Added bounce

commands/image-editing/bounce.js

@@ -0,0 +1,11 @@
+import ImageCommand from "../../classes/imageCommand.js";
+
+class BounceCommand extends ImageCommand {
+  static description = "Makes an image bounce up and down";
+  static aliases = ["bouncy"];
+
+  static noImage = "You need to provide an image/GIF to bounce!";
+  static command = "bounce";
+}
+
+export default BounceCommand;

natives/bounce.cc

@@ -0,0 +1,52 @@
+#include "common.h"
+#include <math.h>
+
+#include <vips/vips8>
+
+using namespace std;
+using namespace vips;
+
+char *Bounce(string *type, char *BufferData, size_t BufferLength,
+             ArgumentMap Arguments, size_t *DataSize) {
+
+  VOption *options = VImage::option();
+
+  VImage in =
+      VImage::new_from_buffer(
+          BufferData, BufferLength, "",
+          *type == "gif" ? options->set("n", -1)->set("access", "sequential")
+                         : options)
+          .colourspace(VIPS_INTERPRETATION_sRGB);
+  if (!in.has_alpha())
+    in = in.bandjoin(255);
+
+  int width = in.width();
+  int pageHeight = vips_image_get_page_height(in.get_image());
+  int nPages = *type == "gif" ? vips_image_get_n_pages(in.get_image()) : 15;
+  double mult = M_PI / nPages;
+  int halfHeight = pageHeight / 2;
+
+  vector<VImage> img;
+  for (int i = 0; i < nPages; i++) {
+    VImage img_frame =
+        *type == "gif" ? in.crop(0, i * pageHeight, width, pageHeight) : in;
+    double height = halfHeight * ((abs(sin(i * mult)) * -1) + 1);
+    VImage embedded = img_frame.embed(0, height, width, pageHeight + halfHeight);
+    img.push_back(embedded);
+  }
+  VImage final = VImage::arrayjoin(img, VImage::option()->set("across", 1));
+  final.set(VIPS_META_PAGE_HEIGHT, pageHeight + halfHeight);
+  if (*type != "gif") {
+    vector<int> delay(30, 50);
+    final.set("delay", delay);
+  }
+
+  void *buf;
+  final.write_to_buffer(".gif", &buf, DataSize);
+
+  *type = "gif";
+
+  vips_error_clear();
+  vips_thread_shutdown();
+  return (char *)buf;
+}

natives/bounce.h

@@ -0,0 +1,7 @@
+#pragma once
+
+#include "common.h"
+
+using std::string;
+
+char* Bounce(string* type, char* BufferData, size_t BufferLength, ArgumentMap Arguments, size_t* DataSize);

natives/image.cc

@@ -6,6 +6,7 @@
 #include <iostream>
 
 #include "blur.h"
+#include "bounce.h"
 #include "colors.h"
 #include "caption.h"
 #include "caption2.h"
@@ -53,6 +54,7 @@ using namespace std;
 
 std::map<std::string, char* (*)(string *type, char* BufferData, size_t BufferLength, ArgumentMap Arguments, size_t* DataSize)> FunctionMap = {
   {"blur", &Blur},
+  {"bounce", &Bounce},
 	{"caption", &Caption},
 	{"captionTwo", &CaptionTwo},
 	{"circle", &Circle},