PDBLK Class Reference

page block More...

#include <pdblock.h>

Inheritance diagram for PDBLK:

Public Member Functions
	PDBLK ()
	empty constructor More...
	PDBLK (inT16 xmin, inT16 ymin, inT16 xmax, inT16 ymax)
	simple constructor More...
void	set_sides (ICOORDELT_LIST *left, ICOORDELT_LIST *right)
	~PDBLK ()
	destructor More...
POLY_BLOCK *	poly_block () const
void	set_poly_block (POLY_BLOCK *blk)
	set the poly block More...
void	bounding_box (ICOORD &bottom_left, ICOORD &top_right) const
	get box More...
const TBOX &	bounding_box () const
	get real box More...
int	index () const
void	set_index (int value)
BOOL8	contains (ICOORD pt)
	is pt inside block More...
void	move (const ICOORD vec)
	reposition block More...
Pix *	render_mask (const FCOORD &rerotation, TBOX *mask_box)
void	plot (ScrollView *window, inT32 serial, ScrollView::Color colour)
PDBLK &	operator= (const PDBLK &source)

Protected Attributes
POLY_BLOCK *	hand_poly
ICOORDELT_LIST	leftside
ICOORDELT_LIST	rightside
TBOX	box
int	index_

Friends
class	BLOCK_RECT_IT

Detailed Description

page block

Definition at line 32 of file pdblock.h.

Constructor & Destructor Documentation

PDBLK() [1/2]

PDBLK::PDBLK ( )

inline

empty constructor

Definition at line 37 of file pdblock.h.

          {
    hand_poly = NULL;
    index_ = 0;
  }

PDBLK() [2/2]

PDBLK::PDBLK	(	inT16	xmin,
		inT16	ymin,
		inT16	xmax,
		inT16	ymax
	)

simple constructor

Definition at line 39 of file pdblock.cpp.

           :    box (ICOORD (xmin, ymin), ICOORD (xmax, ymax)) {
                                 //boundaries
  ICOORDELT_IT left_it = &leftside;
  ICOORDELT_IT right_it = &rightside;

  hand_poly = NULL;
  left_it.set_to_list (&leftside);
  right_it.set_to_list (&rightside);
                                 //make default box
  left_it.add_to_end (new ICOORDELT (xmin, ymin));
  left_it.add_to_end (new ICOORDELT (xmin, ymax));
  right_it.add_to_end (new ICOORDELT (xmax, ymin));
  right_it.add_to_end (new ICOORDELT (xmax, ymax));
  index_ = 0;
}

~PDBLK()

PDBLK::~PDBLK ( )

inline

destructor

Definition at line 53 of file pdblock.h.

{ delete hand_poly; }

Member Function Documentation

bounding_box() [1/2]

void PDBLK::bounding_box ( ICOORD &  bottom_left, ICOORD &  top_right  ) const

inline

get box

Definition at line 59 of file pdblock.h.

                                             {  // topright
    bottom_left = box.botleft();
    top_right = box.topright();
  }

bounding_box() [2/2]

const TBOX& PDBLK::bounding_box ( ) const

inline

get real box

Definition at line 65 of file pdblock.h.

{ return box; }

contains()

BOOL8 PDBLK::contains

(

ICOORD

pt

)

is pt inside block

Definition at line 87 of file pdblock.cpp.

                       {
  BLOCK_RECT_IT it = this;       //rectangle iterator
  ICOORD bleft, tright;          //corners of rectangle

  for (it.start_block (); !it.cycled_rects (); it.forward ()) {
                                 //get rectangle
    it.bounding_box (bleft, tright);
                                 //inside rect
    if (pt.x () >= bleft.x () && pt.x () <= tright.x ()
      && pt.y () >= bleft.y () && pt.y () <= tright.y ())
      return TRUE;               //is inside
  }
  return FALSE;                  //not inside
}

index()

int PDBLK::index ( ) const

inline

Definition at line 67 of file pdblock.h.

{ return index_; }

move()

void PDBLK::move

(

const ICOORD

vec

)

reposition block

Definition at line 111 of file pdblock.cpp.

                  {
  ICOORDELT_IT it(&leftside);

  for (it.mark_cycle_pt (); !it.cycled_list (); it.forward ())
    *(it.data ()) += vec;

  it.set_to_list (&rightside);

  for (it.mark_cycle_pt (); !it.cycled_list (); it.forward ())
    *(it.data ()) += vec;

  box.move (vec);
}

operator=()

PDBLK & PDBLK::operator=

(

const PDBLK &

source

)

assignment

Parameters

source

from this

Definition at line 238 of file pdblock.cpp.

  {
  //      this->ELIST_LINK::operator=(source);
  if (!leftside.empty ())
    leftside.clear ();
  if (!rightside.empty ())
    rightside.clear ();
  leftside.deep_copy(&source.leftside, &ICOORDELT::deep_copy);
  rightside.deep_copy(&source.rightside, &ICOORDELT::deep_copy);
  box = source.box;
  return *this;
}

plot()

void PDBLK::plot	(	ScrollView *	window,
		inT32	serial,
		ScrollView::Color	colour
	)

draw histogram

Parameters

window	window to draw in
serial	serial number
colour	colour to draw in

Definition at line 177 of file pdblock.cpp.

                  {
  ICOORD startpt;                //start of outline
  ICOORD endpt;                  //end of outline
  ICOORD prevpt;                 //previous point
  ICOORDELT_IT it = &leftside;   //iterator

                                 //set the colour
  window->Pen(colour);
  window->TextAttributes("Times", BLOCK_LABEL_HEIGHT, false, false, false);

  if (hand_poly != NULL) {
    hand_poly->plot(window, serial);
  } else if (!leftside.empty ()) {
    startpt = *(it.data ());     //bottom left corner
    //              tprintf("Block %d bottom left is (%d,%d)\n",
    //                      serial,startpt.x(),startpt.y());
    char temp_buff[34];
    #if defined(__UNIX__) || defined(MINGW)
    sprintf(temp_buff, "%" PRId32, serial);
    #else
    ultoa (serial, temp_buff, 10);
    #endif
    window->Text(startpt.x (), startpt.y (), temp_buff);

    window->SetCursor(startpt.x (), startpt.y ());
    do {
      prevpt = *(it.data ());    //previous point
      it.forward ();             //move to next point
                                 //draw round corner
    window->DrawTo(prevpt.x (), it.data ()->y ());
    window->DrawTo(it.data ()->x (), it.data ()->y ());
    }
    while (!it.at_last ());      //until end of list
    endpt = *(it.data ());       //end point

                                 //other side of boundary
    window->SetCursor(startpt.x (), startpt.y ());
    it.set_to_list (&rightside);
    prevpt = startpt;
    for (it.mark_cycle_pt (); !it.cycled_list (); it.forward ()) {
                                 //draw round corner
    window->DrawTo(prevpt.x (), it.data ()->y ());
    window->DrawTo(it.data ()->x (), it.data ()->y ());
      prevpt = *(it.data ());    //previous point
    }
                                 //close boundary
    window->DrawTo(endpt.x(), endpt.y());
  }
}

poly_block()

POLY_BLOCK* PDBLK::poly_block ( ) const

inline

Definition at line 55 of file pdblock.h.

{ return hand_poly; }

render_mask()

Pix * PDBLK::render_mask	(	const FCOORD &	rerotation,
		TBOX *	mask_box
	)

Definition at line 129 of file pdblock.cpp.

                                                                {
  TBOX rotated_box(box);
  rotated_box.rotate(rerotation);
  Pix* pix = pixCreate(rotated_box.width(), rotated_box.height(), 1);
  if (hand_poly != NULL) {
    // We are going to rotate, so get a deep copy of the points and
    // make a new POLY_BLOCK with it.
    ICOORDELT_LIST polygon;
    polygon.deep_copy(hand_poly->points(), ICOORDELT::deep_copy);
    POLY_BLOCK image_block(&polygon, hand_poly->isA());
    image_block.rotate(rerotation);
    // Block outline is a polygon, so use a PB_LINE_IT to get the
    // rasterized interior. (Runs of interior pixels on a line.)
    PB_LINE_IT *lines = new PB_LINE_IT(&image_block);
    for (int y = box.bottom(); y < box.top(); ++y) {
      const std::unique_ptr</*non-const*/ ICOORDELT_LIST> segments(lines->get_line(y));
      if (!segments->empty()) {
        ICOORDELT_IT s_it(segments.get());
        // Each element of segments is a start x and x size of the
        // run of interior pixels.
        for (s_it.mark_cycle_pt(); !s_it.cycled_list(); s_it.forward()) {
          int start = s_it.data()->x();
          int xext = s_it.data()->y();
          // Set the run of pixels to 1.
          pixRasterop(pix, start - rotated_box.left(),
                      rotated_box.height() - 1 - (y - rotated_box.bottom()),
                      xext, 1, PIX_SET, NULL, 0, 0);
        }
      }
    }
    delete lines;
  } else {
    // Just fill the whole block as there is only a bounding box.
    pixRasterop(pix, 0, 0, rotated_box.width(), rotated_box.height(),
                PIX_SET, NULL, 0, 0);
  }
  if (mask_box != NULL) *mask_box = rotated_box;
  return pix;
}

set_index()

void PDBLK::set_index ( int  value )

inline

Definition at line 68 of file pdblock.h.

{ index_ = value; }

set_poly_block()

void PDBLK::set_poly_block ( POLY_BLOCK *  blk )

inline

set the poly block

Definition at line 57 of file pdblock.h.

{ hand_poly = blk; }

set_sides()

void PDBLK::set_sides	(	ICOORDELT_LIST *	left,
		ICOORDELT_LIST *	right
	)

set vertex lists

Parameters

left	list of left vertices
right	list of right vertices

Definition at line 65 of file pdblock.cpp.

                       {
                                 //boundaries
  ICOORDELT_IT left_it = &leftside;
  ICOORDELT_IT right_it = &rightside;

  leftside.clear ();
  left_it.move_to_first ();
  left_it.add_list_before (left);
  rightside.clear ();
  right_it.move_to_first ();
  right_it.add_list_before (right);
}

Friends And Related Function Documentation

BLOCK_RECT_IT

friend class BLOCK_RECT_IT

friend

Definition at line 33 of file pdblock.h.

Member Data Documentation

box

TBOX PDBLK::box

protected

Definition at line 98 of file pdblock.h.

hand_poly

POLY_BLOCK* PDBLK::hand_poly

protected

Definition at line 95 of file pdblock.h.

index_

int PDBLK::index_

protected

Definition at line 99 of file pdblock.h.

leftside

ICOORDELT_LIST PDBLK::leftside

protected

Definition at line 96 of file pdblock.h.

rightside

ICOORDELT_LIST PDBLK::rightside

protected

Definition at line 97 of file pdblock.h.

---

The documentation for this class was generated from the following files:

• /home/stefan/src/github/tesseract-ocr/tesseract/ccstruct/pdblock.h
• /home/stefan/src/github/tesseract-ocr/tesseract/ccstruct/pdblock.cpp