source: trunk/src/3rdparty/libjpeg/cdjpeg.h@ 953

Last change on this file since 953 was 846, checked in by Dmitry A. Kuminov, 15 years ago

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.
File size: 6.1 KB
Line 
1/*
2 * cdjpeg.h
3 *
4 * Copyright (C) 1994-1997, Thomas G. Lane.
5 * This file is part of the Independent JPEG Group's software.
6 * For conditions of distribution and use, see the accompanying README file.
7 *
8 * This file contains common declarations for the sample applications
9 * cjpeg and djpeg. It is NOT used by the core JPEG library.
10 */
11
12#define JPEG_CJPEG_DJPEG /* define proper options in jconfig.h */
13#define JPEG_INTERNAL_OPTIONS /* cjpeg.c,djpeg.c need to see xxx_SUPPORTED */
14#include "jinclude.h"
15#include "jpeglib.h"
16#include "jerror.h" /* get library error codes too */
17#include "cderror.h" /* get application-specific error codes */
18
19
20/*
21 * Object interface for cjpeg's source file decoding modules
22 */
23
24typedef struct cjpeg_source_struct * cjpeg_source_ptr;
25
26struct cjpeg_source_struct {
27 JMETHOD(void, start_input, (j_compress_ptr cinfo,
28 cjpeg_source_ptr sinfo));
29 JMETHOD(JDIMENSION, get_pixel_rows, (j_compress_ptr cinfo,
30 cjpeg_source_ptr sinfo));
31 JMETHOD(void, finish_input, (j_compress_ptr cinfo,
32 cjpeg_source_ptr sinfo));
33
34 FILE *input_file;
35
36 JSAMPARRAY buffer;
37 JDIMENSION buffer_height;
38};
39
40
41/*
42 * Object interface for djpeg's output file encoding modules
43 */
44
45typedef struct djpeg_dest_struct * djpeg_dest_ptr;
46
47struct djpeg_dest_struct {
48 /* start_output is called after jpeg_start_decompress finishes.
49 * The color map will be ready at this time, if one is needed.
50 */
51 JMETHOD(void, start_output, (j_decompress_ptr cinfo,
52 djpeg_dest_ptr dinfo));
53 /* Emit the specified number of pixel rows from the buffer. */
54 JMETHOD(void, put_pixel_rows, (j_decompress_ptr cinfo,
55 djpeg_dest_ptr dinfo,
56 JDIMENSION rows_supplied));
57 /* Finish up at the end of the image. */
58 JMETHOD(void, finish_output, (j_decompress_ptr cinfo,
59 djpeg_dest_ptr dinfo));
60
61 /* Target file spec; filled in by djpeg.c after object is created. */
62 FILE * output_file;
63
64 /* Output pixel-row buffer. Created by module init or start_output.
65 * Width is cinfo->output_width * cinfo->output_components;
66 * height is buffer_height.
67 */
68 JSAMPARRAY buffer;
69 JDIMENSION buffer_height;
70};
71
72
73/*
74 * cjpeg/djpeg may need to perform extra passes to convert to or from
75 * the source/destination file format. The JPEG library does not know
76 * about these passes, but we'd like them to be counted by the progress
77 * monitor. We use an expanded progress monitor object to hold the
78 * additional pass count.
79 */
80
81struct cdjpeg_progress_mgr {
82 struct jpeg_progress_mgr pub; /* fields known to JPEG library */
83 int completed_extra_passes; /* extra passes completed */
84 int total_extra_passes; /* total extra */
85 /* last printed percentage stored here to avoid multiple printouts */
86 int percent_done;
87};
88
89typedef struct cdjpeg_progress_mgr * cd_progress_ptr;
90
91
92/* Short forms of external names for systems with brain-damaged linkers. */
93
94#ifdef NEED_SHORT_EXTERNAL_NAMES
95#define jinit_read_bmp jIRdBMP
96#define jinit_write_bmp jIWrBMP
97#define jinit_read_gif jIRdGIF
98#define jinit_write_gif jIWrGIF
99#define jinit_read_ppm jIRdPPM
100#define jinit_write_ppm jIWrPPM
101#define jinit_read_rle jIRdRLE
102#define jinit_write_rle jIWrRLE
103#define jinit_read_targa jIRdTarga
104#define jinit_write_targa jIWrTarga
105#define read_quant_tables RdQTables
106#define read_scan_script RdScnScript
107#define set_quality_ratings SetQRates
108#define set_quant_slots SetQSlots
109#define set_sample_factors SetSFacts
110#define read_color_map RdCMap
111#define enable_signal_catcher EnSigCatcher
112#define start_progress_monitor StProgMon
113#define end_progress_monitor EnProgMon
114#define read_stdin RdStdin
115#define write_stdout WrStdout
116#endif /* NEED_SHORT_EXTERNAL_NAMES */
117
118/* Module selection routines for I/O modules. */
119
120EXTERN(cjpeg_source_ptr) jinit_read_bmp JPP((j_compress_ptr cinfo));
121EXTERN(djpeg_dest_ptr) jinit_write_bmp JPP((j_decompress_ptr cinfo,
122 boolean is_os2));
123EXTERN(cjpeg_source_ptr) jinit_read_gif JPP((j_compress_ptr cinfo));
124EXTERN(djpeg_dest_ptr) jinit_write_gif JPP((j_decompress_ptr cinfo));
125EXTERN(cjpeg_source_ptr) jinit_read_ppm JPP((j_compress_ptr cinfo));
126EXTERN(djpeg_dest_ptr) jinit_write_ppm JPP((j_decompress_ptr cinfo));
127EXTERN(cjpeg_source_ptr) jinit_read_rle JPP((j_compress_ptr cinfo));
128EXTERN(djpeg_dest_ptr) jinit_write_rle JPP((j_decompress_ptr cinfo));
129EXTERN(cjpeg_source_ptr) jinit_read_targa JPP((j_compress_ptr cinfo));
130EXTERN(djpeg_dest_ptr) jinit_write_targa JPP((j_decompress_ptr cinfo));
131
132/* cjpeg support routines (in rdswitch.c) */
133
134EXTERN(boolean) read_quant_tables JPP((j_compress_ptr cinfo, char * filename,
135 boolean force_baseline));
136EXTERN(boolean) read_scan_script JPP((j_compress_ptr cinfo, char * filename));
137EXTERN(boolean) set_quality_ratings JPP((j_compress_ptr cinfo, char *arg,
138 boolean force_baseline));
139EXTERN(boolean) set_quant_slots JPP((j_compress_ptr cinfo, char *arg));
140EXTERN(boolean) set_sample_factors JPP((j_compress_ptr cinfo, char *arg));
141
142/* djpeg support routines (in rdcolmap.c) */
143
144EXTERN(void) read_color_map JPP((j_decompress_ptr cinfo, FILE * infile));
145
146/* common support routines (in cdjpeg.c) */
147
148EXTERN(void) enable_signal_catcher JPP((j_common_ptr cinfo));
149EXTERN(void) start_progress_monitor JPP((j_common_ptr cinfo,
150 cd_progress_ptr progress));
151EXTERN(void) end_progress_monitor JPP((j_common_ptr cinfo));
152EXTERN(boolean) keymatch JPP((char * arg, const char * keyword, int minchars));
153EXTERN(FILE *) read_stdin JPP((void));
154EXTERN(FILE *) write_stdout JPP((void));
155
156/* miscellaneous useful macros */
157
158#ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */
159#define READ_BINARY "r"
160#define WRITE_BINARY "w"
161#else
162#ifdef VMS /* VMS is very nonstandard */
163#define READ_BINARY "rb", "ctx=stm"
164#define WRITE_BINARY "wb", "ctx=stm"
165#else /* standard ANSI-compliant case */
166#define READ_BINARY "rb"
167#define WRITE_BINARY "wb"
168#endif
169#endif
170
171#ifndef EXIT_FAILURE /* define exit() codes if not provided */
172#define EXIT_FAILURE 1
173#endif
174#ifndef EXIT_SUCCESS
175#ifdef VMS
176#define EXIT_SUCCESS 1 /* VMS is very nonstandard */
177#else
178#define EXIT_SUCCESS 0
179#endif
180#endif
181#ifndef EXIT_WARNING
182#ifdef VMS
183#define EXIT_WARNING 1 /* VMS is very nonstandard */
184#else
185#define EXIT_WARNING 2
186#endif
187#endif
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