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 class BitMap{

    19  public:

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

    21   BitMap();

    22 

    23   ~BitMap();

    24 

    25   int & imageLength() 

    26     {return fImageLength;};

    27 

    28   int & imageWidth()

    29     {return fImageWidth;};

    30 

    31   MapStatus & status()

    32     {return fStatus; };

    33 

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

    35 

    36 

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

    38 

    39   MapStatus readMap(char * filename);

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

    41     

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

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

    44   // Detect skew Angle 

    45   Angle skewAngle();

    46  

    47   //Rotate the map designated angle.  

    48   MapStatus rotateMap(Angle angl); 

    49   

    50 

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

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

    53   short int grayScale(Point & ul, Point & lr);

    54 

    55   // number of black pixels in bounding box

    56   int BitMap::pixelsInRegion(Point  ul, Point lr);

    57 

    58 private:

    59  

    60 

    61 	int fImageWidth;

    62 	int fImageLength;

    63 	MapStatus fStatus;

    64 	uchar ** fMapData;

    65 

    66 } ;

    67 

    68 

    69 

    70 #endif