I am trying to replace libtiff into WIC (since libtiff is not able to pass Black Duck Analysis tool anymore)
I have used their example https://learn.microsoft.com/en-us/windows/win32/wic/-wic-creating-encoder
And I was able to create a tiff. I also needed to change the compression type so I change the code into
if (SUCCEEDED(hr))
{
// This is how you customize the TIFF output.
PROPBAG2 option = { 0 };
option.pstrName = L"TiffCompressionMethod";
VARIANT varValue;
VariantInit(&varValue);
varValue.vt = VT_UI1;
varValue.bVal = WICTiffCompressionRLE;
hr = pPropertybag->Write(1, &option, &varValue);
if (SUCCEEDED(hr))
{
hr = piBitmapFrame->Initialize(pPropertybag);
}
}
My new image has Resolution Unit 2 and I would like to set it into 1
I found out this https://learn.microsoft.com/en-us/windows/win32/wic/-wic-photoprop-system-image-resolutionunit but I do not understand how to use the WIC metadata API in order to change this.
Can you help?
The WIC built-in TIFF encoder always writes the TIFFTAG_RESOLUTIONUNIT
as 2 (inches). You can use WIC to read the existing tag, but you can't write a different value for this particular metadata item.