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authorAntonin Descampe <antonin@gmail.com>2011-03-20 22:45:24 +0000
committerAntonin Descampe <antonin@gmail.com>2011-03-20 22:45:24 +0000
commit19f9147e1076d83dd1111609ca93a01085dbfb4f (patch)
tree8ba9fe2ac562b474f627c3ae8c90eefb7d0435a3 /thirdparty/liblcms2/src/cmsps2.c
parent6bda73eeb2134963f64c3d67fdd11c1304cb14f9 (diff)
Removed the libs directory containing win32 compiled versions of libpng, libtiff and liblcms. Added a thirdparty directory to include main source files of libtiff, libpng, libz and liblcms to enable support of these formats in the codec executables. CMake will try to statically build these libraries if they are not found on the system. Note that these third party libraries are not required to build libopenjpeg (which has no dependencies).
Diffstat (limited to 'thirdparty/liblcms2/src/cmsps2.c')
-rw-r--r--thirdparty/liblcms2/src/cmsps2.c1595
1 files changed, 1595 insertions, 0 deletions
diff --git a/thirdparty/liblcms2/src/cmsps2.c b/thirdparty/liblcms2/src/cmsps2.c
new file mode 100644
index 00000000..b41f58ff
--- /dev/null
+++ b/thirdparty/liblcms2/src/cmsps2.c
@@ -0,0 +1,1595 @@
+//---------------------------------------------------------------------------------
+//
+// Little Color Management System
+// Copyright (c) 1998-2008 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 on dependig
+ of 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);
+}
+
+
+// Convert to byte (using ICC2 notation)
+/*
+static
+cmsUInt8Number L2Byte(cmsUInt16Number w)
+{
+ int ww = w + 0x0080;
+
+ if (ww > 0xFFFF) return 0xFF;
+
+ return (cmsUInt8Number) ((cmsUInt16Number) (ww >> 8) & 0xFF);
+}
+*/
+
+// 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, int 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
+//
+
+/*
+static
+void EmitL2Y(cmsIOHANDLER* m)
+{
+ _cmsIOPrintf(m,
+ "{ "
+ "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
+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");
+}
+
+
+
+// Outputs a table of words. It does use 16 bits
+
+static
+void Emit1Gamma(cmsIOHANDLER* m, cmsToneCurve* Table)
+{
+ cmsUInt32Number i;
+ cmsFloat64Number gamma;
+
+
+ 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, "{ %g exp } bind ", gamma);
+ return;
+ }
+
+ _cmsIOPrintf(m, "{ ");
+
+ // Bounds check
+ EmitRangeCheck(m);
+
+ // Emit intepolation code
+
+ // PostScript code Stack
+ // =============== ========================
+ // v
+ _cmsIOPrintf(m, " [");
+
+ for (i=0; i < Table->nEntries; i++) {
+ _cmsIOPrintf(m, "%d ", Table->Table16[i]);
+ }
+
+ _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 ");
+}
+
+
+// Compare gamma table
+
+static
+cmsBool GammaTableEquals(cmsUInt16Number* g1, cmsUInt16Number* g2, int nEntries)
+{
+ return memcmp(g1, g2, nEntries* sizeof(cmsUInt16Number)) == 0;
+}
+
+
+// Does write a set of gamma curves
+
+static
+void EmitNGamma(cmsIOHANDLER* m, int n, cmsToneCurve* g[])
+{
+ int i;
+
+ for( i=0; i < n; i++ )
+ {
+ if (i > 0 && GammaTableEquals(g[i-1]->Table16, g[i]->Table16, g[i]->nEntries)) {
+
+ _cmsIOPrintf(m, "dup ");
+ }
+ else {
+ Emit1Gamma(m, g[i]);
+ }
+ }
+
+}
+
+
+
+
+
+// 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 begining of whole block.
+
+static
+int OutputValueSampler(register const cmsUInt16Number In[], register cmsUInt16Number Out[], register 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");
+
+ _cmsIOPrintf(m, "/DecodeA ");
+
+ Emit1Gamma(m, Curve);
+
+ _cmsIOPrintf(m, " \n");
+
+ _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");
+ _cmsIOPrintf(m, "/DecodeABC [ ");
+
+ EmitNGamma(m, 3, CurveSet);
+
+ _cmsIOPrintf(m, "]\n");
+
+ _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, int Intent, cmsCIEXYZ* BlackPoint)
+{
+ const char* PreMaj;
+ const char* PostMaj;
+ const char* PreMin, *PostMin;
+ cmsStage* mpe;
+
+ 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) {
+
+ _cmsIOPrintf(m, "/DecodeDEF [ ");
+ EmitNGamma(m, cmsStageOutputChannels(mpe), _cmsStageGetPtrToCurveSet(mpe));
+ _cmsIOPrintf(m, "]\n");
+
+ 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, int 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;
+
+ 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);
+ }
+
+ cmsDeleteTransform(xform);
+ 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, int 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(&DeviceLink, Intent, &InputFormat, &OutFrm, &dwFlags);
+
+ rc = EmitCIEBasedDEF(m, DeviceLink, Intent, &BlackPointAdaptedToD50);
+ cmsPipelineFree(DeviceLink);
+ }
+ break;
+
+ default:
+
+ cmsSignalError(m ->ContextID, cmsERROR_COLORSPACE_CHECK, "Only 3, 4 channels 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, int Intent)
+{
+ cmsHTRANSFORM xform;
+ cmsHPROFILE hLab;
+ int i, nColors;
+ char ColorName[32];
+ 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 accurancy. Note also that CRD tables must operate in
+// 8 bits.
+
+static
+int WriteOutputLUT(cmsIOHANDLER* m, cmsHPROFILE hProfile, int Intent, cmsUInt32Number dwFlags)
+{
+ cmsHPROFILE hLab;
+ cmsHTRANSFORM xform;
+ int i, nChannels;
+ cmsUInt32Number OutputFormat;
+ _cmsTRANSFORM* v;
+ cmsPipeline* DeviceLink;
+ cmsHPROFILE Profiles[3];
+ cmsCIEXYZ BlackPointAdaptedToD50;
+ cmsBool lDoBPC = (dwFlags & cmsFLAGS_BLACKPOINTCOMPENSATION);
+ cmsBool lFixWhite = !(dwFlags & cmsFLAGS_NOWHITEONWHITEFIXUP);
+ cmsUInt32Number InFrm = TYPE_Lab_16;
+ int 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(&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, int nColorant, cmsUInt16Number Out[])
+{
+ char Buff[32];
+ int j;
+
+ Colorant[0] = 0;
+ if (nColorant > cmsMAXCHANNELS)
+ nColorant = cmsMAXCHANNELS;
+
+ 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
+int WriteNamedColorCRD(cmsIOHANDLER* m, cmsHPROFILE hNamedColor, int Intent, cmsUInt32Number dwFlags)
+{
+ cmsHTRANSFORM xform;
+ int i, nColors, nColorant;
+ cmsUInt32Number OutputFormat;
+ char ColorName[32];
+ char Colorant[128];
+ 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;
+
+}