73 lines
No EOL
2.1 KiB
C++
73 lines
No EOL
2.1 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 Spin(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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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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readImages(&frames, Blob(data.Data(), data.Length()));
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coalesceImages(&coalesced, frames.begin(), frames.end());
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if (type != "gif") {
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list<Image>::iterator it = coalesced.begin();
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for (int i = 0; i < 29; ++i) {
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coalesced.push_back(*it);
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}
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}
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int i = 0;
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for (Image &image : coalesced) {
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image.virtualPixelMethod(Magick::TransparentVirtualPixelMethod);
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image.scale(Geometry("256x256"));
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image.alphaChannel(Magick::SetAlphaChannel);
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double rotation[1] = {360 * i / coalesced.size()};
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image.distort(Magick::ScaleRotateTranslateDistortion, 1, rotation);
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image.magick("GIF");
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mid.push_back(image);
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i++;
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}
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for_each(mid.begin(), mid.end(),
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gifDisposeMethodImage(Magick::BackgroundDispose));
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optimizeTransparency(mid.begin(), mid.end());
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if (delay != 0) {
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for_each(mid.begin(), mid.end(), animationDelayImage(delay));
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} else if (type != "gif") {
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for_each(mid.begin(), mid.end(), animationDelayImage(5));
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}
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for (Image &image : mid) {
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image.quantizeDitherMethod(FloydSteinbergDitherMethod);
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image.quantize();
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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", "gif");
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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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} |