C语言版： - void HSLtoRGB(float h, float s, float l, int* r, int* g, int* b) {
if (s == 0) {
// 灰色阶段
*r = *g = *b = l * 255;
} else {
float q = l < 0.5 ? l * (1 + s) : l + s - l * s;
float p = 2 * l - q;
float hk = h / 360.0;
float tr = hk + 1.0 / 3.0;
float tg = hk;
float tb = hk - 1.0 / 3.0;
// 确保值在0到1之间
if (tr < 0) tr += 1;
if (tr > 1) tr -= 1;
if (tg < 0) tg += 1;
if (tg > 1) tg -= 1;
if (tb < 0) tb += 1;
if (tb > 1) tb -= 1;
// 计算红、绿、蓝分量
*r = tr < 1.0/6.0 ? p + (q - p) * 6 * tr : tr < 1.0/2.0 ? q : tr < 2.0/3.0 ? p + (q - p) * 6 * (2.0/3.0 - tr) : p;
*g = tg < 1.0/6.0 ? p + (q - p) * 6 * tg : tg < 1.0/2.0 ? q : tg < 2.0/3.0 ? p + (q - p) * 6 * (2.0/3.0 - tg) : p;
*b = tb < 1.0/6.0 ? p + (q - p) * 6 * tb : tb < 1.0/2.0 ? q : tb < 2.0/3.0 ? p + (q - p) * 6 * (2.0/3.0 - tb) : p;
// 缩放到0到255之间
*r *= 255;
*g *= 255;
*b *= 255;
}
}
QT版： - #include <QColor>
QColor hslToRgb(int h, int s, int l)
{
qreal hue = h / 360.0;
qreal saturation = s / 100.0;
qreal lightness = l / 100.0;
if (saturation == 0) {
int value = lightness * 255;
return QColor(value, value, value);
}
qreal q = lightness < 0.5 ? lightness * (1 + saturation) : lightness + saturation - lightness * saturation;
qreal p = 2 * lightness - q;
qreal r = hueToRgb(p, q, hue + 1.0/3.0);
qreal g = hueToRgb(p, q, hue);
qreal b = hueToRgb(p, q, hue - 1.0/3.0);
int red = r * 255;
int green = g * 255;
int blue = b * 255;
return QColor(red, green, blue);
}
qreal hueToRgb(qreal p, qreal q, qreal t)
{
if (t < 0) t += 1;
if (t > 1) t -= 1;
if (t < 1.0/6.0) return p + (q - p) * 6 * t;
if (t < 1.0/2.0) return q;
if (t < 2.0/3.0) return p + (q - p) * (2.0/3.0 - t) * 6;
return p;
}
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