#include "system.h"

#include "Point.h"

// Global Variables

Point NOPNT(-1,-1);      // Used for default entries

/* Global variables used to fine tune OCR.  These can be adjusted

   without recompiling by setting them in link_vars.tcl */

int NoiseTolerance = 1;      // Minumum number of pixels in a line of text

int MinLineSize = 5;        // Minimum number of rows in a line of text

int MinVertSeparation = 0;  // Minimum number of rows between lines of text

int MinHorizSeparation = 1; // Minimum number of cols between characters

int ConfidenceThreshold = 150; //Minimum confidence for some operations

int JoinTolerance = 6;        // Max number of pixels joining fused chars.

/* Number of properties in property vector for Components **/

int numProperties = 30;

/* Grid size for gray scale analysis */

int NumHorizDiv = 5;

int NumVertDiv = 5;

// The next four are used in character grouping set in Page::extractComponents

/* Group 0 - amo

   Group 1 - Descenders yjp

   Group 2 - Ascenders JPK

   Group 3 - Both descenders and Ascenders ()

   Group 4 - floaters * - `

*/

unsigned int NumCharGroups=5; 

int MaxVertSize = 50;        // Max vert pixels in char (used for baseline)

int BaseLineTolerance = 10;  // How far in 1/x of line size from base is okay

int TopLineTolerance  = 10; // How far in 1/x of line size from top is okay

                                // 20 = 5%, 10 = 10%

int MinComponentSize = 16;  // Minimum number of pixels in smallest character

uchar CharBitsSet[256];    // Table of number of bits set in each num 0-256

                           // Used for determining gray scale and pixel counts

/** Some globals set in learn() or readLearnedChars(). These are just starting

     values  **/

double MaxHWRatio = 0.0;

double MinHWRatio = 1000; 

int MinWidth = 1000;        // Min component width in learned set

Component * LearnedChars;   // Learned character averages  /** NOT USED **/

Components * LearnedGroups=NULL; //Learned character list array by group type

/*** Some values for TCL/TK interface.  These variables can be 

   set in the file link_vars.tcl without recompiling ***/

int ENABLE_USER_INTERFACE = 0;

int VERY_LOW_CONFIDENCE = 150;

int LOW_CONFIDENCE = 200;

int DISPLAY_LINE_BOUNDARIES = 0;

int DISPLAY_BOUNDING_BOXES = 0;  // boxes around components 

int SPELLCHECK = 0;

int DISPLAY_IMAGE = 1;

int DESKEW_METHOD = BITMAP_DESKEW;

double SCALE_FACTOR = 0.5;

void initCharBitsSet()

// Initializes lookup table for the number of bits set in a uchar

{

  int pixCount;

  for (int c = 0; c<256;c++)

      {

	pixCount = 0;

	for (int i = 7; i >=0; i--)

	  pixCount +=((c>>i)&1);      // if this is a black pixel

	CharBitsSet[c]=pixCount;

      }

}

char* backslashify(char* w)

/* backslashes all $ " [] {} () */

{

  int length = strlen(w);

  char* new_word = (char*)malloc(length*2);

  int new_word_pos = 0;

  for(int i = 0; i < length; i++)

    {

      if((w[i] == '$') ||

	 (w[i] == '[') ||

	 (w[i] == ']') ||

	 (w[i] == '\\') ||

	 (w[i] == '{') ||

	 (w[i] == '}') ||

	 (w[i] == '(') ||

	 (w[i] == ')') ||

	 (w[i] == ';'))

	{

	  new_word[new_word_pos] = '\\';

	  new_word[new_word_pos+1] = w[i];

	  new_word_pos += 2;

	}

      else

	{

	  new_word[new_word_pos] = w[i];

	  new_word_pos += 1;

	}

    }

  new_word[new_word_pos] = '\0';

  return new_word;

}

void invertBitsInBuffer(uchar * buf, int size)

{

  for(int i = 0; i < size; i++)

    buf[i] = ~buf[i] ;

}

short int countBitsSet(uchar c)

{

  int pixCount = 0;

/*

  for (int i = 7; i >=0; i--)

    pixCount +=((c>>i)&1);      // if this is a black pixel

*/

  return CharBitsSet[c];

}

int pixelsBetween(uchar * ar, int start, int end)

{

 // Counts the number of black pixels between start and end

  int startCharNum = start / 8;

  int endCharNum = end / 8 ; 

  int pixCount=0, startOffset, endOffset;

  uchar nextChar;

  startOffset = start - startCharNum*8;  // first bit of range in first char

  endOffset = end- endCharNum*8 + 1 ; // first bit after end in last char

     // count the whole characters

      for (int i = startCharNum + 1; i < endCharNum; i++)

	{

	  nextChar = ar[i];

	  pixCount += countBitsSet(nextChar);

	}

	  // Now add in end peices

	  // Get our part of the starting character

	  // Add in just the last part of the  char (get rid of hi bits)

	  nextChar = ar[startCharNum] << startOffset;

	  if (startCharNum != endCharNum )

             {

	       pixCount += countBitsSet(nextChar);

	       // Get our part of the ending character, 

	       // Add in just the first endOffset bits (get rid of lo bits)

	       nextChar = ar[endCharNum] >> (8 - endOffset);

	       pixCount += countBitsSet(nextChar);

	     }

         else

	   {

	     // just shift the adjusted starting char

	     int shift = (8-endOffset)+startOffset;

	     pixCount += countBitsSet(nextChar >> shift);

	   }

  return pixCount;

}

void setRange(uchar ar[], int start, int end)

// Sets bits from position start to position end 

{

  int startCharNum = start / 8;

  int endCharNum = end / 8 ; 

  int startOffset, endOffset;

  startOffset = start - startCharNum*8;  // first bit of range in first char

  endOffset = end- endCharNum*8 + 1 ; // first bit after end in last char

     // set the whole characters

      for (int i = startCharNum + 1; i < endCharNum; i++)

	{

	  ar[i] = 255;

	}

	  // Now set end peices

	  if (startCharNum != endCharNum )

             {

	       ar[startCharNum] |=  (255 >> startOffset);

	       ar[endCharNum] |= (255 << (8 - endOffset));

	     }

         else  // start and end char are the same

	   {

	     char mask = 255 >> startOffset;

	     mask  &= 255 << (8-endOffset);

	     ar[endCharNum] |= mask;

	   }

};