62 lines
1.9 KiB
C++
62 lines
1.9 KiB
C++
#include <Magick++.h>
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#include <napi.h>
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#include <list>
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using namespace std;
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using namespace Magick;
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Napi::Value Flag(const Napi::CallbackInfo &info) {
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Napi::Env env = info.Env();
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try {
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Napi::Object obj = info[0].As<Napi::Object>();
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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 =
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obj.Has("delay") ? obj.Get("delay").As<Napi::Number>().Int32Value() : 0;
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Blob blob;
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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, path);
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watermark.read(overlay);
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watermark.alphaChannel(Magick::SetAlphaChannel);
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watermark.evaluate(Magick::AlphaChannel, Magick::MultiplyEvaluateOperator,
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0.5);
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string query(to_string(frames.front().baseColumns()) + "x" +
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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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Napi::Object result = Napi::Object::New(env);
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result.Set("data", Napi::Buffer<char>::Copy(env, (char *)blob.data(),
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blob.length()));
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result.Set("type", type);
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return result;
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} catch (std::exception const &err) {
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throw Napi::Error::New(env, err.what());
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}
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} |