/* | |
* cdjpeg.h | |
* | |
* Copyright (C) 1994-1997, Thomas G. Lane. | |
* This file is part of the Independent JPEG Group's software. | |
* For conditions of distribution and use, see the accompanying README file. | |
* | |
* This file contains common declarations for the sample applications | |
* cjpeg and djpeg. It is NOT used by the core JPEG library. | |
*/ | |
#define JPEG_CJPEG_DJPEG /* define proper options in jconfig.h */ | |
#define JPEG_INTERNAL_OPTIONS /* cjpeg.c,djpeg.c need to see xxx_SUPPORTED */ | |
#include "jinclude.h" | |
#include "jpeglib.h" | |
#include "jerror.h" /* get library error codes too */ | |
#include "cderror.h" /* get application-specific error codes */ | |
/* | |
* Object interface for cjpeg's source file decoding modules | |
*/ | |
typedef struct cjpeg_source_struct * cjpeg_source_ptr; | |
struct cjpeg_source_struct { | |
JMETHOD(void, start_input, (j_compress_ptr cinfo, | |
cjpeg_source_ptr sinfo)); | |
JMETHOD(JDIMENSION, get_pixel_rows, (j_compress_ptr cinfo, | |
cjpeg_source_ptr sinfo)); | |
JMETHOD(void, finish_input, (j_compress_ptr cinfo, | |
cjpeg_source_ptr sinfo)); | |
FXSYS_FILE *input_file; | |
JSAMPARRAY buffer; | |
JDIMENSION buffer_height; | |
}; | |
/* | |
* Object interface for djpeg's output file encoding modules | |
*/ | |
typedef struct djpeg_dest_struct * djpeg_dest_ptr; | |
struct djpeg_dest_struct { | |
/* start_output is called after jpeg_start_decompress finishes. | |
* The color map will be ready at this time, if one is needed. | |
*/ | |
JMETHOD(void, start_output, (j_decompress_ptr cinfo, | |
djpeg_dest_ptr dinfo)); | |
/* Emit the specified number of pixel rows from the buffer. */ | |
JMETHOD(void, put_pixel_rows, (j_decompress_ptr cinfo, | |
djpeg_dest_ptr dinfo, | |
JDIMENSION rows_supplied)); | |
/* Finish up at the end of the image. */ | |
JMETHOD(void, finish_output, (j_decompress_ptr cinfo, | |
djpeg_dest_ptr dinfo)); | |
/* Target file spec; filled in by djpeg.c after object is created. */ | |
FXSYS_FILE * output_file; | |
/* Output pixel-row buffer. Created by module init or start_output. | |
* Width is cinfo->output_width * cinfo->output_components; | |
* height is buffer_height. | |
*/ | |
JSAMPARRAY buffer; | |
JDIMENSION buffer_height; | |
}; | |
/* | |
* cjpeg/djpeg may need to perform extra passes to convert to or from | |
* the source/destination file format. The JPEG library does not know | |
* about these passes, but we'd like them to be counted by the progress | |
* monitor. We use an expanded progress monitor object to hold the | |
* additional pass count. | |
*/ | |
struct cdjpeg_progress_mgr { | |
struct jpeg_progress_mgr pub; /* fields known to JPEG library */ | |
int completed_extra_passes; /* extra passes completed */ | |
int total_extra_passes; /* total extra */ | |
/* last printed percentage stored here to avoid multiple printouts */ | |
int percent_done; | |
}; | |
typedef struct cdjpeg_progress_mgr * cd_progress_ptr; | |
/* Short forms of external names for systems with brain-damaged linkers. */ | |
#ifdef NEED_SHORT_EXTERNAL_NAMES | |
#define jinit_read_bmp jIRdBMP | |
#define jinit_write_bmp jIWrBMP | |
#define jinit_read_gif jIRdGIF | |
#define jinit_write_gif jIWrGIF | |
#define jinit_read_ppm jIRdPPM | |
#define jinit_write_ppm jIWrPPM | |
#define jinit_read_rle jIRdRLE | |
#define jinit_write_rle jIWrRLE | |
#define jinit_read_targa jIRdTarga | |
#define jinit_write_targa jIWrTarga | |
#define read_quant_tables RdQTables | |
#define read_scan_script RdScnScript | |
#define set_quant_slots SetQSlots | |
#define set_sample_factors SetSFacts | |
#define read_color_map RdCMap | |
#define enable_signal_catcher EnSigCatcher | |
#define start_progress_monitor StProgMon | |
#define end_progress_monitor EnProgMon | |
#define read_stdin RdStdin | |
#define write_stdout WrStdout | |
#endif /* NEED_SHORT_EXTERNAL_NAMES */ | |
/* Module selection routines for I/O modules. */ | |
EXTERN(cjpeg_source_ptr) jinit_read_bmp JPP((j_compress_ptr cinfo)); | |
EXTERN(djpeg_dest_ptr) jinit_write_bmp JPP((j_decompress_ptr cinfo, | |
boolean is_os2)); | |
EXTERN(cjpeg_source_ptr) jinit_read_gif JPP((j_compress_ptr cinfo)); | |
EXTERN(djpeg_dest_ptr) jinit_write_gif JPP((j_decompress_ptr cinfo)); | |
EXTERN(cjpeg_source_ptr) jinit_read_ppm JPP((j_compress_ptr cinfo)); | |
EXTERN(djpeg_dest_ptr) jinit_write_ppm JPP((j_decompress_ptr cinfo)); | |
EXTERN(cjpeg_source_ptr) jinit_read_rle JPP((j_compress_ptr cinfo)); | |
EXTERN(djpeg_dest_ptr) jinit_write_rle JPP((j_decompress_ptr cinfo)); | |
EXTERN(cjpeg_source_ptr) jinit_read_targa JPP((j_compress_ptr cinfo)); | |
EXTERN(djpeg_dest_ptr) jinit_write_targa JPP((j_decompress_ptr cinfo)); | |
/* cjpeg support routines (in rdswitch.c) */ | |
EXTERN(boolean) read_quant_tables JPP((j_compress_ptr cinfo, char * filename, | |
int scale_factor, boolean force_baseline)); | |
EXTERN(boolean) read_scan_script JPP((j_compress_ptr cinfo, char * filename)); | |
EXTERN(boolean) set_quant_slots JPP((j_compress_ptr cinfo, char *arg)); | |
EXTERN(boolean) set_sample_factors JPP((j_compress_ptr cinfo, char *arg)); | |
/* djpeg support routines (in rdcolmap.c) */ | |
EXTERN(void) read_color_map JPP((j_decompress_ptr cinfo, FXSYS_FILE * infile)); | |
/* common support routines (in cdjpeg.c) */ | |
EXTERN(void) enable_signal_catcher JPP((j_common_ptr cinfo)); | |
EXTERN(void) start_progress_monitor JPP((j_common_ptr cinfo, | |
cd_progress_ptr progress)); | |
EXTERN(void) end_progress_monitor JPP((j_common_ptr cinfo)); | |
EXTERN(boolean) keymatch JPP((char * arg, const char * keyword, int minchars)); | |
EXTERN(FXSYS_FILE *) read_stdin JPP((void)); | |
EXTERN(FXSYS_FILE *) write_stdout JPP((void)); | |
/* miscellaneous useful macros */ | |
#ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */ | |
#define READ_BINARY "r" | |
#define WRITE_BINARY "w" | |
#else | |
#ifdef VMS /* VMS is very nonstandard */ | |
#define READ_BINARY "rb", "ctx=stm" | |
#define WRITE_BINARY "wb", "ctx=stm" | |
#else /* standard ANSI-compliant case */ | |
#define READ_BINARY "rb" | |
#define WRITE_BINARY "wb" | |
#endif | |
#endif | |
#ifndef EXIT_FAILURE /* define exit() codes if not provided */ | |
#define EXIT_FAILURE 1 | |
#endif | |
#ifndef EXIT_SUCCESS | |
#ifdef VMS | |
#define EXIT_SUCCESS 1 /* VMS is very nonstandard */ | |
#else | |
#define EXIT_SUCCESS 0 | |
#endif | |
#endif | |
#ifndef EXIT_WARNING | |
#ifdef VMS | |
#define EXIT_WARNING 1 /* VMS is very nonstandard */ | |
#else | |
#define EXIT_WARNING 2 | |
#endif | |
#endif |