mrmBot-Matrix/natives/togif.cc

#include <vips/vips8>

#include "common.h"

using namespace std;
using namespace vips;

ArgumentMap ToGif(string type, string *outType, char *BufferData, size_t BufferLength,
            [[maybe_unused]] ArgumentMap Arguments, size_t *DataSize) {
  if (type == "gif") {
    *DataSize = BufferLength;
    char *data = (char *)malloc(BufferLength);
    memcpy(data, BufferData, BufferLength);

    ArgumentMap output;
    output["buf"] = data;

    return output;

  } else {
    VOption *options = VImage::option()->set("access", "sequential");

    VImage in = VImage::new_from_buffer(
        BufferData, BufferLength, "",
        type == "webp" ? options->set("n", -1) : options);

    void *buf;
    in.write_to_buffer(".gif", &buf, DataSize);
    *outType = "gif";

    ArgumentMap output;
    output["buf"] = (char *)buf;
    output["width"] = in.width();
    output["height"] = vips_image_get_page_height(in.get_image());

    return output;
  }
}