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comparison mupdf-source/thirdparty/tesseract/src/classify/featdefs.h @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1:1d09e1dec1d9 2:b50eed0cc0ef
1 /******************************************************************************
2 ** Filename: featdefs.h
3 ** Purpose: Definitions of currently defined feature types.
4 ** Author: Dan Johnson
5 **
6 ** (c) Copyright Hewlett-Packard Company, 1988.
7 ** Licensed under the Apache License, Version 2.0 (the "License");
8 ** you may not use this file except in compliance with the License.
9 ** You may obtain a copy of the License at
10 ** http://www.apache.org/licenses/LICENSE-2.0
11 ** Unless required by applicable law or agreed to in writing, software
12 ** distributed under the License is distributed on an "AS IS" BASIS,
13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 ** See the License for the specific language governing permissions and
15 ** limitations under the License.
16 ******************************************************************************/
17
18 #ifndef FEATDEFS_H
19 #define FEATDEFS_H
20
21 #include "ocrfeatures.h"
22
23 #include <array> // for std::array
24 #include <string> // for std::string
25
26 namespace tesseract {
27
28 /* Enumerate the different types of features currently defined. */
29 #define NUM_FEATURE_TYPES 4
30 extern TESS_API const char *const kMicroFeatureType;
31 extern TESS_API const char *const kCNFeatureType;
32 extern TESS_API const char *const kIntFeatureType;
33 extern TESS_API const char *const kGeoFeatureType;
34
35 /* A character is described by multiple sets of extracted features. Each
36 set contains a number of features of a particular type, for example, a
37 set of bays, or a set of closures, or a set of microfeatures. Each
38 feature consists of a number of parameters. All features within a
39 feature set contain the same number of parameters.*/
40
41 struct FEATURE_DEFS_STRUCT {
42 int32_t NumFeatureTypes;
43 const FEATURE_DESC_STRUCT *FeatureDesc[NUM_FEATURE_TYPES];
44 };
45 using FEATURE_DEFS = FEATURE_DEFS_STRUCT *;
46
47 struct CHAR_DESC_STRUCT {
48 /// Allocate a new character description, initialize its
49 /// feature sets to be empty, and return it.
50 CHAR_DESC_STRUCT(const FEATURE_DEFS_STRUCT &FeatureDefs) {
51 NumFeatureSets = FeatureDefs.NumFeatureTypes;
52 }
53
54 /// Release the memory consumed by the specified character
55 /// description and all of the features in that description.
56 ~CHAR_DESC_STRUCT() {
57 for (size_t i = 0; i < NumFeatureSets; i++) {
58 delete FeatureSets[i];
59 }
60 }
61
62 uint32_t NumFeatureSets;
63 std::array<FEATURE_SET_STRUCT *, NUM_FEATURE_TYPES> FeatureSets;
64 };
65
66 /*----------------------------------------------------------------------
67 Generic functions for manipulating character descriptions
68 ----------------------------------------------------------------------*/
69 TESS_API
70 void InitFeatureDefs(FEATURE_DEFS_STRUCT *featuredefs);
71
72 bool ValidCharDescription(const FEATURE_DEFS_STRUCT &FeatureDefs, CHAR_DESC_STRUCT *CharDesc);
73
74 void WriteCharDescription(const FEATURE_DEFS_STRUCT &FeatureDefs, CHAR_DESC_STRUCT *CharDesc, std::string &str);
75
76 TESS_API
77 CHAR_DESC_STRUCT *ReadCharDescription(const FEATURE_DEFS_STRUCT &FeatureDefs, FILE *File);
78
79 TESS_API
80 uint32_t ShortNameToFeatureType(const FEATURE_DEFS_STRUCT &FeatureDefs, const char *ShortName);
81
82 /**----------------------------------------------------------------------------
83 Global Data Definitions and Declarations
84 ----------------------------------------------------------------------------**/
85 extern const FEATURE_DESC_STRUCT MicroFeatureDesc;
86 extern TESS_API const FEATURE_DESC_STRUCT PicoFeatDesc;
87 extern const FEATURE_DESC_STRUCT CharNormDesc;
88 extern const FEATURE_DESC_STRUCT OutlineFeatDesc;
89 extern const FEATURE_DESC_STRUCT IntFeatDesc;
90 extern const FEATURE_DESC_STRUCT GeoFeatDesc;
91
92 } // namespace tesseract
93
94 #endif