mrmBot-Matrix/natives/colors.cc

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#include <Magick++.h>
#include <napi.h>
#include <iostream>
#include <list>
using namespace std;
using namespace Magick;
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Napi::Value Colors(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>>();
bool old =
obj.Has("old") ? obj.Get("old").As<Napi::Boolean>().Value() : false;
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string color = obj.Get("color").As<Napi::String>().Utf8Value();
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;
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list<Image> colored;
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) {
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if (color == "blurple") {
image.threshold(49151.25);
image.levelColors(old ? "#7289DA" : "#5865F2", "white");
} else if (color == "grayscale") {
image.quantizeColorSpace(GRAYColorspace);
image.quantizeColors(256);
} else if (color == "sepia") {
image.sepiaTone(49151.25);
}
image.magick(type);
image.animationDelay(delay == 0 ? image.animationDelay() : delay);
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colored.push_back(image);
}
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optimizeTransparency(colored.begin(), colored.end());
if (type == "gif") {
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for (Image &image : colored) {
image.quantizeDitherMethod(FloydSteinbergDitherMethod);
image.quantize();
}
}
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writeImages(colored.begin(), colored.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 (std::exception const &err) {
throw Napi::Error::New(env, err.what());
} catch (...) {
throw Napi::Error::New(env, "Unknown error");
}
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}