L_HSVtoRGB

#include "l_bitmap.h"

L_LTDIS_API L_COLORREF L_HSVtoRGB(hsvColor)

Returns a COLORREF value that is an equivalent representation of the specified HSV value.

Parameters

HSVREF hsvColor

The HSV input value.

Returns

An L_COLORREF that contains the RGB equivalent of the specified HSV value.

Comments

This function does not support signed data images. It returns the error code ERROR_SIGNED_DATA_NOT_SUPPORTED if a signed data image is passed to this function.

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.

Required DLLs and Libraries

Platforms

Win32, x64, Linux.

See Also

Functions

Topics

Example

This example takes displays the H,S,V value of a HSVREF and the equivalent RGB components.

L_INT HSVtoRGBExample(HSVREF hsvColor) 
{ 
   L_TCHAR  szMsg[100]; 
   COLORREF cr; 
 
   wsprintf(szMsg, TEXT("Hue[%d] Saturation[%d] Value[%d]\n"), hsvColor.uH, hsvColor.uS, hsvColor.uV); 
   MessageBox(NULL, szMsg, TEXT(""), MB_OK); 
 
   cr = L_HSVtoRGB(hsvColor); 
 
   wsprintf(szMsg, TEXT("R[%d] G[%d] B[%d]\n"), GetRValue(cr), GetBValue(cr), GetGValue(cr)); 
   MessageBox(NULL, szMsg, TEXT(""), MB_OK); 
   return SUCCESS; 
} 

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