void Txtr::duplicateRectangleEdges(int x, int y, int width, int height)
{
if ( ! hasImage()) return;
restrain<int>(x, 0, this->width-1);
restrain<int>(y, 0, this->height-1);
restrain<int>(width, 1, this->width-x);
restrain<int>(height, 1, this->height-y);
dAssert((x >= 0) && (y >= 0));
int leftSpace = x;
int bottomSpace = y;
int rightSpace = this->width - (x+width);
int topSpace = this->height - (y+height);
// duplicate in four directions
duplicateColumn(x, y, height, -1, leftSpace); // left area
duplicateColumn(x+width-1, y, height, 1, rightSpace); // right area
duplicateRow(x, y, width, -1, bottomSpace); // bottom area
duplicateRow(x, y+height-1, width, 1, topSpace); // bottom area
//selectAndDuplicate(x, y, 0, 1, height, -1, 0, leftSpace); // left area
//selectAndDuplicate(x, y, 1, 0, width, 0, -1, bottomSpace); // bottom area
//selectAndDuplicate(x+width, y+height, 0, -1, height, 1, 0, rightSpace); // right area
//selectAndDuplicate(x+width, y+height, -1, 0, width, 0, 1, topSpace); // top area
//// duplicate the duplicates into the corners
//selectAndDuplicate(x, y, 0, -1, bottomSpace, -1, -1, leftSpace); // left bottom down
//selectAndDuplicate(x, y, -1, 0, leftSpace, -1, -1, leftSpace); // left bottom left
//selectAndDuplicate(x, y+height, -1, 0, leftSpace, -1, 1, leftSpace); // left top left
//selectAndDuplicate(x, y+height, 0, 1, topSpace, -1, 1, leftSpace); // left top up
//selectAndDuplicate(x+width, y+height, 0, 1, topSpace, 1, 1, rightSpace); // right top up
//selectAndDuplicate(x+width, y+height, 1, 0, rightSpace, 1, 1, rightSpace); // right top right
//selectAndDuplicate(x+width, y, 1, 0, rightSpace, 1, -1, rightSpace); // right bottom right
//selectAndDuplicate(x+width, y, 0, -1, bottomSpace, 1, -1, rightSpace); // right bottom down
// fill corners
fillArea(0, 0, leftSpace, bottomSpace, getPixel(x, y)); // left bottom
fillArea(0, y+height, leftSpace, topSpace, getPixel(x, y+height-1)); // top left
fillArea(x+width, y+height, rightSpace, topSpace, getPixel(x+width-1, y+height-1)); // top right
fillArea(x+width, 0, rightSpace, bottomSpace, getPixel(x+width-1, y)); // right bottom
}
/* checks if it is a valid square */
int safe(int twoDimArray[][9], int row, int col, int num)
{
if(duplicateRow(twoDimArray,row,num)) return 0;
if(duplicateCol(twoDimArray,col,num)) return 0;
if(duplicateInBox(twoDimArray, row - row % 3, col - col % 3, num)) return 0;
else return 1;
}