85 lines
No EOL
2.7 KiB
C++
85 lines
No EOL
2.7 KiB
C++
#include <napi.h>
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#include <list>
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#include <Magick++.h>
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using namespace std;
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using namespace Magick;
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class CaptionWorker : public Napi::AsyncWorker {
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public:
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CaptionWorker(Napi::Function& callback, string caption, string in_path, string type, int delay)
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: Napi::AsyncWorker(callback), caption(caption), in_path(in_path), type(type), delay(delay) {}
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~CaptionWorker() {}
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void Execute() {
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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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list <Image> result;
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readImages(&frames, in_path);
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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("white"));
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caption_image.fillColor("black");
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caption_image.alpha(true);
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caption_image.font("Futura");
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caption_image.fontPointsize(width / 13);
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caption_image.textGravity(Magick::CenterGravity);
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caption_image.read("pango:" + caption);
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caption_image.extent(Geometry(width, caption_image.rows() + (width / 13)), Magick::CenterGravity);
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coalesceImages(&coalesced, frames.begin(), frames.end());
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for (Image &image : coalesced) {
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Image appended;
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list <Image> images;
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image.backgroundColor("white");
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images.push_back(caption_image);
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images.push_back(image);
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appendImages(&appended, images.begin(), images.end(), true);
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appended.repage();
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appended.magick(type);
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appended.animationDelay(delay == 0 ? image.animationDelay() : delay);
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appended.gifDisposeMethod(Magick::BackgroundDispose);
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captioned.push_back(appended);
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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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}
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void OnOK() {
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Callback().Call({Env().Undefined(), Napi::Buffer<char>::Copy(Env(), (char *)blob.data(), blob.length())});
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}
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private:
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string caption, in_path, type;
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int delay;
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Blob blob;
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};
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Napi::Value Caption(const Napi::CallbackInfo &info)
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{
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Napi::Env env = info.Env();
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Napi::Object obj = info[0].As<Napi::Object>();
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Napi::Function cb = info[1].As<Napi::Function>();
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string path = obj.Get("path").As<Napi::String>().Utf8Value();
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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 = obj.Has("delay") ? obj.Get("delay").As<Napi::Number>().Int32Value() : 0;
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CaptionWorker* captionWorker = new CaptionWorker(cb, caption, path, type, delay);
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captionWorker->Queue();
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return env.Undefined();
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} |