Merge pull request #143 from fairygui/dev_atlas_ref_count

Add Atlas reference manage mechanism

Author: xiaoguzhu

Assets/Scripts/Core/NGraphics.cs

@@ -183,6 +183,11 @@ public NTexture texture
             {
                 if (_texture != value)
                 {
+                    if (value != null)
+                        value.AddRef();
+                    if (_texture != null)
+                        _texture.ReleaseRef();
+
                     _texture = value;
                     if (_customMatarial != 0 && _material != null)
                         _material.mainTexture = _texture != null ? _texture.nativeTexture : null;
@@ -213,11 +218,10 @@ public string shader
         public void SetShaderAndTexture(string shader, NTexture texture)
         {
             _shader = shader;
-            _texture = texture;
-            if (_customMatarial != 0 && _material != null)
-                _material.mainTexture = _texture != null ? _texture.nativeTexture : null;
-            _meshDirty = true;
-            UpdateManager();
+            if (_texture != texture)
+                this.texture = texture;
+            else
+                UpdateManager();
         }
 
         /// <summary>
@@ -508,6 +512,12 @@ public void Dispose()
             if ((_customMatarial & 128) != 0 && _material != null)
                 Object.DestroyImmediate(_material);
 
+            if (_texture != null)
+            {
+                _texture.ReleaseRef();
+                _texture = null;
+            }
+
             _manager = null;
             _material = null;
             meshRenderer = null;

Assets/Scripts/Core/NTexture.cs

@@ -22,7 +22,10 @@ public enum DestroyMethod
     /// </summary>
     public class NTexture
     {
-        public static Action<Texture> CustomDestroyMethod;
+        /// <summary>
+        /// This event will trigger when a texture is destroying if its destroyMethod is Custom
+        /// </summary>
+        public static event Action<Texture> CustomDestroyMethod;
 
         /// <summary>
         /// 
@@ -50,9 +53,14 @@ public class NTexture
         public DestroyMethod destroyMethod;
 
         /// <summary>
-        /// 
+        /// This event will trigger when texture reloaded and size changed.
+        /// </summary>
+        public event Action<NTexture> onSizeChanged;
+
+        /// <summary>
+        /// This event will trigger when ref count is zero.
         /// </summary>
-        public event Action onSizeChanged;
+        public event Action<NTexture> onRelease;
 
         Texture _nativeTexture;
         Texture _alphaTexture;
@@ -407,7 +415,7 @@ public void Reload(Texture nativeTexture, Texture alphaTexture)
             RefreshMaterials();
 
             if (onSizeChanged != null && lastSize != _originalSize)
-                onSizeChanged();
+                onSizeChanged(this);
         }
 
         void DestroyTexture()
@@ -467,6 +475,34 @@ void DestroyMaterials()
             }
         }
 
+        public void AddRef()
+        {
+            if (_root == null) //disposed
+                return;
+
+            if (_root != this && refCount == 0)
+                _root.AddRef();
+
+            refCount++;
+        }
+
+        public void ReleaseRef()
+        {
+            if (_root == null) //disposed
+                return;
+
+            refCount--;
+
+            if (refCount == 0)
+            {
+                if (_root != this)
+                    _root.ReleaseRef();
+
+                if (onRelease != null)
+                    onRelease(this);
+            }
+        }
+
         /// <summary>
         /// 
         /// </summary>
@@ -479,6 +515,7 @@ public void Dispose()
                 Unload(true);
             _root = null;
             onSizeChanged = null;
+            onRelease = null;
         }
     }
 }

Assets/Scripts/UI/GLoader.cs

@@ -23,7 +23,7 @@ public class GLoader : GObject, IAnimationGear, IColorGear
         bool _shrinkOnly;
         bool _updatingLayout;
         PackageItem _contentItem;
-        Action _reloadDelegate;
+        Action<NTexture> _reloadDelegate;
 
         MovieClip _content;
         GObject _errorSign;
@@ -471,10 +471,10 @@ protected void onExternalLoadFailed()
             SetErrorState();
         }
 
-        void OnExternalReload()
+        void OnExternalReload(NTexture texture)
         {
-            sourceWidth = _content.texture.width;
-            sourceHeight = _content.texture.height;
+            sourceWidth = texture.width;
+            sourceHeight = texture.height;
             UpdateLayout();
         }
 

Assets/Scripts/UI/UIPackage.cs

@@ -10,7 +10,7 @@
 namespace FairyGUI
 {
     /// <summary>
-    /// A UI Package contains a description file and some texture,sound assets.
+    /// A UI Package contains a description file and some texture, sound assets.
     /// </summary>
     public class UIPackage
     {
@@ -21,6 +21,11 @@ public class UIPackage
         /// </summary>
         public static bool unloadBundleByFGUI = true;
 
+        /// <summary>
+        /// The event is triggered when all reference to this package item dropped.
+        /// </summary>
+        public static event Action<PackageItem> onReleaseResource;
+
         /// <summary>
         /// Package id. It is generated by the Editor.
         /// </summary>
@@ -1319,7 +1324,14 @@ void LoadAtlas(PackageItem item)
                 }
 
                 if (item.texture == null)
+                {
                     item.texture = new NTexture(tex, alphaTex, (float)tex.width / item.width, (float)tex.height / item.height);
+                    item.texture.onRelease += (NTexture t) =>
+                    {
+                        if (onReleaseResource != null)
+                            onReleaseResource(item);
+                    };
+                }
                 else
                     item.texture.Reload(tex, alphaTex);
                 item.texture.destroyMethod = dm;