cmsps2.c 47.1 KB
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/*
 * 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
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 * published by the Free Software Foundation.  Oracle designates this
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 * particular file as subject to the "Classpath" exception as provided
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 * by Oracle in the LICENSE file that accompanied this code.
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 *
 * 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.
 *
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 * 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.
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 */

// 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:
//
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//---------------------------------------------------------------------------------
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//
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//  Little Color Management System
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//  Copyright (c) 1998-2011 Marti Maria Saguer
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//
// 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.
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//
//---------------------------------------------------------------------------------
//
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#include "lcms2_internal.h"
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// 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)
  ==================================================================================

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  In order to obtain precision, code chooses between three ways to implement
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  the device -> XYZ transform. These cases identifies monochrome profiles (often
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  implemented as a set of curves), matrix-shaper and Pipeline-based.
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  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]
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            /RangeLMN [ 0.0 cmsD50X 0.0 cmsD50Y 0.0 cmsD50Z ]
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            /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 on dependig
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   of profile implementation. Since here there are no interpolation tables, I do
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   the conversion directly to XYZ



    [ /CIEBasedABC
            <<
                /DecodeABC [ {transfer1} {transfer2} {transfer3} ]
                /MatrixABC [Matrix]
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                /RangeLMN [ 0.0 cmsD50X 0.0 cmsD50Y 0.0 cmsD50Z ]
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                /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> ]
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            /RangeLMN [ -0.236 1.254 0 1 -0.635 1.640 ]
               % -128/500 1+127/500 0 1  -127/200 1+128/200
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            /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 {
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    _cmsStageCLutData* Pipeline;
    cmsIOHANDLER* m;
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    int FirstComponent;
    int SecondComponent;
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    const char* PreMaj;
    const char* PostMaj;
    const char* PreMin;
    const char* PostMin;
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    int  FixWhite;    // Force mapping of pure white
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    cmsColorSpaceSignature  ColorSpace;  // ColorSpace of profile
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} cmsPsSamplerCargo;
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static int _cmsPSActualColumn = 0;
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// Convert to byte
static
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cmsUInt8Number Word2Byte(cmsUInt16Number w)
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{
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    return (cmsUInt8Number) floor((cmsFloat64Number) w / 257.0 + 0.5);
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}


// Convert to byte (using ICC2 notation)
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/*
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static
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cmsUInt8Number L2Byte(cmsUInt16Number w)
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{
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    int ww = w + 0x0080;
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    if (ww > 0xFFFF) return 0xFF;
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    return (cmsUInt8Number) ((cmsUInt16Number) (ww >> 8) & 0xFF);
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}
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*/
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// Write a cooked byte

static
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void WriteByte(cmsIOHANDLER* m, cmsUInt8Number b)
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{
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    _cmsIOPrintf(m, "%02x", b);
    _cmsPSActualColumn += 2;
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    if (_cmsPSActualColumn > MAXPSCOLS) {
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        _cmsIOPrintf(m, "\n");
        _cmsPSActualColumn = 0;
    }
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}

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

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    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");
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}


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

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

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

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


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

// Does write the intent

static
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void EmitIntent(cmsIOHANDLER* m, int RenderingIntent)
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{
    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;
    }

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

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

/*
static
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void EmitL2Y(cmsIOHANDLER* m)
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{
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    _cmsIOPrintf(m,
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            "{ "
                "100 mul 16 add 116 div "               // (L * 100 + 16) / 116
                 "dup 6 29 div ge "                     // >= 6 / 29 ?
                 "{ dup dup mul mul } "                 // yes, ^3 and done
                 "{ 4 29 div sub 108 841 div mul } "    // no, slope limiting
            "ifelse } bind ");
}
*/


// Lab -> XYZ, see the discussion above

static
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void EmitLab2XYZ(cmsIOHANDLER* m)
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{
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    _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");
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}



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

static
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void Emit1Gamma(cmsIOHANDLER* m, cmsToneCurve* Table)
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{
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    cmsUInt32Number i;
    cmsFloat64Number gamma;
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    if (Table == NULL) return; // Error
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    if (Table ->nEntries <= 0) return;  // Empty table
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    // Suppress whole if identity
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    if (cmsIsToneCurveLinear(Table)) return;
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    // Check if is really an exponential. If so, emit "exp"
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    gamma = cmsEstimateGamma(Table, 0.001);
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     if (gamma > 0) {
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            _cmsIOPrintf(m, "{ %g exp } bind ", gamma);
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            return;
     }

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    _cmsIOPrintf(m, "{ ");
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    // Bounds check
    EmitRangeCheck(m);

    // Emit intepolation code

    // PostScript code                      Stack
    // ===============                      ========================
                                            // v
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    _cmsIOPrintf(m, " [");
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    for (i=0; i < Table->nEntries; i++) {
        _cmsIOPrintf(m, "%d ", Table->Table16[i]);
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    }

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    _cmsIOPrintf(m, "] ");                        // 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 ");                      // 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 ");                // result

    _cmsIOPrintf(m, " } bind ");
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}


// Compare gamma table

static
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cmsBool GammaTableEquals(cmsUInt16Number* g1, cmsUInt16Number* g2, int nEntries)
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{
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    return memcmp(g1, g2, nEntries* sizeof(cmsUInt16Number)) == 0;
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}


// Does write a set of gamma curves

static
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void EmitNGamma(cmsIOHANDLER* m, int n, cmsToneCurve* g[])
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{
    int i;

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

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        if (i > 0 && GammaTableEquals(g[i-1]->Table16, g[i]->Table16, g[i]->nEntries)) {
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            _cmsIOPrintf(m, "dup ");
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        }
        else {
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            Emit1Gamma(m, g[i]);
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        }
    }

}





// 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
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//          Out[] The Pipeline values, normalized to 0..ffff
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//
//  Returning a value other than 0 does terminate the sampling process
//
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//  Each row contains Pipeline values for all but first component. So, I
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//  detect row changing by keeping a copy of last value of first
//  component. -1 is used to mark begining of whole block.

static
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int OutputValueSampler(register const cmsUInt16Number In[], register cmsUInt16Number Out[], register void* Cargo)
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{
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    cmsPsSamplerCargo* sc = (cmsPsSamplerCargo*) Cargo;
    cmsUInt32Number i;
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    if (sc -> FixWhite) {

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        if (In[0] == 0xFFFF) {  // Only in L* = 100, ab = [-8..8]
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            if ((In[1] >= 0x7800 && In[1] <= 0x8800) &&
                (In[2] >= 0x7800 && In[2] <= 0x8800)) {
D
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626

627 628 629
                cmsUInt16Number* Black;
                cmsUInt16Number* White;
                cmsUInt32Number nOutputs;
D
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630 631 632 633

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

634
                for (i=0; i < nOutputs; i++)
D
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635 636 637 638 639 640 641 642 643 644 645 646 647 648
                        Out[i] = White[i];
            }


        }
    }


    // Hadle the parenthesis on rows

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

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

649
                    _cmsIOPrintf(sc ->m, sc ->PostMin);
D
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650
                    sc ->SecondComponent = -1;
651
                    _cmsIOPrintf(sc ->m, sc ->PostMaj);
D
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652 653 654
            }

            // Begin block
655
            _cmsPSActualColumn = 0;
D
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656

657
            _cmsIOPrintf(sc ->m, sc ->PreMaj);
D
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658 659 660 661 662 663 664 665
            sc ->FirstComponent = In[0];
    }


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

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

666
                    _cmsIOPrintf(sc ->m, sc ->PostMin);
D
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667 668
            }

669
            _cmsIOPrintf(sc ->m, sc ->PreMin);
D
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670 671 672
            sc ->SecondComponent = In[1];
    }

673
      // Dump table.
D
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674

675
      for (i=0; i < sc -> Pipeline ->Params->nOutputs; i++) {
D
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676

677 678
          cmsUInt16Number wWordOut = Out[i];
          cmsUInt8Number wByteOut;           // Value as byte
D
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679

B
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680

681
          // We always deal with Lab4
D
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682

683 684 685
          wByteOut = Word2Byte(wWordOut);
          WriteByte(sc -> m, wByteOut);
      }
D
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686

687
      return 1;
D
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688 689
}

690
// Writes a Pipeline on memstream. Could be 8 or 16 bits based
D
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691 692

static
693 694 695 696 697 698
void WriteCLUT(cmsIOHANDLER* m, cmsStage* mpe, const char* PreMaj,
                                             const char* PostMaj,
                                             const char* PreMin,
                                             const char* PostMin,
                                             int FixWhite,
                                             cmsColorSpaceSignature ColorSpace)
D
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699
{
700 701
    cmsUInt32Number i;
    cmsPsSamplerCargo sc;
D
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702 703 704

    sc.FirstComponent = -1;
    sc.SecondComponent = -1;
705
    sc.Pipeline = (_cmsStageCLutData *) mpe ->Data;
D
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706 707 708 709
    sc.m   = m;
    sc.PreMaj = PreMaj;
    sc.PostMaj= PostMaj;

710 711
    sc.PreMin   = PreMin;
    sc.PostMin  = PostMin;
D
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712 713 714
    sc.FixWhite = FixWhite;
    sc.ColorSpace = ColorSpace;

715
    _cmsIOPrintf(m, "[");
D
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716

717 718
    for (i=0; i < sc.Pipeline->Params->nInputs; i++)
        _cmsIOPrintf(m, " %d ", sc.Pipeline->Params->nSamples[i]);
D
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719

720
    _cmsIOPrintf(m, " [\n");
D
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721

722
    cmsStageSampleCLut16bit(mpe, OutputValueSampler, (void*) &sc, SAMPLER_INSPECT);
D
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723

724 725 726
    _cmsIOPrintf(m, PostMin);
    _cmsIOPrintf(m, PostMaj);
    _cmsIOPrintf(m, "] ");
D
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727 728 729 730 731 732 733

}


// Dumps CIEBasedA Color Space Array

static
734
int EmitCIEBasedA(cmsIOHANDLER* m, cmsToneCurve* Curve, cmsCIEXYZ* BlackPoint)
D
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735 736
{

737 738
    _cmsIOPrintf(m, "[ /CIEBasedA\n");
    _cmsIOPrintf(m, "  <<\n");
D
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739

740
    _cmsIOPrintf(m, "/DecodeA ");
D
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741

742
    Emit1Gamma(m, Curve);
D
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743

744
    _cmsIOPrintf(m, " \n");
D
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745

746 747
    _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");
D
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748

749 750
    EmitWhiteBlackD50(m, BlackPoint);
    EmitIntent(m, INTENT_PERCEPTUAL);
D
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751

752 753
    _cmsIOPrintf(m, ">>\n");
    _cmsIOPrintf(m, "]\n");
D
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754

755
    return 1;
D
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756 757 758 759 760 761
}


// Dumps CIEBasedABC Color Space Array

static
762
int EmitCIEBasedABC(cmsIOHANDLER* m, cmsFloat64Number* Matrix, cmsToneCurve** CurveSet, cmsCIEXYZ* BlackPoint)
D
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763 764 765
{
    int i;

766 767 768
    _cmsIOPrintf(m, "[ /CIEBasedABC\n");
    _cmsIOPrintf(m, "<<\n");
    _cmsIOPrintf(m, "/DecodeABC [ ");
D
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769

770
    EmitNGamma(m, 3, CurveSet);
D
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771

772
    _cmsIOPrintf(m, "]\n");
D
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773

774
    _cmsIOPrintf(m, "/MatrixABC [ " );
D
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775

776
    for( i=0; i < 3; i++ ) {
D
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777

B
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778 779 780
        _cmsIOPrintf(m, "%.6f %.6f %.6f ", Matrix[i + 3*0],
                                           Matrix[i + 3*1],
                                           Matrix[i + 3*2]);
781
    }
D
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782 783


784
    _cmsIOPrintf(m, "]\n");
D
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785

786
    _cmsIOPrintf(m, "/RangeLMN [ 0.0 0.9642 0.0 1.0000 0.0 0.8249 ]\n");
D
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787

788 789
    EmitWhiteBlackD50(m, BlackPoint);
    EmitIntent(m, INTENT_PERCEPTUAL);
D
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790

791 792
    _cmsIOPrintf(m, ">>\n");
    _cmsIOPrintf(m, "]\n");
D
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793 794


795
    return 1;
D
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796 797 798 799
}


static
800
int EmitCIEBasedDEF(cmsIOHANDLER* m, cmsPipeline* Pipeline, int Intent, cmsCIEXYZ* BlackPoint)
D
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801 802 803 804
{
    const char* PreMaj;
    const char* PostMaj;
    const char* PreMin, *PostMin;
805
    cmsStage* mpe;
D
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806

807 808 809 810
    mpe = Pipeline ->Elements;


    switch (cmsStageInputChannels(mpe)) {
D
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811 812
    case 3:

813
            _cmsIOPrintf(m, "[ /CIEBasedDEF\n");
D
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814 815 816 817 818
            PreMaj ="<";
            PostMaj= ">\n";
            PreMin = PostMin = "";
            break;
    case 4:
819
            _cmsIOPrintf(m, "[ /CIEBasedDEFG\n");
D
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820 821 822 823 824 825 826 827 828 829
            PreMaj = "[";
            PostMaj = "]\n";
            PreMin = "<";
            PostMin = ">\n";
            break;
    default:
            return 0;

    }

830
    _cmsIOPrintf(m, "<<\n");
D
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831

832
    if (cmsStageType(mpe) == cmsSigCurveSetElemType) {
D
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833

834 835 836 837 838
        _cmsIOPrintf(m, "/DecodeDEF [ ");
        EmitNGamma(m, cmsStageOutputChannels(mpe), _cmsStageGetPtrToCurveSet(mpe));
        _cmsIOPrintf(m, "]\n");

        mpe = mpe ->Next;
D
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839 840 841 842
    }



843
    if (cmsStageType(mpe) == cmsSigCLutElemType) {
D
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844

845 846 847
            _cmsIOPrintf(m, "/Table ");
            WriteCLUT(m, mpe, PreMaj, PostMaj, PreMin, PostMin, FALSE, (cmsColorSpaceSignature) 0);
            _cmsIOPrintf(m, "]\n");
D
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848 849 850 851 852 853
    }

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

854 855
    _cmsIOPrintf(m, "   >>\n");
    _cmsIOPrintf(m, "]\n");
D
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856 857 858 859 860 861 862 863


    return 1;
}

// Generates a curve from a gray profile

static
B
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864
    cmsToneCurve* ExtractGray2Y(cmsContext ContextID, cmsHPROFILE hProfile, int Intent)
D
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865
{
866 867 868
    cmsToneCurve* Out = cmsBuildTabulatedToneCurve16(ContextID, 256, NULL);
    cmsHPROFILE hXYZ  = cmsCreateXYZProfile();
    cmsHTRANSFORM xform = cmsCreateTransformTHR(ContextID, hProfile, TYPE_GRAY_8, hXYZ, TYPE_XYZ_DBL, Intent, cmsFLAGS_NOOPTIMIZE);
D
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869 870
    int i;

B
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871 872
    if (Out != NULL) {
        for (i=0; i < 256; i++) {
D
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873

B
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874 875
            cmsUInt8Number Gray = (cmsUInt8Number) i;
            cmsCIEXYZ XYZ;
D
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876

B
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877
            cmsDoTransform(xform, &Gray, &XYZ, 1);
D
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878

B
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879 880
            Out ->Table16[i] =_cmsQuickSaturateWord(XYZ.Y * 65535.0);
        }
D
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881 882 883 884 885 886 887 888 889
    }

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



890
// Because PostScript has only 8 bits in /Table, we should use
D
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891 892 893
// a more perceptually uniform space... I do choose Lab.

static
894
int WriteInputLUT(cmsIOHANDLER* m, cmsHPROFILE hProfile, int Intent, cmsUInt32Number dwFlags)
D
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895 896 897
{
    cmsHPROFILE hLab;
    cmsHTRANSFORM xform;
898 899
    cmsUInt32Number nChannels;
    cmsUInt32Number InputFormat;
D
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900 901 902 903 904 905 906
    int rc;
    cmsHPROFILE Profiles[2];
    cmsCIEXYZ BlackPointAdaptedToD50;

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

907 908
    InputFormat = cmsFormatterForColorspaceOfProfile(hProfile, 2, FALSE);
    nChannels   = T_CHANNELS(InputFormat);
D
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909 910


911
    cmsDetectBlackPoint(&BlackPointAdaptedToD50, hProfile, Intent, 0);
D
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912

913 914
    // Adjust output to Lab4
    hLab = cmsCreateLab4ProfileTHR(m ->ContextID, NULL);
D
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915

916 917
    Profiles[0] = hProfile;
    Profiles[1] = hLab;
D
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918

919 920
    xform = cmsCreateMultiprofileTransform(Profiles, 2,  InputFormat, TYPE_Lab_DBL, Intent, 0);
    cmsCloseProfile(hLab);
D
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921 922 923

    if (xform == NULL) {

924 925
        cmsSignalError(m ->ContextID, cmsERROR_COLORSPACE_CHECK, "Cannot create transform Profile -> Lab");
        return 0;
D
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926 927 928 929 930 931 932
    }

    // Only 1, 3 and 4 channels are allowed

    switch (nChannels) {

    case 1: {
B
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933
            cmsToneCurve* Gray2Y = ExtractGray2Y(m ->ContextID, hProfile, Intent);
934 935
            EmitCIEBasedA(m, Gray2Y, &BlackPointAdaptedToD50);
            cmsFreeToneCurve(Gray2Y);
D
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936 937 938 939 940
            }
            break;

    case 3:
    case 4: {
B
bae 已提交
941
            cmsUInt32Number OutFrm = TYPE_Lab_16;
942 943 944 945 946 947 948 949 950 951 952
            cmsPipeline* DeviceLink;
            _cmsTRANSFORM* v = (_cmsTRANSFORM*) xform;

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

            dwFlags |= cmsFLAGS_FORCE_CLUT;
            _cmsOptimizePipeline(&DeviceLink, Intent, &InputFormat, &OutFrm, &dwFlags);

            rc = EmitCIEBasedDEF(m, DeviceLink, Intent, &BlackPointAdaptedToD50);
            cmsPipelineFree(DeviceLink);
D
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953 954 955 956 957
            }
            break;

    default:

958 959
        cmsSignalError(m ->ContextID, cmsERROR_COLORSPACE_CHECK, "Only 3, 4 channels supported for CSA. This profile has %d channels.", nChannels);
        return 0;
D
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960 961 962 963
    }


    cmsDeleteTransform(xform);
964

D
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965 966 967
    return 1;
}

968 969 970 971 972 973 974
static
cmsFloat64Number* GetPtrToMatrix(const cmsStage* mpe)
{
    _cmsStageMatrixData* Data = (_cmsStageMatrixData*) mpe ->Data;

    return Data -> Double;
}
D
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975 976 977 978 979


// Does create CSA based on matrix-shaper. Allowed types are gray and RGB based

static
980
int WriteInputMatrixShaper(cmsIOHANDLER* m, cmsHPROFILE hProfile, cmsStage* Matrix, cmsStage* Shaper)
D
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981
{
982
    cmsColorSpaceSignature ColorSpace;
D
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983 984 985 986 987
    int rc;
    cmsCIEXYZ BlackPointAdaptedToD50;

    ColorSpace = cmsGetColorSpace(hProfile);

988
    cmsDetectBlackPoint(&BlackPointAdaptedToD50, hProfile, INTENT_RELATIVE_COLORIMETRIC, 0);
D
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989

990
    if (ColorSpace == cmsSigGrayData) {
D
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991

992
        cmsToneCurve** ShaperCurve = _cmsStageGetPtrToCurveSet(Shaper);
B
bae 已提交
993
        rc = EmitCIEBasedA(m, ShaperCurve[0], &BlackPointAdaptedToD50);
D
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994 995 996

    }
    else
997
        if (ColorSpace == cmsSigRgbData) {
D
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998

B
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999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009
            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),
1010
                                 &BlackPointAdaptedToD50);
D
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1011 1012 1013
        }
        else  {

1014
            cmsSignalError(m ->ContextID, cmsERROR_COLORSPACE_CHECK, "Profile is not suitable for CSA. Unsupported colorspace.");
D
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1015 1016 1017
            return 0;
        }

B
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1018
        return rc;
D
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1019 1020 1021 1022 1023 1024 1025 1026
}



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

static
1027
int WriteNamedColorCSA(cmsIOHANDLER* m, cmsHPROFILE hNamedColor, int Intent)
D
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1028 1029 1030 1031 1032
{
    cmsHTRANSFORM xform;
    cmsHPROFILE   hLab;
    int i, nColors;
    char ColorName[32];
1033
    cmsNAMEDCOLORLIST* NamedColorList;
D
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1034

1035 1036
    hLab  = cmsCreateLab4ProfileTHR(m ->ContextID, NULL);
    xform = cmsCreateTransform(hNamedColor, TYPE_NAMED_COLOR_INDEX, hLab, TYPE_Lab_DBL, Intent, 0);
D
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1037 1038
    if (xform == NULL) return 0;

1039 1040
    NamedColorList = cmsGetNamedColorList(xform);
    if (NamedColorList == NULL) return 0;
D
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1041

1042 1043 1044 1045
    _cmsIOPrintf(m, "<<\n");
    _cmsIOPrintf(m, "(colorlistcomment) (%s)\n", "Named color CSA");
    _cmsIOPrintf(m, "(Prefix) [ (Pantone ) (PANTONE ) ]\n");
    _cmsIOPrintf(m, "(Suffix) [ ( CV) ( CVC) ( C) ]\n");
D
duke 已提交
1046

1047
    nColors   = cmsNamedColorCount(NamedColorList);
D
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1048 1049 1050 1051


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

1052
        cmsUInt16Number In[1];
D
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1053 1054
        cmsCIELab Lab;

1055
        In[0] = (cmsUInt16Number) i;
D
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1056

1057
        if (!cmsNamedColorInfo(NamedColorList, i, ColorName, NULL, NULL, NULL, NULL))
D
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1058 1059 1060
                continue;

        cmsDoTransform(xform, In, &Lab, 1);
1061
        _cmsIOPrintf(m, "  (%s) [ %.3f %.3f %.3f ]\n", ColorName, Lab.L, Lab.a, Lab.b);
D
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1062 1063 1064 1065
    }



1066
    _cmsIOPrintf(m, ">>\n");
D
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1067 1068 1069 1070 1071 1072 1073 1074

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


// Does create a Color Space Array on XYZ colorspace for PostScript usage
1075 1076 1077 1078 1079 1080
static
cmsUInt32Number GenerateCSA(cmsContext ContextID,
                            cmsHPROFILE hProfile,
                            cmsUInt32Number Intent,
                            cmsUInt32Number dwFlags,
                            cmsIOHANDLER* mem)
D
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1081
{
1082 1083 1084
    cmsUInt32Number dwBytesUsed;
    cmsPipeline* lut = NULL;
    cmsStage* Matrix, *Shaper;
D
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1085 1086 1087


    // Is a named color profile?
1088
    if (cmsGetDeviceClass(hProfile) == cmsSigNamedColorClass) {
D
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1089

1090
        if (!WriteNamedColorCSA(mem, hProfile, Intent)) goto Error;
D
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1091 1092 1093 1094
    }
    else {


1095 1096 1097
        // Any profile class are allowed (including devicelink), but
        // output (PCS) colorspace must be XYZ or Lab
        cmsColorSpaceSignature ColorSpace = cmsGetPCS(hProfile);
D
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1098

1099 1100
        if (ColorSpace != cmsSigXYZData &&
            ColorSpace != cmsSigLabData) {
D
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1101

B
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1102 1103
                cmsSignalError(ContextID, cmsERROR_COLORSPACE_CHECK, "Invalid output color space");
                goto Error;
1104
        }
D
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1105 1106


1107 1108 1109
        // Read the lut with all necessary conversion stages
        lut = _cmsReadInputLUT(hProfile, Intent);
        if (lut == NULL) goto Error;
D
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1110 1111


1112 1113
        // Tone curves + matrix can be implemented without any LUT
        if (cmsPipelineCheckAndRetreiveStages(lut, 2, cmsSigCurveSetElemType, cmsSigMatrixElemType, &Shaper, &Matrix)) {
D
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1114

1115
            if (!WriteInputMatrixShaper(mem, hProfile, Matrix, Shaper)) goto Error;
D
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1116 1117

        }
1118
        else {
B
bae 已提交
1119 1120
           // We need a LUT for the rest
           if (!WriteInputLUT(mem, hProfile, Intent, dwFlags)) goto Error;
1121
        }
D
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1122 1123 1124 1125
    }


    // Done, keep memory usage
1126
    dwBytesUsed = mem ->UsedSpace;
D
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1127

1128 1129
    // Get rid of LUT
    if (lut != NULL) cmsPipelineFree(lut);
D
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1130 1131 1132

    // Finally, return used byte count
    return dwBytesUsed;
1133 1134 1135 1136

Error:
    if (lut != NULL) cmsPipelineFree(lut);
    return 0;
D
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1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205
}

// ------------------------------------------------------ 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
1206
void EmitPQRStage(cmsIOHANDLER* m, cmsHPROFILE hProfile, int DoBPC, int lIsAbsolute)
D
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1207 1208 1209
{


1210
        if (lIsAbsolute) {
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1211

1212
            // For absolute colorimetric intent, encode back to relative
1213
            // and generate a relative Pipeline
D
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1214

1215
            // Relative encoding is obtained across XYZpcs*(D50/WhitePoint)
D
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1216

1217 1218
            cmsCIEXYZ White;

1219
            _cmsReadMediaWhitePoint(&White, hProfile);
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1220

1221 1222
            _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");
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1223

1224
            _cmsIOPrintf(m, "%% Absolute colorimetric -- encode to relative to maximize LUT usage\n"
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1225
                      "/TransformPQR [\n"
1226 1227 1228
                      "{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",
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                      White.X, White.Y, White.Z);
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            return;
        }


1234
        _cmsIOPrintf(m,"%% Bradford Cone Space\n"
1235 1236
                 "/MatrixPQR [0.8951 -0.7502 0.0389 0.2664 1.7135 -0.0685 -0.1614 0.0367 1.0296 ] \n");

1237
        _cmsIOPrintf(m, "/RangePQR [ -0.5 2 -0.5 2 -0.5 2 ]\n");
1238 1239


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        // No BPC

        if (!DoBPC) {

1244
            _cmsIOPrintf(m, "%% VonKries-like transform in Bradford Cone Space\n"
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                      "/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

1253
            _cmsIOPrintf(m, "%% VonKries-like transform in Bradford Cone Space plus BPC\n"
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1254 1255
                      "/TransformPQR [\n");

1256
            _cmsIOPrintf(m, "{4 index 3 get div 2 index 3 get mul "
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                    "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");

1262
            _cmsIOPrintf(m, "{4 index 4 get div 2 index 4 get mul "
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                    "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");

1268
            _cmsIOPrintf(m, "{4 index 5 get div 2 index 5 get mul "
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                    "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
1281
void EmitXYZ2Lab(cmsIOHANDLER* m)
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{
1283 1284 1285 1286 1287 1288 1289 1290
    _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");
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1291 1292


1293 1294 1295
    _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");
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1296 1297


1298
    _cmsIOPrintf(m, "]\n");
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}

// 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 accurancy. Note also that CRD tables must operate in
// 8 bits.

static
1310
int WriteOutputLUT(cmsIOHANDLER* m, cmsHPROFILE hProfile, int Intent, cmsUInt32Number dwFlags)
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{
    cmsHPROFILE hLab;
    cmsHTRANSFORM xform;
    int i, nChannels;
1315 1316 1317
    cmsUInt32Number OutputFormat;
    _cmsTRANSFORM* v;
    cmsPipeline* DeviceLink;
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1318 1319
    cmsHPROFILE Profiles[3];
    cmsCIEXYZ BlackPointAdaptedToD50;
1320 1321 1322
    cmsBool lDoBPC = (dwFlags & cmsFLAGS_BLACKPOINTCOMPENSATION);
    cmsBool lFixWhite = !(dwFlags & cmsFLAGS_NOWHITEONWHITEFIXUP);
    cmsUInt32Number InFrm = TYPE_Lab_16;
1323
    int RelativeEncodingIntent;
1324
    cmsColorSpaceSignature ColorSpace;
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1325 1326


1327 1328
    hLab = cmsCreateLab4ProfileTHR(m ->ContextID, NULL);
    if (hLab == NULL) return 0;
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1329

1330 1331
    OutputFormat = cmsFormatterForColorspaceOfProfile(hProfile, 2, FALSE);
    nChannels    = T_CHANNELS(OutputFormat);
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1332

1333
    ColorSpace = cmsGetColorSpace(hProfile);
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1334

1335
    // For absolute colorimetric, the LUT is encoded as relative in order to preserve precision.
1336 1337 1338 1339 1340 1341

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


1342 1343 1344
    // Use V4 Lab always
    Profiles[0] = hLab;
    Profiles[1] = hProfile;
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1345

1346 1347 1348 1349
    xform = cmsCreateMultiprofileTransformTHR(m ->ContextID,
                                              Profiles, 2, TYPE_Lab_DBL,
                                              OutputFormat, RelativeEncodingIntent, 0);
    cmsCloseProfile(hLab);
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1350 1351 1352

    if (xform == NULL) {

1353 1354
        cmsSignalError(m ->ContextID, cmsERROR_COLORSPACE_CHECK, "Cannot create transform Lab -> Profile in CRD creation");
        return 0;
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1355 1356
    }

1357 1358 1359 1360
    // Get a copy of the internal devicelink
    v = (_cmsTRANSFORM*) xform;
    DeviceLink = cmsPipelineDup(v ->Lut);
    if (DeviceLink == NULL) return 0;
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1361 1362


1363 1364 1365
    // We need a CLUT
    dwFlags |= cmsFLAGS_FORCE_CLUT;
    _cmsOptimizePipeline(&DeviceLink, RelativeEncodingIntent, &InFrm, &OutputFormat, &dwFlags);
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1366

1367 1368
    _cmsIOPrintf(m, "<<\n");
    _cmsIOPrintf(m, "/ColorRenderingType 1\n");
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1369 1370


1371
    cmsDetectBlackPoint(&BlackPointAdaptedToD50, hProfile, Intent, 0);
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1372 1373 1374

    // Emit headers, etc.
    EmitWhiteBlackD50(m, &BlackPointAdaptedToD50);
1375
    EmitPQRStage(m, hProfile, lDoBPC, Intent == INTENT_ABSOLUTE_COLORIMETRIC);
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1376 1377 1378 1379 1380 1381 1382 1383 1384
    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.

1385 1386 1387
    if (Intent == INTENT_ABSOLUTE_COLORIMETRIC)
            lFixWhite = FALSE;

1388
    _cmsIOPrintf(m, "/RenderTable ");
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1389 1390


1391 1392 1393
    WriteCLUT(m, cmsPipelineGetPtrToFirstStage(DeviceLink), "<", ">\n", "", "", lFixWhite, ColorSpace);

    _cmsIOPrintf(m, " %d {} bind ", nChannels);
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1394 1395

    for (i=1; i < nChannels; i++)
1396
            _cmsIOPrintf(m, "dup ");
D
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1397

1398
    _cmsIOPrintf(m, "]\n");
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1399 1400 1401 1402


    EmitIntent(m, Intent);

1403
    _cmsIOPrintf(m, ">>\n");
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1404 1405 1406

    if (!(dwFlags & cmsFLAGS_NODEFAULTRESOURCEDEF)) {

1407
        _cmsIOPrintf(m, "/Current exch /ColorRendering defineresource pop\n");
D
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1408 1409
    }

1410
    cmsPipelineFree(DeviceLink);
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1411 1412 1413 1414 1415 1416 1417 1418
    cmsDeleteTransform(xform);

    return 1;
}


// Builds a ASCII string containing colorant list in 0..1.0 range
static
1419
void BuildColorantList(char *Colorant, int nColorant, cmsUInt16Number Out[])
D
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1420 1421 1422 1423 1424
{
    char Buff[32];
    int j;

    Colorant[0] = 0;
1425 1426
    if (nColorant > cmsMAXCHANNELS)
        nColorant = cmsMAXCHANNELS;
1427

D
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1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442
    for (j=0; j < nColorant; j++) {

                sprintf(Buff, "%.3f", Out[j] / 65535.0);
                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
1443
int WriteNamedColorCRD(cmsIOHANDLER* m, cmsHPROFILE hNamedColor, int Intent, cmsUInt32Number dwFlags)
D
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1444 1445 1446
{
    cmsHTRANSFORM xform;
    int i, nColors, nColorant;
1447
    cmsUInt32Number OutputFormat;
D
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1448 1449
    char ColorName[32];
    char Colorant[128];
1450
    cmsNAMEDCOLORLIST* NamedColorList;
D
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1451 1452


1453 1454 1455 1456 1457
    OutputFormat = cmsFormatterForColorspaceOfProfile(hNamedColor, 2, FALSE);
    nColorant    = T_CHANNELS(OutputFormat);


    xform = cmsCreateTransform(hNamedColor, TYPE_NAMED_COLOR_INDEX, NULL, OutputFormat, Intent, dwFlags);
D
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1458 1459 1460
    if (xform == NULL) return 0;


1461 1462
    NamedColorList = cmsGetNamedColorList(xform);
    if (NamedColorList == NULL) return 0;
D
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1463

1464 1465 1466 1467
    _cmsIOPrintf(m, "<<\n");
    _cmsIOPrintf(m, "(colorlistcomment) (%s) \n", "Named profile");
    _cmsIOPrintf(m, "(Prefix) [ (Pantone ) (PANTONE ) ]\n");
    _cmsIOPrintf(m, "(Suffix) [ ( CV) ( CVC) ( C) ]\n");
D
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1468

1469
    nColors   = cmsNamedColorCount(NamedColorList);
D
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1470 1471 1472

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

1473 1474
        cmsUInt16Number In[1];
        cmsUInt16Number Out[cmsMAXCHANNELS];
D
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1475

1476
        In[0] = (cmsUInt16Number) i;
D
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1477

1478
        if (!cmsNamedColorInfo(NamedColorList, i, ColorName, NULL, NULL, NULL, NULL))
D
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1479 1480 1481 1482
                continue;

        cmsDoTransform(xform, In, Out, 1);
        BuildColorantList(Colorant, nColorant, Out);
1483
        _cmsIOPrintf(m, "  (%s) [ %s ]\n", ColorName, Colorant);
D
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1484 1485
    }

1486
    _cmsIOPrintf(m, "   >>");
D
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1487 1488 1489

    if (!(dwFlags & cmsFLAGS_NODEFAULTRESOURCEDEF)) {

1490
    _cmsIOPrintf(m, " /Current exch /HPSpotTable defineresource pop\n");
D
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1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502
    }

    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.

1503 1504 1505 1506 1507
static
cmsUInt32Number  GenerateCRD(cmsContext ContextID,
                             cmsHPROFILE hProfile,
                             cmsUInt32Number Intent, cmsUInt32Number dwFlags,
                             cmsIOHANDLER* mem)
D
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1508
{
1509
    cmsUInt32Number dwBytesUsed;
D
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1510 1511 1512

    if (!(dwFlags & cmsFLAGS_NODEFAULTRESOURCEDEF)) {

1513
        EmitHeader(mem, "Color Rendering Dictionary (CRD)", hProfile);
D
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1514 1515 1516 1517
    }


    // Is a named color profile?
1518
    if (cmsGetDeviceClass(hProfile) == cmsSigNamedColorClass) {
D
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1519 1520

        if (!WriteNamedColorCRD(mem, hProfile, Intent, dwFlags)) {
1521
            return 0;
D
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1522 1523 1524 1525
        }
    }
    else {

1526
        // CRD are always implemented as LUT
D
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1527

1528 1529 1530
        if (!WriteOutputLUT(mem, hProfile, Intent, dwFlags)) {
            return 0;
        }
D
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1531 1532 1533 1534
    }

    if (!(dwFlags & cmsFLAGS_NODEFAULTRESOURCEDEF)) {

1535 1536
        _cmsIOPrintf(mem, "%%%%EndResource\n");
        _cmsIOPrintf(mem, "\n%% CRD End\n");
D
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1537 1538 1539
    }

    // Done, keep memory usage
1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551
    dwBytesUsed = mem ->UsedSpace;

    // Finally, return used byte count
    return dwBytesUsed;

    cmsUNUSED_PARAMETER(ContextID);
}




cmsUInt32Number CMSEXPORT cmsGetPostScriptColorResource(cmsContext ContextID,
B
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1552 1553 1554 1555 1556
                                                               cmsPSResourceType Type,
                                                               cmsHPROFILE hProfile,
                                                               cmsUInt32Number Intent,
                                                               cmsUInt32Number dwFlags,
                                                               cmsIOHANDLER* io)
1557 1558 1559 1560 1561 1562
{
    cmsUInt32Number  rc;


    switch (Type) {

B
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1563 1564 1565 1566 1567 1568 1569 1570
        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;
1571 1572 1573 1574 1575 1576 1577 1578
    }

    return rc;
}



cmsUInt32Number CMSEXPORT cmsGetPostScriptCRD(cmsContext ContextID,
B
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1579
                              cmsHPROFILE hProfile,
1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594
                              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);
D
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1595 1596

    // Get rid of memory stream
1597
    cmsCloseIOhandler(mem);
D
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1598 1599 1600 1601 1602 1603

    return dwBytesUsed;
}



1604 1605 1606 1607 1608 1609 1610
// 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)
D
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1611
{
1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628
    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;

D
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1629
}