You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
57 lines
2.4 KiB
57 lines
2.4 KiB
// Amplify Shader Editor - Visual Shader Editing Tool
|
|
// Copyright (c) Amplify Creations, Lda <info@amplify.pt>
|
|
|
|
// http://stackoverflow.com/questions/9320953/what-algorithm-does-photoshop-use-to-desaturate-an-image
|
|
// https://www.shadertoy.com/view/lsdXDH
|
|
|
|
namespace AmplifyShaderEditor
|
|
{
|
|
[System.Serializable]
|
|
[NodeAttributes( "Desaturate", "Image Effects", "Generic desaturation operation" )]
|
|
public sealed class DesaturateOpNode : ParentNode
|
|
{
|
|
private const string GenericDesaturateOp0 = "dot( {0}, float3( 0.299, 0.587, 0.114 ))";
|
|
private const string GenericDesaturateOp1 = "lerp( {0}, {1}.xxx, {2} )";
|
|
//private const string GenericDesaturateOp = "lerp( {0},dot({0},float3(0.299,0.587,0.114)).xxx,{1})";
|
|
|
|
protected override void CommonInit( int uniqueId )
|
|
{
|
|
base.CommonInit( uniqueId );
|
|
AddInputPort( WirePortDataType.FLOAT3, false, "RGB" );
|
|
AddInputPort( WirePortDataType.FLOAT, false, "Fraction" );
|
|
AddOutputPort( WirePortDataType.FLOAT3, Constants.EmptyPortValue );
|
|
m_useInternalPortData = true;
|
|
m_previewShaderGUID = "faabe9efdf44b9648a523f1742abdfd3";
|
|
}
|
|
|
|
void UpdatePorts( int portId )
|
|
{
|
|
if ( portId == 0 )
|
|
{
|
|
m_inputPorts[ 0 ].MatchPortToConnection();
|
|
m_outputPorts[ 0 ].ChangeType( m_inputPorts[ 0 ].DataType, false );
|
|
}
|
|
}
|
|
|
|
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 initalColorValue = m_inputPorts[ 0 ].GeneratePortInstructions( ref dataCollector );
|
|
string fraction = m_inputPorts[ 1 ].GeneratePortInstructions( ref dataCollector );
|
|
|
|
string initialColorVarName = "desaturateInitialColor" + OutputId;
|
|
dataCollector.AddLocalVariable( UniqueId, m_currentPrecisionType, WirePortDataType.FLOAT3, initialColorVarName, initalColorValue );
|
|
|
|
string dotVarName = "desaturateDot" + OutputId;
|
|
string dotVarValue = string.Format( GenericDesaturateOp0, initialColorVarName );
|
|
|
|
dataCollector.AddLocalVariable( UniqueId, m_currentPrecisionType,WirePortDataType.FLOAT, dotVarName, dotVarValue );
|
|
RegisterLocalVariable( 0, string.Format( GenericDesaturateOp1, initialColorVarName, dotVarName,fraction ), ref dataCollector, "desaturateVar" + OutputId );
|
|
|
|
return m_outputPorts[ 0 ].LocalValue( dataCollector.PortCategory );
|
|
}
|
|
}
|
|
}
|