Editor stuff

Assets/Plugins/com.unity.uiextensions/Runtime/Resources/Shaders/UIImageCrop.shader

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+// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'
+
+/// Credit 00christian00
+/// Sourced from - http://forum.unity3d.com/threads/any-way-to-show-part-of-an-image-without-using-mask.360085/#post-2332030
+
+Shader "UI Extensions/UI Image Crop" {
+	Properties
+	{
+		_MainTex ("Base (RGB)", 2D) = "white" {}
+
+		_XCrop ("X Crop", Range(0.0,1.0)) = 1
+		_YCrop ("Y Crop", Range(0.0,1.0)) = 1
+	}
+	
+	SubShader {
+
+	ZWrite Off
+	Tags
+		{
+			"Queue" = "Transparent"
+			"RenderType" = "Transparent"
+			"IgnoreProjector" = "True"
+		}
+		Blend SrcAlpha OneMinusSrcAlpha 
+	
+    Pass {
+
+      CGPROGRAM
+	 
+      #pragma vertex vert
+      #pragma fragment frag
+      #include "UnityCG.cginc"
+    
+      struct v2f {
+          float4 pos : POSITION;
+          fixed4 color : COLOR;
+		  float2 uv 	: TEXCOORD0; //UV1 coord
+      };
+      
+	  uniform sampler2D _MainTex;
+	  float4 _MainTex_ST;
+	  uniform float _XCrop;
+	  uniform float _YCrop;
+	  
+      v2f vert (v2f v)
+      {
+	  
+          v2f o;
+		  o.color=v.color;
+		  o.color.a=0.1;
+		  o.pos = UnityObjectToClipPos (v.pos);
+		  
+		  o.uv=TRANSFORM_TEX(v.uv, _MainTex); 
+		 
+          return o;
+      }
+      fixed4 frag (v2f i) : COLOR
+	  { 
+	  
+	  //return fixed4(0.25,0,0,1);
+	  i.color.a=step(i.uv.x,_XCrop);
+	  //I don't like the bottom up ordering,so I reverse it
+	  i.color.a=i.color.a*step(1-i.uv.y,_YCrop);
+	  return i.color * tex2D (_MainTex, i.uv);
+	   }
+      ENDCG
+    }
+  } 
+}