feat: FeComposite filter (#2433)

# Summary

<img width="324" alt="image"
src="https://github.com/user-attachments/assets/0a9b4a56-d093-49f7-aacd-c198ee00f256">

## Test Plan

Examples app -> Filters -> FeComposite

## Compatibility

| OS      | Implemented |
| ------- | :---------: |
| iOS     |    ✅      |
| macOS   |    ❌*      |
| Android |    ✅      |
| Web     |    ✅      |

_*_ macOS isn't working as:
* `CGBitmapContextCreateImage` always returns null
* FeFlood isn't aligned properly (will be fixed in the following PR)

RNSVG.podspec

@@ -12,14 +12,19 @@ Pod::Spec.new do |s|
   s.homepage          = package['homepage']
   s.authors           = 'Horcrux Chen'
   s.source            = { :git => 'https://github.com/react-native-community/react-native-svg.git', :tag => "v#{s.version}" }
-  s.source_files    = 'apple/**/*.{h,m,mm}'
+  s.source_files      = 'apple/**/*.{h,m,mm,metal}'
   s.ios.exclude_files = '**/*.macos.{h,m,mm}'
   s.tvos.exclude_files = '**/*.macos.{h,m,mm}'
   s.visionos.exclude_files = '**/*.macos.{h,m,mm}' if s.respond_to?(:visionos)
   s.osx.exclude_files = '**/*.ios.{h,m,mm}'
-  s.requires_arc    = true
+  s.requires_arc      = true
   s.platforms         = { :osx => "10.14", :ios => "12.4", :tvos => "12.4", :visionos => "1.0" }
   
+  s.osx.resource_bundles  = {'RNSVGFilters' => ['apple/**/*.macosx.metallib']}
+  s.ios.resource_bundles  = {'RNSVGFilters' => ['apple/**/*.iphoneos.metallib']}
+  s.tvos.resource_bundles  = {'RNSVGFilters' => ['apple/**/*.appletvos.metallib']}
+  s.visionos.resource_bundles  = {'RNSVGFilters' => ['apple/**/*.xros.metallib']}
+
   if fabric_enabled
     install_modules_dependencies(s)
 

android/src/main/java/com/horcrux/svg/FeCompositeView.java

@@ -0,0 +1,132 @@
+package com.horcrux.svg;
+
+import android.annotation.SuppressLint;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.PorterDuff;
+import android.graphics.PorterDuffXfermode;
+import com.facebook.react.bridge.ReactContext;
+import java.util.HashMap;
+
+@SuppressLint("ViewConstructor")
+class FeCompositeView extends FilterPrimitiveView {
+  String mIn1;
+  String mIn2;
+  float mK1;
+  float mK2;
+  float mK3;
+  float mK4;
+  FilterProperties.FeCompositeOperator mOperator;
+
+  public FeCompositeView(ReactContext reactContext) {
+    super(reactContext);
+  }
+
+  public void setIn1(String in1) {
+    this.mIn1 = in1;
+    invalidate();
+  }
+
+  public void setIn2(String in2) {
+    this.mIn2 = in2;
+    invalidate();
+  }
+
+  public void setK1(Float value) {
+    this.mK1 = value;
+    invalidate();
+  }
+
+  public void setK2(Float value) {
+    this.mK2 = value;
+    invalidate();
+  }
+
+  public void setK3(Float value) {
+    this.mK3 = value;
+    invalidate();
+  }
+
+  public void setK4(Float value) {
+    this.mK4 = value;
+    invalidate();
+  }
+
+  public void setOperator(String operator) {
+    this.mOperator = FilterProperties.FeCompositeOperator.getEnum(operator);
+    invalidate();
+  }
+
+  @Override
+  public Bitmap applyFilter(HashMap<String, Bitmap> resultsMap, Bitmap prevResult) {
+    Bitmap in1 = getSource(resultsMap, prevResult, this.mIn1);
+    Bitmap in2 = getSource(resultsMap, prevResult, this.mIn2);
+    Bitmap result = Bitmap.createBitmap(in1.getWidth(), in1.getHeight(), Bitmap.Config.ARGB_8888);
+    Canvas canvas = new Canvas(result);
+    Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
+    canvas.drawBitmap(in1, 0, 0, paint);
+
+    switch (this.mOperator) {
+      case OVER -> {
+        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OVER));
+      }
+      case IN -> {
+        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN));
+      }
+      case OUT -> {
+        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT));
+      }
+      case ATOP -> {
+        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_ATOP));
+      }
+      case XOR -> {
+        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.XOR));
+      }
+      case ARITHMETIC -> {
+        // result = k1*i1*i2 + k2*i1 + k3*i2 + k4
+        int nPixels = result.getWidth() * result.getHeight();
+        int[] pixels1 = new int[nPixels];
+        int[] pixels2 = new int[nPixels];
+        result.getPixels(
+            pixels1, 0, result.getWidth(), 0, 0, result.getWidth(), result.getHeight());
+
+        for (int i = 0; i < nPixels; i++) {
+          int color1 = pixels1[i];
+          int color2 = pixels2[i];
+
+          int r1 = (color1 >> 16) & 0xFF;
+          int g1 = (color1 >> 8) & 0xFF;
+          int b1 = color1 & 0xFF;
+          int a1 = (color1 >>> 24);
+          int r2 = (color2 >> 16) & 0xFF;
+          int g2 = (color2 >> 8) & 0xFF;
+          int b2 = color2 & 0xFF;
+          int a2 = (color2 >>> 24);
+
+          int rResult = (int) (mK1 * r1 * r2 + mK2 * r1 + mK3 * r2 + mK4);
+          int gResult = (int) (mK1 * g1 * g2 + mK2 * g1 + mK3 * g2 + mK4);
+          int bResult = (int) (mK1 * b1 * b2 + mK2 * b1 + mK3 * b2 + mK4);
+          int aResult = (int) (mK1 * a1 * a2 + mK2 * a1 + mK3 * a2 + mK4);
+
+          rResult = Math.min(255, Math.max(0, rResult));
+          gResult = Math.min(255, Math.max(0, gResult));
+          bResult = Math.min(255, Math.max(0, bResult));
+          aResult = Math.min(255, Math.max(0, aResult));
+
+          int pixel = (aResult << 24) | (rResult << 16) | (gResult << 8) | bResult;
+          pixels1[i] = pixel;
+        }
+
+        result.setPixels(
+            pixels1, 0, result.getWidth(), 0, 0, result.getWidth(), result.getHeight());
+      }
+    }
+
+    if (this.mOperator != FilterProperties.FeCompositeOperator.ARITHMETIC) {
+      canvas.drawBitmap(in2, 0, 0, paint);
+    }
+
+    return result;
+  }
+}

android/src/main/java/com/horcrux/svg/FilterProperties.java

@@ -144,4 +144,41 @@ class FilterProperties {
       return type;
     }
   }
+
+  enum FeCompositeOperator {
+    OVER("over"),
+    IN("in"),
+    OUT("out"),
+    ATOP("atop"),
+    XOR("xor"),
+    ARITHMETIC("arithmetic"),
+    ;
+
+    private final String type;
+
+    FeCompositeOperator(String type) {
+      this.type = type;
+    }
+
+    static FeCompositeOperator getEnum(String strVal) {
+      if (!typeToEnum.containsKey(strVal)) {
+        throw new IllegalArgumentException("Unknown String Value: " + strVal);
+      }
+      return typeToEnum.get(strVal);
+    }
+
+    private static final Map<String, FeCompositeOperator> typeToEnum = new HashMap<>();
+
+    static {
+      for (final FeCompositeOperator en : FeCompositeOperator.values()) {
+        typeToEnum.put(en.type, en);
+      }
+    }
+
+    @Nonnull
+    @Override
+    public String toString() {
+      return type;
+    }
+  }
 }

android/src/main/java/com/horcrux/svg/RenderableViewManager.java

@@ -107,6 +107,8 @@ import com.facebook.react.viewmanagers.RNSVGFeBlendManagerDelegate;
 import com.facebook.react.viewmanagers.RNSVGFeBlendManagerInterface;
 import com.facebook.react.viewmanagers.RNSVGFeColorMatrixManagerDelegate;
 import com.facebook.react.viewmanagers.RNSVGFeColorMatrixManagerInterface;
+import com.facebook.react.viewmanagers.RNSVGFeCompositeManagerDelegate;
+import com.facebook.react.viewmanagers.RNSVGFeCompositeManagerInterface;
 import com.facebook.react.viewmanagers.RNSVGFeFloodManagerDelegate;
 import com.facebook.react.viewmanagers.RNSVGFeFloodManagerInterface;
 import com.facebook.react.viewmanagers.RNSVGFeGaussianBlurManagerDelegate;
@@ -595,6 +597,7 @@ class VirtualViewManager<V extends VirtualView> extends ViewGroupManager<Virtual
     RNSVGFilter,
     RNSVGFeBlend,
     RNSVGFeColorMatrix,
+    RNSVGFeComposite,
     RNSVGFeFlood,
     RNSVGFeGaussianBlur,
     RNSVGFeMerge,
@@ -649,6 +652,8 @@ class VirtualViewManager<V extends VirtualView> extends ViewGroupManager<Virtual
         return new FeBlendView(reactContext);
       case RNSVGFeColorMatrix:
         return new FeColorMatrixView(reactContext);
+      case RNSVGFeComposite:
+        return new FeCompositeView(reactContext);
       case RNSVGFeFlood:
         return new FeFloodView(reactContext);
       case RNSVGFeGaussianBlur:
@@ -1640,6 +1645,51 @@ class RenderableViewManager<T extends RenderableView> extends VirtualViewManager
     }
   }
 
+  static class FeCompositeManager extends FilterPrimitiveManager<FeCompositeView>
+      implements RNSVGFeCompositeManagerInterface<FeCompositeView> {
+    FeCompositeManager() {
+      super(SVGClass.RNSVGFeComposite);
+      mDelegate = new RNSVGFeCompositeManagerDelegate(this);
+    }
+
+    public static final String REACT_CLASS = "RNSVGFeComposite";
+
+    @ReactProp(name = "in1")
+    public void setIn1(FeCompositeView node, String in1) {
+      node.setIn1(in1);
+    }
+
+    @ReactProp(name = "in2")
+    public void setIn2(FeCompositeView node, String in2) {
+      node.setIn2(in2);
+    }
+
+    @ReactProp(name = "operator1")
+    public void setOperator1(FeCompositeView node, String operator) {
+      node.setOperator(operator);
+    }
+
+    @ReactProp(name = "k1")
+    public void setK1(FeCompositeView node, float value) {
+      node.setK1(value);
+    }
+
+    @ReactProp(name = "k2")
+    public void setK2(FeCompositeView node, float value) {
+      node.setK2(value);
+    }
+
+    @ReactProp(name = "k3")
+    public void setK3(FeCompositeView node, float value) {
+      node.setK3(value);
+    }
+
+    @ReactProp(name = "k4")
+    public void setK4(FeCompositeView node, float value) {
+      node.setK4(value);
+    }
+  }
+
   static class FeFloodManager extends FilterPrimitiveManager<FeFloodView>
       implements RNSVGFeFloodManagerInterface<FeFloodView> {
     FeFloodManager() {

android/src/main/java/com/horcrux/svg/SvgPackage.java

@@ -232,6 +232,15 @@ public class SvgPackage extends TurboReactPackage implements ViewManagerOnDemand
                   return new FeColorMatrixManager();
                 }
               }));
+      specs.put(
+          FeCompositeManager.REACT_CLASS,
+          ModuleSpec.viewManagerSpec(
+              new Provider<NativeModule>() {
+                @Override
+                public NativeModule get() {
+                  return new FeCompositeManager();
+                }
+              }));
       specs.put(
           FeFloodManager.REACT_CLASS,
           ModuleSpec.viewManagerSpec(

android/src/paper/java/com/facebook/react/viewmanagers/RNSVGFeCompositeManagerDelegate.java

@@ -0,0 +1,65 @@
+/**
+* This code was generated by [react-native-codegen](https://www.npmjs.com/package/react-native-codegen).
+*
+* Do not edit this file as changes may cause incorrect behavior and will be lost
+* once the code is regenerated.
+*
+* @generated by codegen project: GeneratePropsJavaDelegate.js
+*/
+
+package com.facebook.react.viewmanagers;
+
+import android.view.View;
+import androidx.annotation.Nullable;
+import com.facebook.react.bridge.DynamicFromObject;
+import com.facebook.react.uimanager.BaseViewManagerDelegate;
+import com.facebook.react.uimanager.BaseViewManagerInterface;
+
+public class RNSVGFeCompositeManagerDelegate<T extends View, U extends BaseViewManagerInterface<T> & RNSVGFeCompositeManagerInterface<T>> extends BaseViewManagerDelegate<T, U> {
+  public RNSVGFeCompositeManagerDelegate(U viewManager) {
+    super(viewManager);
+  }
+  @Override
+  public void setProperty(T view, String propName, @Nullable Object value) {
+    switch (propName) {
+      case "x":
+        mViewManager.setX(view, new DynamicFromObject(value));
+        break;
+      case "y":
+        mViewManager.setY(view, new DynamicFromObject(value));
+        break;
+      case "width":
+        mViewManager.setWidth(view, new DynamicFromObject(value));
+        break;
+      case "height":
+        mViewManager.setHeight(view, new DynamicFromObject(value));
+        break;
+      case "result":
+        mViewManager.setResult(view, value == null ? null : (String) value);
+        break;
+      case "in1":
+        mViewManager.setIn1(view, value == null ? null : (String) value);
+        break;
+      case "in2":
+        mViewManager.setIn2(view, value == null ? null : (String) value);
+        break;
+      case "operator1":
+        mViewManager.setOperator1(view, (String) value);
+        break;
+      case "k1":
+        mViewManager.setK1(view, value == null ? 0f : ((Double) value).floatValue());
+        break;
+      case "k2":
+        mViewManager.setK2(view, value == null ? 0f : ((Double) value).floatValue());
+        break;
+      case "k3":
+        mViewManager.setK3(view, value == null ? 0f : ((Double) value).floatValue());
+        break;
+      case "k4":
+        mViewManager.setK4(view, value == null ? 0f : ((Double) value).floatValue());
+        break;
+      default:
+        super.setProperty(view, propName, value);
+    }
+  }
+}

android/src/paper/java/com/facebook/react/viewmanagers/RNSVGFeCompositeManagerInterface.java

@@ -0,0 +1,29 @@
+/**
+* This code was generated by [react-native-codegen](https://www.npmjs.com/package/react-native-codegen).
+*
+* Do not edit this file as changes may cause incorrect behavior and will be lost
+* once the code is regenerated.
+*
+* @generated by codegen project: GeneratePropsJavaInterface.js
+*/
+
+package com.facebook.react.viewmanagers;
+
+import android.view.View;
+import androidx.annotation.Nullable;
+import com.facebook.react.bridge.Dynamic;
+
+public interface RNSVGFeCompositeManagerInterface<T extends View> {
+  void setX(T view, Dynamic value);
+  void setY(T view, Dynamic value);
+  void setWidth(T view, Dynamic value);
+  void setHeight(T view, Dynamic value);
+  void setResult(T view, @Nullable String value);
+  void setIn1(T view, @Nullable String value);
+  void setIn2(T view, @Nullable String value);
+  void setOperator1(T view, @Nullable String value);
+  void setK1(T view, float value);
+  void setK2(T view, float value);
+  void setK3(T view, float value);
+  void setK4(T view, float value);
+}

apple/Filters/MetalCI/RNSVGArithmeticFilter.h

@@ -0,0 +1,11 @@
+#import "RNSVGCustomFilter.h"
+
+@interface RNSVGArithmeticFilter : RNSVGCustomFilter {
+  CIImage *inputImage2;
+  NSNumber *inputK1;
+  NSNumber *inputK2;
+  NSNumber *inputK3;
+  NSNumber *inputK4;
+}
+
+@end

apple/Filters/MetalCI/RNSVGArithmeticFilter.metal

@@ -0,0 +1,16 @@
+#include <metal_stdlib>
+using namespace metal;
+#include <CoreImage/CoreImage.h>
+
+
+extern "C" float4 RNSVGArithmeticFilter(coreimage::sample_t in1, coreimage::sample_t in2, float k1, float k2, float k3, float k4)
+{
+    float4 arithmeticResult;
+    arithmeticResult.rgb = k1 * in1.rgb * in2.rgb + k2 * in1.rgb + k3 * in2.rgb + k4;
+    arithmeticResult.a = k1 * in1.a * in2.a + k2 * in1.a + k3 * in2.a + k4;
+
+    arithmeticResult.rgb = clamp(arithmeticResult.rgb, 0.0, 1.0);
+    arithmeticResult.a = clamp(arithmeticResult.a, 0.0, 1.0);
+
+    return arithmeticResult;
+}

apple/Filters/MetalCI/RNSVGArithmeticFilter.mm

@@ -0,0 +1,66 @@
+#import "RNSVGArithmeticFilter.h"
+
+static CIColorKernel *arithmeticFilter = nil;
+
+@implementation RNSVGArithmeticFilter
+
+- (id)init
+{
+  if (arithmeticFilter == nil) {
+    arithmeticFilter = [super getWithName:@"RNSVGArithmeticFilter"];
+  }
+  return [super init];
+}
+
+- (NSDictionary *)customAttributes
+{
+  return @{
+    @"inputImage1" : @{
+      kCIAttributeIdentity : @0,
+      kCIAttributeClass : @"CIImage",
+      kCIAttributeDisplayName : @"in1",
+      kCIAttributeType : kCIAttributeTypeImage
+    },
+    @"inputImage2" : @{
+      kCIAttributeIdentity : @0,
+      kCIAttributeClass : @"CIImage",
+      kCIAttributeDisplayName : @"in2",
+      kCIAttributeType : kCIAttributeTypeImage
+    },
+    @"inputK1" : @{
+      kCIAttributeIdentity : @0,
+      kCIAttributeClass : @"NSNumber",
+      kCIAttributeDisplayName : @"k1",
+      kCIAttributeType : kCIAttributeTypeScalar
+    },
+    @"inputK2" : @{
+      kCIAttributeIdentity : @0,
+      kCIAttributeClass : @"NSNumber",
+      kCIAttributeDisplayName : @"k2",
+      kCIAttributeType : kCIAttributeTypeScalar
+    },
+    @"inputK3" : @{
+      kCIAttributeIdentity : @0,
+      kCIAttributeClass : @"NSNumber",
+      kCIAttributeDisplayName : @"k3",
+      kCIAttributeType : kCIAttributeTypeScalar
+    },
+    @"inputK4" : @{
+      kCIAttributeIdentity : @0,
+      kCIAttributeClass : @"NSNumber",
+      kCIAttributeDisplayName : @"k4",
+      kCIAttributeType : kCIAttributeTypeScalar
+    },
+  };
+}
+
+- (CIImage *)outputImage
+{
+  CISampler *in1 = [CISampler samplerWithImage:inputImage1];
+  CISampler *in2 = [CISampler samplerWithImage:inputImage2];
+
+  return [arithmeticFilter applyWithExtent:inputImage1.extent
+                                 arguments:@[ in1, in2, inputK1, inputK2, inputK3, inputK4 ]];
+}
+
+@end

apple/Filters/MetalCI/RNSVGCompositeXor.h

@@ -0,0 +1,7 @@
+#import "RNSVGCustomFilter.h"
+
+@interface RNSVGCompositeXor : RNSVGCustomFilter {
+  CIImage *inputImage2;
+}
+
+@end

apple/Filters/MetalCI/RNSVGCompositeXor.metal

@@ -0,0 +1,13 @@
+#include <metal_stdlib>
+using namespace metal;
+#include <CoreImage/CoreImage.h>
+
+extern "C" float4 RNSVGCompositeXor(coreimage::sample_t in1, coreimage::sample_t in2)
+{
+    float4 result;
+    
+    result.rgb = in1.rgb * (1.0 - in2.a) + in2.rgb * (1.0 - in1.a);
+    result.a = in1.a + in2.a - 2.0 * in1.a * in2.a;
+    
+    return result;
+}

apple/Filters/MetalCI/RNSVGCompositeXor.mm

@@ -0,0 +1,41 @@
+#import "RNSVGCompositeXor.h"
+
+static CIColorKernel *compositeXor = nil;
+
+@implementation RNSVGCompositeXor
+
+- (id)init
+{
+  if (compositeXor == nil) {
+    compositeXor = [super getWithName:@"RNSVGCompositeXor"];
+  }
+  return [super init];
+}
+
+- (NSDictionary *)customAttributes
+{
+  return @{
+    @"inputImage1" : @{
+      kCIAttributeIdentity : @0,
+      kCIAttributeClass : @"CIImage",
+      kCIAttributeDisplayName : @"in1",
+      kCIAttributeType : kCIAttributeTypeImage
+    },
+    @"inputImage2" : @{
+      kCIAttributeIdentity : @0,
+      kCIAttributeClass : @"CIImage",
+      kCIAttributeDisplayName : @"in2",
+      kCIAttributeType : kCIAttributeTypeImage
+    },
+  };
+}
+
+- (CIImage *)outputImage
+{
+  CISampler *in1 = [CISampler samplerWithImage:inputImage1];
+  CISampler *in2 = [CISampler samplerWithImage:inputImage2];
+
+  return [compositeXor applyWithExtent:inputImage1.extent arguments:@[ in1, in2 ]];
+}
+
+@end

apple/Filters/MetalCI/RNSVGCustomFilter.h

@@ -0,0 +1,9 @@
+#import <CoreImage/CoreImage.h>
+
+@interface RNSVGCustomFilter : CIFilter {
+  CIImage *inputImage1;
+}
+
+- (CIColorKernel *)getWithName:(NSString *)name;
+
+@end

apple/Filters/MetalCI/RNSVGCustomFilter.mm

@@ -0,0 +1,35 @@
+#import "RNSVGCustomFilter.h"
+
+#if TARGET_OS_OSX
+#define extension @"macosx.metallib"
+#elif TARGET_OS_IOS
+#define extension @"iphoneos.metallib"
+#elif TARGET_OS_TV
+#define extension @"tvos.metallib"
+#elif TARGET_OS_VISION
+#define extension @"xros.metallib"
+#endif
+
+@implementation RNSVGCustomFilter
+
+- (CIColorKernel *)getWithName:(NSString *)name
+{
+  NSBundle *frameworkBundle = [NSBundle bundleForClass:[self class]];
+  NSURL *bundleUrl = [frameworkBundle.resourceURL URLByAppendingPathComponent:@"RNSVGFilters.bundle"];
+  NSBundle *bundle = [NSBundle bundleWithURL:bundleUrl];
+  NSURL *url = [bundle URLForResource:name withExtension:extension];
+
+  if (url != nil) {
+    NSError *error = nil;
+    NSData *data = [NSData dataWithContentsOfURL:url options:0 error:&error];
+
+    @try {
+      return [CIColorKernel kernelWithFunctionName:name fromMetalLibraryData:data error:&error];
+    } @catch (NSException *exception) {
+      NSLog(@"RNSVG CustomFilter exception: %@", exception);
+    }
+  }
+  return nil;
+}
+
+@end

apple/Filters/RNSVGCompositeOperator.h

@@ -0,0 +1,9 @@
+typedef CF_ENUM(int32_t, RNSVGCompositeOperator) {
+  SVG_FECOMPOSITE_OPERATOR_UNKNOWN,
+  SVG_FECOMPOSITE_OPERATOR_OVER,
+  SVG_FECOMPOSITE_OPERATOR_IN,
+  SVG_FECOMPOSITE_OPERATOR_OUT,
+  SVG_FECOMPOSITE_OPERATOR_ATOP,
+  SVG_FECOMPOSITE_OPERATOR_XOR,
+  SVG_FECOMPOSITE_OPERATOR_ARITHMETIC
+};

apple/Filters/RNSVGFeComposite.h

@@ -0,0 +1,16 @@
+#import "RNSVGArithmeticFilter.h"
+#import "RNSVGCompositeOperator.h"
+#import "RNSVGCompositeXor.h"
+#import "RNSVGFilterPrimitive.h"
+
+@interface RNSVGFeComposite : RNSVGFilterPrimitive
+
+@property (nonatomic, strong) NSString *in1;
+@property (nonatomic, strong) NSString *in2;
+@property (nonatomic, assign) RNSVGCompositeOperator operator1;
+@property (nonatomic, strong) NSNumber *k1;
+@property (nonatomic, strong) NSNumber *k2;
+@property (nonatomic, strong) NSNumber *k3;
+@property (nonatomic, strong) NSNumber *k4;
+
+@end

apple/Filters/RNSVGFeComposite.mm

@@ -0,0 +1,201 @@
+#import "RNSVGFeComposite.h"
+#import "RNSVGArithmeticFilter.h"
+#import "RNSVGCompositeXor.h"
+
+#ifdef RCT_NEW_ARCH_ENABLED
+#import <React/RCTConversions.h>
+#import <React/RCTFabricComponentsPlugins.h>
+#import <react/renderer/components/rnsvg/ComponentDescriptors.h>
+#import <react/renderer/components/view/conversions.h>
+#import "RNSVGConvert.h"
+#import "RNSVGFabricConversions.h"
+#endif // RCT_NEW_ARCH_ENABLED
+
+static CIColorKernel *thresholdKernel;
+
+@implementation RNSVGFeComposite
+
+#ifdef RCT_NEW_ARCH_ENABLED
+using namespace facebook::react;
+
+// Needed because of this: https://github.com/facebook/react-native/pull/37274
++ (void)load
+{
+  [super load];
+}
+
+- (instancetype)initWithFrame:(CGRect)frame
+{
+  if (self = [super initWithFrame:frame]) {
+    static const auto defaultProps = std::make_shared<const RNSVGFeCompositeProps>();
+    _props = defaultProps;
+  }
+  return self;
+}
+
+#pragma mark - RCTComponentViewProtocol
+
++ (ComponentDescriptorProvider)componentDescriptorProvider
+{
+  return concreteComponentDescriptorProvider<RNSVGFeCompositeComponentDescriptor>();
+}
+
+- (void)updateProps:(Props::Shared const &)props oldProps:(Props::Shared const &)oldProps
+{
+  const auto &newProps = static_cast<const RNSVGFeCompositeProps &>(*props);
+
+  self.in1 = RCTNSStringFromStringNilIfEmpty(newProps.in1);
+  self.in2 = RCTNSStringFromStringNilIfEmpty(newProps.in2);
+  self.k1 = [NSNumber numberWithFloat:newProps.k1];
+  self.k2 = [NSNumber numberWithFloat:newProps.k2];
+  self.k3 = [NSNumber numberWithFloat:newProps.k3];
+  self.k4 = [NSNumber numberWithFloat:newProps.k4];
+  self.operator1 = [RNSVGConvert RNSVGRNSVGCompositeOperatorFromCppEquivalent:newProps.operator1];
+
+  setCommonFilterProps(newProps, self);
+  _props = std::static_pointer_cast<RNSVGFeCompositeProps const>(props);
+}
+
+- (void)prepareForRecycle
+{
+  [super prepareForRecycle];
+  _in1 = nil;
+  _in2 = nil;
+  _k1 = nil;
+  _k2 = nil;
+  _k3 = nil;
+  _k4 = nil;
+  _operator1 = RNSVGCompositeOperator::SVG_FECOMPOSITE_OPERATOR_UNKNOWN;
+}
+#endif // RCT_NEW_ARCH_ENABLED
+
+- (void)setIn1:(NSString *)in1
+{
+  if ([in1 isEqualToString:_in1]) {
+    return;
+  }
+
+  _in1 = in1;
+  [self invalidate];
+}
+
+- (void)setIn2:(NSString *)in2
+{
+  if ([in2 isEqualToString:_in2]) {
+    return;
+  }
+
+  _in2 = in2;
+  [self invalidate];
+}
+
+- (void)setK1:(NSNumber *)k1
+{
+  if (k1 == _k1) {
+    return;
+  }
+
+  _k1 = k1;
+  [self invalidate];
+}
+
+- (void)setK2:(NSNumber *)k2
+{
+  if (k2 == _k2) {
+    return;
+  }
+
+  _k2 = k2;
+  [self invalidate];
+}
+
+- (void)setK3:(NSNumber *)k3
+{
+  if (k3 == _k3) {
+    return;
+  }
+
+  _k3 = k3;
+  [self invalidate];
+}
+
+- (void)setK4:(NSNumber *)k4
+{
+  if (k4 == _k4) {
+    return;
+  }
+
+  _k4 = k4;
+  [self invalidate];
+}
+
+- (void)setOperator1:(RNSVGCompositeOperator)operator1
+{
+  if (operator1 == _operator1) {
+    return;
+  }
+
+  _operator1 = operator1;
+  [self invalidate];
+}
+
+- (CIImage *)applyFilter:(NSMutableDictionary<NSString *, CIImage *> *)results previousFilterResult:(CIImage *)previous
+{
+  CIImage *inResults1 = self.in1 ? [results objectForKey:self.in1] : nil;
+  CIImage *inResults2 = self.in2 ? [results objectForKey:self.in2] : nil;
+  CIImage *inputImage1 = inResults1 ? inResults1 : previous;
+  CIImage *inputImage2 = inResults2 ? inResults2 : previous;
+
+  CIFilter *filter = nil;
+
+  switch (self.operator1) {
+    case SVG_FECOMPOSITE_OPERATOR_OVER:
+      filter = [CIFilter filterWithName:@"CISourceOverCompositing"];
+      break;
+    case SVG_FECOMPOSITE_OPERATOR_IN:
+      filter = [CIFilter filterWithName:@"CISourceInCompositing"];
+      break;
+    case SVG_FECOMPOSITE_OPERATOR_OUT:
+      filter = [CIFilter filterWithName:@"CISourceOutCompositing"];
+      break;
+    case SVG_FECOMPOSITE_OPERATOR_ATOP:
+      filter = [CIFilter filterWithName:@"CISourceAtopCompositing"];
+      break;
+    case SVG_FECOMPOSITE_OPERATOR_XOR:
+      filter = [[RNSVGCompositeXor alloc] init];
+      break;
+    case SVG_FECOMPOSITE_OPERATOR_ARITHMETIC:
+      filter = [[RNSVGArithmeticFilter alloc] init];
+      break;
+    default:
+      return nil;
+  }
+
+  [filter setDefaults];
+
+  if (self.operator1 == SVG_FECOMPOSITE_OPERATOR_XOR) {
+    [filter setValue:inputImage1 forKey:@"inputImage1"];
+    [filter setValue:inputImage2 forKey:@"inputImage2"];
+  } else if (self.operator1 == SVG_FECOMPOSITE_OPERATOR_ARITHMETIC) {
+    [filter setValue:inputImage1 forKey:@"inputImage1"];
+    [filter setValue:inputImage2 forKey:@"inputImage2"];
+    [filter setValue:(self.k1 != nil ? self.k1 : 0) forKey:@"inputK1"];
+    [filter setValue:(self.k2 != nil ? self.k2 : 0) forKey:@"inputK2"];
+    [filter setValue:(self.k3 != nil ? self.k3 : 0) forKey:@"inputK3"];
+    [filter setValue:(self.k4 != nil ? self.k4 : 0) forKey:@"inputK4"];
+  } else {
+    [filter setValue:inputImage1 forKey:@"inputImage"];
+    [filter setValue:inputImage2 forKey:@"inputBackgroundImage"];
+  }
+
+  return [filter valueForKey:@"outputImage"];
+}
+
+#ifdef RCT_NEW_ARCH_ENABLED
+Class<RCTComponentViewProtocol> RNSVGFeCompositeCls(void)
+{
+  return RNSVGFeComposite.class;
+}
+#endif // RCT_NEW_ARCH_ENABLED
+
+@end

apple/Utils/RCTConvert+RNSVG.h

@@ -13,6 +13,7 @@
 #import "RNSVGBlendMode.h"
 #import "RNSVGCGFCRule.h"
 #import "RNSVGColorMatrixType.h"
+#import "RNSVGCompositeOperator.h"
 #import "RNSVGEdgeMode.h"
 #import "RNSVGLength.h"
 #import "RNSVGMaskType.h"

apple/Utils/RCTConvert+RNSVG.mm

@@ -85,6 +85,19 @@ RCT_ENUM_CONVERTER(
     SVG_FEBLEND_MODE_UNKNOWN,
     intValue)
 
+RCT_ENUM_CONVERTER(
+    RNSVGCompositeOperator,
+    (@{
+      @"over" : @(SVG_FECOMPOSITE_OPERATOR_OVER),
+      @"in" : @(SVG_FECOMPOSITE_OPERATOR_IN),
+      @"out" : @(SVG_FECOMPOSITE_OPERATOR_OUT),
+      @"atop" : @(SVG_FECOMPOSITE_OPERATOR_ATOP),
+      @"xor" : @(SVG_FECOMPOSITE_OPERATOR_XOR),
+      @"arithmetic" : @(SVG_FECOMPOSITE_OPERATOR_ARITHMETIC),
+    }),
+    SVG_FECOMPOSITE_OPERATOR_UNKNOWN,
+    intValue)
+
 + (RNSVGBrush *)RNSVGBrush:(id)json
 {
   if ([json isKindOfClass:[NSNumber class]]) {

apple/Utils/RNSVGConvert.h

@@ -2,6 +2,7 @@
 #import <react/renderer/components/rnsvg/Props.h>
 #import "RNSVGBlendMode.h"
 #import "RNSVGColorMatrixType.h"
+#import "RNSVGCompositeOperator.h"
 #import "RNSVGEdgeMode.h"
 #import "RNSVGUnits.h"
 
@@ -13,6 +14,7 @@ namespace react = facebook::react;
 + (RNSVGUnits)RNSVGUnitsFromPrimitiveUnitsCppEquivalent:(react::RNSVGFilterPrimitiveUnits)svgUnits;
 + (RNSVGBlendMode)RNSVGBlendModeFromCppEquivalent:(react::RNSVGFeBlendMode)mode;
 + (RNSVGColorMatrixType)RNSVGColorMatrixTypeFromCppEquivalent:(react::RNSVGFeColorMatrixType)type;
++ (RNSVGCompositeOperator)RNSVGRNSVGCompositeOperatorFromCppEquivalent:(react::RNSVGFeCompositeOperator1)operator1;
 + (RNSVGEdgeMode)RNSVGEdgeModeFromCppEquivalent:(react::RNSVGFeGaussianBlurEdgeMode)edgeMode;
 
 @end

apple/Utils/RNSVGConvert.mm

@@ -55,6 +55,24 @@
   }
 }
 
++ (RNSVGCompositeOperator)RNSVGRNSVGCompositeOperatorFromCppEquivalent:(react::RNSVGFeCompositeOperator1)operator1
+{
+  switch (operator1) {
+    case react::RNSVGFeCompositeOperator1::Over:
+      return SVG_FECOMPOSITE_OPERATOR_OVER;
+    case react::RNSVGFeCompositeOperator1::In:
+      return SVG_FECOMPOSITE_OPERATOR_IN;
+    case react::RNSVGFeCompositeOperator1::Out:
+      return SVG_FECOMPOSITE_OPERATOR_OUT;
+    case react::RNSVGFeCompositeOperator1::Atop:
+      return SVG_FECOMPOSITE_OPERATOR_ATOP;
+    case react::RNSVGFeCompositeOperator1::Xor:
+      return SVG_FECOMPOSITE_OPERATOR_XOR;
+    case react::RNSVGFeCompositeOperator1::Arithmetic:
+      return SVG_FECOMPOSITE_OPERATOR_ARITHMETIC;
+  }
+}
+
 + (RNSVGEdgeMode)RNSVGEdgeModeFromCppEquivalent:(react::RNSVGFeGaussianBlurEdgeMode)edgeMode
 {
   switch (edgeMode) {

apple/ViewManagers/RNSVGFeCompositeManager.h

@@ -0,0 +1,5 @@
+#import "RNSVGFilterPrimitiveManager.h"
+
+@interface RNSVGFeCompositeManager : RNSVGFilterPrimitiveManager
+
+@end

apple/ViewManagers/RNSVGFeCompositeManager.mm

@@ -0,0 +1,22 @@
+#import "RNSVGFeCompositeManager.h"
+#import "RNSVGCompositeOperator.h"
+#import "RNSVGFeComposite.h"
+
+@implementation RNSVGFeCompositeManager
+
+RCT_EXPORT_MODULE()
+
+- (RNSVGFeComposite *)node
+{
+  return [RNSVGFeComposite new];
+}
+
+RCT_EXPORT_VIEW_PROPERTY(in1, NSString)
+RCT_EXPORT_VIEW_PROPERTY(in2, NSString)
+RCT_EXPORT_VIEW_PROPERTY(operator1, RNSVGCompositeOperator)
+RCT_EXPORT_VIEW_PROPERTY(k1, NSNumber *)
+RCT_EXPORT_VIEW_PROPERTY(k2, NSNumber *)
+RCT_EXPORT_VIEW_PROPERTY(k3, NSNumber *)
+RCT_EXPORT_VIEW_PROPERTY(k4, NSNumber *)
+
+@end

apps/examples/src/examples/Filters/FeComposite.tsx

@@ -0,0 +1,424 @@
+import {Image, Text as RNText, View} from 'react-native';
+import {
+  Defs,
+  FeComposite,
+  FeFlood,
+  FeMerge,
+  FeMergeNode,
+  Filter,
+  G,
+  Path,
+  Rect,
+  Svg,
+  Text,
+  Use,
+} from 'react-native-svg';
+
+import React from 'react';
+
+QuickTestExample.title = 'Quick Test Example';
+function QuickTestExample() {
+  return (
+    <Svg width="200" height="150">
+      <Filter id="offset" width="180" height="180">
+        <FeComposite in="SourceGraphic" in2="BackgroundImage" operator="in" />
+      </Filter>
+      <Rect x="50" y="50" width="100" height="100" fill="red" />
+      <Rect
+        x="0"
+        y="0"
+        width="100"
+        height="100"
+        fill="blue"
+        filter="url(#offset)"
+      />
+    </Svg>
+  );
+}
+
+ReferenceExample.title = 'FeComposite W3 reference';
+function ReferenceExample() {
+  return (
+    <View style={{backgroundColor: '#fff'}}>
+      <Svg width="330" height="195" viewBox="0 0 1100 650">
+        <Defs>
+          <Filter
+            id="overFlood"
+            filterUnits="objectBoundingBox"
+            x="-5%"
+            y="-5%"
+            width="110%"
+            height="110%">
+            <FeFlood floodColor="#ffffff" floodOpacity="1" result="flood" />
+            <FeComposite
+              in="SourceGraphic"
+              in2="BackgroundImage"
+              operator="over"
+              result="comp"
+            />
+            <FeMerge>
+              <FeMergeNode in="flood" />
+              <FeMergeNode in="comp" />
+            </FeMerge>
+          </Filter>
+          <Filter
+            id="inFlood"
+            filterUnits="objectBoundingBox"
+            x="-5%"
+            y="-5%"
+            width="110%"
+            height="110%">
+            <FeFlood floodColor="#ffffff" floodOpacity="1" result="flood" />
+            <FeComposite
+              in="SourceGraphic"
+              in2="BackgroundImage"
+              operator="in"
+              result="comp"
+            />
+            <FeMerge>
+              <FeMergeNode in="flood" />
+              <FeMergeNode in="comp" />
+            </FeMerge>
+          </Filter>
+          <Filter
+            id="outFlood"
+            filterUnits="objectBoundingBox"
+            x="-5%"
+            y="-5%"
+            width="110%"
+            height="110%">
+            <FeFlood floodColor="#ffffff" floodOpacity="1" result="flood" />
+            <FeComposite
+              in="SourceGraphic"
+              in2="BackgroundImage"
+              operator="out"
+              result="comp"
+            />
+            <FeMerge>
+              <FeMergeNode in="flood" />
+              <FeMergeNode in="comp" />
+            </FeMerge>
+          </Filter>
+          <Filter
+            id="atopFlood"
+            filterUnits="objectBoundingBox"
+            x="-5%"
+            y="-5%"
+            width="110%"
+            height="110%">
+            <FeFlood floodColor="#ffffff" floodOpacity="1" result="flood" />
+            <FeComposite
+              in="SourceGraphic"
+              in2="BackgroundImage"
+              operator="atop"
+              result="comp"
+            />
+            <FeMerge>
+              <FeMergeNode in="flood" />
+              <FeMergeNode in="comp" />
+            </FeMerge>
+          </Filter>
+          <Filter
+            id="xorFlood"
+            filterUnits="objectBoundingBox"
+            x="-5%"
+            y="-5%"
+            width="110%"
+            height="110%">
+            <FeFlood floodColor="#ffffff" floodOpacity="1" result="flood" />
+            <FeComposite
+              in="SourceGraphic"
+              in2="BackgroundImage"
+              operator="xor"
+              result="comp"
+            />
+            <FeMerge>
+              <FeMergeNode in="flood" />
+              <FeMergeNode in="comp" />
+            </FeMerge>
+          </Filter>
+          <Filter
+            id="arithmeticFlood"
+            filterUnits="objectBoundingBox"
+            x="-5%"
+            y="-5%"
+            width="110%"
+            height="110%">
+            <FeFlood floodColor="#ffffff" floodOpacity="1" result="flood" />
+            <FeComposite
+              in="SourceGraphic"
+              in2="BackgroundImage"
+              result="comp"
+              operator="arithmetic"
+              k1=".5"
+              k2=".5"
+              k3=".5"
+              k4=".5"
+            />
+            <FeMerge>
+              <FeMergeNode in="flood" />
+              <FeMergeNode in="comp" />
+            </FeMerge>
+          </Filter>
+          <Filter
+            id="overNoFlood"
+            filterUnits="objectBoundingBox"
+            x="-5%"
+            y="-5%"
+            width="110%"
+            height="110%">
+            <FeComposite
+              in="SourceGraphic"
+              in2="BackgroundImage"
+              operator="over"
+              result="comp"
+            />
+          </Filter>
+          <Filter
+            id="inNoFlood"
+            filterUnits="objectBoundingBox"
+            x="-5%"
+            y="-5%"
+            width="110%"
+            height="110%">
+            <FeComposite
+              in="SourceGraphic"
+              in2="BackgroundImage"
+              operator="in"
+              result="comp"
+            />
+          </Filter>
+          <Filter
+            id="outNoFlood"
+            filterUnits="objectBoundingBox"
+            x="-5%"
+            y="-5%"
+            width="110%"
+            height="110%">
+            <FeComposite
+              in="SourceGraphic"
+              in2="BackgroundImage"
+              operator="out"
+              result="comp"
+            />
+          </Filter>
+          <Filter
+            id="atopNoFlood"
+            filterUnits="objectBoundingBox"
+            x="-5%"
+            y="-5%"
+            width="110%"
+            height="110%">
+            <FeComposite
+              in="SourceGraphic"
+              in2="BackgroundImage"
+              operator="atop"
+              result="comp"
+            />
+          </Filter>
+          <Filter
+            id="xorNoFlood"
+            filterUnits="objectBoundingBox"
+            x="-5%"
+            y="-5%"
+            width="110%"
+            height="110%">
+            <FeComposite
+              in="SourceGraphic"
+              in2="BackgroundImage"
+              operator="xor"
+              result="comp"
+            />
+          </Filter>
+          <Filter
+            id="arithmeticNoFlood"
+            filterUnits="objectBoundingBox"
+            x="-5%"
+            y="-5%"
+            width="110%"
+            height="110%">
+            <FeComposite
+              in="SourceGraphic"
+              in2="BackgroundImage"
+              result="comp"
+              operator="arithmetic"
+              k1=".5"
+              k2=".5"
+              k3=".5"
+              k4=".5"
+            />
+          </Filter>
+          <Path id="Blue100" d="M 0 0 L 100 0 L 100 100 z" fill="#00ffff" />
+          <Path id="Red100" d="M 0 0 L 0 100 L 100 0 z" fill="#ff00ff" />
+          <Path
+            id="Blue50"
+            d="M 0 125 L 100 125 L 100 225 z"
+            fill="#00ffff"
+            fillOpacity=".5"
+          />
+          <Path
+            id="Red50"
+            d="M 0 125 L 0 225 L 100 125 z"
+            fill="#ff00ff"
+            fillOpacity=".5"
+          />
+          <G id="TwoBlueTriangles">
+            <Use href="#Blue100" />
+            <Use href="#Blue50" />
+          </G>
+          <G id="BlueTriangles">
+            <Use transform="translate(275,25)" href="#TwoBlueTriangles" />
+            <Use transform="translate(400,25)" href="#TwoBlueTriangles" />
+            <Use transform="translate(525,25)" href="#TwoBlueTriangles" />
+            <Use transform="translate(650,25)" href="#TwoBlueTriangles" />
+            <Use transform="translate(775,25)" href="#TwoBlueTriangles" />
+            <Use transform="translate(900,25)" href="#TwoBlueTriangles" />
+          </G>
+        </Defs>
+
+        <Rect fill="none" stroke="blue" x="1" y="1" width="1098" height="648" />
+        <G font-family="Verdana" fontSize="40" shape-rendering="crispEdges">
+          <G enable-background="new">
+            <Text x="15" y="75">
+              opacity 1.0
+            </Text>
+            <Text x="15" y="115" fontSize="27">
+              (with FeFlood)
+            </Text>
+            <Text x="15" y="200">
+              opacity 0.5
+            </Text>
+            <Text x="15" y="240" fontSize="27">
+              (with FeFlood)
+            </Text>
+            <Use href="#BlueTriangles" />
+            <G transform="translate(275,25)">
+              <Use href="#Red100" filter="url(#overFlood)" />
+              <Use href="#Red50" filter="url(#overFlood)" />
+              <Text x="5" y="275">
+                over
+              </Text>
+            </G>
+            <G transform="translate(400,25)">
+              <Use href="#Red100" filter="url(#inFlood)" />
+              <Use href="#Red50" filter="url(#inFlood)" />
+              <Text x="35" y="275">
+                in
+              </Text>
+            </G>
+            <G transform="translate(525,25)">
+              <Use href="#Red100" filter="url(#outFlood)" />
+              <Use href="#Red50" filter="url(#outFlood)" />
+              <Text x="15" y="275">
+                out
+              </Text>
+            </G>
+            <G transform="translate(650,25)">
+              <Use href="#Red100" filter="url(#atopFlood)" />
+              <Use href="#Red50" filter="url(#atopFlood)" />
+              <Text x="10" y="275">
+                atop
+              </Text>
+            </G>
+            <G transform="translate(775,25)">
+              <Use href="#Red100" filter="url(#xorFlood)" />
+              <Use href="#Red50" filter="url(#xorFlood)" />
+              <Text x="15" y="275">
+                xor
+              </Text>
+            </G>
+            <G transform="translate(900,25)">
+              <Use href="#Red100" filter="url(#arithmeticFlood)" />
+              <Use href="#Red50" filter="url(#arithmeticFlood)" />
+              <Text x="-25" y="275">
+                arithmetic
+              </Text>
+            </G>
+          </G>
+          <G transform="translate(0,325)" enable-background="new">
+            <Text x="15" y="75">
+              opacity 1.0
+            </Text>
+            <Text x="15" y="115" fontSize="27">
+              (without FeFlood)
+            </Text>
+            <Text x="15" y="200">
+              opacity 0.5
+            </Text>
+            <Text x="15" y="240" fontSize="27">
+              (without FeFlood)
+            </Text>
+            <Use href="#BlueTriangles" />
+            <G transform="translate(275,25)">
+              <Use href="#Red100" filter="url(#overNoFlood)" />
+              <Use href="#Red50" filter="url(#overNoFlood)" />
+              <Text x="5" y="275">
+                over
+              </Text>
+            </G>
+            <G transform="translate(400,25)">
+              <Use href="#Red100" filter="url(#inNoFlood)" />
+              <Use href="#Red50" filter="url(#inNoFlood)" />
+              <Text x="35" y="275">
+                in
+              </Text>
+            </G>
+            <G transform="translate(525,25)">
+              <Use href="#Red100" filter="url(#outNoFlood)" />
+              <Use href="#Red50" filter="url(#outNoFlood)" />
+              <Text x="15" y="275">
+                out
+              </Text>
+            </G>
+            <G transform="translate(650,25)">
+              <Use href="#Red100" filter="url(#atopNoFlood)" />
+              <Use href="#Red50" filter="url(#atopNoFlood)" />
+              <Text x="10" y="275">
+                atop
+              </Text>
+            </G>
+            <G transform="translate(775,25)">
+              <Use href="#Red100" filter="url(#xorNoFlood)" />
+              <Use href="#Red50" filter="url(#xorNoFlood)" />
+              <Text x="15" y="275">
+                xor
+              </Text>
+            </G>
+            <G transform="translate(900,25)">
+              <Use href="#Red100" filter="url(#arithmeticNoFlood)" />
+              <Use href="#Red50" filter="url(#arithmeticNoFlood)" />
+              <Text x="-25" y="275">
+                arithmetic
+              </Text>
+            </G>
+          </G>
+        </G>
+      </Svg>
+      <RNText>W3 Reference</RNText>
+      <Image source={require('./feComposite.png')} />
+    </View>
+  );
+}
+
+const icon = (
+  <Svg height="30" width="30" viewBox="0 0 20 20">
+    <Filter id="iconCompositeIn" width="200%">
+      <FeComposite
+        in="SourceGraphic"
+        in2="BackgroundImage"
+        operator="in"
+        result="comp"
+      />
+    </Filter>
+    <Path id="Blue100" d="M 0 0 L 20 0 L 20 20 z" fill="#00ffff" />
+    <Path
+      id="Red100"
+      d="M 0 0 L 0 20 L 20 0 z"
+      fill="#ff00ff"
+      filter="url(#iconCompositeIn)"
+    />
+  </Svg>
+);
+const samples = [QuickTestExample, ReferenceExample];
+
+export {icon, samples};

apps/examples/src/examples/Filters/index.tsx

@@ -2,6 +2,7 @@ import React from 'react';
 import Svg, {Circle} from 'react-native-svg';
 import * as FeBlend from './FeBlend';
 import * as FeColorMatrix from './FeColorMatrix';
+import * as FeComposite from './FeComposite';
 import * as FeFlood from './FeFlood';
 import * as FeGaussianBlur from './FeGaussianBlur';
 import * as FeMerge from './FeMerge';
@@ -11,6 +12,7 @@ import * as ReanimatedFeColorMatrix from './ReanimatedFeColorMatrix';
 const samples = {
   FeBlend,
   FeColorMatrix,
+  FeComposite,
   FeFlood,
   FeGaussianBlur,
   FeMerge,

package.json

@@ -61,7 +61,8 @@
     "e2e": "jest e2e",
     "generateE2eReferences": "ts-node e2e/generateReferences.ts",
     "check-archs-consistency": "node ./scripts/codegen-check-consistency.js",
-    "sync-archs": "node ./scripts/codegen-sync-archs.js"
+    "sync-archs": "node ./scripts/codegen-sync-archs.js",
+    "metal-to-ci": "node ./scripts/metal.js"
   },
   "peerDependencies": {
     "react": "*",

react-native.config.js

@@ -19,6 +19,7 @@ module.exports = {
               'RNSVGDefsComponentDescriptor',
               'RNSVGFeBlendComponentDescriptor',
               'RNSVGFeColorMatrixComponentDescriptor',
+              'RNSVGFeCompositeComponentDescriptor',
               'RNSVGFeFloodComponentDescriptor',
               'RNSVGFeGaussianBlurComponentDescriptor',
               'RNSVGFeMergeComponentDescriptor',

scripts/metal.js

@@ -0,0 +1,56 @@
+const fs = require('fs');
+const path = require('path');
+const { execSync } = require('child_process');
+
+const ROOT_DIR = path.resolve(__dirname, '..');
+const FILTERS_DIR = path.resolve(ROOT_DIR, 'apple/Filters/MetalCI');
+
+function exec(command) {
+  execSync(command);
+}
+
+function clearGeneratedFiles() {
+  const files = fs.readdirSync(FILTERS_DIR);
+  console.log('Removing generated files...');
+  files.forEach((file) => {
+    const filePath = path.join(FILTERS_DIR, file);
+    const fileExtension = path.extname(file);
+    if (fileExtension === '.air' || fileExtension === '.metallib') {
+      exec(`rm -rf ${filePath}`);
+    }
+  });
+  console.log('Generated files removed.');
+}
+
+function compileMetalFile(file, sdk) {
+  const filePath = path.join(FILTERS_DIR, file);
+  const fileName = path.basename(filePath).replace('.metal', '');
+  const filePathWithoutExt = path.join(FILTERS_DIR, file).replace('.metal', '');
+  console.log('* for ' + sdk);
+  exec(
+    `xcrun -sdk ${sdk} metal -fcikernel -c ${filePathWithoutExt}.metal -o ${filePathWithoutExt}.${sdk}.air`
+  );
+  console.log(` ├─ ${fileName}.${sdk}.air`);
+  exec(
+    `xcrun -sdk ${sdk} metallib -cikernel ${filePathWithoutExt}.${sdk}.air -o ${filePathWithoutExt}.${sdk}.metallib`
+  );
+  console.log(` └─ ${fileName}.${sdk}.metallib`);
+}
+
+function generateMetallib() {
+  const files = fs.readdirSync(FILTERS_DIR);
+  files.forEach((file) => {
+    const fileExtension = path.extname(file);
+    if (fileExtension === '.metal') {
+      const fileName = path.basename(file).replace('.metal', '');
+      console.log('Compiling:', fileName + '.metal');
+      compileMetalFile(file, 'macosx');
+      compileMetalFile(file, 'iphoneos');
+      compileMetalFile(file, 'appletvos');
+      compileMetalFile(file, 'xros');
+    }
+  });
+}
+
+clearGeneratedFiles();
+generateMetallib();

src/ReactNativeSVG.ts

@@ -26,6 +26,7 @@ import {
   RNSVGDefs,
   RNSVGEllipse,
   RNSVGFeColorMatrix,
+  RNSVGFeComposite,
   RNSVGFeGaussianBlur,
   RNSVGFeMerge,
   RNSVGFeOffset,
@@ -125,6 +126,7 @@ export {
   RNSVGDefs,
   RNSVGEllipse,
   RNSVGFeColorMatrix,
+  RNSVGFeComposite,
   RNSVGFeGaussianBlur,
   RNSVGFeMerge,
   RNSVGFeOffset,

src/elements/filters/FeComposite.tsx

@@ -1,5 +1,10 @@
+import { NativeMethods } from 'react-native';
+import RNSVGFeComposite from '../../fabric/FeCompositeNativeComponent';
+import {
+  extractFeComposite,
+  extractFilter,
+} from '../../lib/extract/extractFilter';
 import { NumberProp } from '../../lib/extract/types';
-import { warnUnimplementedFilter } from '../../lib/util';
 import FilterPrimitive from './FilterPrimitive';
 
 type FeCompositeOperator =
@@ -28,7 +33,14 @@ export default class FeComposite extends FilterPrimitive<FeCompositeProps> {
   };
 
   render() {
-    warnUnimplementedFilter();
-    return null;
+    return (
+      <RNSVGFeComposite
+        ref={(ref) =>
+          this.refMethod(ref as (FeComposite & NativeMethods) | null)
+        }
+        {...extractFilter(this.props)}
+        {...extractFeComposite(this.props)}
+      />
+    );
   }
 }

src/fabric/FeCompositeNativeComponent.ts

@@ -0,0 +1,34 @@
+import codegenNativeComponent from 'react-native/Libraries/Utilities/codegenNativeComponent';
+import type { ViewProps } from './utils';
+
+import { NumberProp } from '../lib/extract/types';
+import type { UnsafeMixed } from './codegenUtils';
+import { Float, WithDefault } from 'react-native/Libraries/Types/CodegenTypes';
+
+type FeCompositeOperator =
+  | 'over'
+  | 'in'
+  | 'out'
+  | 'atop'
+  | 'xor'
+  | 'arithmetic';
+
+interface FilterPrimitiveCommonProps {
+  x?: UnsafeMixed<NumberProp>;
+  y?: UnsafeMixed<NumberProp>;
+  width?: UnsafeMixed<NumberProp>;
+  height?: UnsafeMixed<NumberProp>;
+  result?: string;
+}
+
+export interface NativeProps extends ViewProps, FilterPrimitiveCommonProps {
+  in1?: string;
+  in2?: string;
+  operator1?: WithDefault<FeCompositeOperator, 'over'>;
+  k1?: Float;
+  k2?: Float;
+  k3?: Float;
+  k4?: Float;
+}
+
+export default codegenNativeComponent<NativeProps>('RNSVGFeComposite');

src/fabric/index.ts

@@ -23,6 +23,7 @@ import RNSVGUse from './UseNativeComponent';
 import RNSVGFilter from './FilterNativeComponent';
 import RNSVGFeBlend from './FeBlendNativeComponent';
 import RNSVGFeColorMatrix from './FeColorMatrixNativeComponent';
+import RNSVGFeComposite from './FeCompositeNativeComponent';
 import RNSVGFeFlood from './FeFloodNativeComponent';
 import RNSVGFeGaussianBlur from './FeGaussianBlurNativeComponent';
 import RNSVGFeMerge from './FeMergeNativeComponent';
@@ -54,6 +55,7 @@ export {
   RNSVGFilter,
   RNSVGFeBlend,
   RNSVGFeColorMatrix,
+  RNSVGFeComposite,
   RNSVGFeFlood,
   RNSVGFeGaussianBlur,
   RNSVGFeMerge,

src/lib/extract/extractFilter.ts

@@ -2,11 +2,13 @@ import React from 'react';
 import { ColorValue, processColor } from 'react-native';
 import { FeBlendProps as FeBlendComponentProps } from '../../elements/filters/FeBlend';
 import { FeColorMatrixProps as FeColorMatrixComponentProps } from '../../elements/filters/FeColorMatrix';
+import { FeCompositeProps as FeCompositeComponentProps } from '../../elements/filters/FeComposite';
 import { FeFloodProps as FeFloodComponentProps } from '../../elements/filters/FeFlood';
 import { FeGaussianBlurProps as FeGaussianBlurComponentProps } from '../../elements/filters/FeGaussianBlur';
 import { FeMergeProps as FeMergeComponentProps } from '../../elements/filters/FeMerge';
 import { NativeProps as FeBlendNativeProps } from '../../fabric/FeBlendNativeComponent';
 import { NativeProps as FeColorMatrixNativeProps } from '../../fabric/FeColorMatrixNativeComponent';
+import { NativeProps as FeCompositeNativeProps } from '../../fabric/FeCompositeNativeComponent';
 import { NativeProps as FeFloodNativeProps } from '../../fabric/FeFloodNativeComponent';
 import { NativeProps as FeGaussianBlurNativeProps } from '../../fabric/FeGaussianBlurNativeComponent';
 import { NativeProps as FeMergeNativeProps } from '../../fabric/FeMergeNativeComponent';
@@ -89,6 +91,24 @@ export const extractFeColorMatrix = (
   return extracted;
 };
 
+export const extractFeComposite = (
+  props: FeCompositeComponentProps
+): FeCompositeNativeProps => {
+  const extracted: FeCompositeNativeProps = {
+    in1: props.in || '',
+    in2: props.in2 || '',
+    operator1: props.operator || 'over',
+  };
+
+  (['k1', 'k2', 'k3', 'k4'] as const).forEach((key) => {
+    if (props[key] !== undefined) {
+      extracted[key] = Number(props[key]) || 0;
+    }
+  });
+
+  return extracted;
+};
+
 const defaultFill = { type: 0, payload: processColor('black') as ColorValue };
 export default function extractFeFlood(
   props: FeFloodComponentProps