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);
}
}
}
}
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;
}
}
// 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* mask_box) {
TBOX rotated_box(box);
rotated_box.rotate(rerotation);
Pix* pix = pixCreate(rotated_box.width(), rotated_box.height(), 1);
if (hand_poly != nullptr) {
// 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.)
auto *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, nullptr, 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, nullptr, 0, 0);
}
if (mask_box != nullptr) *mask_box = rotated_box;
return pix;
}