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https://github.com/peterbraden/node-opencv.git
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121 lines
3.0 KiB
C++
Executable File
121 lines
3.0 KiB
C++
Executable File
#include "OpenCV.h"
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#include "Matrix.h"
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#include <nan.h>
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void OpenCV::Init(Local<Object> target) {
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Nan::HandleScope scope;
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// Version string.
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char out [21];
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int n = sprintf(out, "%i.%i", CV_MAJOR_VERSION, CV_MINOR_VERSION);
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target->Set(Nan::New<String>("version").ToLocalChecked(), Nan::New<String>(out, n).ToLocalChecked());
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Nan::SetMethod(target, "readImage", ReadImage);
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Nan::SetMethod(target, "readImageMulti", ReadImageMulti);
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}
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NAN_METHOD(OpenCV::ReadImage) {
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Nan::EscapableHandleScope scope;
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REQ_FUN_ARG(1, cb);
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Local<Value> argv[2];
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argv[0] = Nan::Null();
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Local<Object> im_h = Nan::NewInstance(Nan::GetFunction(Nan::New(Matrix::constructor)).ToLocalChecked()).ToLocalChecked();
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Matrix *img = Nan::ObjectWrap::Unwrap<Matrix>(im_h);
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argv[1] = im_h;
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try {
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cv::Mat mat;
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if (info[0]->IsNumber() && info[1]->IsNumber()) {
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int width, height;
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width = info[0]->Uint32Value();
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height = info[1]->Uint32Value();
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mat = *(new cv::Mat(width, height, CV_64FC1));
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} else if (info[0]->IsString()) {
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std::string filename = std::string(*Nan::Utf8String(info[0]->ToString()));
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mat = cv::imread(filename, CV_LOAD_IMAGE_UNCHANGED);
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} else if (Buffer::HasInstance(info[0])) {
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uint8_t *buf = (uint8_t *) Buffer::Data(info[0]->ToObject());
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unsigned len = Buffer::Length(info[0]->ToObject());
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cv::Mat *mbuf = new cv::Mat(len, 1, CV_64FC1, buf);
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mat = cv::imdecode(*mbuf, CV_LOAD_IMAGE_UNCHANGED);
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if (mat.empty()) {
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argv[0] = Nan::Error("Error loading file");
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}
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}
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img->mat = mat;
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} catch (cv::Exception& e) {
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argv[0] = Nan::Error(e.what());
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argv[1] = Nan::Null();
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}
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Nan::TryCatch try_catch;
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cb->Call(Nan::GetCurrentContext()->Global(), 2, argv);
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if (try_catch.HasCaught()) {
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Nan::FatalException(try_catch);
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}
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return;
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}
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#if CV_MAJOR_VERSION >= 3
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NAN_METHOD(OpenCV::ReadImageMulti) {
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Nan::EscapableHandleScope scope;
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REQ_FUN_ARG(1, cb);
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Local<Value> argv[2];
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argv[0] = Nan::Null();
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std::vector<cv::Mat> mats;
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try {
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if (info[0]->IsString()) {
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std::string filename = std::string(*Nan::Utf8String(info[0]->ToString()));
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cv::imreadmulti(filename, mats);
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if (mats.empty()) {
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argv[0] = Nan::Error("Error loading file");
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}
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}
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} catch (cv::Exception& e) {
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argv[0] = Nan::Error(e.what());
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argv[1] = Nan::Null();
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}
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Local <Array> output = Nan::New<Array>(mats.size());
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argv[1] = output;
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for (std::vector<cv::Mat>::size_type i = 0; i < mats.size(); i ++) {
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Local<Object> im_h = Nan::NewInstance(Nan::GetFunction(Nan::New(Matrix::constructor)).ToLocalChecked()).ToLocalChecked();
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Matrix *img = Nan::ObjectWrap::Unwrap<Matrix>(im_h);
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img->mat = mats[i];
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output->Set(i, im_h);
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}
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Nan::TryCatch try_catch;
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cb->Call(Nan::GetCurrentContext()->Global(), 2, argv);
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if (try_catch.HasCaught()) {
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Nan::FatalException(try_catch);
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}
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return;
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}
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#else
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NAN_METHOD(OpenCV::ReadImageMulti) {
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info.GetReturnValue().Set(Nan::New<Boolean>(false));
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return;
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}
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#endif
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