1 files changed, 55 insertions, 0 deletions
diff --git a/Assets/ThirdParty/AmplifyShaderEditor/Plugins/Editor/Nodes/ImageEffects/SimpleContrastOpNode.cs b/Assets/ThirdParty/AmplifyShaderEditor/Plugins/Editor/Nodes/ImageEffects/SimpleContrastOpNode.cs
new file mode 100644
index 00000000..01310922
--- /dev/null
+++ b/Assets/ThirdParty/AmplifyShaderEditor/Plugins/Editor/Nodes/ImageEffects/SimpleContrastOpNode.cs
@@ -0,0 +1,55 @@
+// Amplify Shader Editor - Visual Shader Editing Tool
+// Copyright (c) Amplify Creations, Lda <info@amplify.pt>
+using System;
+
+namespace AmplifyShaderEditor
+{
+	[Serializable]
+	[NodeAttributes( "Simple Contrast", "Image Effects", "Simple contrast matrix multiplication" )]
+	public sealed class SimpleContrastOpNode : ParentNode
+	{
+		private const string InputTypeStr = "Contrast";
+		private const string FunctionHeader = "CalculateContrast({0},{1})";
+		private readonly string[] m_functionBody = { "float4 CalculateContrast( float contrastValue, float4 colorTarget )\n",
+											"{\n",
+											"\tfloat t = 0.5 * ( 1.0 - contrastValue );\n",
+											"\treturn mul( float4x4( contrastValue,0,0,t, 0,contrastValue,0,t, 0,0,contrastValue,t, 0,0,0,1 ), colorTarget );\n",
+											"}"};
+		protected override void CommonInit( int uniqueId )
+		{
+			base.CommonInit( uniqueId );
+			AddPorts();
+			m_textLabelWidth = 70;
+			m_useInternalPortData = true;
+			m_previewShaderGUID = "8d76799413f9f0547ac9b1de7ba798f1";
+		}
+
+		void AddPorts()
+		{
+			AddInputPort( WirePortDataType.COLOR, false, "RGBA", -1, MasterNodePortCategory.Fragment, 1 );
+			AddInputPort( WirePortDataType.FLOAT, false, "Value", -1, MasterNodePortCategory.Fragment, 0 );
+			AddOutputPort( WirePortDataType.COLOR, Constants.EmptyPortValue );
+		}
+
+		public override string GenerateShaderForOutput( int outputId, ref MasterNodeDataCollector dataCollector, bool ignoreLocalVar )
+		{
+			if( m_outputPorts[ 0 ].IsLocalValue( dataCollector.PortCategory ) )
+				return m_outputPorts[ 0 ].LocalValue( dataCollector.PortCategory );
+
+			string contrastValue = m_inputPorts[ 1 ].GeneratePortInstructions( ref dataCollector );
+			string colorTarget = m_inputPorts[ 0 ].GeneratePortInstructions( ref dataCollector );
+			string result = dataCollector.AddFunctions( FunctionHeader, m_functionBody, false, contrastValue, colorTarget );
+
+			return CreateOutputLocalVariable( 0, result, ref dataCollector );
+		}
+
+		public override void ReadFromString( ref string[] nodeParams )
+		{
+			base.ReadFromString( ref nodeParams );
+			if( UIUtils.CurrentShaderVersion() < 5004 )
+			{
+				m_inputPorts[ 1 ].FloatInternalData = Convert.ToSingle( GetCurrentParam( ref nodeParams ) );
+			}
+		}
+	}
+}