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Imagick::colorizeImage

(PECL imagick 2, PECL imagick 3)

Imagick::colorizeImageMezcla el color de relleno con la imagen

Descripción

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

Mezcla el color de relleno de cada píxel con la imagen.

Parámetros

colorize

Objeto ImagickPixel o una cadena que contiene el color

opacity

Objeto ImagickPixel o un valor float que contiene el valor de la opacidad. 1.0 es completamente opaco y 0.0 es completamente transparente.

Valores devueltos

Devuelve true en caso de éxito.

Errores/Excepciones

Lanza ImagickException en caso de error.

Historial de cambios

Versión Descripción
PECL imagick 2.1.0 Ahora se permite que una cadena represente el color como el primer parámetro y que un valor float represente el valor de la opacidad como el segundo parámetro. Versiones anteriores sólo permitían objetos ImagickPixel.

Ejemplos

Ejemplo #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();
}

?>

add a note

User Contributed Notes 6 notes

up
8
Alex Lokhman [VisioN]
9 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
3
olav at redwall dot ee
10 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
7
php at lfbittencourt dot com
11 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
1
adrien at unik dot solutions
1 year ago
The solution published by "olav at redwall dot ee " was adding a black surround outside each non-transparent shape.

Here is my improved version :

<?php
public function colorize($color, $alpha = 1)
{
$geometry = $this->getImageGeometry();
$width = $geometry['width'];
$height = $geometry['height'];

$draw = new ImagickDraw;
$draw->setFillColor($color);
$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);
$temporary->compositeImage($this, Imagick::COMPOSITE_COPYOPACITY, 0, 0);

$this->setImageArtifact('compose:args', ($alpha * 100) . '%,100%');
$this->compositeImage($temporary, Imagick::COMPOSITE_DISSOLVE, 0, 0);
}
?>
up
0
talkol at gmail dot com
12 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
-1
lsmartinez at gmail dot com
14 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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