70 lines
2.1 KiB
C++
70 lines
2.1 KiB
C++
#include <napi.h>
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#include <list>
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#include <Magick++.h>
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using namespace std;
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using namespace Magick;
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class FlagWorker : public Napi::AsyncWorker {
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public:
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FlagWorker(Napi::Function& callback, string in_path, string overlay_path, string type, int delay)
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: Napi::AsyncWorker(callback), in_path(in_path), overlay_path(overlay_path), type(type), delay(delay) {}
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~FlagWorker() {}
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void Execute() {
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list <Image> frames;
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list <Image> coalesced;
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list <Image> mid;
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Image watermark;
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readImages(&frames, in_path);
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watermark.read(overlay_path);
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watermark.alphaChannel(Magick::SetAlphaChannel);
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watermark.evaluate(Magick::AlphaChannel, Magick::MultiplyEvaluateOperator, 0.5);
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string query(to_string(frames.front().baseColumns()) + "x" + to_string(frames.front().baseRows()) + "!");
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watermark.scale(Geometry(query));
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coalesceImages(&coalesced, frames.begin(), frames.end());
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for (Image &image : coalesced) {
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image.composite(watermark, Magick::NorthGravity, Magick::OverCompositeOp);
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image.magick(type);
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mid.push_back(image);
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}
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optimizeTransparency(mid.begin(), mid.end());
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if (type == "gif") {
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for (Image &image : mid) {
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image.quantizeDither(false);
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image.quantize();
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if (delay != 0) image.animationDelay(delay);
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}
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}
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writeImages(mid.begin(), mid.end(), &blob);
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}
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void OnOK() {
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Callback().Call({Env().Undefined(), Napi::Buffer<char>::Copy(Env(), (char *)blob.data(), blob.length())});
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}
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private:
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string in_path, overlay_path, type;
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int delay;
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Blob blob;
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};
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Napi::Value Flag(const Napi::CallbackInfo &info)
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{
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Napi::Env env = info.Env();
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Napi::Object obj = info[0].As<Napi::Object>();
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Napi::Function cb = info[1].As<Napi::Function>();
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string path = obj.Get("path").As<Napi::String>().Utf8Value();
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string overlay = obj.Get("overlay").As<Napi::String>().Utf8Value();
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string type = obj.Get("type").As<Napi::String>().Utf8Value();
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int delay = obj.Has("delay") ? obj.Get("delay").As<Napi::Number>().Int32Value() : 0;
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FlagWorker* flagWorker = new FlagWorker(cb, path, overlay, type, delay);
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flagWorker->Queue();
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return env.Undefined();
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} |