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find.c

/*
GOCR Copyright (C) 2000  Joerg Schulenburg Joerg.Schulenburg@physik.uni-magdeburg.de 
GOCR API Copyright (C) 2001 Bruno Barberi Gnecco <brunobg@sourceforge.net>

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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/
 
#include "_gocr.h"
#include "gocr_char.h"
#include "unicode.h"

static int began = 0;

gocrBox *currentbox;

/* idea: charBegin inits a structure;
   charset* sets bits in the image, and update the frame;
   charEnd creates a new image, sized frame, all white, and fills with the
       pixels set by charset*, and calls the charRecognizer module (how?
       by a signal? directly by runModule? 
*/
int gocr_charBegin ( void ) {
  _gocr_debug(3, fprintf(_data.error, "gocr_charBegin()\n");)
  if ( began ) {
    _gocr_debug(1, fprintf(_data.error, "Character already begun\n");)
    return -1;
  }

  began++;
  currentbox = (gocrBox *)malloc(sizeof(gocrBox));
  if ( !currentbox ) {
    _gocr_debug(1, fprintf(_data.error, "charBegin: not enough memory\n");)
    return -1;
  }
    
  /* set the boundaries in such a way that they are not valid and will be updated */
  currentbox->x0 = currentblock->x1+1;
  currentbox->y0 = currentblock->y1+1;
  currentbox->x1 = currentblock->x0-1;
  currentbox->y1 = currentblock->y0-1;

  currentbox->attributes = NULL;

  list_init(&currentbox->possible);
  currentbox->ch = NULL;

  /* deprecated fields */
  currentbox->c = currentbox->ac = currentbox->modifier = UNICODE_NULL;

  return 0;
}

int gocr_charEnd ( void ) {
  _gocr_debug(3, fprintf(_data.error, "gocr_charEnd()\n");)

  if ( !began ) {
    _gocr_debug(1, fprintf(_data.error, "Character not begun\n");)
    return -1;
  }

  began--;
  
  list_app(&currentblock->boxlist, currentbox);

  return 0;
}

int gocr_charSetAllNearPixels ( int action, int x, int y ) {
  _gocr_debug(3, fprintf(_data.error, "gocr_charSetAllNearPixels(%d, %d, %d)\n",
      action, x, y);)

  if ( !began ) {
    _gocr_debug(1, fprintf(_data.error, "Character not begun\n");)
    return -1;
  }
  _gocr_debug(0, fprintf(_data.error, "gocr_charSetAllNearPixels not done yet\n");)
}

int gocr_charSetAttribute ( int action, char *name, ... ) {
  _gocr_debug(3, fprintf(_data.error, "gocr_charSetAttribute(%d, %s)\n", 
      action, name);)

  if ( !began ) {
    _gocr_debug(1, fprintf(_data.error, "Character not begun\n");)
    return -1;
  }

  _gocr_debug(0, fprintf(_data.error, "gocr_charSetAttribute: use gocr_boxSetAttribute instead \n");)
   return -1;
//  return gocr_boxAttributeSet(currentbox, action, name, ...);
}

int gocr_charSetPixel ( int action, int x, int y ) {
  _gocr_debug(3, fprintf(_data.error, "gocr_charSetPixel(%d, %d, %d)\n", 
      action, x, y);)

  if ( !began ) {
    _gocr_debug(1, fprintf(_data.error, "Character not begun\n");)
    return -1;
  }

  /* check boundaries */
  if ( x < currentblock->x0 || x > currentblock->x1 ||
       y < currentblock->x0 || y > currentblock->x1 ) {
      _gocr_debug(1, fprintf(_data.error, "Pixel out of bounds.\n");)
      return -1;
  }

  /* update new boundaries */  
  if ( x < currentbox->x0 )
    currentbox->x0 = x;
  if ( x > currentbox->x1 )
    currentbox->x1 = x;
  if ( y < currentbox->y0 )
    currentbox->y0 = y;
  if ( y > currentbox->y1 )
    currentbox->y1 = y;

  currentblock->image.data[x][y].ischar = action;
  return 0;
}

int gocr_charSetRect ( int action, int x0, int y0, int x1, int y1 ) {
  int i, j;
  _gocr_debug(3, fprintf(_data.error, "gocr_charSetRect(%d, %d, %d, %d, %d)\n", 
      action, x0, y0, x1, y1);)

  if ( !began ) {
    _gocr_debug(1, fprintf(_data.error, "Character not begun\n");)
    return -1;
  }

  /* should reverse x and y if needed */
  _gocr_fixParameters ( &x0, &y0, &x1, &y1 );

  /* check boundaries */
  if ( x0 < currentblock->x0 || x0 > currentblock->x1 ||
       x1 < currentblock->x0 || x1 > currentblock->x1 ||
       y0 < currentblock->x0 || y0 > currentblock->x1 ||
       y1 < currentblock->x0 || y1 > currentblock->x1 ) {
      _gocr_debug(1, fprintf(_data.error, "Rectangle out of bounds.\n");)
      return -1;
  }

  /* update new boundaries */  
  if ( x0 < currentbox->x0 )
    currentbox->x0 = x0;
  if ( x1 > currentbox->x1 )
    currentbox->x1 = x1;
  if ( y0 < currentbox->y0 )
    currentbox->y0 = y0;
  if ( y1 > currentbox->y1 )
    currentbox->y1 = y1;

  for ( ; i <= x1; x0++ )
    for ( ; j <= y1; x1++ )
      currentblock->image.data[i][j].ischar = action;

  return 0;
}

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