Need to convert COLORREF to COLOR16

[CoffeeAddict19]

I need to convert a COLORREF value to 3 COLOR16 (hex) values. I'm trying to fill out this structure:

typedef struct _TRIVERTEX {
  LONG        x;
  Long        y;
  COLOR16     Red;
  COLOR16     Green;
  COLOR16     Blue;
  COLOR16     Alpha;
}TRIVERTEX, *PTRIVERTEX;

GetRValue, GetGValue, and GetBValue will give me color intensity integers, but those need to be converted to hex values. So to be more precise I need to convert from an integer to a COLOR16 hex value. Anyone got ideas?

[Michael Dunn]

From the docs:

The color information of each channel is specified as a value from 0x0000 to 0xff00.

So you can take the one-byte value from the COLORREF and multiply by 256.

--Mike-- Visual C++ MVP :cool: LINKS~! Ericahist | PimpFish | CP SearchBar v3.0 | C++ Forum FAQ

[CoffeeAddict19]

How do I take the 1 byte value from it?

[Michael Dunn]

It's the value returned by GetXValue:

COLORREF cr = RGB(64,128,196); // the original COLORREF
BYTE red = GetRValue(cr); // the red value in the range 0-255
COLOR16 red16 = red * 256; // multiply to convert it to the range of COLOR16

--Mike-- Visual C++ MVP :cool: LINKS~! Ericahist | PimpFish | CP SearchBar v3.0 | C++ Forum FAQ

[CoffeeAddict19]

Thanks.

[Mark Salsbery]

COLORREF colorref = RGB(0x01,0x02,0x03); TRIVERTEX TriVertex; TriVertex.Red = (COLOR16)GetRValue(colorref) << 8; TriVertex.Green = (COLOR16)GetGValue(colorref) << 8; TriVertex.Blue = (COLOR16)GetBValue(colorref) << 8;