mrmBot-Matrix/natives/invert.cc

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#include <napi.h>
#include <list>
#include <Magick++.h>
using namespace std;
using namespace Magick;
class InvertWorker : public Napi::AsyncWorker {
public:
InvertWorker(Napi::Function& callback, string in_path, string type, int delay)
: Napi::AsyncWorker(callback), in_path(in_path), type(type), delay(delay) {}
~InvertWorker() {}
void Execute() {
list<Image> frames;
list<Image> coalesced;
list<Image> inverted;
list<Image> result;
readImages(&frames, in_path);
coalesceImages(&coalesced, frames.begin(), frames.end());
for (Image &image : coalesced) {
image.negateChannel(Magick::ChannelType(Magick::CompositeChannels ^ Magick::AlphaChannel));
image.magick(type);
inverted.push_back(image);
}
optimizeImageLayers(&result, inverted.begin(), inverted.end());
if (delay != 0) for_each(result.begin(), result.end(), animationDelayImage(delay));
writeImages(result.begin(), result.end(), &blob);
}
void OnOK() {
Callback().Call({Env().Undefined(), Napi::Buffer<char>::Copy(Env(), (char *)blob.data(), blob.length())});
}
private:
string in_path, type;
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int delay;
Blob blob;
};
Napi::Value Invert(const Napi::CallbackInfo &info)
{
Napi::Env env = info.Env();
string in_path = info[0].As<Napi::String>().Utf8Value();
string type = info[1].As<Napi::String>().Utf8Value();
int delay = info[2].As<Napi::Number>().Int32Value();
Napi::Function cb = info[3].As<Napi::Function>();
InvertWorker* invertWorker = new InvertWorker(cb, in_path, type, delay);
invertWorker->Queue();
return env.Undefined();
}