ImagickPixel::setHSL
(PECL imagick 2.0.0)
ImagickPixel::setHSL — Sets the normalized HSL color
Description
bool ImagickPixel::setHSL ( float $hue , float $saturation , float $luminosity )Sets the color described by the ImagickPixel object using normalized values for hue, saturation and luminosity.
Parameters
hue
The normalized value for hue, described as a fractional arc (between 0 and 1) of the hue circle, where the zero value is red.
saturation
The normalized value for saturation, with 1 as full saturation.
luminosity
The normalized value for luminosity, on a scale from black at 0 to white at 1, with the full HS value at 0.5 luminosity.
Return Values
Returns TRUE on success.
Examples
Example #1 Use ImagickPixel::setHSL() to modify a color
<?php
//Create?an?almost?pure?red?color
$color?=?new?ImagickPixel('rgb(90%,?10%,?10%)');
//Get?it's?HSL?values
$colorInfo?=?$color->getHSL();
//Rotate?the?hue?by?180?degrees
$newHue?=?$colorInfo['hue']?+?0.5;
if?($newHue?>?1)?{
????$newHue?=?$newHue?-?1;
}
//Set?the?ImagickPixel?to?the?new?color
$colorInfo?=?$color->setHSL($newHue,?$colorInfo['saturation'],?$colorInfo['luminosity']);
//Check?that?the?new?color?is?blue/green
$colorInfo?=?$color->getcolor();
print_r($colorInfo);
?>The above example will output:
Array
(
[r] => 26
[g] => 230
[b] => 230
[a] => 255
)Notes
Note: Available with ImageMagick library version 6.2.9 and higher.
← ImagickPixel::setColorValueQuantum
ImagickPixel::setIndex →
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