How is defined the data type FXPT2DOT30 in the BMP file structure?

Question

The type FXPT2DOT30 appears in defining the struct CIEXYZ for BMP files, according to the definition provided by Microsoft:

http://msdn.microsoft.com/en-us/library/windows/desktop/dd371828(v=vs.85).aspx

However, I cannot found the exact definition of FXPT2DOT30 anywhere. Which is its precise definition? What kind of data is supposed to hold?

user_11196063 · Answer

From gdiplus.h:

typedef long FXPT2DOT30, FAR *LPFXPT2DOT30;

typedef struct tagCIEXYZ
{
        FXPT2DOT30 ciexyzX;
        FXPT2DOT30 ciexyzY;
        FXPT2DOT30 ciexyzZ;
} CIEXYZ;

How is defined the data type FXPT2DOT30 in the BMP file structure?

3 Answers