Imagick::colorizeImage

(PECL imagick 2.0.0)

Imagick::colorizeImageBlends the fill color with the image

Descrição

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

Blends the fill color with each pixel in the image.

Parâmetros

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.

Valor Retornado

Retorna TRUE no sucesso.

Erros

Lança ImagickException em caso de erro.

Changelog

Versão Descrição
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.

Exemplos

Exemplo #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();
}

?>

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User Contributed Notes 5 notes

up
3
Alex Lokhman [VisioN]
2 years 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();
?>
up
5
php at lfbittencourt dot com
4 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;

?>
up
2
olav at redwall dot ee
2 years 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);
    }
}
?>
up
1
talkol at gmail dot com
4 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
7 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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