Merge pull request #539 from JD557/reduce-boxing

Reduce boxing overhead

core/shared/src/main/scala/eu/joaocosta/minart/graphics/Plane.scala

@@ -46,7 +46,10 @@ trait Plane extends Function2[Int, Int, Color] { outer =>
     new Plane {
       def getPixel(x: Int, y: Int): Color = {
         val c1 = outer.getPixel(x, y)
-        that.getPixel(x, y).fold(c1)(c2 => f(c1, c2))
+        if (x >= 0 && y >= 0 && x < that.width && y < that.height) {
+          val c2 = that.unsafeGetPixel(x, y)
+          f(c1, c2)
+        } else c1
       }
     },
     width = that.width,

core/shared/src/main/scala/eu/joaocosta/minart/graphics/Surface.scala

@@ -59,9 +59,24 @@ trait Surface {
     * @return color matrix
     */
   def getPixels(): Vector[Array[Color]] = {
-    Vector.tabulate(height) { y =>
-      Array.tabulate(width)(x => unsafeGetPixel(x, y))
+    val b = Vector.newBuilder[Array[Color]]
+    b.sizeHint(height)
+    var y = 0
+    while (y < height) {
+      if (width <= 0) {
+        b += Array.empty[Color]
+      } else {
+        val array = new Array[Color](width)
+        var x     = 0
+        while (x < width) {
+          array(x) = unsafeGetPixel(x, y)
+          x += 1
+        }
+        b += array
+      }
+      y += 1
     }
+    b.result()
   }
 
   /** Copies this surface into a new surface stored in RAM. */