mrmBot-Matrix/natives/mirror.cc

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#include <napi.h>
#include <list>
#include <Magick++.h>
using namespace std;
using namespace Magick;
class MirrorWorker : public Napi::AsyncWorker {
public:
MirrorWorker(Napi::Function& callback, string in_path, bool vertical, bool first, string type, int delay)
: Napi::AsyncWorker(callback), in_path(in_path), vertical(vertical), first(first), type(type), delay(delay) {}
~MirrorWorker() {}
void Execute() {
list <Image> frames;
list <Image> coalesced;
list <Image> mid;
MagickCore::GravityType gravity;
readImages(&frames, in_path);
coalesceImages(&coalesced, frames.begin(), frames.end());
if (vertical && first) {
gravity = Magick::NorthGravity;
} else if (!vertical && first) {
gravity = Magick::WestGravity;
} else if (vertical && !first) {
gravity = Magick::SouthGravity;
} else {
gravity = Magick::EastGravity;
}
for (Image &image : coalesced) {
list <Image> mirrored;
Image final;
image.extent(Geometry(to_string(vertical ? image.baseColumns() : image.baseColumns() / 2) + "x" + to_string(vertical ? image.baseRows() / 2 : image.baseRows())), gravity);
mirrored.push_back(image);
Image mirror = image;
if (vertical) {
mirror.flip();
} else {
mirror.flop();
}
if (first) {
mirrored.push_back(mirror);
} else {
mirrored.push_front(mirror);
}
appendImages(&final, mirrored.begin(), mirrored.end(), vertical);
final.repage();
final.magick(type);
final.animationDelay(delay == 0 ? image.animationDelay() : delay);
mid.push_back(final);
}
optimizeTransparency(mid.begin(), mid.end());
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if (type == "gif") {
for (Image &image : mid) {
image.quantizeDither(false);
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, type;
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int delay;
bool vertical, first;
Blob blob;
};
Napi::Value Mirror(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();
bool vertical = obj.Has("vertical") ? obj.Get("vertical").As<Napi::Boolean>().Value() : false;
bool first = obj.Has("first") ? obj.Get("first").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;
MirrorWorker* mirrorWorker = new MirrorWorker(cb, path, vertical, first, type, delay);
mirrorWorker->Queue();
return env.Undefined();
}