| Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * cdjpeg.h |
| 3 | * |
| 4 | * Copyright (C) 1994, Thomas G. Lane. |
| 5 | * This file is part of the Independent JPEG Group's software. |
| 6 | * For conditions of distribution and use, see the accompanying README file. |
| 7 | * |
| 8 | * This file contains common declarations for the sample applications |
| 9 | * cjpeg and djpeg. It is NOT used by the core JPEG library. |
| 10 | */ |
| 11 | |
| 12 | #define JPEG_CJPEG_DJPEG /* define proper options in jconfig.h */ |
| 13 | #define JPEG_INTERNAL_OPTIONS /* cjpeg.c,djpeg.c need to see xxx_SUPPORTED */ |
| 14 | #include "jinclude.h" |
| 15 | #include "jpeglib.h" |
| 16 | #include "jerror.h" /* get library error codes too */ |
| 17 | #include "cderror.h" /* get application-specific error codes */ |
| 18 | |
| 19 | |
| 20 | /* |
| 21 | * Object interface for cjpeg's source file decoding modules |
| 22 | */ |
| 23 | |
| 24 | typedef struct cjpeg_source_struct * cjpeg_source_ptr; |
| 25 | |
| 26 | struct cjpeg_source_struct { |
| 27 | JMETHOD(void, start_input, (j_compress_ptr cinfo, |
| 28 | cjpeg_source_ptr sinfo)); |
| 29 | JMETHOD(JDIMENSION, get_pixel_rows, (j_compress_ptr cinfo, |
| 30 | cjpeg_source_ptr sinfo)); |
| 31 | JMETHOD(void, finish_input, (j_compress_ptr cinfo, |
| 32 | cjpeg_source_ptr sinfo)); |
| 33 | |
| 34 | FILE *input_file; |
| 35 | |
| 36 | JSAMPARRAY buffer; |
| 37 | JDIMENSION buffer_height; |
| 38 | }; |
| 39 | |
| 40 | |
| 41 | /* |
| 42 | * Object interface for djpeg's output file encoding modules |
| 43 | */ |
| 44 | |
| 45 | typedef struct djpeg_dest_struct * djpeg_dest_ptr; |
| 46 | |
| 47 | struct djpeg_dest_struct { |
| 48 | /* start_output is called after jpeg_start_decompress finishes. |
| 49 | * The color map will be ready at this time, if one is needed. |
| 50 | */ |
| 51 | JMETHOD(void, start_output, (j_decompress_ptr cinfo, |
| 52 | djpeg_dest_ptr dinfo)); |
| 53 | /* Emit the specified number of pixel rows from the buffer. */ |
| 54 | JMETHOD(void, put_pixel_rows, (j_decompress_ptr cinfo, |
| 55 | djpeg_dest_ptr dinfo, |
| 56 | JDIMENSION rows_supplied)); |
| 57 | /* Finish up at the end of the image. */ |
| 58 | JMETHOD(void, finish_output, (j_decompress_ptr cinfo, |
| 59 | djpeg_dest_ptr dinfo)); |
| 60 | |
| 61 | /* Target file spec; filled in by djpeg.c after object is created. */ |
| 62 | FILE * output_file; |
| 63 | |
| 64 | /* Output pixel-row buffer. Created by module init or start_output. |
| 65 | * Width is cinfo->output_width * cinfo->output_components; |
| 66 | * height is buffer_height. |
| 67 | */ |
| 68 | JSAMPARRAY buffer; |
| 69 | JDIMENSION buffer_height; |
| 70 | }; |
| 71 | |
| 72 | |
| 73 | /* |
| 74 | * cjpeg/djpeg may need to perform extra passes to convert to or from |
| 75 | * the source/destination file format. The JPEG library does not know |
| 76 | * about these passes, but we'd like them to be counted by the progress |
| 77 | * monitor. We use an expanded progress monitor object to hold the |
| 78 | * additional pass count. |
| 79 | */ |
| 80 | |
| 81 | struct cdjpeg_progress_mgr { |
| 82 | struct jpeg_progress_mgr pub; /* fields known to JPEG library */ |
| 83 | int completed_extra_passes; /* extra passes completed */ |
| 84 | int total_extra_passes; /* total extra */ |
| 85 | /* last printed percentage stored here to avoid multiple printouts */ |
| 86 | int percent_done; |
| 87 | }; |
| 88 | |
| 89 | typedef struct cdjpeg_progress_mgr * cd_progress_ptr; |
| 90 | |
| 91 | |
| 92 | /* Short forms of external names for systems with brain-damaged linkers. */ |
| 93 | |
| 94 | #ifdef NEED_SHORT_EXTERNAL_NAMES |
| 95 | #define jinit_read_bmp jIRdBMP |
| 96 | #define jinit_write_bmp jIWrBMP |
| 97 | #define jinit_read_gif jIRdGIF |
| 98 | #define jinit_write_gif jIWrGIF |
| 99 | #define jinit_read_ppm jIRdPPM |
| 100 | #define jinit_write_ppm jIWrPPM |
| 101 | #define jinit_read_rle jIRdRLE |
| 102 | #define jinit_write_rle jIWrRLE |
| 103 | #define jinit_read_targa jIRdTarga |
| 104 | #define jinit_write_targa jIWrTarga |
| 105 | #define read_color_map RdCMap |
| 106 | #endif /* NEED_SHORT_EXTERNAL_NAMES */ |
| 107 | |
| 108 | /* Module selection routines for I/O modules. */ |
| 109 | |
| 110 | EXTERN cjpeg_source_ptr jinit_read_bmp JPP((j_compress_ptr cinfo)); |
| 111 | EXTERN djpeg_dest_ptr jinit_write_bmp JPP((j_decompress_ptr cinfo, |
| 112 | boolean is_os2)); |
| 113 | EXTERN cjpeg_source_ptr jinit_read_gif JPP((j_compress_ptr cinfo)); |
| 114 | EXTERN djpeg_dest_ptr jinit_write_gif JPP((j_decompress_ptr cinfo)); |
| 115 | EXTERN cjpeg_source_ptr jinit_read_ppm JPP((j_compress_ptr cinfo)); |
| 116 | EXTERN djpeg_dest_ptr jinit_write_ppm JPP((j_decompress_ptr cinfo)); |
| 117 | EXTERN cjpeg_source_ptr jinit_read_rle JPP((j_compress_ptr cinfo)); |
| 118 | EXTERN djpeg_dest_ptr jinit_write_rle JPP((j_decompress_ptr cinfo)); |
| 119 | EXTERN cjpeg_source_ptr jinit_read_targa JPP((j_compress_ptr cinfo)); |
| 120 | EXTERN djpeg_dest_ptr jinit_write_targa JPP((j_decompress_ptr cinfo)); |
| 121 | |
| 122 | /* Other global routines */ |
| 123 | |
| 124 | EXTERN void read_color_map JPP((j_decompress_ptr cinfo, FILE * infile)); |