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comparison mupdf-source/thirdparty/libjpeg/cdjpeg.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 * cdjpeg.h
3 *
4 * Copyright (C) 1994-1997, Thomas G. Lane.
5 * Modified 2019 by Guido Vollbeding.
6 * This file is part of the Independent JPEG Group's software.
7 * For conditions of distribution and use, see the accompanying README file.
8 *
9 * This file contains common declarations for the sample applications
10 * cjpeg and djpeg. It is NOT used by the core JPEG library.
11 */
12
13 #define JPEG_CJPEG_DJPEG /* define proper options in jconfig.h */
14 #define JPEG_INTERNAL_OPTIONS /* cjpeg.c,djpeg.c need to see xxx_SUPPORTED */
15 #include "jinclude.h"
16 #include "jpeglib.h"
17 #include "jerror.h" /* get library error codes too */
18 #include "cderror.h" /* get application-specific error codes */
19
20
21 /*
22 * Object interface for cjpeg's source file decoding modules
23 */
24
25 typedef struct cjpeg_source_struct * cjpeg_source_ptr;
26
27 struct cjpeg_source_struct {
28 JMETHOD(void, start_input, (j_compress_ptr cinfo,
29 cjpeg_source_ptr sinfo));
30 JMETHOD(JDIMENSION, get_pixel_rows, (j_compress_ptr cinfo,
31 cjpeg_source_ptr sinfo));
32 JMETHOD(void, finish_input, (j_compress_ptr cinfo,
33 cjpeg_source_ptr sinfo));
34
35 FILE *input_file;
36
37 JSAMPARRAY buffer;
38 JDIMENSION buffer_height;
39 };
40
41
42 /*
43 * Object interface for djpeg's output file encoding modules
44 */
45
46 typedef struct djpeg_dest_struct * djpeg_dest_ptr;
47
48 struct djpeg_dest_struct {
49 /* start_output is called after jpeg_start_decompress finishes.
50 * The color map will be ready at this time, if one is needed.
51 */
52 JMETHOD(void, start_output, (j_decompress_ptr cinfo,
53 djpeg_dest_ptr dinfo));
54 /* Emit the specified number of pixel rows from the buffer. */
55 JMETHOD(void, put_pixel_rows, (j_decompress_ptr cinfo,
56 djpeg_dest_ptr dinfo,
57 JDIMENSION rows_supplied));
58 /* Finish up at the end of the image. */
59 JMETHOD(void, finish_output, (j_decompress_ptr cinfo,
60 djpeg_dest_ptr dinfo));
61
62 /* Target file spec; filled in by djpeg.c after object is created. */
63 FILE * output_file;
64
65 /* Output pixel-row buffer. Created by module init or start_output.
66 * Width is cinfo->output_width * cinfo->output_components;
67 * height is buffer_height.
68 */
69 JSAMPARRAY buffer;
70 JDIMENSION buffer_height;
71 };
72
73
74 /*
75 * cjpeg/djpeg may need to perform extra passes to convert to or from
76 * the source/destination file format. The JPEG library does not know
77 * about these passes, but we'd like them to be counted by the progress
78 * monitor. We use an expanded progress monitor object to hold the
79 * additional pass count.
80 */
81
82 struct cdjpeg_progress_mgr {
83 struct jpeg_progress_mgr pub; /* fields known to JPEG library */
84 int completed_extra_passes; /* extra passes completed */
85 int total_extra_passes; /* total extra */
86 /* last printed percentage stored here to avoid multiple printouts */
87 int percent_done;
88 };
89
90 typedef struct cdjpeg_progress_mgr * cd_progress_ptr;
91
92
93 /* Short forms of external names for systems with brain-damaged linkers. */
94
95 #ifdef NEED_SHORT_EXTERNAL_NAMES
96 #define jinit_read_bmp jIRdBMP
97 #define jinit_write_bmp jIWrBMP
98 #define jinit_read_gif jIRdGIF
99 #define jinit_write_gif jIWrGIF
100 #define jinit_read_ppm jIRdPPM
101 #define jinit_write_ppm jIWrPPM
102 #define jinit_read_rle jIRdRLE
103 #define jinit_write_rle jIWrRLE
104 #define jinit_read_targa jIRdTarga
105 #define jinit_write_targa jIWrTarga
106 #define read_quant_tables RdQTables
107 #define read_scan_script RdScnScript
108 #define set_quality_ratings SetQRates
109 #define set_quant_slots SetQSlots
110 #define set_sample_factors SetSFacts
111 #define read_color_map RdCMap
112 #define enable_signal_catcher EnSigCatcher
113 #define start_progress_monitor StProgMon
114 #define end_progress_monitor EnProgMon
115 #define read_stdin RdStdin
116 #define write_stdout WrStdout
117 #endif /* NEED_SHORT_EXTERNAL_NAMES */
118
119 /* Module selection routines for I/O modules. */
120
121 EXTERN(cjpeg_source_ptr) jinit_read_bmp JPP((j_compress_ptr cinfo));
122 EXTERN(djpeg_dest_ptr) jinit_write_bmp JPP((j_decompress_ptr cinfo,
123 boolean is_os2));
124 EXTERN(cjpeg_source_ptr) jinit_read_gif JPP((j_compress_ptr cinfo));
125 EXTERN(djpeg_dest_ptr) jinit_write_gif JPP((j_decompress_ptr cinfo,
126 boolean is_lzw));
127 EXTERN(cjpeg_source_ptr) jinit_read_ppm JPP((j_compress_ptr cinfo));
128 EXTERN(djpeg_dest_ptr) jinit_write_ppm JPP((j_decompress_ptr cinfo));
129 EXTERN(cjpeg_source_ptr) jinit_read_rle JPP((j_compress_ptr cinfo));
130 EXTERN(djpeg_dest_ptr) jinit_write_rle JPP((j_decompress_ptr cinfo));
131 EXTERN(cjpeg_source_ptr) jinit_read_targa JPP((j_compress_ptr cinfo));
132 EXTERN(djpeg_dest_ptr) jinit_write_targa JPP((j_decompress_ptr cinfo));
133
134 /* cjpeg support routines (in rdswitch.c) */
135
136 EXTERN(boolean) read_quant_tables JPP((j_compress_ptr cinfo, char * filename,
137 boolean force_baseline));
138 EXTERN(boolean) read_scan_script JPP((j_compress_ptr cinfo, char * filename));
139 EXTERN(boolean) set_quality_ratings JPP((j_compress_ptr cinfo, char *arg,
140 boolean force_baseline));
141 EXTERN(boolean) set_quant_slots JPP((j_compress_ptr cinfo, char *arg));
142 EXTERN(boolean) set_sample_factors JPP((j_compress_ptr cinfo, char *arg));
143
144 /* djpeg support routines (in rdcolmap.c) */
145
146 EXTERN(void) read_color_map JPP((j_decompress_ptr cinfo, FILE * infile));
147
148 /* common support routines (in cdjpeg.c) */
149
150 EXTERN(void) enable_signal_catcher JPP((j_common_ptr cinfo));
151 EXTERN(void) start_progress_monitor JPP((j_common_ptr cinfo,
152 cd_progress_ptr progress));
153 EXTERN(void) end_progress_monitor JPP((j_common_ptr cinfo));
154 EXTERN(boolean) keymatch JPP((char * arg, const char * keyword, int minchars));
155 EXTERN(FILE *) read_stdin JPP((void));
156 EXTERN(FILE *) write_stdout JPP((void));
157
158 /* miscellaneous useful macros */
159
160 #ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */
161 #define READ_BINARY "r"
162 #define WRITE_BINARY "w"
163 #else
164 #ifdef VMS /* VMS is very nonstandard */
165 #define READ_BINARY "rb", "ctx=stm"
166 #define WRITE_BINARY "wb", "ctx=stm"
167 #else /* standard ANSI-compliant case */
168 #define READ_BINARY "rb"
169 #define WRITE_BINARY "wb"
170 #endif
171 #endif
172
173 #ifndef EXIT_FAILURE /* define exit() codes if not provided */
174 #define EXIT_FAILURE 1
175 #endif
176 #ifndef EXIT_SUCCESS
177 #ifdef VMS
178 #define EXIT_SUCCESS 1 /* VMS is very nonstandard */
179 #else
180 #define EXIT_SUCCESS 0
181 #endif
182 #endif
183 #ifndef EXIT_WARNING
184 #ifdef VMS
185 #define EXIT_WARNING 1 /* VMS is very nonstandard */
186 #else
187 #define EXIT_WARNING 2
188 #endif
189 #endif