mrmBot-Matrix/natives/tile.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 Tile(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;
list<Image> frames;
list<Image> coalesced;
list<Image> mid;
readImages(&frames, Blob(data.Data(), data.Length()));
coalesceImages(&coalesced, frames.begin(), frames.end());
for (Image &image : coalesced) {
list<Image> duplicated;
Image appended;
list<Image> montage;
Image frame;
image.magick(type);
for (int i = 0; i < 5; ++i) {
duplicated.push_back(image);
}
appendImages(&appended, duplicated.begin(), duplicated.end());
appended.repage();
for (int i = 0; i < 5; ++i) {
montage.push_back(appended);
}
appendImages(&frame, montage.begin(), montage.end(), true);
frame.repage();
frame.scale(Geometry("800x800>"));
frame.animationDelay(delay == 0 ? image.animationDelay() : delay);
mid.push_back(frame);
}
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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();
}
}
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writeImages(mid.begin(), mid.end(), &blob);
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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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}