mrmBot-Matrix/natives/resize.cc

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#include <Magick++.h>
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#include <napi.h>
#include <iostream>
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#include <list>
using namespace std;
using namespace Magick;
Napi::Value Resize(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 stretch = obj.Has("stretch")
? obj.Get("stretch").As<Napi::Boolean>().Value()
: false;
bool wide =
obj.Has("wide") ? obj.Get("wide").As<Napi::Boolean>().Value() : false;
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> 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) {
if (stretch) {
image.resize(Geometry("512x512!"));
} else if (wide) {
image.resize(Geometry(to_string((image.baseColumns() * 19) / 2) + "x" +
to_string(image.baseRows() / 2) + "!"));
} else {
image.scale(Geometry("10%"));
image.scale(Geometry("1000%"));
}
image.magick(type);
blurred.push_back(image);
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}
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optimizeTransparency(blurred.begin(), blurred.end());
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if (type == "gif") {
for (Image &image : blurred) {
image.quantizeDitherMethod(FloydSteinbergDitherMethod);
image.quantize();
if (delay != 0) image.animationDelay(delay);
}
}
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writeImages(blurred.begin(), blurred.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 (std::exception const &err) {
throw Napi::Error::New(env, err.what());
} catch (...) {
throw Napi::Error::New(env, "Unknown error");
}
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}