LibGDX, here I am.

src/net/torvald/terrarum/imagefont/Watch7SegSmall.kt

@@ -0,0 +1,42 @@
+package net.torvald.terrarum.imagefont
+
+import com.badlogic.gdx.graphics.g2d.Batch
+import com.badlogic.gdx.graphics.g2d.BitmapFont
+import com.badlogic.gdx.graphics.g2d.GlyphLayout
+import net.torvald.terrarum.ModMgr
+import net.torvald.terrarumsansbitmap.gdx.TextureRegionPack
+
+/**
+ * Created by minjaesong on 2017-06-21.
+ */
+object Watch7SegSmall : BitmapFont() {
+    val charMapping = (' '..'9')
+
+    internal val W = 9
+    internal val H = 12
+
+    internal val fontSheet = TextureRegionPack(ModMgr.getGdxFile("basegame", "fonts/7seg_small.tga"), W, H)
+
+    init {
+        setOwnsTexture(true)
+    }
+
+    override fun draw(batch: Batch, str: CharSequence, x: Float, y: Float): GlyphLayout? {
+
+        str.forEachIndexed { index, c ->
+            if (c in charMapping) {
+                batch.draw(
+                        fontSheet.get((c - ' ') % 16, (c - ' ') / 16),
+                        x + W * index, y
+                )
+            }
+        }
+
+
+        return null
+    }
+
+    override fun getLineHeight() = H.toFloat()
+    override fun getCapHeight() = getLineHeight()
+    override fun getXHeight() = getLineHeight()
+}