Added White Balance support

Author: joshbernfeld

examples/Mac/FilterShowcase/FilterShowcase/FilterOperations.swift

@@ -76,16 +76,16 @@ let filterOperations: Array<FilterOperationInterface> = [
         },
         filterOperationType:.singleInput
     ),
-//    FilterOperation(
-//        filter:{WhiteBalance()},
-//        listName:"White balance",
-//        titleName:"White Balance",
-//        sliderConfiguration:.enabled(minimumValue:2500.0, maximumValue:7500.0, initialValue:5000.0),
-//        sliderUpdateCallback: {(filter, sliderValue) in
-//            filter.temperature = sliderValue
-//        },
-//        filterOperationType:.singleInput
-//    ),
+    FilterOperation(
+        filter:{WhiteBalance()},
+        listName:"White balance",
+        titleName:"White Balance",
+        sliderConfiguration:.enabled(minimumValue:2500.0, maximumValue:7500.0, initialValue:5000.0),
+        sliderUpdateCallback: {(filter, sliderValue) in
+            filter.temperature = sliderValue
+        },
+        filterOperationType:.singleInput
+    ),
     FilterOperation(
         filter:{MonochromeFilter()},
         listName:"Monochrome",

framework/GPUImage.xcodeproj/project.pbxproj

@@ -7,6 +7,10 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		1F1A90B424BEC03D0029813E /* WhiteBalance.swift in Sources */ = {isa = PBXBuildFile; fileRef = 79A81C992101015700A3B43A /* WhiteBalance.swift */; };
+		1F1A90B524BEC03D0029813E /* WhiteBalance.metal in Sources */ = {isa = PBXBuildFile; fileRef = 79A81C9C2101016100A3B43A /* WhiteBalance.metal */; };
+		1F1A90B624BEC03D0029813E /* WhiteBalance.swift in Sources */ = {isa = PBXBuildFile; fileRef = 79A81C992101015700A3B43A /* WhiteBalance.swift */; };
+		1F1A90B724BEC03D0029813E /* WhiteBalance.metal in Sources */ = {isa = PBXBuildFile; fileRef = 79A81C9C2101016100A3B43A /* WhiteBalance.metal */; };
 		4C280F76213426D6001A985C /* Posterize.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4C280F75213426D6001A985C /* Posterize.swift */; };
 		4C280F77213426D6001A985C /* Posterize.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4C280F75213426D6001A985C /* Posterize.swift */; };
 		4C280F79213426EC001A985C /* Posterize.metal in Sources */ = {isa = PBXBuildFile; fileRef = 4C280F78213426EC001A985C /* Posterize.metal */; };
@@ -1110,6 +1114,7 @@
 				795ECAA521ED2549000EF927 /* ThresholdSobelEdgeDetection.metal in Sources */,
 				7954BF462214965D008402A6 /* PinchDistortion.swift in Sources */,
 				795ECAB121ED2E58000EF927 /* ThresholdSketch.metal in Sources */,
+				1F1A90B424BEC03D0029813E /* WhiteBalance.swift in Sources */,
 				79DD50CD213454A2004EF308 /* Vignette.metal in Sources */,
 				BC9294AA210513DF006C8E93 /* SepiaToneFilter.swift in Sources */,
 				79DD50C4213450BE004EF308 /* SwirlDistortion.swift in Sources */,
@@ -1174,6 +1179,7 @@
 				793D934120F693AD008A7A6E /* GammaAdjustment.swift in Sources */,
 				BCCFEA6222AEEDDB00C9F4CC /* Camera.swift in Sources */,
 				79A81CA62101266600A3B43A /* HighlightAndShadowTint.swift in Sources */,
+				1F1A90B524BEC03D0029813E /* WhiteBalance.metal in Sources */,
 				79CB6E38210A0EDE0042F87B /* SourceOverBlend.metal in Sources */,
 				79CB6DD22108B3F00042F87B /* ColorDodgeBlend.swift in Sources */,
 				79EB1B6E2125C7670049135E /* LookupFilter.metal in Sources */,
@@ -1315,6 +1321,7 @@
 				795ECAA621ED2549000EF927 /* ThresholdSobelEdgeDetection.metal in Sources */,
 				795ECAB221ED2E58000EF927 /* ThresholdSketch.metal in Sources */,
 				7954BF472214965D008402A6 /* PinchDistortion.swift in Sources */,
+				1F1A90B624BEC03D0029813E /* WhiteBalance.swift in Sources */,
 				79DD50CE213454A2004EF308 /* Vignette.metal in Sources */,
 				BC9294AB210513DF006C8E93 /* SepiaToneFilter.swift in Sources */,
 				79DD50C5213450BE004EF308 /* SwirlDistortion.swift in Sources */,
@@ -1379,6 +1386,7 @@
 				793D933620F68C1B008A7A6E /* ContrastAdjustment.swift in Sources */,
 				BCCFEA6322AEEDDB00C9F4CC /* Camera.swift in Sources */,
 				79E30E6D20F118CD005FA13C /* Texture.swift in Sources */,
+				1F1A90B724BEC03D0029813E /* WhiteBalance.metal in Sources */,
 				79A81CA72101266600A3B43A /* HighlightAndShadowTint.swift in Sources */,
 				BC7BA29420F6F2CB006B5F4B /* BrightnessAdjustment.metal in Sources */,
 				79CB6E39210A0EDE0042F87B /* SourceOverBlend.metal in Sources */,

framework/Source/Operations/WhiteBalance.metal

@@ -3,9 +3,8 @@
 using namespace metal;
 
 constant half3 warmFilter = half3(0.93, 0.54, 0.0);
-
-constant half3x3 RGBtoYIQ = half3x3(0.299, 0.587, 0.114, 0.596, -0.274, -0.322, 0.212, -0.523, 0.311);
-constant half3x3 YIQtoRGB = half3x3(1.0, 0.956, 0.621, 1.0, -0.272, -0.647, 1.0, -1.105, 1.702);
+constant half3x3 RGBtoYIQ = half3x3(half3(0.299, 0.587, 0.114), half3(0.596, -0.274, -0.322), half3(0.212, -0.523, 0.311));
+constant half3x3 YIQtoRGB = half3x3(half3(1.0, 0.956, 0.621), half3(1.0, -0.272, -0.647), half3(1.0, -1.105, 1.702));
 
 typedef struct
 {

framework/Source/Operations/WhiteBalance.swift

@@ -1,13 +1,11 @@
-/*
 public class WhiteBalance: BasicOperation {
     public var temperature:Float = 5000.0 { didSet { uniformSettings["temperature"] = temperature < 5000.0 ? 0.0004 * (temperature - 5000.0) : 0.00006 * (temperature - 5000.0) } }
     public var tint:Float = 0.0 { didSet { uniformSettings["tint"] = tint / 100.0 } }
 
     public init() {
         super.init(fragmentFunctionName:"whiteBalanceFragmentShader", numberOfInputs:1)
 
-        uniformSettings.appendUniform(5000.0)
-        uniformSettings.appendUniform(0.0)
+        ({temperature = 5000.0})()
+        ({tint = 0.0})()
     }
 }
- */