Looks like I'm becoming a "regular contributor" to this list...
I don't find it easy to figure out C# signature for all the lcms C
functions...
The original C function looks like this :
cmsUInt32Number cmsGetProfileInfo(
cmsHPROFILE hProfile,
cmsInfoType Info,
const char LanguageCode[3],
const char CountryCode[3],
wchar_t* Buffer,
cmsUInt32Number BufferSize);
The "best" DLLImport I could come up with, in C# is this :
[DllImport(@lcms2Path, CharSet = CharSet.Unicode)]
public extern static UInt32 cmsGetProfileInfo(
IntPtr hProfile,
int InfoType,
[MarshalAs(UnmanagedType.BStr)]string languageCode, //
UnmanagedType.BStr = A COM-style BSTR with a prefixed length and Unicode
characters.
[MarshalAs(UnmanagedType.BStr)]string countryCode,
[Out, MarshalAsAttribute(UnmanagedType.LPWStr)]
StringBuilder buffer,
UInt32 bufferSize);
And, in code, I call the function like this :
StringBuilder Buffer = new StringBuilder(255);
UInt32 Buffer=0;
UInt32 descSize;
descSize = cmsGetProfileInfo(hSource, 0, "en", "US", Buffer, 0);
When I execute the function, descSize = 0 and Buffer is empty...
----
I also tried this Import statement :
[DllImport(@lcms2Path, CharSet = CharSet.Unicode)]
public extern static UInt32 cmsGetProfileInfo(
IntPtr hProfile,
[In] int InfoType,
[In] string languageCode, // UnmanagedType.BStr = A
COM-style BSTR with a prefixed length and Unicode characters.
[In] string countryCode,
[Out] StringBuilder buffer,
[Out] UInt32 bufferSize);
But don't get any better?
For curiosity, I also tried the following in C :
wchar_t* Buffer;
cmsUInt32Number BufferSize, DescSize;
BufferSize = 0;
Buffer = NULL;
cmsInfoType Info;
Info = cmsInfoDescription;
DescSize = cmsGetProfileInfo(rgbProfile, Info, "en", "US", Buffer,
BufferSize);
When I execute the function, DescSize = 20 but Buffer is null and BufferSize
= 0.
/ Roger
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