Add NinePatchTexture and NinePatchView

src/main/kotlin/net/shadowfacts/cacao/util/NinePatchTexture.kt

@@ -1,7 +1,17 @@
 package net.shadowfacts.cacao.util
 
 /**
+ * Helper class that represents a texture that can be divided into nine pieces (4 corners, 4 edges, and the center)
+ * and can be drawn at any size by combining and repeating those pieces.
+ *
+ * It also provides convenience [Texture] objects that represent the different patches.
+ *
  * @author shadowfacts
+ * @param texture The base [Texture] object.
+ * @param cornerWidth The width of each corner (and therefore the width of the vertical edges).
+ * @param cornerHeight The height of each corner (and therefore the height of the horizontal edges.)
+ * @param centerWidth The width of the center patch.
+ * @param centerHeight The height of the center patch.
  */
 data class NinePatchTexture(val texture: Texture, val cornerWidth: Int, val cornerHeight: Int, val centerWidth: Int, val centerHeight: Int) {
 

src/main/kotlin/net/shadowfacts/cacao/view/NinePatchView.kt

@@ -6,7 +6,11 @@ import net.shadowfacts.cacao.util.NinePatchTexture
 import net.shadowfacts.cacao.util.RenderHelper
 
 /**
+ * A helper class for drawing a [NinePatchTexture] in a view.
+ * `NinePatchView` will draw the given nine patch texture filling its bounds.
+ *
  * @author shadowfacts
+ * @param ninePatch The nine patch texture that this view will draw.
  */
 class NinePatchView(val ninePatch: NinePatchTexture): View() {