84 lines
2.5 KiB
C++
84 lines
2.5 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 Speed(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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bool slow =
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obj.Has("slow") ? obj.Get("slow").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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int speed =
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obj.Has("speed") ? obj.Get("speed").As<Napi::Number>().Int32Value() : 2;
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Blob blob;
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list<Image> frames;
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readImages(&frames, path);
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// if passed a delay, use that. otherwise use the average frame delay.
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if (delay == 0) {
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vector<int> old_delays;
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bool removeFrames = false;
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for (Image &image : frames) {
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int animation_delay = image.animationDelay();
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old_delays.push_back(animation_delay);
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}
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for (Image &image : frames) {
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int old_delay = image.animationDelay();
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int new_delay = slow ? old_delay * speed : old_delay / speed;
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if (!slow && new_delay <= 1) {
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removeFrames = true;
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break;
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}
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image.animationDelay(new_delay);
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}
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if (removeFrames) {
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for (list<Image>::iterator i = frames.begin(); i != frames.end(); ++i) {
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int index = distance(frames.begin(), i);
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i->animationDelay(old_delays[index]);
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}
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for (int i = 0; i < speed - 1; ++i) {
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frames.remove_if([counter = 0](const auto x) mutable {
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return ++counter % 2 == 0;
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});
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}
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}
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} else {
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int new_delay = slow ? delay * speed : delay / speed;
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if (!slow && new_delay <= 1) {
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for (int i = 0; i < speed - 1; ++i) {
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frames.remove_if([counter = 0](const auto x) mutable {
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return ++counter % 2 == 0;
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});
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}
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} else {
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for_each(frames.begin(), frames.end(), animationDelayImage(new_delay));
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}
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}
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for_each(frames.begin(), frames.end(), magickImage(type));
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writeImages(frames.begin(), frames.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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} |