new runes impl and test

Former-commit-id: f92f6d528128ed19aadffee7e112daa5736d50e3

src/net/torvald/imagefont/NewRunes.kt

@@ -0,0 +1,56 @@
+package net.torvald.imagefont
+
+import org.newdawn.slick.Color
+import org.newdawn.slick.Font
+import org.newdawn.slick.SpriteSheet
+
+/**
+ * Created by SKYHi14 on 2017-03-24.
+ */
+class NewRunes : Font {
+    private val runeSize = 12
+
+    private val encPlane = IntArray(128, {
+        if (it < 0x10)
+            0x20 + it
+        else if (it < 0x30)
+            0x3000 + (it - 0x20)
+        else
+            0x3130 + (it - 0x30)
+    })
+
+    private fun codeToEnc(c: Char): Int? {
+        val result =  encPlane.binarySearch(c.toInt())
+        return if (result >= 0) result else null
+    }
+
+    private val runes = SpriteSheet("./assets/graphics/fonts/newrunes.tga", runeSize, runeSize)
+
+    var scale = 1
+    var linegap = 8
+
+
+    override fun getHeight(str: String) = 12
+
+    override fun drawString(x: Float, y: Float, text: String) = drawString(x, y, text, Color.white)
+
+    override fun drawString(x: Float, y: Float, text: String, col: Color) {
+        text.forEachIndexed { index, c ->
+            val encodePoint = codeToEnc(c)
+
+            if (encodePoint != null) {
+                runes.getSubImage(encodePoint % 16, encodePoint / 16).draw(
+                        x + runeSize * index * scale, y, scale.toFloat(), col
+                )
+            }
+        }
+    }
+
+    override fun drawString(x: Float, y: Float, text: String, col: Color, startIndex: Int, endIndex: Int) {
+        UnsupportedOperationException("not implemented")
+    }
+
+    override fun getWidth(str: String) = runeSize * str.length
+
+    override fun getLineHeight() = (runeSize + linegap) * scale
+}