The GmagickPixel::setcolorvalue() function is an inbuilt function in PHP which is used to set the normalized value of the provided color channel for a given GmagickPixel’s color. The normalized value is a floating-point number between 0 and 1.
Syntax:
GmagickPixel GmagickPixel::setcolorvalue( int $color, float $value )
Parameters: This function accepts two parameters as mentioned above and described below:
- $color: It specifies an integer which corresponds to one of 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.
Return Value: This function returns GmagickPixel object on success.
Exceptions: This function throws GmagickPixelException on error.
Below given programs illustrate the GmagickPixel::setcolorvalue() function in PHP:
Program 1:
php
<?php // Create a new gmagickPixel object $imagickPixel = new GmagickPixel(); // Set the color value $imagickPixel->setColorValue(gmagick::COLOR_RED, 0.8); // Get the Color value with gmagick::COLOR_RED $colorValue = $imagickPixel->getcolorvalue(gmagick::COLOR_RED); echo $colorValue; ?> |
Output:
0.8
Used Image:
Program 2:
php
<?php // Create a new gmagickPixel object $imagickPixel = new GmagickPixel(); // Create a new Gmagick object $gmagick = new Gmagick('neveropen.png'); // Create a new GmagickPixel object $gmagickPixel = new GmagickPixel(); // Set the color to red $gmagickPixel->setcolor('red'); // Set the color value of red to 0.5 for light red $gmagickPixel->setcolorvalue(gmagick::COLOR_RED, 0.5); // Create a GmagickDraw object $draw = new GmagickDraw(); // Set fill color using gmagickpixel $draw->setfillcolor($gmagickPixel); // Set the font size $draw->setfontsize(40); // Annotate a text $draw->annotate(180, 180, 'neveropen'); // Use of drawimage function $gmagick->drawImage($draw); // Display the output image header("Content-Type: image/png"); echo $gmagick->getImageBlob(); ?> |
Output:
Reference: https://www.php.net/manual/en/gmagickpixel.setcolorvalue.php
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