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98 lines
3.2 KiB
98 lines
3.2 KiB
// Amplify Shader Editor - Visual Shader Editing Tool
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// Copyright (c) Amplify Creations, Lda <info@amplify.pt>
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//https://www.shadertoy.com/view/ldX3D4
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using UnityEngine;
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using UnityEditor;
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using System;
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namespace AmplifyShaderEditor
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{
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[Serializable]
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[NodeAttributes( "Posterize", "Image Effects", "Converts a continuous gradation of tones to multiple regions of fewer tones" )]
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public sealed class PosterizeNode : ParentNode
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{
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private const string PosterizationPowerStr = "Power";
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[SerializeField]
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private int m_posterizationPower = 1;
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protected override void CommonInit( int uniqueId )
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{
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base.CommonInit( uniqueId );
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AddInputPort( WirePortDataType.COLOR, false, "RGBA", -1, MasterNodePortCategory.Fragment, 1 );
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AddInputPort( WirePortDataType.INT, false, "Power", -1, MasterNodePortCategory.Fragment, 0 );
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m_inputPorts[ 1 ].AutoDrawInternalData = true;
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AddOutputPort( WirePortDataType.COLOR, Constants.EmptyPortValue );
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m_textLabelWidth = 60;
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m_autoWrapProperties = true;
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m_previewShaderGUID = "ecb3048ef0eec1645bad1d72a98d8279";
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}
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public override void DrawProperties()
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{
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base.DrawProperties();
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if( !m_inputPorts[ 1 ].IsConnected )
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{
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EditorGUILayout.BeginVertical();
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{
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EditorGUI.BeginChangeCheck();
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m_posterizationPower = EditorGUILayoutIntSlider( PosterizationPowerStr, m_posterizationPower, 1, 256 );
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if( EditorGUI.EndChangeCheck() )
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{
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GetInputPortByUniqueId( 0 ).IntInternalData = m_posterizationPower;
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}
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}
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EditorGUILayout.EndVertical();
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}
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else
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{
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EditorGUILayout.Space();
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}
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}
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public override string GenerateShaderForOutput( int outputId, ref MasterNodeDataCollector dataCollector, bool ignoreLocalVar )
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{
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if( m_outputPorts[ 0 ].IsLocalValue( dataCollector.PortCategory ) )
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return m_outputPorts[ 0 ].LocalValue( dataCollector.PortCategory );
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string posterizationPower = "1";
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if( m_inputPorts[ 1 ].IsConnected )
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{
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posterizationPower = m_inputPorts[ 1 ].GeneratePortInstructions( ref dataCollector );
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}
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else
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{
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posterizationPower = m_posterizationPower.ToString();
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}
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string colorTarget = m_inputPorts[ 0 ].GeneratePortInstructions( ref dataCollector );
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string divVar = "div" + OutputId;
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dataCollector.AddLocalVariable( UniqueId, "float " + divVar + "=256.0/float(" + posterizationPower + ");" );
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string result = "( floor( " + colorTarget + " * " + divVar + " ) / " + divVar + " )";
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RegisterLocalVariable( 0, result, ref dataCollector, "posterize" + OutputId );
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return m_outputPorts[ 0 ].LocalValue( dataCollector.PortCategory );
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}
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public override void RefreshExternalReferences()
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{
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base.RefreshExternalReferences();
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m_inputPorts[ 0 ].ChangeType( WirePortDataType.COLOR, false );
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m_inputPorts[ 1 ].ChangeType( WirePortDataType.INT, false );
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}
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public override void WriteToString( ref string nodeInfo, ref string connectionsInfo )
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{
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base.WriteToString( ref nodeInfo, ref connectionsInfo );
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IOUtils.AddFieldValueToString( ref nodeInfo, m_posterizationPower );
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}
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public override void ReadFromString( ref string[] nodeParams )
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{
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base.ReadFromString( ref nodeParams );
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m_posterizationPower = Convert.ToInt32( GetCurrentParam( ref nodeParams ) );
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}
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}
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}
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