I'm in the middle of porting my Little CMS application to 2.0 and once I got it
to compile I've encountered a crash. This is under OS X, running 10.6.2, with
Xcode 3.2.1 as the build environment. I'm running from sources found in
lcms2-2.0a.tar.gz.
This is what my stack looks like:
#0 0x00049bff in cmsPipelineCheckAndRetreiveStages at cmslut.c:131
// line #s are not exact since I had put some debugging code in,
// I've removed the debugging code below and indicated the line
#1 0x00030fd5 in FixWhiteMisalignment at cmsopt.c:475
#2 0x00032622 in OptimizeByResampling at cmsopt.c:661
#3 0x0003278c in _cmsOptimizePipeline at cmsopt.c:1620
#4 0x000467be in cmsCreateExtendedTransform at cmsxform.c:541
#5 0x00046b7e in cmsCreateMultiprofileTransformTHR at cmsxform.c:643
#6 0x00046bf6 in cmsCreateTransformTHR at cmsxform.c:684
#7 0x00046c43 in cmsCreateTransform at cmsxform.c:694
#8 0x00016b59 in MakeColorTransform at FineEyeCMS.cpp:341
You can see the crashing line here:
cmsBool CMSEXPORT cmsPipelineCheckAndRetreiveStages(const cmsPipeline* Lut,
cmsUInt32Number n, ...)
{
va_list args;
cmsUInt32Number i;
cmsStage* mpe;
cmsStageSignature Type;
void** ElemPtr;
// Make sure same number of elements
if (cmsPipelineStageCount(Lut) != n) return FALSE;
va_start(args, n);
// Iterate across asked types
mpe = Lut ->Elements;
for (i=0; i < n; i++) {
// Get asked type
Type = va_arg(args, cmsStageSignature); // <<------ crashes here
if (mpe ->Type != Type) {
It certainly looks like the call to va_arg() is what is dying. I do have a
complier warning, cmsStageSignature is promoted to 'int' when passed through
'...'
That may just be a red herring or it may be important.
Here is the caller:
// Locate the node for the white point and fix it to pure white in order to
avoid scum dot.
static
cmsBool FixWhiteMisalignment(cmsPipeline* Lut, cmsColorSpaceSignature
EntryColorSpace, cmsColorSpaceSignature ExitColorSpace)
{
cmsUInt16Number *WhitePointIn, *WhitePointOut;
cmsUInt16Number WhiteIn[cmsMAXCHANNELS], WhiteOut[cmsMAXCHANNELS],
ObtainedOut[cmsMAXCHANNELS];
cmsUInt32Number i, nOuts, nIns;
cmsStage *PreLin = NULL, *CLUT = NULL, *PostLin = NULL;
if (!_cmsEndPointsBySpace(EntryColorSpace,
&WhitePointIn, NULL, &nIns)) return FALSE;
if (!_cmsEndPointsBySpace(ExitColorSpace,
&WhitePointOut, NULL, &nOuts)) return FALSE;
// It needs to be fixed?
cmsPipelineEval16(WhitePointIn, ObtainedOut, Lut);
if (WhitesAreEqual(nOuts, WhitePointOut, ObtainedOut)) return TRUE; //
whites already match
// Check if the LUT comes as Prelin, CLUT or Postlin. We allow all
combinations
if (!cmsPipelineCheckAndRetreiveStages(Lut, 3, cmsSigCurveSetElemType,
cmsSigCLutElemType, cmsSigCurveSetElemType, &PreLin, &CLUT, &PostLin))
if (!cmsPipelineCheckAndRetreiveStages(Lut, 2, cmsSigCurveSetElemType,
cmsSigCLutElemType, &PreLin, &CLUT))
if (!cmsPipelineCheckAndRetreiveStages(Lut, 2, cmsSigCLutElemType,
cmsSigCurveSetElemType, &CLUT, &PostLin))
if (!cmsPipelineCheckAndRetreiveStages(Lut, 1,
cmsSigCLutElemType, &CLUT))
return FALSE;
Lut seem to be ok, CLUT is still NULL.
I had to talk my boss into the 2.0 port and he really doesn't want me debugging
this so unless it is quick I'm going to have to put this aside for now. But I
know I'll need to look at again someday. Thank you and merci!
Paul
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