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