Parse raw filter props (#44455)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/44455

Title says it all. Right now this ignores drop-shadow as that will be implemented later. Some of this code will need to be adjusted as it is the one filter that takes multiple amounts. But I feel that can be amended later when we get there - after all the `amount` parsing code is just casting to a float at the moment, so we are not locking ourselves into anything.

Changelog: [Internal]

Reviewed By: NickGerleman

Differential Revision: D54640629

fbshipit-source-id: c8e1206ab46accab3c99614241b8bd9aa252e12c

packages/react-native/ReactCommon/react/renderer/components/view/BaseViewProps.cpp

@@ -150,6 +150,14 @@ BaseViewProps::BaseViewProps(
                                                        "cursor",
                                                        sourceProps.cursor,
                                                        {})),
+      filter(
+          CoreFeatures::enablePropIteratorSetter ? sourceProps.filter
+                                                 : convertRawProp(
+                                                       context,
+                                                       rawProps,
+                                                       "experimental_filter",
+                                                       sourceProps.filter,
+                                                       {})),
       transform(
           CoreFeatures::enablePropIteratorSetter ? sourceProps.transform
                                                  : convertRawProp(

packages/react-native/ReactCommon/react/renderer/components/view/BaseViewProps.h

@@ -14,6 +14,7 @@
 #include <react/renderer/core/Props.h>
 #include <react/renderer/core/PropsParserContext.h>
 #include <react/renderer/graphics/Color.h>
+#include <react/renderer/graphics/Filter.h>
 #include <react/renderer/graphics/Transform.h>
 
 #include <optional>
@@ -54,6 +55,9 @@ class BaseViewProps : public YogaStylableProps, public AccessibilityProps {
 
   Cursor cursor{};
 
+  // Filter
+  std::vector<FilterPrimitive> filter{};
+
   // Transform
   Transform transform{};
   TransformOrigin transformOrigin{

packages/react-native/ReactCommon/react/renderer/components/view/conversions.h

@@ -15,6 +15,7 @@
 #include <react/renderer/core/LayoutMetrics.h>
 #include <react/renderer/core/PropsParserContext.h>
 #include <react/renderer/core/RawProps.h>
+#include <react/renderer/graphics/Filter.h>
 #include <react/renderer/graphics/Transform.h>
 #include <react/renderer/graphics/ValueUnit.h>
 #include <stdlib.h>
@@ -761,6 +762,48 @@ inline void fromRawValue(
   react_native_expect(false);
 }
 
+inline void fromRawValue(
+    const PropsParserContext& /*context*/,
+    const RawValue& value,
+    std::vector<FilterPrimitive>& result) {
+  react_native_expect(value.hasType<std::vector<RawValue>>());
+  if (!value.hasType<std::vector<RawValue>>()) {
+    result = {};
+    return;
+  }
+
+  std::vector<FilterPrimitive> filter{};
+  auto rawFilter = static_cast<std::vector<RawValue>>(value);
+  for (const auto& rawFilterPrimitive : rawFilter) {
+    bool isMap =
+        rawFilterPrimitive.hasType<std::unordered_map<std::string, RawValue>>();
+    react_native_expect(isMap);
+    if (!isMap) {
+      // If a filter is malformed then we should not apply any of them which
+      // is the web behavior.
+      result = {};
+      return;
+    }
+
+    auto rawFilterPrimitiveMap =
+        static_cast<std::unordered_map<std::string, RawValue>>(
+            rawFilterPrimitive);
+    FilterPrimitive filterPrimitive{};
+    try {
+      filterPrimitive.type =
+          filterTypeFromString(rawFilterPrimitiveMap.begin()->first);
+      filterPrimitive.amount = (float)rawFilterPrimitiveMap.begin()->second;
+      filter.push_back(filterPrimitive);
+    } catch (const std::exception& e) {
+      LOG(ERROR) << "Could not parse FilterPrimitive: " << e.what();
+      filter = {};
+      return;
+    }
+  }
+
+  result = filter;
+}
+
 template <size_t N>
 inline std::string toString(const std::array<float, N> vec) {
   std::string s;

packages/react-native/ReactCommon/react/renderer/graphics/Filter.h

@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#pragma once
+
+#include <react/renderer/graphics/Float.h>
+
+#include <string>
+#include <string_view>
+#include <vector>
+
+namespace facebook::react {
+
+enum class FilterType {
+  Blur,
+  Brightness,
+  Contrast,
+  Grayscale,
+  HueRotate,
+  Invert,
+  Opacity,
+  Saturate,
+  Sepia
+};
+
+struct FilterPrimitive {
+  bool operator==(const FilterPrimitive& other) const = default;
+
+  FilterType type;
+  Float amount;
+};
+
+inline FilterType filterTypeFromString(std::string_view filterName) {
+  if (filterName == "blur") {
+    return FilterType::Blur;
+  } else if (filterName == "brightness") {
+    return FilterType::Brightness;
+  } else if (filterName == "contrast") {
+    return FilterType::Contrast;
+  } else if (filterName == "grayscale") {
+    return FilterType::Grayscale;
+  } else if (filterName == "hueRotate") {
+    return FilterType::HueRotate;
+  } else if (filterName == "invert") {
+    return FilterType::Invert;
+  } else if (filterName == "opacity") {
+    return FilterType::Opacity;
+  } else if (filterName == "saturate") {
+    return FilterType::Saturate;
+  } else if (filterName == "sepia") {
+    return FilterType::Sepia;
+  } else {
+    throw std::invalid_argument(std::string(filterName));
+  }
+}
+
+} // namespace facebook::react