99 lines
3.0 KiB
C++
99 lines
3.0 KiB
C++
#include <Magick++.h>
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#include <napi.h>
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#include <iostream>
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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 Mirror(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 vertical = obj.Has("vertical")
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? obj.Get("vertical").As<Napi::Boolean>().Value()
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: false;
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bool first =
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obj.Has("first") ? obj.Get("first").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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Blob blob;
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list<Image> frames;
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list<Image> coalesced;
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list<Image> mid;
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MagickCore::GravityType gravity;
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try {
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readImages(&frames, Blob(data.Data(), data.Length()));
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} catch (Magick::WarningCoder &warning) {
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cerr << "Coder Warning: " << warning.what() << endl;
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} catch (Magick::Warning &warning) {
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cerr << "Warning: " << warning.what() << endl;
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}
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coalesceImages(&coalesced, frames.begin(), frames.end());
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if (vertical && first) {
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gravity = Magick::NorthGravity;
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} else if (!vertical && first) {
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gravity = Magick::WestGravity;
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} else if (vertical && !first) {
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gravity = Magick::SouthGravity;
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} else {
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gravity = Magick::EastGravity;
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}
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for (Image &image : coalesced) {
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list<Image> mirrored;
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Image final;
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image.extent(Geometry(to_string(vertical ? image.baseColumns()
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: image.baseColumns() / 2) +
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"x" +
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to_string(vertical ? image.baseRows() / 2
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: image.baseRows())),
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gravity);
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mirrored.push_back(image);
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Image mirror = image;
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if (vertical) {
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mirror.flip();
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} else {
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mirror.flop();
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}
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if (first) {
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mirrored.push_back(mirror);
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} else {
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mirrored.push_front(mirror);
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}
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appendImages(&final, mirrored.begin(), mirrored.end(), vertical);
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final.repage();
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final.magick(type);
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final.animationDelay(delay == 0 ? image.animationDelay() : delay);
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mid.push_back(final);
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}
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optimizeTransparency(mid.begin(), mid.end());
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if (type == "gif") {
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for (Image &image : mid) {
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image.quantizeDither(false);
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image.quantize();
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}
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}
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writeImages(mid.begin(), mid.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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} catch (...) {
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throw Napi::Error::New(env, "Unknown error");
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}
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} |