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Man Pages


Manual Reference Pages  -  XMTHSLTORGB (3)

NAME

XmtHSLToRGB(), XmtRGBToHSL() - convert between the HSL and RGB color spaces.

CONTENTS

SYNOPSIS

   #include <Xmt/Color.h>

   void XmtHSLToRGB(unsigned h, unsigned s, unsigned l, unsigned *r, unsigned *g, unsigned *b)

   void XmtRGBToHSL(unsigned r, unsigned g, unsigned b, unsigned *h, unsigned *s, unsigned *l)

ARGUMENTS

h The Hue of the color. This is an input to XmtHSLToRGB() and an output from XmtRGBToHSL().
s The Saturation of the color. This is an input to XmtHSLToRGB() and an output from XmtRGBToHSL().
l The Lightness of the color. This is an input to XmtHSLToRGB() and an output from XmtRGBToHSL().
r The Red component of the color. This is an input to XmtRGBToHSL() and an output from XmtHSLToRGB().
g The Green component of the color. This is an input to XmtRGBToHSL() and an output from XmtHSLToRGB().
b The Blue component of the color. This is an input to XmtRGBToHSL() and an output from XmtHSLToRGB().

DESCRIPTION

XmtHSLToRGB() converts a color specified in the HSL color space to the equivalent color in the RGB color space. XmtRGBToHSL() performs the opposite conversion-from the RGB color space to the HSL color space.

In X, the r, g, and b components of an RGB color vary between 0 and 65535. As implemented by Xmt, the Hue of a HSL color is an angle between 0 and 359, and the Saturation and Lightness of a color vary between 0 and 100. Note that the h, s, and l arguments are unsigned, not float or double. See Chapter 6, Using Color, for more information on the HSL color space.

SEE ALSO

Chapter 4, Using Color,
XmtAllocColor(), XmtRegisterPixelConverter().
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