mrmBot-Matrix/natives/togif.cc

#include "common.h"

#include <vips/vips8>

using namespace std;
using namespace vips;

char *ToGif(string *type, char *BufferData, size_t BufferLength,
            ArgumentMap Arguments, size_t *DataSize) {

  if (*type == "gif") {
    vips_error_clear();
    vips_thread_shutdown();
    *DataSize = BufferLength;
    return BufferData;
  } 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);

    *type = "gif";

    vips_error_clear();
    vips_thread_shutdown();
    return (char *)buf;
  }
}