1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
// 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, CurrentPrecisionType, WirePortDataType.FLOAT3, initialColorVarName, initalColorValue );
string dotVarName = "desaturateDot" + OutputId;
string dotVarValue = string.Format( GenericDesaturateOp0, initialColorVarName );
dataCollector.AddLocalVariable( UniqueId, CurrentPrecisionType, WirePortDataType.FLOAT, dotVarName, dotVarValue );
RegisterLocalVariable( 0, string.Format( GenericDesaturateOp1, initialColorVarName, dotVarName,fraction ), ref dataCollector, "desaturateVar" + OutputId );
return m_outputPorts[ 0 ].LocalValue( dataCollector.PortCategory );
}
}
}
|
