Hi All
I have been asked to convert our v1.18 code to V2.6 in a quick a time as
possible. I have no experience of either v1 or v2 code so could someone please
point me in the right direction, the LUT code is particularly problematic?
The code I'm having trouble with is below.
hICC = _cmsCreateProfilePlaceholder();
if (!hICC) // can't allocate
return NULL;
cmsSetDeviceClass(hICC, icSigOutputClass);
cmsSetColorSpace(hICC, ColorSpace);
cmsSetPCS(hICC, icSigLabData);
cmsSetRenderingIntent( hICC, intent );
// Creates a LUT with 3D grid only
Lut = cmsAllocLUT();
cmsAlloc3DGrid(Lut, 48, _cmsChannelsOf(icSigLabData),
_cmsChannelsOf(ColorSpace));
if (!cmsSample3DGrid(Lut, ProfileResampler, (LPVOID) this, 0)) {
// Shouldn't reach here
cmsFreeLUT(Lut);
cmsCloseProfile(hICC);
return NULL;
}
// Create tags
cmsAddTag(hICC, icSigDeviceMfgDescTag, (LPVOID) "(ixPressia
internal)");
cmsAddTag(hICC, icSigProfileDescriptionTag, (LPVOID) "ixPressia extended
profile");
cmsAddTag(hICC, icSigDeviceModelDescTag, (LPVOID) "ixPressia built-in");
cmsAddTag(hICC, icSigMediaWhitePointTag, (LPVOID) cmsD50_XYZ());
icTagSignature sig1 = icSigAToB0Tag;
icTagSignature sig2 = icSigBToA0Tag;
switch (intent)
{
case 0:
sig1 = icSigAToB0Tag;
sig2 = icSigBToA0Tag;
break;
case 1: // relative colourimetric
case 3: // absolute colourimetric - should be same as relative
not saturated as it was previously
sig1 = icSigAToB1Tag;
sig2 = icSigBToA1Tag;
break;
case 2: // saturated
sig1 = icSigAToB2Tag;
sig2 = icSigBToA2Tag;
break;
}
// PCS->Device LUT
cmsAddTag(hICC, sig2, (LPVOID) Lut);
// Device->PCS LUT
if (ColorSpace == icSigCmykData)
{
// Use for PRESERVE BLACK only
LPLUT cmsLut2 = cmsReadICCLut( input_profile,
sig1 );
cmsAddTag(hICC, sig1, (LPVOID) cmsLut2 );
}
else
{
cmsAddTag(hICC, sig1, (LPVOID) Lut );
}
// LUT is already on virtual profile
cmsFreeLUT(Lut);
Thanks in advance
Dave Freer
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