int ReadDataFromGif(GifFileType *gifInfo, GifByteType *data, int length)
{
FILE *fp = reinterpret_cast<FILE*>(gifInfo->UserData);
int ReadDataFromGif(GifFileType *gifInfo, GifByteType *data, int length)
{
FILE *fp = reinterpret_cast<FILE*>(gifInfo->UserData);