PHP | ImagickPixel setColorValueQuantum() function
The ImagickPixel::setColorValueQuantum() function is an inbuilt function in PHP which is used to set the value of the provided color channel for a given ImagickPixel’s color. The value can be in a range from 0 to 65535.
Syntax:
bool ImagickPixel::setColorValueQuantum( int $color, float $value )
Parameters:This function accepts two parameters as mentioned above and described below:
- $color: It specifies the COLOR constants.
List of all COLOR constants are given below:
- imagick::COLOR_BLACK (11)
- imagick::COLOR_BLUE (12)
- imagick::COLOR_CYAN (13)
- imagick::COLOR_GREEN (14)
- imagick::COLOR_RED (15)
- imagick::COLOR_YELLOW (16)
- imagick::COLOR_MAGENTA (17)
- imagick::COLOR_OPACITY (18)
- imagick::COLOR_ALPHA (19)
- imagick::COLOR_FUZZ (20)
- $value: It specifies the value to be set.
Return Value: This function returns TRUE on success.
Exceptions: This function throws ImagickException on error.
Below given programs illustrate the ImagickPixel::setColorValueQuantum() function in PHP:
Program 1:
<?php
$imagickPixel = new ImagickPixel();
$imagickPixel ->setColorValueQuantum(imagick::COLOR_BLUE, 4500);
$colorValue = $imagickPixel ->getColorValueQuantum(imagick::COLOR_BLUE);
echo $colorValue ;
?>
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Output:
4500
Program 2:
<?php
$imagick = new Imagick(
$imageIterator = $imagick ->getPixelIterator();
$x = 200;
foreach ( $imageIterator as $row => $pixels ) {
if ( $row % 2) {
foreach ( $pixels as $column => $pixel ) {
if ( $column % 1000) {
$pixel ->setColor( "red" );
$pixel ->setColorValueQuantum(Imagick::COLOR_RED, $x );
$x = $x + 1000;
}
}
}
$imageIterator ->syncIterator();
}
header( "Content-Type: image/jpg" );
echo $imagick ;
?>
|
Output:
Reference: https://www.php.net/manual/en/imagickpixel.setcolorvaluequantum.php
Last Updated :
02 Jan, 2020
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