107 lines
4.4 KiB
C++
107 lines
4.4 KiB
C++
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#include <napi.h>
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#include <vips/vips8>
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using namespace std;
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using namespace vips;
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Napi::Value Uncanny(const Napi::CallbackInfo &info) {
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Napi::Env env = info.Env();
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Napi::Object result = Napi::Object::New(env);
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try {
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Napi::Object obj = info[0].As<Napi::Object>();
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Napi::Buffer<char> data = obj.Get("data").As<Napi::Buffer<char>>();
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string caption = obj.Get("caption").As<Napi::String>().Utf8Value();
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string caption2 = obj.Get("caption2").As<Napi::String>().Utf8Value();
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string font = obj.Get("font").As<Napi::String>().Utf8Value();
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string type = obj.Get("type").As<Napi::String>().Utf8Value();
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string path = obj.Get("path").As<Napi::String>().Utf8Value();
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VOption *options = VImage::option()->set("access", "sequential");
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VImage in =
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VImage::new_from_buffer(data.Data(), data.Length(), "",
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type == "gif" ? options->set("n", -1) : options)
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.colourspace(VIPS_INTERPRETATION_sRGB)
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.extract_band(0, VImage::option()->set("n", 3));
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VImage base = VImage::black(1280, 720, VImage::option()->set("bands", 3));
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string font_string = (font == "roboto" ? "Roboto Condensed" : font) + " " +
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(font != "impact" ? "bold" : "normal") + " 72";
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string captionText = "<span background=\"black\" foreground=\"white\">" +
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caption + "</span>";
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string caption2Text =
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"<span background=\"black\" foreground=\"red\">" + caption2 + "</span>";
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VImage text =
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VImage::text(captionText.c_str(), VImage::option()
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->set("rgba", true)
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->set("align", VIPS_ALIGN_CENTRE)
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->set("font", font_string.c_str())
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->set("width", 588)
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->set("height", 90));
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VImage captionImage =
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text.extract_band(0, VImage::option()->set("n", 3))
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.gravity(VIPS_COMPASS_DIRECTION_CENTRE, 640, text.height() + 40,
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VImage::option()->set("extend", "black"));
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VImage text2 = VImage::text(caption2Text.c_str(),
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VImage::option()
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->set("rgba", true)
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->set("align", VIPS_ALIGN_CENTRE)
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->set("font", font_string.c_str())
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->set("width", 588)
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->set("height", 90));
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VImage caption2Image =
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text2.extract_band(0, VImage::option()->set("n", 3))
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.gravity(VIPS_COMPASS_DIRECTION_CENTRE, 640, text.height() + 40,
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VImage::option()->set("extend", "black"));
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base = base.insert(captionImage, 0, 0).insert(caption2Image, 640, 0);
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int width = in.width();
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int pageHeight = vips_image_get_page_height(in.get_image());
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int nPages = vips_image_get_n_pages(in.get_image());
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VImage uncanny = VImage::new_from_file(path.c_str());
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base = base.insert(uncanny, 0, 130);
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vector<VImage> img;
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for (int i = 0; i < nPages; i++) {
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VImage img_frame =
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type == "gif" ? in.crop(0, i * pageHeight, width, pageHeight) : in;
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VImage resized = img_frame.resize(690.0 / (double)width);
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if (resized.height() > 590) {
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double vscale = 590.0 / (double)resized.height();
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resized =
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resized.resize(vscale, VImage::option()->set("vscale", vscale));
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}
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VImage composited = base.insert(resized, 935 - (resized.width() / 2),
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425 - (resized.height() / 2));
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img.push_back(composited);
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}
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VImage final = VImage::arrayjoin(img, VImage::option()->set("across", 1));
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final.set(VIPS_META_PAGE_HEIGHT, 720);
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void *buf;
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size_t length;
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final.write_to_buffer(("." + type).c_str(), &buf, &length,
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type == "gif" ? VImage::option()->set("reoptimise", 1)
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: 0);
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result.Set("data", Napi::Buffer<char>::Copy(env, (char *)buf, length));
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result.Set("type", type);
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} catch (std::exception const &err) {
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Napi::Error::New(env, err.what()).ThrowAsJavaScriptException();
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} catch (...) {
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Napi::Error::New(env, "Unknown error").ThrowAsJavaScriptException();
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}
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vips_error_clear();
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vips_thread_shutdown();
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return result;
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}
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