#include #include #include #include using namespace std; using namespace Magick; Napi::Value Snapchat(const Napi::CallbackInfo &info) { Napi::Env env = info.Env(); try { Napi::Object obj = info[0].As(); Napi::Buffer data = obj.Get("data").As>(); string caption = obj.Get("caption").As().Utf8Value(); float pos = obj.Has("pos") ? obj.Get("pos").As().FloatValue() : 0.5; string type = obj.Get("type").As().Utf8Value(); int delay = obj.Has("delay") ? obj.Get("delay").As().Int32Value() : 0; Blob blob; list frames; list coalesced; list captioned; Blob caption_blob; try { readImages(&frames, Blob(data.Data(), data.Length())); } catch (Magick::WarningCoder &warning) { cerr << "Coder Warning: " << warning.what() << endl; } catch (Magick::Warning &warning) { cerr << "Warning: " << warning.what() << endl; } size_t width = frames.front().baseColumns(); size_t height = frames.front().baseRows(); string query(to_string(width - ((width / 25) * 2)) + "x"); Image caption_image(Geometry(query), Color("none")); caption_image.backgroundColor(Color("none")); caption_image.fillColor("white"); caption_image.font("Helvetica Neue"); caption_image.fontPointsize(width / 25); caption_image.textGravity(Magick::CenterGravity); caption_image.read("pango:" + caption); caption_image.backgroundColor(Color("rgba(0, 0, 0, 0.7)")); caption_image.extent(Geometry(width, caption_image.rows() + (width / 25)), Magick::CenterGravity); coalesceImages(&coalesced, frames.begin(), frames.end()); for (Image &image : coalesced) { list images; image.composite(caption_image, 0, height * pos, Magick::OverCompositeOp); image.magick(type); image.animationDelay(delay == 0 ? image.animationDelay() : delay); captioned.push_back(image); } optimizeTransparency(captioned.begin(), captioned.end()); if (type == "gif") { for (Image &image : captioned) { image.quantizeDither(false); image.quantize(); } } writeImages(captioned.begin(), captioned.end(), &blob); Napi::Object result = Napi::Object::New(env); result.Set("data", Napi::Buffer::Copy(env, (char *)blob.data(), blob.length())); result.Set("type", type); return result; } catch (std::exception const &err) { throw Napi::Error::New(env, err.what()); } catch (...) { throw Napi::Error::New(env, "Unknown error"); } }