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1 /* |
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2 * cdjpeg.h |
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3 * |
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4 * Copyright (C) 1994-1997, Thomas G. Lane. |
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5 * This file is part of the Independent JPEG Group's software. |
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6 * For conditions of distribution and use, see the accompanying README file. |
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7 * |
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8 * This file contains common declarations for the sample applications |
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9 * cjpeg and djpeg. It is NOT used by the core JPEG library. |
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10 */ |
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11 |
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12 #define JPEG_CJPEG_DJPEG /* define proper options in jconfig.h */ |
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13 #define JPEG_INTERNAL_OPTIONS /* cjpeg.c,djpeg.c need to see xxx_SUPPORTED */ |
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14 #include "jinclude.h" |
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15 #include "jpeglib.h" |
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16 #include "jerror.h" /* get library error codes too */ |
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17 #include "cderror.h" /* get application-specific error codes */ |
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18 |
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19 |
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20 /* |
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21 * Object interface for cjpeg's source file decoding modules |
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22 */ |
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23 |
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24 typedef struct cjpeg_source_struct * cjpeg_source_ptr; |
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25 |
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26 struct cjpeg_source_struct { |
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27 JMETHOD(void, start_input, (j_compress_ptr cinfo, |
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28 cjpeg_source_ptr sinfo)); |
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29 JMETHOD(JDIMENSION, get_pixel_rows, (j_compress_ptr cinfo, |
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30 cjpeg_source_ptr sinfo)); |
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31 JMETHOD(void, finish_input, (j_compress_ptr cinfo, |
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32 cjpeg_source_ptr sinfo)); |
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33 |
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34 FILE *input_file; |
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35 |
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36 JSAMPARRAY buffer; |
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37 JDIMENSION buffer_height; |
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38 }; |
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39 |
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40 |
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41 /* |
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42 * Object interface for djpeg's output file encoding modules |
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43 */ |
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44 |
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45 typedef struct djpeg_dest_struct * djpeg_dest_ptr; |
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46 |
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47 struct djpeg_dest_struct { |
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48 /* start_output is called after jpeg_start_decompress finishes. |
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49 * The color map will be ready at this time, if one is needed. |
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50 */ |
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51 JMETHOD(void, start_output, (j_decompress_ptr cinfo, |
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52 djpeg_dest_ptr dinfo)); |
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53 /* Emit the specified number of pixel rows from the buffer. */ |
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54 JMETHOD(void, put_pixel_rows, (j_decompress_ptr cinfo, |
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55 djpeg_dest_ptr dinfo, |
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56 JDIMENSION rows_supplied)); |
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57 /* Finish up at the end of the image. */ |
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58 JMETHOD(void, finish_output, (j_decompress_ptr cinfo, |
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59 djpeg_dest_ptr dinfo)); |
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60 |
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61 /* Target file spec; filled in by djpeg.c after object is created. */ |
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62 FILE * output_file; |
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63 |
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64 /* Output pixel-row buffer. Created by module init or start_output. |
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65 * Width is cinfo->output_width * cinfo->output_components; |
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66 * height is buffer_height. |
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67 */ |
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68 JSAMPARRAY buffer; |
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69 JDIMENSION buffer_height; |
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70 }; |
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71 |
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72 |
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73 /* |
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74 * cjpeg/djpeg may need to perform extra passes to convert to or from |
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75 * the source/destination file format. The JPEG library does not know |
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76 * about these passes, but we'd like them to be counted by the progress |
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77 * monitor. We use an expanded progress monitor object to hold the |
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78 * additional pass count. |
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79 */ |
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80 |
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81 struct cdjpeg_progress_mgr { |
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82 struct jpeg_progress_mgr pub; /* fields known to JPEG library */ |
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83 int completed_extra_passes; /* extra passes completed */ |
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84 int total_extra_passes; /* total extra */ |
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85 /* last printed percentage stored here to avoid multiple printouts */ |
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86 int percent_done; |
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87 }; |
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88 |
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89 typedef struct cdjpeg_progress_mgr * cd_progress_ptr; |
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90 |
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91 |
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92 /* Short forms of external names for systems with brain-damaged linkers. */ |
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93 |
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94 #ifdef NEED_SHORT_EXTERNAL_NAMES |
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95 #define jinit_read_bmp jIRdBMP |
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96 #define jinit_write_bmp jIWrBMP |
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97 #define jinit_read_gif jIRdGIF |
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98 #define jinit_write_gif jIWrGIF |
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99 #define jinit_read_ppm jIRdPPM |
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100 #define jinit_write_ppm jIWrPPM |
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101 #define jinit_read_rle jIRdRLE |
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102 #define jinit_write_rle jIWrRLE |
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103 #define jinit_read_targa jIRdTarga |
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104 #define jinit_write_targa jIWrTarga |
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105 #define read_quant_tables RdQTables |
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106 #define read_scan_script RdScnScript |
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107 #define set_quality_ratings SetQRates |
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108 #define set_quant_slots SetQSlots |
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109 #define set_sample_factors SetSFacts |
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110 #define read_color_map RdCMap |
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111 #define enable_signal_catcher EnSigCatcher |
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112 #define start_progress_monitor StProgMon |
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113 #define end_progress_monitor EnProgMon |
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114 #define read_stdin RdStdin |
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115 #define write_stdout WrStdout |
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116 #endif /* NEED_SHORT_EXTERNAL_NAMES */ |
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117 |
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118 /* Module selection routines for I/O modules. */ |
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119 |
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120 EXTERN(cjpeg_source_ptr) jinit_read_bmp JPP((j_compress_ptr cinfo)); |
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121 EXTERN(djpeg_dest_ptr) jinit_write_bmp JPP((j_decompress_ptr cinfo, |
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122 boolean is_os2)); |
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123 EXTERN(cjpeg_source_ptr) jinit_read_gif JPP((j_compress_ptr cinfo)); |
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124 EXTERN(djpeg_dest_ptr) jinit_write_gif JPP((j_decompress_ptr cinfo)); |
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125 EXTERN(cjpeg_source_ptr) jinit_read_ppm JPP((j_compress_ptr cinfo)); |
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126 EXTERN(djpeg_dest_ptr) jinit_write_ppm JPP((j_decompress_ptr cinfo)); |
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127 EXTERN(cjpeg_source_ptr) jinit_read_rle JPP((j_compress_ptr cinfo)); |
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128 EXTERN(djpeg_dest_ptr) jinit_write_rle JPP((j_decompress_ptr cinfo)); |
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129 EXTERN(cjpeg_source_ptr) jinit_read_targa JPP((j_compress_ptr cinfo)); |
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130 EXTERN(djpeg_dest_ptr) jinit_write_targa JPP((j_decompress_ptr cinfo)); |
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131 |
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132 /* cjpeg support routines (in rdswitch.c) */ |
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133 |
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134 EXTERN(boolean) read_quant_tables JPP((j_compress_ptr cinfo, char * filename, |
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135 boolean force_baseline)); |
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136 EXTERN(boolean) read_scan_script JPP((j_compress_ptr cinfo, char * filename)); |
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137 EXTERN(boolean) set_quality_ratings JPP((j_compress_ptr cinfo, char *arg, |
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138 boolean force_baseline)); |
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139 EXTERN(boolean) set_quant_slots JPP((j_compress_ptr cinfo, char *arg)); |
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140 EXTERN(boolean) set_sample_factors JPP((j_compress_ptr cinfo, char *arg)); |
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141 |
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142 /* djpeg support routines (in rdcolmap.c) */ |
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143 |
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144 EXTERN(void) read_color_map JPP((j_decompress_ptr cinfo, FILE * infile)); |
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145 |
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146 /* common support routines (in cdjpeg.c) */ |
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147 |
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148 EXTERN(void) enable_signal_catcher JPP((j_common_ptr cinfo)); |
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149 EXTERN(void) start_progress_monitor JPP((j_common_ptr cinfo, |
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150 cd_progress_ptr progress)); |
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151 EXTERN(void) end_progress_monitor JPP((j_common_ptr cinfo)); |
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152 EXTERN(boolean) keymatch JPP((char * arg, const char * keyword, int minchars)); |
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153 EXTERN(FILE *) read_stdin JPP((void)); |
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154 EXTERN(FILE *) write_stdout JPP((void)); |
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155 |
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156 /* miscellaneous useful macros */ |
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157 |
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158 #ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */ |
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159 #define READ_BINARY "r" |
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160 #define WRITE_BINARY "w" |
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161 #else |
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162 #ifdef VMS /* VMS is very nonstandard */ |
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163 #define READ_BINARY "rb", "ctx=stm" |
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164 #define WRITE_BINARY "wb", "ctx=stm" |
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165 #else /* standard ANSI-compliant case */ |
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166 #define READ_BINARY "rb" |
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167 #define WRITE_BINARY "wb" |
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168 #endif |
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169 #endif |
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170 |
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171 #ifndef EXIT_FAILURE /* define exit() codes if not provided */ |
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172 #define EXIT_FAILURE 1 |
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173 #endif |
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174 #ifndef EXIT_SUCCESS |
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175 #ifdef VMS |
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176 #define EXIT_SUCCESS 1 /* VMS is very nonstandard */ |
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177 #else |
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178 #define EXIT_SUCCESS 0 |
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179 #endif |
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180 #endif |
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181 #ifndef EXIT_WARNING |
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182 #ifdef VMS |
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183 #define EXIT_WARNING 1 /* VMS is very nonstandard */ |
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184 #else |
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185 #define EXIT_WARNING 2 |
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186 #endif |
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187 #endif |