Looking for help with accessing the cmsTempFromWhitePoint() function from
C#.
My import statement is as follows:
[DllImport(@lcms2Path)]
public static extern bool cmsTempFromWhitePoint(IntPtr TempK, IntPtr
WhitePoint)
The WhitePoint CIE xyY is declared this way:
[StructLayout(LayoutKind.Sequential)]
public struct cmsCIExyY
{
public double x;
public double y;
public double Y;
};
I create variable to hold CIExyY structure this way:
cmsCIExyY CIExyY;
My function call looks like this:
IntPtr TempK = IntPtr.Zero;
IntPtr unmanagedAddr = Marshal.AllocHGlobal(Marshal.SizeOf(CIExyY));
// Allocate unmanaged memory
Marshal.StructureToPtr(CIExyY, unmanagedAddr, true);
// marshall the structure to the memory
bool Result = cmsTempFromWhitePoint(tempK, unmanagedAddr);
But I get "Assertion failed" when executing the call:
(TempK != ((void *)0))
I am confident in my code to marshall the CIExyY structure from managed to
unmanaged memory.
But I have no clue how to approach the TempK pointer?
I think the error says "Wrong type of Pointer" was supplied.
Best / Roger
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