Imagick::colorizeImage

(PECL imagick 2.0.0)

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

说明

bool Imagick::colorizeImage ( mixed $colorize , mixed $opacity )

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
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 11:35


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 09:24


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 10:26


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 04:19


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 06:42


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;

?>