- unsigned int DispatchImage(const Image *image,const long x_offset,
- const long y_offset,const unsigned long columns,
- const unsigned long rows,const char *map,const StorageType type,
+ unsigned int DispatchImage(const Image *image,const ssize_t x_offset,
+ const ssize_t y_offset,const size_t columns,
+ const size_t rows,const char *map,const StorageType type,