From 5ed1e48cb2c4bc41ec165da0212887de9935d774 Mon Sep 17 00:00:00 2001
From: "valtain@gmail.com" <valtain@gmail.com>
Date: Sat, 24 Dec 2016 05:18:01 +0900
Subject: [PATCH] Recomit softmask fix

--HG--
branch : develop_5.3
---
 Scripts/Effects/SoftMaskScript.cs | 189 ++++++------------------------
 Shaders/SoftMaskShader.shader     |  49 ++++----
 Shaders/SoftMaskShaderText.shader | 140 +---------------------
 3 files changed, 61 insertions(+), 317 deletions(-)

diff --git a/Scripts/Effects/SoftMaskScript.cs b/Scripts/Effects/SoftMaskScript.cs
index 080462b..2d13b56 100644
--- a/Scripts/Effects/SoftMaskScript.cs
+++ b/Scripts/Effects/SoftMaskScript.cs
@@ -8,15 +8,12 @@ namespace UnityEngine.UI.Extensions
     public class SoftMaskScript : MonoBehaviour
     {
         Material mat;
-        Canvas canvas;
+        Canvas cachedCanvas= null;
 
         [Tooltip("The area that is to be used as the container.")]
         public RectTransform MaskArea;
         RectTransform myRect;
 
-        [Tooltip("A Rect Transform that can be used to scale and move the mask - Does not apply to Text UI Components being masked")]
-        public RectTransform maskScalingRect;
-
         [Tooltip("Texture to be used to do the soft alpha")]
         public Texture AlphaMask;
 
@@ -30,27 +27,12 @@ namespace UnityEngine.UI.Extensions
         [Tooltip("Flip the masks alpha value")]
         public bool FlipAlphaMask = false;
 
-        [Tooltip("If Mask Scaling Rect is given and this value is true, the area around the mask will not be clipped")]
+        [Tooltip("If Mask Scals Rect is given, and this value is true, the area around the mask will not be clipped")]
         public bool DontClipMaskScalingRect = false;
 
-        [Tooltip("If set to true, this mask is applied to all child Text and Graphic objects belonging to this object.")]
-        public bool CascadeToALLChildren;
-        Vector3[] worldCorners;
-
-        Vector2 AlphaUV;
-
-        Vector2 min;
-        Vector2 max = Vector2.one;
-        Vector2 p;
-        Vector2 siz;
-        Vector2 tp = new Vector2(.5f, .5f);
-
-
-        bool MaterialNotSupported; // UI items like toggles, we can stil lcascade down to them though :)
-        Rect maskRect;
-        Rect contentRect;
-
-        Vector2 centre;
+        Vector3[] worldCorners = new Vector3[4];
+        Vector2 maskOffset = Vector2.zero;
+        Vector2 maskScale = Vector2.one;
 
         bool isText = false;
 
@@ -59,167 +41,68 @@ namespace UnityEngine.UI.Extensions
         {
             myRect = GetComponent<RectTransform>();
 
-            if (!MaskArea)
+            if (MaskArea == null)
             {
                 MaskArea = myRect;
             }
 
-            if (GetComponent<Graphic>() != null)
-            {
-                mat = new Material(Shader.Find("UI Extensions/SoftMaskShader"));
-                GetComponent<Graphic>().material = mat;
-            }
-
-            if (GetComponent<Text>())
+            var text = GetComponent<Text>();
+            if (text != null)
             {
                 isText = true;
                 mat = new Material(Shader.Find("UI Extensions/SoftMaskShaderText"));
-                GetComponent<Text>().material = mat;
-
-                GetCanvas();
+                text.material = mat;
+                cachedCanvas = text.canvas;
 
                 // For some reason, having the mask control on the parent and disabled stops the mouse interacting
                 // with the texture layer that is not visible.. Not needed for the Image.
-                if (transform.parent.GetComponent<Button>() == null && transform.parent.GetComponent<Mask>() == null)
+                if (transform.parent.GetComponent<Mask>() == null)
                     transform.parent.gameObject.AddComponent<Mask>();
 
-                if (transform.parent.GetComponent<Mask>() != null)
-                    transform.parent.GetComponent<Mask>().enabled = false;
-            }
-            if (CascadeToALLChildren)
-            {
-                for (int c = 0; c < transform.childCount; c++)
-                {
-                    SetSAM(transform.GetChild(c));
-                }
+                transform.parent.GetComponent<Mask>().enabled = false;
+                return;
             }
 
-            MaterialNotSupported = mat == null;
-        }
-        
-        void SetSAM(Transform t)
-        {
-            SoftMaskScript thisSam = t.gameObject.GetComponent<SoftMaskScript>();
-            if (thisSam == null)
+            var graphic = GetComponent<Graphic>();
+            if (graphic != null)
             {
-                thisSam = t.gameObject.AddComponent<SoftMaskScript>();
-
+                mat = new Material(Shader.Find("UI Extensions/SoftMaskShader"));
+                graphic.material = mat;
+                cachedCanvas = graphic.canvas;
             }
-            thisSam.MaskArea = MaskArea;
-            thisSam.AlphaMask = AlphaMask;
-            thisSam.CutOff = CutOff;
-            thisSam.HardBlend = HardBlend;
-            thisSam.FlipAlphaMask = FlipAlphaMask;
-            thisSam.maskScalingRect = maskScalingRect;
-            thisSam.DontClipMaskScalingRect = DontClipMaskScalingRect;
-            thisSam.CascadeToALLChildren = CascadeToALLChildren;
+
         }
 
-        void GetCanvas()
+        Transform GetParentTranform(Transform t)
         {
-            Transform t = transform;
-
-            int lvlLimit = 100;
-            int lvl = 0;
-
-            while (canvas == null && lvl < lvlLimit)
-            {
-                canvas = t.gameObject.GetComponent<Canvas>();
-                if (canvas == null)
-                {
-                    t = t.parent;
-                }
-
-                lvl++;
-            }
+            return t.parent;
         }
 
         void Update()
         {
-            SetMask();
+            if (cachedCanvas != null)
+            {
+                SetMask();
+            }
         }
 
         void SetMask()
         {
-            if (MaterialNotSupported)
-            {
-                return;
-            }
+            var maskRectXform = MaskArea;
+            var worldRect = RectTransformUtility.PixelAdjustRect(MaskArea, cachedCanvas);
 
-            // Get the two rectangle areas
-            maskRect = MaskArea.rect;
-            contentRect = myRect.rect;
+            var size = worldRect.size;
+            maskScale.Set(1.0f / size.x, 1.0f / size.y);
+            maskOffset = -worldRect.min;
+            maskOffset.Scale(maskScale);
 
-            if (isText) // Need to do our calculations in world for Text
-            {
-                maskScalingRect = null;
-                if (canvas.renderMode == RenderMode.ScreenSpaceOverlay && Application.isPlaying)
-                {
-                    p = canvas.transform.InverseTransformPoint(MaskArea.transform.position);
-                    siz = new Vector2(maskRect.width, maskRect.height);
-                }
-                else
-                {
-                    worldCorners = new Vector3[4];
-                    MaskArea.GetWorldCorners(worldCorners);
-                    siz = (worldCorners[2] - worldCorners[0]);
-                    p = MaskArea.transform.position;
-                }
-
-                min = p - (new Vector2(siz.x, siz.y) * .5f);
-                max = p + (new Vector2(siz.x, siz.y) * .5f);
-            }
-            else // Need to do our calculations in tex space for Image.
-            {
-                if (maskScalingRect != null)
-                {
-                    maskRect = maskScalingRect.rect;
-                }
-
-                // Get the centre offset
-                if (maskScalingRect != null)
-                {
-                     centre = myRect.transform.InverseTransformPoint(maskScalingRect.transform.TransformPoint(maskScalingRect.rect.center));
-                }
-                else
-                {
-                    centre = myRect.transform.InverseTransformPoint(MaskArea.transform.TransformPoint(MaskArea.rect.center));
-                }
-                centre += (Vector2)myRect.transform.InverseTransformPoint(myRect.transform.position) - myRect.rect.center;
-
-                // Set the scale for mapping texcoords mask
-                AlphaUV = new Vector2(maskRect.width / contentRect.width, maskRect.height / contentRect.height);
-
-                // set my min and max to the centre offest
-                min = centre;
-                max = min;
-
-                siz = new Vector2(maskRect.width, maskRect.height) * .5f;
-                // Move them out to the min max extreams
-                min -= siz;
-                max += siz;
-
-                // Now move these into texture space. 0 - 1
-                min = new Vector2(min.x / contentRect.width, min.y / contentRect.height) + tp;
-                max = new Vector2(max.x / contentRect.width, max.y / contentRect.height) + tp;
-            }
-
-            mat.SetFloat("_HardBlend", HardBlend ? 1 : 0);
-
-            // Pass the values to the shader
-            mat.SetVector("_Min", min);
-            mat.SetVector("_Max", max);
-
-            mat.SetInt("_FlipAlphaMask", FlipAlphaMask ? 1 : 0);
+            mat.SetTextureOffset("_AlphaMask", maskOffset);
+            mat.SetTextureScale("_AlphaMask", maskScale);
             mat.SetTexture("_AlphaMask", AlphaMask);
 
-            mat.SetInt("_NoOuterClip", DontClipMaskScalingRect && maskScalingRect != null ? 1 : 0);
-
-            if (!isText) // No mod needed for Text
-            {
-                mat.SetVector("_AlphaUV", AlphaUV);
-            }
-
+            mat.SetFloat("_HardBlend", HardBlend ? 1 : 0);
+            mat.SetInt("_FlipAlphaMask", FlipAlphaMask ? 1 : 0);
+            mat.SetInt("_NoOuterClip", DontClipMaskScalingRect ? 1 : 0);
             mat.SetFloat("_CutOff", CutOff);
         }
     }
diff --git a/Shaders/SoftMaskShader.shader b/Shaders/SoftMaskShader.shader
index a409fde..0accab5 100644
--- a/Shaders/SoftMaskShader.shader
+++ b/Shaders/SoftMaskShader.shader
@@ -12,11 +12,7 @@
 		_StencilReadMask("Stencil Read Mask", Float) = 255
 
 		_ColorMask("Color Mask", Float) = 15
-
-		_Min("Min",Vector) = (0,0,0,0)
-		_Max("Max",Vector) = (1,1,0,0)
 		_AlphaMask("AlphaMask - Must be Wrapped",2D) = "white"{}
-		_AlphaUV("AlphaUV",Vector) = (0,0,0,0)
 		_CutOff("CutOff",Float) = 0
 		[MaterialToggle]
 		_HardBlend("HardBlend",Float) = 0
@@ -73,26 +69,30 @@
 				float4 vertex   : SV_POSITION;
 				fixed4 color : COLOR;
 				half2 texcoord  : TEXCOORD0;
-				float4 worldPosition : TEXCOORD1;
+				float2 maskTexcoord : TEXCOORD1;
 			};
 
+			inline float UnityGet2DClipping (in float2 position, in float4 clipRect)
+			{
+				float2 inside = step(clipRect.xy, position.xy) * step(position.xy, clipRect.zw);
+				return inside.x * inside.y;
+			}
+
 			fixed4 _Color;
 			fixed4 _TextureSampleAdd;
+			sampler2D _MainTex;
 
 			bool _UseAlphaClip;
-
-			float4 _ProgressColor;
-			float _Value;
-			int _LeftToRight;
-
 			int _FlipAlphaMask = 0;
+			float4 _AlphaMask_ST;
+			sampler2D _AlphaMask;
 
 			v2f vert(appdata_t IN)
 			{
 				v2f OUT;
-				OUT.worldPosition = IN.vertex;
-				OUT.vertex = mul(UNITY_MATRIX_MVP, OUT.worldPosition);
-
+				float4 wolrdPos = IN.vertex;
+				OUT.maskTexcoord = TRANSFORM_TEX(wolrdPos.xy, _AlphaMask);
+				OUT.vertex = mul(UNITY_MATRIX_MVP, IN.vertex);
 				OUT.texcoord = IN.texcoord;
 
 				#ifdef UNITY_HALF_TEXEL_OFFSET
@@ -103,29 +103,26 @@
 				return OUT;
 			}
 
-			sampler2D _MainTex;
-			sampler2D _AlphaMask;
-
-			float2 _AlphaUV;
-
-			float2 _Min;
-			float2 _Max;
-
 			float _CutOff;
-
 			bool _HardBlend = false;
 			bool _NoOuterClip = false;
 
 			fixed4 frag(v2f IN) : SV_Target
 			{
 				half4 color = (tex2D(_MainTex, IN.texcoord) + _TextureSampleAdd) * IN.color;
+				float4 inMask = float4( 
+					step(float2(0.0f, 0.0f), IN.maskTexcoord), 
+					step(IN.maskTexcoord, float2(1.0f, 1.0f)) );
 
 				// Do we want to clip the image to the Mask Rectangle?
-				if (!_NoOuterClip && (IN.texcoord.x < _Min.x || IN.texcoord.x > _Max.x || IN.texcoord.y < _Min.y || IN.texcoord.y > _Max.y)) // Yes we do
+				if (_NoOuterClip == false && all(inMask) == false )
+				{
 					color.a = 0;
+				}
 				else // It's in the mask rectangle, so apply the alpha of the mask provided.
 				{
-					float a = tex2D(_AlphaMask, (IN.texcoord - _Min) / _AlphaUV).a;
+
+					float a = tex2D(_AlphaMask, IN.maskTexcoord).a;
 
 					if (a <= _CutOff)
 						a = 0;
@@ -138,13 +135,11 @@
 					if (_FlipAlphaMask == 1)
 						a = 1 - a;
 
-					if(!(IN.texcoord.x < _Min.x || IN.texcoord.x > _Max.x || IN.texcoord.y < _Min.y || IN.texcoord.y > _Max.y))
-						color.a *= a;
+					color.a *= a;
 				}
 
 				if (_UseAlphaClip)
 					clip(color.a - 0.001);
-
 				return color;
 			}
 			ENDCG
diff --git a/Shaders/SoftMaskShaderText.shader b/Shaders/SoftMaskShaderText.shader
index 5c71bf8..b02a527 100644
--- a/Shaders/SoftMaskShaderText.shader
+++ b/Shaders/SoftMaskShaderText.shader
@@ -1,6 +1,4 @@
-// Upgrade NOTE: replaced '_Object2World' with 'unity_ObjectToWorld'
-
-Shader "UI Extensions/SoftMaskShaderText"
+Shader "UI Extensions/SoftMaskShaderText"
 {
 	Properties
 	{
@@ -14,144 +12,12 @@ Shader "UI Extensions/SoftMaskShaderText"
 		_StencilReadMask("Stencil Read Mask", Float) = 255
 
 		_ColorMask("Color Mask", Float) = 15
-
-		_Min("Min",Vector) = (0,0,0,0)
-		_Max("Max",Vector) = (1,1,0,0)
 		_AlphaMask("AlphaMask - Must be Wrapped",2D) = "white"{}
 		_CutOff("CutOff",Float) = 0
 		[MaterialToggle]
 		_HardBlend("HardBlend",Float) = 0
 		_FlipAlphaMask("Flip Alpha Mask",int) = 0
+		_NoOuterClip("Outer Clip",int) = 0
 	}
-
-	SubShader
-	{
-		Tags
-		{
-			"Queue" = "Transparent"
-			"IgnoreProjector" = "True"
-			"RenderType" = "Transparent"
-			"PreviewType" = "Plane"
-			"CanUseSpriteAtlas" = "True"
-		}
-
-		Stencil
-		{
-			Ref[_Stencil]
-			Comp[_StencilComp]
-			Pass[_StencilOp]
-			ReadMask[_StencilReadMask]
-			WriteMask[_StencilWriteMask]
-		}
-
-		Cull Off
-		Lighting Off
-		ZWrite Off
-		ZTest[unity_GUIZTestMode]
-		Blend SrcAlpha OneMinusSrcAlpha
-		ColorMask[_ColorMask]
-
-		Pass
-		{
-			CGPROGRAM
-// Upgrade NOTE: excluded shader from DX11 and Xbox360; has structs without semantics (struct v2f members _ProgressColor,_Value,_Min,_Max,_Mul,_CutOff)
-#pragma exclude_renderers d3d11 xbox360
-			#pragma vertex vert
-			#pragma fragment frag
-
-			#include "UnityCG.cginc"
-
-			struct appdata_t
-			{
-				float4 vertex   : POSITION;
-				float4 color    : COLOR;
-				float2 texcoord : TEXCOORD0;
-			};
-
-			struct v2f
-			{
-				float4 vertex   : SV_POSITION;
-				fixed4 color : COLOR;
-				half2 texcoord  : TEXCOORD0;
-				float4 worldPosition : TEXCOORD1;
-				float4 worldPosition2 : COLOR1;
-
-			fixed4 _Color;
-			fixed4 _TextureSampleAdd;
-
-			bool _UseAlphaClip;
-
-			float4 _ProgressColor;
-			float _Value;
-			int _LeftToRight;
-
-			int _HardBlend = false;
-
-			int _FlipAlphaMask = 0;
-
-			sampler2D _MainTex;
-			sampler2D _AlphaMask;
-
-			float2 _Min;
-			float2 _Max;
-
-			float2 _Mul;
-
-			float _CutOff;
-			int _NoOuterClip;
-			v2f vert(appdata_t IN)
-			{
-				v2f OUT;
-				OUT.worldPosition = IN.vertex;
-				OUT.vertex = mul(UNITY_MATRIX_MVP, OUT.worldPosition);
-				OUT.worldPosition2 = mul(unity_ObjectToWorld, IN.vertex);
-
-				OUT.texcoord = IN.texcoord;
-
-				#ifdef UNITY_HALF_TEXEL_OFFSET
-					OUT.vertex.xy += (_ScreenParams.zw - 1.0)*float2(-1,1);
-					OUT.worldPosition2 += (_ScreenParams.zw - 1.0)*float2(-1, 1);
-				#endif
-
-				OUT.color = IN.color * _Color;
-				return OUT;
-			}
-
-
-
-			fixed4 frag(v2f IN) : SV_Target
-			{
-				half4 color = (tex2D(_MainTex, IN.texcoord) + _TextureSampleAdd);
-
-				
-				// Do we want to clip the image to the Mask Rectangle?
-				if (IN.worldPosition2.x <= _Min.x || IN.worldPosition2.x >= _Max.x || IN.worldPosition2.y <= _Min.y || IN.worldPosition2.y >= _Max.y)
-					color.a = 0;
-				else // It's in the mask rectangle, so apply the alpha of the mask provided.
-				{
-					float a = tex2D(_AlphaMask, (IN.worldPosition2.xy - _Max) / (_Max-_Min)).a;
-
-					if (a <= _CutOff)
-						a = 0;
-					else
-					{
-						if (_HardBlend)
-							a = 1;
-					}
-
-					if (_FlipAlphaMask == 1)
-						a = 1 - a;
-
-					if(!(IN.worldPosition2.x <= _Min.x || IN.worldPosition2.x >= _Max.x || IN.worldPosition2.y <= _Min.y || IN.worldPosition2.y >= _Max.y))
-						color *= a;					
-				}
-
-				if (_UseAlphaClip)
-					clip(color.a - 0.001);
-
-				return color;
-			}
-			ENDCG
-		}
-	}
+	FallBack "UI Extensions/SoftMaskShader"
 }
\ No newline at end of file