kdu_tile_comp::get_num_resolutions

Returns the total number of available resolution levels, which is one more than the total number of accessible DWT levels. Note, however, that the return value is influenced by the number of discarded levels supplied in any call to kdu_codestream::apply_input_restrictions. The return value will be 0 if the current number of discarded levels exceeds the number of DWT levels used in compressing the tile-component.