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/* GNU Ocrad - Optical Character Recognition program
Copyright (C) 2003, 2004, 2005, 2006 Antonio Diaz Diaz.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
class Bitmap : public Rectangle
{
std::vector< std::vector< char > > data; // char is faster than bool
public:
// Creates a blank Bitmap
Bitmap( const int l, const int t, const int r, const int b ) throw();
// Creates a Bitmap from part of another Bitmap
Bitmap( const Bitmap & source, const Rectangle & re ) throw();
using Rectangle::left;
using Rectangle::top;
using Rectangle::right;
using Rectangle::bottom;
using Rectangle::height;
using Rectangle::width;
void left ( const int l ) throw();
void top ( const int t ) throw();
void right ( const int r ) throw();
void bottom( const int b ) throw();
void height( const int h ) throw() { bottom( top() + h - 1 ); }
void width ( const int w ) throw() { right( left() + w - 1 ); }
void add_bitmap( const Bitmap & bm ) throw();
void add_point( const int row, const int col ) throw();
void add_rectangle( const Rectangle & re ) throw();
bool adjust_height() throw();
bool get_bit( const int row, const int col ) const throw()
{ return data[row-top()][col-left()]; }
void set_bit( const int row, const int col, const bool bit ) throw()
{ data[row-top()][col-left()] = bit; }
int area() const throw(); // 'area' means filled area
int area_octagon() const throw();
int size_octagon() const throw();
int seek_left ( const int row, const int col, const bool black = true ) const throw();
int seek_top ( const int row, const int col, const bool black = true ) const throw();
int seek_right ( const int row, const int col, const bool black = true ) const throw();
int seek_bottom( const int row, const int col, const bool black = true ) const throw();
bool escape_left ( int row, int col ) const throw();
bool escape_top ( int row, int col ) const throw();
bool escape_right ( int row, int col ) const throw();
bool escape_bottom( int row, int col ) const throw();
int follow_top ( int row, int col ) const throw();
int follow_bottom( int row, int col ) const throw();
bool top_hook ( int *hdiff ) const throw();
bool bottom_hook( int *hdiff ) const throw();
};
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