mrmBot-Matrix/natives/magik.cc

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#include <Magick++.h>
#include <napi.h>
#include <iostream>
#include <list>
using namespace std;
using namespace Magick;
Napi::Value Magik(const Napi::CallbackInfo &info) {
Napi::Env env = info.Env();
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Napi::Object result = Napi::Object::New(env);
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try {
Napi::Object obj = info[1].As<Napi::Object>();
Napi::Buffer<char> data = obj.Get("data").As<Napi::Buffer<char>>();
string type = obj.Get("type").As<Napi::String>().Utf8Value();
Blob blob;
list<Image> frames;
list<Image> coalesced;
list<Image> blurred;
try {
readImages(&frames, Blob(data.Data(), data.Length()));
} catch (Magick::WarningCoder &warning) {
cerr << "Coder Warning: " << warning.what() << endl;
} catch (Magick::Warning &warning) {
cerr << "Warning: " << warning.what() << endl;
}
coalesceImages(&coalesced, frames.begin(), frames.end());
for (Image &image : coalesced) {
image.scale(Geometry("350x350"));
image.liquidRescale(Geometry("175x175"));
image.liquidRescale(Geometry("350x350"));
image.magick(type);
blurred.push_back(image);
}
optimizeTransparency(blurred.begin(), blurred.end());
if (type == "gif") {
for (Image &image : blurred) {
image.quantizeDitherMethod(FloydSteinbergDitherMethod);
image.quantize();
}
}
writeImages(blurred.begin(), blurred.end(), &blob);
result.Set("data", Napi::Buffer<char>::Copy(env, (char *)blob.data(),
blob.length()));
result.Set("type", type);
} catch (std::exception const &err) {
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Napi::Error::New(env, err.what()).ThrowAsJavaScriptException();
} catch (...) {
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Napi::Error::New(env, "Unknown error").ThrowAsJavaScriptException();
}
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return result;
}