Not all font characters will display when painted with :graphics

[JanSuran03]

Not all font characters of my native (Czech) language will display when painted with :graphics. But if I create a blank JFrame with Canvas it all works fine. I don't know what I have to set up to make it work...

(let [a4-width (.getWidth PageSize/A4)
      name-label-height 150]
  (pdf [{:font {:encoding :unicode
                :ttf-name "fonts/arialuni.ttf"
                :size     50}}
        [:graphics
         (fn [^Graphics2D g2d]
           (doto g2d
             (.setColor (Color. 0 255 255)
             (.fillRect 0 0 a4-width name-label-height)
             (.setFont (Font. "Calibri" Font/BOLD 50))
             (.setColor Color/BLACK)
             (.drawString "ěščůéúť" 20 60)))]
        [:paragraph (apply str (repeat 8 "ěščřžýáíéóťďůú\n"))]]))

(let [canvas (proxy [Canvas] []
               (paint [^Graphics g]
                (doto g
                   (.setColor Color/RED)
                   (.fillRect 100 100 400 250)
                   (.setFont (Font. "Calibri" Font/BOLD 40))
                   (.drawString "ěščůúť" 450 80))))]
  (doto (proxy [JFrame] [])
    (.add canvas)
    (.setVisible true)
    (.setBounds 500 500 1000 600)))

[yogthos]

Not sure what the solution would be here. Have you tried using a different TTF font?

[JanSuran03]

Well, the thing is, it works for paragprahs, but it doesn't work for Graphics2D. On the other hand, it works for Graphics2D for the second example.

[JanSuran03]

And by the way, I don't even know if the font exists... (without :ttf-name some of the characters don't display but with an invalid :ttf-name they do? :D

[yogthos]

Setting the encoding might help, here's the function that attempts to resolve the font.

[JanSuran03]

The encoding is there, but it still doesn't affect anything.

[yogthos]

Unfortunately, not sure what to do here. I'm open to a PR if you do figure it out though. :)

[JanSuran03]

Oh, the same bug appears in the Quil (https://github.com/quil/quil) library.
I can set the text mode to :shape which works fine, it just doesn't act like text at all (as an image instead - cannot be selected etc.) or :model which allows me to interact with it, however, it doesn't display all the characters. Hmm 🤔

[yogthos]

Might be an underlying issue in Java graphics implementation. Wonder if using SVG might be a workaround here.

[yannis218]

I am experiencing the same issue: The non-ASCII characters appear when drawn into the Graphics2D of my JPanel, but not in the Graphics2D of the PDF :graphics element. If it were a problem with Graphics2D itself, would it not fail in both instances?

[yogthos]

Not really sure what the difference between rendering to a JPanel vs the graphics element is unfortunately.