src/color-man.cc

   1 /*
   2  * Copyright (C) 2006 John Ellis
   3  * Copyright (C) 2008 - 2016 The Geeqie Team
   4  *
   5  * Author: John Ellis
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  */
  21
  22 #include "main.h"
  23 #include "color-man.h"
  24
  25 #include "image.h"
  26 #include "ui-fileops.h"
  27
  28 #include <vector>
  29
  30 #ifdef HAVE_LCMS
  31 /*** color support enabled ***/
  32
  33 #ifdef HAVE_LCMS2
  34 #include <lcms2.h>
  35 #else
  36 #include <lcms.h>
  37 #endif
  38
  39
  40 struct ColorManCache {
  41         cmsHPROFILE   profile_in;
  42         cmsHPROFILE   profile_out;
  43         cmsHTRANSFORM transform;
  44
  45         ColorManProfileType profile_in_type;
  46         gchar *profile_in_file;
  47
  48         ColorManProfileType profile_out_type;
  49         gchar *profile_out_file;
  50
  51         gboolean has_alpha;
  52
  53         gint refcount;
  54 };
  55
  56 /* pixels to transform per idle call */
  57 #define COLOR_MAN_CHUNK_SIZE 81900
  58
  59
  60 static void color_man_lib_init()
  61 {
  62         static gboolean init_done = FALSE;
  63
  64         if (init_done) return;
  65         init_done = TRUE;
  66
  67 #ifndef HAVE_LCMS2
  68         cmsErrorAction(LCMS_ERROR_IGNORE);
  69 #endif
  70 }
  71
  72 static cmsHPROFILE color_man_create_adobe_comp()
  73 {
  74         /* ClayRGB1998 is AdobeRGB compatible */
  75 #include "ClayRGB1998_icc.h"
  76         return cmsOpenProfileFromMem(ClayRGB1998_icc, ClayRGB1998_icc_len);
  77 }
  78
  79 /*
  80  *-------------------------------------------------------------------
  81  * color transform cache
  82  *-------------------------------------------------------------------
  83  */
  84
  85 static GList *cm_cache_list = nullptr;
  86
  87
  88 static void color_man_cache_ref(ColorManCache *cc)
  89 {
  90         if (!cc) return;
  91
  92         cc->refcount++;
  93 }
  94
  95 static void color_man_cache_unref(ColorManCache *cc)
  96 {
  97         if (!cc) return;
  98
  99         cc->refcount--;
 100         if (cc->refcount < 1)
 101                 {
 102                 if (cc->transform) cmsDeleteTransform(cc->transform);
 103                 if (cc->profile_in) cmsCloseProfile(cc->profile_in);
 104                 if (cc->profile_out) cmsCloseProfile(cc->profile_out);
 105
 106                 g_free(cc->profile_in_file);
 107                 g_free(cc->profile_out_file);
 108
 109                 g_free(cc);
 110                 }
 111 }
 112
 113 static cmsHPROFILE color_man_cache_load_profile(ColorManProfileType type, const gchar *file,
 114                                                 guchar *data, guint data_len)
 115 {
 116         cmsHPROFILE profile = nullptr;
 117
 118         switch (type)
 119                 {
 120                 case COLOR_PROFILE_FILE:
 121                         if (file)
 122                                 {
 123                                 gchar *pathl;
 124
 125                                 pathl = path_from_utf8(file);
 126                                 profile = cmsOpenProfileFromFile(pathl, "r");
 127                                 g_free(pathl);
 128                                 }
 129                         break;
 130                 case COLOR_PROFILE_SRGB:
 131                         profile = cmsCreate_sRGBProfile();
 132                         break;
 133                 case COLOR_PROFILE_ADOBERGB:
 134                         profile = color_man_create_adobe_comp();
 135                         break;
 136                 case COLOR_PROFILE_MEM:
 137                         if (data)
 138                                 {
 139                                 profile = cmsOpenProfileFromMem(data, data_len);
 140                                 }
 141                         break;
 142                 case COLOR_PROFILE_NONE:
 143                 default:
 144                         break;
 145                 }
 146
 147         return profile;
 148 }
 149
 150 static ColorManCache *color_man_cache_new(ColorManProfileType in_type, const gchar *in_file,
 151                                           guchar *in_data, guint in_data_len,
 152                                           ColorManProfileType out_type, const gchar *out_file,
 153                                           guchar *out_data, guint out_data_len,
 154                                           gboolean has_alpha)
 155 {
 156         ColorManCache *cc;
 157
 158         color_man_lib_init();
 159
 160         cc = g_new0(ColorManCache, 1);
 161         cc->refcount = 1;
 162
 163         cc->profile_in_type = in_type;
 164         cc->profile_in_file = g_strdup(in_file);
 165
 166         cc->profile_out_type = out_type;
 167         cc->profile_out_file = g_strdup(out_file);
 168
 169         cc->has_alpha = has_alpha;
 170
 171         cc->profile_in = color_man_cache_load_profile(cc->profile_in_type, cc->profile_in_file,
 172                                                       in_data, in_data_len);
 173         cc->profile_out = color_man_cache_load_profile(cc->profile_out_type, cc->profile_out_file,
 174                                                        out_data, out_data_len);
 175
 176         if (!cc->profile_in || !cc->profile_out)
 177                 {
 178                 DEBUG_1("failed to load color profile for %s: %d %s",
 179                                   (!cc->profile_in) ? "input" : "screen",
 180                                   (!cc->profile_in) ? cc->profile_in_type : cc->profile_out_type,
 181                                   (!cc->profile_in) ? cc->profile_in_file : cc->profile_out_file);
 182
 183                 color_man_cache_unref(cc);
 184                 return nullptr;
 185                 }
 186
 187         cc->transform = cmsCreateTransform(cc->profile_in,
 188                                            (has_alpha) ? TYPE_RGBA_8 : TYPE_RGB_8,
 189                                            cc->profile_out,
 190                                            (has_alpha) ? TYPE_RGBA_8 : TYPE_RGB_8,
 191                                            options->color_profile.render_intent, 0);
 192
 193         if (!cc->transform)
 194                 {
 195                 DEBUG_1("failed to create color profile transform");
 196
 197                 color_man_cache_unref(cc);
 198                 return nullptr;
 199                 }
 200
 201         if (cc->profile_in_type != COLOR_PROFILE_MEM && cc->profile_out_type != COLOR_PROFILE_MEM )
 202                 {
 203                 cm_cache_list = g_list_append(cm_cache_list, cc);
 204                 color_man_cache_ref(cc);
 205                 }
 206
 207         return cc;
 208 }
 209
 210 static void color_man_cache_free(ColorManCache *cc)
 211 {
 212         if (!cc) return;
 213
 214         cm_cache_list = g_list_remove(cm_cache_list, cc);
 215         color_man_cache_unref(cc);
 216 }
 217
 218 static void color_man_cache_reset()
 219 {
 220         while (cm_cache_list)
 221                 {
 222                 ColorManCache *cc;
 223
 224                 cc = static_cast<ColorManCache *>(cm_cache_list->data);
 225                 color_man_cache_free(cc);
 226                 }
 227 }
 228
 229 static ColorManCache *color_man_cache_find(ColorManProfileType in_type, const gchar *in_file,
 230                                            ColorManProfileType out_type, const gchar *out_file,
 231                                            gboolean has_alpha)
 232 {
 233         GList *work;
 234
 235         work = cm_cache_list;
 236         while (work)
 237                 {
 238                 ColorManCache *cc;
 239                 gboolean match = FALSE;
 240
 241                 cc = static_cast<ColorManCache *>(work->data);
 242                 work = work->next;
 243
 244                 if (cc->profile_in_type == in_type &&
 245                     cc->profile_out_type == out_type &&
 246                     cc->has_alpha == has_alpha)
 247                         {
 248                         match = TRUE;
 249                         }
 250
 251                 if (match && cc->profile_in_type == COLOR_PROFILE_FILE)
 252                         {
 253                         match = (cc->profile_in_file && in_file &&
 254                                  strcmp(cc->profile_in_file, in_file) == 0);
 255                         }
 256                 if (match && cc->profile_out_type == COLOR_PROFILE_FILE)
 257                         {
 258                         match = (cc->profile_out_file && out_file &&
 259                                  strcmp(cc->profile_out_file, out_file) == 0);
 260                         }
 261
 262                 if (match) return cc;
 263                 }
 264
 265         return nullptr;
 266 }
 267
 268 static ColorManCache *color_man_cache_get(ColorManProfileType in_type, const gchar *in_file,
 269                                           guchar *in_data, guint in_data_len,
 270                                           ColorManProfileType out_type, const gchar *out_file,
 271                                           guchar *out_data, guint out_data_len,
 272                                           gboolean has_alpha)
 273 {
 274         ColorManCache *cc;
 275
 276         cc = color_man_cache_find(in_type, in_file, out_type, out_file, has_alpha);
 277         if (cc)
 278                 {
 279                 color_man_cache_ref(cc);
 280                 return cc;
 281                 }
 282
 283         return color_man_cache_new(in_type, in_file, in_data, in_data_len,
 284                                    out_type, out_file, out_data, out_data_len, has_alpha);
 285 }
 286
 287
 288 /*
 289  *-------------------------------------------------------------------
 290  * color manager
 291  *-------------------------------------------------------------------
 292  */
 293
 294 #pragma GCC diagnostic push
 295 #pragma GCC diagnostic ignored "-Wunused-function"
 296 static void color_man_done_unused(ColorMan *cm, ColorManReturnType type)
 297 {
 298         if (cm->func_done)
 299                 {
 300                 cm->func_done(cm, type, cm->func_done_data);
 301                 }
 302 }
 303 #pragma GCC diagnostic pop
 304
 305 void color_man_correct_region(ColorMan *cm, GdkPixbuf *pixbuf, gint x, gint y, gint w, gint h)
 306 {
 307         ColorManCache *cc;
 308         guchar *pix;
 309         gint rs;
 310         gint i;
 311         gint pixbuf_width, pixbuf_height;
 312
 313
 314         pixbuf_width = gdk_pixbuf_get_width(pixbuf);
 315         pixbuf_height = gdk_pixbuf_get_height(pixbuf);
 316
 317         cc = static_cast<ColorManCache *>(cm->profile);
 318
 319         pix = gdk_pixbuf_get_pixels(pixbuf);
 320         rs = gdk_pixbuf_get_rowstride(pixbuf);
 321
 322         /** @FIXME: x,y expected to be = 0. Maybe this is not the right place for scaling */
 323         w = w * scale_factor();
 324         h = h * scale_factor();
 325
 326         w = MIN(w, pixbuf_width - x);
 327         h = MIN(h, pixbuf_height - y);
 328
 329         pix += x * ((cc->has_alpha) ? 4 : 3);
 330         for (i = 0; i < h; i++)
 331                 {
 332                 guchar *pbuf;
 333
 334                 pbuf = pix + ((y + i) * rs);
 335
 336                 cmsDoTransform(cc->transform, pbuf, pbuf, w);
 337                 }
 338
 339 }
 340
 341 #pragma GCC diagnostic push
 342 #pragma GCC diagnostic ignored "-Wunused-function"
 343 static gboolean color_man_idle_cb_unused(gpointer data)
 344 {
 345         ColorMan *cm = static_cast<ColorMan *>(data);
 346         gint width, height;
 347         gint rh;
 348
 349         if (!cm->pixbuf) return FALSE;
 350
 351         if (cm->imd &&
 352             cm->pixbuf != image_get_pixbuf(cm->imd))
 353                 {
 354                 cm->idle_id = 0;
 355                 color_man_done_unused(cm, COLOR_RETURN_IMAGE_CHANGED);
 356                 return FALSE;
 357                 }
 358
 359         width = gdk_pixbuf_get_width(cm->pixbuf);
 360         height = gdk_pixbuf_get_height(cm->pixbuf);
 361
 362         if (cm->row > height)
 363                 {
 364                 if (!cm->incremental_sync && cm->imd)
 365                         {
 366                         image_area_changed(cm->imd, 0, 0, width, height);
 367                         }
 368
 369                 cm->idle_id = 0;
 370                 color_man_done_unused(cm, COLOR_RETURN_SUCCESS);
 371                 return FALSE;
 372                 }
 373
 374         rh = COLOR_MAN_CHUNK_SIZE / width + 1;
 375         color_man_correct_region(cm, cm->pixbuf, 0, cm->row, width, rh);
 376         if (cm->incremental_sync && cm->imd) image_area_changed(cm->imd, 0, cm->row, width, rh);
 377         cm->row += rh;
 378
 379         return TRUE;
 380 }
 381 #pragma GCC diagnostic pop
 382
 383 static ColorMan *color_man_new_real(ImageWindow *imd, GdkPixbuf *pixbuf,
 384                                     ColorManProfileType input_type, const gchar *input_file,
 385                                     guchar *input_data, guint input_data_len,
 386                                     ColorManProfileType screen_type, const gchar *screen_file,
 387                                     guchar *screen_data, guint screen_data_len)
 388 {
 389         ColorMan *cm;
 390         gboolean has_alpha;
 391
 392         if (imd) pixbuf = image_get_pixbuf(imd);
 393
 394         cm = g_new0(ColorMan, 1);
 395         cm->imd = imd;
 396         cm->pixbuf = pixbuf;
 397         if (cm->pixbuf) g_object_ref(cm->pixbuf);
 398
 399         has_alpha = pixbuf ? gdk_pixbuf_get_has_alpha(pixbuf) : FALSE;
 400
 401         cm->profile = color_man_cache_get(input_type, input_file, input_data, input_data_len,
 402                                           screen_type, screen_file, screen_data, screen_data_len, has_alpha);
 403         if (!cm->profile)
 404                 {
 405                 color_man_free(cm);
 406                 return nullptr;
 407                 }
 408
 409         return cm;
 410 }
 411
 412 ColorMan *color_man_new(ImageWindow *imd, GdkPixbuf *pixbuf,
 413                         ColorManProfileType input_type, const gchar *input_file,
 414                         ColorManProfileType screen_type, const gchar *screen_file,
 415                         guchar *screen_data, guint screen_data_len)
 416 {
 417         return color_man_new_real(imd, pixbuf,
 418                                   input_type, input_file, nullptr, 0,
 419                                   screen_type, screen_file, screen_data, screen_data_len);
 420 }
 421
 422 #pragma GCC diagnostic push
 423 #pragma GCC diagnostic ignored "-Wunused-function"
 424 void color_man_start_bg_unused(ColorMan *cm, ColorManDoneFunc done_func, gpointer done_data)
 425 {
 426         cm->func_done = done_func;
 427         cm->func_done_data = done_data;
 428         cm->idle_id = g_idle_add(color_man_idle_cb_unused, cm);
 429 }
 430 #pragma GCC diagnostic pop
 431
 432 ColorMan *color_man_new_embedded(ImageWindow *imd, GdkPixbuf *pixbuf,
 433                                  guchar *input_data, guint input_data_len,
 434                                  ColorManProfileType screen_type, const gchar *screen_file,
 435                                  guchar *screen_data, guint screen_data_len)
 436 {
 437         return color_man_new_real(imd, pixbuf,
 438                                   COLOR_PROFILE_MEM, nullptr, input_data, input_data_len,
 439                                   screen_type, screen_file, screen_data, screen_data_len);
 440 }
 441
 442 static gchar *color_man_get_profile_name(ColorManProfileType type, cmsHPROFILE profile)
 443 {
 444         switch (type)
 445                 {
 446                 case COLOR_PROFILE_SRGB:
 447                         return g_strdup(_("sRGB"));
 448                 case COLOR_PROFILE_ADOBERGB:
 449                         return g_strdup(_("Adobe RGB compatible"));
 450                         break;
 451                 case COLOR_PROFILE_MEM:
 452                 case COLOR_PROFILE_FILE:
 453                         if (profile)
 454                                 {
 455 #ifdef HAVE_LCMS2
 456                                 char buffer[20];
 457                                 buffer[0] = '\0';
 458                                 cmsGetProfileInfoASCII(profile, cmsInfoDescription, "en", "US", buffer, 20);
 459                                 buffer[19] = '\0'; /* Just to be sure */
 460                                 return g_strdup(buffer);
 461 #else
 462                                 return g_strdup(cmsTakeProductName(profile));
 463 #endif
 464                                 }
 465                         return g_strdup(_("Custom profile"));
 466                         break;
 467                 case COLOR_PROFILE_NONE:
 468                 default:
 469                         return g_strdup("");
 470                 }
 471 }
 472
 473 gboolean color_man_get_status(ColorMan *cm, gchar **image_profile, gchar **screen_profile)
 474 {
 475         ColorManCache *cc;
 476         if (!cm) return FALSE;
 477
 478         cc = static_cast<ColorManCache *>(cm->profile);
 479
 480         if (image_profile) *image_profile = color_man_get_profile_name(cc->profile_in_type, cc->profile_in);
 481         if (screen_profile) *screen_profile = color_man_get_profile_name(cc->profile_out_type, cc->profile_out);
 482         return TRUE;
 483 }
 484
 485 void color_man_free(ColorMan *cm)
 486 {
 487         if (!cm) return;
 488
 489         if (cm->idle_id) g_source_remove(cm->idle_id);
 490         if (cm->pixbuf) g_object_unref(cm->pixbuf);
 491
 492         color_man_cache_unref(static_cast<ColorManCache *>(cm->profile));
 493
 494         g_free(cm);
 495 }
 496
 497 void color_man_update()
 498 {
 499         color_man_cache_reset();
 500 }
 501
 502 #ifdef HAVE_HEIF
 503 #include <cmath>
 504 #include <libheif/heif.h>
 505
 506 static cmsToneCurve* colorspaces_create_transfer(int32_t size, double (*fct)(double))
 507 {
 508         std::vector<float> values;
 509         values.reserve(size);
 510         for(int32_t i = 0; i < size; ++i)
 511                 {
 512                 const double x = static_cast<float>(i) / (size - 1);
 513                 const double y = MIN(fct(x), 1.0f);
 514                 values[i] = static_cast<float>(y);
 515                 }
 516
 517         return cmsBuildTabulatedToneCurveFloat(nullptr, size, values.data());
 518 }
 519
 520 // https://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.2100-2-201807-I!!PDF-F.pdf
 521 // Hybrid Log-Gamma
 522 static double HLG_fct(double x)
 523 {
 524         static const double Beta  = 0.04;
 525         static const double RA    = 5.591816309728916; // 1.0 / A where A = 0.17883277
 526         static const double B     = 0.28466892; // 1.0 - 4.0 * A
 527         static const double C     = 0.5599107295; // 0,5 –aln(4a)
 528
 529         double e = MAX(x * (1.0 - Beta) + Beta, 0.0);
 530
 531         if(e == 0.0) return 0.0;
 532
 533         const double sign = e;
 534         e = fabs(e);
 535
 536         double res = 0.0;
 537
 538         if(e <= 0.5)
 539                 {
 540                 res = e * e / 3.0;
 541                 }
 542         else
 543                 {
 544                 res = (exp((e - C) * RA) + B) / 12.0;
 545                 }
 546
 547         return copysign(res, sign);
 548 }
 549
 550 static double PQ_fct(double x)
 551 {
 552         static const double M1 = 2610.0 / 16384.0;
 553         static const double M2 = (2523.0 / 4096.0) * 128.0;
 554         static const double C1 = 3424.0 / 4096.0;
 555         static const double C2 = (2413.0 / 4096.0) * 32.0;
 556         static const double C3 = (2392.0 / 4096.0) * 32.0;
 557
 558         if(x == 0.0) return 0.0;
 559         const double sign = x;
 560         x = fabs(x);
 561
 562         const double xpo = pow(x, 1.0 / M2);
 563         const double num = MAX(xpo - C1, 0.0);
 564         const double den = C2 - C3 * xpo;
 565         const double res = pow(num / den, 1.0 / M1);
 566
 567         return copysign(res, sign);
 568 }
 569
 570 /**
 571  * @brief
 572  * @param nclx
 573  * @param profile_len
 574  * @returns
 575  *
 576  * Copied from: gimp/libgimpcolor/gimpcolorprofile.c
 577  */
 578 static guchar *nclx_to_lcms_profile(const struct heif_color_profile_nclx *nclx, guint *profile_len)
 579 {
 580         const gchar *primaries_name = "";
 581         const gchar *trc_name = "";
 582         cmsHPROFILE *profile = nullptr;
 583         cmsCIExyY whitepoint;
 584         cmsCIExyYTRIPLE primaries;
 585         cmsToneCurve *curve[3];
 586         cmsUInt32Number size;
 587         guint8 *data = nullptr;
 588
 589         cmsFloat64Number srgb_parameters[5] =
 590         { 2.4, 1.0 / 1.055,  0.055 / 1.055, 1.0 / 12.92, 0.04045 };
 591
 592         cmsFloat64Number rec709_parameters[5] =
 593         { 2.2, 1.0 / 1.099,  0.099 / 1.099, 1.0 / 4.5, 0.081 };
 594
 595         if (nclx == nullptr)
 596                 {
 597                 return nullptr;
 598                 }
 599
 600         if (nclx->color_primaries == heif_color_primaries_unspecified)
 601                 {
 602                 return nullptr;
 603                 }
 604
 605         whitepoint.x = nclx->color_primary_white_x;
 606         whitepoint.y = nclx->color_primary_white_y;
 607         whitepoint.Y = 1.0f;
 608
 609         primaries.Red.x = nclx->color_primary_red_x;
 610         primaries.Red.y = nclx->color_primary_red_y;
 611         primaries.Red.Y = 1.0f;
 612
 613         primaries.Green.x = nclx->color_primary_green_x;
 614         primaries.Green.y = nclx->color_primary_green_y;
 615         primaries.Green.Y = 1.0f;
 616
 617         primaries.Blue.x = nclx->color_primary_blue_x;
 618         primaries.Blue.y = nclx->color_primary_blue_y;
 619         primaries.Blue.Y = 1.0f;
 620
 621         switch (nclx->color_primaries)
 622                 {
 623                 case heif_color_primaries_ITU_R_BT_709_5:
 624                         primaries_name = "BT.709";
 625                         break;
 626                 case   heif_color_primaries_ITU_R_BT_470_6_System_M:
 627                         primaries_name = "BT.470-6 System M";
 628                         break;
 629                 case heif_color_primaries_ITU_R_BT_470_6_System_B_G:
 630                         primaries_name = "BT.470-6 System BG";
 631                         break;
 632                 case heif_color_primaries_ITU_R_BT_601_6:
 633                         primaries_name = "BT.601";
 634                         break;
 635                 case heif_color_primaries_SMPTE_240M:
 636                         primaries_name = "SMPTE 240M";
 637                         break;
 638                 case heif_color_primaries_generic_film:
 639                         primaries_name = "Generic film";
 640                         break;
 641                 case heif_color_primaries_ITU_R_BT_2020_2_and_2100_0:
 642                         primaries_name = "BT.2020";
 643                         break;
 644                 case heif_color_primaries_SMPTE_ST_428_1:
 645                         primaries_name = "SMPTE ST 428-1";
 646                         break;
 647                 case heif_color_primaries_SMPTE_RP_431_2:
 648                         primaries_name = "SMPTE RP 431-2";
 649                         break;
 650                 case heif_color_primaries_SMPTE_EG_432_1:
 651                         primaries_name = "SMPTE EG 432-1 (DCI P3)";
 652                         break;
 653                 case heif_color_primaries_EBU_Tech_3213_E:
 654                         primaries_name = "EBU Tech. 3213-E";
 655                         break;
 656                 default:
 657                         log_printf("nclx unsupported color_primaries value: %d\n", nclx->color_primaries);
 658                         return nullptr;
 659                         break;
 660                 }
 661
 662         DEBUG_1("nclx primaries: %s: ", primaries_name);
 663
 664         switch (nclx->transfer_characteristics)
 665                 {
 666                 case heif_transfer_characteristic_ITU_R_BT_709_5:
 667                         curve[0] = curve[1] = curve[2] = cmsBuildParametricToneCurve(nullptr, 4, rec709_parameters);
 668                         profile = static_cast<cmsHPROFILE *>(cmsCreateRGBProfile(&whitepoint, &primaries, curve));
 669                         cmsFreeToneCurve(curve[0]);
 670                         trc_name = "Rec709 RGB";
 671                         break;
 672                 case heif_transfer_characteristic_ITU_R_BT_470_6_System_M:
 673                         curve[0] = curve[1] = curve[2] = cmsBuildGamma (nullptr, 2.2f);
 674                         profile = static_cast<cmsHPROFILE *>(cmsCreateRGBProfile(&whitepoint, &primaries, curve));
 675                         cmsFreeToneCurve(curve[0]);
 676                         trc_name = "Gamma2.2 RGB";
 677                         break;
 678                 case heif_transfer_characteristic_ITU_R_BT_470_6_System_B_G:
 679                         curve[0] = curve[1] = curve[2] = cmsBuildGamma (nullptr, 2.8f);
 680                         profile = static_cast<cmsHPROFILE *>(cmsCreateRGBProfile(&whitepoint, &primaries, curve));
 681                         cmsFreeToneCurve(curve[0]);
 682                         trc_name = "Gamma2.8 RGB";
 683                         break;
 684                 case heif_transfer_characteristic_linear:
 685                         curve[0] = curve[1] = curve[2] = cmsBuildGamma (nullptr, 1.0f);
 686                         profile = static_cast<cmsHPROFILE *>(cmsCreateRGBProfile(&whitepoint, &primaries, curve));
 687                         cmsFreeToneCurve(curve[0]);
 688                         trc_name = "linear RGB";
 689                         break;
 690                 case heif_transfer_characteristic_ITU_R_BT_2100_0_HLG:
 691                         curve[0] = curve[1] = curve[2] = colorspaces_create_transfer(4096, HLG_fct);
 692                         profile = static_cast<cmsHPROFILE *>(cmsCreateRGBProfile(&whitepoint, &primaries, curve));
 693                         cmsFreeToneCurve(curve[0]);
 694                         trc_name = "HLG Rec2020 RGB";
 695                         break;
 696                 case heif_transfer_characteristic_ITU_R_BT_2100_0_PQ:
 697                         curve[0] = curve[1] = curve[2] = colorspaces_create_transfer(4096, PQ_fct);
 698                         profile = static_cast<cmsHPROFILE *>(cmsCreateRGBProfile(&whitepoint, &primaries, curve));
 699                         cmsFreeToneCurve(curve[0]);
 700                         trc_name = "PQ Rec2020 RGB";
 701                         break;
 702                 case heif_transfer_characteristic_IEC_61966_2_1:
 703                 /* same as default */
 704                 default:
 705                         curve[0] = curve[1] = curve[2] = cmsBuildParametricToneCurve(nullptr, 4, srgb_parameters);
 706                         profile = static_cast<cmsHPROFILE *>(cmsCreateRGBProfile(&whitepoint, &primaries, curve));
 707                         cmsFreeToneCurve(curve[0]);
 708                         trc_name = "sRGB-TRC RGB";
 709                         break;
 710                 }
 711
 712         DEBUG_1("nclx transfer characteristic: %s", trc_name);
 713
 714         if (profile)
 715                 {
 716                 if (cmsSaveProfileToMem(profile, nullptr, &size))
 717                         {
 718                         data = static_cast<guint8 *>(g_malloc(size));
 719                         if (cmsSaveProfileToMem(profile, data, &size))
 720                                 {
 721                                 *profile_len = size;
 722                                 }
 723                         cmsCloseProfile(profile);
 724                         return static_cast<guchar *>(data);
 725                         }
 726                 else
 727                         {
 728                         cmsCloseProfile(profile);
 729                         return nullptr;
 730                         }
 731                 }
 732         else
 733                 {
 734                 return nullptr;
 735                 }
 736 }
 737
 738 guchar *heif_color_profile(FileData *fd, guint *profile_len)
 739 {
 740         struct heif_context* ctx;
 741         struct heif_error error_code;
 742         struct heif_image_handle* handle;
 743         struct heif_color_profile_nclx *nclxcp;
 744         gint profile_type;
 745         guchar *profile;
 746         cmsUInt32Number size;
 747         guint8 *data = nullptr;
 748
 749         ctx = heif_context_alloc();
 750         error_code = heif_context_read_from_file(ctx, fd->path, nullptr);
 751
 752         if (error_code.code)
 753                 {
 754                 log_printf("warning: heif reader error: %s\n", error_code.message);
 755                 heif_context_free(ctx);
 756                 return nullptr;
 757                 }
 758
 759         error_code = heif_context_get_primary_image_handle(ctx, &handle);
 760         if (error_code.code)
 761                 {
 762                 log_printf("warning: heif reader error: %s\n", error_code.message);
 763                 heif_context_free(ctx);
 764                 return nullptr;
 765                 }
 766
 767         nclxcp = heif_nclx_color_profile_alloc();
 768         profile_type = heif_image_handle_get_color_profile_type(handle);
 769
 770         if (profile_type == heif_color_profile_type_prof)
 771                 {
 772                 size = heif_image_handle_get_raw_color_profile_size(handle);
 773                 *profile_len = size;
 774                 data = static_cast<guint8 *>(g_malloc0(size));
 775                 error_code = heif_image_handle_get_raw_color_profile(handle, data);
 776                 if (error_code.code)
 777                         {
 778                         log_printf("warning: heif reader error: %s\n", error_code.message);
 779                         heif_context_free(ctx);
 780                         heif_nclx_color_profile_free(nclxcp);
 781                         return nullptr;
 782                         }
 783
 784                 DEBUG_1("heif color profile type: prof");
 785                 heif_context_free(ctx);
 786                 heif_nclx_color_profile_free(nclxcp);
 787
 788                 return static_cast<guchar *>(data);
 789                 }
 790         else
 791                 {
 792                 error_code = heif_image_handle_get_nclx_color_profile(handle, &nclxcp);
 793                 if (error_code.code)
 794                         {
 795                         log_printf("warning: heif reader error: %s\n", error_code.message);
 796                         heif_context_free(ctx);
 797                         heif_nclx_color_profile_free(nclxcp);
 798                         return nullptr;
 799                         }
 800
 801                 profile = nclx_to_lcms_profile(nclxcp, profile_len);
 802                 }
 803
 804         heif_context_free(ctx);
 805         heif_nclx_color_profile_free(nclxcp);
 806
 807         return profile;
 808 }
 809 #else
 810 guchar *heif_color_profile(FileData *, guint *)
 811 {
 812         return NULL;
 813 }
 814 #endif
 815
 816 #else /* define HAVE_LCMS */
 817 /*** color support not enabled ***/
 818
 819
 820 ColorMan *color_man_new(ImageWindow *, GdkPixbuf *,
 821                         ColorManProfileType, const gchar *,
 822                         ColorManProfileType, const gchar *,
 823                         guchar *, guint)
 824 {
 825         /* no op */
 826         return nullptr;
 827 }
 828
 829 ColorMan *color_man_new_embedded(ImageWindow *, GdkPixbuf *,
 830                                  guchar *, guint,
 831                                  ColorManProfileType, const gchar *,
 832                                  guchar *, guint)
 833 {
 834         /* no op */
 835         return nullptr;
 836 }
 837
 838 void color_man_free(ColorMan *)
 839 {
 840         /* no op */
 841 }
 842
 843 void color_man_update()
 844 {
 845         /* no op */
 846 }
 847
 848 void color_man_correct_region(ColorMan *, GdkPixbuf *, gint, gint, gint, gint)
 849 {
 850         /* no op */
 851 }
 852
 853 gboolean color_man_get_status(ColorMan *, gchar **, gchar **)
 854 {
 855         return FALSE;
 856 }
 857
 858 guchar *heif_color_profile(FileData *, guint *)
 859 {
 860         return nullptr;
 861 }
 862
 863 #endif /* define HAVE_LCMS */
 864 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */