59 lines
No EOL
1.6 KiB
C++
59 lines
No EOL
1.6 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 Reverse(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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bool soos =
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obj.Has("soos") ? obj.Get("soos").As<Napi::Boolean>().Value() : false;
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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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readImages(&frames, Blob(data.Data(), data.Length()));
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coalesceImages(&coalesced, frames.begin(), frames.end());
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if (soos) {
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list<Image> copy = coalesced;
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copy.reverse();
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coalesced.insert(coalesced.end(), copy.begin(), copy.end());
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} else {
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coalesced.reverse();
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}
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for_each(coalesced.begin(), coalesced.end(), magickImage("GIF"));
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optimizeTransparency(coalesced.begin(), coalesced.end());
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for (Image &image : coalesced) {
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image.quantizeDither(false);
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image.quantize();
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if (delay != 0) image.animationDelay(delay);
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}
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writeImages(coalesced.begin(), coalesced.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", "gif");
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return result;
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} catch (Napi::Error const &err) {
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throw err;
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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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} |