Function getNativePointArray

jni/platform/jni_bridge.cpp:40–61

}

std::vector<cv::Point2f> getNativePointArray(JNIEnv *env, jobjectArray _points)
{
	jclass class_PointF = env->FindClass("android/graphics/PointF");
	jfieldID field_x = env->GetFieldID(class_PointF, "x", "F");
	jfieldID field_y = env->GetFieldID(class_PointF, "y", "F");
	assert(class_PointF != nullptr);
	assert(field_x != nullptr && field_y != nullptr);

	// Get<Primitive>ArrayRegion, no GetObjectArrayRegion method, fetch element one by one.
	jsize feature_point_count = env->GetArrayLength(_points);
	std::vector<cv::Point2f> points(feature_point_count);
	for(jsize i = 0; i < feature_point_count; ++i)
	{
		jobject element = env->GetObjectArrayElement(_points, i);
		float x = env->GetFloatField(element, field_x);
		float y = env->GetFloatField(element, field_y);
		points[i] = cv::Point2f(x, y);
		env->DeleteLocalRef(element);
	}

	return points;
}

#ifdef ANDROID
uint32_t* lockJavaBitmap(JNIEnv* env, jobject bitmap, AndroidBitmapInfo& info)