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125 lines
4.2 KiB
C
125 lines
4.2 KiB
C
/******************************************************************************
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** Filename: mfoutline.h
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** Purpose: Interface spec for fx outline structures
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** Author: Dan Johnson
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** History: Thu May 17 08:55:32 1990, DSJ, Created.
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**
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** (c) Copyright Hewlett-Packard Company, 1988.
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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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#ifndef MFOUTLINE_H
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#define MFOUTLINE_H
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/**----------------------------------------------------------------------------
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Include Files and Type Defines
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----------------------------------------------------------------------------**/
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#include "blobs.h"
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#include "host.h"
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#include "oldlist.h"
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#include "fpoint.h"
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#include "params.h"
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#define NORMAL_X_HEIGHT (0.5)
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#define NORMAL_BASELINE (0.0)
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typedef LIST MFOUTLINE;
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typedef enum {
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north, south, east, west, northeast, northwest, southeast, southwest
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} DIRECTION;
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typedef struct {
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FPOINT Point;
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FLOAT32 Slope;
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unsigned Padding:20;
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BOOL8 Hidden:TRUE;
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BOOL8 ExtremityMark:TRUE;
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DIRECTION Direction:4;
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DIRECTION PreviousDirection:4;
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} MFEDGEPT;
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typedef enum {
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outer, hole
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} OUTLINETYPE;
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typedef enum {
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baseline, character
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} NORM_METHOD;
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/**----------------------------------------------------------------------------
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Macros
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----------------------------------------------------------------------------**/
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#define AverageOf(A,B) (((A) + (B)) / 2)
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/* macro for computing the scale factor to use to normalize characters */
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#define MF_SCALE_FACTOR (NORMAL_X_HEIGHT / kBlnXHeight)
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/* macros for manipulating micro-feature outlines */
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#define DegenerateOutline(O) (((O) == NIL_LIST) || ((O) == list_rest(O)))
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#define PointAt(O) ((MFEDGEPT *) first_node (O))
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#define NextPointAfter(E) (list_rest (E))
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#define MakeOutlineCircular(O) (set_rest (last (O), (O)))
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/* macros for manipulating micro-feature outline edge points */
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#define ClearMark(P) ((P)->ExtremityMark = FALSE)
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#define MarkPoint(P) ((P)->ExtremityMark = TRUE)
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/**----------------------------------------------------------------------------
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Public Function Prototypes
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----------------------------------------------------------------------------**/
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void ComputeBlobCenter(TBLOB *Blob, TPOINT *BlobCenter);
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LIST ConvertBlob(TBLOB *Blob);
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MFOUTLINE ConvertOutline(TESSLINE *Outline);
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LIST ConvertOutlines(TESSLINE *Outline,
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LIST ConvertedOutlines,
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OUTLINETYPE OutlineType);
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void FilterEdgeNoise(MFOUTLINE Outline, FLOAT32 NoiseSegmentLength);
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void FindDirectionChanges(MFOUTLINE Outline,
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FLOAT32 MinSlope,
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FLOAT32 MaxSlope);
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void FreeMFOutline(void *agr); //MFOUTLINE Outline);
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void FreeOutlines(LIST Outlines);
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void MarkDirectionChanges(MFOUTLINE Outline);
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MFEDGEPT *NewEdgePoint();
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MFOUTLINE NextExtremity(MFOUTLINE EdgePoint);
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void NormalizeOutline(MFOUTLINE Outline,
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FLOAT32 XOrigin);
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/*----------------------------------------------------------------------------
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Private Function Prototypes
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-----------------------------------------------------------------------------*/
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void ChangeDirection(MFOUTLINE Start, MFOUTLINE End, DIRECTION Direction);
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// Normalizes the Outline in-place using cn_denorm's local transformation,
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// then converts from the integer feature range [0,255] to the clusterer
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// feature range of [-0.5, 0.5].
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void CharNormalizeOutline(MFOUTLINE Outline, const DENORM& cn_denorm);
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void ComputeDirection(MFEDGEPT *Start,
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MFEDGEPT *Finish,
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FLOAT32 MinSlope,
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FLOAT32 MaxSlope);
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MFOUTLINE NextDirectionChange(MFOUTLINE EdgePoint);
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#endif
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