1 /* 2 * jccolor.c 3 * 4 * This file was part of the Independent JPEG Group's software: 5 * Copyright (C) 1991-1996, Thomas G. Lane. 6 * libjpeg-turbo Modifications: 7 * Copyright 2009 Pierre Ossman <ossman (at) cendio.se> for Cendio AB 8 * Copyright (C) 2009-2012, 2015 D. R. Commander. 9 * Copyright (C) 2014, MIPS Technologies, Inc., California 10 * For conditions of distribution and use, see the accompanying README file. 11 * 12 * This file contains input colorspace conversion routines. 13 */ 14 15 #define JPEG_INTERNALS 16 #include "jinclude.h" 17 #include "jpeglib.h" 18 #include "jsimd.h" 19 #include "jconfigint.h" 20 21 22 /* Private subobject */ 23 24 typedef struct { 25 struct jpeg_color_converter pub; /* public fields */ 26 27 /* Private state for RGB->YCC conversion */ 28 INT32 * rgb_ycc_tab; /* => table for RGB to YCbCr conversion */ 29 } my_color_converter; 30 31 typedef my_color_converter * my_cconvert_ptr; 32 33 34 /**************** RGB -> YCbCr conversion: most common case **************/ 35 36 /* 37 * YCbCr is defined per CCIR 601-1, except that Cb and Cr are 38 * normalized to the range 0..MAXJSAMPLE rather than -0.5 .. 0.5. 39 * The conversion equations to be implemented are therefore 40 * Y = 0.29900 * R + 0.58700 * G + 0.11400 * B 41 * Cb = -0.16874 * R - 0.33126 * G + 0.50000 * B + CENTERJSAMPLE 42 * Cr = 0.50000 * R - 0.41869 * G - 0.08131 * B + CENTERJSAMPLE 43 * (These numbers are derived from TIFF 6.0 section 21, dated 3-June-92.) 44 * Note: older versions of the IJG code used a zero offset of MAXJSAMPLE/2, 45 * rather than CENTERJSAMPLE, for Cb and Cr. This gave equal positive and 46 * negative swings for Cb/Cr, but meant that grayscale values (Cb=Cr=0) 47 * were not represented exactly. Now we sacrifice exact representation of 48 * maximum red and maximum blue in order to get exact grayscales. 49 * 50 * To avoid floating-point arithmetic, we represent the fractional constants 51 * as integers scaled up by 2^16 (about 4 digits precision); we have to divide 52 * the products by 2^16, with appropriate rounding, to get the correct answer. 53 * 54 * For even more speed, we avoid doing any multiplications in the inner loop 55 * by precalculating the constants times R,G,B for all possible values. 56 * For 8-bit JSAMPLEs this is very reasonable (only 256 entries per table); 57 * for 12-bit samples it is still acceptable. It's not very reasonable for 58 * 16-bit samples, but if you want lossless storage you shouldn't be changing 59 * colorspace anyway. 60 * The CENTERJSAMPLE offsets and the rounding fudge-factor of 0.5 are included 61 * in the tables to save adding them separately in the inner loop. 62 */ 63 64 #define SCALEBITS 16 /* speediest right-shift on some machines */ 65 #define CBCR_OFFSET ((INT32) CENTERJSAMPLE << SCALEBITS) 66 #define ONE_HALF ((INT32) 1 << (SCALEBITS-1)) 67 #define FIX(x) ((INT32) ((x) * (1L<<SCALEBITS) + 0.5)) 68 69 /* We allocate one big table and divide it up into eight parts, instead of 70 * doing eight alloc_small requests. This lets us use a single table base 71 * address, which can be held in a register in the inner loops on many 72 * machines (more than can hold all eight addresses, anyway). 73 */ 74 75 #define R_Y_OFF 0 /* offset to R => Y section */ 76 #define G_Y_OFF (1*(MAXJSAMPLE+1)) /* offset to G => Y section */ 77 #define B_Y_OFF (2*(MAXJSAMPLE+1)) /* etc. */ 78 #define R_CB_OFF (3*(MAXJSAMPLE+1)) 79 #define G_CB_OFF (4*(MAXJSAMPLE+1)) 80 #define B_CB_OFF (5*(MAXJSAMPLE+1)) 81 #define R_CR_OFF B_CB_OFF /* B=>Cb, R=>Cr are the same */ 82 #define G_CR_OFF (6*(MAXJSAMPLE+1)) 83 #define B_CR_OFF (7*(MAXJSAMPLE+1)) 84 #define TABLE_SIZE (8*(MAXJSAMPLE+1)) 85 86 87 /* Include inline routines for colorspace extensions */ 88 89 #include "jccolext.c" 90 #undef RGB_RED 91 #undef RGB_GREEN 92 #undef RGB_BLUE 93 #undef RGB_PIXELSIZE 94 95 #define RGB_RED EXT_RGB_RED 96 #define RGB_GREEN EXT_RGB_GREEN 97 #define RGB_BLUE EXT_RGB_BLUE 98 #define RGB_PIXELSIZE EXT_RGB_PIXELSIZE 99 #define rgb_ycc_convert_internal extrgb_ycc_convert_internal 100 #define rgb_gray_convert_internal extrgb_gray_convert_internal 101 #define rgb_rgb_convert_internal extrgb_rgb_convert_internal 102 #include "jccolext.c" 103 #undef RGB_RED 104 #undef RGB_GREEN 105 #undef RGB_BLUE 106 #undef RGB_PIXELSIZE 107 #undef rgb_ycc_convert_internal 108 #undef rgb_gray_convert_internal 109 #undef rgb_rgb_convert_internal 110 111 #define RGB_RED EXT_RGBX_RED 112 #define RGB_GREEN EXT_RGBX_GREEN 113 #define RGB_BLUE EXT_RGBX_BLUE 114 #define RGB_PIXELSIZE EXT_RGBX_PIXELSIZE 115 #define rgb_ycc_convert_internal extrgbx_ycc_convert_internal 116 #define rgb_gray_convert_internal extrgbx_gray_convert_internal 117 #define rgb_rgb_convert_internal extrgbx_rgb_convert_internal 118 #include "jccolext.c" 119 #undef RGB_RED 120 #undef RGB_GREEN 121 #undef RGB_BLUE 122 #undef RGB_PIXELSIZE 123 #undef rgb_ycc_convert_internal 124 #undef rgb_gray_convert_internal 125 #undef rgb_rgb_convert_internal 126 127 #define RGB_RED EXT_BGR_RED 128 #define RGB_GREEN EXT_BGR_GREEN 129 #define RGB_BLUE EXT_BGR_BLUE 130 #define RGB_PIXELSIZE EXT_BGR_PIXELSIZE 131 #define rgb_ycc_convert_internal extbgr_ycc_convert_internal 132 #define rgb_gray_convert_internal extbgr_gray_convert_internal 133 #define rgb_rgb_convert_internal extbgr_rgb_convert_internal 134 #include "jccolext.c" 135 #undef RGB_RED 136 #undef RGB_GREEN 137 #undef RGB_BLUE 138 #undef RGB_PIXELSIZE 139 #undef rgb_ycc_convert_internal 140 #undef rgb_gray_convert_internal 141 #undef rgb_rgb_convert_internal 142 143 #define RGB_RED EXT_BGRX_RED 144 #define RGB_GREEN EXT_BGRX_GREEN 145 #define RGB_BLUE EXT_BGRX_BLUE 146 #define RGB_PIXELSIZE EXT_BGRX_PIXELSIZE 147 #define rgb_ycc_convert_internal extbgrx_ycc_convert_internal 148 #define rgb_gray_convert_internal extbgrx_gray_convert_internal 149 #define rgb_rgb_convert_internal extbgrx_rgb_convert_internal 150 #include "jccolext.c" 151 #undef RGB_RED 152 #undef RGB_GREEN 153 #undef RGB_BLUE 154 #undef RGB_PIXELSIZE 155 #undef rgb_ycc_convert_internal 156 #undef rgb_gray_convert_internal 157 #undef rgb_rgb_convert_internal 158 159 #define RGB_RED EXT_XBGR_RED 160 #define RGB_GREEN EXT_XBGR_GREEN 161 #define RGB_BLUE EXT_XBGR_BLUE 162 #define RGB_PIXELSIZE EXT_XBGR_PIXELSIZE 163 #define rgb_ycc_convert_internal extxbgr_ycc_convert_internal 164 #define rgb_gray_convert_internal extxbgr_gray_convert_internal 165 #define rgb_rgb_convert_internal extxbgr_rgb_convert_internal 166 #include "jccolext.c" 167 #undef RGB_RED 168 #undef RGB_GREEN 169 #undef RGB_BLUE 170 #undef RGB_PIXELSIZE 171 #undef rgb_ycc_convert_internal 172 #undef rgb_gray_convert_internal 173 #undef rgb_rgb_convert_internal 174 175 #define RGB_RED EXT_XRGB_RED 176 #define RGB_GREEN EXT_XRGB_GREEN 177 #define RGB_BLUE EXT_XRGB_BLUE 178 #define RGB_PIXELSIZE EXT_XRGB_PIXELSIZE 179 #define rgb_ycc_convert_internal extxrgb_ycc_convert_internal 180 #define rgb_gray_convert_internal extxrgb_gray_convert_internal 181 #define rgb_rgb_convert_internal extxrgb_rgb_convert_internal 182 #include "jccolext.c" 183 #undef RGB_RED 184 #undef RGB_GREEN 185 #undef RGB_BLUE 186 #undef RGB_PIXELSIZE 187 #undef rgb_ycc_convert_internal 188 #undef rgb_gray_convert_internal 189 #undef rgb_rgb_convert_internal 190 191 192 /* 193 * Initialize for RGB->YCC colorspace conversion. 194 */ 195 196 METHODDEF(void) 197 rgb_ycc_start (j_compress_ptr cinfo) 198 { 199 my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert; 200 INT32 * rgb_ycc_tab; 201 INT32 i; 202 203 /* Allocate and fill in the conversion tables. */ 204 cconvert->rgb_ycc_tab = rgb_ycc_tab = (INT32 *) 205 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, 206 (TABLE_SIZE * sizeof(INT32))); 207 208 for (i = 0; i <= MAXJSAMPLE; i++) { 209 rgb_ycc_tab[i+R_Y_OFF] = FIX(0.29900) * i; 210 rgb_ycc_tab[i+G_Y_OFF] = FIX(0.58700) * i; 211 rgb_ycc_tab[i+B_Y_OFF] = FIX(0.11400) * i + ONE_HALF; 212 rgb_ycc_tab[i+R_CB_OFF] = (-FIX(0.16874)) * i; 213 rgb_ycc_tab[i+G_CB_OFF] = (-FIX(0.33126)) * i; 214 /* We use a rounding fudge-factor of 0.5-epsilon for Cb and Cr. 215 * This ensures that the maximum output will round to MAXJSAMPLE 216 * not MAXJSAMPLE+1, and thus that we don't have to range-limit. 217 */ 218 rgb_ycc_tab[i+B_CB_OFF] = FIX(0.50000) * i + CBCR_OFFSET + ONE_HALF-1; 219 /* B=>Cb and R=>Cr tables are the same 220 rgb_ycc_tab[i+R_CR_OFF] = FIX(0.50000) * i + CBCR_OFFSET + ONE_HALF-1; 221 */ 222 rgb_ycc_tab[i+G_CR_OFF] = (-FIX(0.41869)) * i; 223 rgb_ycc_tab[i+B_CR_OFF] = (-FIX(0.08131)) * i; 224 } 225 } 226 227 228 /* 229 * Convert some rows of samples to the JPEG colorspace. 230 */ 231 232 METHODDEF(void) 233 rgb_ycc_convert (j_compress_ptr cinfo, 234 JSAMPARRAY input_buf, JSAMPIMAGE output_buf, 235 JDIMENSION output_row, int num_rows) 236 { 237 switch (cinfo->in_color_space) { 238 case JCS_EXT_RGB: 239 extrgb_ycc_convert_internal(cinfo, input_buf, output_buf, output_row, 240 num_rows); 241 break; 242 case JCS_EXT_RGBX: 243 case JCS_EXT_RGBA: 244 extrgbx_ycc_convert_internal(cinfo, input_buf, output_buf, output_row, 245 num_rows); 246 break; 247 case JCS_EXT_BGR: 248 extbgr_ycc_convert_internal(cinfo, input_buf, output_buf, output_row, 249 num_rows); 250 break; 251 case JCS_EXT_BGRX: 252 case JCS_EXT_BGRA: 253 extbgrx_ycc_convert_internal(cinfo, input_buf, output_buf, output_row, 254 num_rows); 255 break; 256 case JCS_EXT_XBGR: 257 case JCS_EXT_ABGR: 258 extxbgr_ycc_convert_internal(cinfo, input_buf, output_buf, output_row, 259 num_rows); 260 break; 261 case JCS_EXT_XRGB: 262 case JCS_EXT_ARGB: 263 extxrgb_ycc_convert_internal(cinfo, input_buf, output_buf, output_row, 264 num_rows); 265 break; 266 default: 267 rgb_ycc_convert_internal(cinfo, input_buf, output_buf, output_row, 268 num_rows); 269 break; 270 } 271 } 272 273 274 /**************** Cases other than RGB -> YCbCr **************/ 275 276 277 /* 278 * Convert some rows of samples to the JPEG colorspace. 279 */ 280 281 METHODDEF(void) 282 rgb_gray_convert (j_compress_ptr cinfo, 283 JSAMPARRAY input_buf, JSAMPIMAGE output_buf, 284 JDIMENSION output_row, int num_rows) 285 { 286 switch (cinfo->in_color_space) { 287 case JCS_EXT_RGB: 288 extrgb_gray_convert_internal(cinfo, input_buf, output_buf, output_row, 289 num_rows); 290 break; 291 case JCS_EXT_RGBX: 292 case JCS_EXT_RGBA: 293 extrgbx_gray_convert_internal(cinfo, input_buf, output_buf, output_row, 294 num_rows); 295 break; 296 case JCS_EXT_BGR: 297 extbgr_gray_convert_internal(cinfo, input_buf, output_buf, output_row, 298 num_rows); 299 break; 300 case JCS_EXT_BGRX: 301 case JCS_EXT_BGRA: 302 extbgrx_gray_convert_internal(cinfo, input_buf, output_buf, output_row, 303 num_rows); 304 break; 305 case JCS_EXT_XBGR: 306 case JCS_EXT_ABGR: 307 extxbgr_gray_convert_internal(cinfo, input_buf, output_buf, output_row, 308 num_rows); 309 break; 310 case JCS_EXT_XRGB: 311 case JCS_EXT_ARGB: 312 extxrgb_gray_convert_internal(cinfo, input_buf, output_buf, output_row, 313 num_rows); 314 break; 315 default: 316 rgb_gray_convert_internal(cinfo, input_buf, output_buf, output_row, 317 num_rows); 318 break; 319 } 320 } 321 322 323 /* 324 * Extended RGB to plain RGB conversion 325 */ 326 327 METHODDEF(void) 328 rgb_rgb_convert (j_compress_ptr cinfo, 329 JSAMPARRAY input_buf, JSAMPIMAGE output_buf, 330 JDIMENSION output_row, int num_rows) 331 { 332 switch (cinfo->in_color_space) { 333 case JCS_EXT_RGB: 334 extrgb_rgb_convert_internal(cinfo, input_buf, output_buf, output_row, 335 num_rows); 336 break; 337 case JCS_EXT_RGBX: 338 case JCS_EXT_RGBA: 339 extrgbx_rgb_convert_internal(cinfo, input_buf, output_buf, output_row, 340 num_rows); 341 break; 342 case JCS_EXT_BGR: 343 extbgr_rgb_convert_internal(cinfo, input_buf, output_buf, output_row, 344 num_rows); 345 break; 346 case JCS_EXT_BGRX: 347 case JCS_EXT_BGRA: 348 extbgrx_rgb_convert_internal(cinfo, input_buf, output_buf, output_row, 349 num_rows); 350 break; 351 case JCS_EXT_XBGR: 352 case JCS_EXT_ABGR: 353 extxbgr_rgb_convert_internal(cinfo, input_buf, output_buf, output_row, 354 num_rows); 355 break; 356 case JCS_EXT_XRGB: 357 case JCS_EXT_ARGB: 358 extxrgb_rgb_convert_internal(cinfo, input_buf, output_buf, output_row, 359 num_rows); 360 break; 361 default: 362 rgb_rgb_convert_internal(cinfo, input_buf, output_buf, output_row, 363 num_rows); 364 break; 365 } 366 } 367 368 369 /* 370 * Convert some rows of samples to the JPEG colorspace. 371 * This version handles Adobe-style CMYK->YCCK conversion, 372 * where we convert R=1-C, G=1-M, and B=1-Y to YCbCr using the same 373 * conversion as above, while passing K (black) unchanged. 374 * We assume rgb_ycc_start has been called. 375 */ 376 377 METHODDEF(void) 378 cmyk_ycck_convert (j_compress_ptr cinfo, 379 JSAMPARRAY input_buf, JSAMPIMAGE output_buf, 380 JDIMENSION output_row, int num_rows) 381 { 382 my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert; 383 register int r, g, b; 384 register INT32 * ctab = cconvert->rgb_ycc_tab; 385 register JSAMPROW inptr; 386 register JSAMPROW outptr0, outptr1, outptr2, outptr3; 387 register JDIMENSION col; 388 JDIMENSION num_cols = cinfo->image_width; 389 390 while (--num_rows >= 0) { 391 inptr = *input_buf++; 392 outptr0 = output_buf[0][output_row]; 393 outptr1 = output_buf[1][output_row]; 394 outptr2 = output_buf[2][output_row]; 395 outptr3 = output_buf[3][output_row]; 396 output_row++; 397 for (col = 0; col < num_cols; col++) { 398 r = MAXJSAMPLE - GETJSAMPLE(inptr[0]); 399 g = MAXJSAMPLE - GETJSAMPLE(inptr[1]); 400 b = MAXJSAMPLE - GETJSAMPLE(inptr[2]); 401 /* K passes through as-is */ 402 outptr3[col] = inptr[3]; /* don't need GETJSAMPLE here */ 403 inptr += 4; 404 /* If the inputs are 0..MAXJSAMPLE, the outputs of these equations 405 * must be too; we do not need an explicit range-limiting operation. 406 * Hence the value being shifted is never negative, and we don't 407 * need the general RIGHT_SHIFT macro. 408 */ 409 /* Y */ 410 outptr0[col] = (JSAMPLE) 411 ((ctab[r+R_Y_OFF] + ctab[g+G_Y_OFF] + ctab[b+B_Y_OFF]) 412 >> SCALEBITS); 413 /* Cb */ 414 outptr1[col] = (JSAMPLE) 415 ((ctab[r+R_CB_OFF] + ctab[g+G_CB_OFF] + ctab[b+B_CB_OFF]) 416 >> SCALEBITS); 417 /* Cr */ 418 outptr2[col] = (JSAMPLE) 419 ((ctab[r+R_CR_OFF] + ctab[g+G_CR_OFF] + ctab[b+B_CR_OFF]) 420 >> SCALEBITS); 421 } 422 } 423 } 424 425 426 /* 427 * Convert some rows of samples to the JPEG colorspace. 428 * This version handles grayscale output with no conversion. 429 * The source can be either plain grayscale or YCbCr (since Y == gray). 430 */ 431 432 METHODDEF(void) 433 grayscale_convert (j_compress_ptr cinfo, 434 JSAMPARRAY input_buf, JSAMPIMAGE output_buf, 435 JDIMENSION output_row, int num_rows) 436 { 437 register JSAMPROW inptr; 438 register JSAMPROW outptr; 439 register JDIMENSION col; 440 JDIMENSION num_cols = cinfo->image_width; 441 int instride = cinfo->input_components; 442 443 while (--num_rows >= 0) { 444 inptr = *input_buf++; 445 outptr = output_buf[0][output_row]; 446 output_row++; 447 for (col = 0; col < num_cols; col++) { 448 outptr[col] = inptr[0]; /* don't need GETJSAMPLE() here */ 449 inptr += instride; 450 } 451 } 452 } 453 454 455 /* 456 * Convert some rows of samples to the JPEG colorspace. 457 * This version handles multi-component colorspaces without conversion. 458 * We assume input_components == num_components. 459 */ 460 461 METHODDEF(void) 462 null_convert (j_compress_ptr cinfo, 463 JSAMPARRAY input_buf, JSAMPIMAGE output_buf, 464 JDIMENSION output_row, int num_rows) 465 { 466 register JSAMPROW inptr; 467 register JSAMPROW outptr, outptr0, outptr1, outptr2, outptr3; 468 register JDIMENSION col; 469 register int ci; 470 int nc = cinfo->num_components; 471 JDIMENSION num_cols = cinfo->image_width; 472 473 if (nc == 3) { 474 while (--num_rows >= 0) { 475 inptr = *input_buf++; 476 outptr0 = output_buf[0][output_row]; 477 outptr1 = output_buf[1][output_row]; 478 outptr2 = output_buf[2][output_row]; 479 output_row++; 480 for (col = 0; col < num_cols; col++) { 481 outptr0[col] = *inptr++; 482 outptr1[col] = *inptr++; 483 outptr2[col] = *inptr++; 484 } 485 } 486 } else if (nc == 4) { 487 while (--num_rows >= 0) { 488 inptr = *input_buf++; 489 outptr0 = output_buf[0][output_row]; 490 outptr1 = output_buf[1][output_row]; 491 outptr2 = output_buf[2][output_row]; 492 outptr3 = output_buf[3][output_row]; 493 output_row++; 494 for (col = 0; col < num_cols; col++) { 495 outptr0[col] = *inptr++; 496 outptr1[col] = *inptr++; 497 outptr2[col] = *inptr++; 498 outptr3[col] = *inptr++; 499 } 500 } 501 } else { 502 while (--num_rows >= 0) { 503 /* It seems fastest to make a separate pass for each component. */ 504 for (ci = 0; ci < nc; ci++) { 505 inptr = *input_buf; 506 outptr = output_buf[ci][output_row]; 507 for (col = 0; col < num_cols; col++) { 508 outptr[col] = inptr[ci]; /* don't need GETJSAMPLE() here */ 509 inptr += nc; 510 } 511 } 512 input_buf++; 513 output_row++; 514 } 515 } 516 } 517 518 519 /* 520 * Empty method for start_pass. 521 */ 522 523 METHODDEF(void) 524 null_method (j_compress_ptr cinfo) 525 { 526 /* no work needed */ 527 } 528 529 530 /* 531 * Module initialization routine for input colorspace conversion. 532 */ 533 534 GLOBAL(void) 535 jinit_color_converter (j_compress_ptr cinfo) 536 { 537 my_cconvert_ptr cconvert; 538 539 cconvert = (my_cconvert_ptr) 540 (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, 541 sizeof(my_color_converter)); 542 cinfo->cconvert = (struct jpeg_color_converter *) cconvert; 543 /* set start_pass to null method until we find out differently */ 544 cconvert->pub.start_pass = null_method; 545 546 /* Make sure input_components agrees with in_color_space */ 547 switch (cinfo->in_color_space) { 548 case JCS_GRAYSCALE: 549 if (cinfo->input_components != 1) 550 ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE); 551 break; 552 553 case JCS_RGB: 554 case JCS_EXT_RGB: 555 case JCS_EXT_RGBX: 556 case JCS_EXT_BGR: 557 case JCS_EXT_BGRX: 558 case JCS_EXT_XBGR: 559 case JCS_EXT_XRGB: 560 case JCS_EXT_RGBA: 561 case JCS_EXT_BGRA: 562 case JCS_EXT_ABGR: 563 case JCS_EXT_ARGB: 564 if (cinfo->input_components != rgb_pixelsize[cinfo->in_color_space]) 565 ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE); 566 break; 567 568 case JCS_YCbCr: 569 if (cinfo->input_components != 3) 570 ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE); 571 break; 572 573 case JCS_CMYK: 574 case JCS_YCCK: 575 if (cinfo->input_components != 4) 576 ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE); 577 break; 578 579 default: /* JCS_UNKNOWN can be anything */ 580 if (cinfo->input_components < 1) 581 ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE); 582 break; 583 } 584 585 /* Check num_components, set conversion method based on requested space */ 586 switch (cinfo->jpeg_color_space) { 587 case JCS_GRAYSCALE: 588 if (cinfo->num_components != 1) 589 ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); 590 if (cinfo->in_color_space == JCS_GRAYSCALE) 591 cconvert->pub.color_convert = grayscale_convert; 592 else if (cinfo->in_color_space == JCS_RGB || 593 cinfo->in_color_space == JCS_EXT_RGB || 594 cinfo->in_color_space == JCS_EXT_RGBX || 595 cinfo->in_color_space == JCS_EXT_BGR || 596 cinfo->in_color_space == JCS_EXT_BGRX || 597 cinfo->in_color_space == JCS_EXT_XBGR || 598 cinfo->in_color_space == JCS_EXT_XRGB || 599 cinfo->in_color_space == JCS_EXT_RGBA || 600 cinfo->in_color_space == JCS_EXT_BGRA || 601 cinfo->in_color_space == JCS_EXT_ABGR || 602 cinfo->in_color_space == JCS_EXT_ARGB) { 603 if (jsimd_can_rgb_gray()) 604 cconvert->pub.color_convert = jsimd_rgb_gray_convert; 605 else { 606 cconvert->pub.start_pass = rgb_ycc_start; 607 cconvert->pub.color_convert = rgb_gray_convert; 608 } 609 } else if (cinfo->in_color_space == JCS_YCbCr) 610 cconvert->pub.color_convert = grayscale_convert; 611 else 612 ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); 613 break; 614 615 case JCS_RGB: 616 if (cinfo->num_components != 3) 617 ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); 618 if (rgb_red[cinfo->in_color_space] == 0 && 619 rgb_green[cinfo->in_color_space] == 1 && 620 rgb_blue[cinfo->in_color_space] == 2 && 621 rgb_pixelsize[cinfo->in_color_space] == 3) { 622 #if defined(__mips__) 623 if (jsimd_c_can_null_convert()) 624 cconvert->pub.color_convert = jsimd_c_null_convert; 625 else 626 #endif 627 cconvert->pub.color_convert = null_convert; 628 } else if (cinfo->in_color_space == JCS_RGB || 629 cinfo->in_color_space == JCS_EXT_RGB || 630 cinfo->in_color_space == JCS_EXT_RGBX || 631 cinfo->in_color_space == JCS_EXT_BGR || 632 cinfo->in_color_space == JCS_EXT_BGRX || 633 cinfo->in_color_space == JCS_EXT_XBGR || 634 cinfo->in_color_space == JCS_EXT_XRGB || 635 cinfo->in_color_space == JCS_EXT_RGBA || 636 cinfo->in_color_space == JCS_EXT_BGRA || 637 cinfo->in_color_space == JCS_EXT_ABGR || 638 cinfo->in_color_space == JCS_EXT_ARGB) 639 cconvert->pub.color_convert = rgb_rgb_convert; 640 else 641 ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); 642 break; 643 644 case JCS_YCbCr: 645 if (cinfo->num_components != 3) 646 ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); 647 if (cinfo->in_color_space == JCS_RGB || 648 cinfo->in_color_space == JCS_EXT_RGB || 649 cinfo->in_color_space == JCS_EXT_RGBX || 650 cinfo->in_color_space == JCS_EXT_BGR || 651 cinfo->in_color_space == JCS_EXT_BGRX || 652 cinfo->in_color_space == JCS_EXT_XBGR || 653 cinfo->in_color_space == JCS_EXT_XRGB || 654 cinfo->in_color_space == JCS_EXT_RGBA || 655 cinfo->in_color_space == JCS_EXT_BGRA || 656 cinfo->in_color_space == JCS_EXT_ABGR || 657 cinfo->in_color_space == JCS_EXT_ARGB) { 658 if (jsimd_can_rgb_ycc()) 659 cconvert->pub.color_convert = jsimd_rgb_ycc_convert; 660 else { 661 cconvert->pub.start_pass = rgb_ycc_start; 662 cconvert->pub.color_convert = rgb_ycc_convert; 663 } 664 } else if (cinfo->in_color_space == JCS_YCbCr) { 665 #if defined(__mips__) 666 if (jsimd_c_can_null_convert()) 667 cconvert->pub.color_convert = jsimd_c_null_convert; 668 else 669 #endif 670 cconvert->pub.color_convert = null_convert; 671 } else 672 ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); 673 break; 674 675 case JCS_CMYK: 676 if (cinfo->num_components != 4) 677 ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); 678 if (cinfo->in_color_space == JCS_CMYK) { 679 #if defined(__mips__) 680 if (jsimd_c_can_null_convert()) 681 cconvert->pub.color_convert = jsimd_c_null_convert; 682 else 683 #endif 684 cconvert->pub.color_convert = null_convert; 685 } else 686 ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); 687 break; 688 689 case JCS_YCCK: 690 if (cinfo->num_components != 4) 691 ERREXIT(cinfo, JERR_BAD_J_COLORSPACE); 692 if (cinfo->in_color_space == JCS_CMYK) { 693 cconvert->pub.start_pass = rgb_ycc_start; 694 cconvert->pub.color_convert = cmyk_ycck_convert; 695 } else if (cinfo->in_color_space == JCS_YCCK) { 696 #if defined(__mips__) 697 if (jsimd_c_can_null_convert()) 698 cconvert->pub.color_convert = jsimd_c_null_convert; 699 else 700 #endif 701 cconvert->pub.color_convert = null_convert; 702 } else 703 ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); 704 break; 705 706 default: /* allow null conversion of JCS_UNKNOWN */ 707 if (cinfo->jpeg_color_space != cinfo->in_color_space || 708 cinfo->num_components != cinfo->input_components) 709 ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL); 710 #if defined(__mips__) 711 if (jsimd_c_can_null_convert()) 712 cconvert->pub.color_convert = jsimd_c_null_convert; 713 else 714 #endif 715 cconvert->pub.color_convert = null_convert; 716 break; 717 } 718 } 719
