SunshinePHP Developer Conference 2015

Imagick::colorizeImage

(PECL imagick 2.0.0)

Imagick::colorizeImageBlends the fill color with the image

Description

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

Blends the fill color with each pixel in the image.

Parameters

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.

Return Values

Returns TRUE on success.

Errors/Exceptions

Throws ImagickException on error.

Changelog

Version Description
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.

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User Contributed Notes 5 notes

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5
php at lfbittencourt dot com
2 years ago
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;

?>
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0
Alex Lokhman [VisioN]
6 months ago
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();
?>
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0
olav at redwall dot ee
10 months ago
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);
    }
}
?>
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0
talkol at gmail dot com
2 years ago
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.
up
0
lsmartinez at gmail dot com
5 years ago
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;
?>
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