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javaclojureopentype

Generating Image in Java/Clojure containing text that uses OpenType Features

I am trying to generate an image using Java/Clojure made up mainly of text that uses a custom font with opentype features. I have tried to use the current OTF Font support in Java even upgraded to oracle Java 8 and set the TextAttribute Ligatures to On but to no help. Can anyone provide suggestions on what is possible.

Note I need the ability to determine font-size, line-height and width of image so I am not sure if using TEX is possible in that situation.

Solution

  • I believe the answer for the Java side was answered in this SO question. But I did a translation to Clojure because java interop gets a bit tricky. Notice that ImageIO/write takes the BufferedImage instance not the Graphics2D, throughout the program image gets mutated using an instance of Graphics2D. 

    (ns so-33725486.core
  (:import [java.awt Graphics2D Color Font]
           [java.awt.image BufferedImage]
           [javax.imageio ImageIO]
           [java.io File]))

(defn str->img [string filename]
  (let [file (File. (str "./" filename ".png"))
        width 250
        height 100
        image (BufferedImage. width height BufferedImage/TYPE_INT_ARGB)
        graphics (.createGraphics image)
        font-size 30
        font (Font. "TimesRoman" Font/BOLD font-size)]
    (.setColor graphics Color/BLACK)
    (.setFont graphics font)
    (.drawString graphics string 10 25)
    (ImageIO/write image "png" file)))