1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876
|
/* Copyright (C) 2001-2022 Artifex Software, Inc.
All Rights Reserved.
This software is provided AS-IS with no warranty, either express or
implied.
This software is distributed under license and may not be copied,
modified or distributed except as expressly authorized under the terms
of the license contained in the file LICENSE in this distribution.
Refer to licensing information at http://www.artifex.com or contact
Artifex Software, Inc., 1305 Grant Avenue - Suite 200, Novato,
CA 94945, U.S.A., +1(415)492-9861, for further information.
*/
/* gsicc interface to littleCMS */
#include "memory_.h"
#include "lcms2.h"
#include "lcms2_plugin.h"
#include "gslibctx.h"
#include "gserrors.h"
#include "gp.h"
#include "gsicc_cms.h"
#include "gxdevice.h"
#define USE_LCMS2_LOCKING
#ifdef USE_LCMS2_LOCKING
#include "gxsync.h"
#endif
#define DUMP_CMS_BUFFER 0
#define DEBUG_LCMS_MEM 0
#define LCMS_BYTES_MASK 0x7
typedef struct gsicc_lcms2_link_s gsicc_lcms2_link_t;
/* Only provide warning about issues in lcms if debug build */
static void
gscms_error(cmsContext ContextID,
cmsUInt32Number error_code,
const char *error_text)
{
#ifdef DEBUG
gs_warn1("cmm error : %s",error_text);
#endif
}
static
void *gs_lcms2_malloc(cmsContext id, unsigned int size)
{
void *ptr;
#if !(defined(SHARE_LCMS) && SHARE_LCMS==1)
gs_memory_t *mem = (gs_memory_t *)cmsGetContextUserData(id);
#endif
#if defined(SHARE_LCMS) && SHARE_LCMS==1
ptr = malloc(size);
#else
ptr = gs_alloc_bytes(mem, size, "lcms");
#endif
#if DEBUG_LCMS_MEM
gs_warn2("lcms malloc (%d) at 0x%x",size,ptr);
#endif
return ptr;
}
static
void gs_lcms2_free(cmsContext id, void *ptr)
{
#if !(defined(SHARE_LCMS) && SHARE_LCMS==1)
gs_memory_t *mem = (gs_memory_t *)cmsGetContextUserData(id);
#endif
if (ptr != NULL) {
#if DEBUG_LCMS_MEM
gs_warn1("lcms free at 0x%x",ptr);
#endif
#if defined(SHARE_LCMS) && SHARE_LCMS==1
free(ptr);
#else
gs_free_object(mem, ptr, "lcms");
#endif
}
}
static
void *gs_lcms2_realloc(cmsContext id, void *ptr, unsigned int size)
{
#if !(defined(SHARE_LCMS) && SHARE_LCMS==1)
gs_memory_t *mem = (gs_memory_t *)cmsGetContextUserData(id);
#endif
void *ptr2;
if (ptr == 0)
return gs_lcms2_malloc(id, size);
if (size == 0)
{
gs_lcms2_free(id, ptr);
return NULL;
}
#if defined(SHARE_LCMS) && SHARE_LCMS==1
ptr2 = realloc(ptr, size);
#else
ptr2 = gs_resize_object(mem, ptr, size, "lcms");
#endif
#if DEBUG_LCMS_MEM
gs_warn3("lcms realloc (%x,%d) at 0x%x",ptr,size,ptr2);
#endif
return ptr2;
}
static cmsPluginMemHandler gs_cms_memhandler =
{
{
cmsPluginMagicNumber,
2000,
cmsPluginMemHandlerSig,
NULL
},
gs_lcms2_malloc,
gs_lcms2_free,
gs_lcms2_realloc,
NULL,
NULL,
NULL,
};
#ifdef USE_LCMS2_LOCKING
static
void *gs_lcms2_createMutex(cmsContext id)
{
gs_memory_t *mem = (gs_memory_t *)cmsGetContextUserData(id);
return gx_monitor_label(gx_monitor_alloc(mem), "lcms2");
}
static
void gs_lcms2_destroyMutex(cmsContext id, void* mtx)
{
gx_monitor_free((gx_monitor_t *)mtx);
}
static
cmsBool gs_lcms2_lockMutex(cmsContext id, void* mtx)
{
return !gx_monitor_enter((gx_monitor_t *)mtx);
}
static
void gs_lcms2_unlockMutex(cmsContext id, void* mtx)
{
gx_monitor_leave((gx_monitor_t *)mtx);
}
static cmsPluginMutex gs_cms_mutexhandler =
{
{
cmsPluginMagicNumber,
2060,
cmsPluginMutexSig,
NULL
},
gs_lcms2_createMutex,
gs_lcms2_destroyMutex,
gs_lcms2_lockMutex,
gs_lcms2_unlockMutex
};
#endif
/* Get the number of channels for the profile.
Input count */
int
gscms_get_input_channel_count(gcmmhprofile_t profile, gs_memory_t *memory)
{
cmsColorSpaceSignature colorspace;
colorspace = cmsGetColorSpace(profile);
return(cmsChannelsOf(colorspace));
}
/* Get the number of output channels for the profile */
int
gscms_get_output_channel_count(gcmmhprofile_t profile, gs_memory_t *memory)
{
cmsColorSpaceSignature colorspace;
colorspace = cmsGetPCS(profile);
return(cmsChannelsOf(colorspace));
}
/* Get the number of colorant names in the clrt tag */
int
gscms_get_numberclrtnames(gcmmhprofile_t profile, gs_memory_t *memory)
{
cmsNAMEDCOLORLIST *lcms_names;
lcms_names = (cmsNAMEDCOLORLIST *)cmsReadTag(profile,
cmsSigColorantTableTag);
return cmsNamedColorCount(lcms_names);
}
/* Get the nth colorant name in the clrt tag */
char*
gscms_get_clrtname(gcmmhprofile_t profile, int colorcount, gs_memory_t *memory)
{
cmsNAMEDCOLORLIST *lcms_names;
char name[256];
char *buf;
int length;
lcms_names = (cmsNAMEDCOLORLIST *)cmsReadTag(profile,
cmsSigColorantTableTag);
if (colorcount >= cmsNamedColorCount(lcms_names)) return(NULL);
if (cmsNamedColorInfo(lcms_names,
colorcount,
name,
NULL,
NULL,
NULL,
NULL) == 0)
return NULL;
length = strlen(name);
buf = (char*) gs_alloc_bytes(memory, length + 1, "gscms_get_clrtname");
if (buf)
strcpy(buf, name);
return buf;
}
/* Check if the profile is a device link type */
bool
gscms_is_device_link(gcmmhprofile_t profile, gs_memory_t *memory)
{
return cmsGetDeviceClass(profile) == cmsSigLinkClass;
}
/* Needed for v2 profile creation */
int
gscms_get_device_class(gcmmhprofile_t profile, gs_memory_t *memory)
{
return cmsGetDeviceClass(profile);
}
/* Check if the profile is a input type */
bool
gscms_is_input(gcmmhprofile_t profile, gs_memory_t *memory)
{
return (cmsGetDeviceClass(profile) == cmsSigInputClass);
}
/* Get the device space associated with this profile */
gsicc_colorbuffer_t
gscms_get_profile_data_space(gcmmhprofile_t profile, gs_memory_t *memory)
{
cmsColorSpaceSignature colorspace;
colorspace = cmsGetColorSpace(profile);
switch( colorspace ) {
case cmsSigXYZData:
return(gsCIEXYZ);
case cmsSigLabData:
return(gsCIELAB);
case cmsSigRgbData:
return(gsRGB);
case cmsSigGrayData:
return(gsGRAY);
case cmsSigCmykData:
return(gsCMYK);
default:
return(gsNCHANNEL);
}
}
/* Get ICC Profile handle from buffer */
gcmmhprofile_t
gscms_get_profile_handle_mem(unsigned char *buffer,
unsigned int input_size, gs_memory_t *mem)
{
cmsContext ctx = gs_lib_ctx_get_cms_context(mem);
cmsSetLogErrorHandlerTHR(ctx, gscms_error);
return(cmsOpenProfileFromMemTHR(ctx,buffer,input_size));
}
/* Get ICC Profile handle from file ptr */
gcmmhprofile_t
gscms_get_profile_handle_file(const char *filename, gs_memory_t *mem)
{
cmsContext ctx = gs_lib_ctx_get_cms_context(mem);
return(cmsOpenProfileFromFileTHR(ctx, filename, "r"));
}
/* Transform an entire buffer */
int
gscms_transform_color_buffer(gx_device *dev, gsicc_link_t *icclink,
gsicc_bufferdesc_t *input_buff_desc,
gsicc_bufferdesc_t *output_buff_desc,
void *inputbuffer,
void *outputbuffer)
{
cmsHTRANSFORM hTransform = (cmsHTRANSFORM)icclink->link_handle;
cmsUInt32Number dwInputFormat, dwOutputFormat, num_src_lcms, num_des_lcms;
int planar,numbytes, swap_endian, hasalpha, k;
unsigned char *inputpos, *outputpos;
#if DUMP_CMS_BUFFER
gp_file *fid_in, *fid_out;
#endif
/* Although little CMS does make assumptions about data types in its
transformations you can change it after the fact. */
/* Set us to the proper output type */
/* Note, we could speed this up by passing back the encoded data type
to the caller so that we could avoid having to go through this
computation each time if they are doing multiple calls to this
operation */
/* Color space MUST be the same */
dwInputFormat = COLORSPACE_SH(T_COLORSPACE(cmsGetTransformInputFormat(hTransform)));
dwOutputFormat = COLORSPACE_SH(T_COLORSPACE(cmsGetTransformOutputFormat(hTransform)));
/* Now set if we have planar, num bytes, endian case, and alpha data to skip */
/* Planar -- pdf14 case for example */
planar = input_buff_desc->is_planar;
dwInputFormat = dwInputFormat | PLANAR_SH(planar);
planar = output_buff_desc->is_planar;
dwOutputFormat = dwOutputFormat | PLANAR_SH(planar);
/* 8 or 16 byte input and output */
numbytes = input_buff_desc->bytes_per_chan;
if (numbytes>2) numbytes = 0; /* littleCMS encodes float with 0 ToDO. */
dwInputFormat = dwInputFormat | BYTES_SH(numbytes);
numbytes = output_buff_desc->bytes_per_chan;
if (numbytes>2) numbytes = 0;
dwOutputFormat = dwOutputFormat | BYTES_SH(numbytes);
/* endian */
swap_endian = input_buff_desc->endian_swap;
dwInputFormat = dwInputFormat | ENDIAN16_SH(swap_endian);
swap_endian = output_buff_desc->endian_swap;
dwOutputFormat = dwOutputFormat | ENDIAN16_SH(swap_endian);
/* number of channels. This should not really be changing! */
num_src_lcms = T_CHANNELS(cmsGetTransformInputFormat(hTransform));
num_des_lcms = T_CHANNELS(cmsGetTransformOutputFormat(hTransform));
if (num_src_lcms != input_buff_desc->num_chan ||
num_des_lcms != output_buff_desc->num_chan) {
/* We can't transform this. Someone is doing something odd */
return_error(gs_error_unknownerror);
}
dwInputFormat = dwInputFormat | CHANNELS_SH(num_src_lcms);
dwOutputFormat = dwOutputFormat | CHANNELS_SH(num_des_lcms);
/* alpha, which is passed through unmolested */
/* ToDo: Right now we always must have alpha last */
/* This is really only going to be an issue when we have
interleaved alpha data */
hasalpha = input_buff_desc->has_alpha;
dwInputFormat = dwInputFormat | EXTRA_SH(hasalpha);
dwOutputFormat = dwOutputFormat | EXTRA_SH(hasalpha);
/* Change the formatters */
cmsChangeBuffersFormat(hTransform,dwInputFormat,dwOutputFormat);
/* littleCMS knows nothing about word boundarys. As such, we need to do
this row by row adjusting for our stride. Output buffer must already
be allocated. ToDo: Check issues with plane and row stride and word
boundry */
inputpos = (byte *) inputbuffer;
outputpos = (byte *) outputbuffer;
if(input_buff_desc->is_planar){
/* Determine if we can do this in one operation or if we have to break
it up. Essentially if the width * height = plane_stride then yes. If
we are doing some subsection of a plane then no. */
if (input_buff_desc->num_rows * input_buff_desc->pixels_per_row ==
input_buff_desc->plane_stride &&
output_buff_desc->num_rows * output_buff_desc->pixels_per_row ==
output_buff_desc->plane_stride) {
/* Do entire buffer.*/
cmsDoTransform(hTransform, inputpos, outputpos,
input_buff_desc->plane_stride);
} else {
/* We have to do this row by row, with memory transfers */
byte *temp_des, *temp_src;
int source_size = input_buff_desc->bytes_per_chan *
input_buff_desc->pixels_per_row;
int des_size = output_buff_desc->bytes_per_chan *
output_buff_desc->pixels_per_row;
int y, i;
temp_src = (byte*)gs_alloc_bytes(dev->memory->non_gc_memory,
source_size * input_buff_desc->num_chan,
"gscms_transform_color_buffer");
if (temp_src == NULL)
return_error(gs_error_VMerror);
temp_des = (byte*) gs_alloc_bytes(dev->memory->non_gc_memory,
des_size * output_buff_desc->num_chan,
"gscms_transform_color_buffer");
if (temp_des == NULL)
return_error(gs_error_VMerror);
for (y = 0; y < input_buff_desc->num_rows; y++) {
byte *src_cm = temp_src;
byte *src_buff = inputpos;
byte *des_cm = temp_des;
byte *des_buff = outputpos;
/* Put into planar temp buffer */
for (i = 0; i < input_buff_desc->num_chan; i ++) {
memcpy(src_cm, src_buff, source_size);
src_cm += source_size;
src_buff += input_buff_desc->plane_stride;
}
/* Transform */
cmsDoTransform(hTransform, temp_src, temp_des,
input_buff_desc->pixels_per_row);
/* Get out of temp planar buffer */
for (i = 0; i < output_buff_desc->num_chan; i ++) {
memcpy(des_buff, des_cm, des_size);
des_cm += des_size;
des_buff += output_buff_desc->plane_stride;
}
inputpos += input_buff_desc->row_stride;
outputpos += output_buff_desc->row_stride;
}
gs_free_object(dev->memory->non_gc_memory, temp_src,
"gscms_transform_color_buffer");
gs_free_object(dev->memory->non_gc_memory, temp_des,
"gscms_transform_color_buffer");
}
} else {
/* Do row by row. */
for(k = 0; k < input_buff_desc->num_rows ; k++){
cmsDoTransform(hTransform, inputpos, outputpos,
input_buff_desc->pixels_per_row);
inputpos += input_buff_desc->row_stride;
outputpos += output_buff_desc->row_stride;
}
}
#if DUMP_CMS_BUFFER
fid_in = gp_fopen(dev->memory,"CM_Input.raw","ab");
fid_out = gp_fopen(dev->memory,"CM_Output.raw","ab");
fwrite((unsigned char*) inputbuffer,sizeof(unsigned char),
input_buff_desc->row_stride,fid_in);
fwrite((unsigned char*) outputbuffer,sizeof(unsigned char),
output_buff_desc->row_stride,fid_out);
fclose(fid_in);
fclose(fid_out);
#endif
return 0;
}
/* Transform a single color. We assume we have passed to us the proper number
of elements of size gx_device_color. It is up to the caller to make sure
the proper allocations for the colors are there. */
int
gscms_transform_color(gx_device *dev, gsicc_link_t *icclink, void *inputcolor,
void *outputcolor, int num_bytes)
{
return gscms_transform_color_const(dev, icclink, inputcolor, outputcolor, num_bytes);
}
int
gscms_transform_color_const(const gx_device *dev, gsicc_link_t *icclink, void *inputcolor,
void *outputcolor, int num_bytes)
{
cmsHTRANSFORM hTransform = (cmsHTRANSFORM)icclink->link_handle;
cmsUInt32Number dwInputFormat,dwOutputFormat;
/* For a single color, we are going to use the link as it is
with the exception of taking care of the word size. */
/* numbytes = sizeof(gx_color_value); */
if (num_bytes>2) num_bytes = 0; /* littleCMS encodes float with 0 ToDO. */
dwInputFormat = cmsGetTransformInputFormat(hTransform);
dwOutputFormat = cmsGetTransformOutputFormat(hTransform);
dwInputFormat = (dwInputFormat & (~LCMS_BYTES_MASK)) | BYTES_SH(num_bytes);
dwOutputFormat = (dwOutputFormat & (~LCMS_BYTES_MASK)) | BYTES_SH(num_bytes);
/* Change the formatters */
cmsChangeBuffersFormat(hTransform,dwInputFormat,dwOutputFormat);
/* Do conversion */
cmsDoTransform(hTransform,inputcolor,outputcolor,1);
return 0;
}
/* Get the flag to avoid having to the cmm do any white fix up, it such a flag
exists for the cmm */
int
gscms_avoid_white_fix_flag(gs_memory_t *memory)
{
return cmsFLAGS_NOWHITEONWHITEFIXUP;
}
void
gscms_get_link_dim(gcmmhlink_t link, int *num_inputs, int *num_outputs,
gs_memory_t *memory)
{
*num_inputs = T_CHANNELS(cmsGetTransformInputFormat(link));
*num_outputs = T_CHANNELS(cmsGetTransformOutputFormat(link));
}
/* Get the link from the CMS. TODO: Add error checking */
gcmmhlink_t
gscms_get_link(gcmmhprofile_t lcms_srchandle,
gcmmhprofile_t lcms_deshandle,
gsicc_rendering_param_t *rendering_params, int cmm_flags,
gs_memory_t *memory)
{
cmsUInt32Number src_data_type,des_data_type;
cmsColorSpaceSignature src_color_space,des_color_space;
int src_nChannels,des_nChannels;
int lcms_src_color_space, lcms_des_color_space;
unsigned int flag;
cmsContext ctx = gs_lib_ctx_get_cms_context(memory);
/* Check for case of request for a transfrom from a device link profile
in that case, the destination profile is NULL */
/* First handle all the source stuff */
src_color_space = cmsGetColorSpace(lcms_srchandle);
lcms_src_color_space = _cmsLCMScolorSpace(src_color_space);
/* littlecms returns -1 for types it does not (but should) understand */
if (lcms_src_color_space < 0) lcms_src_color_space = 0;
src_nChannels = cmsChannelsOf(src_color_space);
/* For now, just do single byte data, interleaved. We can change this
when we use the transformation. */
src_data_type = (COLORSPACE_SH(lcms_src_color_space)|
CHANNELS_SH(src_nChannels)|BYTES_SH(2));
if (lcms_deshandle != NULL) {
des_color_space = cmsGetColorSpace(lcms_deshandle);
} else {
/* We must have a device link profile. Use it's PCS space. */
des_color_space = cmsGetPCS(lcms_srchandle);
}
lcms_des_color_space = _cmsLCMScolorSpace(des_color_space);
if (lcms_des_color_space < 0) lcms_des_color_space = 0;
des_nChannels = cmsChannelsOf(des_color_space);
des_data_type = (COLORSPACE_SH(lcms_des_color_space)|
CHANNELS_SH(des_nChannels)|BYTES_SH(2));
/* Set up the flags */
flag = cmsFLAGS_HIGHRESPRECALC;
if (rendering_params->black_point_comp == gsBLACKPTCOMP_ON
|| rendering_params->black_point_comp == gsBLACKPTCOMP_ON_OR) {
flag = (flag | cmsFLAGS_BLACKPOINTCOMPENSATION);
}
if (rendering_params->preserve_black == gsBLACKPRESERVE_KONLY) {
switch (rendering_params->rendering_intent) {
case INTENT_PERCEPTUAL:
rendering_params->rendering_intent = INTENT_PRESERVE_K_ONLY_PERCEPTUAL;
break;
case INTENT_RELATIVE_COLORIMETRIC:
rendering_params->rendering_intent = INTENT_PRESERVE_K_ONLY_RELATIVE_COLORIMETRIC;
break;
case INTENT_SATURATION:
rendering_params->rendering_intent = INTENT_PRESERVE_K_ONLY_SATURATION;
break;
default:
break;
}
}
if (rendering_params->preserve_black == gsBLACKPRESERVE_KPLANE) {
switch (rendering_params->rendering_intent) {
case INTENT_PERCEPTUAL:
rendering_params->rendering_intent = INTENT_PRESERVE_K_PLANE_PERCEPTUAL;
break;
case INTENT_RELATIVE_COLORIMETRIC:
rendering_params->rendering_intent = INTENT_PRESERVE_K_PLANE_RELATIVE_COLORIMETRIC;
break;
case INTENT_SATURATION:
rendering_params->rendering_intent = INTENT_PRESERVE_K_PLANE_SATURATION;
break;
default:
break;
}
}
/* Create the link */
return cmsCreateTransformTHR(ctx,
lcms_srchandle, src_data_type,
lcms_deshandle, des_data_type,
rendering_params->rendering_intent, flag | cmm_flags);
/* cmsFLAGS_HIGHRESPRECALC) cmsFLAGS_NOTPRECALC cmsFLAGS_LOWRESPRECALC*/
}
/* Get the link from the CMS, but include proofing and/or a device link
profile. Note also, that the source may be a device link profile, in
which case we will not have a destination profile but could still have
a proof profile or an additional device link profile */
gcmmhlink_t
gscms_get_link_proof_devlink(gcmmhprofile_t lcms_srchandle,
gcmmhprofile_t lcms_proofhandle,
gcmmhprofile_t lcms_deshandle,
gcmmhprofile_t lcms_devlinkhandle,
gsicc_rendering_param_t *rendering_params,
bool src_dev_link, int cmm_flags,
gs_memory_t *memory)
{
cmsUInt32Number src_data_type,des_data_type;
cmsColorSpaceSignature src_color_space,des_color_space;
int src_nChannels,des_nChannels;
int lcms_src_color_space, lcms_des_color_space;
cmsHPROFILE hProfiles[5];
int nProfiles = 0;
unsigned int flag;
cmsContext ctx = gs_lib_ctx_get_cms_context(memory);
/* Check if the rendering intent is something other than relative colorimetric
and if we have a proofing profile. In this case we need to create the
combined profile a bit different. LCMS does not allow us to use different
intents in the cmsCreateMultiprofileTransform transform. Also, don't even
think about doing this if someone has snuck in a source based device link
profile into the mix */
if (lcms_proofhandle != NULL &&
rendering_params->rendering_intent != gsRELATIVECOLORIMETRIC &&
!src_dev_link) {
/* First handle the source to proof profile with its particular intent as
a device link profile */
cmsHPROFILE src_to_proof;
cmsHTRANSFORM temptransform;
temptransform = gscms_get_link(lcms_srchandle, lcms_proofhandle,
rendering_params, cmm_flags, memory);
/* Now mash that to a device link profile */
flag = cmsFLAGS_HIGHRESPRECALC;
if (rendering_params->black_point_comp == gsBLACKPTCOMP_ON ||
rendering_params->black_point_comp == gsBLACKPTCOMP_ON_OR) {
flag = (flag | cmsFLAGS_BLACKPOINTCOMPENSATION);
}
src_to_proof = cmsTransform2DeviceLink(temptransform, 3.4, flag);
/* Free up the link handle */
cmsDeleteTransform(temptransform);
src_color_space = cmsGetColorSpace(src_to_proof);
lcms_src_color_space = _cmsLCMScolorSpace(src_color_space);
/* littlecms returns -1 for types it does not (but should) understand */
if (lcms_src_color_space < 0) lcms_src_color_space = 0;
src_nChannels = cmsChannelsOf(src_color_space);
/* For now, just do single byte data, interleaved. We can change this
when we use the transformation. */
src_data_type = (COLORSPACE_SH(lcms_src_color_space)|
CHANNELS_SH(src_nChannels)|BYTES_SH(2));
if (lcms_devlinkhandle == NULL) {
des_color_space = cmsGetColorSpace(lcms_deshandle);
} else {
des_color_space = cmsGetPCS(lcms_devlinkhandle);
}
lcms_des_color_space = _cmsLCMScolorSpace(des_color_space);
if (lcms_des_color_space < 0) lcms_des_color_space = 0;
des_nChannels = cmsChannelsOf(des_color_space);
des_data_type = (COLORSPACE_SH(lcms_des_color_space)|
CHANNELS_SH(des_nChannels)|BYTES_SH(2));
/* Now, we need to go back through the proofing profile, to the
destination and then to the device link profile if there was one. */
hProfiles[nProfiles++] = src_to_proof; /* Src to proof with special intent */
hProfiles[nProfiles++] = lcms_proofhandle; /* Proof to CIELAB */
if (lcms_deshandle != NULL) {
hProfiles[nProfiles++] = lcms_deshandle; /* Our destination */
}
/* The output device link profile */
if (lcms_devlinkhandle != NULL) {
hProfiles[nProfiles++] = lcms_devlinkhandle;
}
flag = cmsFLAGS_HIGHRESPRECALC;
if (rendering_params->black_point_comp == gsBLACKPTCOMP_ON
|| rendering_params->black_point_comp == gsBLACKPTCOMP_ON_OR) {
flag = (flag | cmsFLAGS_BLACKPOINTCOMPENSATION);
}
/* Use relative colorimetric here */
temptransform = cmsCreateMultiprofileTransformTHR(ctx,
hProfiles, nProfiles, src_data_type,
des_data_type, gsRELATIVECOLORIMETRIC, flag);
cmsCloseProfile(src_to_proof);
return temptransform;
} else {
/* First handle all the source stuff */
src_color_space = cmsGetColorSpace(lcms_srchandle);
lcms_src_color_space = _cmsLCMScolorSpace(src_color_space);
/* littlecms returns -1 for types it does not (but should) understand */
if (lcms_src_color_space < 0) lcms_src_color_space = 0;
src_nChannels = cmsChannelsOf(src_color_space);
/* For now, just do single byte data, interleaved. We can change this
when we use the transformation. */
src_data_type = (COLORSPACE_SH(lcms_src_color_space)|
CHANNELS_SH(src_nChannels)|BYTES_SH(2));
if (lcms_devlinkhandle == NULL) {
if (src_dev_link) {
des_color_space = cmsGetPCS(lcms_srchandle);
} else {
des_color_space = cmsGetColorSpace(lcms_deshandle);
}
} else {
des_color_space = cmsGetPCS(lcms_devlinkhandle);
}
lcms_des_color_space = _cmsLCMScolorSpace(des_color_space);
if (lcms_des_color_space < 0) lcms_des_color_space = 0;
des_nChannels = cmsChannelsOf(des_color_space);
des_data_type = (COLORSPACE_SH(lcms_des_color_space)|
CHANNELS_SH(des_nChannels)|BYTES_SH(2));
/* lcms proofing transform has a clunky API and can't include the device
link profile if we have both. So use cmsCreateMultiprofileTransform
instead and round trip the proofing profile. */
hProfiles[nProfiles++] = lcms_srchandle;
/* Note if source is device link, we cannot do any proofing */
if (lcms_proofhandle != NULL && !src_dev_link) {
hProfiles[nProfiles++] = lcms_proofhandle;
hProfiles[nProfiles++] = lcms_proofhandle;
}
/* This should be NULL if we have a source device link */
if (lcms_deshandle != NULL) {
hProfiles[nProfiles++] = lcms_deshandle;
}
/* Someone could have a device link at the output, giving us possibly two
device link profiles to smash together */
if (lcms_devlinkhandle != NULL) {
hProfiles[nProfiles++] = lcms_devlinkhandle;
}
flag = cmsFLAGS_HIGHRESPRECALC;
if (rendering_params->black_point_comp == gsBLACKPTCOMP_ON
|| rendering_params->black_point_comp == gsBLACKPTCOMP_ON_OR) {
flag = (flag | cmsFLAGS_BLACKPOINTCOMPENSATION);
}
return cmsCreateMultiprofileTransformTHR(ctx,
hProfiles, nProfiles, src_data_type,
des_data_type, rendering_params->rendering_intent, flag);
}
}
/* Do any initialization if needed to the CMS */
void *
gscms_create(gs_memory_t *memory)
{
cmsContext ctx;
/* Set our own error handling function */
ctx = cmsCreateContext((void *)&gs_cms_memhandler, memory);
if (ctx == NULL)
return NULL;
#ifdef USE_LCMS2_LOCKING
cmsPluginTHR(ctx, (void *)&gs_cms_mutexhandler);
#endif
cmsSetLogErrorHandlerTHR(ctx, gscms_error);
return ctx;
}
/* Do any clean up when done with the CMS if needed */
void
gscms_destroy(void *cmsContext_)
{
cmsContext ctx = (cmsContext)cmsContext_;
if (ctx == NULL)
return;
cmsDeleteContext(ctx);
}
/* Have the CMS release the link */
void
gscms_release_link(gsicc_link_t *icclink)
{
if (icclink->link_handle != NULL )
cmsDeleteTransform(icclink->link_handle);
icclink->link_handle = NULL;
}
/* Have the CMS release the profile handle */
void
gscms_release_profile(void *profile, gs_memory_t *memory)
{
cmsHPROFILE profile_handle;
profile_handle = (cmsHPROFILE) profile;
cmsCloseProfile(profile_handle);
}
/* Named color, color management */
/* Get a device value for the named color. Since there exist named color
ICC profiles and littleCMS supports them, we will use
that format in this example. However it should be noted
that this object need not be an ICC named color profile
but can be a proprietary type table. Some CMMs do not
support named color profiles. In that case, or if
the named color is not found, the caller should use an alternate
tint transform or other method. If a proprietary
format (nonICC) is being used, the operators given below must
be implemented. In every case that I can imagine, this should be
straight forward. Note that we allow the passage of a tint
value also. Currently the ICC named color profile does not provide
tint related information, only a value for 100% coverage.
It is provided here for use in proprietary
methods, which may be able to provide the desired effect. We will
at the current time apply a direct tint operation to the returned
device value.
Right now I don't see any reason to have the named color profile
ever return CIELAB. It will either return device values directly or
it will return values defined by the output device profile */
int
gscms_transform_named_color(gsicc_link_t *icclink, float tint_value,
const char* ColorName, gx_color_value device_values[] )
{
cmsHPROFILE hTransform = icclink->link_handle;
unsigned short *deviceptr = device_values;
int index;
/* Check if name is present in the profile */
/* If it is not return -1. Caller will need to use an alternate method */
if((index = cmsNamedColorIndex(hTransform, ColorName)) < 0) return -1;
/* Get the device value. */
cmsDoTransform(hTransform,&index,deviceptr,1);
return(0);
}
/* Create a link to return device values inside the named color profile or link
it with a destination profile and potentially a proofing profile. If the
output_colorspace and the proof_color space are NULL, then we will be
returning the device values that are contained in the named color profile.
i.e. in namedcolor_information. Note that an ICC named color profile
need NOT contain the device values but must contain the CIELAB values. */
void
gscms_get_name2device_link(gsicc_link_t *icclink,
gcmmhprofile_t lcms_srchandle,
gcmmhprofile_t lcms_deshandle,
gcmmhprofile_t lcms_proofhandle,
gsicc_rendering_param_t *rendering_params)
{
cmsHTRANSFORM hTransform;
cmsUInt32Number dwOutputFormat;
cmsUInt32Number lcms_proof_flag;
int number_colors;
cmsContext ctx = gs_lib_ctx_get_cms_context(icclink->memory);
/* NOTE: We need to add a test here to check that we even HAVE
device values in here and NOT just CIELAB values */
if ( lcms_proofhandle != NULL ){
lcms_proof_flag = cmsFLAGS_GAMUTCHECK | cmsFLAGS_SOFTPROOFING;
} else {
lcms_proof_flag = 0;
}
/* Create the transform */
/* ToDo: Adjust rendering intent */
hTransform = cmsCreateProofingTransformTHR(ctx,
lcms_srchandle, TYPE_NAMED_COLOR_INDEX,
lcms_deshandle, TYPE_CMYK_8,
lcms_proofhandle,INTENT_PERCEPTUAL,
INTENT_ABSOLUTE_COLORIMETRIC,
lcms_proof_flag);
/* In littleCMS there is no easy way to find out the size of the device
space returned by the named color profile until after the transform is made.
Hence we adjust our output format after creating the transform. It is
set to CMYK8 initially. */
number_colors = cmsNamedColorCount(cmsGetNamedColorList(hTransform));
/* NOTE: Output size of gx_color_value with no color space type check */
dwOutputFormat = (CHANNELS_SH(number_colors)|BYTES_SH(sizeof(gx_color_value)));
/* Change the formatters */
cmsChangeBuffersFormat(hTransform,TYPE_NAMED_COLOR_INDEX,dwOutputFormat);
icclink->link_handle = hTransform;
cmsCloseProfile(lcms_srchandle);
if(lcms_deshandle) cmsCloseProfile(lcms_deshandle);
if(lcms_proofhandle) cmsCloseProfile(lcms_proofhandle);
return;
}
bool
gscms_is_threadsafe(void)
{
return false;
}
|