From 1850f43fe746215a0847a708f501a3efcd42decc Mon Sep 17 00:00:00 2001
From: Sebastian Schmidt <mrschmidt@google.com>
Date: Thu, 10 Oct 2024 10:08:47 -0700
Subject: [PATCH] Internal

PiperOrigin-RevId: 684485873
---
 third_party/external_files.bzl                | 10 +-
 third_party/prebuilts/BUILD                   |  1 +
 third_party/prebuilts/opencv_ios_source.BUILD | 97 +++++++++++++++++++
 3 files changed, 106 insertions(+), 2 deletions(-)
 create mode 100644 third_party/prebuilts/opencv_ios_source.BUILD

diff --git a/third_party/external_files.bzl b/third_party/external_files.bzl
index 500ab07651..cb07233293 100644
--- a/third_party/external_files.bzl
+++ b/third_party/external_files.bzl
@@ -288,8 +288,8 @@ def external_files():
 
     http_file(
         name = "com_google_mediapipe_efficientdet_lite0_fp16_no_nms_tflite",
-        sha256 = "237a58389081333e5cf4154e42b593ce7dd357445536fcaf4ca5bc51c2c50f1c",
-        urls = ["https://storage.googleapis.com/mediapipe-assets/efficientdet_lite0_fp16_no_nms.tflite?generation=1693610182046114"],
+        sha256 = "bcda125c96d3767bca894c8cbe7bc458379c9974c9fd8bdc6204e7124a74082a",
+        urls = ["https://storage.googleapis.com/mediapipe-assets/efficientdet_lite0_fp16_no_nms.tflite?generation=1728573738871723"],
     )
 
     http_file(
@@ -1018,6 +1018,12 @@ def external_files():
         urls = ["https://storage.googleapis.com/mediapipe-assets/ocr_text.jpg?generation=1681244241009078"],
     )
 
+    http_file(
+        name = "com_google_mediapipe_opencv2_xcframework_zip",
+        sha256 = "6b625f564b72fd7c0946de2ae61507bed5daf84f3dbb5296ef4fef19da491160",
+        urls = ["https://storage.googleapis.com/mediapipe-assets/opencv2.xcframework.zip?generation=1728573757773068"],
+    )
+
     http_file(
         name = "com_google_mediapipe_palm_detection_full_tflite",
         sha256 = "1b14e9422c6ad006cde6581a46c8b90dd573c07ab7f3934b5589e7cea3f89a54",
diff --git a/third_party/prebuilts/BUILD b/third_party/prebuilts/BUILD
index d1c0da4ddf..5597763bce 100644
--- a/third_party/prebuilts/BUILD
+++ b/third_party/prebuilts/BUILD
@@ -13,6 +13,7 @@ mediapipe_files(srcs = [
     "libopencv_core.3.4.darwin_arm64.a",
     "libopencv_imgproc.3.4.darwin.a",
     "libopencv_imgproc.3.4.darwin_arm64.a",
+    "opencv2.xcframework.zip",
 ])
 
 cc_import(
diff --git a/third_party/prebuilts/opencv_ios_source.BUILD b/third_party/prebuilts/opencv_ios_source.BUILD
new file mode 100644
index 0000000000..42f0e1344a
--- /dev/null
+++ b/third_party/prebuilts/opencv_ios_source.BUILD
@@ -0,0 +1,97 @@
+# Description:
+#   OpenCV xcframework for video/image processing on iOS.
+
+load(
+    "@//third_party:opencv_ios_source.bzl",
+    "select_headers",
+    "unzip_opencv_xcframework",
+)
+load(
+    "@build_bazel_rules_apple//apple:apple.bzl",
+    "apple_static_xcframework_import",
+)
+
+licenses(["notice"])  # BSD license
+
+exports_files(["LICENSE"])
+
+genrule(
+    name = "build_opencv_xcframework",
+    srcs = ["@mediapipe//third_party/prebuilts:opencv2.xcframework.zip"],
+    outs = ["opencv2.xcframework.zip"],
+    cmd = "cp $(SRCS) $(OUTS)",
+)
+
+# Unzips `opencv2.xcframework.zip` built from source by `build_opencv_xcframework`
+# genrule and returns an exhaustive list of all its files including symlinks.
+unzip_opencv_xcframework(
+    name = "opencv2_unzipped_xcframework_files",
+    zip_file = "opencv2.xcframework.zip",
+)
+
+# Imports the files of the unzipped `opencv2.xcframework` as an apple static
+# framework which can be linked to iOS targets.
+apple_static_xcframework_import(
+    name = "opencv_xcframework",
+    visibility = ["//visibility:public"],
+    xcframework_imports = [":opencv2_unzipped_xcframework_files"],
+)
+
+# Filters the headers for each platform in `opencv2.xcframework` which will be
+# used as headers in a `cc_library` that can be linked to C++ targets.
+select_headers(
+    name = "opencv_xcframework_device_headers",
+    srcs = [":opencv_xcframework"],
+    platform = "ios-arm64",
+)
+
+select_headers(
+    name = "opencv_xcframework_simulator_headers",
+    srcs = [":opencv_xcframework"],
+    platform = "ios-arm64_x86_64-simulator",
+)
+
+# `cc_library` that can be linked to C++ targets to import opencv headers.
+cc_library(
+    name = "opencv",
+    hdrs = select({
+        "@//mediapipe:ios_x86_64": [
+            ":opencv_xcframework_simulator_headers",
+        ],
+        "@//mediapipe:ios_sim_arm64": [
+            ":opencv_xcframework_simulator_headers",
+        ],
+        "@//mediapipe:ios_arm64": [
+            ":opencv_xcframework_device_headers",
+        ],
+        # A value from above is chosen arbitarily.
+        "//conditions:default": [
+            ":opencv_xcframework_simulator_headers",
+        ],
+    }),
+    copts = [
+        "-std=c++11",
+        "-x objective-c++",
+    ],
+    include_prefix = "opencv2",
+    linkopts = [
+        "-framework AssetsLibrary",
+        "-framework CoreFoundation",
+        "-framework CoreGraphics",
+        "-framework CoreMedia",
+        "-framework Accelerate",
+        "-framework CoreImage",
+        "-framework AVFoundation",
+        "-framework CoreVideo",
+        "-framework QuartzCore",
+    ],
+    strip_include_prefix = select({
+        "@//mediapipe:ios_x86_64": "opencv2.xcframework/ios-arm64_x86_64-simulator/opencv2.framework/Versions/A/Headers",
+        "@//mediapipe:ios_sim_arm64": "opencv2.xcframework/ios-arm64_x86_64-simulator/opencv2.framework/Versions/A/Headers",
+        "@//mediapipe:ios_arm64": "opencv2.xcframework/ios-arm64/opencv2.framework/Versions/A/Headers",
+        # Random value is selected for default cases.
+        "//conditions:default": "opencv2.xcframework/ios-arm64_x86_64-simulator/opencv2.framework/Versions/A/Headers",
+    }),
+    visibility = ["//visibility:public"],
+    deps = [":opencv_xcframework"],
+)