Example #1
0
void POLY_BLOCK::fill(ScrollView* window, ScrollView::Color colour) {
  inT16 y;
  inT16 width;
  PB_LINE_IT *lines;
  ICOORDELT_LIST *segments;
  ICOORDELT_IT s_it;

  lines = new PB_LINE_IT (this);
  window->Pen(colour);

  for (y = this->bounding_box ()->bottom ();
  y <= this->bounding_box ()->top (); y++) {
    segments = lines->get_line (y);
    if (!segments->empty ()) {
      s_it.set_to_list (segments);
      for (s_it.mark_cycle_pt (); !s_it.cycled_list (); s_it.forward ()) {
        // Note different use of ICOORDELT, x coord is x coord of pixel
        // at the start of line segment, y coord is length of line segment
        // Last pixel is start pixel + length.
        width = s_it.data ()->y ();
        window->SetCursor(s_it.data ()->x (), y);
        window->DrawTo(s_it.data ()->x () + (float) width, y);
      }
    }
  }
}
Example #2
0
void make_margins(                         //get a line
                  PDBLK *block,            //block in image
                  BLOCK_LINE_IT *line_it,  //for old style
                  uinT8 *pixels,           //pixels to strip
                  uinT8 margin,            //white-out pixel
                  inT16 left,              //block edges
                  inT16 right,
                  inT16 y                  //line coord
                 ) {
  PB_LINE_IT *lines;
  ICOORDELT_LIST *segments;      //bits of a line
  ICOORDELT_IT seg_it;
  inT32 start;                   //of segment
  inT16 xext;                    //of segment
  int xindex;                    //index to pixel

  if (block->poly_block () != NULL) {
    lines = new PB_LINE_IT (block->poly_block ());
    segments = lines->get_line (y);
    if (!segments->empty ()) {
      seg_it.set_to_list (segments);
      seg_it.mark_cycle_pt ();
      start = seg_it.data ()->x ();
      xext = seg_it.data ()->y ();
      for (xindex = left; xindex < right; xindex++) {
        if (xindex >= start && !seg_it.cycled_list ()) {
          xindex = start + xext - 1;
          seg_it.forward ();
          start = seg_it.data ()->x ();
          xext = seg_it.data ()->y ();
        }
        else
          pixels[xindex - left] = margin;
      }
    }
    else {
      for (xindex = left; xindex < right; xindex++)
        pixels[xindex - left] = margin;
    }
    delete segments;
    delete lines;
  }
  else {
    start = line_it->get_line (y, xext);
    for (xindex = left; xindex < start; xindex++)
      pixels[xindex - left] = margin;
    for (xindex = start + xext; xindex < right; xindex++)
      pixels[xindex - left] = margin;
  }
}
Example #3
0
// Returns a binary Pix mask with a 1 pixel for every pixel within the
// block. Rotates the coordinate system by rerotation prior to rendering.
Pix* PDBLK::render_mask(const FCOORD& rerotation) {
  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) {
      ICOORDELT_LIST* segments = lines->get_line(y);
      if (!segments->empty()) {
        ICOORDELT_IT s_it(segments);
        // 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 segments;
    }
    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);
  }
  return pix;
}