIncreasement float
+        Scale factor of the watermark image file (default 100)
+  -watermarkMarginBottom int
+        Margin to the bottom edge for the watermark (default 20)
+  -watermarkMarginRight int
+        Margin to the right edge for the watermark (default 20)
+  -watermarkOpacity float
+        Opacity/Transparency of the watermark image file (default 0.5)
+```
+
+## Clone and build the project
+```
+$ git clone https://github.com/danielchristianschroeter/watermark-to-image
+$ cd watermark-to-image
+$ go build .
+```

go.mod

@@ -0,0 +1,12 @@
+module watermark-to-image
+
+go 1.19
+
+require (
+	github.com/disintegration/imaging v1.6.2
+	github.com/gabriel-vasile/mimetype v1.4.1
+	github.com/rwcarlsen/goexif v0.0.0-20190401172101-9e8deecbddbd
+	golang.org/x/image v0.2.0
+)
+
+require golang.org/x/net v0.0.0-20220722155237-a158d28d115b // indirect

go.sum

@@ -0,0 +1,35 @@
+github.com/disintegration/imaging v1.6.2 h1:w1LecBlG2Lnp8B3jk5zSuNqd7b4DXhcjwek1ei82L+c=
+github.com/disintegration/imaging v1.6.2/go.mod h1:44/5580QXChDfwIclfc/PCwrr44amcmDAg8hxG0Ewe4=
+github.com/gabriel-vasile/mimetype v1.4.1 h1:TRWk7se+TOjCYgRth7+1/OYLNiRNIotknkFtf/dnN7Q=
+github.com/gabriel-vasile/mimetype v1.4.1/go.mod h1:05Vi0w3Y9c/lNvJOdmIwvrrAhX3rYhfQQCaf9VJcv7M=
+github.com/rwcarlsen/goexif v0.0.0-20190401172101-9e8deecbddbd h1:CmH9+J6ZSsIjUK3dcGsnCnO41eRBOnY12zwkn5qVwgc=
+github.com/rwcarlsen/goexif v0.0.0-20190401172101-9e8deecbddbd/go.mod h1:hPqNNc0+uJM6H+SuU8sEs5K5IQeKccPqeSjfgcKGgPk=
+github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
+golang.org/x/image v0.0.0-20191009234506-e7c1f5e7dbb8/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
+golang.org/x/image v0.2.0 h1:/DcQ0w3VHKCC5p0/P2B0JpAZ9Z++V2KOo2fyU89CXBQ=
+golang.org/x/image v0.2.0/go.mod h1:la7oBXb9w3YFjBqaAwtynVioc1ZvOnNteUNrifGNmAI=
+golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/net v0.0.0-20220624214902-1bab6f366d9e/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
+golang.org/x/net v0.0.0-20220722155237-a158d28d115b h1:PxfKdU9lEEDYjdIzOtC4qFWgkU2rGHdKlKowJSMN9h0=
+golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
+golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
+golang.org/x/text v0.5.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

main.go

@@ -0,0 +1,212 @@
+package main
+
+import (
+	"flag"
+	"image"
+	"image/color"
+	"image/jpeg"
+	_ "image/png"
+	"log"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/disintegration/imaging"
+	"github.com/gabriel-vasile/mimetype"
+	"github.com/rwcarlsen/goexif/exif"
+	"golang.org/x/image/draw"
+)
+
+// Used for build version information
+var version = "development"
+
+// Global variables used for command line flags
+var (
+	sourceDirectory       string
+	targetDirectory       string
+	watermarkImageFile    string
+	watermarkIncreasement float64
+	watermarkOpacity      float64
+	watermarkMarginRight  int
+	watermarkMarginBottom int
+)
+
+func init() {
+	// Initialize command line flags
+	flag.StringVar(&sourceDirectory, "sourceDirectory", "", "Source directory of original images")
+	flag.StringVar(&targetDirectory, "targetDirectory", "", "Target directory for watermarked images")
+	flag.StringVar(&watermarkImageFile, "watermarkImageFile", "", "Path and name of the watermark png image file")
+	flag.Float64Var(&watermarkIncreasement, "watermarkIncreasement", 100, "Scale factor of the watermark image file")
+	flag.Float64Var(&watermarkOpacity, "watermarkOpacity", 0.5, "Opacity/Transparency of the watermark image file")
+	flag.IntVar(&watermarkMarginRight, "watermarkMarginRight", 20, "Margin to the right edge for the watermark")
+	flag.IntVar(&watermarkMarginBottom, "watermarkMarginBottom", 20, "Margin to the bottom edge for the watermark")
+}
+
+func processImage(file *os.File, targetDirectory string, watermarkImageFile string, watermarkIncreasement float64, watermarkMarginRight int, watermarkMarginBottom int, watermarkOpacity float64) error {
+
+	// Load the watermark png image file using image.Decode
+	watermarkFile, err := os.Open(watermarkImageFile)
+	if err != nil {
+		log.Fatalf("Failed to os.Open of file %+v Error: %+v", watermarkImageFile, err)
+	}
+	defer watermarkFile.Close()
+	watermark, _, err := image.Decode(watermarkFile)
+	if err != nil {
+		log.Fatalf("Failed to image.Decode of file %+v Error: %+v", watermarkImageFile, err)
+	}
+
+	// Read EXIF-Metadata of image
+	exifData, err := exif.Decode(file)
+	if err != nil {
+		log.Fatalf("Failed to exif.Decode of file %+v Error: %+v", file.Name(), err)
+	}
+
+	// Read Orientation-Tag from EXIF-Metadata
+	orientation, err := exifData.Get(exif.Orientation)
+	if err != nil {
+		log.Fatalf("Failed to exifData.Get of file %+v Error: %+v", file.Name(), err)
+	}
+
+	// Convert Orientation-Tag to integer value
+	orientationInt, err := orientation.Int(0)
+	if err != nil {
+		log.Fatalf("Failed to convert orientation-tag of file %+v Error: %+v", file.Name(), err)
+	}
+
+	// Seek to the beginning of the file before calling image.Decode
+	_, err = file.Seek(0, 0)
+	if err != nil {
+		log.Fatalf("Failed to file.Seek of file %+v Error: %+v", file.Name(), err)
+	}
+
+	// Decode the image from the buffer
+	img, _, err := image.Decode(file)
+	if err != nil {
+		log.Fatalf("Failed to image.Decode of file %+v Error: %+v", file.Name(), err)
+	}
+	// Rotate and/or flip image based on Orientation-Tag from EXIF-Metadata
+	switch orientationInt {
+	case 1:
+		// no adjustment needed
+	case 2:
+		img = imaging.FlipH(img)
+	case 3:
+		img = imaging.Rotate(img, 180, color.Transparent)
+	case 4:
+		img = imaging.FlipH(imaging.Rotate(img, 180, color.Transparent))
+	case 5:
+		img = imaging.FlipV(imaging.Rotate(img, 90, color.Transparent))
+	case 6:
+		img = imaging.Rotate(img, 270, color.Transparent)
+	case 7:
+		img = imaging.FlipV(imaging.Rotate(img, 270, color.Transparent))
+	case 8:
+		img = imaging.Rotate(img, 90, color.Transparent)
+	}
+
+	// Set the the margins (pixels).
+	//marginSide := 15
+	//marginBottom := 15
+
+	// Get the width and the height of our image.
+	photoWidth := img.Bounds().Dx()
+	photoHeight := img.Bounds().Dy()
+
+	// 	Get the width and the height of our watermark.
+	watermarkWidth := watermark.Bounds().Dx()
+	watermarkHeight := watermark.Bounds().Dy()
+
+	// Increase the dimensions of the watermark by a given percentage.
+	//percentage := 250 // increase dimensions
+	resizedWidth := int(float64(watermarkWidth) * (float64(watermarkIncreasement) / 100.0))
+	resizedHeight := int(float64(watermarkHeight) * (float64(watermarkIncreasement) / 100.0))
+	resizedWatermark := image.NewRGBA(image.Rect(0, 0, resizedWidth, resizedHeight))
+	draw.NearestNeighbor.Scale(resizedWatermark, resizedWatermark.Bounds(), watermark, watermark.Bounds(), draw.Over, nil)
+
+	// Figure out the dstX value.
+	dstX := photoWidth - resizedWidth - watermarkMarginRight
+
+	// Figure out the dstY value.
+	dstY := photoHeight - resizedHeight - watermarkMarginBottom
+
+	// Overlay the watermark onto the photo image with a specified opacity/transparency
+	dst := imaging.Overlay(img, resizedWatermark, image.Pt(dstX, dstY), watermarkOpacity)
+
+	// Save the new image
+	outFile, err := os.Create(targetDirectory + filepath.Base(file.Name()))
+	if err != nil {
+		// handle error
+		log.Fatalf("Failed to os.Create of file %+v Error: %+v", targetDirectory+filepath.Base(file.Name()), err)
+	}
+	defer outFile.Close()
+	jpeg.Encode(outFile, dst, nil)
+
+	log.Println("Saved watermarked image to " + targetDirectory + filepath.Base(file.Name()))
+
+	return nil
+}
+
+func main() {
+	log.SetFlags(0)
+	flag.Usage = func() {
+		log.Println("watermark-to-image. Version: " + version)
+		flag.PrintDefaults()
+	}
+	flag.Parse()
+
+	if len(sourceDirectory) == 0 || len(targetDirectory) == 0 || len(watermarkImageFile) == 0 {
+		log.Fatal("Usage: -sourceDirectory <sourceDirectory> -targetDirectory <targetDirectory> -watermarkImageFile <watermarkImageFile>")
+	}
+
+	// Add slash to source directory, if not exists
+	if !strings.HasSuffix(sourceDirectory, "/") {
+		sourceDirectory += "/"
+	}
+
+	// Add slash to target directory, if not exists
+	if !strings.HasSuffix(targetDirectory, "/") {
+		targetDirectory += "/"
+	}
+
+	log.Println("Processing imges from directory " + sourceDirectory + "...")
+	// Open the source directory
+	dir, err := os.Open(sourceDirectory)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer dir.Close()
+
+	// Get a list of all the files in the source directory
+	files, err := dir.Readdir(-1)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	// Loop through the images in the source directory
+	for _, file := range files {
+		// Open the image
+		f, err := os.Open(sourceDirectory + file.Name())
+		if err != nil {
+			log.Printf("Failed to os.Open of file %+v Error: %v", sourceDirectory+file.Name(), err)
+			continue
+		}
+		defer f.Close()
+
+		// Skip image/heic
+		mimeType, err := mimetype.DetectFile(sourceDirectory + file.Name())
+		if err != nil {
+			log.Printf("Failed to mimetype.DetectFile of file %+v Error: %v", sourceDirectory+file.Name(), err)
+		}
+		switch mimeType.String() {
+		case "image/heic":
+			log.Printf("Skipping %v Reason: heic not supported", sourceDirectory+file.Name())
+			continue
+		}
+
+		// Process the image
+		if err := processImage(f, targetDirectory, watermarkImageFile, watermarkIncreasement, watermarkMarginRight, watermarkMarginBottom, watermarkOpacity); err != nil {
+			log.Printf("Failed to processImage of file %+v Error: %v", sourceDirectory+file.Name(), err)
+			continue
+		}
+	}
+}