mrmBot-Matrix/natives/speed.cc

93 lines
No EOL
2.9 KiB
C++

#include <napi.h>
#include <list>
#include <Magick++.h>
using namespace std;
using namespace Magick;
class SpeedWorker : public Napi::AsyncWorker {
public:
SpeedWorker(Napi::Function& callback, string in_path, bool slow, int speed, string type, int delay)
: Napi::AsyncWorker(callback), in_path(in_path), slow(slow), speed(speed), type(type), delay(delay) {}
~SpeedWorker() {}
void Execute() {
list <Image> frames;
readImages(&frames, in_path);
// if passed a delay, use that. otherwise use the average frame delay.
if (delay == 0) {
vector<int> old_delays;
bool removeFrames = false;
for (Image &image : frames) {
int animation_delay = image.animationDelay();
old_delays.push_back(animation_delay);
}
for (Image &image : frames) {
int old_delay = image.animationDelay();
int new_delay = slow ? old_delay * speed : old_delay / speed;
if (!slow && new_delay <= 1) {
removeFrames = true;
break;
}
image.animationDelay(new_delay);
}
if (removeFrames) {
for (list <Image>::iterator i = frames.begin(); i != frames.end(); ++i) {
int index = distance(frames.begin(), i);
i->animationDelay(old_delays[index]);
}
for (int i = 0; i < speed - 1; ++i) {
frames.remove_if([counter = 0](const auto x) mutable {
return ++counter % 2 == 0;
});
}
}
} else {
int new_delay = slow ? delay * speed : delay / speed;
if (!slow && new_delay <= 1) {
for (int i = 0; i < speed - 1; ++i) {
frames.remove_if([counter = 0](const auto x) mutable {
return ++counter % 2 == 0;
});
}
} else {
for_each(frames.begin(), frames.end(), animationDelayImage(new_delay));
}
}
for_each(frames.begin(), frames.end(), magickImage(type));
writeImages(frames.begin(), frames.end(), &blob);
}
void OnOK() {
Callback().Call({Env().Undefined(), Napi::Buffer<char>::Copy(Env(), (char *)blob.data(), blob.length()), Napi::String::From(Env(), type)});
}
private:
bool slow;
string in_path, type;
int speed, delay;
Blob blob;
};
Napi::Value Speed(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 slow = obj.Has("slow") ? obj.Get("slow").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;
int speed = obj.Has("speed") ? obj.Get("speed").As<Napi::Number>().Int32Value() : 2;
SpeedWorker* explodeWorker = new SpeedWorker(cb, path, slow, speed, type, delay);
explodeWorker->Queue();
return env.Undefined();
}