Convert C Define Macro to C#

Question

How can I convert this C define macro to C#?

#define CMYK(c,m,y,k)       ((COLORREF)((((BYTE)(k)|((WORD)((BYTE)(y))<<8))|(((DWORD)(BYTE)(m))<<16))|(((DWORD)(BYTE)(c))<<24)))

I have been searching for a couple of days and have not been able to figure this out. Any help would be appreicated.

Do you mean how can you pack 4 bytes in to one interger - or how can you create a C# Color struct from CMYK parameters? — James Gaunt, Jun 03 '11 at 14:06

score 5 · Answer 1 · answered Jun 03 '11 at 14:08

5

C# doesn't support #define macros. Your choices are a conversion function or a COLORREF class with a converting constructor.

public class CMYKConverter
{
    public static int ToCMYK(byte c, byte m, byte y, byte k)
    {
        return k | (y << 8) | (m << 16) | (c << 24);
    }
}

public class COLORREF
{
    int value;
    public COLORREF(byte c, byte m, byte y, byte k)
    {
        this.value = k | (y << 8) | (m << 16) | (c << 24);
    }
}

answered Jun 03 '11 at 14:08

David Yaw

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1

it's also worth noting that COLORREF is intended to be a 32 bit RGB value. not sure what this code is doing but it's not a standard method of converting CMYK to rgb. http://stackoverflow.com/questions/2426432/convert-rgb-color-to-cmyk – madmik3 Jun 03 '11 at 14:11

score 2 · Answer 2 · answered Jun 03 '11 at 14:03

2

C# does not support C/C++ like macros. There is no #define equivalent for function like expressions. You'll need to write this as an actual method of an object.

answered Jun 03 '11 at 14:03

zellio

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Convert C Define Macro to C#

2 Answers2