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121 lines
5.0 KiB
C
121 lines
5.0 KiB
C
/* -*-C-*-
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********************************************************************************
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*
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* File: split.h (Formerly split.h)
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* Description:
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* Author: Mark Seaman, SW Productivity
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* Created: Fri Oct 16 14:37:00 1987
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* Modified: Mon May 13 10:49:23 1991 (Mark Seaman) marks@hpgrlt
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* Language: C
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* Package: N/A
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* Status: Reusable Software Component
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*
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* (c) Copyright 1987, Hewlett-Packard Company.
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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** http://www.apache.org/licenses/LICENSE-2.0
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*
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*****************************************************************************/
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#ifndef SPLIT_H
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#define SPLIT_H
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/*----------------------------------------------------------------------
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I n c l u d e s
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----------------------------------------------------------------------*/
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#include "blobs.h"
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#include "scrollview.h"
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/*----------------------------------------------------------------------
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T y p e s
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----------------------------------------------------------------------*/
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struct SPLIT {
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SPLIT() : point1(nullptr), point2(nullptr) {}
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SPLIT(EDGEPT* pt1, EDGEPT* pt2) : point1(pt1), point2(pt2) {}
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// Returns the bounding box of all the points in the split.
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TBOX bounding_box() const;
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// Returns the bounding box of the outline from point1 to point2.
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TBOX Box12() const { return point1->SegmentBox(point2); }
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// Returns the bounding box of the outline from point1 to point1.
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TBOX Box21() const { return point2->SegmentBox(point1); }
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// Returns the bounding box of the out
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// Hides the SPLIT so the outlines appear not to be cut by it.
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void Hide() const;
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// Undoes hide, so the outlines are cut by the SPLIT.
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void Reveal() const;
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// Returns true if the given EDGEPT is used by this SPLIT, checking only
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// the EDGEPT pointer, not the coordinates.
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bool UsesPoint(const EDGEPT* point) const {
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return point1 == point || point2 == point;
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}
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// Returns true if the other SPLIT has any position shared with *this.
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bool SharesPosition(const SPLIT& other) const {
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return point1->EqualPos(*other.point1) || point1->EqualPos(*other.point2) ||
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point2->EqualPos(*other.point1) || point2->EqualPos(*other.point2);
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}
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// Returns true if both points are contained within the blob.
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bool ContainedByBlob(const TBLOB& blob) const {
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return blob.Contains(point1->pos) && blob.Contains(point2->pos);
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}
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// Returns true if both points are contained within the outline.
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bool ContainedByOutline(const TESSLINE& outline) const {
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return outline.Contains(point1->pos) && outline.Contains(point2->pos);
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}
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// Compute a split priority based on the bounding boxes of the parts.
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// The arguments here are config parameters defined in Wordrec. Add chop_
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// to the beginning of the name.
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float FullPriority(int xmin, int xmax, double overlap_knob,
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int centered_maxwidth, double center_knob,
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double width_change_knob) const;
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// Returns true if *this SPLIT appears OK in the sense that it does not cross
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// any outlines and does not chop off any ridiculously small pieces.
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bool IsHealthy(const TBLOB& blob, int min_points, int min_area) const;
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// Returns true if the split generates a small chunk in terms of either area
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// or number of points.
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bool IsLittleChunk(int min_points, int min_area) const;
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void Print() const;
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#ifndef GRAPHICS_DISABLED
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// Draws the split in the given window.
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void Mark(ScrollView* window) const;
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#endif
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// Creates two outlines out of one by splitting the original one in half.
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// Inserts the resulting outlines into the given list.
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void SplitOutlineList(TESSLINE* outlines) const;
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// Makes a split between these two edge points, but does not affect the
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// outlines to which they belong.
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void SplitOutline() const;
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// Undoes the effect of SplitOutlineList, correcting the outlines for undoing
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// the split, but possibly leaving some duplicate outlines.
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void UnsplitOutlineList(TBLOB* blob) const;
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// Removes the split that was put between these two points.
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void UnsplitOutlines() const;
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EDGEPT *point1;
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EDGEPT *point2;
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};
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/*----------------------------------------------------------------------
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V a r i a b l e s
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----------------------------------------------------------------------*/
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extern BOOL_VAR_H(wordrec_display_splits, 0, "Display splits");
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/*----------------------------------------------------------------------
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F u n c t i o n s
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----------------------------------------------------------------------*/
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EDGEPT *make_edgept(int x, int y, EDGEPT *next, EDGEPT *prev);
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void remove_edgept(EDGEPT *point);
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#endif
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