mrmBot-Matrix/natives/togif.cc

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#include <napi.h>
#include <vips/vips8>
using namespace std;
using namespace vips;
Napi::Value ToGif(const Napi::CallbackInfo &info) {
Napi::Env env = info.Env();
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Napi::Object result = Napi::Object::New(env);
try {
Napi::Object obj = info[1].As<Napi::Object>();
Napi::Buffer<char> data = obj.Get("data").As<Napi::Buffer<char>>();
string type = obj.Get("type").As<Napi::String>().Utf8Value();
if (type == "gif") {
result.Set("data", data);
result.Set("type", "gif");
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} else {
VOption *options = VImage::option()->set("access", "sequential");
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VImage in = VImage::new_from_buffer(data.Data(), data.Length(), "",
type == "webp" ? options->set("n", -1)
: options);
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void *buf;
size_t length;
in.write_to_buffer(".gif", &buf, &length);
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result.Set("data", Napi::Buffer<char>::Copy(env, (char *)buf, length));
result.Set("type", "gif");
}
} catch (std::exception const &err) {
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Napi::Error::New(env, err.what()).ThrowAsJavaScriptException();
} catch (...) {
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Napi::Error::New(env, "Unknown error").ThrowAsJavaScriptException();
}
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vips_error_clear();
vips_thread_shutdown();
return result;
}