J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 3 | * |
| 4 | * This code is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU General Public License version 2 only, as |
| 6 | * published by the Free Software Foundation. Sun designates this |
| 7 | * particular file as subject to the "Classpath" exception as provided |
| 8 | * by Sun in the LICENSE file that accompanied this code. |
| 9 | * |
| 10 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 13 | * version 2 for more details (a copy is included in the LICENSE file that |
| 14 | * accompanied this code). |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License version |
| 17 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 18 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 19 | * |
| 20 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 21 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 22 | * have any questions. |
| 23 | */ |
| 24 | |
| 25 | // This file is available under and governed by the GNU General Public |
| 26 | // License version 2 only, as published by the Free Software Foundation. |
| 27 | // However, the following notice accompanied the original version of this |
| 28 | // file: |
| 29 | // |
| 30 | // |
| 31 | // Little cms |
| 32 | // Copyright (C) 1998-2006 Marti Maria |
| 33 | // |
| 34 | // Permission is hereby granted, free of charge, to any person obtaining |
| 35 | // a copy of this software and associated documentation files (the "Software"), |
| 36 | // to deal in the Software without restriction, including without limitation |
| 37 | // the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 38 | // and/or sell copies of the Software, and to permit persons to whom the Software |
| 39 | // is furnished to do so, subject to the following conditions: |
| 40 | // |
| 41 | // The above copyright notice and this permission notice shall be included in |
| 42 | // all copies or substantial portions of the Software. |
| 43 | // |
| 44 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 45 | // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO |
| 46 | // THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 47 | // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE |
| 48 | // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION |
| 49 | // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
| 50 | // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 51 | |
| 52 | |
| 53 | #include "lcms.h" |
| 54 | |
| 55 | |
| 56 | // --------------------------------------------------------------------------------- |
| 57 | |
| 58 | static volatile int GlobalBlackPreservationStrategy = 0; |
| 59 | |
| 60 | // Quantize a value 0 <= i < MaxSamples |
| 61 | |
| 62 | WORD _cmsQuantizeVal(double i, int MaxSamples) |
| 63 | { |
| 64 | double x; |
| 65 | |
| 66 | x = ((double) i * 65535.) / (double) (MaxSamples - 1); |
| 67 | |
| 68 | return (WORD) floor(x + .5); |
| 69 | } |
| 70 | |
| 71 | |
| 72 | // Is a table linear? |
| 73 | |
| 74 | int cmsIsLinear(WORD Table[], int nEntries) |
| 75 | { |
| 76 | register int i; |
| 77 | int diff; |
| 78 | |
| 79 | for (i=0; i < nEntries; i++) { |
| 80 | |
| 81 | diff = abs((int) Table[i] - (int) _cmsQuantizeVal(i, nEntries)); |
| 82 | if (diff > 3) |
| 83 | return 0; |
| 84 | } |
| 85 | |
| 86 | return 1; |
| 87 | } |
| 88 | |
| 89 | |
| 90 | |
| 91 | // pow() restricted to integer |
| 92 | |
| 93 | static |
| 94 | int ipow(int base, int exp) |
| 95 | { |
| 96 | int res = base; |
| 97 | |
| 98 | while (--exp) |
| 99 | res *= base; |
| 100 | |
| 101 | return res; |
| 102 | } |
| 103 | |
| 104 | |
| 105 | // Given n, 0<=n<=clut^dim, returns the colorant. |
| 106 | |
| 107 | static |
| 108 | int ComponentOf(int n, int clut, int nColorant) |
| 109 | { |
| 110 | if (nColorant <= 0) |
| 111 | return (n % clut); |
| 112 | |
| 113 | n /= ipow(clut, nColorant); |
| 114 | |
| 115 | return (n % clut); |
| 116 | } |
| 117 | |
| 118 | |
| 119 | |
| 120 | // This routine does a sweep on whole input space, and calls its callback |
| 121 | // function on knots. returns TRUE if all ok, FALSE otherwise. |
| 122 | |
| 123 | BOOL LCMSEXPORT cmsSample3DGrid(LPLUT Lut, _cmsSAMPLER Sampler, LPVOID Cargo, DWORD dwFlags) |
| 124 | { |
| 125 | int i, t, nTotalPoints, Colorant, index; |
| 126 | WORD In[MAXCHANNELS], Out[MAXCHANNELS]; |
| 127 | |
| 128 | nTotalPoints = ipow(Lut->cLutPoints, Lut -> InputChan); |
| 129 | |
| 130 | index = 0; |
| 131 | for (i = 0; i < nTotalPoints; i++) { |
| 132 | |
| 133 | for (t=0; t < (int) Lut -> InputChan; t++) { |
| 134 | |
| 135 | Colorant = ComponentOf(i, Lut -> cLutPoints, (Lut -> InputChan - t - 1 )); |
| 136 | In[t] = _cmsQuantizeVal(Colorant, Lut -> cLutPoints); |
| 137 | } |
| 138 | |
| 139 | |
| 140 | if (dwFlags & SAMPLER_HASTL1) { |
| 141 | |
| 142 | for (t=0; t < (int) Lut -> InputChan; t++) |
| 143 | In[t] = cmsReverseLinearInterpLUT16(In[t], |
| 144 | Lut -> L1[t], |
| 145 | &Lut -> In16params); |
| 146 | } |
| 147 | |
| 148 | |
| 149 | // if (dwFlags & SAMPLER_INSPECT) { |
| 150 | |
| 151 | for (t=0; t < (int) Lut -> OutputChan; t++) |
| 152 | Out[t] = Lut->T[index + t]; |
| 153 | // } |
| 154 | |
| 155 | |
| 156 | if (!Sampler(In, Out, Cargo)) |
| 157 | return FALSE; |
| 158 | |
| 159 | if (!(dwFlags & SAMPLER_INSPECT)) { |
| 160 | |
| 161 | if (dwFlags & SAMPLER_HASTL2) { |
| 162 | |
| 163 | for (t=0; t < (int) Lut -> OutputChan; t++) |
| 164 | Out[t] = cmsReverseLinearInterpLUT16(Out[t], |
| 165 | Lut -> L2[t], |
| 166 | &Lut -> Out16params); |
| 167 | } |
| 168 | |
| 169 | |
| 170 | for (t=0; t < (int) Lut -> OutputChan; t++) |
| 171 | Lut->T[index + t] = Out[t]; |
| 172 | |
| 173 | } |
| 174 | |
| 175 | index += Lut -> OutputChan; |
| 176 | |
| 177 | } |
| 178 | |
| 179 | return TRUE; |
| 180 | } |
| 181 | |
| 182 | |
| 183 | |
| 184 | |
| 185 | |
| 186 | |
| 187 | // choose reasonable resolution |
| 188 | int _cmsReasonableGridpointsByColorspace(icColorSpaceSignature Colorspace, DWORD dwFlags) |
| 189 | { |
| 190 | int nChannels; |
| 191 | |
| 192 | // Already specified? |
| 193 | if (dwFlags & 0x00FF0000) { |
| 194 | // Yes, grab'em |
| 195 | return (dwFlags >> 16) & 0xFF; |
| 196 | } |
| 197 | |
| 198 | nChannels = _cmsChannelsOf(Colorspace); |
| 199 | |
| 200 | // HighResPrecalc is maximum resolution |
| 201 | |
| 202 | if (dwFlags & cmsFLAGS_HIGHRESPRECALC) { |
| 203 | |
| 204 | if (nChannels > 4) |
| 205 | return 7; // 7 for Hifi |
| 206 | |
| 207 | if (nChannels == 4) // 23 for CMYK |
| 208 | return 23; |
| 209 | |
| 210 | return 49; // 49 for RGB and others |
| 211 | } |
| 212 | |
| 213 | |
| 214 | // LowResPrecal is stripped resolution |
| 215 | |
| 216 | if (dwFlags & cmsFLAGS_LOWRESPRECALC) { |
| 217 | |
| 218 | if (nChannels > 4) |
| 219 | return 6; // 6 for Hifi |
| 220 | |
| 221 | if (nChannels == 1) |
| 222 | return 33; // For monochrome |
| 223 | |
| 224 | return 17; // 17 for remaining |
| 225 | } |
| 226 | |
| 227 | // Default values |
| 228 | |
| 229 | if (nChannels > 4) |
| 230 | return 7; // 7 for Hifi |
| 231 | |
| 232 | if (nChannels == 4) |
| 233 | return 17; // 17 for CMYK |
| 234 | |
| 235 | return 33; // 33 for RGB |
| 236 | |
| 237 | } |
| 238 | |
| 239 | // Sampler implemented by another transform. This is a clean way to |
| 240 | // precalculate the devicelink 3D CLUT for almost any transform |
| 241 | |
| 242 | static |
| 243 | int XFormSampler(register WORD In[], register WORD Out[], register LPVOID Cargo) |
| 244 | { |
| 245 | cmsDoTransform((cmsHTRANSFORM) Cargo, In, Out, 1); |
| 246 | return TRUE; |
| 247 | } |
| 248 | |
| 249 | // This routine does compute the devicelink CLUT containing whole |
| 250 | // transform. Handles any channel number. |
| 251 | |
| 252 | LPLUT _cmsPrecalculateDeviceLink(cmsHTRANSFORM h, DWORD dwFlags) |
| 253 | { |
| 254 | _LPcmsTRANSFORM p = (_LPcmsTRANSFORM) h; |
| 255 | LPLUT Grid; |
| 256 | int nGridPoints; |
| 257 | DWORD dwFormatIn, dwFormatOut; |
| 258 | int ChannelsIn, ChannelsOut; |
| 259 | LPLUT SaveGamutLUT; |
| 260 | |
| 261 | // Remove any gamut checking |
| 262 | SaveGamutLUT = p ->Gamut; |
| 263 | p ->Gamut = NULL; |
| 264 | |
| 265 | ChannelsIn = _cmsChannelsOf(p -> EntryColorSpace); |
| 266 | ChannelsOut = _cmsChannelsOf(p -> ExitColorSpace); |
| 267 | |
| 268 | nGridPoints = _cmsReasonableGridpointsByColorspace(p -> EntryColorSpace, dwFlags); |
| 269 | |
| 270 | Grid = cmsAllocLUT(); |
| 271 | if (!Grid) return NULL; |
| 272 | |
| 273 | Grid = cmsAlloc3DGrid(Grid, nGridPoints, ChannelsIn, ChannelsOut); |
| 274 | |
| 275 | // Compute device link on 16-bit basis |
| 276 | dwFormatIn = (CHANNELS_SH(ChannelsIn)|BYTES_SH(2)); |
| 277 | dwFormatOut = (CHANNELS_SH(ChannelsOut)|BYTES_SH(2)); |
| 278 | |
| 279 | p -> FromInput = _cmsIdentifyInputFormat(p, dwFormatIn); |
| 280 | p -> ToOutput = _cmsIdentifyOutputFormat(p, dwFormatOut); |
| 281 | |
| 282 | // Fix gamut & gamma possible mismatches. |
| 283 | |
| 284 | if (!(dwFlags & cmsFLAGS_NOPRELINEARIZATION)) { |
| 285 | |
| 286 | cmsHTRANSFORM hOne[1]; |
| 287 | hOne[0] = h; |
| 288 | |
| 289 | _cmsComputePrelinearizationTablesFromXFORM(hOne, 1, Grid); |
| 290 | } |
| 291 | |
| 292 | |
| 293 | // Attention to this typecast! we can take the luxury to |
| 294 | // do this since cmsHTRANSFORM is only an alias to a pointer |
| 295 | // to the transform struct. |
| 296 | |
| 297 | if (!cmsSample3DGrid(Grid, XFormSampler, (LPVOID) p, Grid -> wFlags)) { |
| 298 | |
| 299 | cmsFreeLUT(Grid); |
| 300 | return NULL; |
| 301 | } |
| 302 | |
| 303 | |
| 304 | p ->Gamut = SaveGamutLUT; |
| 305 | return Grid; |
| 306 | } |
| 307 | |
| 308 | |
| 309 | |
| 310 | // Sampler for Black-preserving CMYK->CMYK transforms |
| 311 | |
| 312 | typedef struct { |
| 313 | cmsHTRANSFORM cmyk2cmyk; |
| 314 | cmsHTRANSFORM cmyk2Lab; |
| 315 | LPGAMMATABLE KTone; |
| 316 | L16PARAMS KToneParams; |
| 317 | LPLUT LabK2cmyk; |
| 318 | double MaxError; |
| 319 | |
| 320 | cmsHTRANSFORM hRoundTrip; |
| 321 | int MaxTAC; |
| 322 | |
| 323 | cmsHTRANSFORM hProofOutput; |
| 324 | |
| 325 | } BPCARGO, *LPBPCARGO; |
| 326 | |
| 327 | |
| 328 | |
| 329 | // Preserve black only if that is the only ink used |
| 330 | static |
| 331 | int BlackPreservingGrayOnlySampler(register WORD In[], register WORD Out[], register LPVOID Cargo) |
| 332 | { |
| 333 | BPCARGO* bp = (LPBPCARGO) Cargo; |
| 334 | |
| 335 | // If going across black only, keep black only |
| 336 | if (In[0] == 0 && In[1] == 0 && In[2] == 0) { |
| 337 | |
| 338 | // TAC does not apply because it is black ink! |
| 339 | Out[0] = Out[1] = Out[2] = 0; |
| 340 | Out[3] = cmsLinearInterpLUT16(In[3], bp->KTone ->GammaTable, &bp->KToneParams); |
| 341 | return 1; |
| 342 | } |
| 343 | |
| 344 | // Keep normal transform for other colors |
| 345 | cmsDoTransform(bp ->cmyk2cmyk, In, Out, 1); |
| 346 | return 1; |
| 347 | } |
| 348 | |
| 349 | |
| 350 | |
| 351 | // That is our K-preserving callback. |
| 352 | static |
| 353 | int BlackPreservingSampler(register WORD In[], register WORD Out[], register LPVOID Cargo) |
| 354 | { |
| 355 | |
| 356 | WORD LabK[4]; |
| 357 | double SumCMY, SumCMYK, Error; |
| 358 | cmsCIELab ColorimetricLab, BlackPreservingLab; |
| 359 | BPCARGO* bp = (LPBPCARGO) Cargo; |
| 360 | |
| 361 | // Get the K across Tone curve |
| 362 | LabK[3] = cmsLinearInterpLUT16(In[3], bp->KTone ->GammaTable, &bp->KToneParams); |
| 363 | |
| 364 | // If going across black only, keep black only |
| 365 | if (In[0] == 0 && In[1] == 0 && In[2] == 0) { |
| 366 | |
| 367 | Out[0] = Out[1] = Out[2] = 0; |
| 368 | Out[3] = LabK[3]; |
| 369 | return 1; |
| 370 | } |
| 371 | |
| 372 | // Try the original transform, maybe K is already ok (valid on K=0) |
| 373 | cmsDoTransform(bp ->cmyk2cmyk, In, Out, 1); |
| 374 | if (Out[3] == LabK[3]) return 1; |
| 375 | |
| 376 | |
| 377 | // No, mesure and keep Lab measurement for further usage |
| 378 | cmsDoTransform(bp->hProofOutput, Out, &ColorimetricLab, 1); |
| 379 | |
| 380 | // Is not black only and the transform doesn't keep black. |
| 381 | // Obtain the Lab of CMYK. After that we have Lab + K |
| 382 | cmsDoTransform(bp ->cmyk2Lab, In, LabK, 1); |
| 383 | |
| 384 | // Obtain the corresponding CMY using reverse interpolation. |
| 385 | // As a seed, we use the colorimetric CMY |
| 386 | cmsEvalLUTreverse(bp ->LabK2cmyk, LabK, Out, Out); |
| 387 | |
| 388 | // Estimate the error |
| 389 | cmsDoTransform(bp->hProofOutput, Out, &BlackPreservingLab, 1); |
| 390 | Error = cmsDeltaE(&ColorimetricLab, &BlackPreservingLab); |
| 391 | |
| 392 | |
| 393 | // Apply TAC if needed |
| 394 | |
| 395 | SumCMY = Out[0] + Out[1] + Out[2]; |
| 396 | SumCMYK = SumCMY + Out[3]; |
| 397 | |
| 398 | if (SumCMYK > bp ->MaxTAC) { |
| 399 | |
| 400 | double Ratio = 1 - ((SumCMYK - bp->MaxTAC) / SumCMY); |
| 401 | if (Ratio < 0) |
| 402 | Ratio = 0; |
| 403 | |
| 404 | Out[0] = (WORD) floor(Out[0] * Ratio + 0.5); // C |
| 405 | Out[1] = (WORD) floor(Out[1] * Ratio + 0.5); // M |
| 406 | Out[2] = (WORD) floor(Out[2] * Ratio + 0.5); // Y |
| 407 | } |
| 408 | |
| 409 | return 1; |
| 410 | } |
| 411 | |
| 412 | |
| 413 | // Sample whole gamut to estimate maximum TAC |
| 414 | |
| 415 | #ifdef _MSC_VER |
| 416 | #pragma warning(disable : 4100) |
| 417 | #endif |
| 418 | |
| 419 | static |
| 420 | int EstimateTAC(register WORD In[], register WORD Out[], register LPVOID Cargo) |
| 421 | { |
| 422 | BPCARGO* bp = (LPBPCARGO) Cargo; |
| 423 | WORD RoundTrip[4]; |
| 424 | int Sum; |
| 425 | |
| 426 | cmsDoTransform(bp->hRoundTrip, In, RoundTrip, 1); |
| 427 | |
| 428 | Sum = RoundTrip[0] + RoundTrip[1] + RoundTrip[2] + RoundTrip[3]; |
| 429 | |
| 430 | if (Sum > bp ->MaxTAC) |
| 431 | bp ->MaxTAC = Sum; |
| 432 | |
| 433 | return 1; |
| 434 | } |
| 435 | |
| 436 | |
| 437 | // Estimate the maximum error |
| 438 | static |
| 439 | int BlackPreservingEstimateErrorSampler(register WORD In[], register WORD Out[], register LPVOID Cargo) |
| 440 | { |
| 441 | BPCARGO* bp = (LPBPCARGO) Cargo; |
| 442 | WORD ColorimetricOut[4]; |
| 443 | cmsCIELab ColorimetricLab, BlackPreservingLab; |
| 444 | double Error; |
| 445 | |
| 446 | if (In[0] == 0 && In[1] == 0 && In[2] == 0) return 1; |
| 447 | |
| 448 | cmsDoTransform(bp->cmyk2cmyk, In, ColorimetricOut, 1); |
| 449 | |
| 450 | cmsDoTransform(bp->hProofOutput, ColorimetricOut, &ColorimetricLab, 1); |
| 451 | cmsDoTransform(bp->hProofOutput, Out, &BlackPreservingLab, 1); |
| 452 | |
| 453 | Error = cmsDeltaE(&ColorimetricLab, &BlackPreservingLab); |
| 454 | |
| 455 | if (Error > bp ->MaxError) |
| 456 | bp ->MaxError = Error; |
| 457 | |
| 458 | return 1; |
| 459 | } |
| 460 | |
| 461 | // Setup the K preservation strategy |
| 462 | int LCMSEXPORT cmsSetCMYKPreservationStrategy(int n) |
| 463 | { |
| 464 | int OldVal = GlobalBlackPreservationStrategy; |
| 465 | |
| 466 | if (n >= 0) |
| 467 | GlobalBlackPreservationStrategy = n; |
| 468 | |
| 469 | return OldVal; |
| 470 | } |
| 471 | |
| 472 | |
| 473 | // Get a pointer to callback on depending of strategy |
| 474 | static |
| 475 | _cmsSAMPLER _cmsGetBlackPreservationSampler(void) |
| 476 | { |
| 477 | switch (GlobalBlackPreservationStrategy) { |
| 478 | |
| 479 | case 0: return BlackPreservingGrayOnlySampler; |
| 480 | default: return BlackPreservingSampler; |
| 481 | } |
| 482 | |
| 483 | } |
| 484 | |
| 485 | // This is the black-preserving devicelink generator |
| 486 | LPLUT _cmsPrecalculateBlackPreservingDeviceLink(cmsHTRANSFORM hCMYK2CMYK, DWORD dwFlags) |
| 487 | { |
| 488 | _LPcmsTRANSFORM p = (_LPcmsTRANSFORM) hCMYK2CMYK; |
| 489 | BPCARGO Cargo; |
| 490 | LPLUT Grid; |
| 491 | DWORD LocalFlags; |
| 492 | cmsHPROFILE hLab = cmsCreateLabProfile(NULL); |
| 493 | int nGridPoints; |
| 494 | icTagSignature Device2PCS[] = {icSigAToB0Tag, // Perceptual |
| 495 | icSigAToB1Tag, // Relative colorimetric |
| 496 | icSigAToB2Tag, // Saturation |
| 497 | icSigAToB1Tag }; // Absolute colorimetric |
| 498 | // (Relative/WhitePoint) |
| 499 | |
| 500 | nGridPoints = _cmsReasonableGridpointsByColorspace(p -> EntryColorSpace, dwFlags); |
| 501 | |
| 502 | // Get a copy of inteserting flags for this kind of xform |
| 503 | LocalFlags = cmsFLAGS_NOTPRECALC; |
| 504 | if (p -> dwOriginalFlags & cmsFLAGS_BLACKPOINTCOMPENSATION) |
| 505 | LocalFlags |= cmsFLAGS_BLACKPOINTCOMPENSATION; |
| 506 | |
| 507 | |
| 508 | // Fill in cargo struct |
| 509 | Cargo.cmyk2cmyk = hCMYK2CMYK; |
| 510 | |
| 511 | // Compute tone curve |
| 512 | Cargo.KTone = _cmsBuildKToneCurve(hCMYK2CMYK, 256); |
| 513 | if (Cargo.KTone == NULL) return NULL; |
| 514 | cmsCalcL16Params(Cargo.KTone ->nEntries, &Cargo.KToneParams); |
| 515 | |
| 516 | |
| 517 | // Create a CMYK->Lab "normal" transform on input, without K-preservation |
| 518 | Cargo.cmyk2Lab = cmsCreateTransform(p ->InputProfile, TYPE_CMYK_16, |
| 519 | hLab, TYPE_Lab_16, p->Intent, LocalFlags); |
| 520 | |
| 521 | // We are going to use the reverse of proof direction |
| 522 | Cargo.LabK2cmyk = cmsReadICCLut(p->OutputProfile, Device2PCS[p->Intent]); |
| 523 | |
| 524 | // Is there any table available? |
| 525 | if (Cargo.LabK2cmyk == NULL) { |
| 526 | |
| 527 | Grid = NULL; |
| 528 | goto Cleanup; |
| 529 | } |
| 530 | |
| 531 | // Setup a roundtrip on output profile for TAC estimation |
| 532 | Cargo.hRoundTrip = cmsCreateTransform(p ->OutputProfile, TYPE_CMYK_16, |
| 533 | p ->OutputProfile, TYPE_CMYK_16, p->Intent, cmsFLAGS_NOTPRECALC); |
| 534 | |
| 535 | |
| 536 | // Setup a proof CMYK->Lab on output |
| 537 | Cargo.hProofOutput = cmsCreateTransform(p ->OutputProfile, TYPE_CMYK_16, |
| 538 | hLab, TYPE_Lab_DBL, p->Intent, LocalFlags); |
| 539 | |
| 540 | |
| 541 | // Create an empty LUT for holding K-preserving xform |
| 542 | Grid = cmsAllocLUT(); |
| 543 | if (!Grid) goto Cleanup; |
| 544 | |
| 545 | Grid = cmsAlloc3DGrid(Grid, nGridPoints, 4, 4); |
| 546 | |
| 547 | // Setup formatters |
| 548 | p -> FromInput = _cmsIdentifyInputFormat(p, TYPE_CMYK_16); |
| 549 | p -> ToOutput = _cmsIdentifyOutputFormat(p, TYPE_CMYK_16); |
| 550 | |
| 551 | |
| 552 | |
| 553 | // Step #1, estimate TAC |
| 554 | Cargo.MaxTAC = 0; |
| 555 | if (!cmsSample3DGrid(Grid, EstimateTAC, (LPVOID) &Cargo, 0)) { |
| 556 | |
| 557 | cmsFreeLUT(Grid); |
| 558 | Grid = NULL; |
| 559 | goto Cleanup; |
| 560 | } |
| 561 | |
| 562 | |
| 563 | // Step #2, compute approximation |
| 564 | if (!cmsSample3DGrid(Grid, _cmsGetBlackPreservationSampler(), (LPVOID) &Cargo, 0)) { |
| 565 | |
| 566 | cmsFreeLUT(Grid); |
| 567 | Grid = NULL; |
| 568 | goto Cleanup; |
| 569 | } |
| 570 | |
| 571 | // Step #3, estimate error |
| 572 | Cargo.MaxError = 0; |
| 573 | cmsSample3DGrid(Grid, BlackPreservingEstimateErrorSampler, (LPVOID) &Cargo, SAMPLER_INSPECT); |
| 574 | |
| 575 | |
| 576 | Cleanup: |
| 577 | |
| 578 | if (Cargo.cmyk2Lab) cmsDeleteTransform(Cargo.cmyk2Lab); |
| 579 | if (Cargo.hRoundTrip) cmsDeleteTransform(Cargo.hRoundTrip); |
| 580 | if (Cargo.hProofOutput) cmsDeleteTransform(Cargo.hProofOutput); |
| 581 | |
| 582 | if (hLab) cmsCloseProfile(hLab); |
| 583 | if (Cargo.KTone) cmsFreeGamma(Cargo.KTone); |
| 584 | if (Cargo.LabK2cmyk) cmsFreeLUT(Cargo.LabK2cmyk); |
| 585 | |
| 586 | return Grid; |
| 587 | } |
| 588 | |
| 589 | |
| 590 | |
| 591 | // Fix broken LUT. just to obtain other CMS compatibility |
| 592 | |
| 593 | static |
| 594 | void PatchLUT(LPLUT Grid, WORD At[], WORD Value[], |
| 595 | int nChannelsOut, int nChannelsIn) |
| 596 | { |
| 597 | LPL16PARAMS p16 = &Grid -> CLut16params; |
| 598 | double px, py, pz, pw; |
| 599 | int x0, y0, z0, w0; |
| 600 | int i, index; |
| 601 | |
| 602 | |
| 603 | if (Grid ->wFlags & LUT_HASTL1) return; // There is a prelinearization |
| 604 | |
| 605 | px = ((double) At[0] * (p16->Domain)) / 65535.0; |
| 606 | py = ((double) At[1] * (p16->Domain)) / 65535.0; |
| 607 | pz = ((double) At[2] * (p16->Domain)) / 65535.0; |
| 608 | pw = ((double) At[3] * (p16->Domain)) / 65535.0; |
| 609 | |
| 610 | x0 = (int) floor(px); |
| 611 | y0 = (int) floor(py); |
| 612 | z0 = (int) floor(pz); |
| 613 | w0 = (int) floor(pw); |
| 614 | |
| 615 | if (nChannelsIn == 4) { |
| 616 | |
| 617 | if (((px - x0) != 0) || |
| 618 | ((py - y0) != 0) || |
| 619 | ((pz - z0) != 0) || |
| 620 | ((pw - w0) != 0)) return; // Not on exact node |
| 621 | |
| 622 | index = p16 -> opta4 * x0 + |
| 623 | p16 -> opta3 * y0 + |
| 624 | p16 -> opta2 * z0 + |
| 625 | p16 -> opta1 * w0; |
| 626 | } |
| 627 | else |
| 628 | if (nChannelsIn == 3) { |
| 629 | |
| 630 | if (((px - x0) != 0) || |
| 631 | ((py - y0) != 0) || |
| 632 | ((pz - z0) != 0)) return; // Not on exact node |
| 633 | |
| 634 | index = p16 -> opta3 * x0 + |
| 635 | p16 -> opta2 * y0 + |
| 636 | p16 -> opta1 * z0; |
| 637 | } |
| 638 | else |
| 639 | if (nChannelsIn == 1) { |
| 640 | |
| 641 | if (((px - x0) != 0)) return; // Not on exact node |
| 642 | |
| 643 | index = p16 -> opta1 * x0; |
| 644 | } |
| 645 | else { |
| 646 | cmsSignalError(LCMS_ERRC_ABORTED, "(internal) %d Channels are not supported on PatchLUT", nChannelsIn); |
| 647 | return; |
| 648 | } |
| 649 | |
| 650 | for (i=0; i < nChannelsOut; i++) |
| 651 | Grid -> T[index + i] = Value[i]; |
| 652 | |
| 653 | } |
| 654 | |
| 655 | |
| 656 | |
| 657 | BOOL _cmsFixWhiteMisalignment(_LPcmsTRANSFORM p) |
| 658 | { |
| 659 | |
| 660 | WORD *WhitePointIn, *WhitePointOut, *BlackPointIn, *BlackPointOut; |
| 661 | int nOuts, nIns; |
| 662 | |
| 663 | |
| 664 | if (!p -> DeviceLink) return FALSE; |
| 665 | |
| 666 | if (p ->Intent == INTENT_ABSOLUTE_COLORIMETRIC) return FALSE; |
| 667 | if ((p ->PreviewProfile != NULL) && |
| 668 | (p ->ProofIntent == INTENT_ABSOLUTE_COLORIMETRIC)) return FALSE; |
| 669 | |
| 670 | |
| 671 | if (!_cmsEndPointsBySpace(p -> EntryColorSpace, |
| 672 | &WhitePointIn, &BlackPointIn, &nIns)) return FALSE; |
| 673 | |
| 674 | |
| 675 | if (!_cmsEndPointsBySpace(p -> ExitColorSpace, |
| 676 | &WhitePointOut, &BlackPointOut, &nOuts)) return FALSE; |
| 677 | |
| 678 | // Fix white only |
| 679 | |
| 680 | PatchLUT(p -> DeviceLink, WhitePointIn, WhitePointOut, nOuts, nIns); |
| 681 | // PatchLUT(p -> DeviceLink, BlackPointIn, BlackPointOut, nOuts, nIns); |
| 682 | |
| 683 | return TRUE; |
| 684 | } |