COLORREF HLS_TRANSFORM (COLORREF rgb, int percent_L, int percent_S)
{
HLSCOLOR hls = RGB2HLS (rgb);
BYTE h = HLS_H(hls);
BYTE l = HLS_L(hls);
BYTE s = HLS_S(hls);
if ( percent_L > 0 )
{
l = BYTE(l + ((255 - l) * percent_L) / 100);
}
else if ( percent_L < 0 )
{
l = BYTE((l * (100+percent_L)) / 100);
}
if ( percent_S > 0 )
{
s = BYTE(s + ((255 - s) * percent_S) / 100);
}
else if ( percent_S < 0 )
{
s = BYTE((s * (100+percent_S)) / 100);
}
return HLS2RGB (HLS(h, l, s));
}
void OperaColors::EnlightenFlood(const COLORREF& clr, COLORREF& a, COLORREF& b) {
HLSCOLOR hls_a = ::RGB2HLS(clr);
HLSCOLOR hls_b = hls_a;
BYTE buf = HLS_L(hls_a);
if (buf < 38)
buf = 0;
else
buf -= 38;
a = ::HLS2RGB(HLS(HLS_H(hls_a), buf, HLS_S(hls_a)));
buf = HLS_L(hls_b);
if (buf > 217)
buf = 255;
else
buf += 38;
b = ::HLS2RGB(HLS(HLS_H(hls_b), buf, HLS_S(hls_b)));
}
COLORREF HLS2RGB (HLSCOLOR hls)
{
float hue = ((int)HLS_H(hls)*360)/255.0f;
float luminance = HLS_L(hls)/255.0f;
float saturation = HLS_S(hls)/255.0f;
if ( saturation == 0.0f )
{
return RGB (HLS_L(hls), HLS_L(hls), HLS_L(hls));
}
float rm1, rm2;
if ( luminance <= 0.5f ) rm2 = luminance + luminance * saturation;
else rm2 = luminance + saturation - luminance * saturation;
rm1 = 2.0f * luminance - rm2;
BYTE red = _ToRGB (rm1, rm2, hue + 120.0f);
BYTE green = _ToRGB (rm1, rm2, hue);
BYTE blue = _ToRGB (rm1, rm2, hue - 120.0f);
return RGB (red, green, blue);
}