Added iOS region of interest helpers

mediapipe/tasks/ios/components/containers/utils/BUILD

@@ -16,6 +16,7 @@ package(default_visibility = ["//mediapipe/tasks:internal"])
 
 licenses(["notice"])
 
+
 objc_library(
     name = "MPPCategoryHelpers",
     srcs = ["sources/MPPCategory+Helpers.mm"],
@@ -84,3 +85,15 @@ objc_library(
         "//mediapipe/tasks/ios/components/containers:MPPLandmark",
     ],
 )
+
+objc_library(
+    name = "MPPRegionOfInterestHelpers",
+    srcs = ["sources/MPPRegionOfInterest+Helpers.mm"],
+    hdrs = ["sources/MPPRegionOfInterest+Helpers.h"],
+    deps = [
+        "//mediapipe/util:render_data_cc_proto",
+        "//mediapipe/tasks/ios/common:MPPCommon",
+        "//mediapipe/tasks/ios/common/utils:MPPCommonUtils",
+        "//mediapipe/tasks/ios/components/containers:MPPRegionOfInterest",
+    ],
+)

mediapipe/tasks/ios/components/containers/utils/sources/MPPRegionOfInterest+Helpers.h

@@ -0,0 +1,35 @@
+// Copyright 2023 The MediaPipe Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "mediapipe/util/render_data.pb.h"
+
+#import "mediapipe/tasks/ios/components/containers/sources/MPPRegionOfInterest.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface MPPRegionOfInterest (Helpers)
+
+/**
+ * Creates a `RenderData` from the region of interest.
+ *
+ * @param error Pointer to the memory location where errors if any should be saved. If @c NULL, no
+ * error will be saved.
+ *
+ * @return A `RenderData1 proto created from the region of interest.
+ */
+- (std::optional<mediapipe::RenderData>)getRenderDataWithError:(NSError **)error;
+
+@end
+
+NS_ASSUME_NONNULL_END

mediapipe/tasks/ios/components/containers/utils/sources/MPPRegionOfInterest+Helpers.mm

@@ -0,0 +1,56 @@
+// Copyright 2023 The MediaPipe Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import "mediapipe/tasks/ios/common/sources/MPPCommon.h"
+#import "mediapipe/tasks/ios/common/utils/sources/MPPCommonUtils.h"
+#import "mediapipe/tasks/ios/components/containers/utils/sources/MPPRegionOfInterest+Helpers.h"
+
+namespace {
+using RenderData = ::mediapipe::RenderData;
+using RenderAnnotation = ::mediapipe::RenderAnnotation;
+
+}  // namespace
+
+@implementation MPPRegionOfInterest (Helpers)
+
+- (std::optional<mediapipe::RenderData>)getRenderDataWithError:(NSError**)error {
+  RenderData result;
+  if (self.keypoint) {
+    auto* annotation = result.add_render_annotations();
+    annotation->mutable_color()->set_r(255);
+    auto* point = annotation->mutable_point();
+    point->set_normalized(true);
+    point->set_x(self.keypoint.location.x);
+    point->set_y(self.keypoint.location.y);
+    return result;
+  } else if (self.scribbles) {
+    auto* annotation = result.add_render_annotations();
+    annotation->mutable_color()->set_r(255);
+    for (MPPNormalizedKeypoint* keypoint in self.scribbles) {
+      auto* point = annotation->mutable_scribble()->add_point();
+      point->set_normalized(true);
+      point->set_x(self.keypoint.location.x);
+      point->set_y(self.keypoint.location.y);
+    }
+    return result;
+  }
+
+  [MPPCommonUtils createCustomError:error
+                           withCode:MPPTasksErrorCodeInvalidArgumentError
+                        description:@"RegionOfInterest does not include a valid user interaction."];
+
+  return std::nullopt;
+}
+
+@end