Hi,
I've got a problem building an LCMS project for Win32. I've built
several previous projects using LCMS with no problems so I'm surprised
to have run into this one.
The program is a very trivial affair that converts and XYZ value into
RGB and prints the result. It does this in an endless loop.
Compiled for Linux, (Mandrake 9.2, LCMS 1.14, G++, 3.3.1) with
g++ lcmstest.cpp -llcms
it does indeed loop until killed.
Compiled for Win32, with
i586-mingw32msvc-g++ lcmstest -L. -llcms
it does this:
wine: Unhandled exception (thread 0009), starting debugger...
WineDbg starting on pid 0x8
Unhandled exception: page fault on write access to 0x999999a2 in 32-bit
code (0x00401271).
(It's not a WINE bug - it crashes on a real windows box too)
The code itself is as follows:
--
#include <iostream>
#define PACKAGE_NAME "cmstest"
#include <lcms.h>
#include <stdlib.h>
using namespace std;
void GetMeasurement(double *vals)
{
cout << "Fetching values:" << endl;
vals[0]=0.2;
vals[1]=0.2;
vals[2]=0.2;
}
int main(int argc,char **argv)
{
cmsHPROFILE xyz=cmsCreateXYZProfile();
cmsHPROFILE rgb=cmsCreate_sRGBProfile();
cmsHTRANSFORM
trans=cmsCreateTransform(xyz,TYPE_XYZ_DBL,rgb,TYPE_RGB_16,INTENT_ABSOLUTE_COLORIMETRIC,0);
while(1)
{
double src[3];
unsigned short dst[3];
GetMeasurement(src);
cout << "X: " << src[0] << ", Y: " << src[1] << ", Z: " << src[2] << "
-> ";
cmsDoTransform(trans,src,dst,1);
cout << "R: " << dst[0] << ", G: " << dst[1] << ", B: " << dst[2]
<< endl;
}
cmsDeleteTransform(trans);
cmsCloseProfile(rgb);
cmsCloseProfile(xyz);
return(0);
}
--
The code, binary and DLL are at
http://www.blackfiveservices.co.uk/bugtest.zip if anyone has time to
take a look.
Am I doing some spectacularly stupid here, or is it a GCC bug, or an
LCMS bug?
All the best,
--
Alastair M. Robinson
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