static bool parseHSLParameters(CSSParserTokenRange& range, RGBA32& result, bool parseAlpha)
{
ASSERT(range.peek().functionId() == CSSValueHsl || range.peek().functionId() == CSSValueHsla);
CSSParserTokenRange args = consumeFunction(range);
CSSPrimitiveValue* hslValue = consumeNumber(args, ValueRangeAll);
if (!hslValue)
return false;
double colorArray[3];
colorArray[0] = (((hslValue->getIntValue() % 360) + 360) % 360) / 360.0;
for (int i = 1; i < 3; i++) {
if (!consumeCommaIncludingWhitespace(args))
return false;
hslValue = consumePercent(args, ValueRangeAll);
if (!hslValue)
return false;
double doubleValue = hslValue->getDoubleValue();
colorArray[i] = clampTo<double>(doubleValue, 0.0, 100.0) / 100.0; // Needs to be value between 0 and 1.0.
}
double alpha = 1.0;
if (parseAlpha) {
if (!consumeCommaIncludingWhitespace(args))
return false;
if (!consumeNumberRaw(args, alpha))
return false;
alpha = clampTo<double>(alpha, 0.0, 1.0);
}
result = makeRGBAFromHSLA(colorArray[0], colorArray[1], colorArray[2], alpha);
return args.atEnd();
}
static SkColor brightenColor(double h, double s, double l, float brightenAmount)
{
l += brightenAmount;
if (l > 1.0)
l = 1.0;
if (l < 0.0)
l = 0.0;
return makeRGBAFromHSLA(h, s, l, 1.0);
}
