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669 lines
19 KiB
C
Executable File
669 lines
19 KiB
C
Executable File
//
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// Little cms
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// Copyright (C) 1998-2007 Marti Maria
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the Software
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// is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
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// THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#include "lcms.h"
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// ---------------------------------------------------------------------------------
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static volatile int GlobalBlackPreservationStrategy = 0;
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// Quantize a value 0 <= i < MaxSamples
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WORD _cmsQuantizeVal(double i, int MaxSamples)
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{
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double x;
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x = ((double) i * 65535.) / (double) (MaxSamples - 1);
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return (WORD) floor(x + .5);
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}
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// Is a table linear?
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int cmsIsLinear(WORD Table[], int nEntries)
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{
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register int i;
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int diff;
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for (i=0; i < nEntries; i++) {
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diff = abs((int) Table[i] - (int) _cmsQuantizeVal(i, nEntries));
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if (diff > 3)
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return 0;
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}
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return 1;
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}
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// pow() restricted to integer
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static
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int ipow(int base, int exp)
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{
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int res = base;
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while (--exp)
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res *= base;
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return res;
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}
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// Given n, 0<=n<=clut^dim, returns the colorant.
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static
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int ComponentOf(int n, int clut, int nColorant)
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{
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if (nColorant <= 0)
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return (n % clut);
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n /= ipow(clut, nColorant);
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return (n % clut);
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}
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// This routine does a sweep on whole input space, and calls its callback
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// function on knots. returns TRUE if all ok, FALSE otherwise.
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LCMSBOOL LCMSEXPORT cmsSample3DGrid(LPLUT Lut, _cmsSAMPLER Sampler, LPVOID Cargo, DWORD dwFlags)
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{
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int i, t, nTotalPoints, Colorant, index;
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WORD In[MAXCHANNELS], Out[MAXCHANNELS];
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nTotalPoints = ipow(Lut->cLutPoints, Lut -> InputChan);
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index = 0;
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for (i = 0; i < nTotalPoints; i++) {
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for (t=0; t < (int) Lut -> InputChan; t++) {
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Colorant = ComponentOf(i, Lut -> cLutPoints, (Lut -> InputChan - t - 1 ));
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In[t] = _cmsQuantizeVal(Colorant, Lut -> cLutPoints);
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}
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if (dwFlags & SAMPLER_HASTL1) {
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for (t=0; t < (int) Lut -> InputChan; t++)
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In[t] = cmsReverseLinearInterpLUT16(In[t],
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Lut -> L1[t],
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&Lut -> In16params);
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}
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for (t=0; t < (int) Lut -> OutputChan; t++)
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Out[t] = Lut->T[index + t];
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if (dwFlags & SAMPLER_HASTL2) {
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for (t=0; t < (int) Lut -> OutputChan; t++)
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Out[t] = cmsLinearInterpLUT16(Out[t],
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Lut -> L2[t],
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&Lut -> Out16params);
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}
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if (!Sampler(In, Out, Cargo))
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return FALSE;
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if (!(dwFlags & SAMPLER_INSPECT)) {
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if (dwFlags & SAMPLER_HASTL2) {
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for (t=0; t < (int) Lut -> OutputChan; t++)
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Out[t] = cmsReverseLinearInterpLUT16(Out[t],
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Lut -> L2[t],
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&Lut -> Out16params);
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}
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for (t=0; t < (int) Lut -> OutputChan; t++)
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Lut->T[index + t] = Out[t];
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}
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index += Lut -> OutputChan;
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}
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return TRUE;
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}
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// choose reasonable resolution
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int _cmsReasonableGridpointsByColorspace(icColorSpaceSignature Colorspace, DWORD dwFlags)
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{
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int nChannels;
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// Already specified?
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if (dwFlags & 0x00FF0000) {
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// Yes, grab'em
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return (dwFlags >> 16) & 0xFF;
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}
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nChannels = _cmsChannelsOf(Colorspace);
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// HighResPrecalc is maximum resolution
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if (dwFlags & cmsFLAGS_HIGHRESPRECALC) {
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if (nChannels > 4)
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return 7; // 7 for Hifi
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if (nChannels == 4) // 23 for CMYK
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return 23;
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return 49; // 49 for RGB and others
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}
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// LowResPrecal is stripped resolution
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if (dwFlags & cmsFLAGS_LOWRESPRECALC) {
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if (nChannels > 4)
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return 6; // 6 for Hifi
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if (nChannels == 1)
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return 33; // For monochrome
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return 17; // 17 for remaining
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}
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// Default values
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if (nChannels > 4)
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return 7; // 7 for Hifi
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if (nChannels == 4)
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return 17; // 17 for CMYK
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return 33; // 33 for RGB
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}
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// Sampler implemented by another transform. This is a clean way to
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// precalculate the devicelink 3D CLUT for almost any transform
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static
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int XFormSampler(register WORD In[], register WORD Out[], register LPVOID Cargo)
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{
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cmsDoTransform((cmsHTRANSFORM) Cargo, In, Out, 1);
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return TRUE;
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}
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// This routine does compute the devicelink CLUT containing whole
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// transform. Handles any channel number.
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LPLUT _cmsPrecalculateDeviceLink(cmsHTRANSFORM h, DWORD dwFlags)
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{
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_LPcmsTRANSFORM p = (_LPcmsTRANSFORM) h;
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LPLUT Grid;
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int nGridPoints;
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DWORD dwFormatIn, dwFormatOut;
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DWORD SaveFormatIn, SaveFormatOut;
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int ChannelsIn, ChannelsOut;
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LPLUT SaveGamutLUT;
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// Remove any gamut checking
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SaveGamutLUT = p ->Gamut;
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p ->Gamut = NULL;
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ChannelsIn = _cmsChannelsOf(p -> EntryColorSpace);
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ChannelsOut = _cmsChannelsOf(p -> ExitColorSpace);
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nGridPoints = _cmsReasonableGridpointsByColorspace(p -> EntryColorSpace, dwFlags);
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Grid = cmsAllocLUT();
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if (!Grid) return NULL;
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Grid = cmsAlloc3DGrid(Grid, nGridPoints, ChannelsIn, ChannelsOut);
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// Compute device link on 16-bit basis
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dwFormatIn = (CHANNELS_SH(ChannelsIn)|BYTES_SH(2));
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dwFormatOut = (CHANNELS_SH(ChannelsOut)|BYTES_SH(2));
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SaveFormatIn = p ->InputFormat;
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SaveFormatOut = p ->OutputFormat;
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p -> InputFormat = dwFormatIn;
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p -> OutputFormat = dwFormatOut;
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p -> FromInput = _cmsIdentifyInputFormat(p, dwFormatIn);
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p -> ToOutput = _cmsIdentifyOutputFormat(p, dwFormatOut);
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// Fix gamut & gamma possible mismatches.
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if (!(dwFlags & cmsFLAGS_NOPRELINEARIZATION)) {
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cmsHTRANSFORM hOne[1];
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hOne[0] = h;
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_cmsComputePrelinearizationTablesFromXFORM(hOne, 1, Grid);
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}
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// Attention to this typecast! we can take the luxury to
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// do this since cmsHTRANSFORM is only an alias to a pointer
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// to the transform struct.
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if (!cmsSample3DGrid(Grid, XFormSampler, (LPVOID) p, Grid -> wFlags)) {
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cmsFreeLUT(Grid);
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Grid = NULL;
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}
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p ->Gamut = SaveGamutLUT;
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p ->InputFormat = SaveFormatIn;
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p ->OutputFormat = SaveFormatOut;
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return Grid;
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}
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// Sampler for Black-preserving CMYK->CMYK transforms
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typedef struct {
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cmsHTRANSFORM cmyk2cmyk;
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cmsHTRANSFORM cmyk2Lab;
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LPGAMMATABLE KTone;
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L16PARAMS KToneParams;
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LPLUT LabK2cmyk;
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double MaxError;
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cmsHTRANSFORM hRoundTrip;
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int MaxTAC;
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cmsHTRANSFORM hProofOutput;
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} BPCARGO, *LPBPCARGO;
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// Preserve black only if that is the only ink used
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static
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int BlackPreservingGrayOnlySampler(register WORD In[], register WORD Out[], register LPVOID Cargo)
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{
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BPCARGO* bp = (LPBPCARGO) Cargo;
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// If going across black only, keep black only
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if (In[0] == 0 && In[1] == 0 && In[2] == 0) {
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// TAC does not apply because it is black ink!
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Out[0] = Out[1] = Out[2] = 0;
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Out[3] = cmsLinearInterpLUT16(In[3], bp->KTone ->GammaTable, &bp->KToneParams);
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return 1;
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}
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// Keep normal transform for other colors
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cmsDoTransform(bp ->cmyk2cmyk, In, Out, 1);
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return 1;
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}
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// Preserve all K plane.
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static
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int BlackPreservingSampler(register WORD In[], register WORD Out[], register LPVOID Cargo)
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{
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WORD LabK[4];
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double SumCMY, SumCMYK, Error;
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cmsCIELab ColorimetricLab, BlackPreservingLab;
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BPCARGO* bp = (LPBPCARGO) Cargo;
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// Get the K across Tone curve
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LabK[3] = cmsLinearInterpLUT16(In[3], bp->KTone ->GammaTable, &bp->KToneParams);
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// If going across black only, keep black only
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if (In[0] == 0 && In[1] == 0 && In[2] == 0) {
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Out[0] = Out[1] = Out[2] = 0;
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Out[3] = LabK[3];
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return 1;
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}
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// Try the original transform, maybe K is already ok (valid on K=0)
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cmsDoTransform(bp ->cmyk2cmyk, In, Out, 1);
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if (Out[3] == LabK[3]) return 1;
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// No, mesure and keep Lab measurement for further usage
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cmsDoTransform(bp->hProofOutput, Out, &ColorimetricLab, 1);
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// Is not black only and the transform doesn't keep black.
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// Obtain the Lab of CMYK. After that we have Lab + K
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cmsDoTransform(bp ->cmyk2Lab, In, LabK, 1);
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// Obtain the corresponding CMY using reverse interpolation.
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// As a seed, we use the colorimetric CMY
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cmsEvalLUTreverse(bp ->LabK2cmyk, LabK, Out, Out);
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// Estimate the error
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cmsDoTransform(bp->hProofOutput, Out, &BlackPreservingLab, 1);
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Error = cmsDeltaE(&ColorimetricLab, &BlackPreservingLab);
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// Apply TAC if needed
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SumCMY = Out[0] + Out[1] + Out[2];
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SumCMYK = SumCMY + Out[3];
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if (SumCMYK > bp ->MaxTAC) {
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double Ratio = 1 - ((SumCMYK - bp->MaxTAC) / SumCMY);
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if (Ratio < 0)
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Ratio = 0;
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Out[0] = (WORD) floor(Out[0] * Ratio + 0.5); // C
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Out[1] = (WORD) floor(Out[1] * Ratio + 0.5); // M
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Out[2] = (WORD) floor(Out[2] * Ratio + 0.5); // Y
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}
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return 1;
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}
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// Sample whole gamut to estimate maximum TAC
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#ifdef _MSC_VER
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#pragma warning(disable : 4100)
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#endif
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static
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int EstimateTAC(register WORD In[], register WORD Out[], register LPVOID Cargo)
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{
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BPCARGO* bp = (LPBPCARGO) Cargo;
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WORD RoundTrip[4];
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int Sum;
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cmsDoTransform(bp->hRoundTrip, In, RoundTrip, 1);
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Sum = RoundTrip[0] + RoundTrip[1] + RoundTrip[2] + RoundTrip[3];
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if (Sum > bp ->MaxTAC)
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bp ->MaxTAC = Sum;
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return 1;
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}
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// Estimate the maximum error
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static
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int BlackPreservingEstimateErrorSampler(register WORD In[], register WORD Out[], register LPVOID Cargo)
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{
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BPCARGO* bp = (LPBPCARGO) Cargo;
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WORD ColorimetricOut[4];
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cmsCIELab ColorimetricLab, BlackPreservingLab;
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double Error;
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if (In[0] == 0 && In[1] == 0 && In[2] == 0) return 1;
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cmsDoTransform(bp->cmyk2cmyk, In, ColorimetricOut, 1);
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cmsDoTransform(bp->hProofOutput, ColorimetricOut, &ColorimetricLab, 1);
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cmsDoTransform(bp->hProofOutput, Out, &BlackPreservingLab, 1);
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Error = cmsDeltaE(&ColorimetricLab, &BlackPreservingLab);
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if (Error > bp ->MaxError)
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bp ->MaxError = Error;
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return 1;
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}
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// Setup the K preservation strategy
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int LCMSEXPORT cmsSetCMYKPreservationStrategy(int n)
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{
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int OldVal = GlobalBlackPreservationStrategy;
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if (n >= 0)
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GlobalBlackPreservationStrategy = n;
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return OldVal;
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}
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#pragma warning(disable: 4550)
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// Get a pointer to callback on depending of strategy
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static
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_cmsSAMPLER _cmsGetBlackPreservationSampler(void)
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{
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switch (GlobalBlackPreservationStrategy) {
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case 0: return BlackPreservingGrayOnlySampler;
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default: return BlackPreservingSampler;
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}
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}
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// This is the black-preserving devicelink generator
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LPLUT _cmsPrecalculateBlackPreservingDeviceLink(cmsHTRANSFORM hCMYK2CMYK, DWORD dwFlags)
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{
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_LPcmsTRANSFORM p = (_LPcmsTRANSFORM) hCMYK2CMYK;
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BPCARGO Cargo;
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LPLUT Grid;
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DWORD LocalFlags;
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cmsHPROFILE hLab = cmsCreateLabProfile(NULL);
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int nGridPoints;
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icTagSignature Device2PCS[] = {icSigAToB0Tag, // Perceptual
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icSigAToB1Tag, // Relative colorimetric
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icSigAToB2Tag, // Saturation
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icSigAToB1Tag }; // Absolute colorimetric
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// (Relative/WhitePoint)
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nGridPoints = _cmsReasonableGridpointsByColorspace(p -> EntryColorSpace, dwFlags);
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// Get a copy of inteserting flags for this kind of xform
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LocalFlags = cmsFLAGS_NOTPRECALC;
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if (p -> dwOriginalFlags & cmsFLAGS_BLACKPOINTCOMPENSATION)
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LocalFlags |= cmsFLAGS_BLACKPOINTCOMPENSATION;
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// Fill in cargo struct
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Cargo.cmyk2cmyk = hCMYK2CMYK;
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// Compute tone curve.
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Cargo.KTone = _cmsBuildKToneCurve(hCMYK2CMYK, 256);
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if (Cargo.KTone == NULL) return NULL;
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cmsCalcL16Params(Cargo.KTone ->nEntries, &Cargo.KToneParams);
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// Create a CMYK->Lab "normal" transform on input, without K-preservation
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Cargo.cmyk2Lab = cmsCreateTransform(p ->InputProfile, TYPE_CMYK_16,
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hLab, TYPE_Lab_16, p->Intent, LocalFlags);
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// We are going to use the reverse of proof direction
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Cargo.LabK2cmyk = cmsReadICCLut(p->OutputProfile, Device2PCS[p->Intent]);
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// Is there any table available?
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if (Cargo.LabK2cmyk == NULL) {
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Grid = NULL;
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goto Cleanup;
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}
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// Setup a roundtrip on output profile for TAC estimation
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Cargo.hRoundTrip = cmsCreateTransform(p ->OutputProfile, TYPE_CMYK_16,
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p ->OutputProfile, TYPE_CMYK_16, p->Intent, cmsFLAGS_NOTPRECALC);
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// Setup a proof CMYK->Lab on output
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Cargo.hProofOutput = cmsCreateTransform(p ->OutputProfile, TYPE_CMYK_16,
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hLab, TYPE_Lab_DBL, p->Intent, LocalFlags);
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// Create an empty LUT for holding K-preserving xform
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Grid = cmsAllocLUT();
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if (!Grid) goto Cleanup;
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Grid = cmsAlloc3DGrid(Grid, nGridPoints, 4, 4);
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// Setup formatters
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p -> FromInput = _cmsIdentifyInputFormat(p, TYPE_CMYK_16);
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p -> ToOutput = _cmsIdentifyOutputFormat(p, TYPE_CMYK_16);
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// Step #1, estimate TAC
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Cargo.MaxTAC = 0;
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if (!cmsSample3DGrid(Grid, EstimateTAC, (LPVOID) &Cargo, 0)) {
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cmsFreeLUT(Grid);
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Grid = NULL;
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goto Cleanup;
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}
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// Step #2, compute approximation
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if (!cmsSample3DGrid(Grid, _cmsGetBlackPreservationSampler(), (LPVOID) &Cargo, 0)) {
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cmsFreeLUT(Grid);
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Grid = NULL;
|
|
goto Cleanup;
|
|
}
|
|
|
|
// Step #3, estimate error
|
|
Cargo.MaxError = 0;
|
|
cmsSample3DGrid(Grid, BlackPreservingEstimateErrorSampler, (LPVOID) &Cargo, SAMPLER_INSPECT);
|
|
|
|
|
|
Cleanup:
|
|
|
|
if (Cargo.cmyk2Lab) cmsDeleteTransform(Cargo.cmyk2Lab);
|
|
if (Cargo.hRoundTrip) cmsDeleteTransform(Cargo.hRoundTrip);
|
|
if (Cargo.hProofOutput) cmsDeleteTransform(Cargo.hProofOutput);
|
|
|
|
if (hLab) cmsCloseProfile(hLab);
|
|
if (Cargo.KTone) cmsFreeGamma(Cargo.KTone);
|
|
if (Cargo.LabK2cmyk) cmsFreeLUT(Cargo.LabK2cmyk);
|
|
|
|
return Grid;
|
|
}
|
|
|
|
|
|
|
|
// Fix broken LUT. just to obtain other CMS compatibility
|
|
|
|
static
|
|
void PatchLUT(LPLUT Grid, WORD At[], WORD Value[],
|
|
int nChannelsOut, int nChannelsIn)
|
|
{
|
|
LPL16PARAMS p16 = &Grid -> CLut16params;
|
|
double px, py, pz, pw;
|
|
int x0, y0, z0, w0;
|
|
int i, index;
|
|
|
|
|
|
if (Grid ->wFlags & LUT_HASTL1) return; // There is a prelinearization
|
|
|
|
px = ((double) At[0] * (p16->Domain)) / 65535.0;
|
|
py = ((double) At[1] * (p16->Domain)) / 65535.0;
|
|
pz = ((double) At[2] * (p16->Domain)) / 65535.0;
|
|
pw = ((double) At[3] * (p16->Domain)) / 65535.0;
|
|
|
|
x0 = (int) floor(px);
|
|
y0 = (int) floor(py);
|
|
z0 = (int) floor(pz);
|
|
w0 = (int) floor(pw);
|
|
|
|
if (nChannelsIn == 4) {
|
|
|
|
if (((px - x0) != 0) ||
|
|
((py - y0) != 0) ||
|
|
((pz - z0) != 0) ||
|
|
((pw - w0) != 0)) return; // Not on exact node
|
|
|
|
index = p16 -> opta4 * x0 +
|
|
p16 -> opta3 * y0 +
|
|
p16 -> opta2 * z0 +
|
|
p16 -> opta1 * w0;
|
|
}
|
|
else
|
|
if (nChannelsIn == 3) {
|
|
|
|
if (((px - x0) != 0) ||
|
|
((py - y0) != 0) ||
|
|
((pz - z0) != 0)) return; // Not on exact node
|
|
|
|
index = p16 -> opta3 * x0 +
|
|
p16 -> opta2 * y0 +
|
|
p16 -> opta1 * z0;
|
|
}
|
|
else
|
|
if (nChannelsIn == 1) {
|
|
|
|
if (((px - x0) != 0)) return; // Not on exact node
|
|
|
|
index = p16 -> opta1 * x0;
|
|
}
|
|
else {
|
|
cmsSignalError(LCMS_ERRC_ABORTED, "(internal) %d Channels are not supported on PatchLUT", nChannelsIn);
|
|
return;
|
|
}
|
|
|
|
for (i=0; i < nChannelsOut; i++)
|
|
Grid -> T[index + i] = Value[i];
|
|
|
|
}
|
|
|
|
|
|
|
|
LCMSBOOL _cmsFixWhiteMisalignment(_LPcmsTRANSFORM p)
|
|
{
|
|
|
|
WORD *WhitePointIn, *WhitePointOut, *BlackPointIn, *BlackPointOut;
|
|
int nOuts, nIns;
|
|
|
|
|
|
if (!p -> DeviceLink) return FALSE;
|
|
|
|
if (p ->Intent == INTENT_ABSOLUTE_COLORIMETRIC) return FALSE;
|
|
if ((p ->PreviewProfile != NULL) &&
|
|
(p ->ProofIntent == INTENT_ABSOLUTE_COLORIMETRIC)) return FALSE;
|
|
|
|
|
|
if (!_cmsEndPointsBySpace(p -> EntryColorSpace,
|
|
&WhitePointIn, &BlackPointIn, &nIns)) return FALSE;
|
|
|
|
|
|
if (!_cmsEndPointsBySpace(p -> ExitColorSpace,
|
|
&WhitePointOut, &BlackPointOut, &nOuts)) return FALSE;
|
|
|
|
// Fix white only
|
|
|
|
PatchLUT(p -> DeviceLink, WhitePointIn, WhitePointOut, nOuts, nIns);
|
|
// PatchLUT(p -> DeviceLink, BlackPointIn, BlackPointOut, nOuts, nIns);
|
|
|
|
return TRUE;
|
|
}
|
|
|