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* cdjpeg.h
* Copyright (C) 1994, 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));
FILE *input_file;
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. */
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.
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. */
#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_color_map RdCMap
/* 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));
/* Other global routines */
EXTERN void read_color_map JPP((j_decompress_ptr cinfo, FILE * infile));