opencv/cxx/mat.cc

#include "mat.h"


using namespace Napi;

#define MAT_INSTANCE_METHOD(method) InstanceMethod<&CVMat::method>(#method, static_cast<napi_property_attributes>(napi_writable | napi_configurable))
#define MAT_STATIC_METHOD(method) StaticMethod<&CVMat::method>(#method, static_cast<napi_property_attributes>(napi_writable | napi_configurable))
#define NODE_FUNCTION_IMPL(name) Napi::Value CVMat::name(const Napi::CallbackInfo &info)

FunctionReference *CVMat::constructor = nullptr;

Napi::Object CVMat::Init(Napi::Env env, Napi::Object exports)
{
	Function func = DefineClass(env, "Mat", {
												MAT_STATIC_METHOD(ImRead),
												MAT_STATIC_METHOD(ImDecode),
												MAT_STATIC_METHOD(ImWrite),
												MAT_STATIC_METHOD(ImEncode),

												MAT_STATIC_METHOD(Crop),
												MAT_STATIC_METHOD(Resize),
												MAT_STATIC_METHOD(WarpAffine),
												MAT_STATIC_METHOD(Blur),
												MAT_STATIC_METHOD(CopyMakeBorder),
												MAT_STATIC_METHOD(Flip),
												MAT_STATIC_METHOD(GetRotationMatrix2D),

												MAT_STATIC_METHOD(Rectangle),
												MAT_STATIC_METHOD(Circle),
												MAT_STATIC_METHOD(Line),
												MAT_STATIC_METHOD(Ellipse),
												MAT_STATIC_METHOD(Polylines),
												MAT_STATIC_METHOD(FillPoly),
												MAT_STATIC_METHOD(FillConvexPoly),
												MAT_STATIC_METHOD(DrawMarker),
												MAT_STATIC_METHOD(PutText),

												MAT_INSTANCE_METHOD(IsEmpty),
												MAT_INSTANCE_METHOD(GetCols),
												MAT_INSTANCE_METHOD(GetRows),
												MAT_INSTANCE_METHOD(GetType),
												MAT_INSTANCE_METHOD(GetDepth),
												MAT_INSTANCE_METHOD(GetChannels),
												MAT_INSTANCE_METHOD(GetFlags),
												MAT_INSTANCE_METHOD(GetDims),
												MAT_INSTANCE_METHOD(GetIsContinuous),
												MAT_INSTANCE_METHOD(GetIsSubmatrix),
												MAT_INSTANCE_METHOD(GetElemSize),
												MAT_INSTANCE_METHOD(GetElemSize1),
												MAT_INSTANCE_METHOD(GetTotal),
												MAT_INSTANCE_METHOD(GetTotalWithDim),
												MAT_INSTANCE_METHOD(GetSize),
												MAT_INSTANCE_METHOD(GetData),

												MAT_INSTANCE_METHOD(Col),
												MAT_INSTANCE_METHOD(ColRange),
												MAT_INSTANCE_METHOD(Row),
												MAT_INSTANCE_METHOD(RowRange),
												MAT_INSTANCE_METHOD(Diag),

												MAT_INSTANCE_METHOD(Clone),
												MAT_INSTANCE_METHOD(CopyTo),

											});
	constructor = new FunctionReference();
	*constructor = Napi::Persistent(func);
	exports.Set("Mat", func);
	env.SetInstanceData<FunctionReference>(constructor);
	return exports;
}

CVMat::CVMat(const CallbackInfo &info)
	: ObjectWrap<CVMat>(info)
{
	if (info.Length() >= 2) {
		auto sizesArray = info[0].As<Array>();
		std::vector<int> sizes(sizesArray.Length());
		for (auto i = 0; i < sizes.size(); ++i) sizes[i] = sizesArray.Get(i).As<Number>().Int32Value();
		auto type = info[1].As<Number>().Int32Value();
		// 使用sizes和type初始化
		if (info.Length() < 3) mat_ = cv::Mat(sizes, type);
		// 使用数据初始化
		else if (info[2].IsTypedArray()) {
			auto dataArray = info[2].As<TypedArray>();
			auto data = static_cast<uint8_t *>(dataArray.ArrayBuffer().Data()) + dataArray.ByteOffset();
			mat_ = cv::Mat(sizes, type, data);
		}
		// 其他 TODO
		else mat_ = cv::Mat(sizes, type);
	}
}


NODE_FUNCTION_IMPL(ImRead)
{
	auto filename = info[0].As<String>().Utf8Value();
	int flag = (info.Length() >= 2) ? info[1].As<Number>().Int32Value() : cv::IMREAD_COLOR_BGR;
	return CreateMat(info.Env(), [&](CVMat &mat) { mat.mat_ = cv::imread(filename, flag); });
}
NODE_FUNCTION_IMPL(ImDecode)
{
	auto arr = info[0].As<TypedArray>();
	auto data = static_cast<uint8_t *>(arr.ArrayBuffer().Data()) + arr.ByteOffset();
	std::vector<uint8_t> buffer(data, data + arr.ByteLength());
	int flag = (info.Length() >= 2) ? info[1].As<Number>().Int32Value() : cv::IMREAD_COLOR_BGR;
	return CreateMat(info.Env(), [&](CVMat &mat) { mat.mat_ = cv::imdecode(buffer, flag); });
}
NODE_FUNCTION_IMPL(ImWrite)
{
	auto &mat = GetMat(info[0].As<Object>());
	auto filename = info[1].As<String>().Utf8Value();
	std::vector<int> params;
	if (info[2].IsArray()) {
		auto paramArray = info[2].As<Array>();
		params.resize(paramArray.Length());
		for (auto i = 0; i < params.size(); ++i) params[i] = paramArray.Get(i).As<Number>().Int32Value();
	}
	auto res = cv::imwrite(filename, mat.mat_, params);
	return Boolean::New(info.Env(), res);
}
NODE_FUNCTION_IMPL(ImEncode)
{
	auto &mat = GetMat(info[0].As<Object>());
	auto extname = info[1].As<String>().Utf8Value();
	std::vector<int> params;
	if (info[2].IsArray()) {
		auto paramArray = info[2].As<Array>();
		params.resize(paramArray.Length());
		for (auto i = 0; i < params.size(); ++i) params[i] = paramArray.Get(i).As<Number>().Int32Value();
	}
	std::vector<uchar> buf;
	if (!cv::imencode(extname, mat.mat_, buf, params)) return info.Env().Undefined();
	auto arrayBuffer = ArrayBuffer::New(info.Env(), buf.size());
	auto bufferPtr = static_cast<uchar *>(arrayBuffer.Data());
	for (auto ch : buf) {
		*bufferPtr = ch;
		bufferPtr++;
	}
	return arrayBuffer;
}


NODE_FUNCTION_IMPL(IsEmpty)
{
	return Boolean::New(info.Env(), mat_.empty());
}
NODE_FUNCTION_IMPL(GetCols)
{
	return Number::New(info.Env(), mat_.cols);
}
NODE_FUNCTION_IMPL(GetRows)
{
	return Number::New(info.Env(), mat_.rows);
}
NODE_FUNCTION_IMPL(GetType)
{
	return Number::New(info.Env(), mat_.type());
}
NODE_FUNCTION_IMPL(GetDepth)
{
	return Number::New(info.Env(), mat_.depth());
}
NODE_FUNCTION_IMPL(GetChannels)
{
	return Number::New(info.Env(), mat_.channels());
}
NODE_FUNCTION_IMPL(GetFlags)
{
	return Number::New(info.Env(), mat_.flags);
}
NODE_FUNCTION_IMPL(GetDims)
{
	return Number::New(info.Env(), mat_.dims);
}
NODE_FUNCTION_IMPL(GetIsContinuous)
{
	return Boolean::New(info.Env(), mat_.isContinuous());
}
NODE_FUNCTION_IMPL(GetIsSubmatrix)
{
	return Boolean::New(info.Env(), mat_.isSubmatrix());
}
NODE_FUNCTION_IMPL(GetElemSize)
{
	return Number::New(info.Env(), static_cast<double>(mat_.elemSize()));
}
NODE_FUNCTION_IMPL(GetElemSize1)
{
	return Number::New(info.Env(), static_cast<double>(mat_.elemSize1()));
}
NODE_FUNCTION_IMPL(GetTotal)
{
	return Number::New(info.Env(), static_cast<double>(mat_.total()));
}
NODE_FUNCTION_IMPL(GetTotalWithDim)
{
	return Number::New(info.Env(), static_cast<double>(mat_.total(info[0].As<Number>().Int32Value(), info[1].As<Number>().Int32Value())));
}
NODE_FUNCTION_IMPL(GetSize)
{
	auto ret = Array::New(info.Env(), mat_.dims);
	auto &size = mat_.size;
	for (int i = 0; i < mat_.dims; ++i) ret.Set(i, size[i]);
	return ret;
}
NODE_FUNCTION_IMPL(GetData)
{
	auto ptr = mat_.ptr();
	auto bytes = mat_.elemSize() * mat_.total();
	return ArrayBuffer::New(info.Env(), ptr, bytes);
}

NODE_FUNCTION_IMPL(Col)
{
	auto col = info[0].As<Number>().Int32Value();
	return CreateMat(info.Env(), [&](CVMat &mat) { mat.mat_ = mat_.col(col); });
}
NODE_FUNCTION_IMPL(ColRange)
{
	auto start = info[0].As<Number>().Int32Value();
	auto end = info[1].As<Number>().Int32Value();
	return CreateMat(info.Env(), [&](CVMat &mat) { mat.mat_ = mat_.colRange(start, end); });
}
NODE_FUNCTION_IMPL(Row)
{
	auto row = info[0].As<Number>().Int32Value();
	return CreateMat(info.Env(), [&](CVMat &mat) { mat.mat_ = mat_.row(row); });
}
NODE_FUNCTION_IMPL(RowRange)
{
	auto start = info[0].As<Number>().Int32Value();
	auto end = info[1].As<Number>().Int32Value();
	return CreateMat(info.Env(), [&](CVMat &mat) { mat.mat_ = mat_.rowRange(start, end); });
}
NODE_FUNCTION_IMPL(Diag)
{
	auto d = info[0].As<Number>().Int32Value();
	return CreateMat(info.Env(), [&](CVMat &mat) { mat.mat_ = mat_.diag(d); });
}


NODE_FUNCTION_IMPL(Clone)
{
	return CreateMat(info.Env(), [&](CVMat &mat) { mat.mat_ = mat_.clone(); });
}
NODE_FUNCTION_IMPL(CopyTo)
{
	auto &target = GetMat(info[0].As<Object>());
	mat_.copyTo(target.mat_);
	return info.Env().Undefined();
}

NODE_FUNCTION_IMPL(Crop)
{
	auto &src = GetMat(info[0].As<Object>());
	auto &dst = GetMat(info[1].As<Object>());
	auto rangeArray = info[2].As<Array>();
	std::vector<cv::Range> ranges(rangeArray.Length());
	for (int i = 0; i < ranges.size(); ++i) {
		auto item = rangeArray.Get(i).As<Object>();
		auto start = item.Get("start").As<Number>().Int32Value();
		auto end = item.Get("end").As<Number>().Int32Value();
		ranges[i] = cv::Range(start, end);
	}
	dst.mat_ = src.mat_(ranges);
	return info[1];
}
NODE_FUNCTION_IMPL(Resize)
{
	auto &src = GetMat(info[0].As<Object>());
	auto &dst = GetMat(info[1].As<Object>());
	auto width = info[2].As<Number>().Int32Value();
	auto height = info[3].As<Number>().Int32Value();
	auto fx = info[4].As<Number>().DoubleValue();
	auto fy = info[5].As<Number>().DoubleValue();
	auto interpolation = info[6].As<Number>().Int32Value();
	cv::resize(src.mat_, dst.mat_, cv::Size(width, height), fx, fy, interpolation);
	return info[1];
}
NODE_FUNCTION_IMPL(WarpAffine)
{
	auto &src = GetMat(info[0].As<Object>());
	auto &dst = GetMat(info[1].As<Object>());
	auto &transformMat = GetMat(info[2].As<Object>());
	auto dwidth = info[3].As<Number>().Int32Value();
	auto dheight = info[4].As<Number>().Int32Value();
	auto flags = info[5].As<Number>().Int32Value();
	auto borderMode = info[6].As<Number>().Int32Value();
	cv::warpAffine(src.mat_, dst.mat_, transformMat.mat_, cv::Size(dwidth, dheight), flags, borderMode);
	return info[1];
}
NODE_FUNCTION_IMPL(Blur)
{
	auto &src = GetMat(info[0].As<Object>());
	auto &dst = GetMat(info[1].As<Object>());
	auto kwidth = info[2].As<Number>().Int32Value();
	auto kheight = info[3].As<Number>().Int32Value();
	auto anchorX = info[4].As<Number>().Int32Value();
	auto anchorY = info[5].As<Number>().Int32Value();
	auto borderType = info[6].As<Number>().Int32Value();
	cv::blur(src.mat_, dst.mat_, cv::Size(kwidth, kheight), cv::Point(anchorX, anchorY), borderType);
	return info[1];
}
NODE_FUNCTION_IMPL(CopyMakeBorder)
{
	auto &src = GetMat(info[0].As<Object>());
	auto &dst = GetMat(info[1].As<Object>());
	auto top = info[2].As<Number>().Int32Value();
	auto bottom = info[3].As<Number>().Int32Value();
	auto left = info[4].As<Number>().Int32Value();
	auto right = info[5].As<Number>().Int32Value();
	auto borderType = info[6].As<Number>().Int32Value();
	cv::copyMakeBorder(src.mat_, dst.mat_, top, bottom, left, right, borderType);
	return info[1];
}
NODE_FUNCTION_IMPL(Flip)
{
	auto &src = GetMat(info[0].As<Object>());
	auto &dst = GetMat(info[1].As<Object>());
	auto flipCode = info[2].As<Number>().Int32Value();
	cv::flip(src.mat_, dst.mat_, flipCode);
	return info[1];
}
NODE_FUNCTION_IMPL(GetRotationMatrix2D)
{
	auto centerX = info[0].As<Number>().FloatValue();
	auto centerY = info[1].As<Number>().FloatValue();
	auto angle = info[2].As<Number>().DoubleValue();
	auto scale = info[3].As<Number>().DoubleValue();
	return CreateMat(info.Env(), [&](CVMat &mat) { mat.mat_ = cv::getRotationMatrix2D(cv::Point2f(centerX, centerY), angle, scale); });
}


NODE_FUNCTION_IMPL(Rectangle)
{
	auto &img = GetMat(info[0].As<Object>());
	auto x1 = info[1].As<Number>().Int32Value();
	auto y1 = info[2].As<Number>().Int32Value();
	auto x2 = info[3].As<Number>().Int32Value();
	auto y2 = info[4].As<Number>().Int32Value();
	auto b = info[5].As<Number>().DoubleValue();
	auto g = info[6].As<Number>().DoubleValue();
	auto r = info[7].As<Number>().DoubleValue();
	auto thickness = info[8].As<Number>().Int32Value();
	auto lineType = info[9].As<Number>().Int32Value();
	auto shift = info[10].As<Number>().Int32Value();
	cv::rectangle(img.mat_, cv::Point(x1, y1), cv::Point(x2, y2), cv::Scalar(b, g, r), thickness, lineType, shift);
	return info.Env().Undefined();
}
NODE_FUNCTION_IMPL(Circle)
{
	auto &img = GetMat(info[0].As<Object>());
	auto x = info[1].As<Number>().Int32Value();
	auto y = info[2].As<Number>().Int32Value();
	auto radius = info[3].As<Number>().Int32Value();
	auto b = info[4].As<Number>().DoubleValue();
	auto g = info[5].As<Number>().DoubleValue();
	auto r = info[6].As<Number>().DoubleValue();
	auto thickness = info[7].As<Number>().Int32Value();
	auto lineType = info[8].As<Number>().Int32Value();
	auto shift = info[9].As<Number>().Int32Value();
	cv::circle(img.mat_, cv::Point(x, y), radius, cv::Scalar(b, g, r), thickness, lineType, shift);
	return info.Env().Undefined();
}
NODE_FUNCTION_IMPL(Line)
{
	auto &img = GetMat(info[0].As<Object>());
	auto x1 = info[1].As<Number>().Int32Value();
	auto y1 = info[2].As<Number>().Int32Value();
	auto x2 = info[3].As<Number>().Int32Value();
	auto y2 = info[4].As<Number>().Int32Value();
	auto b = info[5].As<Number>().DoubleValue();
	auto g = info[6].As<Number>().DoubleValue();
	auto r = info[7].As<Number>().DoubleValue();
	auto thickness = info[8].As<Number>().Int32Value();
	auto lineType = info[9].As<Number>().Int32Value();
	auto shift = info[10].As<Number>().Int32Value();
	cv::line(img.mat_, cv::Point(x1, y1), cv::Point(x2, y2), cv::Scalar(b, g, r), thickness, lineType, shift);
	return info.Env().Undefined();
}
NODE_FUNCTION_IMPL(Ellipse)
{
	auto &img = GetMat(info[0].As<Object>());
	auto x = info[1].As<Number>().Int32Value();
	auto y = info[2].As<Number>().Int32Value();
	auto width = info[3].As<Number>().Int32Value();
	auto height = info[4].As<Number>().Int32Value();
	auto angle = info[5].As<Number>().DoubleValue();
	auto startAngle = info[6].As<Number>().DoubleValue();
	auto endAngle = info[7].As<Number>().DoubleValue();
	auto b = info[8].As<Number>().DoubleValue();
	auto g = info[9].As<Number>().DoubleValue();
	auto r = info[10].As<Number>().DoubleValue();
	auto thickness = info[11].As<Number>().Int32Value();
	auto lineType = info[12].As<Number>().Int32Value();
	auto shift = info[13].As<Number>().Int32Value();
	cv::ellipse(img.mat_, cv::Point(x, y), cv::Size(width, height), angle, startAngle, endAngle, cv::Scalar(b, g, r), thickness, lineType, shift);
	return info.Env().Undefined();
}
NODE_FUNCTION_IMPL(Polylines)
{
	auto &img = GetMat(info[0].As<Object>());
	auto points_ = info[1].As<Array>();
	std::vector<cv::Point> points(points_.Length());
	for (uint32_t i = 0; i < points_.Length(); i++) {
		auto pt = points_.Get(i).As<Array>();
		points[i] = cv::Point(pt.Get(0U).As<Number>().Int32Value(), pt.Get(1U).As<Number>().Int32Value());
	}
	auto isClosed = info[2].As<Boolean>().Value();
	auto b = info[3].As<Number>().DoubleValue();
	auto g = info[4].As<Number>().DoubleValue();
	auto r = info[5].As<Number>().DoubleValue();
	auto thickness = info[6].As<Number>().Int32Value();
	auto lineType = info[7].As<Number>().Int32Value();
	auto shift = info[8].As<Number>().Int32Value();
	cv::polylines(img.mat_, points, isClosed, cv::Scalar(b, g, r), thickness, lineType, shift);
	return info.Env().Undefined();
}
NODE_FUNCTION_IMPL(FillPoly)
{
	auto &img = GetMat(info[0].As<Object>());
	auto points_ = info[1].As<Array>();
	std::vector<cv::Point> points(points_.Length());
	for (uint32_t i = 0; i < points_.Length(); i++) {
		auto pt = points_.Get(i).As<Array>();
		points[i] = cv::Point(pt.Get(0U).As<Number>().Int32Value(), pt.Get(1U).As<Number>().Int32Value());
	}
	auto b = info[2].As<Number>().DoubleValue();
	auto g = info[3].As<Number>().DoubleValue();
	auto r = info[4].As<Number>().DoubleValue();
	auto lineType = info[5].As<Number>().Int32Value();
	auto shift = info[6].As<Number>().Int32Value();
	cv::fillPoly(img.mat_, points, cv::Scalar(b, g, r), lineType, shift);
	return info.Env().Undefined();
}
NODE_FUNCTION_IMPL(FillConvexPoly)
{
	auto &img = GetMat(info[0].As<Object>());
	auto points_ = info[1].As<Array>();
	std::vector<cv::Point> points(points_.Length());
	for (uint32_t i = 0; i < points_.Length(); i++) {
		auto pt = points_.Get(i).As<Array>();
		points[i] = cv::Point(pt.Get(0U).As<Number>().Int32Value(), pt.Get(1U).As<Number>().Int32Value());
	}
	auto b = info[2].As<Number>().DoubleValue();
	auto g = info[3].As<Number>().DoubleValue();
	auto r = info[4].As<Number>().DoubleValue();
	auto lineType = info[5].As<Number>().Int32Value();
	auto shift = info[6].As<Number>().Int32Value();
	cv::fillConvexPoly(img.mat_, points, cv::Scalar(b, g, r), lineType, shift);
	return info.Env().Undefined();
}
NODE_FUNCTION_IMPL(DrawMarker)
{
	auto &img = GetMat(info[0].As<Object>());
	auto x = info[1].As<Number>().Int32Value();
	auto y = info[2].As<Number>().Int32Value();
	auto b = info[3].As<Number>().DoubleValue();
	auto g = info[4].As<Number>().DoubleValue();
	auto r = info[5].As<Number>().DoubleValue();
	auto markerType = info[6].As<Number>().Int32Value();
	auto markerSize = info[7].As<Number>().Int32Value();
	auto lineType = info[8].As<Number>().Int32Value();
	auto shift = info[9].As<Number>().Int32Value();
	cv::drawMarker(img.mat_, cv::Point(x, y), cv::Scalar(b, g, r), markerType, markerSize, lineType, shift);
	return info.Env().Undefined();
}
NODE_FUNCTION_IMPL(PutText)
{
	auto &img = GetMat(info[0].As<Object>());
	auto text = info[1].As<String>().Utf8Value();
	auto x = info[2].As<Number>().Int32Value();
	auto y = info[3].As<Number>().Int32Value();
	auto fontFace = info[4].As<Number>().Int32Value();
	auto fontScale = info[5].As<Number>().DoubleValue();
	auto b = info[6].As<Number>().DoubleValue();
	auto g = info[7].As<Number>().DoubleValue();
	auto r = info[8].As<Number>().DoubleValue();
	auto thickness = info[9].As<Number>().Int32Value();
	auto lineType = info[10].As<Number>().Int32Value();
	auto shift = info[11].As<Number>().Int32Value();
	auto bottomLeftOrigin = info[12].As<Boolean>().Value();
	cv::putText(img.mat_, text, cv::Point(x, y), fontFace, fontScale, cv::Scalar(b, g, r), thickness, lineType, bottomLeftOrigin);
	return info.Env().Undefined();
}

void InitMatAPI(Napi::Env env, Napi::Object exports)
{
	CVMat::Init(env, exports);
}