mrmBot-Matrix/natives/trump.cc

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#include <Magick++.h>
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#include <napi.h>
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#include <list>
using namespace std;
using namespace Magick;
Napi::Value Trump(const Napi::CallbackInfo &info) {
Napi::Env env = info.Env();
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try {
Napi::Object obj = info[0].As<Napi::Object>();
Napi::Buffer<char> data = obj.Get("data").As<Napi::Buffer<char>>();
string type = obj.Get("type").As<Napi::String>().Utf8Value();
int delay =
obj.Has("delay") ? obj.Get("delay").As<Napi::Number>().Int32Value() : 0;
Blob blob;
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list<Image> frames;
list<Image> coalesced;
list<Image> mid;
Image watermark;
readImages(&frames, Blob(data.Data(), data.Length()));
watermark.read("./assets/images/trump.png");
coalesceImages(&coalesced, frames.begin(), frames.end());
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for (Image &image : coalesced) {
Image watermark_new = watermark;
image.virtualPixelMethod(Magick::TransparentVirtualPixelMethod);
image.backgroundColor("none");
image.scale(Geometry("365x179!"));
double arguments[16] = {0, 0, 207, 268, 365, 0, 548, 271,
365, 179, 558, 450, 0, 179, 193, 450};
image.distort(Magick::PerspectiveDistortion, 16, arguments, true);
image.extent(Geometry("800x450"), Magick::CenterGravity);
watermark_new.composite(image, Geometry("-25+134"),
Magick::DstOverCompositeOp);
watermark_new.magick(type);
watermark_new.animationDelay(delay == 0 ? image.animationDelay() : delay);
watermark_new.gifDisposeMethod(Magick::BackgroundDispose);
mid.push_back(watermark_new);
}
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optimizeTransparency(mid.begin(), mid.end());
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if (type == "gif") {
for (Image &image : mid) {
image.quantizeDitherMethod(FloydSteinbergDitherMethod);
image.quantize();
}
}
writeImages(mid.begin(), mid.end(), &blob);
Napi::Object result = Napi::Object::New(env);
result.Set("data", Napi::Buffer<char>::Copy(env, (char *)blob.data(),
blob.length()));
result.Set("type", type);
return result;
} catch (Napi::Error const &err) {
throw err;
} catch (std::exception const &err) {
throw Napi::Error::New(env, err.what());
} catch (...) {
throw Napi::Error::New(env, "Unknown error");
}
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}