implementation of Pie Menu

Former-commit-id: 0ff65782d25f0bf73435d297cf70d93e80882090
Former-commit-id: c31e1675890bb098addd2467f1137cb20038ec7d

src/net/torvald/terrarum/ui/ItemSlotImageBuilder.kt

@@ -0,0 +1,52 @@
+package net.torvald.terrarum.ui
+
+import net.torvald.terrarum.setBlendNormal
+import org.newdawn.slick.Color
+import org.newdawn.slick.Image
+import org.newdawn.slick.SpriteSheet
+import org.newdawn.slick.SpriteSheetFont
+
+/**
+ * Make item slot image with number on bottom-right
+ *
+ * Created by minjaesong on 16-07-20.
+ */
+object ItemSlotImageBuilder {
+
+    const val COLOR_BLACK = 1
+    const val COLOR_WHITE = 2
+
+    private val colourBlack = Color(0x404040)
+    private val colourWhite = Color(0xC0C0C0)
+
+    private val numberFont = SpriteSheetFont(
+            SpriteSheet("./res/graphics/fonts/numeric_small.png", 5, 8),
+            '0'
+    )
+    private val slotImage = Image("./res/graphics/gui/quickbar/item_slot.png")
+    private val canvas = Image(slotImage.width, slotImage.height)
+
+    fun produce(color: Int, number: Int = -1): Image {
+        if (color == COLOR_BLACK)
+            canvas.graphics.drawImage(slotImage, 0f, 0f, colourBlack)
+        else if (color == COLOR_WHITE)
+            canvas.graphics.drawImage(slotImage, 0f, 0f, colourWhite)
+
+        if (number >= 0) {
+            canvas.graphics.font = numberFont
+
+            if (color == COLOR_BLACK)
+                canvas.graphics.color = colourWhite
+            else if (color == COLOR_WHITE)
+                canvas.graphics.color = colourBlack
+
+            canvas.graphics.drawString(number.mod(UIQuickBar.SLOT_COUNT).toString(),
+                    slotImage.width - 6f,
+                    slotImage.height - 10f
+            )
+        }
+
+        return canvas
+    }
+
+}