125 lines
4.7 KiB
C++
125 lines
4.7 KiB
C++
#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 Motivate(const Napi::CallbackInfo &info) {
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Napi::Env env = info.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 top_text = obj.Get("top").As<Napi::String>().Utf8Value();
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string bottom_text = obj.Get("bottom").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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int delay =
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obj.Has("delay") ? obj.Get("delay").As<Napi::Number>().Int32Value() : 0;
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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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if (!in.has_alpha()) in = in.bandjoin(255);
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int width = in.width();
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int size = width / 5;
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int page_height = vips_image_get_page_height(in.get_image());
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int n_pages = vips_image_get_n_pages(in.get_image());
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int textWidth = width - ((width / 25) * 2);
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string font_string = font == "roboto" ? "Roboto Condensed" : font;
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string topText = "<span foreground=\"white\" background=\"black\">" +
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top_text + "</span>";
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VImage topImage = VImage::text(
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topText.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 + " " + to_string(size)).c_str())
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->set("width", textWidth));
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topImage.write_to_file("/home/esm/motivatetext2.png");
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VImage bottomImage;
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if (bottom_text != "") {
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string bottomText = "<span foreground=\"white\" background=\"black\">" +
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bottom_text + "</span>";
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bottomImage = VImage::text(
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bottomText.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 + " " + to_string(size * 0.4)).c_str())
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->set("width", textWidth));
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}
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vector<VImage> img;
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int height;
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for (int i = 0; i < n_pages; i++) {
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VImage img_frame =
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type == "gif" ? in.crop(0, i * page_height, width, page_height) : in;
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int borderSize = max(2, width / 66);
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int borderSize2 = borderSize * 0.5;
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VImage bordered =
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img_frame.embed(borderSize, borderSize, width + (borderSize * 2),
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page_height + (borderSize * 2),
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VImage::option()->set("extend", "black"));
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VImage bordered2 = bordered.embed(
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borderSize2, borderSize2, bordered.width() + (borderSize2 * 2),
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bordered.height() + (borderSize2 * 2),
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VImage::option()->set("extend", "white"));
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int addition = width / 8;
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int sideAddition = page_height * 0.4;
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VImage bordered3 = bordered2.embed(
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sideAddition / 2, addition / 2, bordered2.width() + sideAddition,
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bordered2.height() + addition,
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VImage::option()->set("extend", "black"));
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VImage frame = bordered3.join(
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topImage.gravity(VIPS_COMPASS_DIRECTION_NORTH, bordered3.width(),
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topImage.height() + (size / 4),
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VImage::option()->set("extend", "black")),
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VIPS_DIRECTION_VERTICAL,
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VImage::option()->set("background", 0x000000)->set("expand", true));
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if (bottom_text != "") {
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frame = frame.join(
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bottomImage.gravity(VIPS_COMPASS_DIRECTION_NORTH, bordered3.width(),
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bottomImage.height() + (size / 4),
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VImage::option()->set("extend", "black")),
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VIPS_DIRECTION_VERTICAL,
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VImage::option()->set("background", 0x000000)->set("expand", true));
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}
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height = frame.height();
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img.push_back(frame);
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}
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VImage final = VImage::arrayjoin(img, VImage::option()->set("across", 1))
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.extract_band(0, VImage::option()->set("n", 3));
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final.set(VIPS_META_PAGE_HEIGHT, height);
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if (delay) final.set("delay", delay);
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void *buf;
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size_t length;
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final.write_to_buffer(
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("." + type).c_str(), &buf, &length,
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type == "gif" ? VImage::option()->set("dither", 1) : 0);
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Napi::Object result = Napi::Object::New(env);
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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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return result;
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} catch (std::exception const &err) {
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throw Napi::Error::New(env, err.what());
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} catch (...) {
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throw Napi::Error::New(env, "Unknown error");
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}
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}
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