lcms2: Import upstream release 2.16.

libs/lcms2/AUTHORS

@@ -42,6 +42,7 @@ Philipp Knechtges
 Amyspark
 Lovell Fuller
 Eli Schwartz
+Diogo Teles Sant'Anna
 
 Special Thanks 
 --------------

libs/lcms2/include/lcms2.h

@@ -23,7 +23,7 @@
 //
 //---------------------------------------------------------------------------------
 //
-// Version 2.15
+// Version 2.16
 //
 
 #ifndef _lcms2_H
@@ -76,12 +76,15 @@
 
 #ifndef CMS_USE_CPP_API
 #   ifdef __cplusplus
+#       if __cplusplus >= 201703L
+#            define CMS_NO_REGISTER_KEYWORD 1
+#       endif
 extern "C" {
 #   endif
 #endif
 
 // Version/release
-#define LCMS_VERSION        2150
+#define LCMS_VERSION        2160
 
 // I will give the chance of redefining basic types for compilers that are not fully C99 compliant
 #ifndef CMS_BASIC_TYPES_ALREADY_DEFINED
@@ -325,7 +328,8 @@ typedef enum {
     cmsSigUInt8ArrayType                    = 0x75693038,  // 'ui08'
     cmsSigVcgtType                          = 0x76636774,  // 'vcgt'
     cmsSigViewingConditionsType             = 0x76696577,  // 'view'
-    cmsSigXYZType                           = 0x58595A20   // 'XYZ '
+    cmsSigXYZType                           = 0x58595A20,  // 'XYZ '
+    cmsSigMHC2Type                          = 0x4D484332   // 'MHC2'
 
 
 } cmsTagTypeSignature;
@@ -403,7 +407,8 @@ typedef enum {
     cmsSigVcgtTag                           = 0x76636774,  // 'vcgt'
     cmsSigMetaTag                           = 0x6D657461,  // 'meta'
     cmsSigcicpTag                           = 0x63696370,  // 'cicp'
-    cmsSigArgyllArtsTag                     = 0x61727473   // 'arts'
+    cmsSigArgyllArtsTag                     = 0x61727473,  // 'arts'
+    cmsSigMHC2Tag                           = 0x4D484332   // 'MHC2'
 
 } cmsTagSignature;
 
@@ -948,6 +953,7 @@ typedef void* cmsHTRANSFORM;
 #define TYPE_RGB_DBL          (FLOAT_SH(1)|COLORSPACE_SH(PT_RGB)|CHANNELS_SH(3)|BYTES_SH(0))
 #define TYPE_BGR_DBL          (FLOAT_SH(1)|COLORSPACE_SH(PT_RGB)|CHANNELS_SH(3)|BYTES_SH(0)|DOSWAP_SH(1))
 #define TYPE_CMYK_DBL         (FLOAT_SH(1)|COLORSPACE_SH(PT_CMYK)|CHANNELS_SH(4)|BYTES_SH(0))
+#define TYPE_OKLAB_DBL        (FLOAT_SH(1)|COLORSPACE_SH(PT_MCH3)|CHANNELS_SH(3)|BYTES_SH(0))
 
 // IEEE 754-2008 "half"
 #define TYPE_GRAY_HALF_FLT    (FLOAT_SH(1)|COLORSPACE_SH(PT_GRAY)|CHANNELS_SH(1)|BYTES_SH(2))
@@ -1048,6 +1054,19 @@ typedef struct {
 
 } cmsVideoSignalType;
 
+typedef struct {
+    cmsUInt32Number   CurveEntries;
+    cmsFloat64Number* RedCurve;
+    cmsFloat64Number* GreenCurve;
+    cmsFloat64Number* BlueCurve;
+
+    cmsFloat64Number  MinLuminance;         // ST.2086 min luminance in nits
+    cmsFloat64Number  PeakLuminance;        // ST.2086 peak luminance in nits
+
+    cmsFloat64Number XYZ2XYZmatrix[3][4];
+
+} cmsMHC2Type;
+
 
 
 // Get LittleCMS version (for shared objects) -----------------------------------------------------------------------------
@@ -1220,7 +1239,8 @@ CMSAPI cmsBool           CMSEXPORT cmsIsToneCurveMonotonic(const cmsToneCurve* t
 CMSAPI cmsBool           CMSEXPORT cmsIsToneCurveDescending(const cmsToneCurve* t);
 CMSAPI cmsInt32Number    CMSEXPORT cmsGetToneCurveParametricType(const cmsToneCurve* t);
 CMSAPI cmsFloat64Number  CMSEXPORT cmsEstimateGamma(const cmsToneCurve* t, cmsFloat64Number Precision);
-CMSAPI cmsFloat64Number* CMSEXPORT cmsGetToneCurveParams(const cmsToneCurve* t);
+
+CMSAPI const cmsCurveSegment* CMSEXPORT cmsGetToneCurveSegment(cmsInt32Number n, const cmsToneCurve* t);
 
 // Tone curve tabular estimation
 CMSAPI cmsUInt32Number         CMSEXPORT cmsGetToneCurveEstimatedTableEntries(const cmsToneCurve* t);
@@ -1314,8 +1334,11 @@ CMSAPI cmsBool           CMSEXPORT cmsSliceSpaceFloat(cmsUInt32Number nInputs, c
 
 typedef struct _cms_MLU_struct cmsMLU;
 
-#define  cmsNoLanguage "\0\0"
-#define  cmsNoCountry  "\0\0"
+#define  cmsNoLanguage    "\0\0"
+#define  cmsNoCountry     "\0\0"
+
+// Special language/country to retrieve unicode field for description in V2 profiles. Use with care.
+#define  cmsV2Unicode     "\xff\xff"
 
 CMSAPI cmsMLU*           CMSEXPORT cmsMLUalloc(cmsContext ContextID, cmsUInt32Number nItems);
 CMSAPI void              CMSEXPORT cmsMLUfree(cmsMLU* mlu);
@@ -1327,6 +1350,9 @@ CMSAPI cmsBool           CMSEXPORT cmsMLUsetASCII(cmsMLU* mlu,
 CMSAPI cmsBool           CMSEXPORT cmsMLUsetWide(cmsMLU* mlu,
                                                   const char LanguageCode[3], const char CountryCode[3],
                                                   const wchar_t* WideString);
+CMSAPI cmsBool           CMSEXPORT cmsMLUsetUTF8(cmsMLU* mlu,
+                                                  const char LanguageCode[3], const char CountryCode[3],
+                                                  const char* UTF8String);
 
 CMSAPI cmsUInt32Number   CMSEXPORT cmsMLUgetASCII(const cmsMLU* mlu,
                                                   const char LanguageCode[3], const char CountryCode[3],
@@ -1335,6 +1361,10 @@ CMSAPI cmsUInt32Number   CMSEXPORT cmsMLUgetASCII(const cmsMLU* mlu,
 CMSAPI cmsUInt32Number   CMSEXPORT cmsMLUgetWide(const cmsMLU* mlu,
                                                  const char LanguageCode[3], const char CountryCode[3],
                                                  wchar_t* Buffer, cmsUInt32Number BufferSize);
+CMSAPI cmsUInt32Number   CMSEXPORT cmsMLUgetUTF8(const cmsMLU* mlu,
+                                                 const char LanguageCode[3], const char CountryCode[3],
+                                                 char* Buffer, cmsUInt32Number BufferSize);
+
 
 CMSAPI cmsBool           CMSEXPORT cmsMLUgetTranslation(const cmsMLU* mlu,
                                                          const char LanguageCode[3], const char CountryCode[3],
@@ -1559,6 +1589,10 @@ CMSAPI cmsUInt32Number   CMSEXPORT cmsGetProfileInfoASCII(cmsHPROFILE hProfile,
                                                             const char LanguageCode[3], const char CountryCode[3],
                                                             char* Buffer, cmsUInt32Number BufferSize);
 
+CMSAPI cmsUInt32Number  CMSEXPORT cmsGetProfileInfoUTF8(cmsHPROFILE hProfile, cmsInfoType Info,
+                                                            const char LanguageCode[3], const char CountryCode[3],
+                                                            char* Buffer, cmsUInt32Number BufferSize);
+
 // IO handlers ----------------------------------------------------------------------------------------------------------
 
 typedef struct _cms_io_handler cmsIOHANDLER;
@@ -1621,6 +1655,9 @@ CMSAPI cmsHPROFILE      CMSEXPORT cmsCreateInkLimitingDeviceLinkTHR(cmsContext C
 
 CMSAPI cmsHPROFILE      CMSEXPORT cmsCreateInkLimitingDeviceLink(cmsColorSpaceSignature ColorSpace, cmsFloat64Number Limit);
 
+CMSAPI cmsHPROFILE      CMSEXPORT cmsCreateDeviceLinkFromCubeFile(const char* cFileName);
+
+CMSAPI cmsHPROFILE      CMSEXPORT cmsCreateDeviceLinkFromCubeFileTHR(cmsContext ContextID, const char* cFileName);
 
 CMSAPI cmsHPROFILE      CMSEXPORT cmsCreateLab2ProfileTHR(cmsContext ContextID, const cmsCIExyY* WhitePoint);
 CMSAPI cmsHPROFILE      CMSEXPORT cmsCreateLab2Profile(const cmsCIExyY* WhitePoint);
@@ -1633,6 +1670,8 @@ CMSAPI cmsHPROFILE      CMSEXPORT cmsCreateXYZProfile(void);
 CMSAPI cmsHPROFILE      CMSEXPORT cmsCreate_sRGBProfileTHR(cmsContext ContextID);
 CMSAPI cmsHPROFILE      CMSEXPORT cmsCreate_sRGBProfile(void);
 
+CMSAPI cmsHPROFILE      CMSEXPORT cmsCreate_OkLabProfile(cmsContext ctx);
+
 CMSAPI cmsHPROFILE      CMSEXPORT cmsCreateBCHSWabstractProfileTHR(cmsContext ContextID,
                                                              cmsUInt32Number nLUTPoints,
                                                              cmsFloat64Number Bright,

libs/lcms2/include/lcms2_plugin.h

@@ -603,9 +603,9 @@ typedef void     (* _cmsTransformFn)(struct _cmstransform_struct *CMMcargo,   //
 typedef void     (*_cmsTransform2Fn)(struct _cmstransform_struct *CMMcargo,
                                      const void* InputBuffer,
                                      void* OutputBuffer,
-                                     cmsUInt32Number PixelsPerLine,     
-                                     cmsUInt32Number LineCount,          
-                                     const cmsStride* Stride);  
+                                     cmsUInt32Number PixelsPerLine,
+                                     cmsUInt32Number LineCount,
+                                     const cmsStride* Stride);
 
 typedef cmsBool  (* _cmsTransformFactory)(_cmsTransformFn* xform,
                                          void** UserData,
@@ -648,7 +648,7 @@ typedef struct {
 }  cmsPluginTransform;
 
 //----------------------------------------------------------------------------------------------------------
-// Mutex 
+// Mutex
 
 typedef void*    (* _cmsCreateMutexFnPtrType)(cmsContext ContextID);
 typedef void     (* _cmsDestroyMutexFnPtrType)(cmsContext ContextID, void* mtx);

libs/lcms2/src/cmsalpha.c

@@ -402,7 +402,7 @@ static cmsFormatterAlphaFn FormattersAlpha[6][6] = {
 
 // This function computes the distance from each component to the next one in bytes. 
 static
-void ComputeIncrementsForChunky(cmsUInt32Number Format,                                 
+cmsBool ComputeIncrementsForChunky(cmsUInt32Number Format,
                                 cmsUInt32Number ComponentStartingOrder[], 
                                 cmsUInt32Number ComponentPointerIncrements[])
 {
@@ -416,7 +416,7 @@ void ComputeIncrementsForChunky(cmsUInt32Number Format,
        
        // Sanity check
        if (total_chans <= 0 || total_chans >= cmsMAXCHANNELS)
-           return;
+           return FALSE;
 
         memset(channels, 0, sizeof(channels));
 
@@ -453,13 +453,15 @@ void ComputeIncrementsForChunky(cmsUInt32Number Format,
 
        for (i = 0; i < extra; i++)
               ComponentStartingOrder[i] = channels[i + nchannels];
+
+       return TRUE;
 }
 
 
 
 //  On planar configurations, the distance is the stride added to any non-negative
 static
-void ComputeIncrementsForPlanar(cmsUInt32Number Format, 
+cmsBool ComputeIncrementsForPlanar(cmsUInt32Number Format,
                                 cmsUInt32Number BytesPerPlane,
                                 cmsUInt32Number ComponentStartingOrder[], 
                                 cmsUInt32Number ComponentPointerIncrements[])
@@ -473,7 +475,7 @@ void ComputeIncrementsForPlanar(cmsUInt32Number Format,
       
        // Sanity check
        if (total_chans <= 0 || total_chans >= cmsMAXCHANNELS)
-           return;
+           return FALSE;
 
        memset(channels, 0, sizeof(channels));
 
@@ -509,29 +511,29 @@ void ComputeIncrementsForPlanar(cmsUInt32Number Format,
 
        for (i = 0; i < extra; i++)
               ComponentStartingOrder[i] = channels[i + nchannels];
+
+       return TRUE;
 }
 
 
 
 // Dispatcher por chunky and planar RGB
 static
-void  ComputeComponentIncrements(cmsUInt32Number Format,
+cmsBool ComputeComponentIncrements(cmsUInt32Number Format,
                                  cmsUInt32Number BytesPerPlane,
                                  cmsUInt32Number ComponentStartingOrder[], 
                                  cmsUInt32Number ComponentPointerIncrements[])
 {
        if (T_PLANAR(Format)) {
 
-              ComputeIncrementsForPlanar(Format,  BytesPerPlane, ComponentStartingOrder, ComponentPointerIncrements);
+              return ComputeIncrementsForPlanar(Format,  BytesPerPlane, ComponentStartingOrder, ComponentPointerIncrements);
        }
        else {
-              ComputeIncrementsForChunky(Format,  ComponentStartingOrder, ComponentPointerIncrements);
+              return ComputeIncrementsForChunky(Format,  ComponentStartingOrder, ComponentPointerIncrements);
        }
 
 }
 
-
-
 // Handles extra channels copying alpha if requested by the flags
 void _cmsHandleExtraChannels(_cmsTRANSFORM* p, const void* in,
                                                void* out,
@@ -565,9 +567,11 @@ void _cmsHandleExtraChannels(_cmsTRANSFORM* p, const void* in,
     if (nExtra == 0)
         return;
 
-    // Compute the increments 
-    ComputeComponentIncrements(p->InputFormat, Stride->BytesPerPlaneIn, SourceStartingOrder, SourceIncrements);
-    ComputeComponentIncrements(p->OutputFormat, Stride->BytesPerPlaneOut, DestStartingOrder, DestIncrements);
+    // Compute the increments
+    if (!ComputeComponentIncrements(p->InputFormat, Stride->BytesPerPlaneIn, SourceStartingOrder, SourceIncrements))
+        return;
+    if (!ComputeComponentIncrements(p->OutputFormat, Stride->BytesPerPlaneOut, DestStartingOrder, DestIncrements))
+        return;
 
     // Check for conversions 8, 16, half, float, dbl
     copyValueFn = _cmsGetFormatterAlpha(p->ContextID, p->InputFormat, p->OutputFormat);
@@ -642,5 +646,3 @@ void _cmsHandleExtraChannels(_cmsTRANSFORM* p, const void* in,
         }
     }
 }
-
-

libs/lcms2/src/cmscnvrt.c

@@ -715,6 +715,16 @@ int BlackPreservingGrayOnlySampler(CMSREGISTER const cmsUInt16Number In[], CMSRE
     return TRUE;
 }
 
+
+// Check whatever the profile is a CMYK->CMYK devicelink
+static
+cmsBool is_cmyk_devicelink(cmsHPROFILE hProfile)
+{
+    return cmsGetDeviceClass(hProfile) == cmsSigLinkClass &&
+            cmsGetColorSpace(hProfile) == cmsSigCmykData &&
+            cmsGetColorSpace(hProfile) == cmsSigCmykData;
+}
+
 // This is the entry for black-preserving K-only intents, which are non-ICC
 static
 cmsPipeline*  BlackPreservingKOnlyIntents(cmsContext     ContextID,
@@ -747,14 +757,16 @@ cmsPipeline*  BlackPreservingKOnlyIntents(cmsContext     ContextID,
     lastProfilePos = nProfiles - 1;
     hLastProfile = hProfiles[lastProfilePos];
 
-    while (lastProfilePos > 1)
+    // Skip CMYK->CMYK devicelinks on ending
+    while (is_cmyk_devicelink(hLastProfile))
     {
-        hLastProfile = hProfiles[--lastProfilePos];
-        if (cmsGetColorSpace(hLastProfile) != cmsSigCmykData ||
-            cmsGetDeviceClass(hLastProfile) != cmsSigLinkClass)
+        if (lastProfilePos < 2)
             break;
+
+        hLastProfile = hProfiles[--lastProfilePos];
     }
 
+
     preservationProfilesCount = lastProfilePos + 1;
 
     // Check for non-cmyk profiles
@@ -771,7 +783,7 @@ cmsPipeline*  BlackPreservingKOnlyIntents(cmsContext     ContextID,
 
     // Create a LUT holding normal ICC transform
     bp.cmyk2cmyk = DefaultICCintents(ContextID,
-                                     preservationProfilesCount,
+        preservationProfilesCount,
         ICCIntents,
         hProfiles,
         BPC,
@@ -783,7 +795,7 @@ cmsPipeline*  BlackPreservingKOnlyIntents(cmsContext     ContextID,
     // Now, compute the tone curve
     bp.KTone = _cmsBuildKToneCurve(ContextID,
         4096,
-                                    preservationProfilesCount,
+        preservationProfilesCount,
         ICCIntents,
         hProfiles,
         BPC,
@@ -973,13 +985,14 @@ cmsPipeline* BlackPreservingKPlaneIntents(cmsContext     ContextID,
     lastProfilePos = nProfiles - 1;
     hLastProfile = hProfiles[lastProfilePos];
 
-    while (lastProfilePos > 1)
-    {   
+    // Skip CMYK->CMYK devicelinks on ending
+    while (is_cmyk_devicelink(hLastProfile))
+    {
+        if (lastProfilePos < 2)
+            break;
+
         hLastProfile = hProfiles[--lastProfilePos];
-        if (cmsGetColorSpace(hLastProfile) != cmsSigCmykData ||
-            cmsGetDeviceClass(hLastProfile) != cmsSigLinkClass)
-            break;        
-    } 
+    }
 
     preservationProfilesCount = lastProfilePos + 1;
 
@@ -1148,8 +1161,7 @@ cmsUInt32Number CMSEXPORT cmsGetSupportedIntentsTHR(cmsContext ContextID, cmsUIn
     cmsIntentsList* pt;
     cmsUInt32Number nIntents;
 
-
-    for (nIntents=0, pt = ctx->Intents; pt != NULL; pt = pt -> Next)
+    for (nIntents=0, pt = DefaultIntents; pt != NULL; pt = pt -> Next)
     {
         if (nIntents < nMax) {
             if (Codes != NULL)
@@ -1162,7 +1174,7 @@ cmsUInt32Number CMSEXPORT cmsGetSupportedIntentsTHR(cmsContext ContextID, cmsUIn
         nIntents++;
     }
 
-    for (nIntents=0, pt = DefaultIntents; pt != NULL; pt = pt -> Next)
+    for (pt = ctx->Intents; pt != NULL; pt = pt -> Next)
     {
         if (nIntents < nMax) {
             if (Codes != NULL)
@@ -1174,6 +1186,7 @@ cmsUInt32Number CMSEXPORT cmsGetSupportedIntentsTHR(cmsContext ContextID, cmsUIn
 
         nIntents++;
     }
+
     return nIntents;
 }
 
@@ -1211,4 +1224,3 @@ cmsBool  _cmsRegisterRenderingIntentPlugin(cmsContext id, cmsPluginBase* Data)
 
     return TRUE;
 }
-

libs/lcms2/src/cmserr.c

@@ -72,7 +72,7 @@ long int CMSEXPORT cmsfilelength(FILE* f)
 //
 // This is the interface to low-level memory management routines. By default a simple
 // wrapping to malloc/free/realloc is provided, although there is a limit on the max
-// amount of memoy that can be reclaimed. This is mostly as a safety feature to prevent 
+// amount of memory that can be reclaimed. This is mostly as a safety feature to prevent
 // bogus or evil code to allocate huge blocks that otherwise lcms would never need.
 
 #define MAX_MEMORY_FOR_ALLOC  ((cmsUInt32Number)(1024U*1024U*512U))
@@ -92,7 +92,8 @@ cmsBool   _cmsRegisterMemHandlerPlugin(cmsContext ContextID, cmsPluginBase* Plug
 static
 void* _cmsMallocDefaultFn(cmsContext ContextID, cmsUInt32Number size)
 {
-    if (size > MAX_MEMORY_FOR_ALLOC) return NULL;  // Never allow over maximum
+    // Never allow 0 or over maximum
+    if (size == 0 || size > MAX_MEMORY_FOR_ALLOC) return NULL;
 
     return (void*) malloc(size);
 
@@ -234,7 +235,7 @@ cmsBool  _cmsRegisterMemHandlerPlugin(cmsContext ContextID, cmsPluginBase *Data)
 
     // NULL forces to reset to defaults. In this special case, the defaults are stored in the context structure. 
     // Remaining plug-ins does NOT have any copy in the context structure, but this is somehow special as the
-    // context internal data should be malloce'd by using those functions. 
+    // context internal data should be malloc'ed by using those functions.
     if (Data == NULL) {
 
        struct _cmsContext_struct* ctx = ( struct _cmsContext_struct*) ContextID;

libs/lcms2/src/cmsgamma.c

@@ -300,6 +300,10 @@ cmsToneCurve* AllocateToneCurveStruct(cmsContext ContextID, cmsUInt32Number nEnt
         return p;
 
 Error:
+    for (i=0; i < nSegments; i++) {
+        if (p ->Segments && p ->Segments[i].SampledPoints) _cmsFree(ContextID, p ->Segments[i].SampledPoints);
+        if (p ->SegInterp && p ->SegInterp[i]) _cmsFree(ContextID, p ->SegInterp[i]);
+    }
     if (p -> SegInterp) _cmsFree(ContextID, p -> SegInterp);
     if (p -> Segments) _cmsFree(ContextID, p -> Segments);
     if (p -> Evals) _cmsFree(ContextID, p -> Evals);
@@ -593,10 +597,16 @@ cmsFloat64Number DefaultEvalParametricFn(cmsInt32Number Type, const cmsFloat64Nu
     case 6:
         e = Params[1]*R + Params[2];
 
-        if (e < 0)
-            Val = Params[3];
-        else
-            Val = pow(e, Params[0]) + Params[3];
+        // On gamma 1.0, don't clamp
+        if (Params[0] == 1.0) {
+            Val = e + Params[3];
+        }
+        else {
+            if (e < 0)
+                Val = Params[3];
+            else
+                Val = pow(e, Params[0]) + Params[3];
+        }
         break;
 
     // ((Y - c) ^1/Gamma - b) / a
@@ -1491,13 +1501,12 @@ cmsFloat64Number CMSEXPORT cmsEstimateGamma(const cmsToneCurve* t, cmsFloat64Num
     return (sum / n);   // The mean
 }
 
+// Retrieve segments on tone curves
 
-// Retrieve parameters on one-segment tone curves
-
-cmsFloat64Number* CMSEXPORT cmsGetToneCurveParams(const cmsToneCurve* t)
+const cmsCurveSegment* CMSEXPORT cmsGetToneCurveSegment(cmsInt32Number n, const cmsToneCurve* t)
 {
     _cmsAssert(t != NULL);
 
-    if (t->nSegments != 1) return NULL;
-    return t->Segments[0].Params;
+    if (n < 0 || n >= (cmsInt32Number) t->nSegments) return NULL;
+    return t->Segments + n;
 }

libs/lcms2/src/cmsgmt.c

@@ -219,7 +219,7 @@ int GamutSampler(CMSREGISTER const cmsUInt16Number In[], CMSREGISTER cmsUInt16Nu
     cmsUInt16Number Proof[cmsMAXCHANNELS], Proof2[cmsMAXCHANNELS];
     cmsFloat64Number dE1, dE2, ErrorRatio;
 
-    // Assume in-gamut by default.
+    // Assume in-gamut by default. NEVER READ, USED FOR DEBUG PURPOSES.
     ErrorRatio = 1.0;
 
     // Convert input to Lab
@@ -596,7 +596,7 @@ cmsBool CMSEXPORT cmsDesaturateLab(cmsCIELab* Lab,
 // Actually, doing that "well" is quite hard, since every component may behave completely different.
 // Since the true point of this function is to detect suitable optimizations, I am imposing some requirements 
 // that simplifies things: only RGB, and only profiles that can got in both directions.
-// The algorithm obtains Y from a syntetical gray R=G=B. Then least squares fitting is used to estimate gamma. 
+// The algorithm obtains Y from a synthetical gray R=G=B. Then least squares fitting is used to estimate gamma.
 // For gamma close to 1.0, RGB is linear. On profiles not supported, -1 is returned.
 
 cmsFloat64Number CMSEXPORT cmsDetectRGBProfileGamma(cmsHPROFILE hProfile, cmsFloat64Number threshold)
@@ -656,4 +656,3 @@ cmsFloat64Number CMSEXPORT cmsDetectRGBProfileGamma(cmsHPROFILE hProfile, cmsFlo
 
     return gamma;
 }
-

libs/lcms2/src/cmsio0.c

@@ -530,7 +530,21 @@ cmsHPROFILE CMSEXPORT cmsCreateProfilePlaceholder(cmsContext ContextID)
 
     // Set default version
     Icc ->Version =  0x02100000;
-    
+
+    // Set default CMM (that's me!)
+    Icc ->CMM = lcmsSignature;
+
+    // Set default creator
+    // Created by LittleCMS (that's me!)
+    Icc ->creator = lcmsSignature;
+
+    // Set default platform
+#ifdef CMS_IS_WINDOWS_
+    Icc ->platform = cmsSigMicrosoft;
+#else
+    Icc ->platform = cmsSigMacintosh;
+#endif
+
     // Set default device class
     Icc->DeviceClass = cmsSigDisplayClass;
 
@@ -784,16 +798,18 @@ cmsBool _cmsReadHeader(_cmsICCPROFILE* Icc)
     }
 
     // Adjust endianness of the used parameters
+    Icc -> CMM             = _cmsAdjustEndianess32(Header.cmmId);
     Icc -> DeviceClass     = (cmsProfileClassSignature) _cmsAdjustEndianess32(Header.deviceClass);
     Icc -> ColorSpace      = (cmsColorSpaceSignature)   _cmsAdjustEndianess32(Header.colorSpace);
     Icc -> PCS             = (cmsColorSpaceSignature)   _cmsAdjustEndianess32(Header.pcs);
    
     Icc -> RenderingIntent = _cmsAdjustEndianess32(Header.renderingIntent);
+    Icc -> platform        = (cmsPlatformSignature)_cmsAdjustEndianess32(Header.platform);
     Icc -> flags           = _cmsAdjustEndianess32(Header.flags);
     Icc -> manufacturer    = _cmsAdjustEndianess32(Header.manufacturer);
     Icc -> model           = _cmsAdjustEndianess32(Header.model);
     Icc -> creator         = _cmsAdjustEndianess32(Header.creator);
-    
+
     _cmsAdjustEndianess64(&Icc -> attributes, &Header.attributes);
     Icc -> Version         = _cmsAdjustEndianess32(_validatedVersion(Header.version));
 
@@ -893,7 +909,7 @@ cmsBool _cmsWriteHeader(_cmsICCPROFILE* Icc, cmsUInt32Number UsedSpace)
     cmsUInt32Number Count;
 
     Header.size        = _cmsAdjustEndianess32(UsedSpace);
-    Header.cmmId       = _cmsAdjustEndianess32(lcmsSignature);
+    Header.cmmId       = _cmsAdjustEndianess32(Icc ->CMM);
     Header.version     = _cmsAdjustEndianess32(Icc ->Version);
 
     Header.deviceClass = (cmsProfileClassSignature) _cmsAdjustEndianess32(Icc -> DeviceClass);
@@ -905,11 +921,7 @@ cmsBool _cmsWriteHeader(_cmsICCPROFILE* Icc, cmsUInt32Number UsedSpace)
 
     Header.magic       = _cmsAdjustEndianess32(cmsMagicNumber);
 
-#ifdef CMS_IS_WINDOWS_
-    Header.platform    = (cmsPlatformSignature) _cmsAdjustEndianess32(cmsSigMicrosoft);
-#else
-    Header.platform    = (cmsPlatformSignature) _cmsAdjustEndianess32(cmsSigMacintosh);
-#endif
+    Header.platform    = (cmsPlatformSignature) _cmsAdjustEndianess32(Icc -> platform);
 
     Header.flags        = _cmsAdjustEndianess32(Icc -> flags);
     Header.manufacturer = _cmsAdjustEndianess32(Icc -> manufacturer);
@@ -925,8 +937,7 @@ cmsBool _cmsWriteHeader(_cmsICCPROFILE* Icc, cmsUInt32Number UsedSpace)
     Header.illuminant.Y = (cmsS15Fixed16Number) _cmsAdjustEndianess32((cmsUInt32Number) _cmsDoubleTo15Fixed16(cmsD50_XYZ()->Y));
     Header.illuminant.Z = (cmsS15Fixed16Number) _cmsAdjustEndianess32((cmsUInt32Number) _cmsDoubleTo15Fixed16(cmsD50_XYZ()->Z));
 
-    // Created by LittleCMS (that's me!)
-    Header.creator      = _cmsAdjustEndianess32(lcmsSignature);
+    Header.creator      = _cmsAdjustEndianess32(Icc ->creator);
 
     memset(&Header.reserved, 0, sizeof(Header.reserved));
 

libs/lcms2/src/cmsio1.c

@@ -578,7 +578,7 @@ Error:
     return NULL;
 }
 
-// Create an output MPE LUT from agiven profile. Version mismatches are handled here
+// Create an output MPE LUT from a given profile. Version mismatches are handled here
 cmsPipeline* CMSEXPORT _cmsReadOutputLUT(cmsHPROFILE hProfile, cmsUInt32Number Intent)
 {
     cmsTagTypeSignature OriginalType;
@@ -1027,3 +1027,13 @@ cmsUInt32Number  CMSEXPORT cmsGetProfileInfoASCII(cmsHPROFILE hProfile, cmsInfoT
 
     return cmsMLUgetASCII(mlu, LanguageCode, CountryCode, Buffer, BufferSize);
 }
+
+cmsUInt32Number  CMSEXPORT cmsGetProfileInfoUTF8(cmsHPROFILE hProfile, cmsInfoType Info,
+                                                          const char LanguageCode[3], const char CountryCode[3],
+                                                          char* Buffer, cmsUInt32Number BufferSize)
+{
+    const cmsMLU* mlu = GetInfo(hProfile, Info);
+    if (mlu == NULL) return 0;
+
+    return cmsMLUgetUTF8(mlu, LanguageCode, CountryCode, Buffer, BufferSize);
+}

libs/lcms2/src/cmslut.c

@@ -475,6 +475,9 @@ cmsUInt32Number CubeSize(const cmsUInt32Number Dims[], cmsUInt32Number b)
         if (rv > UINT_MAX / dim) return 0;
     }
 
+    // Again, prevent overflow
+    if (rv > UINT_MAX / 15) return 0;
+
     return rv;
 }
 
@@ -814,7 +817,13 @@ cmsBool CMSEXPORT cmsStageSampleCLutFloat(cmsStage* mpe, cmsSAMPLERFLOAT Sampler
     cmsUInt32Number nInputs, nOutputs;
     cmsUInt32Number* nSamples;
     cmsFloat32Number In[MAX_INPUT_DIMENSIONS+1], Out[MAX_STAGE_CHANNELS];
-    _cmsStageCLutData* clut = (_cmsStageCLutData*) mpe->Data;
+    _cmsStageCLutData* clut;
+
+    if (mpe == NULL) return FALSE;
+
+    clut = (_cmsStageCLutData*)mpe->Data;
+
+    if (clut == NULL) return FALSE;
 
     nSamples = clut->Params ->nSamples;
     nInputs  = clut->Params ->nInputs;
@@ -1838,5 +1847,3 @@ cmsBool CMSEXPORT cmsPipelineEvalReverseFloat(cmsFloat32Number Target[],
 
     return TRUE;
 }
-
-

libs/lcms2/src/cmsopt.c

@@ -183,6 +183,7 @@ cmsBool  isFloatMatrixIdentity(const cmsMAT3* a)
 
        return TRUE;
 }
+
 // if two adjacent matrices are found, multiply them. 
 static
 cmsBool _MultiplyMatrix(cmsPipeline* Lut)
@@ -1113,14 +1114,17 @@ cmsBool OptimizeByComputingLinearization(cmsPipeline** Lut, cmsUInt32Number Inte
 
         // Store result in curve
         for (t=0; t < OriginalLut ->InputChannels; t++)
-            Trans[t] ->Table16[i] = _cmsQuickSaturateWord(Out[t] * 65535.0);
+        {
+            if (Trans[t]->Table16 != NULL)
+                Trans[t] ->Table16[i] = _cmsQuickSaturateWord(Out[t] * 65535.0);
+        }
     }
 
     // Slope-limit the obtained curves
     for (t = 0; t < OriginalLut ->InputChannels; t++)
         SlopeLimiting(Trans[t]);
 
-    // Check for validity
+    // Check for validity. lIsLinear is here for debug purposes
     lIsSuitable = TRUE;
     lIsLinear   = TRUE;
     for (t=0; (lIsSuitable && (t < OriginalLut ->InputChannels)); t++) {
@@ -1724,6 +1728,8 @@ cmsBool OptimizeMatrixShaper(cmsPipeline** Lut, cmsUInt32Number Intent, cmsUInt3
 
                      _cmsStageMatrixData* Data = (_cmsStageMatrixData*)cmsStageData(Matrix1);
 
+                     if (Matrix1->InputChannels != 3 || Matrix1->OutputChannels != 3) return FALSE;
+
                      // Copy the matrix to our result
                      memcpy(&res, Data->Double, sizeof(res));
 
@@ -1768,7 +1774,7 @@ cmsBool OptimizeMatrixShaper(cmsPipeline** Lut, cmsUInt32Number Intent, cmsUInt3
         _cmsStageToneCurvesData* mpeC2 = (_cmsStageToneCurvesData*) cmsStageData(Curve2);
 
         // In this particular optimization, cache does not help as it takes more time to deal with
-        // the cache that with the pixel handling
+        // the cache than with the pixel handling
         *dwFlags |= cmsFLAGS_NOCACHE;
 
         // Setup the optimizarion routines
@@ -1925,7 +1931,7 @@ cmsBool CMSEXPORT _cmsOptimizePipeline(cmsContext ContextID,
     for (mpe = cmsPipelineGetPtrToFirstStage(*PtrLut);
         mpe != NULL;
         mpe = cmsStageNext(mpe)) {
-        if (cmsStageType(mpe) == cmsSigNamedColorElemType) return FALSE;
+            if (cmsStageType(mpe) == cmsSigNamedColorElemType) return FALSE;
     }
 
     // Try to get rid of identities and trivial conversions.
@@ -1967,6 +1973,3 @@ cmsBool CMSEXPORT _cmsOptimizePipeline(cmsContext ContextID,
     // Only simple optimizations succeeded
     return AnySuccess;
 }
-
-
-

libs/lcms2/src/cmspack.c

@@ -2952,6 +2952,108 @@ cmsUInt8Number* PackFloatFrom16(CMSREGISTER _cmsTRANSFORM* info,
 // --------------------------------------------------------------------------------------------------------
 
 static
+cmsUInt8Number* PackBytesFromFloat(_cmsTRANSFORM* info,
+                                    cmsFloat32Number wOut[],
+                                    cmsUInt8Number* output,
+                                    cmsUInt32Number Stride)
+{
+    cmsUInt32Number nChan = T_CHANNELS(info->OutputFormat);
+    cmsUInt32Number DoSwap = T_DOSWAP(info->OutputFormat);
+    cmsUInt32Number Reverse = T_FLAVOR(info->OutputFormat);
+    cmsUInt32Number Extra = T_EXTRA(info->OutputFormat);
+    cmsUInt32Number SwapFirst = T_SWAPFIRST(info->OutputFormat);
+    cmsUInt32Number Planar = T_PLANAR(info->OutputFormat);
+    cmsUInt32Number ExtraFirst = DoSwap ^ SwapFirst;
+    cmsUInt8Number* swap1 = (cmsUInt8Number*)output;
+    cmsFloat64Number v = 0;
+    cmsUInt8Number vv = 0;
+    cmsUInt32Number i, start = 0;
+
+    if (ExtraFirst)
+        start = Extra;
+
+    for (i = 0; i < nChan; i++) {
+
+        cmsUInt32Number index = DoSwap ? (nChan - i - 1) : i;
+
+        v = wOut[index] * 65535.0;
+
+        if (Reverse)
+            v = 65535.0 - v;
+
+        vv =  FROM_16_TO_8(_cmsQuickSaturateWord(v));
+
+        if (Planar)
+            ((cmsUInt8Number*)output)[(i + start) * Stride] = vv;
+        else
+            ((cmsUInt8Number*)output)[i + start] = vv;
+    }
+
+
+    if (Extra == 0 && SwapFirst) {
+
+        memmove(swap1 + 1, swap1, (nChan - 1) * sizeof(cmsUInt8Number));
+        *swap1 = vv;
+    }
+
+    if (T_PLANAR(info->OutputFormat))
+        return output + sizeof(cmsUInt8Number);
+    else
+        return output + (nChan + Extra) * sizeof(cmsUInt8Number);
+}
+
+static
+cmsUInt8Number* PackWordsFromFloat(_cmsTRANSFORM* info,
+                                    cmsFloat32Number wOut[],
+                                    cmsUInt8Number* output,
+                                    cmsUInt32Number Stride)
+{
+    cmsUInt32Number nChan = T_CHANNELS(info->OutputFormat);
+    cmsUInt32Number DoSwap = T_DOSWAP(info->OutputFormat);
+    cmsUInt32Number Reverse = T_FLAVOR(info->OutputFormat);
+    cmsUInt32Number Extra = T_EXTRA(info->OutputFormat);
+    cmsUInt32Number SwapFirst = T_SWAPFIRST(info->OutputFormat);
+    cmsUInt32Number Planar = T_PLANAR(info->OutputFormat);
+    cmsUInt32Number ExtraFirst = DoSwap ^ SwapFirst;
+    cmsUInt16Number* swap1 = (cmsUInt16Number*)output;
+    cmsFloat64Number v = 0;
+    cmsUInt16Number vv = 0;
+    cmsUInt32Number i, start = 0;
+
+    if (ExtraFirst)
+        start = Extra;
+
+    for (i = 0; i < nChan; i++) {
+
+        cmsUInt32Number index = DoSwap ? (nChan - i - 1) : i;
+
+        v = wOut[index] * 65535.0;
+
+        if (Reverse)
+            v = 65535.0 - v;
+
+        vv = _cmsQuickSaturateWord(v);
+
+        if (Planar)
+            ((cmsUInt16Number*)output)[(i + start) * Stride] = vv;
+        else
+            ((cmsUInt16Number*)output)[i + start] = vv;
+    }
+
+    if (Extra == 0 && SwapFirst) {
+
+        memmove(swap1 + 1, swap1, (nChan - 1) * sizeof(cmsUInt16Number));
+        *swap1 = vv;
+    }
+
+    if (T_PLANAR(info->OutputFormat))
+        return output + sizeof(cmsUInt16Number);
+    else
+        return output + (nChan + Extra) * sizeof(cmsUInt16Number);
+}
+
+
+static
 cmsUInt8Number* PackFloatsFromFloat(_cmsTRANSFORM* info,
                                     cmsFloat32Number wOut[],
                                     cmsUInt8Number* output,
@@ -3114,6 +3216,77 @@ cmsUInt8Number* PackLabDoubleFromFloat(_cmsTRANSFORM* Info,
 }
 
 
+static
+cmsUInt8Number* PackEncodedBytesLabV2FromFloat(_cmsTRANSFORM* Info,
+                                           cmsFloat32Number wOut[],
+                                           cmsUInt8Number* output,
+                                           cmsUInt32Number Stride)
+{
+    cmsCIELab Lab;
+    cmsUInt16Number wlab[3];
+
+    Lab.L = (cmsFloat64Number)(wOut[0] * 100.0);
+    Lab.a = (cmsFloat64Number)(wOut[1] * 255.0 - 128.0);
+    Lab.b = (cmsFloat64Number)(wOut[2] * 255.0 - 128.0);
+
+    cmsFloat2LabEncoded(wlab, &Lab);
+
+    if (T_PLANAR(Info -> OutputFormat)) {
+
+        Stride /= PixelSize(Info->OutputFormat);
+
+        output[0]        = wlab[0] >> 8;
+        output[Stride]   = wlab[1] >> 8;
+        output[Stride*2] = wlab[2] >> 8;
+
+        return output + 1;
+    }
+    else {
+
+        output[0] = wlab[0] >> 8;
+        output[1] = wlab[1] >> 8;
+        output[2] = wlab[2] >> 8;
+
+        return output + (3 + T_EXTRA(Info ->OutputFormat));
+    }
+}
+
+static
+cmsUInt8Number* PackEncodedWordsLabV2FromFloat(_cmsTRANSFORM* Info,
+                                           cmsFloat32Number wOut[],
+                                           cmsUInt8Number* output,
+                                           cmsUInt32Number Stride)
+{
+    cmsCIELab Lab;
+    cmsUInt16Number wlab[3];
+
+    Lab.L = (cmsFloat64Number)(wOut[0] * 100.0);
+    Lab.a = (cmsFloat64Number)(wOut[1] * 255.0 - 128.0);
+    Lab.b = (cmsFloat64Number)(wOut[2] * 255.0 - 128.0);
+
+    cmsFloat2LabEncodedV2(wlab, &Lab);
+
+    if (T_PLANAR(Info -> OutputFormat)) {
+
+        Stride /= PixelSize(Info->OutputFormat);
+
+        ((cmsUInt16Number*) output)[0]        = wlab[0];
+        ((cmsUInt16Number*) output)[Stride]   = wlab[1];
+        ((cmsUInt16Number*) output)[Stride*2] = wlab[2];
+
+        return output + sizeof(cmsUInt16Number);
+    }
+    else {
+
+         ((cmsUInt16Number*) output)[0] = wlab[0];
+         ((cmsUInt16Number*) output)[1] = wlab[1];
+         ((cmsUInt16Number*) output)[2] = wlab[2];
+
+        return output + (3 + T_EXTRA(Info ->OutputFormat)) * sizeof(cmsUInt16Number);
+    }
+}
+
+
 // From 0..1 range to 0..MAX_ENCODEABLE_XYZ
 static
 cmsUInt8Number* PackXYZFloatFromFloat(_cmsTRANSFORM* Info,
@@ -3647,10 +3820,20 @@ static const cmsFormattersFloat OutputFormattersFloat[] = {
     {     TYPE_Lab_DBL,                                                ANYPLANAR|ANYEXTRA,   PackLabDoubleFromFloat},
     {     TYPE_XYZ_DBL,                                                ANYPLANAR|ANYEXTRA,   PackXYZDoubleFromFloat},
 
+    {     TYPE_LabV2_8,                                                ANYPLANAR|ANYEXTRA,   PackEncodedBytesLabV2FromFloat},
+    {     TYPE_LabV2_16,                                               ANYPLANAR|ANYEXTRA,   PackEncodedWordsLabV2FromFloat},
+
     {     FLOAT_SH(1)|BYTES_SH(4), ANYPLANAR|
                              ANYFLAVOR|ANYSWAPFIRST|ANYSWAP|ANYEXTRA|ANYCHANNELS|ANYSPACE,   PackFloatsFromFloat },
     {     FLOAT_SH(1)|BYTES_SH(0), ANYPLANAR|
                              ANYFLAVOR|ANYSWAPFIRST|ANYSWAP|ANYEXTRA|ANYCHANNELS|ANYSPACE,   PackDoublesFromFloat },
+
+    {     BYTES_SH(2), ANYPLANAR|
+                             ANYFLAVOR|ANYSWAPFIRST|ANYSWAP|ANYEXTRA|ANYCHANNELS|ANYSPACE,   PackWordsFromFloat },
+
+    {     BYTES_SH(1), ANYPLANAR|
+                             ANYFLAVOR|ANYSWAPFIRST|ANYSWAP|ANYEXTRA|ANYCHANNELS|ANYSPACE,   PackBytesFromFloat },
+
 #ifndef CMS_NO_HALF_SUPPORT 
     {     FLOAT_SH(1)|BYTES_SH(2),                                   
                              ANYFLAVOR|ANYSWAPFIRST|ANYSWAP|ANYEXTRA|ANYCHANNELS|ANYSPACE,   PackHalfFromFloat },
@@ -3861,7 +4044,7 @@ cmsUInt32Number CMSEXPORT cmsFormatterForPCSOfProfile(cmsHPROFILE hProfile, cmsU
     cmsColorSpaceSignature ColorSpace = cmsGetPCS(hProfile);
 
     cmsUInt32Number ColorSpaceBits = (cmsUInt32Number) _cmsLCMScolorSpace(ColorSpace);
-    cmsUInt32Number nOutputChans = cmsChannelsOf(ColorSpace);
+    cmsInt32Number  nOutputChans = cmsChannelsOfColorSpace(ColorSpace);
     cmsUInt32Number Float = lIsFloat ? 1U : 0;
 
     // Unsupported color space?
@@ -3870,4 +4053,3 @@ cmsUInt32Number CMSEXPORT cmsFormatterForPCSOfProfile(cmsHPROFILE hProfile, cmsU
     // Create a fake formatter for result
     return FLOAT_SH(Float) | COLORSPACE_SH(ColorSpaceBits) | BYTES_SH(nBytes) | CHANNELS_SH(nOutputChans);
 }
-

libs/lcms2/src/cmsplugin.c

@@ -364,12 +364,7 @@ cmsBool CMSEXPORT  _cmsWriteXYZNumber(cmsIOHANDLER* io, const cmsCIEXYZ* XYZ)
 // from Fixed point 8.8 to double
 cmsFloat64Number CMSEXPORT _cms8Fixed8toDouble(cmsUInt16Number fixed8)
 {
-       cmsUInt8Number  msb, lsb;
-
-       lsb = (cmsUInt8Number) (fixed8 & 0xff);
-       msb = (cmsUInt8Number) (((cmsUInt16Number) fixed8 >> 8) & 0xff);
-
-       return (cmsFloat64Number) ((cmsFloat64Number) msb + ((cmsFloat64Number) lsb / 256.0));
+    return fixed8 / 256.0;
 }
 
 cmsUInt16Number CMSEXPORT _cmsDoubleTo8Fixed8(cmsFloat64Number val)
@@ -381,19 +376,7 @@ cmsUInt16Number CMSEXPORT _cmsDoubleTo8Fixed8(cmsFloat64Number val)
 // from Fixed point 15.16 to double
 cmsFloat64Number CMSEXPORT _cms15Fixed16toDouble(cmsS15Fixed16Number fix32)
 {
-    cmsFloat64Number floater, sign, mid;
-    int Whole, FracPart;
-
-    sign  = (fix32 < 0 ? -1 : 1);
-    fix32 = abs(fix32);
-
-    Whole     = (cmsUInt16Number)(fix32 >> 16) & 0xffff;
-    FracPart  = (cmsUInt16Number)(fix32 & 0xffff);
-
-    mid     = (cmsFloat64Number) FracPart / 65536.0;
-    floater = (cmsFloat64Number) Whole + mid;
-
-    return sign * floater;
+    return fix32 / 65536.0;
 }
 
 // from double to Fixed point 15.16

libs/lcms2/src/cmssamp.c

@@ -123,7 +123,7 @@ cmsBool  BlackPointAsDarkerColorant(cmsHPROFILE    hInput,
     // Convert black to Lab
     cmsDoTransform(xform, Black, &Lab, 1);
 
-    // Force it to be neutral, check for inconsistences
+    // Force it to be neutral, check for inconsistencies
     Lab.a = Lab.b = 0;
     if (Lab.L > 50 || Lab.L < 0) Lab.L = 0;
 

libs/lcms2/src/cmsvirt.c

@@ -406,10 +406,9 @@ cmsHPROFILE CMSEXPORT cmsCreateInkLimitingDeviceLinkTHR(cmsContext ContextID,
 
     if (Limit < 0.0 || Limit > 400) {
 
-        cmsSignalError(ContextID, cmsERROR_RANGE, "InkLimiting: Limit should be between 0..400");
-        if (Limit < 0) Limit = 0;
+        cmsSignalError(ContextID, cmsERROR_RANGE, "InkLimiting: Limit should be between 1..400");
+        if (Limit < 1) Limit = 1;
         if (Limit > 400) Limit = 400;
-
     }
 
     hICC = cmsCreateProfilePlaceholder(ContextID);
@@ -672,6 +671,127 @@ cmsHPROFILE CMSEXPORT cmsCreate_sRGBProfile(void)
     return cmsCreate_sRGBProfileTHR(NULL);
 }
 
+/**
+* Oklab colorspace profile (experimental)
+*
+* This virtual profile cannot be saved as an ICC file
+*/
+cmsHPROFILE cmsCreate_OkLabProfile(cmsContext ctx)
+{
+    cmsStage* XYZPCS = _cmsStageNormalizeFromXyzFloat(ctx);
+    cmsStage* PCSXYZ = _cmsStageNormalizeToXyzFloat(ctx);
+
+    const double M_D65_D50[] =
+    {
+       1.047886, 0.022919, -0.050216,
+       0.029582, 0.990484, -0.017079,
+      -0.009252, 0.015073,  0.751678
+    };
+
+    const double M_D50_D65[] =
+    {
+         0.955512609517083, -0.023073214184645,  0.063308961782107,
+        -0.028324949364887,  1.009942432477107,  0.021054814890112,
+         0.012328875695483, -0.020535835374141,  1.330713916450354
+    };
+
+    cmsStage* D65toD50 = cmsStageAllocMatrix(ctx, 3, 3, M_D65_D50, NULL);
+    cmsStage* D50toD65 = cmsStageAllocMatrix(ctx, 3, 3, M_D50_D65, NULL);
+
+    const double M_D65_LMS[] =
+    {
+        0.8189330101, 0.3618667424, -0.1288597137,
+        0.0329845436, 0.9293118715,  0.0361456387,
+        0.0482003018, 0.2643662691,  0.6338517070
+    };
+
+    const double M_LMS_D65[] =
+    {
+        1.227013851103521, -0.557799980651822,  0.281256148966468,
+       -0.040580178423281,  1.112256869616830, -0.071676678665601,
+       -0.076381284505707, -0.421481978418013,  1.586163220440795
+    };
+
+    cmsStage* D65toLMS = cmsStageAllocMatrix(ctx, 3, 3, M_D65_LMS, NULL);
+    cmsStage* LMStoD65 = cmsStageAllocMatrix(ctx, 3, 3, M_LMS_D65, NULL);
+
+    cmsToneCurve* CubeRoot = cmsBuildGamma(ctx, 1.0 / 3.0);
+    cmsToneCurve* Cube     = cmsBuildGamma(ctx,  3.0);
+
+    cmsToneCurve* Roots[3] = { CubeRoot, CubeRoot, CubeRoot };
+    cmsToneCurve* Cubes[3] = { Cube, Cube, Cube };
+
+    cmsStage* NonLinearityFw = cmsStageAllocToneCurves(ctx, 3, Roots);
+    cmsStage* NonLinearityRv = cmsStageAllocToneCurves(ctx, 3, Cubes);
+
+    const double M_LMSprime_OkLab[] =
+    {
+        0.2104542553,  0.7936177850, -0.0040720468,
+        1.9779984951, -2.4285922050,  0.4505937099,
+        0.0259040371,  0.7827717662, -0.8086757660
+    };
+
+    const double M_OkLab_LMSprime[] =
+    {
+        0.999999998450520,  0.396337792173768,  0.215803758060759,
+        1.000000008881761, -0.105561342323656, -0.063854174771706,
+        1.000000054672411, -0.089484182094966, -1.291485537864092
+    };
+
+    cmsStage* LMSprime_OkLab = cmsStageAllocMatrix(ctx, 3, 3, M_LMSprime_OkLab, NULL);
+    cmsStage* OkLab_LMSprime = cmsStageAllocMatrix(ctx, 3, 3, M_OkLab_LMSprime, NULL);
+
+    cmsPipeline* AToB = cmsPipelineAlloc(ctx, 3, 3);
+    cmsPipeline* BToA = cmsPipelineAlloc(ctx, 3, 3);
+
+    cmsHPROFILE hProfile = cmsCreateProfilePlaceholder(ctx);
+
+    cmsSetProfileVersion(hProfile, 4.4);
+
+    cmsSetDeviceClass(hProfile, cmsSigColorSpaceClass);
+    cmsSetColorSpace(hProfile, cmsSig3colorData);
+    cmsSetPCS(hProfile, cmsSigXYZData);
+
+    cmsSetHeaderRenderingIntent(hProfile, INTENT_RELATIVE_COLORIMETRIC);
+
+    /**
+    * Conversion PCS (XYZ/D50) to OkLab
+    */
+    if (!cmsPipelineInsertStage(BToA, cmsAT_END, PCSXYZ)) goto error;
+    if (!cmsPipelineInsertStage(BToA, cmsAT_END, D50toD65)) goto error;
+    if (!cmsPipelineInsertStage(BToA, cmsAT_END, D65toLMS)) goto error;
+    if (!cmsPipelineInsertStage(BToA, cmsAT_END, NonLinearityFw)) goto error;
+    if (!cmsPipelineInsertStage(BToA, cmsAT_END, LMSprime_OkLab)) goto error;
+
+    if (!cmsWriteTag(hProfile, cmsSigBToA0Tag, BToA)) goto error;
+
+    if (!cmsPipelineInsertStage(AToB, cmsAT_END, OkLab_LMSprime)) goto error;
+    if (!cmsPipelineInsertStage(AToB, cmsAT_END, NonLinearityRv)) goto error;
+    if (!cmsPipelineInsertStage(AToB, cmsAT_END, LMStoD65)) goto error;
+    if (!cmsPipelineInsertStage(AToB, cmsAT_END, D65toD50)) goto error;
+    if (!cmsPipelineInsertStage(AToB, cmsAT_END, XYZPCS)) goto error;
+
+    if (!cmsWriteTag(hProfile, cmsSigAToB0Tag, AToB)) goto error;
+
+    cmsPipelineFree(BToA);
+    cmsPipelineFree(AToB);
+
+    cmsFreeToneCurve(CubeRoot);
+    cmsFreeToneCurve(Cube);
+
+    return hProfile;
+
+error:
+    cmsPipelineFree(BToA);
+    cmsPipelineFree(AToB);
+
+    cmsFreeToneCurve(CubeRoot);
+    cmsFreeToneCurve(Cube);
+    cmsCloseProfile(hProfile);
+
+    return NULL;
+
+}
 
 
 typedef struct {
@@ -1031,7 +1151,7 @@ cmsBool CheckOne(const cmsAllowedLUT* Tab, const cmsPipeline* Lut)
 
     for (n=0, mpe = Lut ->Elements; mpe != NULL; mpe = mpe ->Next, n++) {
 
-        if (n > Tab ->nTypes) return FALSE;
+        if (n >= Tab ->nTypes) return FALSE;
         if (cmsStageType(mpe) != Tab ->MpeTypes[n]) return FALSE;
     }
 
@@ -1062,9 +1182,9 @@ const cmsAllowedLUT* FindCombination(const cmsPipeline* Lut, cmsBool IsV4, cmsTa
 cmsHPROFILE CMSEXPORT cmsTransform2DeviceLink(cmsHTRANSFORM hTransform, cmsFloat64Number Version, cmsUInt32Number dwFlags)
 {
     cmsHPROFILE hProfile = NULL;
-	cmsUInt32Number FrmIn, FrmOut;
-	cmsInt32Number ChansIn, ChansOut;
-	int ColorSpaceBitsIn, ColorSpaceBitsOut;
+    cmsUInt32Number FrmIn, FrmOut;
+    cmsInt32Number ChansIn, ChansOut;
+    int ColorSpaceBitsIn, ColorSpaceBitsOut;
     _cmsTRANSFORM* xform = (_cmsTRANSFORM*) hTransform;
     cmsPipeline* LUT = NULL;
     cmsStage* mpe;
@@ -1075,6 +1195,9 @@ cmsHPROFILE CMSEXPORT cmsTransform2DeviceLink(cmsHTRANSFORM hTransform, cmsFloat
 
     _cmsAssert(hTransform != NULL);
 
+    // Check if the pipeline holding is valid
+    if (xform -> Lut == NULL) return NULL;
+
     // Get the first mpe to check for named color
     mpe = cmsPipelineGetPtrToFirstStage(xform ->Lut);
 

libs/lcms2/src/cmsxform.c

@@ -914,7 +914,7 @@ _cmsTRANSFORM* AllocEmptyTransform(cmsContext ContextID, cmsPipeline* lut,
        }
 
     // Check whatever this is a true floating point transform
-    if (_cmsFormatterIsFloat(*OutputFormat)) {
+    if (_cmsFormatterIsFloat(*InputFormat) || _cmsFormatterIsFloat(*OutputFormat)) {
 
         // Get formatter function always return a valid union, but the contents of this union may be NULL.
         p ->FromInputFloat = _cmsGetFormatter(ContextID, *InputFormat,  cmsFormatterInput, CMS_PACK_FLAGS_FLOAT).FmtFloat;
@@ -989,6 +989,19 @@ _cmsTRANSFORM* AllocEmptyTransform(cmsContext ContextID, cmsPipeline* lut,
         }
     }
 
+    /**
+    * Check consistency for alpha channel copy
+    */
+    if (*dwFlags & cmsFLAGS_COPY_ALPHA)
+    {
+        if (T_EXTRA(*InputFormat) != T_EXTRA(*OutputFormat))
+        {
+            cmsSignalError(ContextID, cmsERROR_NOT_SUITABLE, "Mismatched alpha channels");
+            cmsDeleteTransform(p);
+            return NULL;
+        }
+    }
+
     p ->InputFormat     = *InputFormat;
     p ->OutputFormat    = *OutputFormat;
     p ->dwOriginalFlags = *dwFlags;

libs/lcms2/src/lcms2_internal.h

@@ -260,6 +260,7 @@ typedef CRITICAL_SECTION _cmsMutex;
 #ifdef _MSC_VER
 #    if (_MSC_VER >= 1800)
 #          pragma warning(disable : 26135)
+#          pragma warning(disable : 4127)
 #    endif
 #endif
 
@@ -517,7 +518,7 @@ struct _cmsContext_struct {
     struct _cmsContext_struct* Next;  // Points to next context in the new style
     _cmsSubAllocator* MemPool;        // The memory pool that stores context data
     
-    void* chunks[MemoryClientMax];    // array of pointers to client chunks. Memory itself is hold in the suballocator. 
+    void* chunks[MemoryClientMax];    // array of pointers to client chunks. Memory itself is held in the suballocator.
                                       // If NULL, then it reverts to global Context0
 
     _cmsMemPluginChunkType DefaultMemoryManager;  // The allocators used for creating the context itself. Cannot be overridden
@@ -811,6 +812,9 @@ typedef struct _cms_iccprofile_struct {
     // Creation time
     struct tm                Created;
 
+    // Color management module identification
+    cmsUInt32Number          CMM;
+
     // Only most important items found in ICC profiles
     cmsUInt32Number          Version;
     cmsProfileClassSignature DeviceClass;
@@ -818,6 +822,7 @@ typedef struct _cms_iccprofile_struct {
     cmsColorSpaceSignature   PCS;
     cmsUInt32Number          RenderingIntent;
 
+    cmsPlatformSignature     platform;
     cmsUInt32Number          flags;
     cmsUInt32Number          manufacturer, model;
     cmsUInt64Number          attributes;