gap_map.h

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#ifndef GAP_MAP_H
#define GAP_MAP_H

#include "blobbox.h"

namespace tesseract {

class GAPMAP {
public:
  GAPMAP( // constructor
      TO_BLOCK *block);

  ~GAPMAP() { // destructor
    delete[] map;
  }

  bool table_gap(     // Is gap a table?
      int16_t left,   // From here
      int16_t right); // To here

private:
  int16_t total_rows;  // in block
  int16_t min_left;    // Left extreme
  int16_t max_right;   // Right extreme
  int16_t bucket_size; // half an x ht
  int16_t *map;        // empty counts
  int16_t map_max;     // map[0..max_map] defined
  bool any_tabs;
};

/*-----------------------------*/

extern BOOL_VAR_H(gapmap_debug, false, "Say which blocks have tables");
extern BOOL_VAR_H(gapmap_use_ends, false, "Use large space at start and end of rows");
extern BOOL_VAR_H(gapmap_no_isolated_quanta, false, "Ensure gaps not less than 2quanta wide");
extern double_VAR_H(gapmap_big_gaps, 1.75, "xht multiplier");

} // namespace tesseract

#endif