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mfoutline.h
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1 /******************************************************************************
2  ** Filename: mfoutline.h
3  ** Purpose: Interface spec for fx outline structures
4  ** Author: Dan Johnson
5  ** History: Thu May 17 08:55:32 1990, DSJ, Created.
6  **
7  ** (c) Copyright Hewlett-Packard Company, 1988.
8  ** Licensed under the Apache License, Version 2.0 (the "License");
9  ** you may not use this file except in compliance with the License.
10  ** You may obtain a copy of the License at
11  ** http://www.apache.org/licenses/LICENSE-2.0
12  ** Unless required by applicable law or agreed to in writing, software
13  ** distributed under the License is distributed on an "AS IS" BASIS,
14  ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  ** See the License for the specific language governing permissions and
16  ** limitations under the License.
17  ******************************************************************************/
18 #ifndef MFOUTLINE_H
19 #define MFOUTLINE_H
20 
24 #include "host.h"
25 #include "oldlist.h"
26 #include "fpoint.h"
27 #include "baseline.h"
28 #include "params.h"
29 
30 #define NORMAL_X_HEIGHT (0.5)
31 #define NORMAL_BASELINE (0.0)
32 
33 typedef LIST MFOUTLINE;
34 
35 typedef enum {
37 } DIRECTION;
38 
39 typedef struct {
42  unsigned Padding:20;
43  BOOL8 Hidden:TRUE;
44  BOOL8 ExtremityMark:TRUE;
45  DIRECTION Direction:4;
46  DIRECTION PreviousDirection:4;
47 } MFEDGEPT;
48 
49 typedef enum {
51 } OUTLINETYPE;
52 
53 typedef struct {
54  FLOAT64 Mx, My; /* first moment of all outlines */
55  FLOAT64 L; /* total length of all outlines */
56  FLOAT64 x, y; /* center of mass of all outlines */
57  FLOAT64 Ix, Iy; /* second moments about center of mass axes */
58  FLOAT64 Rx, Ry; /* radius of gyration about center of mass axes */
60 
61 typedef enum {
63 } NORM_METHOD;
64 
68 #define AverageOf(A,B) (((A) + (B)) / 2)
69 
70 /* macro for computing the scale factor to use to normalize characters */
71 #define MF_SCALE_FACTOR (NORMAL_X_HEIGHT / BASELINE_SCALE)
72 
73 /* macros for manipulating micro-feature outlines */
74 #define DegenerateOutline(O) (((O) == NIL_LIST) || ((O) == list_rest(O)))
75 #define PointAt(O) ((MFEDGEPT *) first_node (O))
76 #define NextPointAfter(E) (list_rest (E))
77 #define MakeOutlineCircular(O) (set_rest (last (O), (O)))
78 
79 /* macros for manipulating micro-feature outline edge points */
80 #define ClearMark(P) ((P)->ExtremityMark = FALSE)
81 #define MarkPoint(P) ((P)->ExtremityMark = TRUE)
82 
86 void ComputeBlobCenter(TBLOB *Blob, TPOINT *BlobCenter);
87 
88 LIST ConvertBlob(TBLOB *Blob);
89 
91 
93  LIST ConvertedOutlines,
94  OUTLINETYPE OutlineType);
95 
96 void ComputeOutlineStats(LIST Outlines, OUTLINE_STATS *OutlineStats);
97 
98 void FilterEdgeNoise(MFOUTLINE Outline, FLOAT32 NoiseSegmentLength);
99 
100 void FindDirectionChanges(MFOUTLINE Outline,
101  FLOAT32 MinSlope,
102  FLOAT32 MaxSlope);
103 
104 void FreeMFOutline(void *agr); //MFOUTLINE Outline);
105 
106 void FreeOutlines(LIST Outlines);
107 
108 void MarkDirectionChanges(MFOUTLINE Outline);
109 
111 
113 
114 void NormalizeOutline(MFOUTLINE Outline,
115  FLOAT32 XOrigin);
116 
117 /*----------------------------------------------------------------------------
118  Private Function Prototypes
119 -----------------------------------------------------------------------------*/
120 void ChangeDirection(MFOUTLINE Start, MFOUTLINE End, DIRECTION Direction);
121 
122 void CharNormalizeOutline(MFOUTLINE Outline,
123  FLOAT32 XCenter,
124  FLOAT32 YCenter,
125  FLOAT32 XScale,
126  FLOAT32 YScale);
127 
128 void ComputeDirection(MFEDGEPT *Start,
129  MFEDGEPT *Finish,
130  FLOAT32 MinSlope,
131  FLOAT32 MaxSlope);
132 
133 void FinishOutlineStats(register OUTLINE_STATS *OutlineStats);
134 
135 void InitOutlineStats(OUTLINE_STATS *OutlineStats);
136 
138 
139 void UpdateOutlineStats(register OUTLINE_STATS *OutlineStats,
140  register FLOAT32 x1,
141  register FLOAT32 x2,
142  register FLOAT32 y1,
143  register FLOAT32 y2);
144 
145 #endif