Ziele Untersuchung
mit Columbo Integrität von
Datenbanken Interaktion und
Portierbarkeit Ergonomie der
Schnittstellen

Angebot Produkte Projekt Beratung

Mittel Analytik Modellierung Sprachen Algebra Logik Hardware Denken Kreativität

Zusammenhänge Gesellschaft Wirtschaft Branche Firma


products/Sources/formale Sprachen/Java/Openjdk/src/java.desktop/share/native/liblcms/ (Sun/Oracle ^©) Datei vom 13.11.2022 mit Größe 49 kB

Quelle cmsps2.c Sprache: C

/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.  Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/

// This file is available under and governed by the GNU General Public
// License version 2 only, as published by the Free Software Foundation.
// However, the following notice accompanied the original version of this
// file:
//
//---------------------------------------------------------------------------------
//
//  Little Color Management System
//  Copyright (c) 1998-2022 Marti Maria Saguer
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
//---------------------------------------------------------------------------------
//

#include "lcms2_internal.h"

// PostScript ColorRenderingDictionary and ColorSpaceArray

#define MAXPSCOLS   60      // Columns on tables

/*
    Implementation
    --------------

  PostScript does use XYZ as its internal PCS. But since PostScript
  interpolation tables are limited to 8 bits, I use Lab as a way to
  improve the accuracy, favoring perceptual results. So, for the creation
  of each CRD, CSA the profiles are converted to Lab via a device
  link between  profile -> Lab or Lab -> profile. The PS code necessary to
  convert Lab <-> XYZ is also included.

  Color Space Arrays (CSA)
  ==================================================================================

  In order to obtain precision, code chooses between three ways to implement
  the device -> XYZ transform. These cases identifies monochrome profiles (often
  implemented as a set of curves), matrix-shaper and Pipeline-based.

  Monochrome
  -----------

  This is implemented as /CIEBasedA CSA. The prelinearization curve is
  placed into /DecodeA section, and matrix equals to D50. Since here is
  no interpolation tables, I do the conversion directly to XYZ

  NOTE: CLUT-based monochrome profiles are NOT supported. So, cmsFLAGS_MATRIXINPUT
  flag is forced on such profiles.

    [ /CIEBasedA
      <<
            /DecodeA { transfer function } bind
            /MatrixA [D50]
            /RangeLMN [ 0.0 cmsD50X 0.0 cmsD50Y 0.0 cmsD50Z ]
            /WhitePoint [D50]
            /BlackPoint [BP]
            /RenderingIntent (intent)
      >>
    ]

   On simpler profiles, the PCS is already XYZ, so no conversion is required.

   Matrix-shaper based
   -------------------

   This is implemented both with /CIEBasedABC or /CIEBasedDEF depending on the
   profile implementation. Since here there are no interpolation tables, I do
   the conversion directly to XYZ

    [ /CIEBasedABC
            <<
                /DecodeABC [ {transfer1} {transfer2} {transfer3} ]
                /MatrixABC [Matrix]
                /RangeLMN [ 0.0 cmsD50X 0.0 cmsD50Y 0.0 cmsD50Z ]
                /DecodeLMN [ { / 2} dup dup ]
                /WhitePoint [D50]
                /BlackPoint [BP]
                /RenderingIntent (intent)
            >>
    ]

    CLUT based
    ----------

     Lab is used in such cases.

    [ /CIEBasedDEF
            <<
            /DecodeDEF [ <prelinearization> ]
            /Table [ p p p [<...>]]
            /RangeABC [ 0 1 0 1 0 1]
            /DecodeABC[ <postlinearization> ]
            /RangeLMN [ -0.236 1.254 0 1 -0.635 1.640 ]
               % -128/500 1+127/500 0 1  -127/200 1+128/200
            /MatrixABC [ 1 1 1 1 0 0 0 0 -1]
            /WhitePoint [D50]
            /BlackPoint [BP]
            /RenderingIntent (intent)
    ]

  Color Rendering Dictionaries (CRD)
  ==================================
  These are always implemented as CLUT, and always are using Lab. Since CRD are expected to
  be used as resources, the code adds the definition as well.

  <<
    /ColorRenderingType 1
    /WhitePoint [ D50 ]
    /BlackPoint [BP]
    /MatrixPQR [ Bradford ]
    /RangePQR [-0.125 1.375 -0.125 1.375 -0.125 1.375 ]
    /TransformPQR [
    {4 index 3 get div 2 index 3 get mul exch pop exch pop exch pop exch pop } bind
    {4 index 4 get div 2 index 4 get mul exch pop exch pop exch pop exch pop } bind
    {4 index 5 get div 2 index 5 get mul exch pop exch pop exch pop exch pop } bind
    ]
    /MatrixABC <...>
    /EncodeABC <...>
    /RangeABC  <.. used for  XYZ -> Lab>
    /EncodeLMN
    /RenderTable [ p p p [<...>]]

    /RenderingIntent (Perceptual)
  >>
  /Current exch /ColorRendering defineresource pop

  The following stages are used to convert from XYZ to Lab
  --------------------------------------------------------

  Input is given at LMN stage on X, Y, Z

  Encode LMN gives us f(X/Xn), f(Y/Yn), f(Z/Zn)

  /EncodeLMN [

    { 0.964200  div dup 0.008856 le {7.787 mul 16 116 div add}{1 3 div exp} ifelse } bind
    { 1.000000  div dup 0.008856 le {7.787 mul 16 116 div add}{1 3 div exp} ifelse } bind
    { 0.824900  div dup 0.008856 le {7.787 mul 16 116 div add}{1 3 div exp} ifelse } bind

    ]

  MatrixABC is used to compute f(Y/Yn), f(X/Xn) - f(Y/Yn), f(Y/Yn) - f(Z/Zn)

  | 0  1  0|
  | 1 -1  0|
  | 0  1 -1|

  /MatrixABC [ 0 1 0 1 -1 1 0 0 -1 ]

EncodeABC finally gives Lab values.

  /EncodeABC [
    { 116 mul  16 sub 100 div  } bind
    { 500 mul 128 add 255 div  } bind
    { 200 mul 128 add 255 div  } bind
    ]

  The following stages are used to convert Lab to XYZ
  ----------------------------------------------------

    /RangeABC [ 0 1 0 1 0 1]
    /DecodeABC [ { 100 mul 16 add 116 div } bind
                 { 255 mul 128 sub 500 div } bind
                 { 255 mul 128 sub 200 div } bind
               ]

    /MatrixABC [ 1 1 1 1 0 0 0 0 -1]
    /DecodeLMN [
                {dup 6 29 div ge {dup dup mul mul} {4 29 div sub 108 841 div mul} ifelse 0.964200 mul} bind
                {dup 6 29 div ge {dup dup mul mul} {4 29 div sub 108 841 div mul} ifelse } bind
                {dup 6 29 div ge {dup dup mul mul} {4 29 div sub 108 841 div mul} ifelse 0.824900 mul} bind
                ]

*/

/*

PostScript algorithms discussion.
=========================================================================================================

  1D interpolation algorithm

  1D interpolation (float)
  ------------------------

    val2 = Domain * Value;

    cell0 = (int) floor(val2);
    cell1 = (int) ceil(val2);

    rest = val2 - cell0;

    y0 = LutTable[cell0] ;
    y1 = LutTable[cell1] ;

    y = y0 + (y1 - y0) * rest;

  PostScript code                   Stack
  ================================================

  {                                 % v
    <check 0..1.0>
    [array]                         % v tab
    dup                             % v tab tab
    length 1 sub                    % v tab dom

    3 -1 roll                       % tab dom v

    mul                             % tab val2
    dup                             % tab val2 val2
    dup                             % tab val2 val2 val2
    floor cvi                       % tab val2 val2 cell0
    exch                            % tab val2 cell0 val2
    ceiling cvi                     % tab val2 cell0 cell1

    3 index                         % tab val2 cell0 cell1 tab
    exch                            % tab val2 cell0 tab cell1
    get                             % tab val2 cell0 y1

    4 -1 roll                       % val2 cell0 y1 tab
    3 -1 roll                       % val2 y1 tab cell0
    get                             % val2 y1 y0

    dup                             % val2 y1 y0 y0
    3 1 roll                        % val2 y0 y1 y0

    sub                             % val2 y0 (y1-y0)
    3 -1 roll                       % y0 (y1-y0) val2
    dup                             % y0 (y1-y0) val2 val2
    floor cvi                       % y0 (y1-y0) val2 floor(val2)
    sub                             % y0 (y1-y0) rest
    mul                             % y0 t1
    add                             % y
    65535 div                       % result

  } bind

*/

// This struct holds the memory block currently being write
typedef struct {
    _cmsStageCLutData* Pipeline;
    cmsIOHANDLER* m;

    int FirstComponent;
    int SecondComponent;

    const char* PreMaj;
    const char* PostMaj;
    const char* PreMin;
    const char* PostMin;

    int  FixWhite;    // Force mapping of pure white

    cmsColorSpaceSignature  ColorSpace;  // ColorSpace of profile

} cmsPsSamplerCargo;

static int _cmsPSActualColumn = 0;

// Convert to byte
static
cmsUInt8Number Word2Byte(cmsUInt16Number w)
{
    return (cmsUInt8Number) floor((cmsFloat64Number) w / 257.0 + 0.5);
}

// Write a cooked byte
static
void WriteByte(cmsIOHANDLER* m, cmsUInt8Number b)
{
    _cmsIOPrintf(m, "%02x", b);
    _cmsPSActualColumn += 2;

    if (_cmsPSActualColumn > MAXPSCOLS) {

        _cmsIOPrintf(m, "\n");
        _cmsPSActualColumn = 0;
    }
}

// ----------------------------------------------------------------- PostScript generation

// Removes offending carriage returns

static
char* RemoveCR(const char* txt)
{
    static char Buffer[2048];
    char* pt;

    strncpy(Buffer, txt, 2047);
    Buffer[2047] = 0;
    for (pt = Buffer; *pt; pt++)
            if (*pt == '\n' || *pt == '\r') *pt = ' ';

    return Buffer;

}

static
void EmitHeader(cmsIOHANDLER* m, const char* Title, cmsHPROFILE hProfile)
{
    time_t timer;
    cmsMLU *Description, *Copyright;
    char DescASCII[256], CopyrightASCII[256];

    time(&timer);

    Description = (cmsMLU*) cmsReadTag(hProfile, cmsSigProfileDescriptionTag);
    Copyright   = (cmsMLU*) cmsReadTag(hProfile, cmsSigCopyrightTag);

    DescASCII[0] = DescASCII[255] = 0;
    CopyrightASCII[0] = CopyrightASCII[255] = 0;

    if (Description != NULL) cmsMLUgetASCII(Description,  cmsNoLanguage, cmsNoCountry, DescASCII,       255);
    if (Copyright != NULL)   cmsMLUgetASCII(Copyright,    cmsNoLanguage, cmsNoCountry, CopyrightASCII,  255);

    _cmsIOPrintf(m, "%%!PS-Adobe-3.0\n");
    _cmsIOPrintf(m, "%%\n");
    _cmsIOPrintf(m, "%% %s\n", Title);
    _cmsIOPrintf(m, "%% Source: %s\n", RemoveCR(DescASCII));
    _cmsIOPrintf(m, "%% %s\n", RemoveCR(CopyrightASCII));
    _cmsIOPrintf(m, "%% Created: %s", ctime(&timer)); // ctime appends a \n!!!
    _cmsIOPrintf(m, "%%\n");
    _cmsIOPrintf(m, "%%%%BeginResource\n");

}

// Emits White & Black point. White point is always D50, Black point is the device
// Black point adapted to D50.

static
void EmitWhiteBlackD50(cmsIOHANDLER* m, cmsCIEXYZ* BlackPoint)
{

    _cmsIOPrintf(m, "/BlackPoint [%f %f %f]\n", BlackPoint -> X,
                                          BlackPoint -> Y,
                                          BlackPoint -> Z);

    _cmsIOPrintf(m, "/WhitePoint [%f %f %f]\n", cmsD50_XYZ()->X,
                                          cmsD50_XYZ()->Y,
                                          cmsD50_XYZ()->Z);
}

static
void EmitRangeCheck(cmsIOHANDLER* m)
{
    _cmsIOPrintf(m, "dup 0.0 lt { pop 0.0 } if "
                    "dup 1.0 gt { pop 1.0 } if ");

}

// Does write the intent

static
void EmitIntent(cmsIOHANDLER* m, cmsUInt32Number RenderingIntent)
{
    const char *intent;

    switch (RenderingIntent) {

        case INTENT_PERCEPTUAL:            intent = "Perceptual"; break;
        case INTENT_RELATIVE_COLORIMETRIC: intent = "RelativeColorimetric"; break;
        case INTENT_ABSOLUTE_COLORIMETRIC: intent = "AbsoluteColorimetric"; break;
        case INTENT_SATURATION:            intent = "Saturation"; break;

        default: intent = "Undefined"; break;
    }

    _cmsIOPrintf(m, "/RenderingIntent (%s)\n", intent );
}

//
//  Convert L* to Y
//
//      Y = Yn*[ (L* + 16) / 116] ^ 3   if (L*) >= 6 / 29
//        = Yn*( L* / 116) / 7.787      if (L*) < 6 / 29
//

// Lab -> XYZ, see the discussion above

static
void EmitLab2XYZ(cmsIOHANDLER* m)
{
    _cmsIOPrintf(m, "/RangeABC [ 0 1 0 1 0 1]\n");
    _cmsIOPrintf(m, "/DecodeABC [\n");
    _cmsIOPrintf(m, "{100 mul 16 add 116 div } bind\n");
    _cmsIOPrintf(m, "{255 mul 128 sub 500 div } bind\n");
    _cmsIOPrintf(m, "{255 mul 128 sub 200 div } bind\n");
    _cmsIOPrintf(m, "]\n");
    _cmsIOPrintf(m, "/MatrixABC [ 1 1 1 1 0 0 0 0 -1]\n");
    _cmsIOPrintf(m, "/RangeLMN [ -0.236 1.254 0 1 -0.635 1.640 ]\n");
    _cmsIOPrintf(m, "/DecodeLMN [\n");
    _cmsIOPrintf(m, "{dup 6 29 div ge {dup dup mul mul} {4 29 div sub 108 841 div mul} ifelse 0.964200 mul} bind\n");
    _cmsIOPrintf(m, "{dup 6 29 div ge {dup dup mul mul} {4 29 div sub 108 841 div mul} ifelse } bind\n");
    _cmsIOPrintf(m, "{dup 6 29 div ge {dup dup mul mul} {4 29 div sub 108 841 div mul} ifelse 0.824900 mul} bind\n");
    _cmsIOPrintf(m, "]\n");
}

static
void EmitSafeGuardBegin(cmsIOHANDLER* m, const char* name)
{
    _cmsIOPrintf(m, "%%LCMS2: Save previous definition of %s on the operand stack\n", name);
    _cmsIOPrintf(m, "currentdict /%s known { /%s load } { null } ifelse\n", name, name);
}

static
void EmitSafeGuardEnd(cmsIOHANDLER* m, const char* name, int depth)
{
    _cmsIOPrintf(m, "%%LCMS2: Restore previous definition of %s\n", name);
    if (depth > 1) {
        // cycle topmost items on the stack to bring the previous definition to the front
        _cmsIOPrintf(m, "%d -1 roll ", depth);
    }
    _cmsIOPrintf(m, "dup null eq { pop currentdict /%s undef } { /%s exch def } ifelse\n", name, name);
}

// Outputs a table of words. It does use 16 bits

static
void Emit1Gamma(cmsIOHANDLER* m, cmsToneCurve* Table, const char* name)
{
    cmsUInt32Number i;
    cmsFloat64Number gamma;

    if (Table == NULL) return; // Error

    if (Table ->nEntries <= 0) return;  // Empty table

    // Suppress whole if identity
    if (cmsIsToneCurveLinear(Table)) return;

    // Check if is really an exponential. If so, emit "exp"
    gamma = cmsEstimateGamma(Table, 0.001);
     if (gamma > 0) {
            _cmsIOPrintf(m, "/%s { %g exp } bind def\n", name, gamma);
            return;
     }

    EmitSafeGuardBegin(m, "lcms2gammatable");
    _cmsIOPrintf(m, "/lcms2gammatable [");

    for (i=0; i < Table->nEntries; i++) {
    if (i % 10 == 0)
            _cmsIOPrintf(m, "\n ");
        _cmsIOPrintf(m, "%d ", Table->Table16[i]);
    }

    _cmsIOPrintf(m, "] def\n");

    // Emit interpolation code

    // PostScript code                            Stack
    // ===============                            ========================
                                                  // v
    _cmsIOPrintf(m, "/%s {\n ", name);

    // Bounds check
    EmitRangeCheck(m);

    _cmsIOPrintf(m, "\n //lcms2gammatable "); // v tab
    _cmsIOPrintf(m, "dup ");                      // v tab tab
    _cmsIOPrintf(m, "length 1 sub ");             // v tab dom
    _cmsIOPrintf(m, "3 -1 roll ");                // tab dom v
    _cmsIOPrintf(m, "mul ");                      // tab val2
    _cmsIOPrintf(m, "dup ");                      // tab val2 val2
    _cmsIOPrintf(m, "dup ");                      // tab val2 val2 val2
    _cmsIOPrintf(m, "floor cvi ");                // tab val2 val2 cell0
    _cmsIOPrintf(m, "exch ");                     // tab val2 cell0 val2
    _cmsIOPrintf(m, "ceiling cvi ");              // tab val2 cell0 cell1
    _cmsIOPrintf(m, "3 index ");                  // tab val2 cell0 cell1 tab
    _cmsIOPrintf(m, "exch ");                     // tab val2 cell0 tab cell1
    _cmsIOPrintf(m, "get\n ");                   // tab val2 cell0 y1
    _cmsIOPrintf(m, "4 -1 roll ");                // val2 cell0 y1 tab
    _cmsIOPrintf(m, "3 -1 roll ");                // val2 y1 tab cell0
    _cmsIOPrintf(m, "get ");                      // val2 y1 y0
    _cmsIOPrintf(m, "dup ");                      // val2 y1 y0 y0
    _cmsIOPrintf(m, "3 1 roll ");                 // val2 y0 y1 y0
    _cmsIOPrintf(m, "sub ");                      // val2 y0 (y1-y0)
    _cmsIOPrintf(m, "3 -1 roll ");                // y0 (y1-y0) val2
    _cmsIOPrintf(m, "dup ");                      // y0 (y1-y0) val2 val2
    _cmsIOPrintf(m, "floor cvi ");                // y0 (y1-y0) val2 floor(val2)
    _cmsIOPrintf(m, "sub ");                      // y0 (y1-y0) rest
    _cmsIOPrintf(m, "mul ");                      // y0 t1
    _cmsIOPrintf(m, "add ");                      // y
    _cmsIOPrintf(m, "65535 div\n");               // result

    _cmsIOPrintf(m, "} bind def\n");

    EmitSafeGuardEnd(m, "lcms2gammatable", 1);
}

// Compare gamma table

static
cmsBool GammaTableEquals(cmsUInt16Number* g1, cmsUInt16Number* g2, cmsUInt32Number nG1, cmsUInt32Number nG2)
{
    if (nG1 != nG2) return FALSE;
    return memcmp(g1, g2, nG1 * sizeof(cmsUInt16Number)) == 0;
}

// Does write a set of gamma curves

static
void EmitNGamma(cmsIOHANDLER* m, cmsUInt32Number n, cmsToneCurve* g[], const char* nameprefix)
{
    cmsUInt32Number i;
    static char buffer[2048];

    for( i=0; i < n; i++ )
    {
        if (g[i] == NULL) return; // Error

        if (i > 0 && GammaTableEquals(g[i-1]->Table16, g[i]->Table16, g[i-1]->nEntries, g[i]->nEntries)) {

            _cmsIOPrintf(m, "/%s%d /%s%d load def\n", nameprefix, i, nameprefix, i-1);
        }
        else {
            snprintf(buffer, sizeof(buffer), "%s%d", nameprefix, (int) i);
        buffer[sizeof(buffer)-1] = '\0';
            Emit1Gamma(m, g[i], buffer);
        }
    }

}

// Following code dumps a LUT onto memory stream

// This is the sampler. Intended to work in SAMPLER_INSPECT mode,
// that is, the callback will be called for each knot with
//
//          In[]  The grid location coordinates, normalized to 0..ffff
//          Out[] The Pipeline values, normalized to 0..ffff
//
//  Returning a value other than 0 does terminate the sampling process
//
//  Each row contains Pipeline values for all but first component. So, I
//  detect row changing by keeping a copy of last value of first
//  component. -1 is used to mark beginning of whole block.

static
int OutputValueSampler(CMSREGISTER const cmsUInt16Number In[], CMSREGISTER cmsUInt16Number Out[], CMSREGISTER void* Cargo)
{
    cmsPsSamplerCargo* sc = (cmsPsSamplerCargo*) Cargo;
    cmsUInt32Number i;

    if (sc -> FixWhite) {

        if (In[0] == 0xFFFF) {  // Only in L* = 100, ab = [-8..8]

            if ((In[1] >= 0x7800 && In[1] <= 0x8800) &&
                (In[2] >= 0x7800 && In[2] <= 0x8800)) {

                cmsUInt16Number* Black;
                cmsUInt16Number* White;
                cmsUInt32Number nOutputs;

                if (!_cmsEndPointsBySpace(sc ->ColorSpace, &White, &Black, &nOutputs))
                        return 0;

                for (i=0; i < nOutputs; i++)
                        Out[i] = White[i];
            }

        }
    }

    // Hadle the parenthesis on rows

    if (In[0] != sc ->FirstComponent) {

            if (sc ->FirstComponent != -1) {

                    _cmsIOPrintf(sc ->m, sc ->PostMin);
                    sc ->SecondComponent = -1;
                    _cmsIOPrintf(sc ->m, sc ->PostMaj);
            }

            // Begin block
            _cmsPSActualColumn = 0;

            _cmsIOPrintf(sc ->m, sc ->PreMaj);
            sc ->FirstComponent = In[0];
    }

      if (In[1] != sc ->SecondComponent) {

            if (sc ->SecondComponent != -1) {

                    _cmsIOPrintf(sc ->m, sc ->PostMin);
            }

            _cmsIOPrintf(sc ->m, sc ->PreMin);
            sc ->SecondComponent = In[1];
    }

      // Dump table.

      for (i=0; i < sc -> Pipeline ->Params->nOutputs; i++) {

          cmsUInt16Number wWordOut = Out[i];
          cmsUInt8Number wByteOut;           // Value as byte

          // We always deal with Lab4

          wByteOut = Word2Byte(wWordOut);
          WriteByte(sc -> m, wByteOut);
      }

      return 1;
}

// Writes a Pipeline on memstream. Could be 8 or 16 bits based

static
void WriteCLUT(cmsIOHANDLER* m, cmsStage* mpe, const char* PreMaj,
                                               const char* PostMaj,
                                               const char* PreMin,
                                               const char* PostMin,
                                               int FixWhite,
                                               cmsColorSpaceSignature ColorSpace)
{
    cmsUInt32Number i;
    cmsPsSamplerCargo sc;

    sc.FirstComponent = -1;
    sc.SecondComponent = -1;
    sc.Pipeline = (_cmsStageCLutData *) mpe ->Data;
    sc.m   = m;
    sc.PreMaj = PreMaj;
    sc.PostMaj= PostMaj;

    sc.PreMin   = PreMin;
    sc.PostMin  = PostMin;
    sc.FixWhite = FixWhite;
    sc.ColorSpace = ColorSpace;

    _cmsIOPrintf(m, "[");

    for (i=0; i < sc.Pipeline->Params->nInputs; i++)
        _cmsIOPrintf(m, " %d ", sc.Pipeline->Params->nSamples[i]);

    _cmsIOPrintf(m, " [\n");

    cmsStageSampleCLut16bit(mpe, OutputValueSampler, (void*) &sc, SAMPLER_INSPECT);

    _cmsIOPrintf(m, PostMin);
    _cmsIOPrintf(m, PostMaj);
    _cmsIOPrintf(m, "] ");

}

// Dumps CIEBasedA Color Space Array

static
int EmitCIEBasedA(cmsIOHANDLER* m, cmsToneCurve* Curve, cmsCIEXYZ* BlackPoint)
{

    _cmsIOPrintf(m, "[ /CIEBasedA\n");
    _cmsIOPrintf(m, " <<\n");

    EmitSafeGuardBegin(m, "lcms2gammaproc");
    Emit1Gamma(m, Curve, "lcms2gammaproc");

    _cmsIOPrintf(m, "/DecodeA /lcms2gammaproc load\n");
    EmitSafeGuardEnd(m, "lcms2gammaproc", 3);

    _cmsIOPrintf(m, "/MatrixA [ 0.9642 1.0000 0.8249 ]\n");
    _cmsIOPrintf(m, "/RangeLMN [ 0.0 0.9642 0.0 1.0000 0.0 0.8249 ]\n");

    EmitWhiteBlackD50(m, BlackPoint);
    EmitIntent(m, INTENT_PERCEPTUAL);

    _cmsIOPrintf(m, ">>\n");
    _cmsIOPrintf(m, "]\n");

    return 1;
}

// Dumps CIEBasedABC Color Space Array

static
int EmitCIEBasedABC(cmsIOHANDLER* m, cmsFloat64Number* Matrix, cmsToneCurve** CurveSet, cmsCIEXYZ* BlackPoint)
{
    int i;

    _cmsIOPrintf(m, "[ /CIEBasedABC\n");
    _cmsIOPrintf(m, "<<\n");

    EmitSafeGuardBegin(m, "lcms2gammaproc0");
    EmitSafeGuardBegin(m, "lcms2gammaproc1");
    EmitSafeGuardBegin(m, "lcms2gammaproc2");
    EmitNGamma(m, 3, CurveSet, "lcms2gammaproc");
    _cmsIOPrintf(m, "/DecodeABC [\n");
    _cmsIOPrintf(m, " /lcms2gammaproc0 load\n");
    _cmsIOPrintf(m, " /lcms2gammaproc1 load\n");
    _cmsIOPrintf(m, " /lcms2gammaproc2 load\n");
    _cmsIOPrintf(m, "]\n");
    EmitSafeGuardEnd(m, "lcms2gammaproc2", 3);
    EmitSafeGuardEnd(m, "lcms2gammaproc1", 3);
    EmitSafeGuardEnd(m, "lcms2gammaproc0", 3);

    _cmsIOPrintf(m, "/MatrixABC [ " );

    for( i=0; i < 3; i++ ) {

        _cmsIOPrintf(m, "%.6f %.6f %.6f ", Matrix[i + 3*0],
                                           Matrix[i + 3*1],
                                           Matrix[i + 3*2]);
    }

    _cmsIOPrintf(m, "]\n");

    _cmsIOPrintf(m, "/RangeLMN [ 0.0 0.9642 0.0 1.0000 0.0 0.8249 ]\n");

    EmitWhiteBlackD50(m, BlackPoint);
    EmitIntent(m, INTENT_PERCEPTUAL);

    _cmsIOPrintf(m, ">>\n");
    _cmsIOPrintf(m, "]\n");

    return 1;
}

static
int EmitCIEBasedDEF(cmsIOHANDLER* m, cmsPipeline* Pipeline, cmsUInt32Number Intent, cmsCIEXYZ* BlackPoint)
{
    const char* PreMaj;
    const char* PostMaj;
    const char* PreMin, * PostMin;
    cmsStage* mpe;
    int i, numchans;
    static char buffer[2048];

    mpe = Pipeline->Elements;

    switch (cmsStageInputChannels(mpe)) {
    case 3:
        _cmsIOPrintf(m, "[ /CIEBasedDEF\n");
        PreMaj = "<";
        PostMaj = ">\n";
        PreMin = PostMin = "";
        break;

    case 4:
        _cmsIOPrintf(m, "[ /CIEBasedDEFG\n");
        PreMaj = "[";
        PostMaj = "]\n";
        PreMin = "<";
        PostMin = ">\n";
        break;

    default:
        return 0;

    }

    _cmsIOPrintf(m, "<<\n");

    if (cmsStageType(mpe) == cmsSigCurveSetElemType) {

        numchans = (int) cmsStageOutputChannels(mpe);
        for (i = 0; i < numchans; ++i) {
            snprintf(buffer, sizeof(buffer), "lcms2gammaproc%d", i);
            buffer[sizeof(buffer) - 1] = '\0';
            EmitSafeGuardBegin(m, buffer);
        }
        EmitNGamma(m, cmsStageOutputChannels(mpe), _cmsStageGetPtrToCurveSet(mpe), "lcms2gammaproc");
        _cmsIOPrintf(m, "/DecodeDEF [\n");
        for (i = 0; i < numchans; ++i) {
            snprintf(buffer, sizeof(buffer), " /lcms2gammaproc%d load\n", i);
            buffer[sizeof(buffer) - 1] = '\0';
            _cmsIOPrintf(m, buffer);
        }
        _cmsIOPrintf(m, "]\n");
        for (i = numchans - 1; i >= 0; --i) {
            snprintf(buffer, sizeof(buffer), "lcms2gammaproc%d", i);
            buffer[sizeof(buffer) - 1] = '\0';
            EmitSafeGuardEnd(m, buffer, 3);
        }

        mpe = mpe->Next;
    }

    if (cmsStageType(mpe) == cmsSigCLutElemType) {

        _cmsIOPrintf(m, "/Table ");
        WriteCLUT(m, mpe, PreMaj, PostMaj, PreMin, PostMin, FALSE, (cmsColorSpaceSignature)0);
        _cmsIOPrintf(m, "]\n");
    }

    EmitLab2XYZ(m);
    EmitWhiteBlackD50(m, BlackPoint);
    EmitIntent(m, Intent);

    _cmsIOPrintf(m, " >>\n");
    _cmsIOPrintf(m, "]\n");

    return 1;
}

// Generates a curve from a gray profile

static
cmsToneCurve* ExtractGray2Y(cmsContext ContextID, cmsHPROFILE hProfile, cmsUInt32Number Intent)
{
    cmsToneCurve* Out = cmsBuildTabulatedToneCurve16(ContextID, 256, NULL);
    cmsHPROFILE hXYZ  = cmsCreateXYZProfile();
    cmsHTRANSFORM xform = cmsCreateTransformTHR(ContextID, hProfile, TYPE_GRAY_8, hXYZ, TYPE_XYZ_DBL, Intent, cmsFLAGS_NOOPTIMIZE);
    int i;

    if (Out != NULL && xform != NULL) {
        for (i=0; i < 256; i++) {

            cmsUInt8Number Gray = (cmsUInt8Number) i;
            cmsCIEXYZ XYZ;

            cmsDoTransform(xform, &Gray, &XYZ, 1);

            Out ->Table16[i] =_cmsQuickSaturateWord(XYZ.Y * 65535.0);
        }
    }

    if (xform) cmsDeleteTransform(xform);
    if (hXYZ) cmsCloseProfile(hXYZ);
    return Out;
}

// Because PostScript has only 8 bits in /Table, we should use
// a more perceptually uniform space... I do choose Lab.

static
int WriteInputLUT(cmsIOHANDLER* m, cmsHPROFILE hProfile, cmsUInt32Number Intent, cmsUInt32Number dwFlags)
{
    cmsHPROFILE hLab;
    cmsHTRANSFORM xform;
    cmsUInt32Number nChannels;
    cmsUInt32Number InputFormat;
    int rc;
    cmsHPROFILE Profiles[2];
    cmsCIEXYZ BlackPointAdaptedToD50;

    // Does create a device-link based transform.
    // The DeviceLink is next dumped as working CSA.

    InputFormat = cmsFormatterForColorspaceOfProfile(hProfile, 2, FALSE);
    nChannels   = T_CHANNELS(InputFormat);

    cmsDetectBlackPoint(&BlackPointAdaptedToD50, hProfile, Intent, 0);

    // Adjust output to Lab4
    hLab = cmsCreateLab4ProfileTHR(m ->ContextID, NULL);

    Profiles[0] = hProfile;
    Profiles[1] = hLab;

    xform = cmsCreateMultiprofileTransform(Profiles, 2,  InputFormat, TYPE_Lab_DBL, Intent, 0);
    cmsCloseProfile(hLab);

    if (xform == NULL) {

        cmsSignalError(m ->ContextID, cmsERROR_COLORSPACE_CHECK, "Cannot create transform Profile -> Lab");
        return 0;
    }

    // Only 1, 3 and 4 channels are allowed

    switch (nChannels) {

    case 1: {
            cmsToneCurve* Gray2Y = ExtractGray2Y(m ->ContextID, hProfile, Intent);
            EmitCIEBasedA(m, Gray2Y, &BlackPointAdaptedToD50);
            cmsFreeToneCurve(Gray2Y);
            }
            break;

    case 3:
    case 4: {
            cmsUInt32Number OutFrm = TYPE_Lab_16;
            cmsPipeline* DeviceLink;
            _cmsTRANSFORM* v = (_cmsTRANSFORM*) xform;

            DeviceLink = cmsPipelineDup(v ->Lut);
            if (DeviceLink == NULL) return 0;

            dwFlags |= cmsFLAGS_FORCE_CLUT;
            _cmsOptimizePipeline(m->ContextID, &DeviceLink, Intent, &InputFormat, &OutFrm, &dwFlags);

            rc = EmitCIEBasedDEF(m, DeviceLink, Intent, &BlackPointAdaptedToD50);
            cmsPipelineFree(DeviceLink);
            if (rc == 0) return 0;
            }
            break;

    default:

        cmsSignalError(m ->ContextID, cmsERROR_COLORSPACE_CHECK, "Only 3, 4 channels are supported for CSA. This profile has %d channels.", nChannels);
        return 0;
    }

    cmsDeleteTransform(xform);

    return 1;
}

static
cmsFloat64Number* GetPtrToMatrix(const cmsStage* mpe)
{
    _cmsStageMatrixData* Data = (_cmsStageMatrixData*) mpe ->Data;

    return Data -> Double;
}

// Does create CSA based on matrix-shaper. Allowed types are gray and RGB based
static
int WriteInputMatrixShaper(cmsIOHANDLER* m, cmsHPROFILE hProfile, cmsStage* Matrix, cmsStage* Shaper)
{
    cmsColorSpaceSignature ColorSpace;
    int rc;
    cmsCIEXYZ BlackPointAdaptedToD50;

    ColorSpace = cmsGetColorSpace(hProfile);

    cmsDetectBlackPoint(&BlackPointAdaptedToD50, hProfile, INTENT_RELATIVE_COLORIMETRIC, 0);

    if (ColorSpace == cmsSigGrayData) {

        cmsToneCurve** ShaperCurve = _cmsStageGetPtrToCurveSet(Shaper);
        rc = EmitCIEBasedA(m, ShaperCurve[0], &BlackPointAdaptedToD50);

    }
    else
        if (ColorSpace == cmsSigRgbData) {

            cmsMAT3 Mat;
            int i, j;

            memmove(&Mat, GetPtrToMatrix(Matrix), sizeof(Mat));

            for (i = 0; i < 3; i++)
                for (j = 0; j < 3; j++)
                    Mat.v[i].n[j] *= MAX_ENCODEABLE_XYZ;

            rc = EmitCIEBasedABC(m, (cmsFloat64Number *)&Mat,
                _cmsStageGetPtrToCurveSet(Shaper),
                &BlackPointAdaptedToD50);
        }
        else {

            cmsSignalError(m->ContextID, cmsERROR_COLORSPACE_CHECK, "Profile is not suitable for CSA. Unsupported colorspace.");
            return 0;
        }

    return rc;
}

// Creates a PostScript color list from a named profile data.
// This is a HP extension, and it works in Lab instead of XYZ

static
int WriteNamedColorCSA(cmsIOHANDLER* m, cmsHPROFILE hNamedColor, cmsUInt32Number Intent)
{
    cmsHTRANSFORM xform;
    cmsHPROFILE   hLab;
    cmsUInt32Number i, nColors;
    char ColorName[cmsMAX_PATH];
    cmsNAMEDCOLORLIST* NamedColorList;

    hLab  = cmsCreateLab4ProfileTHR(m ->ContextID, NULL);
    xform = cmsCreateTransform(hNamedColor, TYPE_NAMED_COLOR_INDEX, hLab, TYPE_Lab_DBL, Intent, 0);
    if (xform == NULL) return 0;

    NamedColorList = cmsGetNamedColorList(xform);
    if (NamedColorList == NULL) return 0;

    _cmsIOPrintf(m, "<<\n");
    _cmsIOPrintf(m, "(colorlistcomment) (%s)\n", "Named color CSA");
    _cmsIOPrintf(m, "(Prefix) [ (Pantone ) (PANTONE ) ]\n");
    _cmsIOPrintf(m, "(Suffix) [ ( CV) ( CVC) ( C) ]\n");

    nColors   = cmsNamedColorCount(NamedColorList);

    for (i=0; i < nColors; i++) {

        cmsUInt16Number In[1];
        cmsCIELab Lab;

        In[0] = (cmsUInt16Number) i;

        if (!cmsNamedColorInfo(NamedColorList, i, ColorName, NULL, NULL, NULL, NULL))
                continue;

        cmsDoTransform(xform, In, &Lab, 1);
        _cmsIOPrintf(m, " (%s) [ %.3f %.3f %.3f ]\n", ColorName, Lab.L, Lab.a, Lab.b);
    }

    _cmsIOPrintf(m, ">>\n");

    cmsDeleteTransform(xform);
    cmsCloseProfile(hLab);
    return 1;
}

// Does create a Color Space Array on XYZ colorspace for PostScript usage
static
cmsUInt32Number GenerateCSA(cmsContext ContextID,
                            cmsHPROFILE hProfile,
                            cmsUInt32Number Intent,
                            cmsUInt32Number dwFlags,
                            cmsIOHANDLER* mem)
{
    cmsUInt32Number dwBytesUsed;
    cmsPipeline* lut = NULL;
    cmsStage* Matrix, *Shaper;

    // Is a named color profile?
    if (cmsGetDeviceClass(hProfile) == cmsSigNamedColorClass) {

        if (!WriteNamedColorCSA(mem, hProfile, Intent)) goto Error;
    }
    else {

        // Any profile class are allowed (including devicelink), but
        // output (PCS) colorspace must be XYZ or Lab
        cmsColorSpaceSignature ColorSpace = cmsGetPCS(hProfile);

        if (ColorSpace != cmsSigXYZData &&
            ColorSpace != cmsSigLabData) {

                cmsSignalError(ContextID, cmsERROR_COLORSPACE_CHECK, "Invalid output color space");
                goto Error;
        }

        // Read the lut with all necessary conversion stages
        lut = _cmsReadInputLUT(hProfile, Intent);
        if (lut == NULL) goto Error;

        // Tone curves + matrix can be implemented without any LUT
        if (cmsPipelineCheckAndRetreiveStages(lut, 2, cmsSigCurveSetElemType, cmsSigMatrixElemType, &Shaper, &Matrix)) {

            if (!WriteInputMatrixShaper(mem, hProfile, Matrix, Shaper)) goto Error;

        }
        else {
           // We need a LUT for the rest
           if (!WriteInputLUT(mem, hProfile, Intent, dwFlags)) goto Error;
        }
    }

    // Done, keep memory usage
    dwBytesUsed = mem ->UsedSpace;

    // Get rid of LUT
    if (lut != NULL) cmsPipelineFree(lut);

    // Finally, return used byte count
    return dwBytesUsed;

Error:
    if (lut != NULL) cmsPipelineFree(lut);
    return 0;
}

// ------------------------------------------------------ Color Rendering Dictionary (CRD)

/*

  Black point compensation plus chromatic adaptation:

  Step 1 - Chromatic adaptation
  =============================

          WPout
    X = ------- PQR
          Wpin

  Step 2 - Black point compensation
  =================================

          (WPout - BPout)*X - WPout*(BPin - BPout)
    out = ---------------------------------------
                        WPout - BPin

  Algorithm discussion
  ====================

  TransformPQR(WPin, BPin, WPout, BPout, PQR)

  Wpin,etc= { Xws Yws Zws Pws Qws Rws }

  Algorithm             Stack 0...n
  ===========================================================
                        PQR BPout WPout BPin WPin
  4 index 3 get         WPin PQR BPout WPout BPin WPin
  div                   (PQR/WPin) BPout WPout BPin WPin
  2 index 3 get         WPout (PQR/WPin) BPout WPout BPin WPin
  mult                  WPout*(PQR/WPin) BPout WPout BPin WPin

  2 index 3 get         WPout WPout*(PQR/WPin) BPout WPout BPin WPin
  2 index 3 get         BPout WPout WPout*(PQR/WPin) BPout WPout BPin WPin
  sub                   (WPout-BPout) WPout*(PQR/WPin) BPout WPout BPin WPin
  mult                  (WPout-BPout)* WPout*(PQR/WPin) BPout WPout BPin WPin

  2 index 3 get         WPout (BPout-WPout)* WPout*(PQR/WPin) BPout WPout BPin WPin
  4 index 3 get         BPin WPout (BPout-WPout)* WPout*(PQR/WPin) BPout WPout BPin WPin
  3 index 3 get         BPout BPin WPout (BPout-WPout)* WPout*(PQR/WPin) BPout WPout BPin WPin

  sub                   (BPin-BPout) WPout (BPout-WPout)* WPout*(PQR/WPin) BPout WPout BPin WPin
  mult                  (BPin-BPout)*WPout (BPout-WPout)* WPout*(PQR/WPin) BPout WPout BPin WPin
  sub                   (BPout-WPout)* WPout*(PQR/WPin)-(BPin-BPout)*WPout BPout WPout BPin WPin

  3 index 3 get         BPin (BPout-WPout)* WPout*(PQR/WPin)-(BPin-BPout)*WPout BPout WPout BPin WPin
  3 index 3 get         WPout BPin (BPout-WPout)* WPout*(PQR/WPin)-(BPin-BPout)*WPout BPout WPout BPin WPin
  exch
  sub                   (WPout-BPin) (BPout-WPout)* WPout*(PQR/WPin)-(BPin-BPout)*WPout BPout WPout BPin WPin
  div

  exch pop
  exch pop
  exch pop
  exch pop

*/

static
void EmitPQRStage(cmsIOHANDLER* m, cmsHPROFILE hProfile, int DoBPC, int lIsAbsolute)
{

        if (lIsAbsolute) {

            // For absolute colorimetric intent, encode back to relative
            // and generate a relative Pipeline

            // Relative encoding is obtained across XYZpcs*(D50/WhitePoint)

            cmsCIEXYZ White;

            _cmsReadMediaWhitePoint(&White, hProfile);

            _cmsIOPrintf(m,"/MatrixPQR [1 0 0 0 1 0 0 0 1 ]\n");
            _cmsIOPrintf(m,"/RangePQR [ -0.5 2 -0.5 2 -0.5 2 ]\n");

            _cmsIOPrintf(m, "%% Absolute colorimetric -- encode to relative to maximize LUT usage\n"
                      "/TransformPQR [\n"
                      "{0.9642 mul %g div exch pop exch pop exch pop exch pop} bind\n"
                      "{1.0000 mul %g div exch pop exch pop exch pop exch pop} bind\n"
                      "{0.8249 mul %g div exch pop exch pop exch pop exch pop} bind\n]\n",
                      White.X, White.Y, White.Z);
            return;
        }

        _cmsIOPrintf(m,"%% Bradford Cone Space\n"
                 "/MatrixPQR [0.8951 -0.7502 0.0389 0.2664 1.7135 -0.0685 -0.1614 0.0367 1.0296 ] \n");

        _cmsIOPrintf(m, "/RangePQR [ -0.5 2 -0.5 2 -0.5 2 ]\n");

        // No BPC

        if (!DoBPC) {

            _cmsIOPrintf(m, "%% VonKries-like transform in Bradford Cone Space\n"
                      "/TransformPQR [\n"
                      "{exch pop exch 3 get mul exch pop exch 3 get div} bind\n"
                      "{exch pop exch 4 get mul exch pop exch 4 get div} bind\n"
                      "{exch pop exch 5 get mul exch pop exch 5 get div} bind\n]\n");
        } else {

            // BPC

            _cmsIOPrintf(m, "%% VonKries-like transform in Bradford Cone Space plus BPC\n"
                      "/TransformPQR [\n");

            _cmsIOPrintf(m, "{4 index 3 get div 2 index 3 get mul "
                    "2 index 3 get 2 index 3 get sub mul "
                    "2 index 3 get 4 index 3 get 3 index 3 get sub mul sub "
                    "3 index 3 get 3 index 3 get exch sub div "
                    "exch pop exch pop exch pop exch pop } bind\n");

            _cmsIOPrintf(m, "{4 index 4 get div 2 index 4 get mul "
                    "2 index 4 get 2 index 4 get sub mul "
                    "2 index 4 get 4 index 4 get 3 index 4 get sub mul sub "
                    "3 index 4 get 3 index 4 get exch sub div "
                    "exch pop exch pop exch pop exch pop } bind\n");

            _cmsIOPrintf(m, "{4 index 5 get div 2 index 5 get mul "
                    "2 index 5 get 2 index 5 get sub mul "
                    "2 index 5 get 4 index 5 get 3 index 5 get sub mul sub "
                    "3 index 5 get 3 index 5 get exch sub div "
                    "exch pop exch pop exch pop exch pop } bind\n]\n");

        }
}

static
void EmitXYZ2Lab(cmsIOHANDLER* m)
{
    _cmsIOPrintf(m, "/RangeLMN [ -0.635 2.0 0 2 -0.635 2.0 ]\n");
    _cmsIOPrintf(m, "/EncodeLMN [\n");
    _cmsIOPrintf(m, "{ 0.964200 div dup 0.008856 le {7.787 mul 16 116 div add}{1 3 div exp} ifelse } bind\n");
    _cmsIOPrintf(m, "{ 1.000000 div dup 0.008856 le {7.787 mul 16 116 div add}{1 3 div exp} ifelse } bind\n");
    _cmsIOPrintf(m, "{ 0.824900 div dup 0.008856 le {7.787 mul 16 116 div add}{1 3 div exp} ifelse } bind\n");
    _cmsIOPrintf(m, "]\n");
    _cmsIOPrintf(m, "/MatrixABC [ 0 1 0 1 -1 1 0 0 -1 ]\n");
    _cmsIOPrintf(m, "/EncodeABC [\n");

    _cmsIOPrintf(m, "{ 116 mul 16 sub 100 div } bind\n");
    _cmsIOPrintf(m, "{ 500 mul 128 add 256 div } bind\n");
    _cmsIOPrintf(m, "{ 200 mul 128 add 256 div } bind\n");

    _cmsIOPrintf(m, "]\n");

}

// Due to impedance mismatch between XYZ and almost all RGB and CMYK spaces
// I choose to dump LUTS in Lab instead of XYZ. There is still a lot of wasted
// space on 3D CLUT, but since space seems not to be a problem here, 33 points
// would give a reasonable accuracy. Note also that CRD tables must operate in
// 8 bits.

static
int WriteOutputLUT(cmsIOHANDLER* m, cmsHPROFILE hProfile, cmsUInt32Number Intent, cmsUInt32Number dwFlags)
{
    cmsHPROFILE hLab;
    cmsHTRANSFORM xform;
    cmsUInt32Number i, nChannels;
    cmsUInt32Number OutputFormat;
    _cmsTRANSFORM* v;
    cmsPipeline* DeviceLink;
    cmsHPROFILE Profiles[3];
    cmsCIEXYZ BlackPointAdaptedToD50;
    cmsBool lDoBPC = (cmsBool) (dwFlags & cmsFLAGS_BLACKPOINTCOMPENSATION);
    cmsBool lFixWhite = (cmsBool) !(dwFlags & cmsFLAGS_NOWHITEONWHITEFIXUP);
    cmsUInt32Number InFrm = TYPE_Lab_16;
    cmsUInt32Number RelativeEncodingIntent;
    cmsColorSpaceSignature ColorSpace;

    hLab = cmsCreateLab4ProfileTHR(m ->ContextID, NULL);
    if (hLab == NULL) return 0;

    OutputFormat = cmsFormatterForColorspaceOfProfile(hProfile, 2, FALSE);
    nChannels    = T_CHANNELS(OutputFormat);

    ColorSpace = cmsGetColorSpace(hProfile);

    // For absolute colorimetric, the LUT is encoded as relative in order to preserve precision.

    RelativeEncodingIntent = Intent;
    if (RelativeEncodingIntent == INTENT_ABSOLUTE_COLORIMETRIC)
        RelativeEncodingIntent = INTENT_RELATIVE_COLORIMETRIC;

    // Use V4 Lab always
    Profiles[0] = hLab;
    Profiles[1] = hProfile;

    xform = cmsCreateMultiprofileTransformTHR(m ->ContextID,
                                              Profiles, 2, TYPE_Lab_DBL,
                                              OutputFormat, RelativeEncodingIntent, 0);
    cmsCloseProfile(hLab);

    if (xform == NULL) {

        cmsSignalError(m ->ContextID, cmsERROR_COLORSPACE_CHECK, "Cannot create transform Lab -> Profile in CRD creation");
        return 0;
    }

    // Get a copy of the internal devicelink
    v = (_cmsTRANSFORM*) xform;
    DeviceLink = cmsPipelineDup(v ->Lut);
    if (DeviceLink == NULL) return 0;

    // We need a CLUT
    dwFlags |= cmsFLAGS_FORCE_CLUT;
    _cmsOptimizePipeline(m->ContextID, &DeviceLink, RelativeEncodingIntent, &InFrm, &OutputFormat, &dwFlags);

    _cmsIOPrintf(m, "<<\n");
    _cmsIOPrintf(m, "/ColorRenderingType 1\n");

    cmsDetectBlackPoint(&BlackPointAdaptedToD50, hProfile, Intent, 0);

    // Emit headers, etc.
    EmitWhiteBlackD50(m, &BlackPointAdaptedToD50);
    EmitPQRStage(m, hProfile, lDoBPC, Intent == INTENT_ABSOLUTE_COLORIMETRIC);
    EmitXYZ2Lab(m);

    // FIXUP: map Lab (100, 0, 0) to perfect white, because the particular encoding for Lab
    // does map a=b=0 not falling into any specific node. Since range a,b goes -128..127,
    // zero is slightly moved towards right, so assure next node (in L=100 slice) is mapped to
    // zero. This would sacrifice a bit of highlights, but failure to do so would cause
    // scum dot. Ouch.

    if (Intent == INTENT_ABSOLUTE_COLORIMETRIC)
            lFixWhite = FALSE;

    _cmsIOPrintf(m, "/RenderTable ");

    WriteCLUT(m, cmsPipelineGetPtrToFirstStage(DeviceLink), "<", ">\n", "", "", lFixWhite, ColorSpace);

    _cmsIOPrintf(m, " %d {} bind ", nChannels);

    for (i=1; i < nChannels; i++)
            _cmsIOPrintf(m, "dup ");

    _cmsIOPrintf(m, "]\n");

    EmitIntent(m, Intent);

    _cmsIOPrintf(m, ">>\n");

    if (!(dwFlags & cmsFLAGS_NODEFAULTRESOURCEDEF)) {

        _cmsIOPrintf(m, "/Current exch /ColorRendering defineresource pop\n");
    }

    cmsPipelineFree(DeviceLink);
    cmsDeleteTransform(xform);

    return 1;
}

// Builds a ASCII string containing colorant list in 0..1.0 range
static
void BuildColorantList(char *Colorant, cmsUInt32Number nColorant, cmsUInt16Number Out[])
{
    char Buff[32];
    cmsUInt32Number j;

    Colorant[0] = 0;
    if (nColorant > cmsMAXCHANNELS)
        nColorant = cmsMAXCHANNELS;

    for (j = 0; j < nColorant; j++) {

        snprintf(Buff, 31, "%.3f", Out[j] / 65535.0);
        Buff[31] = 0;
        strcat(Colorant, Buff);
        if (j < nColorant - 1)
            strcat(Colorant, " ");

    }
}

// Creates a PostScript color list from a named profile data.
// This is a HP extension.

static
int WriteNamedColorCRD(cmsIOHANDLER* m, cmsHPROFILE hNamedColor, cmsUInt32Number Intent, cmsUInt32Number dwFlags)
{
    cmsHTRANSFORM xform;
    cmsUInt32Number i, nColors, nColorant;
    cmsUInt32Number OutputFormat;
    char ColorName[cmsMAX_PATH];
    char Colorant[512];
    cmsNAMEDCOLORLIST* NamedColorList;

    OutputFormat = cmsFormatterForColorspaceOfProfile(hNamedColor, 2, FALSE);
    nColorant    = T_CHANNELS(OutputFormat);

    xform = cmsCreateTransform(hNamedColor, TYPE_NAMED_COLOR_INDEX, NULL, OutputFormat, Intent, dwFlags);
    if (xform == NULL) return 0;

    NamedColorList = cmsGetNamedColorList(xform);
    if (NamedColorList == NULL) return 0;

    _cmsIOPrintf(m, "<<\n");
    _cmsIOPrintf(m, "(colorlistcomment) (%s) \n", "Named profile");
    _cmsIOPrintf(m, "(Prefix) [ (Pantone ) (PANTONE ) ]\n");
    _cmsIOPrintf(m, "(Suffix) [ ( CV) ( CVC) ( C) ]\n");

    nColors   = cmsNamedColorCount(NamedColorList);

    for (i=0; i < nColors; i++) {

        cmsUInt16Number In[1];
        cmsUInt16Number Out[cmsMAXCHANNELS];

        In[0] = (cmsUInt16Number) i;

        if (!cmsNamedColorInfo(NamedColorList, i, ColorName, NULL, NULL, NULL, NULL))
                continue;

        cmsDoTransform(xform, In, Out, 1);
        BuildColorantList(Colorant, nColorant, Out);
        _cmsIOPrintf(m, " (%s) [ %s ]\n", ColorName, Colorant);
    }

    _cmsIOPrintf(m, " >>");

    if (!(dwFlags & cmsFLAGS_NODEFAULTRESOURCEDEF)) {

    _cmsIOPrintf(m, " /Current exch /HPSpotTable defineresource pop\n");
    }

    cmsDeleteTransform(xform);
    return 1;
}

// This one does create a Color Rendering Dictionary.
// CRD are always LUT-Based, no matter if profile is
// implemented as matrix-shaper.

static
cmsUInt32Number  GenerateCRD(cmsContext ContextID,
                             cmsHPROFILE hProfile,
                             cmsUInt32Number Intent, cmsUInt32Number dwFlags,
                             cmsIOHANDLER* mem)
{
    cmsUInt32Number dwBytesUsed;

    if (!(dwFlags & cmsFLAGS_NODEFAULTRESOURCEDEF)) {

        EmitHeader(mem, "Color Rendering Dictionary (CRD)", hProfile);
    }

    // Is a named color profile?
    if (cmsGetDeviceClass(hProfile) == cmsSigNamedColorClass) {

        if (!WriteNamedColorCRD(mem, hProfile, Intent, dwFlags)) {
            return 0;
        }
    }
    else {

        // CRD are always implemented as LUT

        if (!WriteOutputLUT(mem, hProfile, Intent, dwFlags)) {
            return 0;
        }
    }

    if (!(dwFlags & cmsFLAGS_NODEFAULTRESOURCEDEF)) {

        _cmsIOPrintf(mem, "%%%%EndResource\n");
        _cmsIOPrintf(mem, "\n%% CRD End\n");
    }

    // Done, keep memory usage
    dwBytesUsed = mem ->UsedSpace;

    // Finally, return used byte count
    return dwBytesUsed;

    cmsUNUSED_PARAMETER(ContextID);
}

cmsUInt32Number CMSEXPORT cmsGetPostScriptColorResource(cmsContext ContextID,
                                                               cmsPSResourceType Type,
                                                               cmsHPROFILE hProfile,
                                                               cmsUInt32Number Intent,
                                                               cmsUInt32Number dwFlags,
                                                               cmsIOHANDLER* io)
{
    cmsUInt32Number  rc;

    switch (Type) {

        case cmsPS_RESOURCE_CSA:
            rc = GenerateCSA(ContextID, hProfile, Intent, dwFlags, io);
            break;

        default:
        case cmsPS_RESOURCE_CRD:
            rc = GenerateCRD(ContextID, hProfile, Intent, dwFlags, io);
            break;
    }

    return rc;
}

cmsUInt32Number CMSEXPORT cmsGetPostScriptCRD(cmsContext ContextID,
                              cmsHPROFILE hProfile,
                              cmsUInt32Number Intent, cmsUInt32Number dwFlags,
                              void* Buffer, cmsUInt32Number dwBufferLen)
{
    cmsIOHANDLER* mem;
    cmsUInt32Number dwBytesUsed;

    // Set up the serialization engine
    if (Buffer == NULL)
        mem = cmsOpenIOhandlerFromNULL(ContextID);
    else
        mem = cmsOpenIOhandlerFromMem(ContextID, Buffer, dwBufferLen, "w");

    if (!mem) return 0;

    dwBytesUsed =  cmsGetPostScriptColorResource(ContextID, cmsPS_RESOURCE_CRD, hProfile, Intent, dwFlags, mem);

    // Get rid of memory stream
    cmsCloseIOhandler(mem);

    return dwBytesUsed;
}

// Does create a Color Space Array on XYZ colorspace for PostScript usage
cmsUInt32Number CMSEXPORT cmsGetPostScriptCSA(cmsContext ContextID,
                                              cmsHPROFILE hProfile,
                                              cmsUInt32Number Intent,
                                              cmsUInt32Number dwFlags,
                                              void* Buffer,
                                              cmsUInt32Number dwBufferLen)
{
    cmsIOHANDLER* mem;
    cmsUInt32Number dwBytesUsed;

    if (Buffer == NULL)
        mem = cmsOpenIOhandlerFromNULL(ContextID);
    else
        mem = cmsOpenIOhandlerFromMem(ContextID, Buffer, dwBufferLen, "w");

    if (!mem) return 0;

    dwBytesUsed =  cmsGetPostScriptColorResource(ContextID, cmsPS_RESOURCE_CSA, hProfile, Intent, dwFlags, mem);

    // Get rid of memory stream
    cmsCloseIOhandler(mem);

    return dwBytesUsed;

}

quality87%

¤ Dauer der Verarbeitung: 0.35 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.