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204 lines
7.8 KiB
C
204 lines
7.8 KiB
C
/* -*-C-*-
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********************************************************************************
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*
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* File: seam.h (Formerly seam.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: Thu May 16 17:05:52 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 SEAM_H
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#define SEAM_H
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// Include automatically generated configuration file if running autoconf.
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#ifdef HAVE_CONFIG_H
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#include "config_auto.h"
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#endif
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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 "split.h"
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/*----------------------------------------------------------------------
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T y p e s
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----------------------------------------------------------------------*/
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typedef float PRIORITY; /* PRIORITY */
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class SEAM {
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public:
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// A seam with no splits
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SEAM(float priority, const TPOINT& location)
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: priority_(priority),
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location_(location),
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widthp_(0),
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widthn_(0),
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num_splits_(0) {}
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// A seam with a single split point.
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SEAM(float priority, const TPOINT& location, const SPLIT& split)
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: priority_(priority),
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location_(location),
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widthp_(0),
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widthn_(0),
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num_splits_(1) {
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splits_[0] = split;
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}
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// Default copy constructor, operator= and destructor are OK!
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// Accessors.
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float priority() const { return priority_; }
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void set_priority(float priority) { priority_ = priority; }
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bool HasAnySplits() const { return num_splits_ > 0; }
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// Returns the bounding box of all the points in the seam.
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TBOX bounding_box() const;
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// Returns true if other can be combined into *this.
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bool CombineableWith(const SEAM& other, int max_x_dist,
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float max_total_priority) const;
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// Combines other into *this. Only works if CombinableWith returned true.
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void CombineWith(const SEAM& other);
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// Returns true if the given blob contains all splits of *this SEAM.
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bool ContainedByBlob(const TBLOB& blob) const {
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for (int s = 0; s < num_splits_; ++s) {
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if (!splits_[s].ContainedByBlob(blob)) return false;
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}
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return true;
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}
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// Returns true if the given EDGEPT is used by this SEAM, 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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for (int s = 0; s < num_splits_; ++s) {
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if (splits_[s].UsesPoint(point)) return true;
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}
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return false;
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}
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// Returns true if *this and other share any common point, by coordinates.
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bool SharesPosition(const SEAM& other) const {
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for (int s = 0; s < num_splits_; ++s) {
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for (int t = 0; t < other.num_splits_; ++t)
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if (splits_[s].SharesPosition(other.splits_[t])) return true;
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}
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return false;
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}
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// Returns true if *this and other have any vertically overlapping splits.
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bool OverlappingSplits(const SEAM& other) const {
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for (int s = 0; s < num_splits_; ++s) {
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TBOX split1_box = splits_[s].bounding_box();
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for (int t = 0; t < other.num_splits_; ++t) {
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TBOX split2_box = other.splits_[t].bounding_box();
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if (split1_box.y_overlap(split2_box)) return true;
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}
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}
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return false;
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}
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// Marks the edgepts used by the seam so the segments made by the cut
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// never get split further by another seam in the future.
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void Finalize() {
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for (int s = 0; s < num_splits_; ++s) {
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splits_[s].point1->MarkChop();
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splits_[s].point2->MarkChop();
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}
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}
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// Returns true if the splits in *this SEAM appear OK in the sense that they
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// do not cross any outlines and do not chop off any ridiculously small
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// pieces.
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bool IsHealthy(const TBLOB& blob, int min_points, int min_area) const;
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// Computes the widthp_/widthn_ range for all existing SEAMs and for *this
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// seam, which is about to be inserted at insert_index. Returns false if
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// any of the computations fails, as this indicates an invalid chop.
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// widthn_/widthp_ are only changed if modify is true.
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bool PrepareToInsertSeam(const GenericVector<SEAM*>& seams,
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const GenericVector<TBLOB*>& blobs, int insert_index,
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bool modify);
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// Computes the widthp_/widthn_ range. Returns false if not all the splits
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// are accounted for. widthn_/widthp_ are only changed if modify is true.
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bool FindBlobWidth(const GenericVector<TBLOB*>& blobs, int index,
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bool modify);
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// Splits this blob into two blobs by applying the splits included in
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// *this SEAM
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void ApplySeam(bool italic_blob, TBLOB* blob, TBLOB* other_blob) const;
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// Undoes ApplySeam by removing the seam between these two blobs.
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// Produces one blob as a result, and deletes other_blob.
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void UndoSeam(TBLOB* blob, TBLOB* other_blob) const;
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// Prints everything in *this SEAM.
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void Print(const char* label) const;
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// Prints a collection of SEAMs.
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static void PrintSeams(const char* label, const GenericVector<SEAM*>& seams);
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#ifndef GRAPHICS_DISABLED
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// Draws the seam in the given window.
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void Mark(ScrollView* window) const;
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#endif
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// Break up the blobs in this chain so that they are all independent.
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// This operation should undo the affect of join_pieces.
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static void BreakPieces(const GenericVector<SEAM*>& seams,
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const GenericVector<TBLOB*>& blobs, int first,
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int last);
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// Join a group of base level pieces into a single blob that can then
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// be classified.
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static void JoinPieces(const GenericVector<SEAM*>& seams,
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const GenericVector<TBLOB*>& blobs, int first,
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int last);
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// Hides the seam 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 seam.
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void Reveal() const;
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// Computes and returns, but does not set, the full priority of *this SEAM.
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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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private:
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// Maximum number of splits that a SEAM can hold.
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static const int kMaxNumSplits = 3;
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// Priority of this split. Lower is better.
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float priority_;
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// Position of the middle of the seam.
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TPOINT location_;
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// A range such that all splits in *this SEAM are contained within blobs in
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// the range [index - widthn_,index + widthp_] where index is the index of
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// this SEAM in the seams vector.
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inT8 widthp_;
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inT8 widthn_;
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// Number of splits_ that are used.
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inT8 num_splits_;
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// Set of pairs of points that are the ends of each split in the SEAM.
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SPLIT splits_[kMaxNumSplits];
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};
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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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void start_seam_list(TWERD* word, GenericVector<SEAM*>* seam_array);
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#endif
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