├── go.mod ├── .gitignore ├── util.go ├── go.sum ├── tiles.go ├── img_watermark.go ├── text_watermark.go ├── README.md ├── main.go └── LICENSE /go.mod: -------------------------------------------------------------------------------- 1 | module github.com/ajaxray/markpdf 2 | 3 | go 1.12 4 | 5 | require ( 6 | github.com/boombuler/barcode v1.0.0 // indirect 7 | github.com/ogier/pflag v0.0.1 8 | github.com/unidoc/unidoc v2.0.1+incompatible 9 | golang.org/x/image v0.0.0-20201208152932-35266b937fa6 // indirect 10 | ) 11 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # Binaries for programs and plugins 2 | *.exe 3 | *.exe~ 4 | *.dll 5 | *.so 6 | *.dylib 7 | 8 | # Test binary, build with `go test -c` 9 | *.test 10 | 11 | # Output of the go coverage tool, specifically when used with LiteIDE 12 | *.out 13 | 14 | # Project specific 15 | builds/ 16 | tmp/ 17 | markpdf 18 | *.pdf -------------------------------------------------------------------------------- /util.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "fmt" 5 | "log" 6 | "os" 7 | ) 8 | 9 | func debugInfo(message string) { 10 | if verbose { 11 | log.Println(message) 12 | } 13 | } 14 | 15 | func fatalIfError(err error, message string) { 16 | if err != nil { 17 | fmt.Printf("ERROR: %s \n", message) 18 | os.Exit(1) 19 | } 20 | } 21 | -------------------------------------------------------------------------------- /go.sum: -------------------------------------------------------------------------------- 1 | github.com/boombuler/barcode v1.0.0 h1:s1TvRnXwL2xJRaccrdcBQMZxq6X7DvsMogtmJeHDdrc= 2 | github.com/boombuler/barcode v1.0.0/go.mod h1:paBWMcWSl3LHKBqUq+rly7CNSldXjb2rDl3JlRe0mD8= 3 | github.com/ogier/pflag v0.0.1 h1:RW6JSWSu/RkSatfcLtogGfFgpim5p7ARQ10ECk5O750= 4 | github.com/ogier/pflag v0.0.1/go.mod h1:zkFki7tvTa0tafRvTBIZTvzYyAu6kQhPZFnshFFPE+g= 5 | github.com/unidoc/unidoc v2.0.1+incompatible h1:IwNeWnUTacFQzYCRzHQj+33zOsbjtHMa+Ukw/1T+Xh8= 6 | github.com/unidoc/unidoc v2.0.1+incompatible/go.mod h1:xz5DRu10sgNndY6/LrqtXytidQ/aXastVtkIVSxIj3Q= 7 | golang.org/x/image v0.0.0-20201208152932-35266b937fa6 h1:nfeHNc1nAqecKCy2FCy4HY+soOOe5sDLJ/gZLbx6GYI= 8 | golang.org/x/image v0.0.0-20201208152932-35266b937fa6/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0= 9 | golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= 10 | -------------------------------------------------------------------------------- /tiles.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "fmt" 5 | "github.com/unidoc/unidoc/pdf/creator" 6 | "math" 7 | ) 8 | 9 | // Watermarkable is a common interface for watermarkable image or paragraph 10 | type Watermarkable interface { 11 | creator.VectorDrawable 12 | SetPos(x, y float64) 13 | } 14 | 15 | func repeatTiles(watermark Watermarkable, c *creator.Creator) { 16 | w := watermark.Width() 17 | h := watermark.Height() 18 | pw := c.Context().PageWidth 19 | ph := c.Context().PageHeight 20 | 21 | nw := math.Ceil(pw / w) 22 | nh := math.Ceil(ph / h) 23 | 24 | debugInfo(fmt.Sprintf("Settings tiles of %v x %v", nw, nh)) 25 | for i := 0; i < int(nw); i++ { 26 | x := w * float64(i) 27 | for j := 0; j < int(nh); j++ { 28 | y := h * float64(j) 29 | watermark.SetPos(x + spacing * float64(i), y + spacing * float64(j)) 30 | err := c.Draw(watermark) 31 | if err != nil { 32 | fatalIfError(err, fmt.Sprintf("Error %s", err)) 33 | } 34 | } 35 | } 36 | } 37 | -------------------------------------------------------------------------------- /img_watermark.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "fmt" 5 | "math" 6 | 7 | "github.com/unidoc/unidoc/pdf/creator" 8 | ) 9 | 10 | func drawImage(watermarkImg *creator.Image, c *creator.Creator) { 11 | watermarkImg.SetOpacity(opacity) 12 | watermarkImg.SetAngle(angle) 13 | if tiles { 14 | repeatTiles(watermarkImg, c) 15 | return 16 | } 17 | watermarkImg.SetPos(offsetX, offsetY) 18 | _ = c.Draw(watermarkImg) 19 | } 20 | 21 | func adjustImagePosition(watermarkImg *creator.Image, c *creator.Creator) { 22 | debugInfo(fmt.Sprintf("Watermark Width : %v", watermarkImg.Width())) 23 | debugInfo(fmt.Sprintf("Watermark Height : %v", watermarkImg.Height())) 24 | 25 | 26 | if scaleImage != 100 { 27 | debugInfo(fmt.Sprintf("Scaling to %v%%", scaleImage)) 28 | watermarkImg.ScaleToHeight(scaleImage * watermarkImg.Width() / 100) 29 | } 30 | if tiles { 31 | offsetX, offsetY = 0, 0 32 | return 33 | } 34 | if scaleWCenter { 35 | watermarkImg.ScaleToWidth(c.Context().PageWidth) 36 | offsetX = 0 37 | offsetY = (c.Context().PageHeight - watermarkImg.Height()) / 2 38 | } else if scaleHCenter { 39 | watermarkImg.ScaleToHeight(c.Context().PageHeight) 40 | offsetX = (c.Context().PageWidth - watermarkImg.Width()) / 2 41 | offsetY = 0 42 | } else if scaleW { 43 | watermarkImg.ScaleToWidth(c.Context().PageWidth) 44 | offsetX = 0 45 | } else if scaleH { 46 | watermarkImg.ScaleToHeight(c.Context().PageHeight) 47 | offsetY = 0 48 | } else if center { 49 | offsetX = (c.Context().PageWidth - watermarkImg.Width()) / 2 50 | offsetY = (c.Context().PageHeight - watermarkImg.Height()) / 2 51 | } 52 | 53 | // None of the above logic is setting negative position 54 | // So, if found, that must be set from command line flags 55 | if offsetX < 0 { 56 | offsetX = c.Context().PageWidth - (watermarkImg.Width() + math.Abs(offsetX)) 57 | } 58 | if offsetY < 0 { 59 | offsetY = c.Context().PageHeight - (watermarkImg.Height() + math.Abs(offsetY)) 60 | } 61 | } 62 | -------------------------------------------------------------------------------- /text_watermark.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "bytes" 5 | "fmt" 6 | "math" 7 | "text/template" 8 | 9 | "github.com/unidoc/unidoc/pdf/creator" 10 | "github.com/unidoc/unidoc/pdf/model/fonts" 11 | ) 12 | 13 | var fontList = []string{ 14 | "courier", "courier_bold", "courier_oblique", "courier_bold_oblique", 15 | "helvetica", "helvetica_bold", "helvetica_oblique", "helvetica_bold_oblique", 16 | "times", "times_bold", "times_italic", "times_bold_italic", 17 | } 18 | 19 | func drawText(p *creator.Paragraph, c *creator.Creator) { 20 | // Change to times bold font (default is helvetica). 21 | p.SetFont(getFontByName(font)) 22 | p.SetFontSize(fontSize) 23 | p.SetPos(offsetX, offsetY) 24 | p.SetColor(creator.ColorRGBFromHex("#" + color)) 25 | p.SetAngle(angle) 26 | 27 | // Encountering problem with tiles and text watermark. Contributions welcome. 28 | //if tiles { 29 | // repeatTiles(p, c) 30 | // return 31 | //} 32 | 33 | _ = c.Draw(p) 34 | } 35 | 36 | func adjustTextPosition(p *creator.Paragraph, c *creator.Creator) { 37 | p.SetTextAlignment(creator.TextAlignmentLeft) 38 | p.SetEnableWrap(false) 39 | 40 | if tiles { 41 | p.SetWidth(p.Width()) // Not working without setting it manually 42 | p.SetTextAlignment(creator.TextAlignmentCenter) 43 | offsetX, offsetY = 0, 0 44 | } else if center { 45 | p.SetWidth(p.Width()) // Not working without setting it manually 46 | p.SetTextAlignment(creator.TextAlignmentCenter) 47 | 48 | offsetX = (c.Context().PageWidth / 2) - (p.Width() / 2) 49 | offsetY = (c.Context().PageHeight / 2) - (p.Height() / 2) 50 | } else { 51 | if offsetX < 0 { 52 | p.SetWidth(p.Width()) // Not working without setting it manually 53 | p.SetTextAlignment(creator.TextAlignmentRight) 54 | 55 | offsetX = c.Context().PageWidth - (math.Abs(offsetX) + p.Width()) 56 | } 57 | if offsetY < 0 { 58 | offsetY = c.Context().PageHeight - (math.Abs(offsetY) + p.Height()) 59 | } 60 | 61 | } 62 | 63 | debugInfo(fmt.Sprintf("Paragraph width: %f", p.Width())) 64 | debugInfo(fmt.Sprintf("Paragraph height: %f", p.Height())) 65 | debugInfo(fmt.Sprintf("Offsets x: %f, y: %f", offsetX, offsetY)) 66 | } 67 | 68 | func getFontByName(fontName string) fonts.Font { 69 | switch fontName { 70 | case "courier": 71 | return fonts.NewFontCourier() 72 | case "courier_bold": 73 | return fonts.NewFontCourierBold() 74 | case "courier_oblique": 75 | return fonts.NewFontCourierOblique() 76 | case "courier_bold_oblique": 77 | return fonts.NewFontCourierBoldOblique() 78 | case "helvetica": 79 | return fonts.NewFontHelvetica() 80 | case "helvetica_bold": 81 | return fonts.NewFontHelveticaBold() 82 | case "helvetica_oblique": 83 | return fonts.NewFontHelveticaOblique() 84 | case "helvetica_bold_oblique": 85 | return fonts.NewFontHelveticaBoldOblique() 86 | case "times": 87 | return fonts.NewFontTimesRoman() 88 | case "times_bold": 89 | return fonts.NewFontTimesBold() 90 | case "times_italic": 91 | return fonts.NewFontTimesItalic() 92 | case "times_bold_italic": 93 | return fonts.NewFontTimesBoldItalic() 94 | } 95 | 96 | debugInfo("No allowed font name didn't match the allowed list. Using helvetica_bold as default.") 97 | debugInfo(fmt.Sprintf("Allowed font names: %s", fontList)) 98 | 99 | return fonts.NewFontHelveticaBold() 100 | } 101 | 102 | func isWatermarkATemplate(watermark string) bool { 103 | t := template.Must(template.New("watermark").Parse(watermark)) 104 | buf := new(bytes.Buffer) 105 | err := t.Execute(buf, Recipient{0, 0, "out.pdf"}) 106 | if err != nil { 107 | fatalIfError(err, fmt.Sprintf("Error parsing the template. [%s]", err)) 108 | } 109 | return buf.String() != watermark 110 | } 111 | 112 | func applyTemplate(t *template.Template, rec *Recipient, para *creator.Paragraph) { 113 | buf := new(bytes.Buffer) 114 | err := t.Execute(buf, rec) 115 | fatalIfError(err, fmt.Sprintf("Failed to execute watermark template: [%s]", err)) 116 | para.SetText(buf.String()) 117 | } -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # markpdf - Watermark PDF files using image or text 2 | 3 | A tiny command line tool for watermarking PDF files using image or text. 4 | With simple options to configure position, opacity, rotation, stretch etc. 5 | 6 | Highlights - 7 | 8 | - Very simple and easy to use 9 | - Extreamly fast! 10 | - Stretching watermark image to height or weight proportionately 11 | - Options to adjust position, opacity, rotation of image 12 | - Placeholder for text watermark 13 | - Tile image watermark all over the page 14 | - Free and open source 15 | 16 | ## Install 17 | 18 | It's just a single binary file, no external dependencies. 19 | Just download the appropriate version of [executable from latest release](https://github.com/ajaxray/markpdf/releases) for your OS. Then rename and give it execute permission. 20 | ```bash 21 | mv markpdf_linux-amd64 markpdf 22 | sudo chmod +x markpdf 23 | ``` 24 | 25 | If you want to install it globally (run from any directory of your system), put it in your systems $PATH directory. 26 | ```bash 27 | sudo mv markpdf /usr/local/bin/markpdf 28 | ``` 29 | Done! 30 | 31 | ## How to use 32 | 33 | ### Image watermarking 34 | 35 | Command options are shown in both, shorthand and full name. 36 | 37 | ```bash 38 | # watermark with all default options (on top left corner with 50% opacity) 39 | markpdf "path/to/source.pdf" "img/logo.png" "path/to/output.pdf" 40 | 41 | # watermark at center 42 | markpdf "path/to/source.pdf" "img/logo.png" "path/to/output.pdf" --center 43 | markpdf "path/to/source.pdf" "img/logo.png" "path/to/output.pdf" -c 44 | 45 | # watermark at right top with 20px offset from edge and full opaque 46 | markpdf "path/to/source.pdf" "img/logo.png" "path/to/output.pdf" --offset-x=-20 --offset-y=20 --opacity=1.0 47 | markpdf "path/to/source.pdf" "img/logo.png" "path/to/output.pdf" -x -20 -y 20 -o 1.0 48 | 49 | # watermark at left bottom with 100px offset and 45 degree rotation 50 | markpdf "path/to/source.pdf" "img/logo.png" "path/to/output.pdf" --offset-x=100 --offset-y=-100 --angle=45 51 | markpdf "path/to/source.pdf" "img/logo.png" "path/to/output.pdf" -x 100 -y -100 -a 45 52 | 53 | # stretch full with of page at page middle, with 30% opacity 54 | markpdf "path/to/source.pdf" "img/logo.png" "path/to/output.pdf" --scale-width-center --opacity=0.3 55 | markpdf "path/to/source.pdf" "img/logo.png" "path/to/output.pdf" -Wo 0.3 56 | # Note the capital "W" 57 | 58 | # stretch full with of page at page bottom 59 | markpdf "path/to/source.pdf" "img/logo.png" "path/to/output.pdf" --scale-width --offset-y=-10 60 | markpdf "path/to/source.pdf" "img/logo.png" "path/to/output.pdf" -wy -10 61 | 62 | # Scale the image to desired percentage 63 | markpdf "path/to/source.pdf" "img/logo.png" "path/to/output.pdf" --scale=30 64 | 65 | # Add image as tiles all over the page 66 | markpdf "path/to/source.pdf" "img/logo.png" "path/to/output.pdf" --tiles 67 | 68 | # Add image as tiles with interleaved spacing 69 | markpdf "path/to/source.pdf" "img/logo.png" "path/to/output.pdf" --tiles --spacing=20 70 | ``` 71 | 72 | 73 | ### Text watermarking 74 | 75 | ```bash 76 | # watermark text at right top with 20px offset from edge 77 | markpdf "path/to/source.pdf" "The Company Name" "path/to/output.pdf" --offset-x=-20 --offset-y=20 78 | markpdf "path/to/source.pdf" "The Company Name" "path/to/output.pdf" -x -20 -y 20 79 | 80 | # Place text at center with bold-italic "Times Roman" font in blue color 81 | markpdf "path/to/source.pdf" "The Company Name" "path/to/output.pdf" --center --font=times_bold_italic --color=0000FF 82 | markpdf "path/to/source.pdf" "The Company Name" "path/to/output.pdf" -cf times_bold_italic -l 0000FF 83 | 84 | # Place text at center with large bold-italic "Times Roman" font in blue color 85 | markpdf "path/to/source.pdf" "The Company Name" "path/to/output.pdf" --center --font=times_bold_italic --font-size=24.0 --color=0000FF 86 | markpdf "path/to/source.pdf" "The Company Name" "path/to/output.pdf" -cf times_bold_italic -s 24.0 -l 0000FF 87 | ``` 88 | 89 | #### Using placeholders with text watermark 90 | 91 | The following placeholder can be used in text watermark: 92 | - `{{.Page}}` prints the current page number 93 | - `{{.Pages}}` prints the total page numbers 94 | - `{{.Filename}}` prints name of the source file 95 | 96 | ```bash 97 | # Using placeholders in text watermark 98 | markpdf "path/to/083.pdf" "File: {{.Filename}} Page {{.Page}} of {{.Pages}}" "path/to/voucher_083.pdf" -x -20 -y 30 99 | ``` 100 | 101 | #### Allowed font identifiers 102 | 103 | Currently the following font names are supported: 104 | - **Courier**: `courier`, `courier_bold`, `courier_oblique`, `courier_bold_oblique` 105 | - **Helvetica**: `helvetica`, `helvetica_bold`, `helvetica_oblique`, `helvetica_bold_oblique` 106 | - **Times Roman**: `times`, `times_bold`, `times_italic`, `times_bold_italic` 107 | 108 | ### Additional notes 109 | 110 | - **Specifying Colors**: write them as 6 or 3 digit hexadecilal as used in CSS, without the # 111 | 112 | - `--color`, `--font` and `--font-size` flag has no impact for Image watermarking 113 | - `--scale-*`, `--tiles` and `--opacity` flag has no impact for Text watermarking 114 | - Negative offset will set content positioning from opposite side (right for offsetX and botom from offsetY) 115 | - Text with opacity is not supported at this moment. Instead, you can [create a transperent background PNG image](http://www.picturetopeople.org/text_generator/others/transparent/transparent-text-generator.html) with your text and then use it for watermarking. 116 | 117 | ## Roadmap 118 | 119 | ✅ Draw image on every page of PDF 120 | ✅ Configure Opacity option 121 | ✅ Configure watermark position by X and Y offset 122 | ✅ Allow negative values to for offset to adjust from opposite direction 123 | ✅️ Easy option for positioning image at center 124 | ✅ Configure image rotation angle 125 | ✅ Options to Stretch watermark to page width or height, proportionately 126 | ✅ Options to Stretch watermark to page width or height at the middle of page 127 | ✅ Tile Image all over the page 128 | ✅ Render text on every page 129 | ✅ Configure text color, style and font 130 | ⏺ Configure text opacity 131 | ✅ Configure text rotation angle 132 | ✅ Text placement by offset 133 | ✅ Put text at page center 134 | 135 | ### Contribute 136 | 137 | If you fix a bug or want to add/improve a feature, 138 | and it's alligned with the focus of this tool - _watermarking PDF with ease_, 139 | I will be glad to accept your PR. :) 140 | 141 | ### Thanks 142 | 143 | This tool was made using the beautiful [Unidoc](https://unidoc.io/) library. Thanks and ❤️ to **Unidoc**. 144 | 145 | --- 146 | > "This is the Book about which there is no doubt, a guidance for those conscious of Allah" - [Al-Quran](http://quran.com) 147 | 148 | 149 | -------------------------------------------------------------------------------- /main.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "fmt" 5 | "os" 6 | "path/filepath" 7 | "text/template" 8 | 9 | flag "github.com/ogier/pflag" 10 | unicommon "github.com/unidoc/unidoc/common" 11 | "github.com/unidoc/unidoc/pdf/creator" 12 | pdf "github.com/unidoc/unidoc/pdf/model" 13 | ) 14 | 15 | var offsetX, offsetY, scaleImage, fontSize, spacing float64 16 | var scaleH, scaleW, scaleHCenter, scaleWCenter, center, tiles, verbose, version bool 17 | var opacity, angle float64 18 | var font, color string 19 | 20 | const ( 21 | VERSION = "1.0.0" 22 | ) 23 | 24 | func init() { 25 | flag.Float64VarP(&offsetX, "offset-x", "x", 0, "Offset from left (or right for negative number).") 26 | flag.Float64VarP(&offsetY, "offset-y", "y", 0, "Offset from top (or bottom for negative number).") 27 | flag.Float64VarP(&scaleImage, "scale", "p", 100, "Scale Image to desired percentage.") 28 | flag.BoolVarP(¢er, "center", "c", false, "Set position at page center. Offset X and Y will be ignored.") 29 | flag.BoolVarP(&scaleW, "scale-width", "w", false, "Scale Image to page width. If set, offset X will be ignored.") 30 | flag.BoolVarP(&scaleH, "scale-height", "h", false, "Scale Image to page height. If set, top offset Y will be ignored.") 31 | flag.BoolVarP(&scaleWCenter, "scale-width-center", "W", false, "Scale Image to page width and Y will be set at middle.") 32 | flag.BoolVarP(&scaleHCenter, "scale-height-center", "H", false, "Scale Image to page height and X will be set at middle.") 33 | 34 | flag.StringVarP(&font, "font", "f", "helvetica_bold", "Set font. Check --help for allowed name list.") 35 | flag.StringVarP(&color, "color", "l", "333333", "Set font color as 6 or 3 character hexadecimal code (without '#'). See https://www.color-hex.com") 36 | flag.Float64VarP(&fontSize, "font-size", "s", 18.0, "Font-size in points.") 37 | 38 | flag.Float64VarP(&opacity, "opacity", "o", 0.5, "Opacity of watermark. float between 0 to 1.") 39 | flag.Float64VarP(&angle, "angle", "a", 0, "Angle of rotation. between 0 to 360, counter clock-wise.") 40 | 41 | flag.BoolVarP(&tiles, "tiles", "t", false, "Repeat watermark as tiles on page. All offsets will be ignored.") 42 | flag.Float64VarP(&spacing, "spacing", "z", 0, "Repeat watermark as tiles on page. All offsets will be ignored.") 43 | 44 | flag.BoolVarP(&verbose, "verbose", "v", false, "Display debug information.") 45 | flag.BoolVarP(&version, "version", "V", false, "Display Version information.") 46 | 47 | flag.Usage = func() { 48 | fmt.Println("Usages: markpdf [options...]") 49 | fmt.Println(" and should be path to a PDF file and can be a text or path of an image.") 50 | fmt.Println("") 51 | fmt.Println("Example: markpdf \"path/to/083.pdf\" \"img/logo.png\" \"path/to/voucher_083.pdf\" -x 10 -y -30 --opacity=0.5") 52 | fmt.Println("Example: markpdf \"path/to/083.pdf\" \"img/logo.png\" \"path/to/tmp_voucher_083.pdf\" --tiles --spacing=50 --opacity=0.2") 53 | fmt.Println("Example: markpdf \"path/to/083.pdf\" \"GreatCompanyName\" \"path/to/voucher_083.pdf\" -cf times_bold_italic") 54 | fmt.Println("Example: markpdf \"path/to/083.pdf\" \"File: {{.Filename}} Page {{.Page}} of {{.Pages}}\" \"path/to/voucher_083.pdf\" --position=10,-10 --opacity=0.4") 55 | fmt.Println("") 56 | fmt.Println("Available Options: ") 57 | flag.PrintDefaults() 58 | } 59 | } 60 | 61 | type Recipient struct { 62 | Page, Pages int 63 | Filename string 64 | } 65 | 66 | func main() { 67 | flag.Parse() 68 | if version { 69 | fmt.Println("markpdf version ", VERSION) 70 | os.Exit(0) 71 | } 72 | 73 | args := flag.Args() 74 | if len(args) < 3 { 75 | flag.Usage() 76 | os.Exit(0) 77 | } 78 | 79 | if verbose { 80 | unicommon.SetLogger(unicommon.NewConsoleLogger(unicommon.LogLevelDebug)) 81 | } 82 | 83 | sourcePath := args[0] 84 | watermark := args[1] 85 | outputPath := args[2] 86 | markPDF(sourcePath, outputPath, watermark) 87 | 88 | os.Exit(0) 89 | } 90 | 91 | func markPDF(inputPath string, outputPath string, watermark string) error { 92 | debugInfo(fmt.Sprintf("Input PDF: %v", inputPath)) 93 | 94 | c := creator.New() 95 | var watermarkImg *creator.Image 96 | var para *creator.Paragraph 97 | 98 | isImageMark := isImageMark(watermark) 99 | watermarkIsATemplate := isWatermarkATemplate(watermark) 100 | 101 | // Read the input pdf file. 102 | f, err := os.Open(inputPath) 103 | fatalIfError(err, fmt.Sprintf("Failed to open the source file. [%s]", err)) 104 | defer f.Close() 105 | 106 | pdfReader, err := pdf.NewPdfReader(f) 107 | fatalIfError(err, fmt.Sprintf("Failed to parse the source file. [%s]", err)) 108 | 109 | numPages, err := pdfReader.GetNumPages() 110 | fatalIfError(err, fmt.Sprintf("Failed to get PageCount of the source file. [%s]", err)) 111 | 112 | // Prepare data to insert into the template. 113 | rec := Recipient{ 114 | Pages: numPages, 115 | Filename: filepath.Base(inputPath[:len(inputPath)-len(filepath.Ext(inputPath))]), 116 | } 117 | var t *template.Template 118 | if !isImageMark && watermarkIsATemplate { 119 | t = template.Must(template.New("watermark").Parse(watermark)) 120 | } 121 | 122 | for i := 0; i < numPages; i++ { 123 | pageNum := i + 1 124 | rec.Page = pageNum 125 | 126 | // Read the page. 127 | page, err := pdfReader.GetPage(pageNum) 128 | fatalIfError(err, fmt.Sprintf("Failed to read page from source. [%s]", err)) 129 | 130 | // Add to creator. 131 | c.AddPage(page) 132 | 133 | // Calculate the position on first page 134 | if pageNum == 1 { 135 | debugInfo(fmt.Sprintf("Page Width : %v", c.Context().PageWidth)) 136 | debugInfo(fmt.Sprintf("Page Height : %v", c.Context().PageHeight)) 137 | } 138 | 139 | if isImageMark { 140 | if pageNum == 1 { 141 | watermarkImg, err = creator.NewImageFromFile(watermark) 142 | fatalIfError(err, fmt.Sprintf("Failed to load watermark image. [%s]", err)) 143 | adjustImagePosition(watermarkImg, c) 144 | } 145 | 146 | drawImage(watermarkImg, c) 147 | 148 | } else { 149 | 150 | if pageNum == 1 { 151 | para = creator.NewParagraph(watermark) 152 | adjustTextPosition(para, c) 153 | } 154 | 155 | if watermarkIsATemplate { 156 | applyTemplate(t, &rec, para) 157 | } 158 | 159 | drawText(para, c) 160 | } 161 | } 162 | 163 | err = c.WriteToFile(outputPath) 164 | return err 165 | } 166 | 167 | func isImageMark(watermark string) bool { 168 | _, err := os.Stat(watermark) 169 | if err == nil { 170 | debugInfo(fmt.Sprintf("Watermark Image: %s", watermark)) 171 | return true 172 | } else if os.IsNotExist(err) { 173 | debugInfo(fmt.Sprintf("No file exists at: %s, assuming Text Watermark.", watermark)) 174 | } else { 175 | fmt.Printf("ERROR: File %s stat error: %v", watermark, err) 176 | os.Exit(1) 177 | } 178 | 179 | return false 180 | } 181 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU AFFERO GENERAL PUBLIC LICENSE 2 | Version 3, 19 November 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU Affero General Public License is a free, copyleft license for 11 | software and other kinds of works, specifically designed to ensure 12 | cooperation with the community in the case of network server software. 13 | 14 | The licenses for most software and other practical works are designed 15 | to take away your freedom to share and change the works. By contrast, 16 | our General Public Licenses are intended to guarantee your freedom to 17 | share and change all versions of a program--to make sure it remains free 18 | software for all its users. 19 | 20 | When we speak of free software, we are referring to freedom, not 21 | price. Our General Public Licenses are designed to make sure that you 22 | have the freedom to distribute copies of free software (and charge for 23 | them if you wish), that you receive source code or can get it if you 24 | want it, that you can change the software or use pieces of it in new 25 | free programs, and that you know you can do these things. 26 | 27 | Developers that use our General Public Licenses protect your rights 28 | with two steps: (1) assert copyright on the software, and (2) offer 29 | you this License which gives you legal permission to copy, distribute 30 | and/or modify the software. 31 | 32 | A secondary benefit of defending all users' freedom is that 33 | improvements made in alternate versions of the program, if they 34 | receive widespread use, become available for other developers to 35 | incorporate. Many developers of free software are heartened and 36 | encouraged by the resulting cooperation. 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Remote Network Interaction; Use with the GNU General Public License. 541 | 542 | Notwithstanding any other provision of this License, if you modify the 543 | Program, your modified version must prominently offer all users 544 | interacting with it remotely through a computer network (if your version 545 | supports such interaction) an opportunity to receive the Corresponding 546 | Source of your version by providing access to the Corresponding Source 547 | from a network server at no charge, through some standard or customary 548 | means of facilitating copying of software. This Corresponding Source 549 | shall include the Corresponding Source for any work covered by version 3 550 | of the GNU General Public License that is incorporated pursuant to the 551 | following paragraph. 552 | 553 | Notwithstanding any other provision of this License, you have 554 | permission to link or combine any covered work with a work licensed 555 | under version 3 of the GNU General Public License into a single 556 | combined work, and to convey the resulting work. The terms of this 557 | License will continue to apply to the part which is the covered work, 558 | but the work with which it is combined will remain governed by version 559 | 3 of the GNU General Public License. 560 | 561 | 14. Revised Versions of this License. 562 | 563 | The Free Software Foundation may publish revised and/or new versions of 564 | the GNU Affero General Public License from time to time. Such new versions 565 | will be similar in spirit to the present version, but may differ in detail to 566 | address new problems or concerns. 567 | 568 | Each version is given a distinguishing version number. If the 569 | Program specifies that a certain numbered version of the GNU Affero General 570 | Public License "or any later version" applies to it, you have the 571 | option of following the terms and conditions either of that numbered 572 | version or of any later version published by the Free Software 573 | Foundation. If the Program does not specify a version number of the 574 | GNU Affero General Public License, you may choose any version ever published 575 | by the Free Software Foundation. 576 | 577 | If the Program specifies that a proxy can decide which future 578 | versions of the GNU Affero General Public License can be used, that proxy's 579 | public statement of acceptance of a version permanently authorizes you 580 | to choose that version for the Program. 581 | 582 | Later license versions may give you additional or different 583 | permissions. However, no additional obligations are imposed on any 584 | author or copyright holder as a result of your choosing to follow a 585 | later version. 586 | 587 | 15. Disclaimer of Warranty. 588 | 589 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 590 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 591 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 592 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 593 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 594 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 595 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 596 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 597 | 598 | 16. Limitation of Liability. 599 | 600 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 601 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 602 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 603 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 604 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 605 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 606 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 607 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 608 | SUCH DAMAGES. 609 | 610 | 17. Interpretation of Sections 15 and 16. 611 | 612 | If the disclaimer of warranty and limitation of liability provided 613 | above cannot be given local legal effect according to their terms, 614 | reviewing courts shall apply local law that most closely approximates 615 | an absolute waiver of all civil liability in connection with the 616 | Program, unless a warranty or assumption of liability accompanies a 617 | copy of the Program in return for a fee. 618 | 619 | END OF TERMS AND CONDITIONS 620 | 621 | How to Apply These Terms to Your New Programs 622 | 623 | If you develop a new program, and you want it to be of the greatest 624 | possible use to the public, the best way to achieve this is to make it 625 | free software which everyone can redistribute and change under these terms. 626 | 627 | To do so, attach the following notices to the program. It is safest 628 | to attach them to the start of each source file to most effectively 629 | state the exclusion of warranty; and each file should have at least 630 | the "copyright" line and a pointer to where the full notice is found. 631 | 632 | 633 | Copyright (C) 634 | 635 | This program is free software: you can redistribute it and/or modify 636 | it under the terms of the GNU Affero General Public License as published 637 | by the Free Software Foundation, either version 3 of the License, or 638 | (at your option) any later version. 639 | 640 | This program is distributed in the hope that it will be useful, 641 | but WITHOUT ANY WARRANTY; without even the implied warranty of 642 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 643 | GNU Affero General Public License for more details. 644 | 645 | You should have received a copy of the GNU Affero General Public License 646 | along with this program. If not, see . 647 | 648 | Also add information on how to contact you by electronic and paper mail. 649 | 650 | If your software can interact with users remotely through a computer 651 | network, you should also make sure that it provides a way for users to 652 | get its source. For example, if your program is a web application, its 653 | interface could display a "Source" link that leads users to an archive 654 | of the code. There are many ways you could offer source, and different 655 | solutions will be better for different programs; see section 13 for the 656 | specific requirements. 657 | 658 | You should also get your employer (if you work as a programmer) or school, 659 | if any, to sign a "copyright disclaimer" for the program, if necessary. 660 | For more information on this, and how to apply and follow the GNU AGPL, see 661 | . 662 | --------------------------------------------------------------------------------