text: /*
   * 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;
  
    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. */
    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_color_map		RdCMap
  #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));
  
  /* Other global routines */
  
  EXTERN void read_color_map JPP((j_decompress_ptr cinfo, FILE * infile));
  