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comparison mupdf-source/thirdparty/jbig2dec/jbig2.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 /* Copyright (C) 2001-2023 Artifex Software, Inc.
2 All Rights Reserved.
3
4 This software is provided AS-IS with no warranty, either express or
5 implied.
6
7 This software is distributed under license and may not be copied,
8 modified or distributed except as expressly authorized under the terms
9 of the license contained in the file LICENSE in this distribution.
10
11 Refer to licensing information at http://www.artifex.com or contact
12 Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
13 CA 94129, USA, for further information.
14 */
15
16 /*
17 jbig2dec
18 */
19
20 #ifndef _JBIG2_H
21 #define _JBIG2_H
22
23 #ifdef __cplusplus
24 extern "C"
25 {
26 #endif
27
28 #define JBIG2_VERSION_MAJOR (0)
29 #define JBIG2_VERSION_MINOR (20)
30
31 /* warning levels */
32 typedef enum {
33 JBIG2_SEVERITY_DEBUG,
34 JBIG2_SEVERITY_INFO,
35 JBIG2_SEVERITY_WARNING,
36 JBIG2_SEVERITY_FATAL
37 } Jbig2Severity;
38
39 typedef enum {
40 JBIG2_OPTIONS_EMBEDDED = 1
41 } Jbig2Options;
42
43 /* forward public structure declarations */
44 typedef struct _Jbig2Allocator Jbig2Allocator;
45 typedef struct _Jbig2Ctx Jbig2Ctx;
46 typedef struct _Jbig2GlobalCtx Jbig2GlobalCtx;
47
48 /*
49 this is the general image structure used by the jbig2dec library
50 images are 1 bpp, packed into rows a byte at a time. stride gives
51 the byte offset to the next row, while width and height define
52 the size of the image area in pixels.
53 */
54 typedef struct _Jbig2Image Jbig2Image;
55 struct _Jbig2Image {
56 uint32_t width;
57 uint32_t height;
58 uint32_t stride;
59 uint8_t *data;
60 int refcount;
61 };
62
63 /* errors are returned from the library via a callback. If no callback
64 is provided (a NULL argument is passed to jbig2_ctx_new) a default
65 handler is used which prints fatal errors to the stderr stream. */
66
67 /* error callback */
68 #define JBIG2_UNKNOWN_SEGMENT_NUMBER ~0U
69 typedef void (*Jbig2ErrorCallback)(void *data, const char *msg, Jbig2Severity severity, uint32_t seg_idx);
70
71 /* memory allocation is likewise done via a set of callbacks so that
72 clients can better control memory usage. If a NULL is passed for
73 this argument of jbig2_ctx_new, a default allocator based on malloc()
74 is used. */
75
76 /* dynamic memory callbacks */
77 struct _Jbig2Allocator {
78 void *(*alloc)(Jbig2Allocator *allocator, size_t size);
79 void (*free)(Jbig2Allocator *allocator, void *p);
80 void *(*realloc)(Jbig2Allocator *allocator, void *p, size_t size);
81 };
82
83 /* decoder context */
84 #define jbig2_ctx_new(allocator, options, global_ctx, error_callback, error_callback_data) jbig2_ctx_new_imp((allocator), (options), (global_ctx), (error_callback), (error_callback_data), JBIG2_VERSION_MAJOR, JBIG2_VERSION_MINOR)
85 Jbig2Ctx *jbig2_ctx_new_imp(Jbig2Allocator *allocator,
86 Jbig2Options options,
87 Jbig2GlobalCtx *global_ctx,
88 Jbig2ErrorCallback error_callback,
89 void *error_callback_data,
90 int jbig2_version_major,
91 int jbig2_version_minor);
92 Jbig2Allocator *jbig2_ctx_free(Jbig2Ctx *ctx);
93
94 /* global context for embedded streams */
95 Jbig2GlobalCtx *jbig2_make_global_ctx(Jbig2Ctx *ctx);
96 Jbig2Allocator *jbig2_global_ctx_free(Jbig2GlobalCtx *global_ctx);
97
98 /* submit data to the decoder */
99 int jbig2_data_in(Jbig2Ctx *ctx, const unsigned char *data, size_t size);
100
101 /* get the next available decoded page image. NULL means there isn't one. */
102 Jbig2Image *jbig2_page_out(Jbig2Ctx *ctx);
103 /* mark a returned page image as no longer needed. */
104 void jbig2_release_page(Jbig2Ctx *ctx, Jbig2Image *image);
105 /* mark the current page as complete, simulating an end-of-page segment (for broken streams) */
106 int jbig2_complete_page(Jbig2Ctx *ctx);
107
108 #ifdef __cplusplus
109 }
110 #endif
111
112 #endif /* _JBIG2_H */