/usr/include/tesseract/polyblk.h is in libtesseract-dev 3.02.01-6.
This file is owned by root:root, with mode 0o644.
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* File: polyblk.h (Formerly poly_block.h)
* Description: Polygonal blocks
* Author: Sheelagh Lloyd?
* Created:
*
* (C) Copyright 1993, Hewlett-Packard Ltd.
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
** http://www.apache.org/licenses/LICENSE-2.0
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*
**********************************************************************/
#ifndef POLYBLK_H
#define POLYBLK_H
#include "publictypes.h"
#include "elst.h"
#include "points.h"
#include "rect.h"
#include "scrollview.h"
#include "hpddef.h" // must be last (handpd.dll)
class DLLSYM POLY_BLOCK {
public:
POLY_BLOCK() {
}
// Initialize from box coordinates.
POLY_BLOCK(const TBOX& box, PolyBlockType type);
POLY_BLOCK(ICOORDELT_LIST *points, PolyBlockType type);
~POLY_BLOCK () {
}
TBOX *bounding_box() { // access function
return &box;
}
ICOORDELT_LIST *points() { // access function
return &vertices;
}
void compute_bb();
PolyBlockType isA() const {
return type;
}
bool IsText() const {
return PTIsTextType(type);
}
// Rotate about the origin by the given rotation. (Analogous to
// multiplying by a complex number.
void rotate(FCOORD rotation);
// Reflect the coords of the polygon in the y-axis. (Flip the sign of x.)
void reflect_in_y_axis();
// Move by adding shift to all coordinates.
void move(ICOORD shift);
void plot(ScrollView* window, inT32 num);
void fill(ScrollView* window, ScrollView::Color colour);
// Returns true if other is inside this.
bool contains(POLY_BLOCK *other);
// Returns true if the polygons of other and this overlap.
bool overlap(POLY_BLOCK *other);
// Returns the winding number of this around the test_pt.
// Positive for anticlockwise, negative for clockwise, and zero for
// test_pt outside this.
inT16 winding_number(const ICOORD &test_pt);
// Static utility functions to handle the PolyBlockType.
// Returns a color to draw the given type.
static ScrollView::Color ColorForPolyBlockType(PolyBlockType type);
private:
ICOORDELT_LIST vertices; // vertices
TBOX box; // bounding box
PolyBlockType type; // Type of this region.
};
// Class to iterate the scanlines of a polygon.
class DLLSYM PB_LINE_IT {
public:
PB_LINE_IT(POLY_BLOCK *blkptr) {
block = blkptr;
}
void set_to_block(POLY_BLOCK * blkptr) {
block = blkptr;
}
// Returns a list of runs of pixels for the given y coord.
// Each element of the returned list is the start (x) and extent(y) of
// a run inside the region.
// Delete the returned list after use.
ICOORDELT_LIST *get_line(inT16 y);
private:
POLY_BLOCK * block;
};
#endif
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