103 lines
3.5 KiB
C++
103 lines
3.5 KiB
C++
#include <Magick++.h>
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#include <napi.h>
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#include <iostream>
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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 Watermark(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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Napi::Buffer<char> data = obj.Get("data").As<Napi::Buffer<char>>();
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string water = obj.Get("water").As<Napi::String>().Utf8Value();
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Magick::GravityType gravity = Magick::GravityType(obj.Get("gravity").As<Napi::Number>().Int64Value());
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bool resize = obj.Has("resize")
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? obj.Get("resize").As<Napi::Boolean>().Value()
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: false;
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float yscale = obj.Has("yscale")
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? obj.Get("yscale").As<Napi::Number>().FloatValue() : false;
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bool append = obj.Has("append")
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? obj.Get("append").As<Napi::Boolean>().Value()
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: false;
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bool mc = obj.Has("mc") ? obj.Get("mc").As<Napi::Boolean>().Value() : false;
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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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try {
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readImages(&frames, Blob(data.Data(), data.Length()));
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} catch (Magick::WarningCoder &warning) {
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cerr << "Coder Warning: " << warning.what() << endl;
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} catch (Magick::Warning &warning) {
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cerr << "Warning: " << warning.what() << endl;
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}
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watermark.read(water);
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if (resize && append) {
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string query(to_string(frames.front().baseColumns()) + "x");
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watermark.scale(Geometry(query));
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} else if (resize&&yscale) {
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string query(to_string(frames.front().baseColumns())+"x"+to_string(frames.front().baseRows()*yscale)+"!");
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watermark.resize(Geometry(query));
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} else if (resize) {
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string query("x"+to_string(frames.front().baseRows()));
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watermark.scale(Geometry(query));
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}
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coalesceImages(&coalesced, frames.begin(), frames.end());
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for (Image &image : coalesced) {
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Image final;
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if (append) {
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list<Image> to_append;
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to_append.push_back(image);
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to_append.push_back(watermark);
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appendImages(&final, to_append.begin(), to_append.end(), true);
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final.repage();
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} else if (mc) {
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image.backgroundColor("white");
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image.extent(Geometry(image.columns(), image.rows() + 15));
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image.composite(watermark, gravity,
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Magick::OverCompositeOp);
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final = image;
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} else {
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image.composite(watermark, gravity,
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Magick::OverCompositeOp);
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final = image;
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}
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image.magick(type);
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final.animationDelay(delay == 0 ? image.animationDelay() : delay);
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mid.push_back(final);
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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.quantizeDitherMethod(FloydSteinbergDitherMethod);
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image.quantize();
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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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} catch (...) {
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throw Napi::Error::New(env, "Unknown error");
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}
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}
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