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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.

    示例

    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 6 notes

    up
    8
    Alex Lokhman [VisioN]
    10 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
    11 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);
        }
    }
    ?>
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    7
    php at lfbittencourt dot com
    12 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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    1
    adrien at unik dot solutions
    2 years 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);
    }
    ?>
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    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
    15 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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