Imagick::colorizeImage

(PECL imagick 2, PECL imagick 3)

Imagick::colorizeImage — Blends the fill color with the image

说明

public Imagick::colorizeImage ( mixed $colorize , mixed $opacity , bool $legacy = false ) : bool

Blends the fill color with each pixel in the image.

参数

colorize: ImagickPixel object or a string containing the colorize color
opacity: ImagickPixel object or an float containing the opacity value. 1.0 is fully opaque and 0.0 is fully transparent.

返回值

成功时返回 true。

错误／异常

错误时抛出 ImagickException。

更新日志

版本	说明
PECL imagick 2.1.0	Now allows a string representing the color as the first parameter and a float representing the opacity value as the second parameter. Previous versions allow only an ImagickPixel objects.

范例

Example #1 Imagick::colorizeImage()


<?php
function colorizeImage($imagePath, $color, $opacity) {
    $imagick = new \Imagick(realpath($imagePath));
    $opacity = $opacity / 255.0;
    $opacityColor = new \ImagickPixel("rgba(0, 0, 0, $opacity)");
    $imagick->colorizeImage($color, $opacityColor);
    header("Content-Type: image/jpg");
    echo $imagick->getImageBlob();
}

?>

User Contributed Notes

Alex Lokhman [VisioN] 22-Mar-2014 02:35


If you're looking for a solution to fill the image with a solid color, preserving background transparency, here is one way:



<?php

$im = new Imagick('image.png');

$im->setImageAlphaChannel(Imagick::ALPHACHANNEL_EXTRACT);

$im->setImageBackgroundColor('color');

$im->setImageAlphaChannel(Imagick::ALPHACHANNEL_SHAPE);

$im->writeImage('output.png');

$im->destroy();

?>

olav at redwall dot ee 18-Dec-2013 12:24


To improve upon "php at lfbittencourt dot com"'s solution, this one blends the composited color, and takes opacity into account as well.



<?php

class YourImagick extends Imagick

{

    public function colorize($color, $alpha = 1, $composite_flag = Imagick::COMPOSITE_COLORIZE)

    {

        $draw = new ImagickDraw();



        $draw->setFillColor($color);



        $geometry = $this->getImageGeometry();

        $width = $geometry['width'];

        $height = $geometry['height'];



        $draw->rectangle(0, 0, $width, $height);



        $temporary = new Imagick();

        $temporary->setBackgroundColor(new ImagickPixel('transparent'));

        $temporary->newImage($width, $height, new ImagickPixel('transparent'));

        $temporary->setImageFormat('png32');

        $temporary->drawImage($draw);



        $alphaChannel = $this->clone();

        $alphaChannel->setImageAlphaChannel(Imagick::ALPHACHANNEL_EXTRACT);

        $alphaChannel->negateImage(false, Imagick::CHANNEL_ALL);

        $this->setImageClipMask($alphaChannel);



        $clone = $this->clone();

        $clone->compositeImage($temporary, $composite_flag, 0, 0);

        $clone->setImageOpacity($alpha);



        $this->compositeImage($clone, Imagick::COMPOSITE_DEFAULT, 0, 0);

    }

}

?>

php at lfbittencourt dot com 11-May-2012 01:26


Do you want a color overlay with TRUE opacity control? Try this:



<?php



class YourImagick extends Imagick

{

    public function colorize($color, $alpha = 1)

    {

        $draw = new ImagickDraw();



        $draw->setFillColor($color);



        if (is_float($alpha)) {

            $draw->setFillAlpha($alpha);

        }



        $geometry = $this->getImageGeometry();

        $width = $geometry['width'];

        $height = $geometry['height'];



        $draw->rectangle(0, 0, $width, $height);



        $this->drawImage($draw);

    }

}



?>



How to use:



<?php



$imagick = new YourImagick('example.png');



$imagick->colorize('#ffcc00', 0.35);



header('Content-type: image/png');



echo $source;



?>

talkol at gmail dot com 28-Dec-2011 07:19


When you're using an image with an alpha channel (for example a transparent png), a value of 1.0 will return a completely transparent image, but a value of 1 works just fine.

lsmartinez at gmail dot com 08-Apr-2009 09:42


simplest example



<?php

$nombre = '001-4-0043.jpg';

$img = new Imagick($nombre);

$img->negateImage(false);

//$pixblu = new ImagickPixel('#000040');

$img->colorizeImage('#0000b0',1.0);

header('content-type: image/jpeg');

echo $img;

?>