1 /* 2 * cdjpeg.h 3 * 4 * This file was part of the Independent JPEG Group's software: 5 * Copyright (C) 1994-1997, Thomas G. Lane. 6 * libjpeg-turbo Modifications: 7 * Copyright (C) 2017, D. R. Commander. 8 * For conditions of distribution and use, see the accompanying README.ijg 9 * file. 10 * 11 * This file contains common declarations for the sample applications 12 * cjpeg and djpeg. It is NOT used by the core JPEG library. 13 */ 14 15 #define JPEG_CJPEG_DJPEG /* define proper options in jconfig.h */ 16 #define JPEG_INTERNAL_OPTIONS /* cjpeg.c,djpeg.c need to see xxx_SUPPORTED */ 17 #include "jinclude.h" 18 #include "jpeglib.h" 19 #include "jerror.h" /* get library error codes too */ 20 #include "cderror.h" /* get application-specific error codes */ 21 22 23 /* 24 * Object interface for cjpeg's source file decoding modules 25 */ 26 27 typedef struct cjpeg_source_struct *cjpeg_source_ptr; 28 29 struct cjpeg_source_struct { 30 void (*start_input) (j_compress_ptr cinfo, cjpeg_source_ptr sinfo); 31 JDIMENSION (*get_pixel_rows) (j_compress_ptr cinfo, cjpeg_source_ptr sinfo); 32 void (*finish_input) (j_compress_ptr cinfo, 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 void (*start_output) (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo); 52 /* Emit the specified number of pixel rows from the buffer. */ 53 void (*put_pixel_rows) (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo, 54 JDIMENSION rows_supplied); 55 /* Finish up at the end of the image. */ 56 void (*finish_output) (j_decompress_ptr cinfo, djpeg_dest_ptr dinfo); 57 /* Re-calculate buffer dimensions based on output dimensions (for use with 58 partial image decompression.) If this is NULL, then the output format 59 does not support partial image decompression (BMP and RLE, in particular, 60 cannot support partial decompression because they use an inversion buffer 61 to write the image in bottom-up order.) */ 62 void (*calc_buffer_dimensions) (j_decompress_ptr cinfo, 63 djpeg_dest_ptr dinfo); 64 65 66 /* Target file spec; filled in by djpeg.c after object is created. */ 67 FILE *output_file; 68 69 /* Output pixel-row buffer. Created by module init or start_output. 70 * Width is cinfo->output_width * cinfo->output_components; 71 * height is buffer_height. 72 */ 73 JSAMPARRAY buffer; 74 JDIMENSION buffer_height; 75 }; 76 77 78 /* 79 * cjpeg/djpeg may need to perform extra passes to convert to or from 80 * the source/destination file format. The JPEG library does not know 81 * about these passes, but we'd like them to be counted by the progress 82 * monitor. We use an expanded progress monitor object to hold the 83 * additional pass count. 84 */ 85 86 struct cdjpeg_progress_mgr { 87 struct jpeg_progress_mgr pub; /* fields known to JPEG library */ 88 int completed_extra_passes; /* extra passes completed */ 89 int total_extra_passes; /* total extra */ 90 /* last printed percentage stored here to avoid multiple printouts */ 91 int percent_done; 92 }; 93 94 typedef struct cdjpeg_progress_mgr *cd_progress_ptr; 95 96 97 /* Module selection routines for I/O modules. */ 98 99 EXTERN(cjpeg_source_ptr) jinit_read_bmp(j_compress_ptr cinfo, 100 boolean use_inversion_array); 101 EXTERN(djpeg_dest_ptr) jinit_write_bmp(j_decompress_ptr cinfo, boolean is_os2, 102 boolean use_inversion_array); 103 EXTERN(cjpeg_source_ptr) jinit_read_gif(j_compress_ptr cinfo); 104 EXTERN(djpeg_dest_ptr) jinit_write_gif(j_decompress_ptr cinfo); 105 EXTERN(cjpeg_source_ptr) jinit_read_ppm(j_compress_ptr cinfo); 106 EXTERN(djpeg_dest_ptr) jinit_write_ppm(j_decompress_ptr cinfo); 107 EXTERN(cjpeg_source_ptr) jinit_read_rle(j_compress_ptr cinfo); 108 EXTERN(djpeg_dest_ptr) jinit_write_rle(j_decompress_ptr cinfo); 109 EXTERN(cjpeg_source_ptr) jinit_read_targa(j_compress_ptr cinfo); 110 EXTERN(djpeg_dest_ptr) jinit_write_targa(j_decompress_ptr cinfo); 111 112 /* cjpeg support routines (in rdswitch.c) */ 113 114 EXTERN(boolean) read_quant_tables(j_compress_ptr cinfo, char *filename, 115 boolean force_baseline); 116 EXTERN(boolean) read_scan_script(j_compress_ptr cinfo, char *filename); 117 EXTERN(boolean) set_quality_ratings(j_compress_ptr cinfo, char *arg, 118 boolean force_baseline); 119 EXTERN(boolean) set_quant_slots(j_compress_ptr cinfo, char *arg); 120 EXTERN(boolean) set_sample_factors(j_compress_ptr cinfo, char *arg); 121 122 /* djpeg support routines (in rdcolmap.c) */ 123 124 EXTERN(void) read_color_map(j_decompress_ptr cinfo, FILE *infile); 125 126 /* common support routines (in cdjpeg.c) */ 127 128 EXTERN(void) enable_signal_catcher(j_common_ptr cinfo); 129 EXTERN(void) start_progress_monitor(j_common_ptr cinfo, 130 cd_progress_ptr progress); 131 EXTERN(void) end_progress_monitor(j_common_ptr cinfo); 132 EXTERN(boolean) keymatch(char *arg, const char *keyword, int minchars); 133 EXTERN(FILE *) read_stdin(void); 134 EXTERN(FILE *) write_stdout(void); 135 136 /* miscellaneous useful macros */ 137 138 #ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */ 139 #define READ_BINARY "r" 140 #define WRITE_BINARY "w" 141 #else 142 #define READ_BINARY "rb" 143 #define WRITE_BINARY "wb" 144 #endif 145 146 #ifndef EXIT_FAILURE /* define exit() codes if not provided */ 147 #define EXIT_FAILURE 1 148 #endif 149 #ifndef EXIT_SUCCESS 150 #define EXIT_SUCCESS 0 151 #endif 152 #ifndef EXIT_WARNING 153 #define EXIT_WARNING 2 154 #endif 155 156 #define IsExtRGB(cs) \ 157 (cs == JCS_RGB || (cs >= JCS_EXT_RGB && cs <= JCS_EXT_ARGB)) 158