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// Amplify Shader Editor - Visual Shader Editing Tool
// Copyright (c) Amplify Creations, Lda <info@amplify.pt>
using UnityEngine;
using UnityEditor;
using System;
namespace AmplifyShaderEditor
{
[Serializable]
[NodeAttributes( "Gamma To Linear", "Image Effects", "Converts color from gamma space to linear space" )]
public sealed class GammaToLinearNode : HelperParentNode
{
public readonly static string[] ModeListStr = { "Fast sRGB to Linear", "Exact sRGB to Linear" };
public readonly static int[] ModeListInt = { 0, 1 };
public readonly static string[] ModeListStrLW = { "Fast sRGB to Linear", "Exact sRGB to Linear", "Gamma 2.0 to Linear", "Gamma 2.2 to Linear" };
public readonly static int[] ModeListIntLW = { 0, 1, 2, 3 };
[SerializeField]
public int m_selectedMode = 0;
protected override void CommonInit( int uniqueId )
{
base.CommonInit( uniqueId );
m_funcType = "GammaToLinearSpace";
m_inputPorts[ 0 ].ChangeType( WirePortDataType.FLOAT3, false );
m_inputPorts[ 0 ].Name = "RGB";
m_outputPorts[ 0 ].ChangeType( WirePortDataType.FLOAT3, false );
m_autoWrapProperties = true;
m_previewShaderGUID = "e82a888a6ebdb1443823aafceaa051b9";
m_textLabelWidth = 120;
}
protected override void OnUniqueIDAssigned()
{
base.OnUniqueIDAssigned();
m_localVarName = "gammaToLinear" + OutputId;
}
public override void DrawProperties()
{
base.DrawProperties();
if( ContainerGraph.IsSRP )
{
m_selectedMode = EditorGUILayoutIntPopup( "Mode", m_selectedMode, ModeListStrLW, ModeListIntLW );
EditorGUILayout.HelpBox( "Fast sRGB: fast approximation from sRGB to Linear\n\nExact sRGB: a more expensive but exact calculation from sRGB to Linear.\n\nGamma 2.0: crude approximation from Gamma to Linear using a power of 2.0 gamma value\n\nGamma 2.2: an approximation from Gamma to Linear using a power of 2.2 gamma value", MessageType.None );
}
else
{
m_selectedMode = EditorGUILayoutIntPopup( "Mode", m_selectedMode, ModeListStr, ModeListInt );
EditorGUILayout.HelpBox( "Fast sRGB: fast approximation from sRGB to Linear\n\nExact sRGB: a more expensive but exact calculation from sRGB to Linear.", MessageType.None );
}
}
public override string GenerateShaderForOutput( int outputId, ref MasterNodeDataCollector dataCollector, bool ignoreLocalvar )
{
string result = m_inputPorts[ 0 ].GeneratePortInstructions( ref dataCollector );
if( !dataCollector.IsSRP )
{
m_selectedMode = Mathf.Min( m_selectedMode, 1 );
if( m_selectedMode == 1 )
{
dataCollector.AddLocalVariable( UniqueId, "half3 " + m_localVarName + " = " + result + ";" );
dataCollector.AddLocalVariable( UniqueId, m_localVarName + " = half3( GammaToLinearSpaceExact(" + m_localVarName + ".r), GammaToLinearSpaceExact(" + m_localVarName + ".g), GammaToLinearSpaceExact(" + m_localVarName + ".b) );" );
return m_localVarName;
}
return base.GenerateShaderForOutput( outputId, ref dataCollector, ignoreLocalvar );
}
else
{
dataCollector.AddToIncludes( UniqueId, TemplateHelperFunctions.CoreCommonLib );
dataCollector.AddToIncludes( UniqueId, TemplateHelperFunctions.CoreColorLib );
switch( m_selectedMode )
{
default:
case 0:
m_funcLWFormatOverride = "FastSRGBToLinear( {0} )";
m_funcHDFormatOverride = "FastSRGBToLinear( {0} )";
break;
case 1:
m_funcLWFormatOverride = "SRGBToLinear( {0} )";
m_funcHDFormatOverride = "SRGBToLinear( {0} )";
break;
case 2:
m_funcLWFormatOverride = "Gamma20ToLinear( {0} )";
m_funcHDFormatOverride = "Gamma20ToLinear( {0} )";
break;
case 3:
m_funcLWFormatOverride = "Gamma22ToLinear( {0} )";
m_funcHDFormatOverride = "Gamma22ToLinear( {0} )";
break;
}
return base.GenerateShaderForOutput( outputId, ref dataCollector, ignoreLocalvar );
}
}
public override void WriteToString( ref string nodeInfo, ref string connectionsInfo )
{
base.WriteToString( ref nodeInfo, ref connectionsInfo );
IOUtils.AddFieldValueToString( ref nodeInfo, m_selectedMode );
}
public override void ReadFromString( ref string[] nodeParams )
{
base.ReadFromString( ref nodeParams );
if( UIUtils.CurrentShaderVersion() > 11003 && UIUtils.CurrentShaderVersion() <= 14503 )
{
bool fast = Convert.ToBoolean( GetCurrentParam( ref nodeParams ) );
if( fast )
m_selectedMode = 1;
}
if( UIUtils.CurrentShaderVersion() > 14503 )
{
m_selectedMode = Convert.ToInt32( GetCurrentParam( ref nodeParams ) );
}
}
}
}
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