(PECL imagick 2, PECL imagick 3)
Imagick::colorizeImage — Blends the fill color with the image
Blends the fill color with each pixel in the image.
colorizeImagickPixel object or a string containing the colorize color
opacityImagickPixel object or an float containing the opacity value. 1.0 is fully opaque and 0.0 is fully transparent.
Returns true on success.
Throws ImagickException on error.
| Version | Description |
|---|---|
| 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. |
Example #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();
}
?>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');
$im->destroy();
?>To improve upon "php at lfbittencourt dot com"'s solution, this one blends the composited color, and takes opacity into account as well.
<?php
class YourImagick extends Imagick
{
public function colorize($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);
}
}
?>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 $source;
?>The solution published by "olav at redwall dot ee " was adding a black surround outside each non-transparent shape.
Here is my improved version :
<?php
public function colorize($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);
}
?>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.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;
?>