tesseract 4.1.1
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protos.cpp
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1/* -*-C-*-
2 ******************************************************************************
3 *
4 * File: protos.cpp (Formerly protos.c)
5 * Author: Mark Seaman, OCR Technology
6 *
7 * (c) Copyright 1987, Hewlett-Packard Company.
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 *****************************************************************************/
19/*----------------------------------------------------------------------
20 I n c l u d e s
21----------------------------------------------------------------------*/
22#define _USE_MATH_DEFINES // for M_PI
23#include "protos.h"
24#include <cmath> // for M_PI
25#include <cstdio>
26#include "emalloc.h"
27#include "callcpp.h"
28#include "tprintf.h"
29#include "classify.h"
30#include "params.h"
31#include "intproto.h"
32
33#define PROTO_INCREMENT 32
34#define CONFIG_INCREMENT 16
35
36/*----------------------------------------------------------------------
37 F u n c t i o n s
38----------------------------------------------------------------------*/
48 int NewNumConfigs;
49 int NewConfig;
50 int MaxNumProtos;
52
53 MaxNumProtos = Class->MaxNumProtos;
54 ASSERT_HOST(MaxNumProtos <= MAX_NUM_PROTOS);
55
56 if (Class->NumConfigs >= Class->MaxNumConfigs) {
57 /* add configs in CONFIG_INCREMENT chunks at a time */
58 NewNumConfigs = (((Class->MaxNumConfigs + CONFIG_INCREMENT) /
60
61 Class->Configurations =
62 static_cast<CONFIGS>(Erealloc (Class->Configurations,
63 sizeof (BIT_VECTOR) * NewNumConfigs));
64
65 Class->MaxNumConfigs = NewNumConfigs;
66 }
67 NewConfig = Class->NumConfigs++;
68 Config = NewBitVector(MAX_NUM_PROTOS);
69 Class->Configurations[NewConfig] = Config;
70 zero_all_bits (Config, WordsInVectorOfSize(MAX_NUM_PROTOS));
71
72 return (NewConfig);
73}
74
75
85 if (Class->NumProtos >= Class->MaxNumProtos) {
86 /* add protos in PROTO_INCREMENT chunks at a time */
87 int NewNumProtos = (((Class->MaxNumProtos + PROTO_INCREMENT) /
89
90 Class->Prototypes = static_cast<PROTO>(Erealloc (Class->Prototypes,
91 sizeof (PROTO_STRUCT) *
92 NewNumProtos));
93
94 Class->MaxNumProtos = NewNumProtos;
95 ASSERT_HOST(NewNumProtos <= MAX_NUM_PROTOS);
96 }
97 int NewProto = Class->NumProtos++;
99 return (NewProto);
100}
101
102
103/**********************************************************************
104 * FillABC
105 *
106 * Fill in Protos A, B, C fields based on the X, Y, Angle fields.
107 **********************************************************************/
108void FillABC(PROTO Proto) {
109 float Slope, Intercept, Normalizer;
110
111 Slope = tan(Proto->Angle * 2.0 * M_PI);
112 Intercept = Proto->Y - Slope * Proto->X;
113 Normalizer = 1.0 / sqrt (Slope * Slope + 1.0);
114 Proto->A = Slope * Normalizer;
115 Proto->B = -Normalizer;
116 Proto->C = Intercept * Normalizer;
117}
118
119
120/**********************************************************************
121 * FreeClass
122 *
123 * Deallocate the memory consumed by the specified class.
124 **********************************************************************/
126 if (Class) {
127 FreeClassFields(Class);
128 delete Class;
129 }
130}
131
132
133/**********************************************************************
134 * FreeClassFields
135 *
136 * Deallocate the memory consumed by subfields of the specified class.
137 **********************************************************************/
139 int i;
140
141 if (Class) {
142 if (Class->MaxNumProtos > 0) free(Class->Prototypes);
143 if (Class->MaxNumConfigs > 0) {
144 for (i = 0; i < Class->NumConfigs; i++)
145 FreeBitVector (Class->Configurations[i]);
146 free(Class->Configurations);
147 }
148 }
149}
150
151/**********************************************************************
152 * NewClass
153 *
154 * Allocate a new class with enough memory to hold the specified number
155 * of prototypes and configurations.
156 **********************************************************************/
157CLASS_TYPE NewClass(int NumProtos, int NumConfigs) {
158 CLASS_TYPE Class;
159
160 Class = new CLASS_STRUCT;
161
162 if (NumProtos > 0)
163 Class->Prototypes = static_cast<PROTO>(Emalloc (NumProtos * sizeof (PROTO_STRUCT)));
164
165 if (NumConfigs > 0)
166 Class->Configurations = static_cast<CONFIGS>(Emalloc (NumConfigs *
167 sizeof (BIT_VECTOR)));
168 Class->MaxNumProtos = NumProtos;
169 Class->MaxNumConfigs = NumConfigs;
170 Class->NumProtos = 0;
171 Class->NumConfigs = 0;
172 return (Class);
173
174}
#define ASSERT_HOST(x)
Definition: errcode.h:88
#define MAX_NUM_PROTOS
Definition: intproto.h:48
void FreeClass(CLASS_TYPE Class)
Definition: protos.cpp:125
#define PROTO_INCREMENT
Definition: protos.cpp:33
int AddProtoToClass(CLASS_TYPE Class)
Definition: protos.cpp:84
void FreeClassFields(CLASS_TYPE Class)
Definition: protos.cpp:138
int AddConfigToClass(CLASS_TYPE Class)
Definition: protos.cpp:47
#define CONFIG_INCREMENT
Definition: protos.cpp:34
void FillABC(PROTO Proto)
Definition: protos.cpp:108
CLASS_TYPE NewClass(int NumProtos, int NumConfigs)
Definition: protos.cpp:157
BIT_VECTOR * CONFIGS
Definition: protos.h:34
uint32_t * BIT_VECTOR
Definition: bitvec.h:28
void * Erealloc(void *ptr, int size)
Definition: emalloc.cpp:38
void * Emalloc(int Size)
Definition: emalloc.cpp:31
CLUSTERCONFIG Config
float Angle
Definition: protos.h:42
float Y
Definition: protos.h:41
float B
Definition: protos.h:38
float A
Definition: protos.h:37
float C
Definition: protos.h:39
float X
Definition: protos.h:40
int16_t NumConfigs
Definition: protos.h:58
int16_t NumProtos
Definition: protos.h:55
CONFIGS Configurations
Definition: protos.h:60
int16_t MaxNumProtos
Definition: protos.h:56
int16_t MaxNumConfigs
Definition: protos.h:59
PROTO Prototypes
Definition: protos.h:57