65 lines
No EOL
2.3 KiB
C++
65 lines
No EOL
2.3 KiB
C++
#include <napi.h>
|
|
|
|
#include <vips/vips8>
|
|
|
|
using namespace std;
|
|
using namespace vips;
|
|
|
|
Napi::Value Gamexplain(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>>();
|
|
string type = obj.Get("type").As<Napi::String>().Utf8Value();
|
|
string basePath = obj.Get("basePath").As<Napi::String>().Utf8Value();
|
|
|
|
VOption *options = VImage::option()->set("access", "sequential");
|
|
|
|
VImage in =
|
|
VImage::new_from_buffer(data.Data(), data.Length(), "",
|
|
type == "gif" ? options->set("n", -1) : options)
|
|
.colourspace(VIPS_INTERPRETATION_sRGB);
|
|
if (!in.has_alpha()) in = in.bandjoin(255);
|
|
|
|
string assetPath = basePath + "assets/images/gamexplain.png";
|
|
VImage tmpl = VImage::new_from_file(assetPath.c_str());
|
|
|
|
int width = in.width();
|
|
int pageHeight = vips_image_get_page_height(in.get_image());
|
|
int nPages = vips_image_get_n_pages(in.get_image());
|
|
|
|
vector<VImage> img;
|
|
for (int i = 0; i < nPages; i++) {
|
|
VImage img_frame =
|
|
type == "gif" ? in.crop(0, i * pageHeight, width, pageHeight) : in;
|
|
VImage resized = img_frame
|
|
.resize(1181.0 / (double)width,
|
|
VImage::option()->set(
|
|
"vscale", 571.0 / (double)pageHeight))
|
|
.embed(10, 92, 1200, 675,
|
|
VImage::option()->set("extend", "white"));
|
|
VImage composited = resized.composite2(tmpl, VIPS_BLEND_MODE_OVER);
|
|
img.push_back(composited);
|
|
}
|
|
VImage final = VImage::arrayjoin(img, VImage::option()->set("across", 1));
|
|
final.set(VIPS_META_PAGE_HEIGHT, 675);
|
|
|
|
void *buf;
|
|
size_t length;
|
|
final.write_to_buffer(
|
|
("." + type).c_str(), &buf, &length,
|
|
type == "gif" ? VImage::option()->set("dither", 0) : 0);
|
|
|
|
vips_thread_shutdown();
|
|
|
|
Napi::Object result = Napi::Object::New(env);
|
|
result.Set("data", Napi::Buffer<char>::Copy(env, (char *)buf, length));
|
|
result.Set("type", type);
|
|
return result;
|
|
} catch (std::exception const &err) {
|
|
throw Napi::Error::New(env, err.what());
|
|
} catch (...) {
|
|
throw Napi::Error::New(env, "Unknown error");
|
|
}
|
|
} |