| /* |
| * 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)); |