More efficient draw order when bind pose order is keyed.

spine-csharp/src/Animation.cs

@@ -513,7 +513,8 @@ namespace Spine {
 			drawOrders = new int[frameCount][];
 		}
 
-		/** Sets the time and value of the specified keyframe. */
+		/** Sets the time and value of the specified keyframe.
+		 * @param drawOrder May be null to use bind pose draw order. */
 		public void setFrame (int frameIndex, float time, int[] drawOrder) {
 			frames[frameIndex] = time;
 			drawOrders[frameIndex] = drawOrder;
@@ -532,8 +533,13 @@ namespace Spine {
 			List<Slot> drawOrder = skeleton.drawOrder;
 			List<Slot> slots = skeleton.slots;
 			int[] drawOrderToSetupIndex = drawOrders[frameIndex];
+			if (drawOrderToSetupIndex == null) {
+				drawOrder.Clear();
+				drawOrder.AddRange(slots);
+			} else {
 				for (int i = 0, n = drawOrderToSetupIndex.Length; i < n; i++)
 					drawOrder[i] = slots[drawOrderToSetupIndex[i]];
 			}
 		}
 	}
+}

spine-csharp/src/SkeletonJson.cs

@@ -372,7 +372,9 @@ namespace Spine {
 				int slotCount = skeletonData.slots.Count;
 				int frameIndex = 0;
 				foreach (Dictionary<String, Object> drawOrderMap in values) {
-					int[] drawOrder = new int[slotCount];
+					int[] drawOrder = null;
+					if (drawOrderMap.ContainsKey("offsets")) {
+						drawOrder = new int[slotCount];
 						for (int i = slotCount - 1; i >= 0; i--)
 							drawOrder[i] = -1;
 						List<Object> offsets = (List<Object>)drawOrderMap["offsets"];
@@ -393,6 +395,7 @@ namespace Spine {
 						// Fill in unchanged items.
 						for (int i = slotCount - 1; i >= 0; i--)
 							if (drawOrder[i] == -1) drawOrder[i] = unchanged[--unchangedIndex];
+					}
 					timeline.setFrame(frameIndex++, (float)drawOrderMap["time"], drawOrder);
 				}
 				timelines.Add(timeline);

spine-libgdx/src/com/esotericsoftware/spine/Animation.java

@@ -594,7 +594,8 @@ public class Animation {
 			return drawOrders;
 		}
 
-		/** Sets the time of the specified keyframe. */
+		/** Sets the time of the specified keyframe.
+		 * @param drawOrder May be null to use bind pose draw order. */
 		public void setFrame (int frameIndex, float time, int[] drawOrder) {
 			frames[frameIndex] = time;
 			drawOrders[frameIndex] = drawOrder;
@@ -613,8 +614,12 @@ public class Animation {
 			Array<Slot> drawOrder = skeleton.drawOrder;
 			Array<Slot> slots = skeleton.slots;
 			int[] drawOrderToSetupIndex = drawOrders[frameIndex];
+			if (drawOrderToSetupIndex == null)
+				System.arraycopy(slots.items, 0, drawOrder.items, 0, slots.size);
+			else {
 				for (int i = 0, n = drawOrderToSetupIndex.length; i < n; i++)
 					drawOrder.set(i, slots.get(drawOrderToSetupIndex[i]));
 			}
 		}
 	}
+}

spine-libgdx/src/com/esotericsoftware/spine/SkeletonJson.java

@@ -320,12 +320,15 @@ public class SkeletonJson {
 			int slotCount = skeletonData.slots.size;
 			int frameIndex = 0;
 			for (JsonValue drawOrderMap = drawOrdersMap.child; drawOrderMap != null; drawOrderMap = drawOrderMap.next()) {
-				int[] drawOrder = new int[slotCount];
+				int[] drawOrder = null;
+				JsonValue offsets = drawOrderMap.get("offsets");
+				if (offsets != null) {
+					drawOrder = new int[slotCount];
 					for (int i = slotCount - 1; i >= 0; i--)
 						drawOrder[i] = -1;
-				int[] unchanged = new int[slotCount - drawOrderMap.get("offsets").size];
+					int[] unchanged = new int[slotCount - offsets.size];
 					int originalIndex = 0, unchangedIndex = 0;
-				for (JsonValue offsetMap = drawOrderMap.getChild("offsets"); offsetMap != null; offsetMap = offsetMap.next()) {
+					for (JsonValue offsetMap = offsets.child; offsetMap != null; offsetMap = offsetMap.next()) {
 						int slotIndex = skeletonData.findSlotIndex(offsetMap.getString("slot"));
 						if (slotIndex == -1) throw new SerializationException("Slot not found: " + offsetMap.getString("slot"));
 						// Collect unchanged items.
@@ -340,6 +343,7 @@ public class SkeletonJson {
 					// Fill in unchanged items.
 					for (int i = slotCount - 1; i >= 0; i--)
 						if (drawOrder[i] == -1) drawOrder[i] = unchanged[--unchangedIndex];
+				}
 				timeline.setFrame(frameIndex++, drawOrderMap.getFloat("time"), drawOrder);
 			}
 			timelines.add(timeline);

spine-libgdx/test/spineboy.json

@@ -300,17 +300,7 @@
 					{ "slot": "eyes", "offset": 3 }
 				]
 			},
-			{
-				"time": 2.6206,
-				"offsets": [
-					{ "slot": "head", "offset": -12 },
-					{ "slot": "eyes", "offset": -12 }
-				]
-			},
-			{
-				"time": 3.5862,
-				"offsets": []
-			}
+			{ "time": 2 }
 		]
 	},
 	"jump": {

spine-xna/example/data/spineboy.json

@@ -307,10 +307,7 @@
 					{ "slot": "eyes", "offset": -12 }
 				]
 			},
-			{
-				"time": 3.5862,
-				"offsets": []
-			}
+			{ "time": 3.5862 }
 		]
 	},
 	"jump": {