Add quad inflation to SpritesheetScaler

Assets/Editor/SpritesheetScaler.cs

@@ -2,45 +2,64 @@ using UnityEngine;
 using UnityEditor;
 using System.Collections.Generic;
 
-public class SpritesheetScaler : EditorWindow {
+public class SpritesheetScaler : EditorWindow
+{
 
     Object source;
     int multiplier = 1;
+    int inflateX = 0;
+    int inflateY = 0;
 
     // Creates a new option in "Windows"
-   [MenuItem ("Window/Scale spritesheet pivots and slices")]
-   static void Init () {
+    [MenuItem("Window/Scale spritesheet pivots and slices")]
+    static void Init()
+    {
         // Get existing open window or if none, make a new one:
-     SpritesheetScaler window = (SpritesheetScaler)EditorWindow.GetWindow (typeof (SpritesheetScaler));
+        SpritesheetScaler window = (SpritesheetScaler)EditorWindow.GetWindow(typeof(SpritesheetScaler));
         window.Show();
     }
 
-   void OnGUI () {
-     GUILayout.BeginHorizontal ();
-     GUILayout.Label ("Source texture:", EditorStyles.boldLabel);
+    void OnGUI()
+    {
+        GUILayout.BeginHorizontal();
+        GUILayout.Label("Source texture:", EditorStyles.boldLabel);
         source = EditorGUILayout.ObjectField(source, typeof(Texture2D), false, GUILayout.Width(220));
-     GUILayout.EndHorizontal ();
+        GUILayout.EndHorizontal();
 
-     GUILayout.BeginHorizontal ();
-     GUILayout.Label ("Multiplier:", EditorStyles.boldLabel);
+        GUILayout.BeginHorizontal();
+        GUILayout.Label("Multiplier:", EditorStyles.boldLabel);
         multiplier = EditorGUILayout.IntField(multiplier, GUILayout.Width(220));
-     GUILayout.EndHorizontal ();
+        GUILayout.EndHorizontal();
 
-     GUILayout.Space (25f);
-     if (GUILayout.Button ("Scale pivots and slices")) {
+        GUILayout.Space(5f);
+        GUILayout.BeginHorizontal();
+        GUILayout.Label("Inflate Quads:", EditorStyles.boldLabel);
+        GUILayout.EndHorizontal();
+        GUILayout.BeginHorizontal();
+        GUILayout.Label("X", EditorStyles.label);
+        inflateX = EditorGUILayout.IntField(inflateX, GUILayout.Width(220/2));
+        GUILayout.Label("Y", EditorStyles.label);
+        inflateY = EditorGUILayout.IntField(inflateY, GUILayout.Width(220/2));
+        GUILayout.EndHorizontal();
+
+        GUILayout.Space(25f);
+        if (GUILayout.Button("Scale pivots and slices"))
+        {
             ScalePivotsAndSlices();
         }
     }
 
     void ScalePivotsAndSlices()
     {
-     if (!source || (multiplier <= 0)) {
+        if (!source || (multiplier <= 0))
+        {
             Debug.Log("Missing one object");
             return;
         }
 
-     if (source.GetType () != typeof(Texture2D)) {
-       Debug.Log (source + "needs to be Texture2D!");
+        if (source.GetType() != typeof(Texture2D))
+        {
+            Debug.Log(source + "needs to be Texture2D!");
             return;
         }
 
@@ -51,13 +70,27 @@ public class SpritesheetScaler : EditorWindow {
 
         ti1.spritePixelsPerUnit *= multiplier;
 
-     List <SpriteMetaData> newData = new List <SpriteMetaData> ();
+        List<SpriteMetaData> newData = new List<SpriteMetaData>();
 
-     Debug.Log ("Amount of slices found: " + ti1.spritesheet.Length);
+        Debug.Log("Amount of slices found: " + ti1.spritesheet.Length);
 
-     for (int i = 0; i < ti1.spritesheet.Length; i++) {
+        for (int i = 0; i < ti1.spritesheet.Length; i++)
+        {
             SpriteMetaData d = ti1.spritesheet[i];
-       d.rect = ScaleRect(d.rect, multiplier);
+            Vector2 oldPivot = Rect.NormalizedToPoint(d.rect, d.pivot) * multiplier;
+            d.rect = ScaleRect(d.rect, multiplier, inflateX, inflateY);
+
+            d.border.x += d.border.x > 0 ? inflateX : 0;
+            d.border.y += d.border.y > 0 ? inflateY : 0;
+            d.border.z += d.border.z > 0 ? inflateX : 0;
+            d.border.w += d.border.w > 0 ? inflateY : 0;
+
+            if (inflateX > 0 || inflateY > 0)
+            {
+                d.alignment = (int)SpriteAlignment.Custom;
+                d.pivot = Rect.PointToNormalized(d.rect, oldPivot);
+            }
+
             d.border *= multiplier;
             newData.Add(d);
         }
@@ -69,10 +102,10 @@ public class SpritesheetScaler : EditorWindow {
         AssetDatabase.ImportAsset(sourcePath, ImportAssetOptions.ForceUpdate);
     }
 
-   Rect ScaleRect(Rect source, int mult)
+    Rect ScaleRect(Rect source, int mult, int inflateX, int inflateY)
     {
         var newRect = new Rect();
-       newRect.Set(source.x * mult, source.y * mult, source.width * mult, source.height * mult);
+        newRect.Set((source.x - inflateX) * mult, (source.y - inflateY) * mult, (source.width + inflateX*2) * mult, (source.height + inflateY*2) * mult);
         return newRect;
     }
 }