74 lines
2.3 KiB
C++
74 lines
2.3 KiB
C++
#include <Magick++.h>
|
|
#include <napi.h>
|
|
|
|
#include <list>
|
|
|
|
using namespace std;
|
|
using namespace Magick;
|
|
|
|
Napi::Value Caption(const Napi::CallbackInfo &info) {
|
|
Napi::Env env = info.Env();
|
|
|
|
try {
|
|
Napi::Object obj = info[0].As<Napi::Object>();
|
|
string path = obj.Get("path").As<Napi::String>().Utf8Value();
|
|
string caption = obj.Get("caption").As<Napi::String>().Utf8Value();
|
|
string type = obj.Get("type").As<Napi::String>().Utf8Value();
|
|
int delay =
|
|
obj.Has("delay") ? obj.Get("delay").As<Napi::Number>().Int32Value() : 0;
|
|
|
|
Blob blob;
|
|
|
|
list<Image> frames;
|
|
list<Image> coalesced;
|
|
list<Image> captioned;
|
|
readImages(&frames, path);
|
|
|
|
size_t width = frames.front().baseColumns();
|
|
string query(to_string(width - ((width / 25) * 2)) + "x");
|
|
Image caption_image(Geometry(query), Color("white"));
|
|
caption_image.fillColor("black");
|
|
caption_image.alpha(true);
|
|
caption_image.font("Futura");
|
|
caption_image.fontPointsize(width / 13);
|
|
caption_image.textGravity(Magick::CenterGravity);
|
|
caption_image.read("pango:" + caption);
|
|
caption_image.extent(Geometry(width, caption_image.rows() + (width / 13)),
|
|
Magick::CenterGravity);
|
|
|
|
coalesceImages(&coalesced, frames.begin(), frames.end());
|
|
|
|
for (Image &image : coalesced) {
|
|
Image appended;
|
|
list<Image> images;
|
|
image.backgroundColor("white");
|
|
images.push_back(caption_image);
|
|
images.push_back(image);
|
|
appendImages(&appended, images.begin(), images.end(), true);
|
|
appended.repage();
|
|
appended.magick(type);
|
|
appended.animationDelay(delay == 0 ? image.animationDelay() : delay);
|
|
appended.gifDisposeMethod(Magick::BackgroundDispose);
|
|
captioned.push_back(appended);
|
|
}
|
|
|
|
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<char>::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());
|
|
}
|
|
} |