PHP - Manual: Imagick::colorizeImage

2024-11-14

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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

示例 #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

down

Alex Lokhman [VisioN] ¶

8 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();
?>

down

php at lfbittencourt dot com ¶

10 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;

?>

down

olav at redwall dot ee ¶

8 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);
    }
}
?>

down

talkol at gmail dot com ¶

10 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.

down

-2

lsmartinez at gmail dot com ¶

13 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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官方地址：https://www.php.net/manual/en/imagick.colorizeimage.php

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Imagick::colorizeImage

说明

参数

返回值

错误／异常

更新日志

范例

User Contributed Notes 5 notes