mrmBot-Matrix/natives/watermark.cc
2021-02-25 15:31:10 -06:00

94 lines
No EOL
3.2 KiB
C++

#include <napi.h>
#include <list>
#include <iostream>
#include <Magick++.h>
using namespace std;
using namespace Magick;
class WatermarkWorker : public Napi::AsyncWorker {
public:
WatermarkWorker(Napi::Function& callback, string in_path, string water_path, int gravity, string type, int delay, bool resize, bool append, bool mc)
: Napi::AsyncWorker(callback), in_path(in_path), water_path(water_path), gravity(gravity), type(type), delay(delay), resize(resize), append(append), mc(mc) {}
~WatermarkWorker() {}
void Execute() {
list <Image> frames;
list <Image> coalesced;
list <Image> mid;
Image watermark;
readImages(&frames, in_path);
watermark.read(water_path);
if (resize && append) {
string query(to_string(frames.front().baseColumns()) + "x");
watermark.scale(Geometry(query));
} else if (resize) {
string query("x" + to_string(frames.front().baseRows()));
watermark.scale(Geometry(query));
}
coalesceImages(&coalesced, frames.begin(), frames.end());
for (Image &image : coalesced) {
Image final;
if (append) {
list <Image> to_append;
to_append.push_back(image);
to_append.push_back(watermark);
appendImages(&final, to_append.begin(), to_append.end(), true);
final.repage();
} else if (mc) {
image.backgroundColor("white");
image.extent(Geometry(image.columns(), image.rows() + 15));
image.composite(watermark, Magick::GravityType(gravity), Magick::OverCompositeOp);
final = image;
} else {
image.composite(watermark, Magick::GravityType(gravity), Magick::OverCompositeOp);
final = image;
}
image.magick(type);
final.animationDelay(delay == 0 ? image.animationDelay() : delay);
mid.push_back(final);
}
optimizeTransparency(mid.begin(), mid.end());
if (type == "gif") {
for (Image &image : mid) {
image.quantizeDitherMethod(FloydSteinbergDitherMethod);
image.quantize();
}
}
writeImages(mid.begin(), mid.end(), &blob);
}
void OnOK() {
Callback().Call({Env().Undefined(), Napi::Buffer<char>::Copy(Env(), (char *)blob.data(), blob.length())});
}
private:
string in_path, water_path, type;
int delay, gravity;
Blob blob;
bool resize, append, mc;
};
Napi::Value Watermark(const Napi::CallbackInfo &info)
{
Napi::Env env = info.Env();
Napi::Object obj = info[0].As<Napi::Object>();
Napi::Function cb = info[1].As<Napi::Function>();
string path = obj.Get("path").As<Napi::String>().Utf8Value();
string water = obj.Get("water").As<Napi::String>().Utf8Value();
int gravity = obj.Get("gravity").As<Napi::Number>().Int32Value();
bool resize = obj.Has("resize") ? obj.Get("resize").As<Napi::Boolean>().Value() : false;
bool append = obj.Has("append") ? obj.Get("append").As<Napi::Boolean>().Value() : false;
bool mc = obj.Has("mc") ? obj.Get("mc").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;
WatermarkWorker* watermarkWorker = new WatermarkWorker(cb, path, water, gravity, type, delay, resize, append, mc);
watermarkWorker->Queue();
return env.Undefined();
}