Add uncanny, detect filename from image link

natives/image.cc

@@ -30,6 +30,7 @@
 #include "spin.h"
 #include "tile.h"
 #include "togif.h"
+#include "uncanny.h"
 #include "uncaption.h"
 #include "wall.h"
 #include "watermark.h"
@@ -79,6 +80,7 @@ Napi::Object Init(Napi::Env env, Napi::Object exports)
   exports.Set(Napi::String::New(env, "swirl"), Napi::Function::New(env, Swirl));
   exports.Set(Napi::String::New(env, "tile"), Napi::Function::New(env, Tile));
   exports.Set(Napi::String::New(env, "togif"), Napi::Function::New(env, ToGif));
+  exports.Set(Napi::String::New(env, "uncanny"), Napi::Function::New(env, Uncanny));
   exports.Set(Napi::String::New(env, "uncaption"), Napi::Function::New(env, Uncaption));
   exports.Set(Napi::String::New(env, "wall"), Napi::Function::New(env, Wall));
   exports.Set(Napi::String::New(env, "watermark"), Napi::Function::New(env, Watermark));

natives/uncanny.cc

@@ -0,0 +1,109 @@
+#include <iostream>
+#include <napi.h>
+
+#include <vips/image.h>
+#include <vips/vips8>
+
+using namespace std;
+using namespace vips;
+
+Napi::Value Uncanny(const Napi::CallbackInfo &info) {
+  Napi::Env env = info.Env();
+  Napi::Object result = Napi::Object::New(env);
+
+  try {
+    Napi::Object obj = info[0].As<Napi::Object>();
+    Napi::Buffer<char> data = obj.Get("data").As<Napi::Buffer<char>>();
+    string caption = obj.Get("caption").As<Napi::String>().Utf8Value();
+    string caption2 = obj.Get("caption2").As<Napi::String>().Utf8Value();
+    string font = obj.Get("font").As<Napi::String>().Utf8Value();
+    string type = obj.Get("type").As<Napi::String>().Utf8Value();
+    string path = obj.Get("path").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)
+            .extract_band(0, VImage::option()->set("n", 3));
+
+    VImage base = VImage::black(1280, 720, VImage::option()->set("bands", 3));
+
+    string font_string = (font == "roboto" ? "Roboto Condensed" : font) + " " +
+                         (font != "impact" ? "bold" : "normal") + " 72";
+
+    string captionText = "<span background=\"black\" foreground=\"white\">" +
+                         caption + "</span>";
+    string caption2Text =
+        "<span background=\"black\" foreground=\"red\">" + caption2 + "</span>";
+
+    VImage text =
+        VImage::text(captionText.c_str(), VImage::option()
+                                              ->set("rgba", true)
+                                              ->set("align", VIPS_ALIGN_CENTRE)
+                                              ->set("font", font_string.c_str())
+                                              ->set("width", 588)
+                                              ->set("height", 90));
+    VImage captionImage =
+        text.extract_band(0, VImage::option()->set("n", 3))
+            .gravity(VIPS_COMPASS_DIRECTION_CENTRE, 640, text.height() + 40,
+                     VImage::option()->set("extend", "black"));
+
+    VImage text2 = VImage::text(caption2Text.c_str(),
+                                VImage::option()
+                                    ->set("rgba", true)
+                                    ->set("align", VIPS_ALIGN_CENTRE)
+                                    ->set("font", font_string.c_str())
+                                    ->set("width", 588)
+                                    ->set("height", 90));
+    VImage caption2Image =
+        text2.extract_band(0, VImage::option()->set("n", 3))
+            .gravity(VIPS_COMPASS_DIRECTION_CENTRE, 640, text.height() + 40,
+                     VImage::option()->set("extend", "black"));
+
+    base = base.insert(captionImage, 0, 0).insert(caption2Image, 640, 0);
+
+    int width = in.width();
+    int pageHeight = vips_image_get_page_height(in.get_image());
+    int nPages = vips_image_get_n_pages(in.get_image());
+
+    VImage uncanny = VImage::new_from_file(path.c_str());
+
+    base = base.insert(uncanny, 0, 130);
+
+    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(690.0 / (double)width);
+      if (resized.height() > 590) {
+        double vscale = 590.0 / (double)resized.height();
+        resized =
+            resized.resize(vscale, VImage::option()->set("vscale", vscale));
+      }
+      VImage composited = base.insert(resized, 935 - (resized.width() / 2),
+                                      425 - (resized.height() / 2));
+      img.push_back(composited);
+    }
+    VImage final = VImage::arrayjoin(img, VImage::option()->set("across", 1));
+    final.set(VIPS_META_PAGE_HEIGHT, 720);
+
+    void *buf;
+    size_t length;
+    final.write_to_buffer(("." + type).c_str(), &buf, &length,
+                          type == "gif" ? VImage::option()->set("reoptimise", 1)
+                                        : 0);
+
+    result.Set("data", Napi::Buffer<char>::Copy(env, (char *)buf, length));
+    result.Set("type", type);
+  } catch (std::exception const &err) {
+    Napi::Error::New(env, err.what()).ThrowAsJavaScriptException();
+  } catch (...) {
+    Napi::Error::New(env, "Unknown error").ThrowAsJavaScriptException();
+  }
+
+  vips_error_clear();
+  vips_thread_shutdown();
+  return result;
+}

natives/uncanny.h

@@ -0,0 +1,5 @@
+#pragma once
+
+#include <napi.h>
+
+Napi::Value Uncanny(const Napi::CallbackInfo& info);