Merge to XFA: Move lcms2 into third_party

Original Review URL: https://codereview.chromium.org/1181943008.
TBR=thestig@chromium.org

Review URL: https://codereview.chromium.org/1187273006.

1 files changed, 955 insertions, 0 deletions

diff --git a/third_party/lcms2-2.6/src/cmsplugin.c b/third_party/lcms2-2.6/src/cmsplugin.c
new file mode 100644
index 0000000000..8903d2bd61
--- /dev/null
+++ b/third_party/lcms2-2.6/src/cmsplugin.c
@@ -0,0 +1,955 @@
+//---------------------------------------------------------------------------------
+//
+//  Little Color Management System
+//  Copyright (c) 1998-2010 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"
+
+
+// ----------------------------------------------------------------------------------
+// Encoding & Decoding support functions
+// ----------------------------------------------------------------------------------
+
+//      Little-Endian to Big-Endian
+
+// Adjust a word value after being readed/ before being written from/to an ICC profile
+cmsUInt16Number CMSEXPORT  _cmsAdjustEndianess16(cmsUInt16Number Word)
+{
+#ifndef CMS_USE_BIG_ENDIAN
+
+    cmsUInt8Number* pByte = (cmsUInt8Number*) &Word;
+    cmsUInt8Number tmp;
+
+    tmp = pByte[0];
+    pByte[0] = pByte[1];
+    pByte[1] = tmp;
+#endif
+
+    return Word;
+}
+
+
+// Transports to properly encoded values - note that icc profiles does use big endian notation.
+
+// 1 2 3 4
+// 4 3 2 1
+
+cmsUInt32Number CMSEXPORT  _cmsAdjustEndianess32(cmsUInt32Number DWord)
+{
+#ifndef CMS_USE_BIG_ENDIAN
+
+    cmsUInt8Number* pByte = (cmsUInt8Number*) &DWord;
+    cmsUInt8Number temp1;
+    cmsUInt8Number temp2;
+
+    temp1 = *pByte++;
+    temp2 = *pByte++;
+    *(pByte-1) = *pByte;
+    *pByte++ = temp2;
+    *(pByte-3) = *pByte;
+    *pByte = temp1;
+#endif
+    return DWord;
+}
+
+// 1 2 3 4 5 6 7 8
+// 8 7 6 5 4 3 2 1
+
+void CMSEXPORT  _cmsAdjustEndianess64(cmsUInt64Number* Result, cmsUInt64Number* QWord)
+{
+
+#ifndef CMS_USE_BIG_ENDIAN
+
+    cmsUInt8Number* pIn  = (cmsUInt8Number*) QWord;
+    cmsUInt8Number* pOut = (cmsUInt8Number*) Result;
+
+    _cmsAssert(Result != NULL);
+
+    pOut[7] = pIn[0];
+    pOut[6] = pIn[1];
+    pOut[5] = pIn[2];
+    pOut[4] = pIn[3];
+    pOut[3] = pIn[4];
+    pOut[2] = pIn[5];
+    pOut[1] = pIn[6];
+    pOut[0] = pIn[7];
+
+#else
+    _cmsAssert(Result != NULL);
+
+#  ifdef CMS_DONT_USE_INT64
+    (*Result)[0] = QWord[0];
+    (*Result)[1] = QWord[1];
+#  else
+    *Result = *QWord;
+#  endif
+#endif
+}
+
+// Auxiliar -- read 8, 16 and 32-bit numbers
+cmsBool CMSEXPORT  _cmsReadUInt8Number(cmsIOHANDLER* io, cmsUInt8Number* n)
+{
+    cmsUInt8Number tmp;
+
+    _cmsAssert(io != NULL);
+
+    if (io -> Read(io, &tmp, sizeof(cmsUInt8Number), 1) != 1)
+            return FALSE;
+
+    if (n != NULL) *n = tmp;
+    return TRUE;
+}
+
+cmsBool CMSEXPORT  _cmsReadUInt16Number(cmsIOHANDLER* io, cmsUInt16Number* n)
+{
+    cmsUInt16Number tmp;
+
+    _cmsAssert(io != NULL);
+
+    if (io -> Read(io, &tmp, sizeof(cmsUInt16Number), 1) != 1)
+            return FALSE;
+
+    if (n != NULL) *n = _cmsAdjustEndianess16(tmp);
+    return TRUE;
+}
+
+cmsBool CMSEXPORT  _cmsReadUInt16Array(cmsIOHANDLER* io, cmsUInt32Number n, cmsUInt16Number* Array)
+{
+    cmsUInt32Number i;
+
+    _cmsAssert(io != NULL);
+
+    for (i=0; i < n; i++) {
+
+        if (Array != NULL) {
+            if (!_cmsReadUInt16Number(io, Array + i)) return FALSE;
+        }
+        else {
+            if (!_cmsReadUInt16Number(io, NULL)) return FALSE;
+        }
+
+    }
+    return TRUE;
+}
+
+cmsBool CMSEXPORT  _cmsReadUInt32Number(cmsIOHANDLER* io, cmsUInt32Number* n)
+{
+    cmsUInt32Number tmp;
+
+    _cmsAssert(io != NULL);
+
+    if (io -> Read(io, &tmp, sizeof(cmsUInt32Number), 1) != 1)
+            return FALSE;
+
+    if (n != NULL) *n = _cmsAdjustEndianess32(tmp);
+    return TRUE;
+}
+
+cmsBool CMSEXPORT  _cmsReadFloat32Number(cmsIOHANDLER* io, cmsFloat32Number* n)
+{
+    cmsUInt32Number tmp;
+
+    _cmsAssert(io != NULL);
+
+    if (io -> Read(io, &tmp, sizeof(cmsFloat32Number), 1) != 1)
+            return FALSE;
+
+    if (n != NULL) {
+
+        tmp = _cmsAdjustEndianess32(tmp);
+        *n = *(cmsFloat32Number*) &tmp;
+    }
+    return TRUE;
+}
+
+
+cmsBool CMSEXPORT   _cmsReadUInt64Number(cmsIOHANDLER* io, cmsUInt64Number* n)
+{
+    cmsUInt64Number tmp;
+
+    _cmsAssert(io != NULL);
+
+    if (io -> Read(io, &tmp, sizeof(cmsUInt64Number), 1) != 1)
+            return FALSE;
+
+    if (n != NULL) _cmsAdjustEndianess64(n, &tmp);
+    return TRUE;
+}
+
+
+cmsBool CMSEXPORT  _cmsRead15Fixed16Number(cmsIOHANDLER* io, cmsFloat64Number* n)
+{
+    cmsUInt32Number tmp;
+
+    _cmsAssert(io != NULL);
+
+    if (io -> Read(io, &tmp, sizeof(cmsUInt32Number), 1) != 1)
+            return FALSE;
+
+    if (n != NULL) {
+        *n = _cms15Fixed16toDouble(_cmsAdjustEndianess32(tmp));
+    }
+
+    return TRUE;
+}
+
+
+// Jun-21-2000: Some profiles (those that comes with W2K) comes
+// with the media white (media black?) x 100. Add a sanity check
+
+static
+void NormalizeXYZ(cmsCIEXYZ* Dest)
+{
+    while (Dest -> X > 2. &&
+           Dest -> Y > 2. &&
+           Dest -> Z > 2.) {
+
+               Dest -> X /= 10.;
+               Dest -> Y /= 10.;
+               Dest -> Z /= 10.;
+       }
+}
+
+cmsBool CMSEXPORT  _cmsReadXYZNumber(cmsIOHANDLER* io, cmsCIEXYZ* XYZ)
+{
+    cmsEncodedXYZNumber xyz;
+
+    _cmsAssert(io != NULL);
+
+    if (io ->Read(io, &xyz, sizeof(cmsEncodedXYZNumber), 1) != 1) return FALSE;
+
+    if (XYZ != NULL) {
+
+        XYZ->X = _cms15Fixed16toDouble(_cmsAdjustEndianess32(xyz.X));
+        XYZ->Y = _cms15Fixed16toDouble(_cmsAdjustEndianess32(xyz.Y));
+        XYZ->Z = _cms15Fixed16toDouble(_cmsAdjustEndianess32(xyz.Z));
+
+        NormalizeXYZ(XYZ);
+    }
+    return TRUE;
+}
+
+cmsBool CMSEXPORT  _cmsWriteUInt8Number(cmsIOHANDLER* io, cmsUInt8Number n)
+{
+    _cmsAssert(io != NULL);
+
+    if (io -> Write(io, sizeof(cmsUInt8Number), &n) != 1)
+            return FALSE;
+
+    return TRUE;
+}
+
+cmsBool CMSEXPORT  _cmsWriteUInt16Number(cmsIOHANDLER* io, cmsUInt16Number n)
+{
+    cmsUInt16Number tmp;
+
+    _cmsAssert(io != NULL);
+
+    tmp = _cmsAdjustEndianess16(n);
+    if (io -> Write(io, sizeof(cmsUInt16Number), &tmp) != 1)
+            return FALSE;
+
+    return TRUE;
+}
+
+cmsBool CMSEXPORT  _cmsWriteUInt16Array(cmsIOHANDLER* io, cmsUInt32Number n, const cmsUInt16Number* Array)
+{
+    cmsUInt32Number i;
+
+    _cmsAssert(io != NULL);
+    _cmsAssert(Array != NULL);
+
+    for (i=0; i < n; i++) {
+        if (!_cmsWriteUInt16Number(io, Array[i])) return FALSE;
+    }
+
+    return TRUE;
+}
+
+cmsBool CMSEXPORT  _cmsWriteUInt32Number(cmsIOHANDLER* io, cmsUInt32Number n)
+{
+    cmsUInt32Number tmp;
+
+    _cmsAssert(io != NULL);
+
+    tmp = _cmsAdjustEndianess32(n);
+    if (io -> Write(io, sizeof(cmsUInt32Number), &tmp) != 1)
+            return FALSE;
+
+    return TRUE;
+}
+
+
+cmsBool CMSEXPORT  _cmsWriteFloat32Number(cmsIOHANDLER* io, cmsFloat32Number n)
+{
+    cmsUInt32Number tmp;
+
+    _cmsAssert(io != NULL);
+
+    tmp = *(cmsUInt32Number*) &n;
+    tmp = _cmsAdjustEndianess32(tmp);
+    if (io -> Write(io, sizeof(cmsUInt32Number), &tmp) != 1)
+            return FALSE;
+
+    return TRUE;
+}
+
+cmsBool CMSEXPORT  _cmsWriteUInt64Number(cmsIOHANDLER* io, cmsUInt64Number* n)
+{
+    cmsUInt64Number tmp;
+
+    _cmsAssert(io != NULL);
+
+    _cmsAdjustEndianess64(&tmp, n);
+    if (io -> Write(io, sizeof(cmsUInt64Number), &tmp) != 1)
+            return FALSE;
+
+    return TRUE;
+}
+
+cmsBool CMSEXPORT  _cmsWrite15Fixed16Number(cmsIOHANDLER* io, cmsFloat64Number n)
+{
+    cmsUInt32Number tmp;
+
+    _cmsAssert(io != NULL);
+
+    tmp = _cmsAdjustEndianess32(_cmsDoubleTo15Fixed16(n));
+    if (io -> Write(io, sizeof(cmsUInt32Number), &tmp) != 1)
+            return FALSE;
+
+    return TRUE;
+}
+
+cmsBool CMSEXPORT  _cmsWriteXYZNumber(cmsIOHANDLER* io, const cmsCIEXYZ* XYZ)
+{
+    cmsEncodedXYZNumber xyz;
+
+    _cmsAssert(io != NULL);
+    _cmsAssert(XYZ != NULL);
+
+    xyz.X = _cmsAdjustEndianess32(_cmsDoubleTo15Fixed16(XYZ->X));
+    xyz.Y = _cmsAdjustEndianess32(_cmsDoubleTo15Fixed16(XYZ->Y));
+    xyz.Z = _cmsAdjustEndianess32(_cmsDoubleTo15Fixed16(XYZ->Z));
+
+    return io -> Write(io,  sizeof(cmsEncodedXYZNumber), &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));
+}
+
+cmsUInt16Number CMSEXPORT _cmsDoubleTo8Fixed8(cmsFloat64Number val)
+{
+    cmsS15Fixed16Number GammaFixed32 = _cmsDoubleTo15Fixed16(val);
+    return  (cmsUInt16Number) ((GammaFixed32 >> 8) & 0xFFFF);
+}
+
+// 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;
+}
+
+// from double to Fixed point 15.16
+cmsS15Fixed16Number CMSEXPORT _cmsDoubleTo15Fixed16(cmsFloat64Number v)
+{
+    return ((cmsS15Fixed16Number) floor((v)*65536.0 + 0.5));
+}
+
+// Date/Time functions
+
+void CMSEXPORT _cmsDecodeDateTimeNumber(const cmsDateTimeNumber *Source, struct tm *Dest)
+{
+
+    _cmsAssert(Dest != NULL);
+    _cmsAssert(Source != NULL);
+
+    Dest->tm_sec   = _cmsAdjustEndianess16(Source->seconds);
+    Dest->tm_min   = _cmsAdjustEndianess16(Source->minutes);
+    Dest->tm_hour  = _cmsAdjustEndianess16(Source->hours);
+    Dest->tm_mday  = _cmsAdjustEndianess16(Source->day);
+    Dest->tm_mon   = _cmsAdjustEndianess16(Source->month) - 1;
+    Dest->tm_year  = _cmsAdjustEndianess16(Source->year) - 1900;
+    Dest->tm_wday  = -1;
+    Dest->tm_yday  = -1;
+    Dest->tm_isdst = 0;
+}
+
+void CMSEXPORT _cmsEncodeDateTimeNumber(cmsDateTimeNumber *Dest, const struct tm *Source)
+{
+    _cmsAssert(Dest != NULL);
+    _cmsAssert(Source != NULL);
+
+    Dest->seconds = _cmsAdjustEndianess16((cmsUInt16Number) Source->tm_sec);
+    Dest->minutes = _cmsAdjustEndianess16((cmsUInt16Number) Source->tm_min);
+    Dest->hours   = _cmsAdjustEndianess16((cmsUInt16Number) Source->tm_hour);
+    Dest->day     = _cmsAdjustEndianess16((cmsUInt16Number) Source->tm_mday);
+    Dest->month   = _cmsAdjustEndianess16((cmsUInt16Number) (Source->tm_mon + 1));
+    Dest->year    = _cmsAdjustEndianess16((cmsUInt16Number) (Source->tm_year + 1900));
+}
+
+// Read base and return type base
+cmsTagTypeSignature CMSEXPORT _cmsReadTypeBase(cmsIOHANDLER* io)
+{
+    _cmsTagBase Base;
+
+    _cmsAssert(io != NULL);
+
+    if (io -> Read(io, &Base, sizeof(_cmsTagBase), 1) != 1)
+        return (cmsTagTypeSignature) 0;
+
+    return (cmsTagTypeSignature) _cmsAdjustEndianess32(Base.sig);
+}
+
+// Setup base marker
+cmsBool  CMSEXPORT _cmsWriteTypeBase(cmsIOHANDLER* io, cmsTagTypeSignature sig)
+{
+    _cmsTagBase  Base;
+
+    _cmsAssert(io != NULL);
+
+    Base.sig = (cmsTagTypeSignature) _cmsAdjustEndianess32(sig);
+    memset(&Base.reserved, 0, sizeof(Base.reserved));
+    return io -> Write(io, sizeof(_cmsTagBase), &Base);
+}
+
+cmsBool CMSEXPORT _cmsReadAlignment(cmsIOHANDLER* io)
+{
+    cmsUInt8Number  Buffer[4];
+    cmsUInt32Number NextAligned, At;
+    cmsUInt32Number BytesToNextAlignedPos;
+
+    _cmsAssert(io != NULL);
+
+    At = io -> Tell(io);
+    NextAligned = _cmsALIGNLONG(At);
+    BytesToNextAlignedPos = NextAligned - At;
+    if (BytesToNextAlignedPos == 0) return TRUE;
+    if (BytesToNextAlignedPos > 4)  return FALSE;
+
+    return (io ->Read(io, Buffer, BytesToNextAlignedPos, 1) == 1);
+}
+
+cmsBool CMSEXPORT _cmsWriteAlignment(cmsIOHANDLER* io)
+{
+    cmsUInt8Number  Buffer[4];
+    cmsUInt32Number NextAligned, At;
+    cmsUInt32Number BytesToNextAlignedPos;
+
+    _cmsAssert(io != NULL);
+
+    At = io -> Tell(io);
+    NextAligned = _cmsALIGNLONG(At);
+    BytesToNextAlignedPos = NextAligned - At;
+    if (BytesToNextAlignedPos == 0) return TRUE;
+    if (BytesToNextAlignedPos > 4)  return FALSE;
+
+    memset(Buffer, 0, BytesToNextAlignedPos);
+    return io -> Write(io, BytesToNextAlignedPos, Buffer);
+}
+
+
+// To deal with text streams. 2K at most
+cmsBool CMSEXPORT _cmsIOPrintf(cmsIOHANDLER* io, const char* frm, ...)
+{
+    va_list args;
+    int len;
+    cmsUInt8Number Buffer[2048];
+    cmsBool rc;
+
+    _cmsAssert(io != NULL);
+    _cmsAssert(frm != NULL);
+
+    va_start(args, frm);
+
+    len = vsnprintf((char*) Buffer, 2047, frm, args);
+    if (len < 0) return FALSE;   // Truncated, which is a fatal error for us
+
+    rc = io ->Write(io, len, Buffer);
+
+    va_end(args);
+
+    return rc;
+}
+
+
+// Plugin memory management -------------------------------------------------------------------------------------------------
+
+// Specialized malloc for plug-ins, that is freed upon exit.
+void* _cmsPluginMalloc(cmsContext ContextID, cmsUInt32Number size)
+{
+    struct _cmsContext_struct* ctx = _cmsGetContext(ContextID);
+
+    if (ctx ->MemPool == NULL) {
+
+        if (ContextID == NULL) {
+
+            ctx->MemPool = _cmsCreateSubAlloc(0, 2*1024);
+        }
+        else {
+            cmsSignalError(ContextID, cmsERROR_CORRUPTION_DETECTED, "NULL memory pool on context");
+            return NULL;
+        }
+    }
+
+    return _cmsSubAlloc(ctx->MemPool, size);
+}
+
+
+// Main plug-in dispatcher
+cmsBool CMSEXPORT cmsPlugin(void* Plug_in)
+{
+    return cmsPluginTHR(NULL, Plug_in);
+}
+
+cmsBool CMSEXPORT cmsPluginTHR(cmsContext id, void* Plug_in)
+{
+    cmsPluginBase* Plugin;
+
+    for (Plugin = (cmsPluginBase*) Plug_in;
+         Plugin != NULL;
+         Plugin = Plugin -> Next) {
+
+            if (Plugin -> Magic != cmsPluginMagicNumber) {
+                cmsSignalError(id, cmsERROR_UNKNOWN_EXTENSION, "Unrecognized plugin");
+                return FALSE;
+            }
+
+            if (Plugin ->ExpectedVersion > LCMS_VERSION) {
+                cmsSignalError(id, cmsERROR_UNKNOWN_EXTENSION, "plugin needs Little CMS %d, current version is %d",
+                    Plugin ->ExpectedVersion, LCMS_VERSION);
+                return FALSE;
+            }
+
+            switch (Plugin -> Type) {
+
+                case cmsPluginMemHandlerSig:
+                    if (!_cmsRegisterMemHandlerPlugin(id, Plugin)) return FALSE;
+                    break;
+
+                case cmsPluginInterpolationSig:
+                    if (!_cmsRegisterInterpPlugin(id, Plugin)) return FALSE;
+                    break;
+
+                case cmsPluginTagTypeSig:
+                    if (!_cmsRegisterTagTypePlugin(id, Plugin)) return FALSE;
+                    break;
+
+                case cmsPluginTagSig:
+                    if (!_cmsRegisterTagPlugin(id, Plugin)) return FALSE;
+                    break;
+
+                case cmsPluginFormattersSig:
+                    if (!_cmsRegisterFormattersPlugin(id, Plugin)) return FALSE;
+                    break;
+
+                case cmsPluginRenderingIntentSig:
+                    if (!_cmsRegisterRenderingIntentPlugin(id, Plugin)) return FALSE;
+                    break;
+
+                case cmsPluginParametricCurveSig:
+                    if (!_cmsRegisterParametricCurvesPlugin(id, Plugin)) return FALSE;
+                    break;
+
+                case cmsPluginMultiProcessElementSig:
+                    if (!_cmsRegisterMultiProcessElementPlugin(id, Plugin)) return FALSE;
+                    break;
+
+                case cmsPluginOptimizationSig:
+                    if (!_cmsRegisterOptimizationPlugin(id, Plugin)) return FALSE;
+                    break;
+
+                case cmsPluginTransformSig:
+                    if (!_cmsRegisterTransformPlugin(id, Plugin)) return FALSE;
+                    break;
+
+                case cmsPluginMutexSig:
+                    if (!_cmsRegisterMutexPlugin(id, Plugin)) return FALSE;
+                    break;
+
+                default:
+                    cmsSignalError(id, cmsERROR_UNKNOWN_EXTENSION, "Unrecognized plugin type '%X'", Plugin -> Type);
+                    return FALSE;
+            }
+    }
+
+    // Keep a reference to the plug-in
+    return TRUE;
+}
+
+
+// Revert all plug-ins to default
+void CMSEXPORT cmsUnregisterPlugins(void)
+{
+    cmsUnregisterPluginsTHR(NULL);
+}
+
+
+// The Global storage for system context. This is the one and only global variable
+// pointers structure. All global vars are referenced here.
+static struct _cmsContext_struct globalContext = {
+
+    NULL,                              // Not in the linked list
+    NULL,                              // No suballocator
+    {
+        NULL,                          //  UserPtr,            
+        &_cmsLogErrorChunk,            //  Logger,
+        &_cmsAlarmCodesChunk,          //  AlarmCodes,
+        &_cmsAdaptationStateChunk,     //  AdaptationState, 
+        &_cmsMemPluginChunk,           //  MemPlugin,
+        &_cmsInterpPluginChunk,        //  InterpPlugin,
+        &_cmsCurvesPluginChunk,        //  CurvesPlugin,
+        &_cmsFormattersPluginChunk,    //  FormattersPlugin,
+        &_cmsTagTypePluginChunk,       //  TagTypePlugin,
+        &_cmsTagPluginChunk,           //  TagPlugin,
+        &_cmsIntentsPluginChunk,       //  IntentPlugin,
+        &_cmsMPETypePluginChunk,       //  MPEPlugin,
+        &_cmsOptimizationPluginChunk,  //  OptimizationPlugin,
+        &_cmsTransformPluginChunk,     //  TransformPlugin,
+        &_cmsMutexPluginChunk          //  MutexPlugin
+    },
+    
+    { NULL, NULL, NULL, NULL, NULL, NULL } // The default memory allocator is not used for context 0
+};
+
+
+// The context pool (linked list head)
+static _cmsMutex _cmsContextPoolHeadMutex = CMS_MUTEX_INITIALIZER;
+static struct _cmsContext_struct* _cmsContextPoolHead = NULL;
+
+// Internal, get associated pointer, with guessing. Never returns NULL.
+struct _cmsContext_struct* _cmsGetContext(cmsContext ContextID)
+{
+    struct _cmsContext_struct* id = (struct _cmsContext_struct*) ContextID;
+    struct _cmsContext_struct* ctx;
+
+
+    // On 0, use global settings
+    if (id == NULL) 
+        return &globalContext;
+
+    // Search
+    for (ctx = _cmsContextPoolHead;
+         ctx != NULL;
+         ctx = ctx ->Next) {
+
+            // Found it?
+            if (id == ctx)
+                return ctx; // New-style context, 
+    }
+
+    return &globalContext;
+}
+
+
+// Internal: get the memory area associanted with each context client
+// Returns the block assigned to the specific zone. 
+void* _cmsContextGetClientChunk(cmsContext ContextID, _cmsMemoryClient mc)
+{
+    struct _cmsContext_struct* ctx;
+    void *ptr;
+
+    if (mc >= MemoryClientMax) {
+        cmsSignalError(ContextID, cmsERROR_RANGE, "Bad context client");
+        return NULL;
+    }
+    
+    ctx = _cmsGetContext(ContextID);
+    ptr = ctx ->chunks[mc];
+
+    if (ptr != NULL)
+        return ptr;
+
+    // A null ptr means no special settings for that context, and this 
+    // reverts to Context0 globals
+    return globalContext.chunks[mc];    
+}
+
+
+// This function returns the given context its default pristine state,
+// as no plug-ins were declared. There is no way to unregister a single 
+// plug-in, as a single call to cmsPluginTHR() function may register 
+// many different plug-ins simultaneously, then there is no way to 
+// identify which plug-in to unregister.
+void CMSEXPORT cmsUnregisterPluginsTHR(cmsContext ContextID)
+{
+    _cmsRegisterMemHandlerPlugin(ContextID, NULL);
+    _cmsRegisterInterpPlugin(ContextID, NULL);
+    _cmsRegisterTagTypePlugin(ContextID, NULL);
+    _cmsRegisterTagPlugin(ContextID, NULL);
+    _cmsRegisterFormattersPlugin(ContextID, NULL);
+    _cmsRegisterRenderingIntentPlugin(ContextID, NULL);
+    _cmsRegisterParametricCurvesPlugin(ContextID, NULL);
+    _cmsRegisterMultiProcessElementPlugin(ContextID, NULL);
+    _cmsRegisterOptimizationPlugin(ContextID, NULL);
+    _cmsRegisterTransformPlugin(ContextID, NULL);    
+    _cmsRegisterMutexPlugin(ContextID, NULL);
+}
+
+
+// Returns the memory manager plug-in, if any, from the Plug-in bundle
+static
+cmsPluginMemHandler* _cmsFindMemoryPlugin(void* PluginBundle)
+{
+    cmsPluginBase* Plugin;
+
+    for (Plugin = (cmsPluginBase*) PluginBundle;
+        Plugin != NULL;
+        Plugin = Plugin -> Next) {
+
+            if (Plugin -> Magic == cmsPluginMagicNumber && 
+                Plugin -> ExpectedVersion <= LCMS_VERSION && 
+                Plugin -> Type == cmsPluginMemHandlerSig) {
+
+                    // Found!
+                    return (cmsPluginMemHandler*) Plugin;  
+            }
+    }
+
+    // Nope, revert to defaults 
+    return NULL;
+}
+
+
+// Creates a new context with optional associated plug-ins. Caller may also specify an optional pointer to user-defined 
+// data that will be forwarded to plug-ins and logger.
+cmsContext CMSEXPORT cmsCreateContext(void* Plugin, void* UserData)
+{
+    struct _cmsContext_struct* ctx;
+    struct _cmsContext_struct  fakeContext;
+        
+    _cmsInstallAllocFunctions(_cmsFindMemoryPlugin(Plugin), &fakeContext.DefaultMemoryManager);
+    
+    fakeContext.chunks[UserPtr]     = UserData;
+    fakeContext.chunks[MemPlugin]   = &fakeContext.DefaultMemoryManager;
+
+    // Create the context structure.
+    ctx = (struct _cmsContext_struct*) _cmsMalloc(&fakeContext, sizeof(struct _cmsContext_struct));
+    if (ctx == NULL)   
+        return NULL;     // Something very wrong happened!
+
+    // Init the structure and the memory manager
+    memset(ctx, 0, sizeof(struct _cmsContext_struct));
+
+    // Keep memory manager
+    memcpy(&ctx->DefaultMemoryManager, &fakeContext.DefaultMemoryManager, sizeof(_cmsMemPluginChunk)); 
+   
+    // Maintain the linked list (with proper locking)
+    _cmsEnterCriticalSectionPrimitive(&_cmsContextPoolHeadMutex);
+       ctx ->Next = _cmsContextPoolHead;
+       _cmsContextPoolHead = ctx;
+    _cmsLeaveCriticalSectionPrimitive(&_cmsContextPoolHeadMutex);
+
+    ctx ->chunks[UserPtr]     = UserData;
+    ctx ->chunks[MemPlugin]   = &ctx->DefaultMemoryManager;
+   
+    // Now we can allocate the pool by using default memory manager
+    ctx ->MemPool = _cmsCreateSubAlloc(ctx, 22 * sizeof(void*));  // default size about 32 pointers
+    if (ctx ->MemPool == NULL) {
+
+         cmsDeleteContext(ctx);
+        return NULL;
+    }
+
+    _cmsAllocLogErrorChunk(ctx, NULL);
+    _cmsAllocAlarmCodesChunk(ctx, NULL);
+    _cmsAllocAdaptationStateChunk(ctx, NULL);
+    _cmsAllocMemPluginChunk(ctx, NULL);
+    _cmsAllocInterpPluginChunk(ctx, NULL);
+    _cmsAllocCurvesPluginChunk(ctx, NULL);
+    _cmsAllocFormattersPluginChunk(ctx, NULL);
+    _cmsAllocTagTypePluginChunk(ctx, NULL);
+    _cmsAllocMPETypePluginChunk(ctx, NULL);
+    _cmsAllocTagPluginChunk(ctx, NULL);
+    _cmsAllocIntentsPluginChunk(ctx, NULL);
+    _cmsAllocOptimizationPluginChunk(ctx, NULL);
+    _cmsAllocTransformPluginChunk(ctx, NULL);
+    _cmsAllocMutexPluginChunk(ctx, NULL);
+
+    // Setup the plug-ins
+    if (!cmsPluginTHR(ctx, Plugin)) {
+    
+        cmsDeleteContext(ctx);
+        return NULL;
+    }
+
+    return (cmsContext) ctx;  
+}
+
+// Duplicates a context with all associated plug-ins. 
+// Caller may specify an optional pointer to user-defined 
+// data that will be forwarded to plug-ins and logger. 
+cmsContext CMSEXPORT cmsDupContext(cmsContext ContextID, void* NewUserData)
+{
+    int i;
+    struct _cmsContext_struct* ctx;
+    const struct _cmsContext_struct* src = _cmsGetContext(ContextID);
+
+    void* userData = (NewUserData != NULL) ? NewUserData : src -> chunks[UserPtr];
+    
+    
+    ctx = (struct _cmsContext_struct*) _cmsMalloc(ContextID, sizeof(struct _cmsContext_struct));
+    if (ctx == NULL)   
+        return NULL;     // Something very wrong happened
+
+    // Setup default memory allocators
+    memcpy(&ctx->DefaultMemoryManager, &src->DefaultMemoryManager, sizeof(ctx->DefaultMemoryManager));
+
+    // Maintain the linked list
+    _cmsEnterCriticalSectionPrimitive(&_cmsContextPoolHeadMutex);
+       ctx ->Next = _cmsContextPoolHead;
+       _cmsContextPoolHead = ctx;
+    _cmsLeaveCriticalSectionPrimitive(&_cmsContextPoolHeadMutex);
+
+    ctx ->chunks[UserPtr]    = userData;
+    ctx ->chunks[MemPlugin]  = &ctx->DefaultMemoryManager;
+
+    ctx ->MemPool = _cmsCreateSubAlloc(ctx, 22 * sizeof(void*));
+    if (ctx ->MemPool == NULL) {
+
+         cmsDeleteContext(ctx);
+        return NULL;
+    }
+
+    // Allocate all required chunks.
+    _cmsAllocLogErrorChunk(ctx, src);
+    _cmsAllocAlarmCodesChunk(ctx, src);
+    _cmsAllocAdaptationStateChunk(ctx, src);
+    _cmsAllocMemPluginChunk(ctx, src);
+    _cmsAllocInterpPluginChunk(ctx, src);
+    _cmsAllocCurvesPluginChunk(ctx, src);
+    _cmsAllocFormattersPluginChunk(ctx, src);
+    _cmsAllocTagTypePluginChunk(ctx, src);
+    _cmsAllocMPETypePluginChunk(ctx, src);
+    _cmsAllocTagPluginChunk(ctx, src);
+    _cmsAllocIntentsPluginChunk(ctx, src);
+    _cmsAllocOptimizationPluginChunk(ctx, src);
+    _cmsAllocTransformPluginChunk(ctx, src);
+    _cmsAllocMutexPluginChunk(ctx, src);
+
+    // Make sure no one failed
+    for (i=Logger; i < MemoryClientMax; i++) {
+
+        if (src ->chunks[i] == NULL) {
+            cmsDeleteContext((cmsContext) ctx);
+            return NULL;
+        }
+    }
+
+    return (cmsContext) ctx;
+}
+
+
+
+static
+struct _cmsContext_struct* FindPrev(struct _cmsContext_struct* id)
+{
+    struct _cmsContext_struct* prev;
+
+    // Search for previous
+    for (prev = _cmsContextPoolHead; 
+             prev != NULL;
+             prev = prev ->Next)
+    {
+        if (prev ->Next == id)
+            return prev;
+    }
+
+    return NULL;  // List is empty or only one element!
+}
+
+// Frees any resources associated with the given context, 
+// and destroys the context placeholder. 
+// The ContextID can no longer be used in any THR operation.  
+void CMSEXPORT cmsDeleteContext(cmsContext ContextID)
+{
+    if (ContextID != NULL) {
+
+        struct _cmsContext_struct* ctx = (struct _cmsContext_struct*) ContextID;              
+        struct _cmsContext_struct  fakeContext;  
+        struct _cmsContext_struct* prev;
+
+        memcpy(&fakeContext.DefaultMemoryManager, &ctx->DefaultMemoryManager, sizeof(ctx->DefaultMemoryManager));
+
+        fakeContext.chunks[UserPtr]     = ctx ->chunks[UserPtr];
+        fakeContext.chunks[MemPlugin]   = &fakeContext.DefaultMemoryManager;
+
+        // Get rid of plugins
+        cmsUnregisterPluginsTHR(ContextID); 
+
+        // Since all memory is allocated in the private pool, all what we need to do is destroy the pool
+        if (ctx -> MemPool != NULL)
+              _cmsSubAllocDestroy(ctx ->MemPool);
+        ctx -> MemPool = NULL;
+
+        // Maintain list
+        _cmsEnterCriticalSectionPrimitive(&_cmsContextPoolHeadMutex);
+        if (_cmsContextPoolHead == ctx) { 
+
+            _cmsContextPoolHead = ctx->Next;
+        }
+        else {
+
+            // Search for previous
+            for (prev = _cmsContextPoolHead; 
+                prev != NULL;
+                prev = prev ->Next)
+            {
+                if (prev -> Next == ctx) {
+                    prev -> Next = ctx ->Next;
+                    break;
+                }
+            }
+        }
+        _cmsLeaveCriticalSectionPrimitive(&_cmsContextPoolHeadMutex);
+
+        // free the memory block itself
+        _cmsFree(&fakeContext, ctx);
+    }
+}
+
+// Returns the user data associated to the given ContextID, or NULL if no user data was attached on context creation
+void* CMSEXPORT cmsGetContextUserData(cmsContext ContextID)
+{
+    return _cmsContextGetClientChunk(ContextID, UserPtr);
+}