1 #ifndef _BITMAP_H

     2 #define _BITMAP_H

     3 #include "system.h"

     4 

     5 /** A BitMap representation stores image in an array of unsigned character

     6     arrays.  There is one uchar array per row.  Each bit of the uchar 

     7     represents a pixel.

     8 ***/

     9 

    10 

    11 class RLEMap;

    12 class Point;

    13 class BitMap;

    14 

    15 extern void byteprint(char d);

    16 extern void bitprint(char d, int x);

    17 

    18 

    19 class BitMap{

    20  public:

    21   friend MapStatus convertMap(RLEMap *,BitMap*,Point,Point);

    22   friend MapStatus convertMap(BitMap *,RLEMap*,Point,Point);

    23 

    24   BitMap();

    25 

    26   ~BitMap();

    27 

    28   int & imageLength() 

    29     {return fImageLength;};

    30 

    31   int & imageWidth()

    32     {return fImageWidth;};

    33 

    34   readBit(Point  p);

    35 

    36   MapStatus & status()

    37     {return fStatus; };

    38 

    39   uchar * row(int i);         // returns a pointer to row i

    40 

    41 

    42   // I/O operations.  readMap and writeMap are from/to 2 level TIFF files

    43 

    44   MapStatus readMap(char * filename);

    45   MapStatus writeMap(char * filename);   // not done

    46     

    47   // Write out BitMap format for TCL/TK display

    48   MapStatus writeTclMap(char * filename, Point  ul, Point  lr, int scaledown);

    49   // Detect skew Angle 

    50   Angle skewAngle();

    51  

    52   //Rotate the map designated angle.  

    53   MapStatus rotateMap(Angle angl); 

    54   

    55 

    56   // Return a ratio of black pixels to white pixels

    57   // scaled to 255 0 = all white 255=all black

    58   short int grayScale(Point  ul, Point  lr);

    59 

    60   // number of black pixels in bounding box

    61   const int BitMap::pixelsInRegion( Point ul, Point lr);

    62   int BitMap::minThickness(Point  ul,  Point  lr);

    63 private:

    64  

    65 

    66 	int fImageWidth;

    67 	int fImageLength;

    68 	MapStatus fStatus;

    69 	uchar ** fMapData;

    70 

    71 } ;

    72 

    73 

    74 

    75 #endif

    76 

    77 

    78