Thomas G. Lane | 36a4ccc | 1994-09-24 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * jcparam.c |
| 3 | * |
| 4 | * Copyright (C) 1991-1994, 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 optional default-setting code for the JPEG compressor. |
| 9 | * Applications do not have to use this file, but those that don't use it |
| 10 | * must know a lot more about the innards of the JPEG code. |
| 11 | */ |
| 12 | |
| 13 | #define JPEG_INTERNALS |
| 14 | #include "jinclude.h" |
| 15 | #include "jpeglib.h" |
| 16 | |
| 17 | |
| 18 | /* |
| 19 | * Quantization table setup routines |
| 20 | */ |
| 21 | |
| 22 | GLOBAL void |
| 23 | jpeg_add_quant_table (j_compress_ptr cinfo, int which_tbl, |
| 24 | const unsigned int *basic_table, |
| 25 | int scale_factor, boolean force_baseline) |
| 26 | /* Define a quantization table equal to the basic_table times |
| 27 | * a scale factor (given as a percentage). |
| 28 | * If force_baseline is TRUE, the computed quantization table entries |
| 29 | * are limited to 1..255 for JPEG baseline compatibility. |
| 30 | */ |
| 31 | { |
| 32 | JQUANT_TBL ** qtblptr = & cinfo->quant_tbl_ptrs[which_tbl]; |
| 33 | int i; |
| 34 | long temp; |
| 35 | |
| 36 | /* Safety check to ensure start_compress not called yet. */ |
| 37 | if (cinfo->global_state != CSTATE_START) |
| 38 | ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state); |
| 39 | |
| 40 | if (*qtblptr == NULL) |
| 41 | *qtblptr = jpeg_alloc_quant_table((j_common_ptr) cinfo); |
| 42 | |
| 43 | for (i = 0; i < DCTSIZE2; i++) { |
| 44 | temp = ((long) basic_table[i] * scale_factor + 50L) / 100L; |
| 45 | /* limit the values to the valid range */ |
| 46 | if (temp <= 0L) temp = 1L; |
| 47 | if (temp > 32767L) temp = 32767L; /* max quantizer needed for 12 bits */ |
| 48 | if (force_baseline && temp > 255L) |
| 49 | temp = 255L; /* limit to baseline range if requested */ |
| 50 | (*qtblptr)->quantval[i] = (UINT16) temp; |
| 51 | } |
| 52 | |
| 53 | /* Initialize sent_table FALSE so table will be written to JPEG file. */ |
| 54 | (*qtblptr)->sent_table = FALSE; |
| 55 | } |
| 56 | |
| 57 | |
| 58 | GLOBAL void |
| 59 | jpeg_set_linear_quality (j_compress_ptr cinfo, int scale_factor, |
| 60 | boolean force_baseline) |
| 61 | /* Set or change the 'quality' (quantization) setting, using default tables |
| 62 | * and a straight percentage-scaling quality scale. In most cases it's better |
| 63 | * to use jpeg_set_quality (below); this entry point is provided for |
| 64 | * applications that insist on a linear percentage scaling. |
| 65 | */ |
| 66 | { |
| 67 | /* This is the sample quantization table given in the JPEG spec section K.1, |
| 68 | * but expressed in zigzag order (as are all of our quant. tables). |
| 69 | * The spec says that the values given produce "good" quality, and |
| 70 | * when divided by 2, "very good" quality. |
| 71 | */ |
| 72 | static const unsigned int std_luminance_quant_tbl[DCTSIZE2] = { |
| 73 | 16, 11, 12, 14, 12, 10, 16, 14, |
| 74 | 13, 14, 18, 17, 16, 19, 24, 40, |
| 75 | 26, 24, 22, 22, 24, 49, 35, 37, |
| 76 | 29, 40, 58, 51, 61, 60, 57, 51, |
| 77 | 56, 55, 64, 72, 92, 78, 64, 68, |
| 78 | 87, 69, 55, 56, 80, 109, 81, 87, |
| 79 | 95, 98, 103, 104, 103, 62, 77, 113, |
| 80 | 121, 112, 100, 120, 92, 101, 103, 99 |
| 81 | }; |
| 82 | static const unsigned int std_chrominance_quant_tbl[DCTSIZE2] = { |
| 83 | 17, 18, 18, 24, 21, 24, 47, 26, |
| 84 | 26, 47, 99, 66, 56, 66, 99, 99, |
| 85 | 99, 99, 99, 99, 99, 99, 99, 99, |
| 86 | 99, 99, 99, 99, 99, 99, 99, 99, |
| 87 | 99, 99, 99, 99, 99, 99, 99, 99, |
| 88 | 99, 99, 99, 99, 99, 99, 99, 99, |
| 89 | 99, 99, 99, 99, 99, 99, 99, 99, |
| 90 | 99, 99, 99, 99, 99, 99, 99, 99 |
| 91 | }; |
| 92 | |
| 93 | /* Set up two quantization tables using the specified scaling */ |
| 94 | jpeg_add_quant_table(cinfo, 0, std_luminance_quant_tbl, |
| 95 | scale_factor, force_baseline); |
| 96 | jpeg_add_quant_table(cinfo, 1, std_chrominance_quant_tbl, |
| 97 | scale_factor, force_baseline); |
| 98 | } |
| 99 | |
| 100 | |
| 101 | GLOBAL int |
| 102 | jpeg_quality_scaling (int quality) |
| 103 | /* Convert a user-specified quality rating to a percentage scaling factor |
| 104 | * for an underlying quantization table, using our recommended scaling curve. |
| 105 | * The input 'quality' factor should be 0 (terrible) to 100 (very good). |
| 106 | */ |
| 107 | { |
| 108 | /* Safety limit on quality factor. Convert 0 to 1 to avoid zero divide. */ |
| 109 | if (quality <= 0) quality = 1; |
| 110 | if (quality > 100) quality = 100; |
| 111 | |
| 112 | /* The basic table is used as-is (scaling 100) for a quality of 50. |
| 113 | * Qualities 50..100 are converted to scaling percentage 200 - 2*Q; |
| 114 | * note that at Q=100 the scaling is 0, which will cause j_add_quant_table |
| 115 | * to make all the table entries 1 (hence, no quantization loss). |
| 116 | * Qualities 1..50 are converted to scaling percentage 5000/Q. |
| 117 | */ |
| 118 | if (quality < 50) |
| 119 | quality = 5000 / quality; |
| 120 | else |
| 121 | quality = 200 - quality*2; |
| 122 | |
| 123 | return quality; |
| 124 | } |
| 125 | |
| 126 | |
| 127 | GLOBAL void |
| 128 | jpeg_set_quality (j_compress_ptr cinfo, int quality, boolean force_baseline) |
| 129 | /* Set or change the 'quality' (quantization) setting, using default tables. |
| 130 | * This is the standard quality-adjusting entry point for typical user |
| 131 | * interfaces; only those who want detailed control over quantization tables |
| 132 | * would use the preceding three routines directly. |
| 133 | */ |
| 134 | { |
| 135 | /* Convert user 0-100 rating to percentage scaling */ |
| 136 | quality = jpeg_quality_scaling(quality); |
| 137 | |
| 138 | /* Set up standard quality tables */ |
| 139 | jpeg_set_linear_quality(cinfo, quality, force_baseline); |
| 140 | } |
| 141 | |
| 142 | |
| 143 | /* |
| 144 | * Huffman table setup routines |
| 145 | */ |
| 146 | |
| 147 | LOCAL void |
| 148 | add_huff_table (j_compress_ptr cinfo, |
| 149 | JHUFF_TBL **htblptr, const UINT8 *bits, const UINT8 *val) |
| 150 | /* Define a Huffman table */ |
| 151 | { |
| 152 | if (*htblptr == NULL) |
| 153 | *htblptr = jpeg_alloc_huff_table((j_common_ptr) cinfo); |
| 154 | |
| 155 | MEMCOPY((*htblptr)->bits, bits, SIZEOF((*htblptr)->bits)); |
| 156 | MEMCOPY((*htblptr)->huffval, val, SIZEOF((*htblptr)->huffval)); |
| 157 | |
| 158 | /* Initialize sent_table FALSE so table will be written to JPEG file. */ |
| 159 | (*htblptr)->sent_table = FALSE; |
| 160 | } |
| 161 | |
| 162 | |
| 163 | LOCAL void |
| 164 | std_huff_tables (j_compress_ptr cinfo) |
| 165 | /* Set up the standard Huffman tables (cf. JPEG standard section K.3) */ |
| 166 | /* IMPORTANT: these are only valid for 8-bit data precision! */ |
| 167 | { |
| 168 | static const UINT8 bits_dc_luminance[17] = |
| 169 | { /* 0-base */ 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 }; |
| 170 | static const UINT8 val_dc_luminance[] = |
| 171 | { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 }; |
| 172 | |
| 173 | static const UINT8 bits_dc_chrominance[17] = |
| 174 | { /* 0-base */ 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 }; |
| 175 | static const UINT8 val_dc_chrominance[] = |
| 176 | { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 }; |
| 177 | |
| 178 | static const UINT8 bits_ac_luminance[17] = |
| 179 | { /* 0-base */ 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d }; |
| 180 | static const UINT8 val_ac_luminance[] = |
| 181 | { 0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, |
| 182 | 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07, |
| 183 | 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08, |
| 184 | 0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0, |
| 185 | 0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16, |
| 186 | 0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28, |
| 187 | 0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, |
| 188 | 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, |
| 189 | 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, |
| 190 | 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, |
| 191 | 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, |
| 192 | 0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, |
| 193 | 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, |
| 194 | 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, |
| 195 | 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, |
| 196 | 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5, |
| 197 | 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4, |
| 198 | 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2, |
| 199 | 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, |
| 200 | 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, |
| 201 | 0xf9, 0xfa }; |
| 202 | |
| 203 | static const UINT8 bits_ac_chrominance[17] = |
| 204 | { /* 0-base */ 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 }; |
| 205 | static const UINT8 val_ac_chrominance[] = |
| 206 | { 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, |
| 207 | 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71, |
| 208 | 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, |
| 209 | 0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0, |
| 210 | 0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34, |
| 211 | 0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26, |
| 212 | 0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38, |
| 213 | 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, |
| 214 | 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, |
| 215 | 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, |
| 216 | 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, |
| 217 | 0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, |
| 218 | 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, |
| 219 | 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, |
| 220 | 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, |
| 221 | 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, |
| 222 | 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, |
| 223 | 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, |
| 224 | 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, |
| 225 | 0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, |
| 226 | 0xf9, 0xfa }; |
| 227 | |
| 228 | add_huff_table(cinfo, &cinfo->dc_huff_tbl_ptrs[0], |
| 229 | bits_dc_luminance, val_dc_luminance); |
| 230 | add_huff_table(cinfo, &cinfo->ac_huff_tbl_ptrs[0], |
| 231 | bits_ac_luminance, val_ac_luminance); |
| 232 | add_huff_table(cinfo, &cinfo->dc_huff_tbl_ptrs[1], |
| 233 | bits_dc_chrominance, val_dc_chrominance); |
| 234 | add_huff_table(cinfo, &cinfo->ac_huff_tbl_ptrs[1], |
| 235 | bits_ac_chrominance, val_ac_chrominance); |
| 236 | } |
| 237 | |
| 238 | |
| 239 | /* |
| 240 | * Default parameter setup for compression. |
| 241 | * |
| 242 | * Applications that don't choose to use this routine must do their |
| 243 | * own setup of all these parameters. Alternately, you can call this |
| 244 | * to establish defaults and then alter parameters selectively. This |
| 245 | * is the recommended approach since, if we add any new parameters, |
| 246 | * your code will still work (they'll be set to reasonable defaults). |
| 247 | */ |
| 248 | |
| 249 | GLOBAL void |
| 250 | jpeg_set_defaults (j_compress_ptr cinfo) |
| 251 | { |
| 252 | int i; |
| 253 | |
| 254 | /* Safety check to ensure start_compress not called yet. */ |
| 255 | if (cinfo->global_state != CSTATE_START) |
| 256 | ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state); |
| 257 | |
| 258 | /* Allocate comp_info array large enough for maximum component count. |
| 259 | * Array is made permanent in case application wants to compress |
| 260 | * multiple images at same param settings. |
| 261 | */ |
| 262 | if (cinfo->comp_info == NULL) |
| 263 | cinfo->comp_info = (jpeg_component_info *) |
| 264 | (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT, |
| 265 | MAX_COMPONENTS * SIZEOF(jpeg_component_info)); |
| 266 | |
| 267 | /* Initialize everything not dependent on the color space */ |
| 268 | |
| 269 | cinfo->data_precision = BITS_IN_JSAMPLE; |
| 270 | /* Set up two quantization tables using default quality of 75 */ |
| 271 | jpeg_set_quality(cinfo, 75, TRUE); |
| 272 | /* Set up two Huffman tables */ |
| 273 | std_huff_tables(cinfo); |
| 274 | |
| 275 | /* Initialize default arithmetic coding conditioning */ |
| 276 | for (i = 0; i < NUM_ARITH_TBLS; i++) { |
| 277 | cinfo->arith_dc_L[i] = 0; |
| 278 | cinfo->arith_dc_U[i] = 1; |
| 279 | cinfo->arith_ac_K[i] = 5; |
| 280 | } |
| 281 | |
| 282 | /* Expect normal source image, not raw downsampled data */ |
| 283 | cinfo->raw_data_in = FALSE; |
| 284 | |
| 285 | /* Use Huffman coding, not arithmetic coding, by default */ |
| 286 | cinfo->arith_code = FALSE; |
| 287 | |
| 288 | /* Color images are interleaved by default */ |
| 289 | cinfo->interleave = TRUE; |
| 290 | |
| 291 | /* By default, don't do extra passes to optimize entropy coding */ |
| 292 | cinfo->optimize_coding = FALSE; |
| 293 | /* The standard Huffman tables are only valid for 8-bit data precision. |
| 294 | * If the precision is higher, force optimization on so that usable |
| 295 | * tables will be computed. This test can be removed if default tables |
| 296 | * are supplied that are valid for the desired precision. |
| 297 | */ |
| 298 | if (cinfo->data_precision > 8) |
| 299 | cinfo->optimize_coding = TRUE; |
| 300 | |
| 301 | /* By default, use the simpler non-cosited sampling alignment */ |
| 302 | cinfo->CCIR601_sampling = FALSE; |
| 303 | |
| 304 | /* No input smoothing */ |
| 305 | cinfo->smoothing_factor = 0; |
| 306 | |
| 307 | /* DCT algorithm preference */ |
| 308 | cinfo->dct_method = JDCT_DEFAULT; |
| 309 | |
| 310 | /* No restart markers */ |
| 311 | cinfo->restart_interval = 0; |
| 312 | cinfo->restart_in_rows = 0; |
| 313 | |
| 314 | /* Fill in default JFIF marker parameters. Note that whether the marker |
| 315 | * will actually be written is determined by jpeg_set_colorspace. |
| 316 | */ |
| 317 | cinfo->density_unit = 0; /* Pixel size is unknown by default */ |
| 318 | cinfo->X_density = 1; /* Pixel aspect ratio is square by default */ |
| 319 | cinfo->Y_density = 1; |
| 320 | |
| 321 | /* Choose JPEG colorspace based on input space, set defaults accordingly */ |
| 322 | |
| 323 | jpeg_default_colorspace(cinfo); |
| 324 | } |
| 325 | |
| 326 | |
| 327 | /* |
| 328 | * Select an appropriate JPEG colorspace for in_color_space. |
| 329 | */ |
| 330 | |
| 331 | GLOBAL void |
| 332 | jpeg_default_colorspace (j_compress_ptr cinfo) |
| 333 | { |
| 334 | switch (cinfo->in_color_space) { |
| 335 | case JCS_GRAYSCALE: |
| 336 | jpeg_set_colorspace(cinfo, JCS_GRAYSCALE); |
| 337 | break; |
| 338 | case JCS_RGB: |
| 339 | jpeg_set_colorspace(cinfo, JCS_YCbCr); |
| 340 | break; |
| 341 | case JCS_YCbCr: |
| 342 | jpeg_set_colorspace(cinfo, JCS_YCbCr); |
| 343 | break; |
| 344 | case JCS_CMYK: |
| 345 | jpeg_set_colorspace(cinfo, JCS_CMYK); /* By default, no translation */ |
| 346 | break; |
| 347 | case JCS_YCCK: |
| 348 | jpeg_set_colorspace(cinfo, JCS_YCCK); |
| 349 | break; |
| 350 | case JCS_UNKNOWN: |
| 351 | jpeg_set_colorspace(cinfo, JCS_UNKNOWN); |
| 352 | break; |
| 353 | default: |
| 354 | ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE); |
| 355 | } |
| 356 | } |
| 357 | |
| 358 | |
| 359 | /* |
| 360 | * Set the JPEG colorspace, and choose colorspace-dependent default values. |
| 361 | */ |
| 362 | |
| 363 | GLOBAL void |
| 364 | jpeg_set_colorspace (j_compress_ptr cinfo, J_COLOR_SPACE colorspace) |
| 365 | { |
| 366 | jpeg_component_info * compptr; |
| 367 | int ci; |
| 368 | |
| 369 | #define SET_COMP(index,id,hsamp,vsamp,quant,dctbl,actbl) \ |
| 370 | (compptr = &cinfo->comp_info[index], \ |
| 371 | compptr->component_index = (index), \ |
| 372 | compptr->component_id = (id), \ |
| 373 | compptr->h_samp_factor = (hsamp), \ |
| 374 | compptr->v_samp_factor = (vsamp), \ |
| 375 | compptr->quant_tbl_no = (quant), \ |
| 376 | compptr->dc_tbl_no = (dctbl), \ |
| 377 | compptr->ac_tbl_no = (actbl) ) |
| 378 | |
| 379 | /* Safety check to ensure start_compress not called yet. */ |
| 380 | if (cinfo->global_state != CSTATE_START) |
| 381 | ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state); |
| 382 | |
| 383 | /* For all colorspaces, we use Q and Huff tables 0 for luminance components, |
| 384 | * tables 1 for chrominance components. |
| 385 | */ |
| 386 | |
| 387 | cinfo->jpeg_color_space = colorspace; |
| 388 | |
| 389 | cinfo->write_JFIF_header = FALSE; /* No marker for non-JFIF colorspaces */ |
| 390 | cinfo->write_Adobe_marker = FALSE; /* write no Adobe marker by default */ |
| 391 | |
| 392 | switch (colorspace) { |
| 393 | case JCS_GRAYSCALE: |
| 394 | cinfo->write_JFIF_header = TRUE; /* Write a JFIF marker */ |
| 395 | cinfo->num_components = 1; |
| 396 | /* JFIF specifies component ID 1 */ |
| 397 | SET_COMP(0, 1, 1,1, 0, 0,0); |
| 398 | break; |
| 399 | case JCS_RGB: |
| 400 | cinfo->write_Adobe_marker = TRUE; /* write Adobe marker to flag RGB */ |
| 401 | cinfo->num_components = 3; |
| 402 | SET_COMP(0, 'R', 1,1, 0, 0,0); |
| 403 | SET_COMP(1, 'G', 1,1, 0, 0,0); |
| 404 | SET_COMP(2, 'B', 1,1, 0, 0,0); |
| 405 | break; |
| 406 | case JCS_YCbCr: |
| 407 | cinfo->write_JFIF_header = TRUE; /* Write a JFIF marker */ |
| 408 | cinfo->num_components = 3; |
| 409 | /* JFIF specifies component IDs 1,2,3 */ |
| 410 | /* We default to 2x2 subsamples of chrominance */ |
| 411 | SET_COMP(0, 1, 2,2, 0, 0,0); |
| 412 | SET_COMP(1, 2, 1,1, 1, 1,1); |
| 413 | SET_COMP(2, 3, 1,1, 1, 1,1); |
| 414 | break; |
| 415 | case JCS_CMYK: |
| 416 | cinfo->write_Adobe_marker = TRUE; /* write Adobe marker to flag CMYK */ |
| 417 | cinfo->num_components = 4; |
| 418 | SET_COMP(0, 'C', 1,1, 0, 0,0); |
| 419 | SET_COMP(1, 'M', 1,1, 0, 0,0); |
| 420 | SET_COMP(2, 'Y', 1,1, 0, 0,0); |
| 421 | SET_COMP(3, 'K', 1,1, 0, 0,0); |
| 422 | break; |
| 423 | case JCS_YCCK: |
| 424 | cinfo->write_Adobe_marker = TRUE; /* write Adobe marker to flag YCCK */ |
| 425 | cinfo->num_components = 4; |
| 426 | SET_COMP(0, 1, 2,2, 0, 0,0); |
| 427 | SET_COMP(1, 2, 1,1, 1, 1,1); |
| 428 | SET_COMP(2, 3, 1,1, 1, 1,1); |
| 429 | SET_COMP(3, 4, 2,2, 0, 0,0); |
| 430 | break; |
| 431 | case JCS_UNKNOWN: |
| 432 | cinfo->num_components = cinfo->input_components; |
| 433 | if (cinfo->num_components < 1 || cinfo->num_components > MAX_COMPONENTS) |
| 434 | ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->num_components, |
| 435 | MAX_COMPONENTS); |
| 436 | for (ci = 0; ci < cinfo->num_components; ci++) { |
| 437 | SET_COMP(ci, ci, 1,1, 0, 0,0); |
| 438 | } |
| 439 | break; |
| 440 | default: |
| 441 | ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); |
| 442 | } |
| 443 | } |