HSVREF

typedef struct _HSVREF 
{ 
   L_UCHAR uH; 
   L_UCHAR uS; 
   L_UCHAR uV; 
   L_UCHAR uReserved; 
} HSVREF, *pHSVREF; 

The HSVREF structure contains the Hue, Saturation and Value of a specific color.

Comments

pHSVREF is a pointer to an HSVREF structure.

The HSV value is the Hue ,Saturation, Value color space. Traditionally, hue ranges from 0 to 359. However, the hue component of the HSVREF is represented by an unsigned byte. Therefore, the range of 0 to 359 is remapped to a range of 0..255. For example,

Color

Hue(0..359)

Hue(0..255)

Red

0

0

Green

120

85

Blue

240

170

Saturation ranges from 0 to 255 where 0 means the highest amount of white and 255 means no white.

Value ranges from 0 to 255 where 0 means highest amount of black and 255 means no black.

This structure is used by both the L_HSVtoRGB and L_RGBtoHSV functions.

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