chore: import upstream snapshot with attribution

2026-07-13 12:06:04 +08:00
commit 86c9b1c39f
7743 changed files with 3316339 additions and 0 deletions
@@ -0,0 +1,30 @@
+cmake_minimum_required(VERSION 3.6)
+
+set(target mixed_sample)
+project(${target} CXX)
+
+if (OPENCV_FROM_SDK)
+  message(STATUS "Using OpenCV from local SDK")
+  set(ANDROID_OPENCV_COMPONENTS "opencv_java" CACHE STRING "")
+else()
+  message(STATUS "Using OpenCV from AAR (Maven repo)")
+  set(ANDROID_OPENCV_COMPONENTS "OpenCV::opencv_java${OPENCV_VERSION_MAJOR}" CACHE STRING "")
+endif()
+
+message(STATUS "ANDROID_ABI=${ANDROID_ABI}")
+find_package(OpenCV REQUIRED COMPONENTS ${ANDROID_OPENCV_COMPONENTS})
+
+# For 16k pages support with NDK prior 27
+# Details: https://developer.android.com/guide/practices/page-sizes?hl=en
+if(ANDROID_SUPPORT_FLEXIBLE_PAGE_SIZES)
+  if(ANDROID_ABI STREQUAL arm64-v8a OR ANDROID_ABI STREQUAL x86_64)
+    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,-z,max-page-size=16384")
+  endif()
+endif()
+
+file(GLOB srcs *.cpp *.c)
+file(GLOB hdrs *.hpp *.h)
+
+include_directories("${CMAKE_CURRENT_LIST_DIR}")
+add_library(${target} SHARED ${srcs} ${hdrs})
+target_link_libraries(${target} ${ANDROID_OPENCV_COMPONENTS})
@@ -0,0 +1,27 @@
+#include <jni.h>
+#include <opencv2/core.hpp>
+#include <opencv2/imgproc.hpp>
+#include <opencv2/features2d.hpp>
+#include <vector>
+
+using namespace std;
+using namespace cv;
+
+extern "C" {
+JNIEXPORT void JNICALL Java_org_opencv_samples_tutorial2_Tutorial2Activity_FindFeatures(JNIEnv*, jobject, jlong addrGray, jlong addrRgba);
+
+JNIEXPORT void JNICALL Java_org_opencv_samples_tutorial2_Tutorial2Activity_FindFeatures(JNIEnv*, jobject, jlong addrGray, jlong addrRgba)
+{
+    Mat& mGr  = *(Mat*)addrGray;
+    Mat& mRgb = *(Mat*)addrRgba;
+    vector<KeyPoint> v;
+
+    Ptr<FeatureDetector> detector = FastFeatureDetector::create(50);
+    detector->detect(mGr, v);
+    for( unsigned int i = 0; i < v.size(); i++ )
+    {
+        const KeyPoint& kp = v[i];
+        circle(mRgb, Point(kp.pt.x, kp.pt.y), 10, Scalar(255,0,0,255));
+    }
+}
+}