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 
24 typedef struct cjpeg_source_struct * cjpeg_source_ptr;
25 
26 struct 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 
45 typedef struct djpeg_dest_struct * djpeg_dest_ptr;
46 
47 struct 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 
81 struct 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 
89 typedef 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_quant_slots		SetQSlots
108 #define set_sample_factors	SetSFacts
109 #define read_color_map		RdCMap
110 #define enable_signal_catcher	EnSigCatcher
111 #define start_progress_monitor	StProgMon
112 #define end_progress_monitor	EnProgMon
113 #define read_stdin		RdStdin
114 #define write_stdout		WrStdout
115 #endif /* NEED_SHORT_EXTERNAL_NAMES */
116 
117 /* Module selection routines for I/O modules. */
118 
119 EXTERN(cjpeg_source_ptr) jinit_read_bmp JPP((j_compress_ptr cinfo));
120 EXTERN(djpeg_dest_ptr) jinit_write_bmp JPP((j_decompress_ptr cinfo,
121 					    boolean is_os2));
122 EXTERN(cjpeg_source_ptr) jinit_read_gif JPP((j_compress_ptr cinfo));
123 EXTERN(djpeg_dest_ptr) jinit_write_gif JPP((j_decompress_ptr cinfo));
124 EXTERN(cjpeg_source_ptr) jinit_read_ppm JPP((j_compress_ptr cinfo));
125 EXTERN(djpeg_dest_ptr) jinit_write_ppm JPP((j_decompress_ptr cinfo));
126 EXTERN(cjpeg_source_ptr) jinit_read_rle JPP((j_compress_ptr cinfo));
127 EXTERN(djpeg_dest_ptr) jinit_write_rle JPP((j_decompress_ptr cinfo));
128 EXTERN(cjpeg_source_ptr) jinit_read_targa JPP((j_compress_ptr cinfo));
129 EXTERN(djpeg_dest_ptr) jinit_write_targa JPP((j_decompress_ptr cinfo));
130 
131 /* cjpeg support routines (in rdswitch.c) */
132 
133 EXTERN(boolean) read_quant_tables JPP((j_compress_ptr cinfo, char * filename,
134 				    int scale_factor, boolean force_baseline));
135 EXTERN(boolean) read_scan_script JPP((j_compress_ptr cinfo, char * filename));
136 EXTERN(boolean) set_quant_slots JPP((j_compress_ptr cinfo, char *arg));
137 EXTERN(boolean) set_sample_factors JPP((j_compress_ptr cinfo, char *arg));
138 
139 /* djpeg support routines (in rdcolmap.c) */
140 
141 EXTERN(void) read_color_map JPP((j_decompress_ptr cinfo, FILE * infile));
142 
143 /* common support routines (in cdjpeg.c) */
144 
145 EXTERN(void) enable_signal_catcher JPP((j_common_ptr cinfo));
146 EXTERN(void) start_progress_monitor JPP((j_common_ptr cinfo,
147 					 cd_progress_ptr progress));
148 EXTERN(void) end_progress_monitor JPP((j_common_ptr cinfo));
149 EXTERN(boolean) keymatch JPP((char * arg, const char * keyword, int minchars));
150 EXTERN(FILE *) read_stdin JPP((void));
151 EXTERN(FILE *) write_stdout JPP((void));
152 
153 /* miscellaneous useful macros */
154 
155 #ifdef DONT_USE_B_MODE		/* define mode parameters for fopen() */
156 #define READ_BINARY	"r"
157 #define WRITE_BINARY	"w"
158 #else
159 #ifdef VMS			/* VMS is very nonstandard */
160 #define READ_BINARY	"rb", "ctx=stm"
161 #define WRITE_BINARY	"wb", "ctx=stm"
162 #else				/* standard ANSI-compliant case */
163 #define READ_BINARY	"rb"
164 #define WRITE_BINARY	"wb"
165 #endif
166 #endif
167 
168 #ifndef EXIT_FAILURE		/* define exit() codes if not provided */
169 #define EXIT_FAILURE  1
170 #endif
171 #ifndef EXIT_SUCCESS
172 #ifdef VMS
173 #define EXIT_SUCCESS  1		/* VMS is very nonstandard */
174 #else
175 #define EXIT_SUCCESS  0
176 #endif
177 #endif
178 #ifndef EXIT_WARNING
179 #ifdef VMS
180 #define EXIT_WARNING  1		/* VMS is very nonstandard */
181 #else
182 #define EXIT_WARNING  2
183 #endif
184 #endif
185