73 lines
2.3 KiB
C++
73 lines
2.3 KiB
C++
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#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 Snapchat(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 caption = obj.Get("caption").As<Napi::String>().Utf8Value();
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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> captioned;
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Blob caption_blob;
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readImages(&frames, Blob(data.Data(), data.Length()));
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size_t width = frames.front().baseColumns();
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string query(to_string(width - ((width / 25) * 2)) + "x");
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Image caption_image(Geometry(query), Color("none"));
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caption_image.backgroundColor(Color("none"));
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caption_image.fillColor("white");
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caption_image.font("Helvetica Neue");
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caption_image.fontPointsize(width / 25);
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caption_image.textGravity(Magick::CenterGravity);
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caption_image.read("pango:" + caption);
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caption_image.backgroundColor(Color("rgba(0, 0, 0, 0.7)"));
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caption_image.extent(Geometry(width, caption_image.rows() + (width / 25)),
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Magick::CenterGravity);
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coalesceImages(&coalesced, frames.begin(), frames.end());
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for (Image &image : coalesced) {
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list<Image> images;
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image.composite(caption_image, Magick::CenterGravity,
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Magick::OverCompositeOp);
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image.magick(type);
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image.animationDelay(delay == 0 ? image.animationDelay() : delay);
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captioned.push_back(image);
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}
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optimizeTransparency(captioned.begin(), captioned.end());
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if (type == "gif") {
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for (Image &image : captioned) {
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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(captioned.begin(), captioned.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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}
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