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// 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 ) );
}
}
}
}
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