ref: 556618eb07d1ac6e2c629a60acd53c45d53261be
dir: /sys/src/cmd/gs/jpeg/cdjpeg.h/
/* * 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)); 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_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, 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(FILE *) read_stdin JPP((void)); EXTERN(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