mlib_imagecolorrgb2hsl_fp(3mlib) [sunos man page]
mlib_ImageColorRGB2HSL_Fp(3MLIB) mediaLib Library Functions mlib_ImageColorRGB2HSL_Fp(3MLIB) NAME
mlib_ImageColorRGB2HSL_Fp - RGB to HSL color conversion SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ] #include <mlib.h> mlib_status mlib_ImageColorRGB2HSL_Fp(mlib_image *dst, const mlib_image *src); DESCRIPTION
The mlib_ImageColorRGB2HSL_Fp() function performs a conversion from red/green/blue to hue/saturation/lightness. The source and destination images must be three-channel images. It uses the following equations: V = max(R, G, B) Vmin = min(R, G, B) L = (V + Vmin)/2 S = (V - Vmin)/(V + Vmin) if L <= 1/2 S = (V - Vmin)/(2 - V - Vmin) if L > 1/2 H = (5.0 + (V - B)/(V - Vmin))/6 if R = V and G = Vmin H = (1.0 - (V - G)/(V - Vmin))/6 if R = V and B = Vmin H = (1.0 + (V - R)/(V - Vmin))/6 if G = V and B = Vmin H = (3.0 - (V - B)/(V - Vmin))/6 if G = V and R = Vmin H = (3.0 + (V - G)/(V - Vmin))/6 if B = V and R = Vmin H = (5.0 - (V - R)/(V - Vmin))/6 if B = V and G = Vmin H = 0.0 if R = G = B where 0 <= R, G, B, V, Vmin, L, S <= 1 and 0 <= H < 1. For MLIB_FLOAT and MLIB_DOUBLE images, the above equations are followed verbatim. Input R, G, and B component values must be limited to the [0.0, 1.0] range. PARAMETERS
The function takes the following arguments: dst Pointer to destination image. src Pointer to source image. RETURN VALUES
The function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
mlib_ImageColorHSL2RGB(3MLIB), mlib_ImageColorHSL2RGB_Fp(3MLIB), mlib_ImageColorRGB2HSL(3MLIB), attributes(5) SunOS 5.10 10 Nov 2004 mlib_ImageColorRGB2HSL_Fp(3MLIB)
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mlib_ImageColorHSL2RGB_Fp(3MLIB) mediaLib Library Functions mlib_ImageColorHSL2RGB_Fp(3MLIB) NAME
mlib_ImageColorHSL2RGB_Fp - HSL to RGB color conversion SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ] #include <mlib.h> mlib_status mlib_ImageColorHSL2RGB_Fp(mlib_image *dst, const mlib_image *src); DESCRIPTION
The mlib_ImageColorHSL2RGB_Fp() function performs a conversion from hue/saturation/lightness to red/green/blue. The source and destination images must be three-channel images. It uses the following equations: L' = L if L <= 1/2 L' = 1 - L if L > 1/2 V = L + S*L' P = L - S*L' Q = L + S*L'*(1 - 2*fraction(H*6)) T = L - S*L'*(1 - 2*fraction(H*6)) R, G, B = V, T, P if 0 <= H < 1/6 R, G, B = Q, V, P if 1/6 <= H < 2/6 R, G, B = P, V, T if 2/6 <= H < 3/6 R, G, B = P, Q, V if 3/6 <= H < 4/6 R, G, B = T, P, V if 4/6 <= H < 5/6 R, G, B = V, P, Q if 5/6 <= H < 1 where 0 <= H < 1 and 0 <= S, L, L', V, P, Q, T, R, G, B <= 1. For MLIB_FLOAT and MLIB_DOUBLE images, the above equations are followed verbatim. Input H component values must be limited to the [0.0, 1.0) range. Input S and L component values must be limited to the [0.0, 1.0] range. PARAMETERS
The function takes the following arguments: dst Pointer to destination image. src Pointer to source image. RETURN VALUES
The function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
mlib_ImageColorHSL2RGB(3MLIB), mlib_ImageColorRGB2HSL(3MLIB), mlib_ImageColorRGB2HSL_Fp(3MLIB), attributes(5) SunOS 5.10 10 Nov 2004 mlib_ImageColorHSL2RGB_Fp(3MLIB)