75 lines
2.3 KiB
C++
75 lines
2.3 KiB
C++
#include <napi.h>
|
|
|
|
#include <vips/vips8>
|
|
|
|
using namespace std;
|
|
using namespace vips;
|
|
|
|
Napi::Value Jpeg(const Napi::CallbackInfo &info) {
|
|
Napi::Env env = info.Env();
|
|
|
|
try {
|
|
Napi::Object obj = info[0].As<Napi::Object>();
|
|
Napi::Buffer<char> data = obj.Get("data").As<Napi::Buffer<char>>();
|
|
int quality = obj.Has("quality")
|
|
? obj.Get("quality").As<Napi::Number>().Int32Value()
|
|
: 0;
|
|
string type = obj.Get("type").As<Napi::String>().Utf8Value();
|
|
int delay =
|
|
obj.Has("delay") ? obj.Get("delay").As<Napi::Number>().Int32Value() : 0;
|
|
|
|
Napi::Object result = Napi::Object::New(env);
|
|
|
|
if (type == "gif") {
|
|
VImage in =
|
|
VImage::new_from_buffer(
|
|
data.Data(), data.Length(), "",
|
|
VImage::option()->set("access", "sequential")->set("n", -1))
|
|
.colourspace(VIPS_INTERPRETATION_sRGB);
|
|
if (!in.has_alpha()) in = in.bandjoin(255);
|
|
|
|
int page_height = vips_image_get_page_height(in.get_image());
|
|
|
|
void *jpgBuf;
|
|
size_t jpgLength;
|
|
in.write_to_buffer(
|
|
".jpg", &jpgBuf, &jpgLength,
|
|
VImage::option()->set("Q", quality)->set("strip", true));
|
|
VImage final = VImage::new_from_buffer(jpgBuf, jpgLength, "");
|
|
final.set(VIPS_META_PAGE_HEIGHT, page_height);
|
|
if (delay) {
|
|
final.set("delay", delay);
|
|
} else if (type == "gif") {
|
|
final.set("delay", in.get_array_int("delay"));
|
|
}
|
|
|
|
void *buf;
|
|
size_t length;
|
|
final.write_to_buffer(("." + type).c_str(), &buf, &length,
|
|
VImage::option()->set("dither", 0));
|
|
|
|
vips_thread_shutdown();
|
|
|
|
result.Set("data", Napi::Buffer<char>::Copy(env, (char *)buf, length));
|
|
result.Set("type", type);
|
|
} else {
|
|
VImage in = VImage::new_from_buffer(data.Data(), data.Length(), "");
|
|
void *buf;
|
|
size_t length;
|
|
in.write_to_buffer(
|
|
".jpg", &buf, &length,
|
|
VImage::option()->set("Q", quality)->set("strip", true));
|
|
|
|
vips_thread_shutdown();
|
|
|
|
result.Set("data", Napi::Buffer<char>::Copy(env, (char *)buf, length));
|
|
result.Set("type", "jpg");
|
|
}
|
|
|
|
return result;
|
|
} catch (std::exception const &err) {
|
|
throw Napi::Error::New(env, err.what());
|
|
} catch (...) {
|
|
throw Napi::Error::New(env, "Unknown error");
|
|
}
|
|
}
|